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1,910,608 | THIS IS A TEST | THIS IS A TEST THIS IS A TEST | 0 | 2024-07-03T18:49:06 | https://dev.to/alyconr/this-is-a-test-o83 | # THIS IS A TEST
<p>THIS IS A TEST</p> | alyconr |
|
1,910,604 | How to easily fix OpenSSH RegreSSHion vulnerability | The regreSSHion vulnerability CVE-2024-6387 is a critical remote unauthenticated code execution (RCE)... | 0 | 2024-07-03T18:48:21 | https://dev.to/indyman/how-to-easily-fix-openssh-regresshion-vulnerability-216b | security, ubuntu, devops, news | The `regreSSHion` vulnerability `CVE-2024-6387` is a critical remote unauthenticated code execution (RCE) vulnerability affecting OpenSSH server (sshd) on glibc-based Linux systems. If exploited, this vulnerability can lead to:
- Complete system takeover
- Installation of malware
- Data manipulation and exfiltration
- Creation of backdoors for persistent access
- Network propagation to other systems within the organization
Exploiting this vulnerability allows attackers to bypass critical security mechanisms and cause significant damage.
## Solution for Ubuntu
### Check your Ubuntu version
To check your Ubuntu version, run the following command in your terminal:
```bash
lsb_release -a
```
This command will display information about your Ubuntu distribution, including the release name.
### How to fix the vulnerability
To fix the `regreSSHion` vulnerability on your Ubuntu server, follow these steps:
1. **Update the package list and install available updates:**
```bash
sudo apt update
sudo apt upgrade
```
2. **Ensure you are running the latest version of OpenSSH for your release:**
```bash
sudo apt install --only-upgrade openssh-server
```
👉 If you like this article, you can [follow me on Twitter](https://x.com/_indyman)
### Check if the fix is installed
Ensure the version at least matches the patched version for your Ubuntu release:
```bash
dpkg -l | grep openssh-server
```
- Jammy: `1:8.9p1-3ubuntu0.10`
- Mantic: `1:9.3p1-1ubuntu3.6`
- Noble: `1:9.6p1-3ubuntu13.3`
## Protect your server with automatic updates
**Unattended Upgrades** is a package on Ubuntu that allows automatic installation of security updates and critical packages without user intervention. This can help ensure that your system is always up-to-date with the latest security patches, including the fix for vulnerabilities like `regreSSHion`.
If you had unattended upgrades configured on your Ubuntu system, it would have automatically applied the security update for OpenSSH as soon as it was available, thereby mitigating the vulnerability without requiring manual intervention.
### How to Set Up Unattended Upgrades
Follow these steps to set up unattended upgrades on your Ubuntu system:
1. **Install Unattended Upgrades:**
```bash
sudo apt update
sudo apt install unattended-upgrades
```
2. **Enable Unattended Upgrades:**
```bash
sudo dpkg-reconfigure --priority=medium unattended-upgrades
```
### Checking If Unattended Upgrades Is Working
To verify that unattended upgrades are functioning correctly:
1. **Check the Status of the Service:**
```bash
sudo systemctl status unattended-upgrades
```
2. **Review the Log Files:**
Review the logs to see if updates have been applied:
```bash
sudo tail -f /var/log/unattended-upgrades/unattended-upgrades.log
```
By setting up unattended upgrades, you can ensure that critical security updates, like those for the `regreSSHion` vulnerability, are applied automatically, enhancing the security of your Ubuntu server without manual intervention.
🎯 Find my next blog articles earlier on [https://easyselfhost.dev/blog](https://easyselfhost.dev/blog) | indyman |
1,910,607 | THIS IS A TEST | THIS IS A TEST THIS IS A TEST | 0 | 2024-07-03T18:48:00 | https://dev.to/alyconr/this-is-a-test-4f2a | # THIS IS A TEST
<p>THIS IS A TEST</p> | alyconr |
|
1,910,600 | How to set up a static website on Azure Blob Storage | Hosting a static website on Azure Blob Storage is a cost-effective and scalable solution. Here's a... | 0 | 2024-07-03T18:47:33 | https://dev.to/adeola_adebari/how-to-set-up-a-static-website-on-azure-blob-storage-3d65 | Hosting a static website on Azure Blob Storage is a cost-effective and scalable solution.
Here's a step-by-step guide to help you set up a static website on Azure Blob Storage:
## Step-by-Step Guide to Hosting a Static Website on Azure Blob Storage
## Sign in to Azure Portal:
1 - Open a web browser and go to the Azure portal.
2 - Sign in with your Azure account credentials.
## Create a Storage Account:
1 - In the Azure portal, click on "Create a resource" in the upper-left corner.
2 - In the "Search the Marketplace" box, type "Storage account" and select it from the list.
3 - Click on the "Create" button.
4 - Fill in the necessary details:
- Subscription: Select your subscription.
- Resource group: Select an existing resource group or create a new one.
- Storage account name: Provide a unique name for your storage account.
- Region: Choose the region closest to your users.
- Performance: Choose Standard.
- Replication: Choose your desired replication option (e.g., LRS, GRS).
5 - Click on the "Review + create" button, and then click "Create".
## Enable Static Website Hosting:
1 - Once the storage account is created, navigate to it.
2 - In the storage account menu, scroll down to the "Data management" section and click on "Static website".
3 - Click on the "Enabled" button.
4 - Specify the default file name (e.g., index.html) and the error document path (e.g., 404.html).
5 - Click on the "Save" button. After saving, you will see a primary endpoint URL, which is the URL of your static website.
## Upload Your Website Files:
1 - In the storage account menu, go to "Containers" under the "Data storage" section.
2 - A container named $web will be created automatically for static website hosting. Click on the $web container.
3 - Launch Visual Studio Code, highlight your website files (e.g., HTML, CSS, JavaScript, images) and click on " upload to azure storage".
4 - Select your resource group and storage name.
5 - Select "Blob Container" from the option.
6 - Select your container name in this case "$web"
7 - Click the enter key on your keyboard to initiate upload.
8 - Your website files are successfully uploaded.
## Access Your Static Website:
1 - After uploading your files, navigate to the static website endpoint URL provided in the static website settings.
2 - Your static website should now be live and accessible via the URL.
| adeola_adebari |
|
1,910,606 | THIS IS A TEST | THIS IS A TEST THIS IS A TEST | 0 | 2024-07-03T18:46:17 | https://dev.to/alyconr/this-is-a-test-h20 | # THIS IS A TEST
<p>THIS IS A TEST</p> | alyconr |
|
1,910,605 | Automating a Bash Script | Ever wondered how you can simplify a monotonous task? Worry no more! But before we delve further,... | 0 | 2024-07-03T18:45:13 | https://dev.to/sophie_ejikeme/automating-a-bash-script-1ah1 | Ever wondered how you can simplify a monotonous task? Worry no more! But before we delve further, what do we actually mean by a script? And why do we have a script? In the context of Bash, a script is a text file containing a series of Bash commands to be executed sequentially.
So, a Bash script will contain some commands intended to carry out a function or task.
**A Realistic Scenario**
Imagine you have a repetitive task to carry out. Or imagine that you want to add a good number of employees to a group, a Bash script can automate this for you. Such script should be able to perform the tasks below:
1. Create users and groups
2. Set up home directories with appropriate permissions and ownership
3. Generate random passwords for the users
4. Log all actions to /var/log/user_management.log.
5. Store the generated passwords securely in /var/secure/user_passwords.txt
Now, how can this be done?
**Explanation**
**Step 1: Check root privileges**
Since user and group management commands require administrative access, the script verifies if it’s run as root.
**Check if script is run as root**
if [[ $EUID -ne 0 ]]; then
echo "This script must be run as root"
exit 1
fi
**Step 2: Read the user file**
The script checks if the user file is provided as an argument and uses it when it is executed
Check if the file with users and their corresponding groups exists
if ["$#" -ne 1]; then
echo "Use: $0 <user_file>"
exit 1
fi
**Step 3: Initialize password and log file**
We will initialize the values of the log and password file. If the files do not exist, we need to create them. For the password file, we need to set appropriate permissions where only the user can read and write it.
INPUT_FILE=$1
LOG_FILE="/var/log/user_management.log"
PASSWORD_FILE="/var/secure/user_passwords.txt"
**Ensure log file exists and has correct permissions**
touch "$LOG_FILE"
chmod 600 "$LOG_FILE"
**Ensure password file exists and has correct permissions**
touch "$PASSWORD_FILE"
chmod 600 "$PASSWORD_FILE"
**Step 4: Create a user function**
The purpose of the function is :
Checking if the user already exists.
Creating a personal group for each user.
Creating the user and adding them to specified groups.
Generating a random password.
Setting the user’s password.
Logging the action and storing the password securely.
**script to create users and groups from a file**
if [ $# -ne 1 ]; then
echo "Usage: $0 <input_file>"
exit 1
fi
INPUT_FILE=$1
**Log and password file paths**
LOG_FILE="/var/log/user_management.log"
PASSWORD_FILE="/var/secure/user_passwords.txt"
!/bin/bash
**Script: create_users.sh**
Description: This script Creates users and groups based on input file, sets up home directories,
generates random passwords, and logs all actions.
Usage: ./create_users.sh <input_file>
Check if script is run as root
if [[ $EUID -ne 0 ]]; then
echo "This script must be run as root"
exit 1
fi
Check if input file is provided
if [[ $# -eq 0 ]]; then
echo "Usage: $0 <input_file>"
exit 1
fi
INPUT_FILE=$1
LOG_FILE="/var/log/user_management.log"
PASSWORD_FILE="/var/secure/user_passwords.txt"
Ensure log file exists and has correct permissions
touch "$LOG_FILE"
chmod 600 "$LOG_FILE"
Ensure password file exists and has correct permissions
touch "$PASSWORD_FILE"
chmod 600 "$PASSWORD_FILE"
Function to log messages
log_message() {
echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" >> "$LOG_FILE"
}
Function to generate a random password
generate_password() {
openssl rand -base64 12 | tr -d '=+/'
}
Read input file line by line
while IFS=';' read -r username groups; do
# Skip empty lines
[[ -z "$username" ]] && continue
Create user if it doesn't exist
if id "$username" &>/dev/null; then
log_message "User $username already exists. Skipping user creation."
else
useradd -m -s /bin/bash "$username"
if [[ $? -eq 0 ]]; then
log_message "User $username created successfully."
else
log_message "Failed to create user $username."
continue
fi
fi
Set up home directory permissions
chmod 700 "/home/$username"
log_message "Set permissions for /home/$username"
Generate and set random password
password=$(generate_password)
echo "$username:$password" | chpasswd
echo "$username:$password" >> "$PASSWORD_FILE"
log_message "Set password for user $username"
Create and add user to groups
IFS=',' read -ra group_array <<< "$groups"
for group in "${group_array[@]}"; do
if ! getent group "$group" &>/dev/null; then
groupadd "$group"
log_message "Group $group created."
fi
usermod -aG "$group" "$username"
log_message "Added user $username to group $group"
done
done < "$INPUT_FILE"
log_message "User creation process completed."
echo "User creation process completed. Check $LOG_FILE for details."
**Running the Script**
1. Create users file
Add your users and their groups in the format user;groups. Save and close the file.
2. Make the file and the script executable
chmod +x users.txt
chmod +x create_script.sh
3. Run the Script
sudo ./create_script.sh users.txt
_Points to Consider_
- Save this script as create_users.sh. Open your terminal, for example, Ubuntu, type nano create_users.sh
Ensure you save and exit (just type ctrl o, click enter and then ctrl x).
- Make it executable e.g chmod +x create_users.sh
- Create a text file where you'll have the names of the users and their groups e.g nano users.txt
type names of employees using this format - Jones;Dev,Audit
**Conclusion**
This automation promotes time saving, productivity and efficiency.
**About HNG Internship**
HNG Internship is a fast-paced bootcamp for learning digital skills. It's focused on advanced learners and those with some pre-knowledge, and it gets people into shape for job offers. In the HNG bootcamp, you work in teams to build apps and solve problems. For more information on what they offer, you can reach them through the link below.
https://hng.tech/internship, https://hng.tech/hire | sophie_ejikeme |
|
1,910,603 | Part 1: Mastering Modules in Node.js | In our digital world, everything around us is part of a vast tech ecosystem with software at its... | 0 | 2024-07-03T18:40:35 | https://dev.to/iam-phenomenal/part-1-mastering-modules-in-nodejs-3mm5 | node, npm, javascript, typescript | **In our digital world, everything around us is part of a vast tech ecosystem with software at its core.** Over the years, a plethora of programming languages have been created to develop software. Some are problem-specific, some are multi-functional, and others have evolved from being problem-specific to multi-functional. JavaScript, at its genesis, was a programming language designed to bring interactivity to web applications. It's come a long way since then, and JavaScript now offers much more.
**Node.js is a JavaScript runtime environment built on the Chrome V8 engine, allowing execution of JavaScript code outside web browsers.** One of its core strengths lies in its modular structure. By the end of this article, you will have a clear understanding of what modules are, what problem they are trying to solve and how to use them.
#### Understanding Modules Through DRY and SRP
If you're familiar with the software development principles of DRY (Don't Repeat Yourself) and SRP (Single Responsibility Principle), then you've grasped the core problems that modules address. Modules are blocks of code that encapsulate related functionalities, making them reusable and maintainable. A well-written module adheres to both DRY and SRP principles, offering several advantages:
##### Code Reusability:
Instead of duplicating code across your application, you can create a module and reuse it wherever needed. This reduces redundancy and minimizes errors.
##### Maintenance:
Updating the logic becomes simpler and less error-prone. With modules, you only need to change the code in one place (the module itself) rather than modify it in multiple locations throughout your application.
##### Separation of Concerns:
Modules allow developers to break down complex applications into smaller, manageable parts with focused functionalities. This improves code readability and fosters better collaboration within development teams, as developers can work on specific modules without worrying about unintended side effects in other areas of the application.
##### Namespace Management:
Modules prevent naming conflicts. Variables and functions declared within a module are local to that module, avoiding clashes with global variables or variables used in other modules. to that module, avoiding clashes with global variables or variables used in other modules.
#### Types of Modules:
In Node.JS there are three(3) types of modules, these are;
##### Core/Built-in Modules:
These are built-in modules that come pre-installed with Node.js, providing essential functionalities like file system access (`fs`), HTTP communication (`http`), and path manipulation (`path`).
##### Local/Custom Modules:
These are modules you define within your application. They can be imported across different parts of your project extending its functionalities.
##### Third-Party Modules:
These are the third-party modules you import using the `npm install` or `yarn add` command. These modules are developed by other developers and published in the software registry.
#### How to create Local/Custom Modules:
Depending on your module syntax, creating a module in Node.js can be done either of the ways listed below:
##### CJS (Common JavaScript):
```
// Define code block
function add(arg1, arg2) {
return arg1 + arg2;
}
// Export code block
module.exports = add;
```
```
// Define code block
class MathHelper {
add(arg1, arg2) {
return arg1 + arg2
}
}
module.exports = MathHelper
```
##### ES6 (ECMAScript 2015):
```
function add(arg1, arg2) {
return arg1 + arg2;
}
// Export code block
export { add };
```
```
export function add(arg1, arg2) {
return arg1 + arg2;
}
`
```
```
class MathHelper {
add(arg1, arg2) {
return arg1 + arg2
}
}
// Export code block
export default add;
```
#### Importing Modules in Node.js
Despite the three different types of modules in Node.js (core, local, and third-party), the import process remains consistent. However, the specific syntax you use might differ depending on your chosen module syntax style.
##### CJS (Common JavaScript):
```
// Built-in/Core Module
const http = require("http");
// Custom/Local Module
const add = require("./mathUtils");
// Third-Party Module
const express = require("express")
```
##### ES6 (ECMAScript 2015):
```
// Built-in/Core Module
import http from "http";
// Custom/Local Module
import add from "./mathUtils";
// Third-Party Module
import express from "express"
```
#### Conclusion
In this first part of our series on Node.js modules, we unpacked the essentials. We explored how modules promote code reusability, maintainability, and separation of concerns—the cornerstones of clean code. We also covered the different types of modules available: core modules, custom local modules you define within your project, and the vast ecosystem of third-party modules accessible through npm.
Stay tuned for part two, where we'll delve deeper into the technical aspects. We'll explore module wrappers, their role in providing private scope and caching, and how they differ from Immediately Invoked Function Expressions (IIFEs). We'll also discuss module caching in detail, explaining how Node.js optimizes performance by storing the results of required modules.
For further reading check out the [Official Node.js Documentation on Modules](https://nodejs.org/api/modules.html) | iam-phenomenal |
1,910,602 | Part 1: Mastering Modules in Node.js | In our digital world, everything around us is part of a vast tech ecosystem with software at its... | 0 | 2024-07-03T18:40:34 | https://dev.to/iam-phenomenal/part-1-mastering-modules-in-nodejs-1kg9 | node, npm, javascript, typescript | **In our digital world, everything around us is part of a vast tech ecosystem with software at its core.** Over the years, a plethora of programming languages have been created to develop software. Some are problem-specific, some are multi-functional, and others have evolved from being problem-specific to multi-functional. JavaScript, at its genesis, was a programming language designed to bring interactivity to web applications. It's come a long way since then, and JavaScript now offers much more.
**Node.js is a JavaScript runtime environment built on the Chrome V8 engine, allowing execution of JavaScript code outside web browsers.** One of its core strengths lies in its modular structure. By the end of this article, you will have a clear understanding of what modules are, what problem they are trying to solve and how to use them.
#### Understanding Modules Through DRY and SRP
If you're familiar with the software development principles of DRY (Don't Repeat Yourself) and SRP (Single Responsibility Principle), then you've grasped the core problems that modules address. Modules are blocks of code that encapsulate related functionalities, making them reusable and maintainable. A well-written module adheres to both DRY and SRP principles, offering several advantages:
##### Code Reusability:
Instead of duplicating code across your application, you can create a module and reuse it wherever needed. This reduces redundancy and minimizes errors.
##### Maintenance:
Updating the logic becomes simpler and less error-prone. With modules, you only need to change the code in one place (the module itself) rather than modify it in multiple locations throughout your application.
##### Separation of Concerns:
Modules allow developers to break down complex applications into smaller, manageable parts with focused functionalities. This improves code readability and fosters better collaboration within development teams, as developers can work on specific modules without worrying about unintended side effects in other areas of the application.
##### Namespace Management:
Modules prevent naming conflicts. Variables and functions declared within a module are local to that module, avoiding clashes with global variables or variables used in other modules. to that module, avoiding clashes with global variables or variables used in other modules.
#### Types of Modules:
In Node.JS there are three(3) types of modules, these are;
##### Core/Built-in Modules:
These are built-in modules that come pre-installed with Node.js, providing essential functionalities like file system access (`fs`), HTTP communication (`http`), and path manipulation (`path`).
##### Local/Custom Modules:
These are modules you define within your application. They can be imported across different parts of your project extending its functionalities.
##### Third-Party Modules:
These are the third-party modules you import using the `npm install` or `yarn add` command. These modules are developed by other developers and published in the software registry.
#### How to create Local/Custom Modules:
Depending on your module syntax, creating a module in Node.js can be done either of the ways listed below:
##### CJS (Common JavaScript):
```
// Define code block
function add(arg1, arg2) {
return arg1 + arg2;
}
// Export code block
module.exports = add;
```
```
// Define code block
class MathHelper {
add(arg1, arg2) {
return arg1 + arg2
}
}
module.exports = MathHelper
```
##### ES6 (ECMAScript 2015):
```
function add(arg1, arg2) {
return arg1 + arg2;
}
// Export code block
export { add };
```
```
export function add(arg1, arg2) {
return arg1 + arg2;
}
`
```
```
class MathHelper {
add(arg1, arg2) {
return arg1 + arg2
}
}
// Export code block
export default add;
```
#### Importing Modules in Node.js
Despite the three different types of modules in Node.js (core, local, and third-party), the import process remains consistent. However, the specific syntax you use might differ depending on your chosen module syntax style.
##### CJS (Common JavaScript):
```
// Built-in/Core Module
const http = require("http");
// Custom/Local Module
const add = require("./mathUtils");
// Third-Party Module
const express = require("express")
```
##### ES6 (ECMAScript 2015):
```
// Built-in/Core Module
import http from "http";
// Custom/Local Module
import add from "./mathUtils";
// Third-Party Module
import express from "express"
```
#### Conclusion
In this first part of our series on Node.js modules, we unpacked the essentials. We explored how modules promote code reusability, maintainability, and separation of concerns—the cornerstones of clean code. We also covered the different types of modules available: core modules, custom local modules you define within your project, and the vast ecosystem of third-party modules accessible through npm.
Stay tuned for part two, where we'll delve deeper into the technical aspects. We'll explore module wrappers, their role in providing private scope and caching, and how they differ from Immediately Invoked Function Expressions (IIFEs). We'll also discuss module caching in detail, explaining how Node.js optimizes performance by storing the results of required modules.
For further reading check out the [Official Node.js Documentation on Modules](https://nodejs.org/api/modules.html) | iam-phenomenal |
1,910,597 | Created My Portfolio | Created My Portfolio I recently built a system to automate the process of updating my... | 0 | 2024-07-03T18:36:38 | https://dev.to/hirohata/created-my-portfolio-1hnf | typescript, portfolio | # Created My Portfolio
I recently built a system to automate the process of updating my portfolio and resume. This approach eliminates the need for frequent manual updates, ensuring that my online presence always reflects my latest accomplishments and skills.
## Portfolio
* [Portfolio](https://portfolio-9ym.pages.dev/)
* [REST API](https://rest-api.honwakapappa-honwakapappa.workers.dev/docs)
* [GraphQL](https://graphql.honwakapappa-honwakapappa.workers.dev/graphql)
## Background
Initially, I set out to create a traditional portfolio website. However, during the planning stage, I realized that the core information for both a portfolio and a resume is essentially the same: showcasing my skills and experience. With this realization, I decided to explore a more integrated approach. This resulted in a system that automatically updates both my portfolio and resume whenever I update my resume content.
## Structure
The diagram of this system's overview is the following:
My portfolio system leverages [server-side rendering (SSR) within the Astro framework](https://docs.astro.build/en/guides/server-side-rendering/) to ensure users always access the latest information. Here's how it works:
1. User Accesses Portfolio: When a user visits my portfolio website, the server hosting the portfolio initiates a call to my information API ([details explained later](#information-management-module)).
2. API Data Extraction: The information API returns my most recent data.
3. Server-Side Rendering: Astro utilizes SSR to render the portfolio on the server, incorporating the fetched data from the API.
4. Fresh Content Delivered: The server then delivers the fully rendered HTML content, including the latest information, to the user's browser.
## Modular System Design
My portfolio system is comprised of two well-defined modules, each housed in its own dedicated GitHub repository with integrated deployment via GitHub Actions to [Cloudflare Pages](https://pages.cloudflare.com/) or [Cloudflare Workers](https://developers.cloudflare.com/workers/).
### Modules
#### Portfolio Frontend
This Astro-based module is solely responsible for the visual presentation of the portfolio. It retrieves and displays information from the information management module but doesn't store any user data itself.
#### Information Management Module
This comprehensive module manages all user information and related functionalities. It consists of four distinct components:
##### Information Storage
This component leverages TypeScript to define the structure and types for user data in JSON format. This file acts as a schema, ensuring data consistency and enabling type safety within the system. The user information itself is stored directly within this TypeScript file, utilizing the defined JSON structure.
##### Resume Generation
This component leverages [Astro](https://astro.build/) to dynamically generate a resume in HTML format based on the user's information. A subsequent automated process within GitHub Actions converts the HTML to PDF and ensures its deployment to both GitHub artifacts and Cloudflare.
##### REST API
This component, built with [Hono](https://hono.dev/?kawaii=true) and [Swagger UI middleware](https://hono.dev/examples/swagger-ui), provides a RESTful interface for accessing and potentially manipulating user information.
##### GraphQL API
This component, built with [GraphQL Yoga](https://the-guild.dev/graphql/yoga-server), offers a GraphQL interface for interacting with user data.
## Summary
By providing my latest information as API, it allows users to create my portfolio as they like. So you can create a cool portfolio for me. I cannot wait to see my nice and cool portfolio site that will be created by YOU!😜 | hirohata |
1,910,601 | Deep Dive: Fortifying Your Cloud Defences with AWS Multi-Factor Authentication (MFA) | Today, we shall delve deep into the intricacies of AWS MFA, unravelling its inner workings and... | 0 | 2024-07-03T18:36:21 | https://dev.to/ikoh_sylva/deep-dive-fortifying-your-cloud-defences-with-aws-multi-factor-authentication-mfa-2cjc | cloudcomputing, cloudskills, aws, cloudpractitioner | Today, we shall delve deep into the intricacies of AWS MFA, unravelling its inner workings and unveiling the myriad strategies at our disposal to fortify our cloud identities. Brace yourselves, for this expedition will equip you with the knowledge and tactics to erect an impregnable fortress, safeguarding your AWS kingdom from even the most persistent and insidious threats.
**The Clarion Call: Understanding the Importance of MFA**
In the ever-evolving landscape of cyber security, the traditional username and password paradigm has proven inadequate, akin to defending a castle with mere wooden stakes. Malicious actors have become increasingly adept at infiltrating these antiquated defences, exploiting weaknesses and compromising identities with alarming ease.
Enter Multi-Factor Authentication, a robust and multi-layered security measure that introduces additional barriers to unauthorized access, much like the concentric rings of a formidable citadel. By mandating not only a password but also a secondary form of authentication, such as a one-time code or biometric verification, MFA erects an impenetrable gauntlet that even the most cunning adversaries will struggle to surpass.
The AWS MFA Arsenal: Exploring Your Options
AWS, ever vigilant in its pursuit of robust security, offers a diverse array of MFA options, each tailored to meet the unique demands of your cloud environment. Let us explore these formidable tools, for they shall serve as the foundation upon which we construct our impregnable defences.
- AWS Virtual MFA Device
The AWS Virtual MFA Device is a software-based solution that generates time-sensitive, one-time passwords (OTPs) on compatible devices, such as smartphones or tablets. This virtual device leverages robust cryptographic algorithms and synchronizes with AWS services, ensuring a seamless and secure authentication experience.
- AWS Hardware MFA Device
For those seeking an even more robust solution, AWS offers dedicated hardware MFA devices. These physical tokens generate OTPs, providing an additional layer of security by physically separating the authentication factor from potential software vulnerabilities or device compromises.
- AWS Microsoft Authenticator App
In a strategic alliance with Microsoft, AWS has embraced the Microsoft Authenticator app as a trusted MFA solution. This app, available on both mobile and desktop platforms, leverages industry-standard protocols to generate OTPs and facilitate secure authentication across AWS services.
- Third-Party Time-based One-Time Password (TOTP)-Compatible Apps
AWS recognizes the diverse preferences and requirements of its customers, and as such, it supports a wide range of third-party Time-based One-Time Password (TOTP) compatible apps, such as Google Authenticator, Authy, and LastPass Authenticator. This flexibility empowers you to leverage the MFA solution that best aligns with your organization's existing security infrastructure and policies.
**Fortifying Your AWS Identities: A Comprehensive MFA Deployment Strategy**
With a robust understanding of the available MFA options, we now turn our attention to the intricate art of deploying and managing MFA across your AWS environment. This multifaceted endeavour requires a holistic approach, encompassing technical configurations, operational procedures, and a steadfast commitment to security best practices.
- Define Your MFA Policy
The first step in fortifying your AWS identities lies in establishing a comprehensive MFA policy. This crucial document should outline the scope of MFA implementation, the approved MFA methods, and the specific AWS services and resources that will mandate MFA authentication. Engage with stakeholders from various departments, including security, operations, and compliance, to ensure a holistic and well-rounded policy that aligns with your organization's security posture and regulatory requirements.
- Implement MFA for Root User and Privileged IAM Users
As the crown jewels of your AWS kingdom, the Root User and privileged IAM Users must be safeguarded with the utmost vigilance. Prioritize the implementation of MFA for these identities, ensuring that any administrative or highly privileged actions are protected by multiple layers of authentication.
- Enforce MFA for All IAM Users
While securing the Root User and privileged IAM Users is paramount, a truly robust security posture demands the enforcement of MFA across all IAM Users. Leverage AWS Identity and Access Management (IAM) policies to mandate MFA authentication for all user activities, adhering to the principle of least privilege and minimizing the risk of unauthorized access or data breaches.
- Integrate MFA with AWS Services and Applications
AWS MFA extends beyond IAM Users, offering protection for a wide array of services and applications. Explore the integration of MFA with services such as AWS Management Console, AWS Command Line Interface (CLI), AWS APIs, and AWS CodeCommit, ensuring a consistent and comprehensive security perimeter across your entire cloud ecosystem.
- Enable AWS CloudTrail and Monitoring
As with any security measure, the implementation of MFA must be accompanied by rigorous monitoring and auditing practices. Leverage AWS CloudTrail to meticulously log and track all MFA-related activities, enabling the detection of potential security incidents, unauthorized access attempts, and compliance violations. Integrate CloudTrail logs with security information and event management (SIEM) solutions for real-time analysis and alerting.
- Implement Regular Access Reviews and Rotation
Security is a continuous journey, and complacency is the enemy of robust defences. Establish regular access reviews to ensure that MFA configurations remain aligned with evolving security requirements and personnel changes. Additionally, implement periodic rotations of MFA credentials, such as virtual or hardware MFA devices, to mitigate the risk of compromised authentication factors.
- Educate and Train Your Team
Even the most robust security measures can be undermined by human error or lack of awareness. Invest in comprehensive training and education programs to ensure that your team members understand the importance of MFA, its proper usage, and the potential consequences of non-compliance. Foster a culture of security awareness and vigilance, empowering your team to become active participants in safeguarding your AWS kingdom.
**Embracing Resilience: The Advantages of AWS MFA**
As we navigate the perilous terrain of cloud security, the implementation of AWS MFA bestows upon us a myriad of advantages, fortifying our defences and enabling us to withstand even the most relentless assaults.
- Enhanced Identity Protection
By introducing additional authentication factors beyond traditional passwords, MFA significantly reduces the risk of unauthorized access, even in the event of compromised credentials. This multi-layered approach ensures that malicious actors must overcome multiple barriers, rendering their nefarious endeavours increasingly difficult and resource-intensive.
- Compliance and Regulatory Adherence
In today's regulatory landscape, data protection and security are paramount concerns. By implementing AWS MFA, you demonstrate a commitment to industry best practices and compliance with various regulatory frameworks, such as PCI DSS, HIPAA, and GDPR, mitigating the risk of hefty fines and reputational damage.
- Increased Visibility and Auditability
With AWS CloudTrail integration, MFA activities are meticulously logged and monitored, providing invaluable insights into access patterns, potential security incidents, and compliance violations. This heightened visibility empowers you to proactively identify and address potential vulnerabilities, reducing the risk of data breaches and minimizing the impact of security incidents.
- Simplified Access Management
By leveraging AWS MFA in conjunction with IAM policies and roles, you can streamline access management processes, ensuring that only authorized individuals and applications can access specific resources. This granular control minimizes the risk of accidental or malicious misconfigurations, reinforcing the principle of least privilege across your cloud environment.
- Scalability and Flexibility
AWS MFA seamlessly adapts to the ever-evolving demands of your cloud infrastructure, offering a wide range of compatible authentication methods and integration options. Whether you're a small start-up or a global enterprise, AWS MFA scales effortlessly, providing a consistent and robust security foundation as your cloud footprint expands.
**The Continuous Journey: Vigilance and Adaptation**
As we conclude our deep dive into the realm of AWS Multi-Factor Authentication, it is imperative to recognize that security is an ever-evolving pursuit, a continuous journey that demands unwavering vigilance and adaptation.
Embrace a proactive mind-set, staying abreast of emerging threats, new authentication technologies, and evolving best practices. Subscribe to AWS security bulletins, engage with the broader cloud security community, and foster a culture of continuous learning within your organization.
Remember, the path to true security is paved with diligence, resilience, and an unyielding commitment to fortifying your cloud defences. Leverage the power of AWS MFA, and you shall erect.
I am Ikoh Sylva a Cloud Computing Enthusiast with few months hands on experience on AWS. I’m currently documenting my Cloud journey here from a beginner’s perspective. If this sounds good to you kindly like and follow, also consider recommending this article to others who you think might also be starting out their cloud journeys.
You can also consider following me on social media below;
[LinkedIn](http://www.linkedin.com/in/ikoh-sylva-73a208185) [Facebook](https://www.facebook.com/Ikoh.Silver) [X](x.com/Ikoh_Sylva)
| ikoh_sylva |
1,910,599 | Developing Smart Contracts for Cross-Chain Operations: A Comprehensive Guide | Smart contracts coding is a pivotal part of blockchain development, with Solidity being the primary... | 0 | 2024-07-03T18:28:07 | https://dev.to/vincent_lee_190635/developing-smart-contracts-for-cross-chain-operations-a-comprehensive-guide-1efi | Smart contracts coding is a pivotal part of blockchain development, with Solidity being the primary language for creating them on Ethereum.
However, as the blockchain universe expands, cross-chain or interoperable solutions have gained traction.
This article enlightens how to develop smart contracts on a cross-chain platform, specifically focusing on how they can operate seamlessly among diverse blockchain networks.
**Cross-Chain Technology Overview**
Cross-chain technology facilitates interaction and interoperability among different blockchain networks.
It allows transactions to occur between distinct blockchains, thus overcoming the limitations of blockchain networks operating in silos.
The ability for multiple, disparate blockchains to communicate and share information is revolutionary for the digital ledger technology field.
**Understanding Cross-Chain Smart Contracts**
Developing a cross-chain smart contract involves creating a decentralized application that operates on multiple blockchains without compromising its functionality.
For instance, converting ERC20 tokens (native to the Ethereum platform) into BEP2 tokens (native on the Binance chain).
**Tools for Developing Cross-Chain Smart Contracts**
Several tools and platforms offer the interoperability needed for cross-chain smart contracts deployment.
Key players in this field include Polkadot, Cosmos, and Chainlink.
**Creating a Simple Cross-Chain Smart Contract**
Let’s create a simple cross-chain smart contract using Solidity and Chainlink.
This contract will interact with multiple blockchains like Ethereum and Binance Smart Chain.
Notice: You need to have a Metamask account, Rinkeby testnet Ether, and BNB (binance coin for testing on Binance Smart Chain).
```
solidity
pragma solidity ^0.7.3;
import "@chainlink/contracts/src/v0.7/ChainlinkClient.sol";
contract CrossChainContract is ChainlinkClient {
uint256 oraclePayment;
constructor() public {
setPublicChainlinkToken();
oraclePayment = 0.1 * 10 ** 18;
}
function requestEthereumPrice() public returns (bytes32 requestId) {
Chainlink.Request memory request = buildChainlinkRequest(
jobid,
address(this),
this.fulfill.selector
);
request.add("get", "https://eth-price-feed.com/");
return sendChainlinkRequestTo(oracle, request, oraclePayment);
}
function fulfill(bytes32 _requestId, uint256 _payment) public recordChainlinkFulfillment(_requestId) {
oraclePayment = _payment;
}
}
```
In this simple contract:
1. ChainlinkClient is inherited so we can connect to Chainlink nodes.
2. oraclePayment represents the amount paid to the Chainlink node for data.
3. The Constructor sets the Link token as the standard currency for payment.
4. requestEthereumPrice creates a Chainlink request and sends it.
5. fulfill function receives the data from Chainlink and can then be used within our smart contract.
Once ready, deploy these contracts on your chosen blockchains.
Make sure to set the right parameters for the Chainlink node and contract addresses.
With these contracts, we can obtain and incorporate data from multiple chains and create truly interoperable dApps.
Keep in mind that the complexity of your smart contract will depend on the specifics of your project—this is just an elementary example.
Test your contracts thoroughly before deploying them to mainnet networks.
The future of blockchain technology lies in the capability to seamlessly integrate various blockchain platforms, and cross-chain smart contracts are at the heart of this development.
Thus, honing skills in this area will make you an invaluable asset in the ever-evolving blockchain industry. | vincent_lee_190635 |
|
1,909,648 | ServiceNow Mid-Server Insights | ServiceNow Mid servers, also known as Management Instrumentation and Discovery, play a crucial role... | 0 | 2024-07-03T18:25:13 | https://dev.to/sophiasemga/servicenow-mid-server-insights-48b9 | serverless, cloud, vim, tutorial | **ServiceNow Mid servers**, also known as Management Instrumentation and Discovery, play a crucial role in extending the platform's capabilities. These Java applications, installed on external servers, act as bridges, fetching data from third-party sources and delivering it back to ServiceNow.
####What are Mid Servers and How Do They Work?
Mid servers facilitate seamless data flow between ServiceNow and external applications, services, and data sources. They initiate communication with the ServiceNow instance and leverage the External Communication Channel (ECC) Queue for message exchange. This queue acts as a communication log, allowing data insertion, updates, and queries.
####ECC Queue: The Communication Hub
Think of the ECC Queue as a central communication point. It houses two record types:
Output Probes: Instructions sent by ServiceNow to the mid-server for data retrieval.
Input Probes: Responses containing retrieved data sent by the mid-server back to ServiceNow.
####Security is Paramount
Secure connections are essential for both mid-server installation and data discovery. ServiceNow utilizes `HTTPS:443` for encrypted communication with the mid-server. Similarly, the mid server establishes secure network connections with data sources to ensure information integrity.
####Installing a Mid Server in ServiceNow
#####1.<u>Create a User and Give Them the Mid-Server Role</u>
•Go to the sys_user table on your ServiceNow instance to create a new user who will interact with the mid-server. `This user account is created to have a specific account to manage the integration, preventing it from stopping. Using other user accounts risks termination or revocation, which can cause the server to stop running.`
•Create a user and set a password.
•Once the user is created, give them the `mid-server` role.
#####2.<u>Download the Mid Server</u>
•Search for `“Mid Server”` in your application navigator and click on `“Downloads”` to download the mid server. Select the appropriate installer based on your operating system (e.g., Windows, Linux).
•Download the mid-server.
•Once the download is complete, it will be accessible under your file downloads.
•Go to your files and create a folder in your `C: drive`, which will act as your directory. In the directory, create a new folder and name it.
•Under downloads, where your mid server has been downloaded, right-click to `extract all` and select the folder you created under your directory so that it is extracted into the designated folder.
•Go to your drive/folder, which now contains mid-server contents, and click on the `agent folder`.
•Under the agent folder, click on the `config XML file` and fill in the required parameters, including your instance URL`(ex,https://dev210312.service-now.com/)`
the username `(ex, midserver_user)`
and password of the user you created and assigned the mid-server role to, and create a name.
**Then save.**
#####3.<u>Validate and Update</u>
•Wait for it to populate on your instance under mid_server. Then click on it to validate and update it. Wait for it to validate and for the status to be up.
•Once the status is populated, congratulations! You have successfully installed a mid server into your ServiceNow instance.
####Upgrading the Mid Server
ServiceNow mid servers typically perform periodic checks for upgrade availability. Upon detecting a newer version, they automatically download and install the upgrade package. Manual upgrades are also an option.
####Troubleshooting Mid-Server Issues
#####1. <u>Restarting the Mid Server:</u>
You can restart the mid-server through the ServiceNow UI or the Command Line Interface (CLI).
#####UI Method
•Sign in to ServiceNow.
•Go to “System Definition” and select “Mid Servers.”
•Choose the mid-server that needs restarting.
•Click the “Restart” button at the top.
•Wait a few minutes until the mid-server status changes to “Running.”
•Verify its connectivity and performance.
#####CLI Method
•Log into the machine hosting the mid-server.
•Execute commands from ServiceNow documentation.
#####2.<u>Checking Mid-Server Logs:</u>
The mid-server logs, located in the installation directory, offer valuable insights into any issues encountered.
####ServiceNow Applications that Leverage Mid Servers:
.Discovery
.Service Mapping
.Event Management
.Cloud Management
.Integration Hub
.Orchestration
####External Applications that Utilize Mid Servers:
.Import sets
.Microsoft System Center Configuration Manager (SCCM)
.Microsoft Identity Integration Server (MIIS)
.Microsoft System Center Operations Manager (SCOM)
####Compatibility Matters
For seamless communication, ensure compatibility between the mid-server version and your ServiceNow instance version. The mid-server version should at least belong to the same major release (e.g., Tokyo) as the instance. While minor version compatibility (e.g., Tokyo Patch 1) might work, it's highly recommended to upgrade to the latest version for optimal performance and security.
####Conclusion
ServiceNow mid servers are powerful tools for extending platform functionality. By understanding their purpose, configuration process, and use cases, you can leverage them to streamline data integration and enhance your overall ServiceNow experience.
______________________________________________________
ServiceNow Product Documentation on MidServers:
What is a mid-server: https://docs.servicenow.com/bundle/washingtondc-servicenow-platform/page/product/mid-server/concept/mid-server-landing.html
Configure mid-server parameters: https://docs.servicenow.com/bundle/washingtondc-servicenow-platform/page/product/mid-server/reference/mid-server-parameters.html
| sophiasemga |
1,910,506 | Understanding Virtual Machines and Hypervisors | ** Introduction ** In the era of cloud computing, virtual machines (VMs) and hypervisors... | 0 | 2024-07-03T18:17:42 | https://dev.to/hacker_haii/understanding-virtual-machines-and-hypervisors-13em | devops, virtualmachine, cloud, aws | **
## Introduction
**
In the era of cloud computing, virtual machines (VMs) and hypervisors have become essential components of IT infrastructure. This detailed article aims to provide IT professionals and developers with a thorough understanding of what virtual machines and hypervisors are, their benefits, and how they are utilized in real-world cloud computing scenarios.
**
## What is a Virtual Machine?
**
**Definition:** A virtual machine (VM) is a software emulation of a physical computer. It runs an operating system and applications just like a physical computer but operates in an isolated environment on a host machine.
**Components:** VMs consist of virtualized hardware resources such as CPU, memory, storage, and network interfaces. These resources are managed by the hypervisor.
**Types of VMs:** There are two primary types of virtual machines: system VMs, which emulate a complete physical machine, and process VMs, which run a single process or application.
**
## What is a Hypervisor?
**
**Definition:** A hypervisor, also known as a virtual machine monitor (VMM), is a layer of software that enables the creation and management of virtual machines. It abstracts the physical hardware resources and allocates them to VMs.
## Types of Hypervisors:
**Type 1 (Bare-Metal Hypervisors):** These run directly on the host’s hardware, providing high performance and efficient resource management. Examples include VMware ESXi, Microsoft Hyper-V, and Xen.
**Type 2 (Hosted Hypervisors):** These run on top of a host operating system, making them easier to set up but often less efficient than Type 1 hypervisors. Examples include VMware Workstation and Oracle VirtualBox.
**
## Benefits of Using Virtual Machines and Hypervisors
**
**Resource Efficiency:** VMs allow multiple operating systems and applications to run on a single physical machine, maximizing hardware utilization and reducing costs.
**Isolation and Security:** Each VM operates in an isolated environment, enhancing security by preventing issues in one VM from affecting others.
**Scalability and Flexibility:** Hypervisors enable easy scaling of resources up or down based on demand, making VMs ideal for dynamic workloads.
**Disaster Recovery:** VMs can be easily backed up, cloned, and migrated, facilitating robust disaster recovery and business continuity plans.
**Real-World Example:** Virtual Machines and Hypervisors in Cloud Computing
**Cloud Providers:** Major cloud service providers like Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP) heavily rely on VMs and hypervisors to offer scalable and flexible cloud services.
**Use Case:** In AWS, the Elastic Compute Cloud (EC2) service uses Xen and Nitro hypervisors to manage instances. Customers can quickly provision VMs, called instances, to run applications without worrying about underlying hardware.
**
## Case Study:
** A multinational corporation uses Azure VMs to run its global ERP system. By leveraging VMs, the company can dynamically allocate resources based on regional demand, ensuring optimal performance and cost efficiency.
**
## Comparison to Other Technologies
**
**Containers vs. VMs:** Containers provide a lightweight alternative to VMs by sharing the host OS kernel. While containers offer faster startup times and more efficient resource usage, VMs provide stronger isolation and security.
**Bare-Metal Servers vs. VMs:** Bare-metal servers offer direct access to hardware, delivering maximum performance for high-demand applications. However, they lack the flexibility and resource optimization provided by VMs.
**
## Conclusion
**
Virtual machines and hypervisors are foundational technologies in modern IT infrastructure, particularly in cloud computing. By understanding their functions, benefits, and real-world applications, IT professionals and developers can better leverage these tools to optimize performance, enhance security, and achieve greater operational efficiency. | hacker_haii |
1,910,502 | HTML Table tag A to Z | HTML Tables: A Comprehensive Guide Tables are a fundamental part of HTML used to display... | 0 | 2024-07-03T18:11:00 | https://dev.to/ridoy_hasan/html-tabl-tag-a-to-z-13an | webdev, beginners, html, learning | ### HTML Tables: A Comprehensive Guide
Tables are a fundamental part of HTML used to display tabular data. In this article, we'll explore how to create and style tables effectively, along with examples and best practices.
#### 1. Basic Table Structure
A basic HTML table is created using the `<table>` element. Within the table, rows are defined using the `<tr>` tag, and each cell within a row is defined using the `<td>` tag. Table headers can be defined using the `<th>` tag.
**Example: Basic Table**
```html
<!DOCTYPE html>
<html>
<head>
<title>Basic Table Example</title>
</head>
<body>
<h1>Basic HTML Table</h1>
<table border="1">
<tr>
<th>Header 1</th>
<th>Header 2</th>
<th>Header 3</th>
</tr>
<tr>
<td>Row 1, Cell 1</td>
<td>Row 1, Cell 2</td>
<td>Row 1, Cell 3</td>
</tr>
<tr>
<td>Row 2, Cell 1</td>
<td>Row 2, Cell 2</td>
<td>Row 2, Cell 3</td>
</tr>
</table>
</body>
</html>
```
**Output:**
**Basic HTML Table**
| Header 1 | Header 2 | Header 3 |
|----------------|----------------|----------------|
| Row 1, Cell 1 | Row 1, Cell 2 | Row 1, Cell 3 |
| Row 2, Cell 1 | Row 2, Cell 2 | Row 2, Cell 3 |
In this example, the table has a border and contains two rows of data, each with three cells.
#### 2. Adding a Caption
A table caption provides a title or description for the table and is defined using the `<caption>` tag.
**Example: Table with Caption**
```html
<!DOCTYPE html>
<html>
<head>
<title>Table with Caption Example</title>
</head>
<body>
<h1>HTML Table with Caption</h1>
<table border="1">
<caption>Monthly Sales Data</caption>
<tr>
<th>Month</th>
<th>Sales</th>
</tr>
<tr>
<td>January</td>
<td>$1000</td>
</tr>
<tr>
<td>February</td>
<td>$1200</td>
</tr>
</table>
</body>
</html>
```
**Output:**
**HTML Table with Caption**
**Monthly Sales Data**
| Month | Sales |
|-----------|--------|
| January | $1000 |
| February | $1200 |
In this example, the table has a caption that describes the data it contains.
#### 3. Table Headers and Footers
Tables can have headers and footers defined using the `<thead>` and `<tfoot>` tags, respectively. These elements help to organize table data.
**Example: Table with Headers and Footers**
```html
<!DOCTYPE html>
<html>
<head>
<title>Table with Headers and Footers Example</title>
</head>
<body>
<h1>HTML Table with Headers and Footers</h1>
<table border="1">
<thead>
<tr>
<th>Product</th>
<th>Price</th>
</tr>
</thead>
<tbody>
<tr>
<td>Apples</td>
<td>$1.00</td>
</tr>
<tr>
<td>Oranges</td>
<td>$0.80</td>
</tr>
</tbody>
<tfoot>
<tr>
<td>Total</td>
<td>$1.80</td>
</tr>
</tfoot>
</table>
</body>
</html>
```
**Output:**
**HTML Table with Headers and Footers**
| Product | Price |
|-----------|--------|
| Apples | $1.00 |
| Oranges | $0.80 |
| **Total** | **$1.80** |
In this example, the table includes a header for product names and prices, a body with the product data, and a footer with the total price.
#### 4. Merging Cells
Cells can be merged using the `colspan` and `rowspan` attributes to span multiple columns or rows.
**Example: Table with Merged Cells**
```html
<!DOCTYPE html>
<html>
<head>
<title>Table with Merged Cells Example</title>
</head>
<body>
<h1>HTML Table with Merged Cells</h1>
<table border="1">
<tr>
<th>Item</th>
<th>Details</th>
</tr>
<tr>
<td rowspan="2">Fruit</td>
<td>Apples</td>
</tr>
<tr>
<td>Oranges</td>
</tr>
<tr>
<td colspan="2">Total Items: 2</td>
</tr>
</table>
</body>
</html>
```
**Output:**
**HTML Table with Merged Cells**
| Item | Details |
|-------|------------|
| Fruit | Apples |
| | Oranges |
| Total Items: 2 |
In this example, the first cell in the second row spans two rows, and the cell in the last row spans two columns.
#### Benefits of Using HTML Tables
- **Organization**: Tables provide a clear and organized way to display data.
- **Readability**: They make numerical and textual data easier to read and compare.
- **Accessibility**: Screen readers can easily interpret table structures, improving accessibility for visually impaired users.
### Conclusion
Understanding how to use HTML tables is essential for organizing and presenting tabular data effectively. Whether you're creating basic tables, adding captions, using headers and footers, or merging cells, mastering these elements will enhance the readability and usability of your web pages.
follow me on LinkedIn - https://www.linkedin.com/in/ridoy-hasan7 | ridoy_hasan |
1,910,499 | Total Madness #0: Locks | This is the first post in a series about my urges to figure out the dark magics of the computer... | 0 | 2024-07-03T18:07:16 | https://dev.to/gmelodie/total-madness-0-locks-18nc | rust, concurrency, deadlock |
This is the first post in a series about my urges to figure out the dark magics of the computer world. You see, I recently have had some free time on my hands, and I decided to spend it to scratch some itches I've had for as long as I can code (writing an [OS in Rust](https://github.com/gmelodie/cruzos), for instance). As I dove deeper into the dark magics, I discovered the truth about things I never really liked to assume are true (but did it anyways, for the sake of sanity, at the time).
I don't care anymore about sanity. Let's talk architectures, let's talk memory, let's talk concurrency until we drown in deadlocks, let's find out why there can never be an address 0x0, and yet there's always one. Those who read up beware: this is no place for the sane. Buckle up, for we're going towards Total Madness.
# Episode 0: Locks
Let's start with an easy one: Locks. Gotcha! One of the most important lessons we'll learn here is this: absolutely nothing is as easy as it locks (pun intended). But seriously now, let's reflect on what a lock is. Ignore all the textbook stuff you may or may not know and think about what a lock would look like.
**Obs:** A lock is also called a `Mutex`, short for `Mutual Exclusion`.
Here are my personal initial thoughts, they come as a gross example: two siblings want to use the toothbrush they share, but obviously only one of them can use it at a time. The childish, sibling-like thing to do is to say "I'm first!" before than the other person. The rule is simple: whoever starts saying "I'm first" first, gets to use it. Now, there would be an argument to be made about mili or even nanoseconds of difference (clearly two humans cannot tell which sibling started saying it first if the time difference is mili or nanoseconds appart). Thankfully this is not an issue with typical computers as the sentence would be an instruction running on the computer, so whichever sibling's instruction runs first wins.
Here's a simple implementation of it in Rust (you don't need to know Rust to follow up, you just need to get the general idea of the snippets which should be straightforward for anyone with some general programming experience):
```rust
struct ToothbrushLock {
locked: bool,
}
```
That's it! We only need a variable (`locked`) that says if the lock is being used, we call this `locked`, (`locked == true`) or not (`locked == false`). Now for the functionality part. In Rust we can write functions that belong to a type, in this case our struct `ToothbrushLock` like so:
```rust
impl ToothbrushLock {
fn new() -> Self {
Self { locked: false }
}
}
```
This function returns an instance of `ToothbrushLock`. We call it in our `main` function like so:
```rust
fn main() {
let mut tb_lock = ToothbrushLock::new();
}
```
We need the `mut` to tell rust that this is a mutable variable, since we'll need to change (mutate) it. In fact, let's do this now. We'll add a function to lock `ToothbrushLock`, and another function to unlock it:
```rust
impl ToothbrushLock {
fn new() -> Self {
Self { locked: false }
}
fn lock(&mut self) {
self.locked = true;
}
fn unlock(&mut self) {
self.locked = false;
}
}
```
Here's how we'd use these new functions:
```rust
fn main() {
let mut tb_lock = ToothbrushLock::new();
tb_lock.lock();
// brush teeth
tb_lock.unlock();
}
```
This time the functions take a `&mut self`, which is a mutable reference to an instance of `ToothbrushLock`, and change the `locked` variable to `true` (when `lock`ing) and to `false` (when `unlock`ing). Neat! But there's an issue with this approach. Can you spot it? *Really* try to figure it out on your own before reading on!
**Obs**: the `lock()` and `unlock()` functions can also be called `acquire()` and `release()` respectvely.
Ok, ready?
Here it is: the `lock` function doesn't check if the lock is already locked! This means that we can have this horrific case:
```rust
fn main() {
let mut tb_lock = ToothbrushLock::new();
tb_lock.lock(); // gabriel locks toothbrush
// gabriel starts brushing teeth
tb_lock.lock(); // nathan locks toothbrush
// nathan starts brushing tee- OH NOOOOOOOOOOOO
tb_lock.unlock();
}
```
**Obs**: Nathan is my brother, in case you're wondering.
This is no good! Our lock is basically doing nothing.
## Spinlocks
The idea behind the solution to this issue is what most locks do: the `lock()` function **blocks** until the lock is locked, like so:
```rust
impl ToothbrushLock {
fn new() -> Self {
Self { locked: false }
}
// updated lock function!
fn lock(&mut self) {
while self.locked == true {} // keep looping until locked is false
self.locked = true;
}
fn unlock(&mut self) {
self.locked = false;
}
}
```
This is called a **Spinlock** because it *spins* in a loop until it gets the lock, and it works really well. However, there are a couple issues with this approach, can you figure out what those are? Again, *reeeeally* try to figure it out on your own before moving on.
Let's check out our usage from before. What happens when Nathan tries to lock `tb_lock` now?
```rust
fn main() {
let mut tb_lock = ToothbrushLock::new();
tb_lock.lock(); // gabriel locks toothbrush
// gabriel starts brushing teeth
tb_lock.lock(); // nathan locks toothbrush
tb_lock.unlock();
}
```
It'll never make it after the second `tb_lock.lock() // nathan locks toothbrush`, because this `lock()` waits until `locked == false`, which it will never be since it needs `unlock` to be called, and `unlock` doesn't get called until after this `lock`. We've reached the infamous `Deadlock`! A deadlock occurs when a resource tries to `lock()` something that will never unlock. We won't go into much detail regarding deadlocks
Now you must be thinking: "Gabe, you're a moron! You just create another thread for Nathan!", and you'd be right about one of two things there. We didn't talk about threads (yet!), and so let's assume that in our current tooth brushing world there is no such thing as a thread (yet!!). Our computer can only run a single instruction at a time, which begs the question: "Then we don't need locks at all, right?". You see, just because we don't run two things at the same time it doesn't mean that our computer can't *pretend* like it does. Yes sure, our computer doesn't have threads, but you know what it does have? Interrupts!
## Interrupts: a lock's nightmare!
If you know me, you know I absolutely hate interrupts. I mean really, they're so annoying! They think they're so important with their news they think everyone can jus-
Interrupt:
> A KEY HAS BEEN PRESSED DEAL WITH IT RIGHT NOW
>
> Ass. Mr. Rude Interrupt
The above is a good example of an interrupt. An interrupt is the processor's way of letting you know that there's important priority work that needs to be handled, like a key press on a keyboard. Key presses happen very rarely (even if you type 300 words per minute, that's still very slow for the processor), and so you want to deal with them as soon as possible. Almost all I/O operations can be handled with interrupts: disk reads and writes, network packets, etc.
The way I see it, an interrupt is just like another thread, because for the running program that gets interrupted, it's like the entire interrupt happened in an infinitesimal moment in time. But what does all of this mean for our spinlocks? Let's look at an example where my aunt Fefê yanks the toothbrush off my teeth to brush my counsins' teeth. Can you see the problem here?
```rust
fn main() {
let mut tb_lock = ToothbrushLock::new();
tb_lock.lock();
// gabriel brushes teeth
// <--- INTERRUPT (Fefê)
tb_lock.unlock();
}
fn interrupt() {
tb_lock.lock();
// brush cousins' teeth...
}
```
Again we've reached a deadlock: the interrupt will never end because it's waiting for the lock to be released. However, the lock will never be released because for that to happen it needs to be unlocked by the code that was interrupted, which it'll never be because... You get the idea. How would you fix this? Again, try to think of a solution before moving on.
One thing we could do is add a function `try_lock()`, which is also very common to locks, to our `ToothbrushLock`, like so:
```rust
impl ToothbrushLock {
fn new() -> Self {
Self { locked: false }
}
fn lock(&mut self) {
while self.locked == true {}
self.locked = true;
}
fn try_lock(&mut self) -> bool {
if self.locked == true {
return false;
}
self.locked = true;
return true;
}
fn unlock(&mut self) {
self.locked = false;
}
}
```
The `try_lock()` function returns right away with a boolean value (`true` or `false`) letting the caller know whether it could or could not lock right away. Now we can rewrite our interrupt:
```rust
fn main() {
let mut tb_lock = ToothbrushLock::new();
tb_lock.lock();
// gabriel brushes teeth
// <--- INTERRUPT (Fefê)
tb_lock.unlock();
}
fn interrupt() {
if tb_lock.try_lock() {
// brush cousins' teeth...
}
}
```
Now my aunt will only brush my cousins' teeth if it can lock, and will just return otherwise (perhaps she'll try again 5 minutes from now, or look for another less gross brush). This also solves our problem with my brother from earlier:
```rust
fn main() {
let mut tb_lock = ToothbrushLock::new();
tb_lock.lock();
// brush teeth
if tb_lock.try_lock() { // nathan tries to lock toothbrush
// nathan brushes teeth
}
tb_lock.unlock();
}
```
Of course we'd need more code to have my brother and my aunt try again later if they don't get the lock, but the deadlocks are gone, which is great! However there's again another problem we've ignored. This one is a bit harder to spot, but I'll have you try to anyways, can you see it?
Ok here it is: what if...
```rust
impl ToothbrushLock {
fn new() -> Self {
Self { locked: false }
}
fn lock(&mut self) {
while self.locked == true {}
self.locked = true;
}
fn try_lock(&mut self) -> bool {
if self.locked == true {
return false;
}
// <----------------- INTERRUPT
self.locked = true;
return true;
}
fn unlock(&mut self) {
self.locked = false;
}
}
fn main() {
let mut tb_lock = ToothbrushLock::new();
if tb_lock.try_lock() { // nathan locks toothbrush
// nathan brushes teeth
}
}
```
To imagine this on our tooth brushing analogy, think about aunt Fefê's interruption like a time stopping device. So the sequence of events would be like so:
1. Nathan calls `try_lock()`.
2. Inside `try_lock()`, Nathan checks if `locked == false`, which it is.
3. At this point, after Nathan has checked the locked but right before he locks it, aunt Fefê stops time (interrupt) and calls `try_lock()` herself.
4. Inside `try_lock()`, aunt Fefê checks if `locked == false`, which it is.
5. Aunt Fefê sets `locked` to `true`.
6. The interrupt ends without `unlock`ing.
7. Nathan sets `locked` to `true` thinking it's available (which isn't, it's locked by aunt Fefê).
8. Nathan brushes tee- oh no! Two people brushing their teeth at the same time?
Of course one could say: "Well, then just make sure interrupts release all locks before they return then!", but as now professional lock designers, we can't ship our `ToothbrushLock` with a note saying "This is a great lock! However you have to be REEEEEEALLY careful wehn using it." I mean come n, we can surely better than that.
## Atomics
Do you know what an atom is? It's been a hot topic in Chemistry for a long time, and nowadays we know a lot about them: they're tiny things that make the world around us. But did you know that atoms are not *atomic*? Here's a definition of atomic:
> The smallest part of an element that can exist
We now know that what Chemistry and Physics call atoms are not really atoms, because they can be split apart, etc. But what does that have to do with locks, computers and code? In Systems Design, an *atomic* instruction is an instruction that cannot be split. You see, the issue with our `try_lock()` is that we need to check if `locked == true` and, if not, update it, all of that without being interrupted in the middle. We need this process to be *atomic*. Luckily, most modern computer architectures offer indivisible instructions to do that. On x86 (which is Intel's architecture) for instance, this instruction is called `compareAndSwap` or `compareAndExchange`. Here's the pseudocode for it in Rust:
```rust
fn compare_and_exchange(original: &mut bool, expected: bool, new: bool) -> {
if *original == expected {
*original = new;
return true;
}
return false;
}
```
**Obs**: The actual `compareAndExchange` and `compareAndSwap` instructions take integer numbers instead of booleans, but as `bool`s and `int`s are generally equivalent (booleans are usually implemented using `int`s), I've decided to use `bool`s for the sake of simplicity in this example.
This function gets two boolean values `original` and `expected` and, if they're the same, it updates `original` with the value of `new`. Here's how we'd use it:
```rust
fn compare_and_exchange(original: &mut bool, expected: bool, new: bool) {
if *original == expected {
*original = new;
}
}
fn main() {
let mut original = false;
compare_and_exchange(&mut original, false, true);
println!("{original}"); // prints "true"
}
```
Here's how our `try_lock()` would look with this function:
```rust
fn try_lock(&mut self) -> bool {
let expected = false;
let new = true;
return compare_and_exchange(&mut self.locked, expected, new);
}
```
**Obs**: in rust, we'd implement *actual* atomics using the `Atomic` types. Check out the [Appendix I](#appendix-i-atomics-in-rust) below for an actual implementation.
There's also another interesting approach for locks that allows us to entirely ditch the `try_lock` function, but I believe we've had enough madness for today. The next post will prepare us with the concepts we need to understand these locks. Then we'll move on to implement them on the third post of the series.
## Appendix I: Atomics in rust
Here's how to actually implement our locks in rust, using Atomic types:
```rust
use std::sync::atomic::{AtomicBool, Ordering};
struct ToothbrushLock {
locked: AtomicBool,
}
impl ToothbrushLock {
fn new() -> Self {
Self {
locked: AtomicBool::new(false),
}
}
fn lock(&mut self) {
while self.locked.load(Ordering::SeqCst) {}
self.locked.store(true, Ordering::SeqCst);
}
fn try_lock(&mut self) -> bool {
let expected = false;
let new = true;
match self
.locked
.compare_exchange(expected, new, Ordering::SeqCst, Ordering::SeqCst)
{
Ok(_) => return true,
Err(_) => return false,
}
}
fn unlock(&mut self) {
self.locked.store(false, Ordering::SeqCst);
}
}
fn main() {
let mut tb_lock = ToothbrushLock::new();
tb_lock.lock();
// brush teeth
if tb_lock.try_lock() { // nathan locks toothbrush
// nathan brushes teeth
}
tb_lock.unlock();
}
```
---
Thank you for reading! You can find the full source code for this episode at https://github.com/gmelodie/total-madness.
## References
- [Operating Systems: Three Easy Pieces](https://pages.cs.wisc.edu/~remzi/OSTEP/threads-locks.pdf): I should note that I intentionally tried to mimic the writing style of this book, in which you make the reader stop and think before giving the answers. Huge shoutouts!
- [Writing an OS in Rust](https://os.phil-opp.com/async-await/)
- [Atom definition (Oxford Reference)](https://www.oxfordreference.com/display/10.1093/oi/authority.20110803095432229)
| gmelodie |
1,910,463 | My Exciting Journey with HNG STAGE ONE: Automating User Management with Bash Script | I am on an interesting journey with the HNG Internship. Being on the DevOps track, my first... | 0 | 2024-07-03T18:05:47 | https://dev.to/candid/my-exciting-journey-with-hng-stage-one-automating-user-management-with-bash-script-4jhe | beginners, devops, aws, hng | I am on an interesting journey with the [HNG](https://hng.tech/) Internship. Being on the DevOps track, my first project is creating a Bash script to automate user management on a Linux server. Let's dive into the details and see how this script simplifies the task of creating and managing users and groups efficiently.
**Prerequisites:**
You need access to a Linux environment (e.g., Ubuntu).
Basic understanding of how to run scripts and manage files in a Linux terminal.
Ensure you have permissions to create users, groups, and files.
**Requirements:**
Input File Format:
The script will read a text file where each line is formatted as `username;groups`.
Example:
```bash
Esther; admin,dev
Felix; dev,tester
Peter; admin,tester
```
Script Actions:
Create users (Esther, Felix, Peter) and their personal groups (Esther, Felix, Peter).
Assign users to specified additional groups (admin, dev, tester).
Set up home directories for each user with appropriate permissions.
Generate random passwords for each user.
Log all actions to /var/log/user_management.log.
Store passwords securely in /var/secure/user_passwords.txt.
Handle errors gracefully, such as existing users or groups.
**Step 1:**
** Script Initialization and Setup**
Set up the initial environment for the script, including defining file locations and creating necessary directories.
Define File Locations: Initializes paths for logging and password storage.
Define variables for log and password file paths (LOG_FILE, PASSWORD_FILE).
Create Directories:Ensures necessary directories exist.
Ensure the directories /var/log and /var/secure exist.
Set File Permissions:Sets secure permissions for sensitive files.
Create and set permissions (600 for password file, 644 for log file) for the log and password files.
```bash
#!/bin/bash
# Ensure the log file exists
touch $LOG_FILE
chmod 644 $LOG_FILE
# Define log and password file locations
LOG_FILE="/var/log/user_management.log"
PASSWORD_FILE="/var/secure/user_passwords.txt"
# Create directories if they don't exist
mkdir -p /var/log
mkdir -p /var/secure
# Ensure the password file is secure
touch $PASSWORD_FILE
chmod 600 $PASSWORD_FILE
```
**Step 2:**
**Logging Function Creation**
Create a function to log actions performed by the script with timestamps.
Define Logging Function: log_action ensures all script activities are logged with timestamps while timestamps helps track when each action occurred for auditing and debugging purposes.
Create a function log_action that appends messages with timestamps to the log file.
```bash
# Function to log messages with timestamps
log_action() {
echo "$(date '+%Y-%m-%d %H:%M:%S') : $1" >> $LOG_FILE
}
```
**Step 3:**
**Argument Checking****
Verify that the script is provided with the correct number of arguments.
Argument Check: Ensures script execution is correctly formatted and file existence check confirms the existence of the specified user list file for further processing.
Ensure the script is executed with one argument (the user list file).
Exit with an error message if the argument count is incorrect.
```bash
# Check if correct number of arguments provided
if [ $# -ne 1 ]; then
log_action "Usage: $0 <user-list-file>. Exiting."
exit 1
fi
USER_LIST_FILE=$1
# Check if user list file exists
if [ ! -f $USER_LIST_FILE ]; then
log_action "File $USER_LIST_FILE does not exist! Exiting."
exit 1
fi
```
**Step 4:**
**Reading and Processing User List**
Read each line from the user list file, extracting usernames and associated groups.
Read File Content: Uses while loop to read and process each line in the user list file and utilizes xargs to remove leading and trailing whitespace from extracted data.
Iterate through each line in the user list file.
Extract username and associated groups from each line.
```bash
# Process each line in the user list file
while IFS=';' read -r username groups; do
username=$(echo $username | xargs)
groups=$(echo $groups | xargs)
# Further actions based on extracted data will be performed in subsequent steps.
done < $USER_LIST_FILE
```
**Step 5:**
**User Existence Checking and Creation**
Verify if each user already exists; if not, create the user.
Check User Existence:Determines if the user already exists. Skips creation if the user exists; otherwise, creates the user and logs the outcome.
Use id -u command to check if the user already has an assigned ID.
Skip user creation if the ID exists, log the action.
```bash
# Check if the user already exists
if id -u $username >/dev/null 2>&1; then
log_action "User $username already exists. Skipping."
continue
fi
# Create the user if they do not exist
useradd -m $username
if [ $? -eq 0 ]; then
log_action "User $username created successfully."
else
log_action "Failed to create user $username."
continue
fi
```
**Step 6:**
**Group Handling**
Create required groups for each user and assign them appropriately.
Process Group List: Iterates through each group associated with the user, creating any new groups as needed. Then user modification Uses usermod to assign the user to each specified group and logs the action.
Split the groups variable to handle each group associated with the user.
Create any new groups if they do not exist.
```bash
# Assign user to specified additional groups
IFS=',' read -ra USER_GROUPS <<< "$groups"
for group in "${USER_GROUPS[@]}"; do
group=$(echo $group | xargs)
if ! getent group $group >/dev/null; then
groupadd $group
if [ $? -eq 0 ]; then
log_action "Group $group created successfully."
else
log_action "Failed to create group $group."
continue
fi
fi
usermod -aG $group $username
log_action "User $username added to group $group."
done
```
**Step 7:**
**Home Directory Setup**
Ensure each user has a home directory set up with appropriate permissions.
Directory Permissions: Adjusts permissions and ownership for the user's home directory to provide appropriate access rights.
Set permissions (chmod, chown) for the user's home directory (/home/$username).
```bash
# Set up home directory permissions
chmod 755 /home/$username
chown $username:$username /home/$username
```
**Step 8:**
**Password Generation and Storage**
Generate a secure password for each user and store it securely.
Password Generation: For password security, utilize a secure method (date +%s | sha256sum | base64) to generate a random password and for storage append username and password to the password file and logs the successful password creation.
Create a randomly generated password for each user.
```bash
# Generate and store password securely
password=$(date +%s | sha256sum | base64 | head -c 12 ; echo)
echo "$username,$password" >> $PASSWORD_FILE
log_action "Password for user $username set successfully."
```
**Step 9:**
**Script Completion and Finalization**
Conclude the script execution, logging the completion of all actions.
Script Conclusion: Logs a final message confirming successful script execution, providing a clear end to the script's operations.
Add a final log entry to indicate the completion of script execution.
```bash
# Final log entry
log_action "Script execution completed."
```
Now let's put it all together
```bash
#!/bin/bash
# Step 1: Define File Locations
LOG_FILE="/var/log/user_management.log"
PASSWORD_FILE="/var/secure/user_passwords.txt"
# Step 2: Create Directories
mkdir -p /var/log
mkdir -p /var/secure
# Step 3: Set File Permissions
touch $PASSWORD_FILE
chmod 600 $PASSWORD_FILE
touch $LOG_FILE
chmod 644 $LOG_FILE
# Step 4: Define Logging Function
log_action() {
echo "$(date '+%Y-%m-%d %H:%M:%S') : $1" >> $LOG_FILE
}
# Step 5: Argument Checking
if [ $# -ne 1 ]; then
log_action "Usage: $0 <user-list-file>. Exiting."
exit 1
fi
USER_LIST_FILE=$1
if [ ! -f $USER_LIST_FILE ]; then
log_action "File $USER_LIST_FILE does not exist! Exiting."
exit 1
fi
# Step 6: Reading and Processing User List
while IFS=';' read -r username groups; do
username=$(echo $username | xargs)
groups=$(echo $groups | xargs)
# Step 7: User Existence Checking and Creation
if id -u $username >/dev/null 2>&1; then
log_action "User $username already exists. Skipping."
continue
fi
useradd -m $username
if [ $? -eq 0 ]; then
log_action "User $username created successfully."
else
log_action "Failed to create user $username."
continue
fi
# Step 8: Group Handling
IFS=',' read -ra USER_GROUPS <<< "$groups"
for group in "${USER_GROUPS[@]}"; do
group=$(echo $group | xargs)
if ! getent group $group >/dev/null; then
groupadd $group
if [ $? -eq 0 ]; then
log_action "Group $group created successfully."
else
log_action "Failed to create group $group."
continue
fi
fi
usermod -aG $group $username
log_action "User $username added to group $group."
done
# Step 9: Home Directory Setup
chmod 755 /home/$username
chown $username:$username /home/$username
log_action "Home directory permissions set for user $username."
# Step 10: Password Generation and Storage
password=$(date +%s | sha256sum | base64 | head -c 12 ; echo)
echo "$username,$password" >> $PASSWORD_FILE
log_action "Password for user $username set successfully."
done < $USER_LIST_FILE
# Step 11: Script Completion and Finalization
log_action "Script execution completed."
```
Now let’s get to the interesting part.
Save the file (create_user.sh) to github repository.
Clone to Linux server.
Ensure create_users.sh has executable permissions:
`chmod +x create_users.sh`
Create a file named user_list.txt with entries formatted as:
```bash
`username1;group1,group2
username2;group3`
```
Run the script providing the user list file as an argument:
`./create_users.sh user_list.txt`
View logs of script actions
`nano /var/log/user_management.log`
Yeaaa!!!!!!!
We have successfully created a Bash script (create_users.sh) that automates the creation of users, management of groups, and secure handling of passwords.
visit HNG Internship today at [HNG](https://hng.tech/premium) to be part of this wonderful experience.
| candid |
1,910,498 | AdGuard Home: Your ultimate protection on the internet 🧑🏼🚀 | AdGuard Home protects you from ads, tracking and malware. Learn why it's better than PiHole and how... | 0 | 2024-07-03T18:03:11 | https://blog.disane.dev/en/adguard-home-your-ultimate-protection-on-the-internet/ | adguard, dns, homelab, network | AdGuard Home protects you from ads, tracking and malware. Learn why it's better than PiHole and how to set it up! 🛡️
---
AdGuard Home is a powerful network ad blocker that provides a centralized solution for all your devices. Compared to PiHole, AdGuard Home offers some additional features and an easier installation, especially if you use Docker. In this article, you'll learn how to install AdGuard Home with Docker, what features it offers and why it's an excellent choice for your network.
## Why AdGuard Home? 🤔
AdGuard Home is a comprehensive network ad blocking solution that blocks ads and trackers on all devices in your network. Here are some reasons why AdGuard Home is better than PiHole:
[AdGuard Home | Network-wide application for all operating systems: Windows, MacOS, LinuxAdGuard Home is a network-wide ad blocking and tracking software. Once you set it up, it covers ALL your home devices, and you don't need any client-side software to do it.](https://adguard.com/de/adguard-home/overview.html)
### Additional features
* **DNSSEC**: AdGuard Home supports DNSSEC, which provides additional security by ensuring that DNS responses have not been tampered with.
* **User-friendly interface**: AdGuard Home offers a more modern and user-friendly interface compared to PiHole.
* **Integration of AdGuard filters**: It seamlessly integrates the powerful AdGuard filter lists, which are known for their high efficiency.
* **Customizable DNS settings**: AdGuard Home allows you to configure different DNS servers for different domains.
* **Mobile app**: With the help of the mobile app, you can always check the status and temporarily deactivate the protection
## Installing AdGuard Home with Docker 🐳
Installing AdGuard Home with Docker is quick and easy. Here is a step-by-step guide on how to set up AdGuard Home on your server:
### Preparation
Make sure that Docker is installed on your system. If not, you can install Docker using the official Docker installation instructions.
### Create Docker-Compose file
Create a `docker-compose.yml` file with the following content:
```yaml
version: '3'
services:
adguardhome:
container_name: adguardhome
image: adguard/adguardhome
restart: unless-stopped
ports:
- "53:53/tcp"
- "53:53/udp"
- "67:67/udp"
- "80:80/tcp"
- "443:443/tcp"
- "3000:3000/tcp"
volumes:
- "./data/work:/opt/adguardhome/work"
- "./data/conf:/opt/adguardhome/conf"
```
If necessary, adjust the directories to match your Docker host so that the files remain even after a restart.
### Start container
Execute the following commands to start the container:
```bash
mkdir -p data/work data/conf
docker-compose up -d
```
That's it! AdGuard Home is now running on your server and can be accessed via the IP address of your server.
## Configure AdGuard Home 🛠️
After installation, you can configure AdGuard Home via the web interface. The default address is `http://deine-server-ip:3000`. The interface is nicely structured and you should find everything at a glance:
The mobile app is also very nicely designed and everything is very easy to access:
This app is probably available in the App Store as well as the Play Store:
[AdGuard Home RemoteAdGuard Home Remote makes managing your AdGuard Home quick and easy. Quickly enable and disable filtering features, and view statistics such as top clients and top domains. Manage your clients, filters, DNS rewrites and much more. \*Check filters\*...](https://apps.apple.com/en/app/adguard-home-remote/id1543143740)
[AdGuard Home Manager - Apps on Google PlayManage your AdGuard Home Server from your mobile device](https://play.google.com/store/apps/details?id=com.jgeek00.adguard%5Fhome%5Fmanager&hl=gsw&pli=1)
### Features and settings
#### Enable DNSSEC 🔒
DNSSEC (Domain Name System Security Extensions) ensures that the responses to DNS queries are authenticated, that the responses to DNS queries are authenticated. To activate DNSSEC, go to the settings and activate the "DNSSEC" option.
#### Customizable filter lists 📋
AdGuard Home allows you to use and customize various filter lists. You can manage these in the settings under "Filter lists". Here you can add or remove filters or create your own filters.
#### Parental controls and safe search 👶🔍
AdGuard Home also allows you to set up parental controls and enable safe search options to ensure that content is safe for children. These options can be found in the settings under "Parental Controls".
### Network settings for AdGuard Home
In order for AdGuard Home to work on all devices in your network, you need to change the DNS settings in your router. Here is a general guide on how to do this:
1. **Log in**: Log in to the web interface of your router. You can usually find the address in your router's manual or on the back of the device.
2. **Change DNS server**: Search for the DNS server settings. These are usually located under the LAN or DHCP settings.
3. **Enter AdGuard Home IP address**: Enter the IP address of the server on which AdGuard Home is running and save the settings.
Now all DNS requests in your network are routed via AdGuard Home, and ads and trackers are effectively blocked.
## Conclusion 🎉
AdGuard Home is a powerful and user-friendly alternative to PiHole. With features like DNSSEC, customizable filter lists and easy Docker installation, it's the ideal choice for anyone who wants to protect their network from ads and trackers.
### What do you think? 🤔
Do you have any questions or comments about AdGuard Home? Share your thoughts in the comments below and let's discuss how we can make our network even safer!
---
If you like my posts, it would be nice if you follow my [Blog](https://blog.disane.dev) for more tech stuff. | disane |
1,910,496 | AdGuard Home: Dein ultimativer Schutz im Internet 🧑🏼🚀 | AdGuard Home schützt Dich vor Werbung, Tracking und Malware. Erfahre, warum es besser als PiHole ist... | 0 | 2024-07-03T18:00:47 | https://blog.disane.dev/adguard-home-ad-blocker-fur-alle-gerate-im-netzwerk/ | adguard, dns, homelab, netzwerk | AdGuard Home schützt Dich vor Werbung, Tracking und Malware. Erfahre, warum es besser als PiHole ist und wie Du es einrichtest! 🛡️
---
AdGuard Home ist ein leistungsstarker Netzwerk-Werbeblocker, der eine zentrale Lösung für all Deine Geräte bietet. Im Vergleich zu PiHole bietet AdGuard Home einige zusätzliche Features und eine einfachere Installation, vor allem wenn Du Docker verwendest. In diesem Artikel erfährst Du, wie Du AdGuard Home mit Docker installierst, welche Features es bietet und warum es eine hervorragende Wahl für Dein Netzwerk ist.
## Warum AdGuard Home? 🤔
AdGuard Home ist eine umfassende Netzwerk-Werbeblocker-Lösung, die Werbung und Tracker auf allen Geräten in Deinem Netzwerk blockiert. Hier sind einige Gründe, warum AdGuard Home besser ist als PiHole:
[AdGuard Home | Netzwerkweite Anwendung für alle Betriebssysteme: Windows, MacOS, LinuxAdGuard Home ist eine netzwerkweite Software zum Sperren von Werbung und Tracking. Nachdem Sie es eingerichtet haben, deckt es ALLE Ihre Heimgeräte ab, und Sie benötigen dafür keine clientseitige Software.](https://adguard.com/de/adguard-home/overview.html)
### Zusätzliche Features
* **DNSSEC**: AdGuard Home unterstützt DNSSEC, was für zusätzliche Sicherheit sorgt, indem es sicherstellt, dass die DNS-Antworten nicht manipuliert wurden.
* **Benutzerfreundliche Oberfläche**: AdGuard Home bietet eine modernere und benutzerfreundlichere Oberfläche im Vergleich zu PiHole.
* **Integration von AdGuard-Filtern**: Es integriert nahtlos die leistungsstarken AdGuard-Filterlisten, die für ihre hohe Effizienz bekannt sind.
* **Anpassbare DNS-Einstellungen**: AdGuard Home erlaubt es Dir, verschiedene DNS-Server für unterschiedliche Domains zu konfigurieren.
* **Mobile App**: Mit Hilfe der mobilen App kannst du immer den status prüfen und den Schutz kurzzeitig deaktivieren
## Installation von AdGuard Home mit Docker 🐳
Die Installation von AdGuard Home mit Docker ist einfach und schnell. Hier ist eine Schritt-für-Schritt-Anleitung, wie Du AdGuard Home auf Deinem Server einrichtest:
### Vorbereitung
Stelle sicher, dass Docker auf Deinem System installiert ist. Falls nicht, kannst Du Docker über die offiziellen Docker-Installationsanleitungen installieren.
### Docker-Compose Datei erstellen
Erstelle eine `docker-compose.yml` Datei mit folgendem Inhalt:
```yaml
version: '3'
services:
adguardhome:
container_name: adguardhome
image: adguard/adguardhome
restart: unless-stopped
ports:
- "53:53/tcp"
- "53:53/udp"
- "67:67/udp"
- "80:80/tcp"
- "443:443/tcp"
- "3000:3000/tcp"
volumes:
- "./data/work:/opt/adguardhome/work"
- "./data/conf:/opt/adguardhome/conf"
```
Gegebenenfalls musst du die Verzeichnisse so anpassen, dass sie zu deinem Docker-Host passen, so dass die Dateien auch nach einem Neustart bestehen bleiben.
### Container starten
Führe folgende Befehle aus, um den Container zu starten:
```bash
mkdir -p data/work data/conf
docker-compose up -d
```
Das war's! AdGuard Home läuft nun auf Deinem Server und ist über die IP-Adresse Deines Servers erreichbar.
## AdGuard Home konfigurieren 🛠️
Nach der Installation kannst Du AdGuard Home über die Weboberfläche konfigurieren. Die Standardadresse ist `http://deine-server-ip:3000`. Die Oberfläche ist schön strukturiert und du solltest alles auf einem Blick finden:
Auch die mobile App ist sehr schön aufgebaut und alles ist sehr gut zu erreichen:
Diese App gibt's wohl im App- als auch im Play-Store:
[AdGuard Home RemoteAdGuard Home Remote macht die Verwaltung Deines AdGuard Home schnell und einfach. Aktivieren und deaktivieren Sie schnell die Filterfunktionen, und sehe Dir Statistiken wie die Top-Clients und Top-Domains an. Verwalte Deine Clients, Filter, DNS-Umschreibungen und vieles mehr. \*Filter kontrollieren\*…](https://apps.apple.com/de/app/adguard-home-remote/id1543143740)
[AdGuard Home Manager – Apps bei Google PlayManage your AdGuard Home Server from your mobile device](https://play.google.com/store/apps/details?id=com.jgeek00.adguard%5Fhome%5Fmanager&hl=gsw&pli=1)
### Features und Einstellungen
#### DNSSEC aktivieren 🔒
DNSSEC (Domain Name System Security Extensions) sorgt dafür, dass die Antworten auf DNS-Abfragen authentifiziert sind. Um DNSSEC zu aktivieren, gehe zu den Einstellungen und aktiviere die Option „DNSSEC“.
#### Anpassbare Filterlisten 📋
AdGuard Home ermöglicht die Verwendung und Anpassung verschiedener Filterlisten. Du kannst diese in den Einstellungen unter „Filterlisten“ verwalten. Hier kannst Du Filter hinzufügen, entfernen oder eigene Filter erstellen.
#### Elternkontrolle und sichere Suche 👶🔍
Mit AdGuard Home kannst Du auch Elternkontrollen einrichten und sichere Suchoptionen aktivieren, um sicherzustellen, dass Inhalte für Kinder sicher sind. Diese Optionen findest Du in den Einstellungen unter „Elternkontrolle“.
### Netzwerk-Einstellungen für AdGuard Home
Damit AdGuard Home auf allen Geräten in Deinem Netzwerk funktioniert, musst Du die DNS-Einstellungen in Deinem Router ändern. Hier ist eine allgemeine Anleitung, wie Du dies tun kannst:
1. **Anmelden**: Melde Dich bei der Weboberfläche Deines Routers an. Die Adresse findest Du in der Regel im Handbuch Deines Routers oder auf der Rückseite des Geräts.
2. **DNS-Server ändern**: Suche die DNS-Server-Einstellungen. Diese befinden sich meistens unter den LAN- oder DHCP-Einstellungen.
3. **AdGuard Home IP-Adresse eintragen**: Trage die IP-Adresse des Servers ein, auf dem AdGuard Home läuft, und speichere die Einstellungen.
Nun werden alle DNS-Anfragen in Deinem Netzwerk über AdGuard Home geleitet, und Werbung sowie Tracker werden effektiv blockiert.
## Fazit 🎉
AdGuard Home ist eine leistungsstarke und benutzerfreundliche Alternative zu PiHole. Mit Features wie DNSSEC, benutzerdefinierbaren Filterlisten und einfacher Docker-Installation ist es die ideale Wahl für alle, die ihr Netzwerk vor Werbung und Trackern schützen möchten.
### Was denkst Du? 🤔
Hast Du Fragen oder Anmerkungen zu AdGuard Home? Teile Deine Gedanken in den Kommentaren unten mit und lass uns darüber diskutieren, wie wir unser Netzwerk noch sicherer machen können!
---
If you like my posts, it would be nice if you follow my [Blog](https://blog.disane.dev) for more tech stuff. | disane |
1,910,494 | Free Resources for Aspiring Programmers and Beyond | So, as an aspiring coder, it has been quite a journey. My background is in art and nutrition. I'm... | 0 | 2024-07-03T17:59:26 | https://dev.to/annavi11arrea1/free-resources-for-aspiring-programmers-and-beyond-21jo | beginners, programming, learning | So, as an aspiring coder, it has been quite a journey. My background is in art and nutrition. I'm going to share the things i've discovered along the way as a non-traditional coder.
----------------------------> :) <-------------------------------
## Online Resources
----------------------------> :) <-------------------------------
**0(1) Software Network**
In my search for groups and social networking strictly related to programming, I discovered a really awesome group on meetup. They invite members of all skill levels to share their projects and invite others to join.
- Watch others code live
- Contribute to discussions
- Make suggestions/offer advice/ask for help
- Join projects that interest you
- Pitch your own project to the group
- Find collaborators
- Make new friends
Your code of choice and skill level are not factors, all are welcome. It's super awesome to work along side others with different skills. There is so much interesting stuff to learn. You will be invited to the Discord server upon signing up.
Here is the link to the Meetup if you are interested in joining this really awesome group of individuals:
[0(1) Software Network](https://www.meetup.com/central-connecticut-coders/)
---
**Coursera**
Starting out, I wanted to get some certificates to prove my abilities and understanding of programming. We all have to start somewhere, this is where I started. After spending some time on Coursera, I ultimately enrolled in Coursera plus. (which is paid) But they of course have 7-day free trial so you can see if you like the other courses that are paid.
But you can check out some of their free stuff here:
[Check out Coursera for free](https://www.coursera.org/collections/popular-free-courses)
---
**Udemy**
Online learning that also offers a free 7-day trial. I'm currently working on the 100 days of python with Angela, the course is very personable and easy to follow. Much more like a classroom feel and less cut and dry, if you like that format. I'm currently on day 4 and have no complaints! Check out their website, here is the link:
[Udemy Home Page](https://www.udemy.com/personal/home)
Or if you want to hop on the python train here is that link:
[100 Days of Python](https://www.udemy.com/course/100-days-of-code/)
----------------------------> :) <-------------------------------
## Stepping Stones for Beginners
----------------------------> :) <-------------------------------
Trying to get your foot in the door? So am I. What's really awesome is if you do enough digging you can find some fabulous programs run by your local community. I'm going to share some from the Chicago are since that's my home base. But if you live within an hour of any kind of metropolitan area i'm sure you kind find similar program!
In Will County, Illinois you may qualify for a scholarship in a full-stack program. I was accepted into the program but because of other commitments at that time I couldn't do it. But it's a fully paid scholarship that helps you land your first job at the end. There is a good chance you are not from Will County, IL, but take a look and see how you might search for something like this in your community related to tech and development!
[Jobs4people](https://jobs4people.org/Job-Seekers/Career-Scholarships-Training)
Related pamphlet:
https://issuu.com/workforceinvestmentboardwc/docs/exploring_proit_careers?fr=sMmMwMTIwMjAzMjY)
You may want to search "workforce development pathways" or a similar term in your location.
---
**Discover Parters Institute**
Try applying for this Chicago-based paid apprenticeship! No experience or degree required, but it would help your odds of getting picked. You complete some pre-apprenticeship activities to qualify for the interview, and it is a very step-by-step process.
[DPI Full-Stack Developer Apprenticeship](https://dpi.uillinois.edu/tech-talent-development/apprenticeship/)
This program is supported by the mayor of Chicago, Gov. Pritzker, and the University of Illinois.
Here is some cool information about the future of DPI!
[New Building at the Innovation District](https://www.78chicago.com/explore/discovery-partners-institute)
----------------------------> :) <-------------------------------
## Fun and exciting things to try!
----------------------------> :) <-------------------------------
When I got a handle on CSS, I had a new found appreciation for it, especially being a creative person. Here are some fun places to poke around with CSS code:
**Codepen**
- Play with others code and manipulate graphics
- Lots of free references for styling
- View the code to have an understanding
- Upload and share your own fun code
[Codepen](https://codepen.io/)
---
**iCodeThis**
Challenge yourself with CSS with fun challenges!
[iCodeThis](https://icodethis.com/)
---
**CSSBattle**
Recreate the CSS graphic with the least lines of code to get a top score!
[CSSBattle](https://cssbattle.dev/)
---
**THREE.js**
So, if you are a creative like me, you are going to fall in love with THREE.js, probably. You can create 3D animated environments with code. Pretty freaking cool.
If you are a coding ninja or are feeling capable, you can probably just follow the documentation to learn the framework for free.
However, if you are like me and just starting out they do have a very thorough paid class you can take! If you take a look at some of the completed projects on the landing page, it doesn't take long to become excited about it!
[THREE.js Landing page](https://threejs.org/docs/index.html#manual/en/introduction/Creating-a-scene)
You can check out the content that will be covered in their program and the first three classes are also free!
[THREE.js Lessons](https://threejs-journey.com/)
_Hope to meet some of you in our group, and if not hopefully some of you can find this guide helpful. This was my personal journey and everyones is different. I wish you the best in your coding endeavors. <3_ Anna
| annavi11arrea1 |
1,910,493 | How to connect to a SQL Server database | Working with multiple databases is quick and easy with dbForge Studio for SQL Server, a feature-rich... | 0 | 2024-07-03T17:54:55 | https://dev.to/devartteam/how-to-connect-to-a-sql-server-database-5c3n | sql, sqlserver, devart, dbforge | Working with multiple databases is quick and easy with dbForge Studio for SQL Server, a feature-rich Integrated Development Environment (IDE) for SQL Server and Azure SQL databases. Its capabilities make it simple to connect to databases using a variety of authentication techniques and to manage existing connections effectively.
Learn more: https://www.devart.com/dbforge/sql/studio/connecting-to-sql-server-database.html
| devartteam |
1,910,487 | T-Shirt manufacturer in ludhiana | Nestled in the vibrant industrial hub of Ludhiana, our T-shirt manufacturing in Ludhiana, company... | 0 | 2024-07-03T17:49:14 | https://dev.to/tshirt_manufacturer_7d51b/t-shirt-manufacturer-in-ludhiana-m5f |
Nestled in the vibrant industrial hub of Ludhiana, our T-shirt manufacturing in Ludhiana, company prides itself on blending quality craftsmanship with innovative design. Leveraging state-of-the-art technology and a skilled workforce, we produce an array of T-shirts that cater to diverse styles and preferences. Our commitment to excellence is reflected in the superior fabric, impeccable stitching, and enduring comfort of each garment. With a focus on sustainability and ethical production practices, we aim to set new standards in the textile industry, ensuring our customers receive nothing but the best. Whether you're looking for casual everyday wear or custom-branded apparel, our Ludhiana-based manufacturing facility is equipped to meet all your T-shirt needs. T-shirt manufacturer in Ludhiana.
https://posts.gle/1qNbPi
https://vaibhavadventure.com/collar-tshirt-manufacturer.html
https://g.page/r/Cf9n3VKORQTrEBM | tshirt_manufacturer_7d51b |
|
1,910,490 | Heat.js - Generate customizable heat maps, charts, and statistics to visualize date-based activity and trends | Hello! This is my latest project that I'm trying to spread the word on. This has been rewritten in... | 0 | 2024-07-03T17:54:34 | https://dev.to/williamtroup/heatjs-generate-customizable-heat-maps-charts-and-statistics-to-visualize-date-based-activity-and-trends-2f4c | Hello!
This is my latest project that I'm trying to spread the word on. This has been rewritten in TypeScript to allow greater integration support with React, Angular, and other libraries!
Website:
https://william-troup.com/heat-js/
Repository!
https://github.com/williamtroup/Heat.js | williamtroup |
|
1,910,492 | Creating a Markdown Editor in your react projects | 👋 If you're looking to add a user-friendly markdown editor to your React project, you're in luck.... | 0 | 2024-07-03T17:54:32 | https://dev.to/promathieuthiry/creating-a-markdown-editor-with-uiwreact-md-editor-5foe | markdown, react, tutorial | 👋 If you're looking to add a user-friendly markdown editor to your React project, you're in luck. We'll be diving into [@uiw/react-md-editor](https://www.npmjs.com/package/@uiw/react-md-editor), a powerful library that simplifies the creation of markdown editors. By the end of this post, we'll have recreated a markdown editor similar to the one you use when writing comments on GitHub pull requests!
## Why pick @uiw/react-md-editor?
`@uiw/react-md-editor` is a library that gives you a fully-featured markdown editor out of the box. It's ideal for scenarios where you need to provide users with a straightforward way to enter and format text, such as in comment sections.
Some cool features include:
- 📝 Live, preview and diff mode
- 🎨 Customizable toolbar with your own styles
## Getting Started
First things first, let's install the package:
```bash
npm install @uiw/react-md-editor
# or
yarn add @uiw/react-md-editor
```
Now, let's create a basic markdown editor in a React component:
```tsx
import React, { useState } from "react";
import MDEditor from "@uiw/react-md-editor";
const MarkdownEditor: React.FC = () => {
const [value, setValue] = useState("**Hello world!!!**");
return (
<div className="container">
<MDEditor value={value} onChange={(val) => setValue(val || "")} />
</div>
);
};
export default MarkdownEditor;
```
Just like that, you've got a functional markdown editor! 🎉
## Customizing Your Editor
Want to add or remove toolbar items? Here's how you can customize the toolbar:
```tsx
import React, { useState } from "react";
import MDEditor, { commands } from "@uiw/react-md-editor";
const CustomEditor: React.FC = () => {
const [value, setValue] = useState("# Your custom markdown here");
return (
<MDEditor
value={value}
onChange={(val) => setValue(val || "")}
commands={[
commands.bold,
commands.italic,
commands.link,
// Add or remove commands as needed
]}
/>
);
};
export default MarkdownEditor;
```
Want to add your own icons ? You can do that too. Here's an example with a custom bold command:
```tsx
import { BoldIcon } from "../../assets/BoldIcon";
const customBoldCommand = {
...commands.bold,
icon: <BoldIcon />,
};
return (
<MDEditor
value={value}
onChange={(val) => setValue(val || "")}
commands={[customBoldCommand, commands.italic, commands.link]}
/>
);
```
Want to use text instead of icons ? Want to have access to the current mode (edit or preview) and change it programmatically ? First you need to create the component that will be used as a button in the toolbar:
```tsx
const PreviewButton = () => {
const { preview, dispatch } = useContext(EditorContext);
const click = () => {
if (dispatch) {
dispatch({
preview: "preview",
});
}
};
return <button onClick={click}>Preview</button>;
};
```
This component represents the "Preview" tab in a dual-mode markdown editor, mimicking the interface you'd find when commenting on GitHub. It allows users to switch between composing markdown ("Write" mode) and viewing the formatted result ("Preview" mode).
The component uses React's `useContext` hook to access `preview` and `dispatch` from an `EditorContext`. It defines a click function that dispatches an action to set the preview state to "preview" when the button is clicked.
After creating your custom button component, you can incorporate it into an object that defines a new preview command for the markdown editor. This object structure allows you to seamlessly integrate your custom functionality into the editor's toolbar.
```tsx
const customPreviewCommand = {
name: "custom-preview",
keyCommand: "custom-preview",
buttonProps: { "aria-label": "Generate Preview" },
icon: <PreviewButton />,
};
return (
<MDEditor
value={value}
onChange={(val) => setValue(val || "")}
commands={[
customBoldCommand,
commands.italic,
commands.link,
customPreviewCommand,
]}
/>
);
```
## Wrapping Up
`@uiw/react-md-editor` is a fantastic library that can save you tons of time when implementing markdown editors in your React projects. Whether you're building a blog platform, a documentation site, or just need a simple way to handle formatted text input, this library has got you covered.
Have you used `@uiw/react-md-editor` in your projects? Drop a comment below. The repo is [here](https://github.com/promathieuthiry/tutorials/tree/main/markdown_editor) and the live website [here](https://reactmarkdowneditor-mathieus-projects-05c34cfb.vercel.app/).
Happy coding 👨💻👩💻
| promathieuthiry |
1,910,491 | React.js Essentials: Your Roadmap to Entry-Level Proficiency | After six years of coding, gaining experience in developing and designing software systems, and... | 0 | 2024-07-03T17:54:21 | https://dev.to/muhammad_khalilzadeh/reactjs-essentials-your-roadmap-to-entry-level-proficiency-3gcp | react, frontend, javascript, typescript | After six years of coding, gaining experience in developing and designing software systems, and navigating a wide range of challenges, from starting at ground zero to assisting senior developers and even experiencing two failed attempts at creating my own startup companies, I found myself circling back to a junior level. This return allowed me to build a strong and standardized skill set, forming a solid backbone for my journey in the vast ocean of software programming. Throughout this time, I’ve had the opportunity to work with various technologies, explore different stacks, and delve into multiple programming languages and frameworks within professional projects.
Despite these exciting experiences, my current role at BlueWave Labs has been truly rewarding. The amazing team and colleagues I work with have contributed significantly to my growth, and I’ve learned a great deal about software engineering. As a React.js developer, I recently pondered how I could assist someone starting their journey from scratch. What essential skills and knowledge should be on their checklist to achieve entry-level proficiency in React.js?
Here’s what you’ll need to learn as an aspiring React.js entry-level software developer:
## JavaScript Fundamentals
**Variables, Data Types, Loops, and Conditionals:**
- Understand how to declare and use variables.
- Learn about different data types (strings, numbers, booleans, etc.).
- Explore loops (such as for and while) for repetitive tasks.
- Master conditional statements (if, else, switch) for decision-making.
**Functions and Scope:**
- Grasp the concept of functions as reusable blocks of code.
- Understand function parameters, return values, and scope (local vs. global).
## React Basics
**React Components:**
- Dive into functional components (stateless) and class-based components (stateful).
- Learn how to create, render, and use components.
**JSX (JavaScript XML):**
- Comprehend JSX syntax, which allows embedding HTML-like elements within JavaScript code.
- Understand how JSX translates to React elements.
## TypeScript Basics
**Type Annotations and Interfaces:**
- Explore TypeScript’s static type system.
- Annotate variables, function parameters, and return types with specific types.
- Define interfaces to describe object shapes and contracts.
## DOM Manipulation
**Selecting and Modifying Elements:**
- Use JavaScript to interact with the Document Object Model (DOM).
- Select elements by ID, class, or tag name.
- Modify element properties (e.g., changing text content, adding/removing classes).
## State Management
**React State and Props:**
- Understand the concept of state within React components.
- Learn how to manage state using useState.
- Explore props (properties) passed from parent to child components.
## Routing
**React Router:**
- Implement basic routing in a React application.
- Set up routes for different views or pages.
- Handle navigation between routes.
## Working with Git and Figma
**Git:**
- Learn version control using Git (commits, branches, merges).
- Collaborate with other developers using Git repositories.
**Figma:**
- Familiarize yourself with Figma, a design and prototyping tool.
- Understand how to create and share UI/UX designs.
Remember that continuous practice, building small projects, and exploring real-world scenarios will reinforce these skills. Happy coding! 😊
_Note: this is just a simple list in my opinion for an absolute beginner. Feel free to add yours in the comment section to complete the list._ | muhammad_khalilzadeh |
1,909,101 | Como integrar ASP.NET + ChatGPT | Olá. Neste artigo, vamos ver como podemos conectar uma API em Asp.NET Core com a API do... | 0 | 2024-07-03T17:51:18 | https://dev.to/danilosilva/como-integrar-aspnet-chatgpt-4hha | csharp, chatgpt, braziliandevs, mongodb | Olá. Neste artigo, vamos ver como podemos conectar uma API em Asp.NET Core com a API do ChatGPT.
- [Introdução](#introducao)
- [Cenário da Aplicação](#cenario)
- [Obtendo uma chave de API](#chaveapi)
- [Funcionamento da API do ChatGPT](#funcionamentoapi)
- [Criando DTOs](#dtos)
- [Criando o serviço](#servico)
- [Criando a controller](#controller)
- [Testando a aplicação](#testando)
- [Conclusão](#conclusao)
##<a name="introducao"></a> Introdução
Todos os modelos de IA generativas que estão operando de maneira madura, ou seja, possuem algum site ou interface para que as pessoas possam fazer uso de seus modelos, costumar ter algum tipo de driver, SDK ou framework para conexão com diversas linguagens. O C# não foge disso, mas, fazer uso da API desses modelos pode ser ainda mais simples.
Vamos ver como fazer isso, mas não apenas fazer uma conexão simples, e sim com um exemplo prático de interação com a base de dados.
##<a name="cenario"></a> Cenário da Aplicação
Para ilustrar um uso dessa API, vamos criar um cenário de um e-commerce de uma grande loja de variedades. Imagine um site onde você possa pedir sugestões de presentes para um determinado público. Uma conexão direta com o ChatGPT facilmente poderia fazer isso, mas, você não deseja que a resposta encaminhe seu usuário para outro site ou sugira um produto que você não venda. Não seria intuitivo.
Talvez, clonar e trabalhar no seu próprio modelo de IA iria resolver isso, mas vamos buscar uma abordagem mais simples.
Vamos trabalhar com uma API simples com arquitetura em camadas, trabalhando apenas com uma única tabela chamada `Categories`, para armazenar as categorias de produtos que temos no site. Iremos utilizar o `mongodb`, por ser mais leve para você clonar o projeto e rodar.
[Projeto inicial](https://github.com/Danilo-Oliveira-Silva/dotnet-gpt/tree/initial)
Você pode clonar essa versão inicial e subir um container com o comando:
```shell
docker compose up -d --build
```
E então rodar o projeto com o comando:
```shell
dotnet run
```
Você poderá então acessar o endereço na rota `GET /categories` e conferir as informações do banco. Este projeto possui um arquivo `mongo-init.js` para carregar o `mongodb` com algumas categorias de produtos.
Portanto, vamos utilizar essas categorias para personalizar a resposta que o ChatGPT pode nos entregar.
##<a name="chaveapi"></a> Obtendo uma chave de API
Quanto à conexão com ChatGPT, entenda que o mesmo é pago e solicita uma chave de API. Você pode carregar um saldo mínimo para fazer uso ou verificar se a sua conta possui um saldo de demonstração. Para isso:
1 - Acesse o endereço da [Plataforma da OpenAI](https://platform.openai.com) e clique em `Log in` ou `Sign up`
2 - Faça login com a sua forma desejada
3 - Clique no canto superior direito, então em `Your Profile`. Após isso, você verá uma página similar à imagem. Então clique na aba `User API Keys`.
4 - Atualmente, o ChatGPT está retirando as chaves de APIs associadas a usuários e solicitando a criação de chaves associadas a projetos. Portanto, clique em `View project API keys`.
5 - Nesta tela, clique no canto superior direito em `Create new secret key`. Uma janela modal irá aparecer, onde você pode dar um nome para sua chave e então clicar em `Create secret key`.
6 - A janela será atualizada agora mostrando a sua chave de API. Clique no botão `Copy` e cole a sua chave em algum editor.
⚠️ Essa é a única vez onde você terá acesso à chave pelo site da OpenAI. Portanto, é extremamente importante salvar em um local seguro.
##<a name="funcionamentoapi"></a> Funcionamento da API do ChatGPT
Para fazer com que nosso projeto faça chamadas na API do ChatGPT, devemos verificar o seu funcionamento na [documentação oficial](https://platform.openai.com/docs/api-reference/introduction), mas podemos simplificar a explicação.
Para o uso de modelos de texto, a chamada mais básica deverá ser:
`/POST` https://api.openai.com/v1/chat/completions
```json
{
"model": "gpt-4",
"messages": []
}
```
Onde `model` indica o modelo de gpt a ser utilizado e `messages` é um array de mensagens a serem enviadas. As mensagens seguem o seguinte objeto:
```json
{
"role": "user",
"content": "Olá ia. Como vai?"
}
```
Dentre essas mensagens, o atributo `role` indica o papel da pessoa autora daquela mensagem, tal como se fosse uma conversa. Dentre deste atributo, iremos preenchê-lo com 03 tipos:
- `user`: essa role representa a pessoa que está perguntando ao chatgpt. Logo, quando utilizamos o mesmo, estamos assumindo o papel de user.
- `assistant`: essa role representa as mensagens do ChatGPT, ou seja, as suas criações.
- `system`: essa role representa a pessoa desenvolvedora que irá dar instruções para o modelo e alterar o tom da conversa.
Portanto, se fizermos, por exemplo, uma requisição com o seguinte corpo:
```json
{
"model": "gpt-4",
"messages": [
{
"role": "system",
"content": "Crie respostas curtas"
},
{
"role": "user",
"content": "Olá ia. Como vai?"
}
]
}
```
Obteremos uma resposta no seguinte formato:
```json
{
"id": "chatcmpl-9g...",
"object": "chat.completion",
"created": 1719955224,
"model": "gpt-4-0613",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "Olá! Estou funcionando perfeitamente. Como posso ajudar você hoje?"
},
"logprobs": null,
"finish_reason": "stop"
}
],
"usage": {
"prompt_tokens": 25,
"completion_tokens": 19,
"total_tokens": 44
},
"system_fingerprint": null
}
```
Se analisarmos o objeto de retorno, temos um json com uma chave chamada `choices` que receberá um array de mensagens. Esse array, para as chamadas simples que iremos fazer, irão retornar um objeto apenas. Esse objeto terá uma chave `message` com a `role: assistant` e um `content` com a nossa mensagem. Entender o formato desse `json` é essencial para o código.
##<a name="dtos"></a> Criando DTOs
Iremos criar DTOs para representar a request e a response na API do ChatGPT.
```csharp
namespace dotnet_gpt.DTO;
public class RequestGPT
{
public string? model { get; set; }
public List<RequestGPTMessage>? messages { get; set; }
}
public class RequestGPTMessage
{
public string? role { get; set; }
public string? content { get; set; }
}
```
A classe `RequestGPT` terá os atributos de `model` e `messages` para o primeiro nível do `json`. Já o atributo `messages` será uma coleção de um segundo DTO chamado `RequestGPTMessage` que terá o formato do objeto de cada mensagem.
Além disso, iremos criar DTOs para representar o futuro funcionamento da nossa API. No corpo de requisição, teremos um `json` com um único atributo chamado `message` enquanto a resposta será a mesma `message` do ChatGPT mais a categoria de produto do nosso banco de dados recomendada.
```csharp
public record AdviceRequest
{
public string? message { get; set; }
}
```
```csharp
public record AdviceReponse : AdviceRequest
{
public Category? Category { get; set; }
}
```
## <a name="servico"></a> Criando o serviço
Iremos agora criar um serviço capaz de realizar chamadas HTTP. Mas para podermos trabalhar com os objetos `json` com mais facilidade e realizar a requisição, iremos instalar algumas dependências com os comandos:
```shell
dotnet add package Newtonsoft.Json
dotnet add package System.Net.Http
```
Ou qualquer outra forma de instalar dependências pelo Nuget.
Nosso próximo passo será criar uma classe chamada `IAService` que irá receber a camada `repository` e o objeto `HttpClient` (responsável pela chamada na API do ChatGPT)
```csharp
public class IAService
{
protected readonly HttpClient _client;
private readonly ICategoryRepository _categoryRepository;
public IAService(ICategoryRepository categoryRepository, HttpClient client)
{
_categoryRepository = categoryRepository;
_client = client;
}
}
```
Além disso, iremos criar uma variável para armazenar o token.
```csharp
private string token = "seu-token-jwt";
```
Para facilitar, estamos colocando o token em uma string hard-coded mas em sua aplicação, você pode decidir entre variáveis de ambiente ou configurações do `appsettings.json`.
Iremos criar um método assíncrono para receber a request do corpo de requisição e retornar o corpo de response.
```csharp
public async Task<AdviceReponse> GetAdvice(AdviceRequest request)
{
}
```
Neste método, iremos começar buscando os nomes das categorias da camada `repository` e concatenar em uma mesma string. Usaremos essa string para informar ao ChatGPT, quais são as categorias de produtos existentes em nossa loja.
```csharp
public async Task<AdviceReponse> GetAdvice(AdviceRequest request)
{
List<Category> categories = _categoryRepository.GetCategories();
string categoriesNames = "";
foreach(var category in categories)
{
categoriesNames += category.Name + ", ";
}
}
```
Então podemos criar um objeto com o corpo de requisição para a API da OpenAI.
```csharp
RequestGPT requestGPT = new RequestGPT {
model = "gpt-4",
messages = new List<RequestGPTMessage>()
};
```
Neste objeto, adicionaremos 03 mensagens. A primeira mensagem será do tipo `system` e irá indicar o comportamento das respostas a serem geradas.
```csharp
requestGPT.messages.Add(new RequestGPTMessage {
role = "system",
content = "Se comporte como um assistente para sugerir produtos de um e-commerce."
});
```
A segunda mensagem também será do tipo `system` e irá indicar quais são as categorias que o ChatGPT irá considerar ao recomendar um presente.
```csharp
requestGPT.messages.Add(new RequestGPTMessage {
role = "system",
content = "Nesse e-commerce, as categorias de produtos são "+ categoriesNames+"sugira uma dessas categorias baseando-se na solicitação. Não sugira produtos, apenas a categoria com um texto breve de 20 palavras"
});
```
Note que nesta mensagem, estamos concatenando um texto informativo com as categorias existentes no `mongodb`.
Por último, iremos indicar a mensagem que a pessoa usuária irá digitar ao pedir uma recomendação de presente.
```csharp
requestGPT.messages.Add(new RequestGPTMessage {
role = "user",
content = request.message
});
```
Podemos então converter esse objeto para `json` com a biblioteca `Newtonsoft.Json` e fazer uma request com o objeto `HttpClient` passando esse corpo de requisição e o token da API.
```csharp
var requestBody = JsonConvert.SerializeObject(requestGPT);
var httpRequest = new HttpRequestMessage(HttpMethod.Post, $"https://api.openai.com/v1/chat/completions")
{
Content = new StringContent(requestBody, Encoding.UTF8, "application/json")
};
httpRequest.Headers.Add("Accept", "application/json");
httpRequest.Headers.Add("User-Agent", "seu-agent");
_client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", token);
var response = await _client.SendAsync(httpRequest);
if(!response.IsSuccessStatusCode) return default!;
```
Com a response, podemos então converter a resposta da requisição para um DTO que consiga interpretar os dados e obter o texto da primeira resposta do ChatGPT
```csharp
var result = await response.Content.ReadFromJsonAsync<ResponseGPT>();
var resultText = result!.choices!.First().message!.content!.ToString();
```
Neste ponto, teremos na variável `resultText`, a mensagem do GPT4. Como o mesmo indica o texto da categoria escolhida, podemos buscar o objeto do banco de dados referente a essa escolha e montar o objeto de retorno.
```csharp
Category? choiceCategory = null;
foreach(var category in categories)
{
if (resultText.IndexOf(category.Name) > -1)
{
choiceCategory = category;
}
}
AdviceReponse adviceReponse = new AdviceReponse { message = resultText, Category = choiceCategory };
return adviceReponse;
```
Ao final dessa construção, teremos a seguinte camada service
```csharp
public class IAService
{
protected readonly HttpClient _client;
private readonly ICategoryRepository _categoryRepository;
private string token = "sk-proj-6TXNCUChRKjLdPupBYSET3BlbkFJIrrztu24plcHou3YduWv";
public IAService(ICategoryRepository categoryRepository, HttpClient client)
{
_categoryRepository = categoryRepository;
_client = client;
}
public async Task<AdviceReponse> GetAdvice(AdviceRequest request)
{
List<Category> categories = _categoryRepository.GetCategories();
string categoriesNames = "";
foreach(var category in categories)
{
categoriesNames += category.Name + ", ";
}
RequestGPT requestGPT = new RequestGPT {
model = "gpt-4",
messages = new List<RequestGPTMessage>()
};
requestGPT.messages.Add(new RequestGPTMessage {
role = "system",
content = "Se comporte como um assistente para sugerir produtos de um e-commerce."
});
requestGPT.messages.Add(new RequestGPTMessage {
role = "system",
content = "Nesse e-commerce, as categorias de produtos são "+ categoriesNames+"sugira uma dessas categorias baseando-se na solicitação. Não sugira produtos, apenas a categoria com um texto breve de 20 palavras"
});
requestGPT.messages.Add(new RequestGPTMessage {
role = "user",
content = request.message
});
var requestBody = JsonConvert.SerializeObject(requestGPT);
var httpRequest = new HttpRequestMessage(HttpMethod.Post, $"https://api.openai.com/v1/chat/completions")
{
Content = new StringContent(requestBody, Encoding.UTF8, "application/json")
};
httpRequest.Headers.Add("Accept", "application/json");
httpRequest.Headers.Add("User-Agent", "seu-agent");
_client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", token);
var response = await _client.SendAsync(httpRequest);
if(!response.IsSuccessStatusCode) return default!;
var result = await response.Content.ReadFromJsonAsync<ResponseGPT>();
var resultText = result!.choices!.First().message!.content!.ToString();
Category? choiceCategory = null;
foreach(var category in categories)
{
if (resultText.IndexOf(category.Name) > -1)
{
choiceCategory = category;
}
}
AdviceReponse adviceReponse = new AdviceReponse { message = resultText, Category = choiceCategory };
return adviceReponse;
}
}
```
## <a name="controller"></a> Criando a controller
Por fim, para criarmos a controller, precisamos receber em sua injeção de dependências, o `IAService` criado anteriormente, e criar um método que receba do corpo de requisição, o objeto `AdviceRequest` que iremos enviar em nosso serviço.
```csharp
[ApiController]
[Route("[controller]")]
public class AdviceController : ControllerBase
{
private readonly IAService _iaService;
public AdviceController(IAService iaService)
{
_iaService = iaService;
}
[HttpPost]
public async Task<IActionResult> Post([FromBody] AdviceRequest adviceRequest)
{
return Ok(await _iaService.GetAdvice(adviceRequest));
}
}
```
Após essa etapa, devemos garantir as injeções de dependências com:
```csharp
builder.Services.AddScoped<IContextConnection, ContextConnection>();
builder.Services.AddScoped<ICategoryRepository, CategoryRepository>();
builder.Services.AddHttpClient<IAService>();
```
##<a name="testando"></a> Testando a aplicação
Para testar a aplicação, podemos chamar a rota `POST /advice` com um corpo de requisição com uma solicitação.
Podemos ver que, enviamos a solicitação ao ChatGPT e graças à mensagem do tipo `system`, recebemos um texto indicando qual a categoria de produto que o mesmo melhor se enquadra.
Analisando o texto da resposta do ChatGPT, podemos coletar o registro da categoria no banco de dados e retornar para o front-end.
##<a name="conclusao"></a> Conclusão
Você aprendeu como podemos utilizar o `HttpClient` do C# para fazer uma requisição na API do ChatGPT.
Basicamente, se nossa aplicação tivesse nesse momento, uma lista de produtos, poderíamos responder com os produtos mais vendidos nessa categoria. Portanto, criamos uma forma de fazer bom uso da inteligência artificial sem precisar treinar um modelo do zero.
Para facilitar a construção, deixo aqui o [repositório completo](https://github.com/Danilo-Oliveira-Silva/dotnet-gpt).
<h3 style="color:#000066">Danilo Silva</h3>
<img src="https://dev-to-uploads.s3.amazonaws.com/uploads/articles/tj4i67b3yid2wlx90oky.png" />
Desenvolvedor de software experiente em boas práticas, clean code e no desenvolvimento de software embarcado e de integração com hardwares de controle e telecomunicação.
<a href="https://www.linkedin.com/in/danilo-silva-44518956/">Linkedin</a>
<a href="https://github.com/Danilo-Oliveira-Silva">Github</a>
<a href="https://twitter.com/danilosdev">Twitter</a>
<a href="mailto:[email protected]">E-mail</a> | danilosilva |
1,910,488 | hi | thử | 0 | 2024-07-03T17:50:10 | https://dev.to/johnny_young_1ae56d828036/hi-3474 | thử | johnny_young_1ae56d828036 |
|
1,910,485 | 𝐂𝐫𝐞𝐚𝐭𝐢𝐧𝐠 𝐚 𝐜𝐲𝐛𝐞𝐫𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐬𝐭𝐫𝐚𝐭𝐞𝐠𝐲 𝐟𝐨𝐫 𝐲𝐨𝐮𝐫 𝐛𝐮𝐬𝐢𝐧𝐞𝐬𝐬: 𝐤𝐞𝐲 𝐬𝐭𝐚𝐠𝐞𝐬 𝐚𝐧𝐝 𝐫𝐞𝐜𝐨𝐦𝐦𝐞𝐧𝐝𝐚𝐭𝐢𝐨𝐧𝐬 🔒 | In today's digital world, data protection is becoming a necessity for any business, including small... | 0 | 2024-07-03T17:46:47 | https://dev.to/namik_ahmedov/-42pl | cybersecurity, security | In today's digital world, data protection is becoming a necessity for any business, including small and medium enterprises. Regular incidents of security breaches and data leaks underscore the importance of a thoughtful approach to cybersecurity. Here are several key steps that will help you develop an effective cybersecurity strategy:
1. 𝐓𝐡𝐫𝐞𝐚𝐭 𝐚𝐧𝐝 𝐕𝐮𝐥𝐧𝐞𝐫𝐚𝐛𝐢𝐥𝐢𝐭𝐲 𝐀𝐬𝐬𝐞𝐬𝐬𝐦𝐞𝐧𝐭: Start with a comprehensive analysis of your business's current cybersecurity. Identify the main threats and vulnerabilities you face, along with their potential implications for your operations.
2. 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐏𝐨𝐥𝐢𝐜𝐲 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Establish clear and understandable rules and procedures regarding data protection and information security. Include policies for using complex passwords, regularly updating software, implementing multi-factor authentication, and other basic measures.
3. 𝐄𝐦𝐩𝐥𝐨𝐲𝐞𝐞 𝐓𝐫𝐚𝐢𝐧𝐢𝐧𝐠: Organize training sessions for your staff on the fundamentals of cybersecurity. Training should cover social engineering threats, email security practices, basics of safe internet browsing, and more.
4. 𝐑𝐞𝐠𝐮𝐥𝐚𝐫 𝐀𝐮𝐝𝐢𝐭𝐢𝐧𝐠 𝐚𝐧𝐝 𝐌𝐨𝐧𝐢𝐭𝐨𝐫𝐢𝐧𝐠: Set up processes for regular cybersecurity audits and system monitoring. This will help identify potential issues early on and prevent security incidents.
5. 𝐂𝐮𝐬𝐭𝐨𝐦𝐞𝐫 𝐃𝐚𝐭𝐚 𝐏𝐫𝐨𝐭𝐞𝐜𝐭𝐢𝐨𝐧: Ensure the protection of customer data in accordance with applicable legislative requirements (e.g., GDPR) to avoid breaches and maintain trust.
6. 𝐈𝐧𝐜𝐢𝐝𝐞𝐧𝐭 𝐑𝐞𝐬𝐩𝐨𝐧𝐬𝐞: Develop an incident response plan that includes steps for quick detection, analysis, and resolution of security incidents.
These steps will help strengthen your business's cybersecurity and protect it from potential threats. Investing in data protection is not only a commitment to your customers but also a strategic decision that contributes to the long-term sustainability and success of your business.
Share your thoughts and experiences in the comments! What data protection measures have you already implemented in your business? 💬 | namik_ahmedov |
1,910,484 | Manual DOM Rendering with JavaScript vs. React's Virtual DOM | Introduction This documentation explains how to manually create and render DOM elements... | 0 | 2024-07-03T17:43:12 | https://dev.to/anurag_singh_2jz/manual-dom-rendering-with-javascript-vs-reacts-virtual-dom-2d5 | webdev, javascript, react, programming | ## Introduction
This documentation explains how to manually create and render DOM elements using plain JavaScript. We will cover the implementation of a custom rendering function and its comparison to how JSX is processed in React.
**creating a custom render function**
we created a customRender function which takes two parameters
1. `imgTag` : object which specifies the property
2. `root` : parent element where the element is to be appended
Inside function definition we created img tag and added attributes to it
and in the end we appended it in the root div
- overall we made the manually created the DOM and rendered it on the web page
## manual insertion
```
let imgtag = {
type:'img',
props:{
src:'https://www.google.com/images/branding/googlelogo/1x/googlelogo_light_color_272x92dp.png',
alt:'image of google'
}
}
function IMGrender(imgtag,root){
let div = document.createElement(imgtag.type)
for (const key in imgtag.props) {
if(key === "children") continue;
div.setAttribute(key,imgtag.props[key])
}
root.appendChild(div)
}
IMGrender(imgtag,root)
```
## Comparison to React
The customRender function manually performs tasks that React handles automatically when processing JSX. React uses a virtual DOM to efficiently manage and update the actual DOM.
- here in react we can use JSX to make a component (html tags) which
later get converted into the object like a object in a customRender
function
**Vite uses esbuild as its bundler to parse JSX code into JavaScript objects (AST - Abstract Syntax Tree).**
## using react
```
import React from 'react'
import ReactDOM from 'react-dom/client'
function Img(){
return(
<img src='https://www.google.com/images/branding/googlelogo/1x/googlelogo_light_color_272x92dp.png' alt='img'></img>
)
}
```
## Summary
The custom render function demonstrates manual DOM manipulation, where you directly create and update elements. In contrast, React abstracts these details away using JSX and the virtual DOM, which allows for more efficient updates and simpler, more declarative UI code.
| anurag_singh_2jz |
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https://g.co/kgs/RixKGhF
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https://tshirtfactorie.com | tshirt_manufacturer_7d51b |
1,910,479 | Applications and Basic Principles of Machine Learning in Everyday Life | Machine learning, as a cornerstone of modern technology, appears in many aspects of our daily lives.... | 0 | 2024-07-03T17:27:35 | https://dev.to/bilge_koc/applications-and-basic-principles-of-machine-learning-in-everyday-life-2a5 | Machine learning, as a cornerstone of modern technology, appears in many aspects of our daily lives. For example, a shopping platform analyzes your past purchases to determine your personal preferences and make personalized product recommendations. Tesla's autonomous driving capabilities allow its vehicles to recognize traffic rules, other vehicles, pedestrians, and obstacles. Gmail organizes your inbox by classifying emails as spam, irrelevant, or important. Netflix uses data from the shows and movies you've watched to recommend new content tailored specifically to you.
Without these recommendation algorithms, finding what you're looking for among hundreds or thousands of movies would be difficult, and the platform's efficiency would be significantly reduced. Machine learning automates discovery and greatly enhances user experience. But how do these processes occur? Do engineers code every detail manually? Of course not. These platforms and devices are equipped with learning algorithms that observe user data and learn on their own.
Examining machine learning in this context reveals a direct correlation between the abundance of data and the things that can be learned. Imagine we have a data pool; as our data increases and this pool fills up, the number of things that can be learned also increases. If we have no data, meaning our pool is empty, there is nothing to learn. The more data we have, the higher the learning capacity and accuracy of the algorithms. Therefore, the amount and quality of data are critical to the success of machine learning processes.
### Types of Machine Learning: Supervised, Unsupervised, Reinforcement, and Semi-Supervised Learning
Artificial intelligence (AI) and machine learning (ML) solve complex problems using various learning methods. These methods define how algorithms interact with different types of data and learn. This article discusses supervised learning, unsupervised learning, reinforcement learning, and semi-supervised learning.
#### Supervised Learning
Supervised learning is a type of learning that uses labeled datasets for a specific task. In this method, the algorithm is trained with an input-output pair. The goal is to learn the relationship between input data and correct outputs.
**Example:**
Consider a fruit classification system. Input data includes the characteristics of the fruit (color, size, weight), and output data includes the type of fruit (apple, banana, orange). The algorithm learns to classify different fruits correctly using this data.
**Advantages:**
- High accuracy: The algorithm provides correct results due to the labeled dataset.
- Broad application: Suitable for various tasks such as prediction, classification, and regression.
**Disadvantages:**
- Data requirements: Needs large labeled datasets.
- Labeling cost: Manually labeling data can be time-consuming and costly.
#### Unsupervised Learning
Unsupervised learning is a type of learning that works with unlabeled data. The algorithm aims to discover hidden patterns and structures in the data. This method is used to gain new insights into datasets.
**Example:**
Consider a system used for customer segmentation. By analyzing customers' shopping habits (purchased products, amount spent, visit frequency), customer groups (segments) with similar characteristics are formed.
**Advantages:**
- No label requirement: Can work with unlabeled data.
- Discovery: Discovers hidden patterns and structures in the data.
**Disadvantages:**
- Uncertainty: Outputs may not always be meaningful or useful.
- Evaluation difficulty: It's hard to evaluate the model's performance since there are no labels to determine correct results.
#### Semi-Supervised Learning
Semi-supervised learning is a type of learning that uses both labeled and unlabeled data. This method is ideal for situations where labeled data is scarce, but there is a large amount of unlabeled data.
**Example:**
Consider a language translation system. The system is trained with a small number of labeled translation examples and a large amount of unlabeled text data. Unlabeled data helps the system learn the structure and rules of the language.
**Advantages:**
- Data efficiency: High accuracy can be achieved with a small amount of labeled data.
- Lower labeling cost: Learning is achieved from unlabeled data as well.
**Disadvantages:**
- Model complexity: Working with both labeled and unlabeled data requires more complex models.
- Performance uncertainty: The quality of unlabeled data can affect the model's performance.
#### Reinforcement Learning
Reinforcement learning is a trial-and-error process in which an agent tries to maximize its reward in a given environment. The agent takes a series of actions and receives rewards or penalties as a result. The goal is to learn the best strategy to achieve the highest long-term reward.
**Example:**
Consider a robot trying to find its way out of a maze. The robot receives a reward (moving in the correct direction) or a penalty (moving in the wrong direction) for each action. Over time, it learns the path that results in the least penalties and the highest rewards to exit the maze.
**Advantages:**
- Adaptability: The agent can adapt to dynamic and changing environments.
- Self-learning: It has the capacity to learn without human intervention.
**Disadvantages:**
- Time and resource requirements: Learning the optimal strategy can take a long time and require high processing power.
- Complexity: The learning process can be very complex for some problems.
### Conclusion
Supervised, unsupervised, reinforcement, and semi-supervised learning are fundamental methods of artificial intelligence and machine learning. Each method is suitable for different types of data and problems, playing important roles in data analysis and decision-making processes. These learning types enable the development of modern AI applications and the solution of various problems in everyday life. | bilge_koc |
|
1,910,436 | Linux User Creation Bash Script | This Bash script automates the creation of user accounts and group memberships in Ubuntu. It takes a... | 0 | 2024-07-03T17:26:19 | https://dev.to/toluwanee/linux-user-creation-bash-script-5d3b | This Bash script automates the creation of user accounts and group memberships in Ubuntu. It takes a text file as input, where each line specifies a username and the groups they should belong to (comma-separated). The script performs the following actions:
- Reads the user and group information from the text file.
- Creates user accounts if they don't already exist.
- Creates groups if they don't already exist.
- Adds users to the specified groups.
- Generates random passwords for each user.
- Sets permissions and ownership for user home directories.
- Logs its actions in a file for reference.
- This script simplifies user and group management, saving time and reducing the risk of errors compared to manual configuration.
Each User must have a personal group with the same group name as the username, this group name will not be written in the text file.
A user can have multiple groups, each group delimited by comma ","
Usernames and user groups are separated by semicolon ";"- Ignore whitespace
e.g.
Tolu;developer,tester,security
Code Breakdown.
`#!/bin/bash`
Helps the script to run in a bash shell once called.
This shebang! establishes a well-defined environment for the script
**Defining Variables:**
```bash
logfile="/var/log/user_management.log"
password_file="/var/secure/user_passwords.csv"
text_file=$1
```
The script utilizes variables to store crucial paths and user input. This enhances readability and maintainability. Here's a breakdown of the defined variables:
1. `logfile`: This variable holds the path for the log file where the script's actions are recorded. By default, it points to `/var/log/user_management.log`.
2. `password_file`: This variable stores the path to the password file. This file securely stores usernames and their corresponding randomly generated passwords. The default location is `/var/secure/user_passwords.csv`.
3. `text_file`: This variable captures the filename provided by the user as the first argument (`$1`). This file is expected to contain a list of usernames and their associated groups, separated by semicolons.
**Input Validation:**
The script ensures proper user input by performing validation. It checks if the user has provided the essential text file containing user and group information. Here's the code snippet for this validation:
```bash
if [ -z "$text_file" ]; then
echo "Error: Usage: $0 <name of text file>"
exit 1
fi
```
This block of code checks if the `text_file` variable is empty.
- If the file is missing, an error message is displayed, informing the user of the correct usage (`echo`).
- The script exits with an error code (`exit 1`) to indicate an issue with the input.
## File Management: Creating Essential Files
**Creating Directories:**
- The script employs the `mkdir -p` command to create the directory structure for the password file if it doesn't already exist. This ensures the script doesn't encounter errors due to missing directories. The `-p` flag in `mkdir` instructs it to create parent directories if necessary.
**Creating Log and Password Files:**
- The `touch` command is used to create the log file (`$logfile`) and password file (`$password_file`). This establishes empty files for the script to record its actions and store passwords.
**Setting Permissions:**
- The script prioritizes security by setting strict permissions (600) for the password file using `chmod 600 "$password_file"`. This restricts access to the file, allowing only the owner to read and write to it. This prevents unauthorized access to sensitive password information.
## Building Users and Groups: The actual automation section
**`generate_random_password`**
- This function generates a secure and random password for each user.
```bash
function generate_random_password() {
local length=${1:-10} # Default length of 10 characters
tr -dc 'A-Za-z0-9!?%+=' < /dev/urandom | head -c "$length"
}
```
- The function leverages `/dev/urandom` to access a cryptographically secure random number generator.
- It utilizes the `tr` command for character filtering. This ensures the password includes alphanumeric characters, special symbols (`!?%+=`), and avoids potential issues with spaces in passwords.
- Finally, `head -c "$length"` extracts the desired number of characters to form the random password.
**`log_message` Function**
- This function simplifies logging by appending a timestamp and the script filename (`$text_file`) to the log file (`$logfile`). Here's the code:
```bash
function log_message() {
echo "$(date '+%Y-%m-%d %H:%M:%S') - $text_file" >> "$logfile"
}
```
- The `date` command with the `'+%Y-%m-%d %H:%M:%S'` format generates a timestamp for each log message.
- The entire message is then appended to the log file using `echo >>`.
**`create_user` Function and User Creation **
- This function handles user creation based on the user information in the text file. Here's a breakdown:
```bash
function create_user() {
local username="$1"
local groups="$2"
if getent passwd "$username" > /dev/null;
then
log_message "User $username already exists"
else
useradd -m "$username"
log_message "Created user $username"
fi
}
```
- It takes two arguments: `username` and `groups` (comma-separated list).
- The function first checks if the user already exists using `getent passwd "$username" > /dev/null`. If the command exits successfully, it means the user exists.
- If the user doesn't exist:
- The script creates the user's home directory with `useradd -m "$username"`. The `-m` flag instructs `useradd` to create a home directory for the user.
- A success message regarding user creation is logged using `log_message`.
- Otherwise, a message indicating the user already exists is logged.
**Group Management and User-Group Associations**
- The script iterates through each line in the text file, processing users and their assigned groups. Here's the process:
```
while IFS=';' read -r username groups; do
create_user "$username" "$groups"
groups_array=($(echo $groups | tr "," "\n"))
for group in "${groups_array[@]}";
do
if ! getent group "$group" > /dev/null;
then
groupadd "$group"
log_message "Group created $group"
else
log_message "Group $group already exists"
fi
usermod -aG "$group" "$username"
log_message "Added user $username to group $group"
done
```
- A `while` loop iterates through each line in the `text_file`
- Inside the loop:
- The `create_user` function is called to create the user (already described earlier).
- The comma-separated groups are split into an array (`groups_array`) using `tr` for easier processing.
- Another loop iterates through each group in the `groups_array`.
- It checks if the group exists using `getent group "$group" > /dev/null`.
`getend` is a command used to request file from database in the CLI
## Security Home and Password Assignment:
security and finalizing the user setup:
**Home Directory Permissions**
- The script prioritizes security by setting appropriate permissions for each user's home directory. Here's the code:
```bash
chmod 700 "/home/$username"
chown "$username:$username" "/home/$username"
log_message "Set up home directory for user $username"
```
- The script restricts access to the user's home directory by setting permissions to 700 with `chmod 700 "/home/$username"`. This grants read, write, and execute permissions only to the owner (the user).
- Ownership of the home directory is then transferred to the user with `chown "$username:$username" "/home/$username"`. This ensures the user has full control over their home directory and its contents.
- A success message regarding home directory setup is logged.
**Password Assignment**
- The script assigns a unique and secure password to each user. Here's the process:
```bash
password=$(generate_random_password # Generate 10-character password
echo "$username:$password" | chpasswd
echo "$username,$password" >> "$password_file"
log_message "Set password for $username"
```
- It utilizes the `generate_random_password` function (described earlier) to create a 10-character random password for each user.
- The username and password are combined (`"$username:$password"`) and used with `chpasswd` to set the password for the user.
- The script then stores both the username and the randomly generated password in the secure password file (`"$password_file"`) for reference.
- Finally, a success message regarding password assignment is logged.
**Bringing it All Together:**
```
#!/bin/bash
#Log file and password location
logfile="/var/log/user_management.log"
password_file="/var/secure/user_passwords.csv"
text_file=$1
#check for file input
if [ -z "$text_file" ]
then
echo "Usage is: $0 <name of text file>"
exit 1
fi
#Create Log file and password files
mkdir -p /var/secure
touch $logfile $password_file
chmod 600 $password_file
#function to generate randompasswords
generate_random_password() {
local length=${1:-10}
tr -dc 'A-Za-z0-9!?%+=' < /dev/urandom | head -c $length
}
log_message() {
echo "$(date '+%Y-%m-%d %H:%M:%S') - $text_file" >> $logfile
}
#FUNCTION TO CREATE USER
create_user() {
local username=$1
local groups=$2
if getent passwd "$username" > /dev/null;
then
log_message "User $username already exists"
else
useradd -m $username
log_message "Created user $username"
fi
#Adding user to groups
groups_array=($(echo $groups | tr "," "\n"))
for group in "${groups_array[@]}";
do
if ! getent group "$group" > /dev/null;
then
groupadd "$group"
log_message "Group created $group"
else
log_message "Group $group already exists"
fi
usermod -aG "$group" "$username"
log_message "Added user $username to group $group"
done
chmod 700 /home/$username
chown $username:$username /home/$username
log_message "Set up home directory for user $username"
#Assigning Random password to users
password=$(generate_random_password 12)
echo "$username:$password" | chpasswd
echo "$username,$password" >> $password_file
log_message "Set password for $username"
}
while IFS=';' read -r username groups;
do
create_user "$username" "$groups"
done < "$text_file"
echo "User creation done." | tee -a $logfile
```
By combining these steps, the script automates the creation of user accounts, assigns them to designated groups, ensures secure home directory permissions, and provides a record of usernames and randomly generated passwords. This script streamlines user and group management, saving time and effort while promoting security best practices.
To learn more and push your programming journey forward you can visit:
https://hng.tech/internship or https://hng.tech/hire
I am open to receiving comments with questions or suggestions that improves the script. Cheers!
[Link to github repo](https://github.com/Toluwanee/linux-user-creation-bash-script.git)
| toluwanee |
|
1,910,477 | Handling Categorical Values|| Machine Learning | Hey reader👋 Hope you are doing well😊 We know that machine learning is all about training our models... | 0 | 2024-07-03T17:25:37 | https://dev.to/ngneha09/handling-categorical-values-machine-learning-a2 | datascience, machinelearning, beginners, tutorial | Hey reader👋 Hope you are doing well😊
We know that machine learning is all about training our models on the given dataset and generating accurate output for any unseen similar data. There are algorithms (Regression algorithms) that works on numerical data only. And we know that dataset may contain numerical as well as categorical data. Then how can we use some algorithms that only work on numerical data on such dataset. To use Regression algorithms on categorical data we need to transform categorical data into numerical. But how can we do that?🤔
Don't worry in this blog I am going to tell you that how we can handle Categorical data.
So let's get started🔥
## Handling Categorical Data
Categorical data refers to the categories in the data. Example -> male, female, red, green, yes or no.
(To understand the types of data that we can encounter please read this artice[https://dev.to/ngneha09/day-2-of-machine-learning-582g])
There are different techniques in Python's sklearn library to handle categorical data. Let's read about them-:
**1. Label Encoder **
The Label Encoder identifies unique categories within a categorical variable and then it assigns unique value to each category. There is no strict rule on how these numerical labels are assigned. One common method is to assign labels based on alphabetical order of categories. It is best suited to ordinal categorical variables.
Implementation-:
So here you can see that we have imported the LabelEncoder from sklearn's `preprocessing` module then we have created it's instance and then transformed categories into numerical labels using `fit_transform`.
Disadvantage-:
Due to arbitrary assignment this technique may not reflect meaningful relationships in the data.
**2. One Hot Encoding**
This technique creates binary features for each category in original variable.
So here you can see that in the first row we have red color so we have 1 assigned color_red and others are given 0.
Implementation-:
Here we have imported OneHotEncoder and then fit the data and transformed categories.
Disadvantages-:
With high cardinality categorical variables this can create sparse matrix, a matrix where most of the elements are 0. It can also result in increased dimensionality of data. Also it is not good for ordinal data as it doesn't preserve order.
**3. Binary Encoding**
This technique is combination of Hashing and Binary. In this technique the unique categories are assigned unique integers which are then converted into binary code (bit representation).
Implementation-:
Now you can see that extra columns are only the number of bits used in maximum integer assigned to categories.
This technique is best for nominal data where we have large number of categories.
Disadvantage-:
This technique is not good for ordinal data as it does not follow any order.
**4. Ordinal Encoding**
The critical aspect of Ordinal Encoding is to respect the inherent ordering of the categories. The integers should be assigned in such a way that the order of categories is preserved.
So here you can see that Poor is assigned 1 then Good is assigned 2 and so on. So here the ordering of the categories is preserved.
Implementation-:
Here the encoder takes a 2D array ,we can see that the encoded data is in alphabetical order. This is because we have not given any particular order to encoder so it encodes data on the basis of alphabetical order.
Here we have created an OrdinalEncoder instance with the specified order of categories.
Disadvantages-:
This encoding doesn't suit for nominal variables.
**5. Frequency Encoding**
This is used for nominal categorical variables with high cardinality. In this technique we calculate the frequency of each category and the encoded value is given by frequency of that category divided by total categories.
Implementation-:
Disadvantage-:
The major disadvantage of this technique is that multiple categories can have same frequency and as a result they will have same encoding.
**6. Mean Encoding**
In this technique each category in the feature variable is replaced with the mean value of the target variable for that category.
Example-: Suppose we are predicting price of car (target variable) and we have a categorical variable 'Color'. If the average price of car is $20,000 then 'Red' would be replace by 20,000 in encoded feature.
It is useful when dealing with high cardinality Categorical features.
Implementation-:
Here we have calculated mean of the target variable for each category. Map the original categories to their corresponding means. Replace each category with the computed mean.
It has high chances of capturing any existing relationship between category and target variable.
Disadvantages-:
Mean encoding can lead to overfitting, especially when categories have few observations. Regularization techniques, such as smoothing, can help mitigate this risk.
So this is how we handle categorical values. I hope you have understood it well. For more don't forget to follow me.
Thankyou❤ | ngneha09 |
1,910,475 | Linux User Creation Bash Script | Introduction We can use a Bash script to automate the creation of users and groups, set up... | 0 | 2024-07-03T17:21:01 | https://dev.to/wolecharles/linux-user-creation-bash-script-25n9 | ## Introduction
We can use a Bash script to automate the creation of users and groups, set up home directories, generate random passwords, and log all actions.
## Script Overview
The script we're going to discuss performs the following functions:
Create Users and Groups: Reads a file containing usernames and group names, creates the users and groups if they do not exist, and assigns users to the specified groups.
Setup Home Directories: Sets up home directories with appropriate permissions and ownership for each user.
Generate Random Passwords: Generates random passwords for the users and stores them securely.
Log Actions: Logs all actions to /var/log/user_management.log for auditing and troubleshooting.
Store Passwords Securely: Stores the generated passwords in /var/secure/user_passwords.csv with restricted access.
## The Script
Here is the complete Bash script:
```
#!/bin/bash
LOG_FILE="/var/log/user_management.log"
PASSWORD_FILE="/var/secure/user_passwords.csv"
# Ensure /var/secure exists and has the correct permissions
mkdir -p /var/secure
chmod 700 /var/secure
touch "$PASSWORD_FILE"
chmod 600 "$PASSWORD_FILE"
# Function to log messages
log_message() {
echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" | tee -a "$LOG_FILE"
}
# Function to generate random passwords
generate_password() {
local password_length=12
tr -dc A-Za-z0-9 </dev/urandom | head -c $password_length
}
# Function to add users, groups and set up home directories
setup_user() {
local username=$1
local groups=$2
# Create the user
# &>/dev/null
if ! id -u "$username" &>/dev/null; then
password=$(generate_password)
useradd -m -s /bin/bash "$username"
echo "$username:$password" | chpasswd
log_message "User $username created."
# Store the username and password
echo "$username,$password" >> "$PASSWORD_FILE"
log_message "Password for $username stored."
else
log_message "User $username already exists."
fi
# Create groups and add user to groups
IFS=',' read -ra group_array <<< "$groups"
for group in "${group_array[@]}"; do
if ! getent group "$group" &>/dev/null; then
groupadd "$group"
log_message "Group $group created."
fi
usermod -aG "$group" "$username"
log_message "Added $username to $group."
done
# Set up the home directory
local home_dir="/home/$username"
chown "$username":"$username" "$home_dir"
chmod 700 "$home_dir"
log_message "Home directory for $username set up with appropriate permissions."
}
# Main script
if [ $# -eq 0 ]; then
log_message "Usage: $0 <input_file>"
exit 1
fi
input_file=$1
log_message "Starting user management script."
# Read the input file and process each line
while IFS=';' read -r username groups; do
setup_user "$username" "$groups"
done < "$input_file"
log_message "User management script completed."
```
### Logging and Password File Setup
* The script ensures that the /var/secure directory exists and has the appropriate permissions.
* It creates the password file /var/secure/user_passwords.csv and ensures only the owner can read it.
```bash
mkdir -p /var/secure
chmod 700 /var/secure
touch "$PASSWORD_FILE"
chmod 600 "$PASSWORD_FILE"
```
### Message_Log
The log_message function logs messages to /var/log/user_management.log with a timestamp.
```bash
log_message() {
echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" | tee -a "$LOG_FILE"
}
```
### password function
The generate_password function generates a random password of a specified length (12 characters in this case).
```bash
generate_password() {
local password_length=12
tr -dc A-Za-z0-9 </dev/urandom | head -c $password_length
}
```
### User Setup Function
The setup_user function creates users, adds them to groups, sets up home directories with appropriate permissions, and logs each action. It also generates and stores passwords securely.
```bash
setup_user() {
local username=$1
local groups=$2
# Create the user
if ! id -u "$username" &>/dev/null; then
password=$(generate_password)
useradd -m -s /bin/bash "$username"
echo "$username:$password" | chpasswd
log_message "User $username created."
# Store the username and password
echo "$username,$password" >> "$PASSWORD_FILE"
log_message "Password for $username stored."
else
log_message "User $username already exists."
fi
```
### Main Script
The main part of the script takes an input file as an argument, reads it line by line, and processes each line to create users and groups, set up home directories, and log actions.
```bash
if [ $# -eq 0 ]; then
log_message "Usage: $0 <input_file>"
exit 1
fi
```
### This makes sure you run the script with an input_file, i.e input.txt
```bash
input_file=$1
log_message "Starting user management script."
```
### Usage
To use this script, save it to a file (e.g., user_management.sh), make it executable, and run it as a root user with the path to your input file as an argument:
input.txt
```bash
user1;group1,group2
user2;group3,group4
```
on the Command Line(CMD) | Terminal
```bash
chmod +x user_management.sh
./create_users.sh input.txt
```
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| wolecharles |
|
1,910,461 | Buy GitHub Accounts | https://dmhelpshop.com/product/buy-github-accounts/ Buy GitHub Accounts GitHub holds a crucial... | 0 | 2024-07-03T17:15:07 | https://dev.to/piyenag121/buy-github-accounts-4hgc | node, learning, typescript, css | https://dmhelpshop.com/product/buy-github-accounts/
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| piyenag121 |
1,910,460 | 20 examples of LLM-powered applications in the real world | The recent advancements in LLMs improved their performance and made them more affordable – this... | 0 | 2024-07-03T17:13:55 | https://dev.to/dasha_maliugina/20-examples-of-llm-powered-applications-in-the-real-world-p8c | llm, machinelearning, ai, genai | The recent advancements in LLMs improved their performance and made them more affordable – this unlocked multiple possibilities for companies to integrate LLMs into their products. Indeed, there have been a lot of impressive demos. But how do companies actually use LLMs in production?
We put together and regularly update a [database](https://www.evidentlyai.com/ml-system-design) of 450 use cases from 100+ companies that detail real-world applications and insights from ML and LLM system design. In this blog, we share 20 selected examples of LLM-powered products from various industries.
The database is maintained by the team behind Evidently, an open-source tool for LLM and ML evaluation and observability. [Give us a star on GitHub](https://github.com/evidentlyai/evidently) to support the project!
## 👷 [LinkedIn extracts skill information from texts](https://www.linkedin.com/blog/engineering/skills-graph/extracting-skills-from-content)
They extract skills from various content across the platform and map these skills to their Skills Graph to ensure accurate job and learning matches.
## 🗝 [Google speeds up security and privacy incidents workflows](https://security.googleblog.com/2024/04/accelerating-incident-response-using.html)
They use LLMs to summarize incidents for different audiences, including executives, leads, and partner teams. It saves responders’ time and improves the quality of incident summaries.
## 🏪 [Picnic improves search relevance for product listings](https://blog.picnic.nl/enhancing-search-retrieval-with-large-language-models-llms-7c3748b26d72)
They leverage LLMs to enhance product and recipe search retrieval for users from three countries with their own unique language and culinary preferences.
## 🙅 [Yelp detects inappropriate language in reviews](https://engineeringblog.yelp.com/2024/03/ai-pipeline-inappropriate-language-detection.html)
The company enhanced its content moderation system with LLMs to help identify egregious instances of threats, harassment, lewdness, personal attacks, or hate speech.
## 🚗 [Uber tests mobile applications](https://www.uber.com/en-GB/blog/generative-ai-for-high-quality-mobile-testing/?uclick_id=13598f30-43e0-466c-a42c-347f4bab3bbf)
They created DragonCrawl, a system that uses LLMs to execute mobile tests with the intuition of a human. It saves thousands of developer hours and reduces test maintenance costs.
## #️⃣ [Grab automatically tags sensitive data](https://engineering.grab.com/llm-powered-data-classification)
They use LLM to classify data entities, identify sensitive data, and assign the most appropriate tag to each entity.
## 🛒 [Instacart builds an internal AI assistant](https://tech.instacart.com/scaling-productivity-with-ava-instacarts-internal-ai-assistant-ed7f02558d84)
Teams use an internal AI assistant called Ava to write, review and debug code, improve communications, and build AI-enabled internal tools on top of the company’s APIs.
## 🛍 [Whatnot detects marketplace spam](https://medium.com/whatnot-engineering/how-whatnot-utilizes-generative-ai-to-enhance-trust-and-safety-c7968eb6315e)
They use LLMs to enhance trust and safety areas like multimodal content moderation, fulfillment, bidding irregularities, and general fraud protection.
## 💌 [Nextdoor generates engaging email subject lines](https://engblog.nextdoor.com/let-ai-entertain-you-increasing-user-engagement-with-generative-ai-and-rejection-sampling-50a402264f56)
The company aims to generate informative and engaging subject lines that will lead to more email opens, clicks, and eventually more sessions on the platform.
## 🍿 [Vimeo builds customer support AI assistant](https://medium.com/vimeo-engineering-blog/from-idea-to-reality-elevating-our-customer-support-through-generative-ai-101a2c5ea680)
They prototyped a help desk chatbot where customers input their questions and receive immediate, accurate, and personalized responses.
## 🤖 [GoDaddy classifies support inquiries](https://www.godaddy.com/resources/news/llm-from-the-trenches-10-lessons-learned-operationalizing-models-at-godaddy)
GoDaddy leverages LLMs to enhance customer experience in their messaging channels by classifying support inquiries. They share lessons learned operationalizing these models.
## 🗞 [OLX extracts information from job listings](https://tech.olx.com/extracting-job-roles-in-job-ads-a-journey-with-generative-ai-e8b8cf399659)
They use Prosus AI Assistant, their generative AI (GenAI) model, to extract job roles in job ads and ensure a closer alignment between job seekers’ desired jobs and the relevant listings.
## 🔢 [Honeycomb helps users write data queries](https://www.honeycomb.io/blog/we-shipped-ai-product)
The company built Query Assistant to accelerate users’ learning curve associated with queries. Users can describe or ask things in plain English like “slow endpoints by status code” and Query Assistant will generate a relevant Honeycomb query to iterate on.
## 📦 [DoorDash extracts product attributes from unstructured SKU data](https://doordash.engineering/2024/04/23/building-doordashs-product-knowledge-graph-with-large-language-models/)
They use LLMs to extract and tag product attributes from raw merchant data. It allows to easily match customer queries with relevant items on DoorDash and helps delivery drivers to find the correct product in the store.
## ⚠️ [Incident.io generates summaries of software incidents](https://incident.io/blog/lessons-learned-from-building-our-first-ai-product)
Incident.io helps to collaborate on software incidents by suggesting and updating the incident summary. This suggestion considers the latest update, the conversation in the Slack channel, and the previous summary. Half of all summary updates in Incident.io are now written by AI.
## 🪡 [StitchFix generates ad headlines and product descriptions](https://multithreaded.stitchfix.com/blog/2023/03/06/expert-in-the-loop-generative-ai-at-stitch-fix/)
The company combines algo-generated text with a human expert-in-the-loop approach to streamline crafting engaging advertisement headlines and producing high-fidelity product descriptions.
## 💳 [Digits suggests questions about banking transactions](https://digits.com/developer/posts/assisting-accountants-with-generative-machine-learning/)
They use generative models to assist their customers – accountants – by suggesting questions about a transaction to a client. The accountants can then send the question to their client as is, or edit it without typing everything from scratch.
## 🧑🏫 [Duolingo generates content for lessons](https://blog.duolingo.com/large-language-model-duolingo-lessons/)
The company leverages LLMs to help their learning designers come up with relevant exercises for lessons. Human experts plan out the theme, grammar, vocabulary, and exercise types for a given lesson and the model outputs relevant exercises.
## 🏠 [Zillow detects discriminatory content in real-estate listings](https://www.zillow.com/tech/using-ai-to-understand-the-complexities-and-pitfalls-of-real-estate-data/)
The company uses LLMs to understand whether real-estate listings contain proxy for race and other remnants of historical inequalities in the real estate domain.
## 🍲 [Swiggy improves search relevance in hyperlocal food delivery](https://bytes.swiggy.com/improving-search-relevance-in-hyperlocal-food-delivery-using-small-language-models-ecda2acc24e6)
They use LLMs to match search queries in a variety of languages with millions of dish names with regional variety.
## Want more examples of LLM systems in production?
Check out our [database](https://www.evidentlyai.com/ml-system-design) of 450 use cases from 100+ companies that share their learnings from implementing ML and LLM systems. Bookmark the list and enjoy the reading! | dasha_maliugina |
1,910,458 | Part 1. Routing in React JS Step-by-Step Examples | React Routing is crucial for single-page applications (SPA) as it controls navigation and displays... | 0 | 2024-07-03T17:13:37 | https://dev.to/sudhanshu_developer/part-1-routing-in-react-js-step-by-step-examples-do0 | webdev, javascript, programming, beginners | **React Routing** is crucial for single-page applications (SPA) as it controls navigation and displays different content based on the URL. React Router is a popular library that makes this process simple and efficient in this guide.
First, you need to install the `react-router-dom` package in your React project.
```
npm install react-router-dom
```
**Project Structure**
Here’s a basic project structure for setting up React Router:
```
my-app/
├── public/
├── src/
│ ├── components/
│ │ ├── Home.js
│ │ ├── About.js
│ │ ├── Contact.js
│ ├── App.js
│ ├── index.js
├── package.json
```
**Creating Components**
Create the components for different routes.
`Home.js`
```
import React from 'react';
const Home = () => {
return (
<div>
<h1>Home Page</h1>
<p>Welcome to the home page!</p>
</div>
);
};
export default Home;
```
`About.js`
```
import React from 'react';
const About = () => {
return (
<div>
<h1>About Page</h1>
<p>This is the about page.</p>
</div>
);
};
export default About;
```
`Contact.js`
```
import React from 'react';
const Contact = () => {
return (
<div>
<h1>Contact Page</h1>
<p>Get in touch with us.</p>
</div>
);
};
export default Contact;
```
****Setting Up Routes in **`App.js`**
Now, set up the routes in your App.js file using React Router.
`App.js`
```
import React from 'react';
import { BrowserRouter as Router, Route, Switch, Link } from 'react-router-dom';
import Home from './components/Home';
import About from './components/About';
import Contact from './components/Contact';
const App = () => {
return (
<Router>
<div>
<nav>
<ul>
<li>
<Link to="/">Home</Link>
</li>
<li>
<Link to="/about">About</Link>
</li>
<li>
<Link to="/contact">Contact</Link>
</li>
</ul>
</nav>
<Switch>
<Route path="/" exact component={Home} />
<Route path="/about" component={About} />
<Route path="/contact" component={Contact} />
</Switch>
</div>
</Router>
);
};
export default App;
```
**Index.js**
Ensure your` index.js` renders the App component.
```
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';
ReactDOM.render(
<React.StrictMode>
<App />
</React.StrictMode>,
document.getElementById('root')
);
```
**Running Your Application**
Start your React application to see the routing in action.
```
npm start
```
**It is advanced in Adding Nested Routing Examples.**
**Adding Nested Routes**
You can also add nested routes for more complex navigation structures.
`Dashboard.js`
```
import React from 'react';
import { Route, Link, useRouteMatch } from 'react-router-dom';
const Dashboard = () => {
let { path, url } = useRouteMatch();
return (
<div>
<h2>Dashboard</h2>
<ul>
<li>
<Link to={`${url}/profile`}>Profile</Link>
</li>
<li>
<Link to={`${url}/settings`}>Settings</Link>
</li>
</ul>
<Route path={`${path}/profile`} component={Profile} />
<Route path={`${path}/settings`} component={Settings} />
</div>
);
};
const Profile = () => <h3>Profile</h3>;
const Settings = () => <h3>Settings</h3>;
export default Dashboard;
```
**Routing **in **React** is essential for building modern web applications. With React Router, you can manage routes effortlessly and create dynamic, user-friendly interfaces. This guide covers the basics, but there’s much more to explore, such as dynamic routing, route guards, and custom hooks. Experiment with these concepts to build robust and scalable applications.
| sudhanshu_developer |
1,888,506 | Change FSM to pipeline | Hi guys, I'm a newbie in learning Verilog, I have written a simple FSM below, and now I wanna change... | 0 | 2024-06-14T11:43:00 | https://dev.to/yuri19/change-fsm-to-pipeline-22ef | Hi guys, I'm a newbie in learning Verilog, I have written a simple FSM below, and now I wanna change it using pipeline to increase the performance, but I'm so confused because I haven't learnt pipeline since I finished this FSM, can anyone help me to rewrite it using pipeline and tell me the difference between them, thanks in advance:
```
module processor (
input wire clk,
input wire rst
);
localparam FETCH = 3'b000, LOAD_INS = 3'b001, LOAD_MEM = 3'b010, STORE_RF = 3'b011, EXECUTE = 3'b100, STORE_RF_ALU = 3'b101, STORE_MEM = 3'b110;
wire [1:0] rf_readaddr1, rf_readaddr2, rf_write_addr;
wire [7:0] rf_write_data, rf_read_data1, rf_read_data2;
wire rf_we;
register_file RF (
.clk(clk),
.we(rf_we),
.read_addr1(rf_readaddr1),
.read_addr2(rf_readaddr2),
.write_addr(rf_write_addr),
.write_data(rf_write_data),
.read_data1(rf_read_data1),
.read_data2(rf_read_data2)
);
wire [7:0] alu_x, alu_y, alu_out;
wire alu_sl;
alu alu (
.clk(clk),
.x(alu_x),
.y(alu_y),
.alu_sl(alu_sl),
.alu_out(alu_out)
);
wire dm_we;
wire [1:0] dm_addr;
wire [7:0] dm_write_data, dm_read_data;
data_memory DM (
.clk(clk),
.we(dm_we),
.addr(dm_addr),
.write_data(dm_write_data),
.read_data(dm_read_data)
);
wire [3:0] pm_addr;
wire [7:0] pm_instr;
program_memory PM (
.clk(clk),
.addr(pm_addr),
.instr(pm_instr)
);
// State change
reg [2:0] state, next;
always @(*) begin
next = 2'bx;
case (state)
FETCH: begin
next = LOAD_INS;
end
LOAD_INS: begin
if (pm_instr[7:6] == 2'b10)
next = LOAD_MEM;
else if (pm_instr[7:6] == 2'b11)
next = STORE_MEM;
else next = EXECUTE;
end
LOAD_MEM: begin
next = STORE_RF;
end
STORE_RF: begin
next = FETCH;
end
EXECUTE: begin
next = STORE_RF_ALU;
end
STORE_RF_ALU: begin
next = FETCH;
end
STORE_MEM: begin
next = FETCH;
end
endcase
end
always @(posedge clk) begin
if (rst) begin
state <= FETCH;
end else begin
state <= next;
end
end
// fetch instruction
reg [3:0] pc;
reg [7:0] temp_ins;
always @(posedge clk) begin
if (rst) begin
pc <= 0;
end else begin
if (state == FETCH) pc <= pc + 1;
end
end
assign pm_addr = pc;
// load instruction
always @(posedge clk) begin
if (state == LOAD_INS) temp_ins <= pm_instr;
end
// state EXE
reg op;
always @(*) begin
op = 1'bx;
if (state == EXECUTE) begin
case(temp_ins[7:6])
2'b00: begin // ADD
op = 1'b0;
end
2'b01: begin // SUB
op = 1'b1;
end
endcase
end
end
assign alu_sl = op;
assign rf_readaddr1 = temp_ins[5:4];
assign rf_readaddr2 = temp_ins[3:2];
assign alu_x = rf_read_data1;
assign alu_y = rf_read_data2;
// memory signal assign
assign dm_we = (state == STORE_MEM);
assign dm_write_data = (state == STORE_MEM) ? rf_read_data1:0;
assign dm_addr = (state == LOAD_MEM || state == STORE_MEM) ? temp_ins[3:2]:2'b0;
// register file store
reg [7:0] write_data_rf;
always @(*) begin
write_data_rf = 8'bx;
case(state)
STORE_RF: begin
write_data_rf = dm_read_data;
end
STORE_RF_ALU: begin
write_data_rf = alu_out;
end
endcase
end
assign rf_write_data = write_data_rf;
assign rf_write_addr = (state == STORE_RF || state == STORE_RF_ALU) ? temp_ins[1:0]:2'b0;
assign rf_we = (state == STORE_RF || state == EXECUTE || state == STORE_RF_ALU);
endmodule
//Change it into pipeline by the simplest way (just add some blocks and register)
```
| yuri19 |
|
1,910,457 | Picking yourself up after a Vacation | About Me Hello, tech enthusiasts! Welcome to my blog. I’m a learner on an exciting journey... | 0 | 2024-07-03T17:12:55 | https://dev.to/vatsal_008/picking-yourself-up-after-a-vacation-1lf7 | programming, iot, algorithms, datastructures | ### About Me
Hello, tech enthusiasts! Welcome to my blog. I’m a learner on an exciting journey to revisit and solidify my coding concepts, brush up on Python fundamentals, and dive deep into the world of data science. Alongside this, I'll soon start documenting my BoltIoT project and aim to complete my BoltIoT training as soon as possible. Recently, I also had the opportunity to formulate marketing strategy for the company I am interning with, which was well appreciated.
### Scenic Break and Fresh Perspective
I took a refreshing vacation to the scenic beauty of Jammu. The break was rejuvenating, offering me a fresh perspective and renewed energy to tackle my learning goals. The serene landscapes and tranquil environment provided the perfect backdrop to reflect on my learning journey and plan my next steps.
### Revisiting Previous Concepts
When I logged in my systems after the trip, I was completely blank as if I wasn't learning anything before that, so I decided to revisit the concepts I had been through already. From the very basics:
- **Conditionals and Loops:** These are the building blocks of any programming language. Revisiting conditionals (if-else statements) and loops (for and while loops) was crucial in enhancing my problem-solving skills.
- **Pattern Problems:** Working on pattern problems then helped me understand nested loops better and develop logical thinking.
- **Binary to Decimal and Decimal to Binary Conversion:** These conversions are fundamental in understanding how computers process data.
- **Basics of Approaching Problems:** Learning how to break down a problem into manageable steps and approaching it methodically.
- **Basics of Arrays and Array Manipulations:** Understanding arrays and how to manipulate them (swapping, Pair sum, triplet sum) is essential for handling data efficiently.
- **Fundamentals of Functions and Match Case Statements:** Functions are vital for writing reusable code, and match case statements provide a clean way to handle multiple conditions.
- **Basics of Time and Space Complexities:** Grasping the basics of time and space complexities helps in writing efficient code and understanding the performance of algorithms.
### Continuing with Binary Search Questions
### Brushing Up on Python Fundamentals
Python is my language of choice, and revisiting its fundamentals has been crucial. Here are some key areas I’ve focused on:
- **Basic Syntax:** Understanding variables, data types, and operators.
- **Control Flow:** Mastering if-else statements, loops, and functions.
- **Data Structures:** Lists, tuples, sets, and dictionaries.
- **Modules and Packages:** Learning to import and utilize Python’s extensive libraries.
### BoltIoT Project and Training
I’m also documenting my BoltIoT project, which has been an exciting hands-on experience. The training is comprehensive, covering everything from setting up devices to creating IoT applications. I aim to complete my BoltIoT training soon and share detailed insights and learnings in upcoming posts. The project involves working with sensors, cloud platforms, and integrating various components to build a functional IoT system.
### Marketing Strategy Success
On the professional front, I recently formulated the main marketing strategy for the company I am interning with. My work was well appreciated, and it was a fantastic learning experience that complemented my technical pursuits. This experience taught me the importance of understanding market trends, consumer behavior, and crafting strategies that align with business goals.
### Looking Ahead
As I continue this journey, my focus will be on diving deeper into data science. Revisiting Python fundamentals has laid a solid foundation, and I’m excited to explore more advanced topics like data analysis, machine learning, and statistical modeling. I am not done with DSA yet, so with even more sincere focus I'll be grasping concepts Data Structures And Algorithms, I am Going to have to put a hold On the HTB Academy I was Exploring because the platter appears to be full just as of now, I do, however, will get back to it soon.
I will also be sharing more about my BoltIoT project and the insights I gain from completing the training.
Stay tuned for more updates as I continue this exciting journey in tech and IoT. Thank you for joining me, and I look forward to sharing more insights and experiences in my next post!
Stay curious and keep coding! | vatsal_008 |
1,910,456 | Baddiehub Reveals Fashion News: Staying Ahead of the Trends | Introduction In the ever-evolving world of fashion, staying ahead of the trends can be a challenge.... | 0 | 2024-07-03T17:11:04 | https://dev.to/baddies/baddiehub-reveals-fashion-news-staying-ahead-of-the-trends-33ok | baddieshub, baddiehub, news, fashion |
Introduction
In the ever-evolving world of fashion, staying ahead of the trends can be a challenge. **[Baddiehub Fashion Hub](https://baddiehub.news/)** has established itself as a beacon for fashion enthusiasts, offering the latest news, trends, and insights into the industry. By consistently revealing cutting-edge fashion news, Baddiehub keeps its audience informed and inspired. This article explores how Baddiehub reveals fashion news, the unique content it offers, and why it’s a go-to source for fashion aficionados.
The Importance of Fashion News
Fashion news plays a crucial role in the industry, influencing trends, consumer behavior, and the global market. By staying updated with fashion news, individuals can:
Stay Trendy: Keeping up with the latest trends ensures that your wardrobe is always current.
Make Informed Purchases: Understanding upcoming trends can help you make smarter buying decisions.
Gain Inspiration: Fashion news provides ideas for styling and incorporating new trends into your personal style.
Understand Industry Dynamics: Knowledge of industry changes and innovations can provide deeper insights into the fashion world.
Baddiehub’s Approach to Fashion News
Baddiehub Fashion Hub takes a comprehensive approach to delivering fashion news. Their content covers a wide array of topics, ensuring that their audience receives a well-rounded view of the industry.
Trend Reports
One of the key features of Baddiehub’s fashion news is its trend reports. These reports highlight the latest trends emerging in the fashion world, providing detailed insights and styling tips.
Seasonal Trends: [Baddiehub offers](https://baddiehub.news/) in-depth reports on seasonal trends, showcasing the must-have pieces for each season.
Runway Trends: Analysis of runway shows from major fashion weeks, highlighting key styles and designs.
Street Style Trends: Coverage of street style looks from fashion capitals around the world, offering real-life inspiration.
Designer Spotlights
Baddiehub’s designer spotlights focus on both established and emerging designers. These features provide insights into the designers’ creative processes, their latest collections, and their impact on the fashion industry.
Interviews: Exclusive interviews with designers, discussing their inspirations, challenges, and future plans.
Collection Reviews: Detailed reviews of new collections, highlighting standout pieces and overall themes.
Behind-the-Scenes: A look behind the scenes at the making of collections, providing a glimpse into the world of fashion design.
Industry News
Baddiehub keeps its audience informed about the latest developments in the fashion industry. From business news to technological advancements, their industry news section covers it all.
Market Trends: Analysis of market trends and consumer behavior, helping readers understand the economic aspects of fashion.
Sustainability Initiatives: Updates on sustainability efforts within the industry, showcasing brands that are making a difference.
Technological Innovations: News on the latest technological advancements in fashion, such as new materials, manufacturing techniques, and digital innovations.
Fashion Events
Baddiehub provides comprehensive coverage of major fashion events around the world. From fashion weeks to exclusive launches, they ensure that their audience is always in the loop.
Fashion Week Coverage: Detailed reports on fashion weeks from New York, Paris, Milan, and London, including runway highlights and backstage insights.
Launches and Pop-Ups: Information on new product launches, pop-up shops, and exclusive collaborations.
Awards and Galas: Coverage of major fashion awards and gala events, highlighting the best-dressed celebrities and key moments.
Style Guides
In addition to news and trends, Baddiehub offers practical style guides to help readers incorporate new trends into their wardrobes.
How-To Guides: Step-by-step guides on how to style specific trends and pieces.
Wardrobe Essentials: Lists of must-have items for each season and occasion.
Personal Styling Tips: Tips from fashion experts and influencers on creating unique and stylish looks.
Engaging Content Formats
Baddiehub employs a variety of content formats to keep their audience engaged and informed.
Articles and Blogs
In-depth articles and blogs provide detailed insights into various aspects of the fashion industry. These long-form pieces are well-researched and offer valuable information to readers.
Videos
Baddiehub’s video content includes fashion news updates, trend reports, and behind-the-scenes footage. These videos offer a dynamic and engaging way to consume fashion news.
Social Media
Baddiehub leverages social media platforms to share the latest news and trends. Their Instagram, TikTok, and Twitter accounts are filled with quick updates, styling tips, and interactive content.
Newsletters
For those who prefer curated content, Baddiehub offers newsletters that deliver the latest fashion news directly to their inbox. These newsletters provide a convenient way to stay updated with minimal effort.
Frequently Asked Questions (FAQs)
What type of fashion news does Baddiehub cover?
Baddiehub covers a wide range of fashion news, including trend reports, designer spotlights, industry news, and fashion event coverage. They provide comprehensive insights into all aspects of the fashion industry.
How often does Baddiehub update its fashion news?
Baddiehub updates its fashion news regularly to ensure that their audience stays informed about the latest developments. Their website and social media channels are frequently updated with new content.
Can I subscribe to Baddiehub’s fashion news?
Yes, Baddiehub offers newsletters that deliver the latest fashion news directly to your inbox. You can subscribe to their newsletter on their website to receive regular updates.
Does Baddiehub offer styling tips?
Absolutely! Baddiehub provides practical style guides and how-to articles to help readers incorporate new trends into their wardrobes. Their content includes expert tips and step-by-step guides.
Is Baddiehub’s fashion news suitable for all fashion enthusiasts?
Yes, Baddiehub’s fashion news caters to a diverse audience, from fashion novices to industry professionals. Their content is designed to be informative and inspiring for everyone.
Conclusion
Baddiehub Fashion Hub stands out as a premier source for fashion news, offering comprehensive and engaging content that keeps its audience ahead of the trends. From detailed trend reports and designer spotlights to industry news and style guides, Baddiehub provides everything a fashion enthusiast needs to stay informed and inspired. By consistently revealing cutting-edge fashion news, Baddiehub ensures that its audience is always in the know. Explore Baddiehub Fashion Hub today and stay ahead in the ever-changing world of fashion. | baddies |
1,910,455 | 🗓️ Day 15: Exploring Shapes and Tools in Figma 🎨 | 🗓️ Day 15: Exploring Shapes and Tools in Figma 🎨 👋 Hello, LinkedIn Community! I'm Prince Chouhan, a... | 0 | 2024-07-03T17:10:07 | https://dev.to/prince_chouhan/day-15-exploring-shapes-and-tools-in-figma-1ij9 | ui, uidesign, ux, uxdesign | 🗓️ Day 15: Exploring Shapes and Tools in Figma 🎨
👋 Hello, LinkedIn Community!
I'm Prince Chouhan, a B.Tech CSE student with a passion for UI/UX design. Today, I'm diving into the various tools and shapes in Figma and how they enhance our design process.
📚 Today's Learning Highlights:
Concept Overview:
Understanding and utilizing tools and shapes in Figma is crucial for efficient and effective design. These tools help in creating and manipulating design elements with precision.
Key Takeaways:
1️⃣ Move Tool:
🔸 Allows you to move elements around the canvas effortlessly. Shortcut: V
2️⃣ Scale Tool:
🔸 Enables scaling of elements. Shortcut: K
3️⃣ Frame Tool:
🔸 Essential for creating artboards where all design elements are placed. Shortcuts: F or A
4️⃣ Section Tool:
🔸 Helps organize frames into specific sections for better workflow management.
5️⃣ Slice Tool:
🔸 Specifies areas for export. Not frequently used but useful.
Shape Tools:
🔹 Rectangle:
- Used for creating basic rectangular shapes.
🔹 Line:
- Creates lines useful for dividers and other elements.
🔹 Arrow:
- Functions like a line but with an arrowhead.
🔹 Ellipse:
- Creates circles and ellipses. Holding Shift ensures a perfect circle.
🔹 Polygon:
- Generates polygons with adjustable edges.
🔹 Star:
- Creates star shapes with customizable points.
🔹 Place Image/Video:
- Allows for inserting images and videos into the design.
Challenges:
🔸 Remembering shortcuts for efficiency.
🔸 Understanding and utilizing each tool to its full potential.
Solution:
- Practice and Familiarity:
🔹 Regular use and practice help in memorizing shortcuts and understanding the functionality of each tool.
Practical Application:
1. Designing Frames:
- Start with the Frame tool to set up artboards for your projects.
2. Using Shapes:
- Combine simple shapes to create complex designs.
- Utilize the Ellipse tool for circles and the Polygon tool for badges.
3. Organizing Elements:
- Use the Section tool to keep related frames together, like login flows or different screens of an app.
🔍 In-Depth Analysis:
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{% embed https://youtu.be/yxvu3TC5U1A %}
## Importance of upgrading frameworks
Given Angular's current state, staying up to date is often a technical challenge. The main challenge, though, is persuading your manager and colleagues to change.
Sonu Kapoor wrote an article that presents arguments for upgrading and provides examples, such as potential security breaches, better developer experience, and performance improvements - Ivy, but also Signals, zoneless, hydration, etc.
Sonu's article serves as a good foundation for your next discussion. If that's still not enough, you can always bring up Google as an example.
According to Minko Gechev, Google runs around 4,500 Angular applications internally on the latest version.
{% embed https://dev.to/this-is-angular/the-importance-of-upgrading-frameworks-a-case-for-angular-5c91 %}
## TinyConf
TinyConf, a remote-only conference about Angular, took place. The conference lasted one day, and the talks were around 25 minutes long. In total, there were 23 talks, and given that amount, every topic was covered. The recording is available on YouTube.
{% embed https://www.youtube.com/watch?v=nVcerb1tOUA %}
## Ng-Belgrade
Another conference, ng-Belgrade, started publishing its recordings on YouTube as well—not all at once but over the next weeks. Ng-Belgrade happened already in May.
{% embed https://www.youtube.com/@AngularBelgrade/videos %}
## Playwright 1.45
Playwright, a popular E2E testing framework, was released in 1.45. Like TypeScript, it does not follow schematic versioning.
Playwright comes with a new feature called clock that allows you to control time. Clock overrides the Date class and common timing functions like setInterval, requestIdleCallback, and more.
https://github.com/microsoft/playwright/releases | ng_news |
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In the rapidly changing world of technology and consumer behavior, digital marketing has emerged as an indispensable tool for businesses seeking to connect with their audiences. From the early days of simple email campaigns to the sophisticated, multi-channel strategies of today, digital marketing has continuously evolved, offering new opportunities and challenges for marketers. This article explores the history, current trends, and future directions of digital marketing, highlighting its importance in the modern business landscape.
**The Birth of Digital Marketing**
Digital marketing began to take shape in the 1990s with the advent of the internet. The introduction of email as a communication tool opened new avenues for marketers. The first recorded instance of email marketing was a campaign sent by Gary Thuerk in 1978 to promote DEC machines, which resulted in $13 million in sales. This event marked the beginning of a new era in marketing.
As the internet grew, so did the possibilities for digital marketing. The launch of search engines like Yahoo and Google in the mid-1990s revolutionized the way people found information online, giving rise to search engine optimization (SEO). By the early 2000s, social media platforms like Friendster, MySpace, and later Facebook and Twitter, began to change the landscape again, providing new ways for businesses to engage with their audiences.
The introduction of e-commerce platforms like Amazon and eBay in the late 1990s also played a crucial role in shaping digital marketing. These platforms not only created new opportunities for online sales but also set the stage for advanced marketing techniques such as product recommendations, customer reviews, and targeted advertising.
**Early Innovations and Milestones**
Banner Ads and the Rise of Online Advertising: The first clickable banner ad appeared in 1994, created by AT&T and displayed on the HotWired website. This simple innovation sparked a new era of online advertising, leading to the development of various ad formats and targeting strategies that are now integral to digital marketing.
Search Engine Marketing (SEM): With the proliferation of websites, the need to stand out in search results became crucial. Google AdWords, launched in 2000, provided businesses with the ability to bid on keywords and display ads to users based on their search queries. This pay-per-click (PPC) model became a cornerstone of online advertising.
The Social Media Revolution: The emergence of social media platforms in the mid-2000s transformed how people interacted online. Facebook, launched in 2004, quickly became a dominant platform, followed by Twitter in 2006 and Instagram in 2010. These platforms offered new ways for brands to connect with audiences through organic content and paid advertising.
**Key Components of Digital Marketing
**
Digital marketing encompasses a variety of strategies and tactics, each with its own strengths and applications. The primary components include:
Search Engine Optimization (SEO):
SEO involves optimizing a website's content and structure to rank higher in search engine results, increasing organic traffic.
On-Page SEO: Includes optimizing individual web pages for specific keywords, improving site speed, and ensuring mobile-friendliness.
Off-Page SEO: Focuses on building backlinks from reputable sites to increase the website's authority and search ranking.
Content Marketing:
This strategy focuses on creating and distributing valuable, relevant content to attract and retain a target audience. Examples include blogs, videos, infographics, and whitepapers.
Case Study: HubSpot is a prime example of a company that has successfully utilized content marketing. Through its blog posts, eBooks, and webinars, HubSpot educates its audience and generates leads.
Social Media Marketing:
Utilizing platforms like Facebook, Instagram, Twitter, and LinkedIn to engage with audiences, build brand awareness, and drive traffic.
Examples: Brands like Wendy's and Nike have mastered social media marketing, using creative content and interactive campaigns to engage their followers.
Email Marketing:
Sending targeted emails to prospects and customers to nurture relationships, promote products, and drive conversions.
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Pay-Per-Click (PPC) Advertising:
Using platforms like Google Ads and Facebook Ads to display ads to a targeted audience, where advertisers pay each time an ad is clicked.
Ad Formats: PPC includes search ads, display ads, video ads, and shopping ads. Every format has special benefits and applications.
Affiliate Marketing:
Partnering with other businesses or influencers to promote products or services in exchange for a commission on sales generated through their efforts.
Example: Amazon's Affiliate Program allows individuals to earn commissions by promoting Amazon products on their websites or social media channels.
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Collaborating with influencers who have a large following to promote products or services, leveraging their credibility and reach.
Case Study: Fashion brand Revolve has successfully used influencer marketing to reach a wider audience and drive sales, often collaborating with popular Instagram personalities.
**Current Trends in Digital Marketing**
The digital marketing landscape is continuously evolving, with new trends emerging regularly. Several contemporary trends influencing the industry are as follows:
Artificial Intelligence (AI) and Machine Learning:
AI is revolutionizing digital marketing by facilitating more effective and customized consumer interactions. Chatbots, predictive analytics, and automated content creation are just a few examples of AI applications in marketing.
Example: Netflix uses AI algorithms to recommend content based on users' viewing history, enhancing user experience and engagement.
Voice Search Optimization:
With the rise of voice-activated devices like Amazon Echo and Google Home, optimizing content for voice search is becoming increasingly important. This trend emphasizes the need for conversational keywords and natural language processing.
Impact: Businesses need to adapt their SEO strategies to ensure they appear in voice search results, often focusing on long-tail keywords and FAQ-style content.
Video Marketing:
Video content continues to dominate digital marketing, with platforms like YouTube, TikTok, and Instagram driving massive engagement. Live streaming and short-form videos are particularly popular.
Best Practices: Brands should create engaging, high-quality video content that resonates with their audience. Interactive elements, such as polls and Q&A sessions, can enhance viewer engagement.
Social Commerce:
Social media platforms are integrating e-commerce features, allowing users to purchase products directly from the app. The distinction between social networking and online purchasing is becoming more and more hazy.
Example: Instagram's Shop feature enables brands to create a virtual storefront, making it easy for users to browse and buy products without leaving the app.
Data Privacy and Security:
As concerns over data privacy grow, marketers must navigate regulations like GDPR and CCPA while maintaining transparency and building trust with consumers.
Challenge: Balancing personalized marketing with respect for user privacy is critical. Brands need to be transparent about data usage and provide options for users to control their information.
Augmented Reality (AR) and Virtual Reality (VR):
AR and VR are creating immersive experiences for customers, from virtual try-ons in fashion to interactive product demos in retail.
Example: IKEA's AR app allows users to visualize how furniture will look in their home, enhancing the shopping experience and reducing the likelihood of returns.
**The Future of Digital Marketing
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As technology continues to advance, the future of digital marketing looks promising, with several key trends expected to shape the industry:
**Hyper-Personalization
**With the increasing availability of data and advances in AI, marketers will be able to deliver highly personalized experiences to consumers, tailoring content, offers, and interactions to individual preferences and behaviors.
Future Outlook:
AI-driven personalization will go beyond simple recommendations, potentially offering real-time customization of web pages and content based on user behavior. For example, an e-commerce website might use AI to analyze a visitor's browsing history, purchase patterns, and real-time actions on the site to dynamically change the homepage layout, featured products, and promotional offers to suit that individual's interests. This level of personalization can lead to higher engagement rates, improved customer satisfaction, and increased conversion rates.
Advanced AI Techniques:
AI and machine learning algorithms can analyze vast amounts of data from various sources, including social media activity, past purchases, and even biometric data. This analysis enables businesses to predict future behavior and needs, allowing for proactive marketing strategies. For instance, Netflix uses AI to suggest movies and shows based on viewing history, and Amazon recommends products based on past purchases and browsing behavior. In the future, AI could also be used to create personalized video ads, tailor-made for individual viewers based on their preferences and online behavior.
**Integrated Marketing Strategies**
The future will see more seamless integration of various marketing channels, creating cohesive and consistent brand experiences across touchpoints.
Example: Omnichannel marketing strategies that unify online and offline interactions, ensuring a smooth customer journey from initial contact to purchase. This means a customer can begin their journey on a social media platform, receive personalized email offers, and finally make a purchase in-store, all while receiving a consistent brand message and experience. Retailers like Starbucks have successfully implemented omnichannel strategies, allowing customers to order and pay through their mobile app, earn rewards, and pick up their orders in-store, creating a seamless encounter that connects the virtual and physical realms.
Advanced Integration Techniques:
Businesses will use Customer Data Platforms (CDPs) to gather and analyze customer data from multiple sources, enabling a more comprehensive understanding of customer behavior and preferences. This data will be used to create unified customer profiles, ensuring that all marketing channels—from email and social media to in-store interactions—are aligned and working together to provide a cohesive experience. Marketing automation tools will also play a crucial role in managing these integrated campaigns, allowing for more efficient and effective communication with customers.
Blockchain Technology
Blockchain has the potential to revolutionize digital marketing by enhancing transparency, reducing ad fraud, and enabling secure and efficient transactions.
Use Case: Blockchain can ensure the authenticity of digital advertisements, making it easier to track and verify ad performance and payments. This technology can address issues such as ad fraud, where fake clicks or impressions can inflate advertising costs without delivering real value. By using blockchain, marketers can create a transparent and immutable ledger of all ad interactions, ensuring that every click, impression, and conversion is genuine and accounted for.
Beyond Advertising:
Blockchain can also improve data privacy and security, allowing consumers to have more control over their personal information. For example, a decentralized data marketplace could enable consumers to sell their data directly to marketers, ensuring they are compensated fairly and that their data is used transparently. Additionally, blockchain can facilitate secure and efficient transactions in affiliate marketing, ensuring that affiliates are accurately compensated for the traffic and sales they generate.
Sustainable Marketing
As environmental concerns rise, brands will need to adopt sustainable marketing practices, emphasizing eco-friendly products and corporate social responsibility.
Trend: Consumers are increasingly valuing sustainability, and brands that demonstrate a commitment to environmental and social issues will gain a competitive edge. Companies like Patagonia and TOMS have built their brands around sustainability and social responsibility, attracting a loyal customer base that values these principles.
Sustainable Practices:
Businesses can adopt various sustainable marketing practices, such as reducing their carbon footprint, using eco-friendly packaging, and promoting ethical sourcing of materials. Additionally, marketers can focus on creating campaigns that highlight the positive environmental and social impact of their products. For example, a clothing brand might promote its use of organic cotton and fair-trade practices, while a tech company could highlight its efforts to reduce electronic waste and improve energy efficiency.
Corporate Social Responsibility (CSR):
Brands that integrate CSR into their marketing strategies can build stronger relationships with consumers and differentiate themselves from competitors. This includes supporting charitable causes, engaging in community projects, and promoting sustainable business practices. By communicating these efforts transparently and authentically, brands can enhance their reputation and build trust with their audience.
5G Technology
The rollout of 5G will enable faster internet speeds and lower latency, allowing for more dynamic and interactive digital marketing experiences.
Impact: Enhanced mobile experiences, such as high-quality video streaming and augmented reality applications, will become more accessible and widespread. With 5G, marketers can create immersive and engaging experiences that were previously impossible due to bandwidth limitations. For example, Customers can virtually try on outfits or see how furniture would appear in their house by using virtual reality (VR) and augmented reality (AR) experiences to exhibit things in a more dynamic way.
Advanced Applications:
5G will also enable the Internet of Things (IoT), connecting a wide range of devices and allowing for more personalized and context-aware marketing. For instance, a smart refrigerator could suggest recipes based on its contents and offer coupons for missing ingredients, or a wearable fitness tracker could recommend health products based on the user's activity levels.
Real-Time Marketing:
With the increased speed and reduced latency of 5G, marketers can deliver real-time experiences and interactions. Live streaming events, instant customer support, and real-time offers based on location data will become more prevalent, enhancing customer engagement and satisfaction. Additionally, the ability to collect and analyze data in real-time will enable more precise targeting and personalized marketing efforts.
**Conclusion**
Digital marketing has come a long way since its inception, evolving in response to technological advancements and changing consumer behaviors. Today, it is a critical component of any successful business strategy, offering numerous ways to connect with and engage audiences. As [we](http://digitalmantra.byethost32.com/) look to the future, digital marketing will continue to innovate, leveraging new technologies and trends to drive growth and create value for businesses and consumers alike. Embracing these changes and staying ahead of the curve will be essential for marketers aiming to thrive in this dynamic landscape.
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| piyenag121 |
1,910,449 | Web Accessibility | Introduction Importance of Web Accessibility Web accessibility ensures that... | 0 | 2024-07-03T17:01:30 | https://dev.to/vickychi/web-accessibility-458p | webdev, beginners, html | ##Introduction
###Importance of Web Accessibility
Web accessibility ensures that websites are usable by everyone, including those with disabilities like vision impairment or motor disabilities. It involves creating websites that can be navigated, understood, and interacted with by all users, regardless of their abilities or the devices they use. By implementing web accessibility, businesses can reach a wider audience, improve user experience, and demonstrate inclusivity and social responsibility. It's about making the web a more accessible and equitable place for all users, ensuring everyone can access information and services online without barriers.
###0verview of accessibility standards like WCAG
[WCAG (Web Content Accessibility Guidelines)](https://allyant.com/wcag-2-2-explained-everything-you-need-to-know-about-web-content-accessibility-guidelines-2-2/?gad_source=1&gclid=Cj0KCQjw7ZO0BhDYARIsAFttkChCUc_MpyBb8BpzwWInm0QQNB8BcQ8yua6UXlTdgeWAfj2pdKqnOiUaAjojEALw_wcB) are standards that ensure websites and digital content are accessible to all users, including those with disabilities. They provide guidelines on how to design and develop content that is perceivable (e.g., text alternatives for images), operable (e.g., keyboard accessible), understandable (e.g., clear navigation), and robust (e.g., compatible with assistive technologies). These standards help make the web more inclusive by addressing various disabilities and ensuring everyone can access and interact with online information effectively. WCAG guidelines are widely recognized and adopted globally to promote accessible web design and development practices.
##Key Accessibility Principles
###Semantic [HTML](https://www.w3schools.com/html/) and its role in accessibility
Semantic HTML refers to using proper HTML tags (like `<header>`, `<nav>`, `<article>`, `<footer>`) to convey the meaning and structure of content on a webpage. This helps screen readers and other assistive technologies understand and present the content accurately to users with disabilities. By using semantic HTML, developers ensure that websites are more accessible and easier to navigate for everyone, including those who rely on assistive devices.
###Importance of keyboard navigation and focus management
Keyboard navigation and focus management are crucial for ensuring that websites are accessible to everyone, especially those who rely on keyboards or assistive technologies. Proper keyboard navigation allows users to navigate through a site without a mouse, improving usability for people with disabilities or limited mobility. Focus management ensures that users can easily see where they are on a page and navigate content efficiently, enhancing overall user experience and inclusivity.
##Common Accessibility Features
###Alt text for images and its significance
Alt text (alternative text) for images is important because it describes the content and function of images on a webpage. For users who cannot see images, such as those using screen readers or with slow internet connections, alt text provides a textual alternative. This helps them understand the context and purpose of the image within the content. Additionally, search engines rely on alt text to understand and index images, which can improve website visibility in search results. Properly written alt text enhances accessibility, improves user experience for all visitors, and supports SEO efforts by making web content more accessible and understandable.
###Ensuring color contrast for readability.
Ensuring good color contrast is crucial for making text and images readable to everyone. It involves using colors that have enough difference between them to be easily distinguishable. This is especially important for people with visual impairments or when viewing screens in bright environments. Guidelines recommend a strong contrast ratio between text and background colors to ensure readability. By following these guidelines, websites become more accessible and user-friendly, as everyone can comfortably read and understand the content without straining their eyes or having difficulty distinguishing between different elements on the page.
##Testing and Tools
###accessibility testing tools (e.g., WAVE, Axe).
Accessibility testing tools like [WAVE and Axe](https://blog.scottlogic.com/2023/09/27/accessibility-tooling-wave-vs-axe.html) are essential for ensuring websites are accessible to all users. WAVE evaluates web pages for accessibility issues by highlighting potential problems such as missing alternative text for images or improper heading structures. It provides clear visual feedback and suggestions for improvements. Similarly, Axe helps developers find and fix accessibility issues by running automated tests and providing detailed reports. These tools are user-friendly, requiring no technical expertise to use effectively. They help web developers identify and rectify accessibility barriers, ensuring compliance with accessibility standards like WCAG. By using these tools, websites can accommodate users with disabilities, providing a better browsing experience for everyone. Regular testing with such tools ensures that accessibility remains a priority throughout the development process, enhancing inclusivity and usability of web content.
###How to use tools to identify and fix accessibility issues.
To use accessibility tools effectively, start by entering your website's URL into the tool's interface. The tool will then scan your site and highlight any accessibility issues it finds, such as missing alt text for images or poor color contrast. Each issue is explained in simple terms, often with suggestions on how to fix it. To address these issues, follow the tool's recommendations, which might include adding alt text to images or adjusting color settings. Once fixes are made, re-run the tool to ensure issues are resolved. Regular use of these tools helps ensure your website is accessible to all users, regardless of ability.
##Practical Tips for Implementation
###Improving form accessibility with labels and error handling
Improving form accessibility involves adding clear labels to form fields so users know what information to input. Labels should be descriptive and placed next to each input field. Error handling is crucial; it provides clear messages when users make mistakes and guides them on how to correct errors. This helps all users, especially those using assistive technologies, navigate forms easily. By ensuring labels are properly associated with form elements and errors are clearly communicated, websites become more accessible and user-friendly. Testing forms with accessibility tools ensures they meet standards, making the online experience smoother for everyone.
###Structuring content with headings and landmarks
Structuring content with headings and landmarks organizes information on web pages. Headings (like chapter titles) break content into sections, making it easier to navigate. Landmarks (like signposts) identify major areas, such as navigation menus or main content sections. This helps all users, especially those using screen readers, quickly find and understand the layout of a webpage. By using headings and landmarks effectively, websites become more accessible and user-friendly. Testing with accessibility tools ensures these elements are correctly implemented, enhancing the browsing experience for everyone.
##Conclusion
In conclusion, ensuring web accessibility is crucial for making sure that all users, regardless of their abilities, can access and interact with websites effectively. By implementing practices like using descriptive alt text for images, maintaining good color contrast for readability, and providing keyboard navigation options, websites become more inclusive and user-friendly. Accessibility testing tools like WAVE and Axe play a key role in identifying and fixing issues, ensuring compliance with accessibility standards like WCAG. By prioritizing accessibility, websites not only accommodate users with disabilities but also improve overall usability for everyone. It's important for web developers and designers to integrate accessibility into their workflows from the start, promoting equal access to information and services online. By fostering a more inclusive web environment, we can enhance the digital experience for all users, contributing to a more accessible and equitable online world.
| vickychi |
1,910,447 | Discover the Power of Digital Marketing with Techaura: Your Partner in Success | Today, businesses are striving to be unique in the overcrowded internet world. It is a fierce... | 0 | 2024-07-03T17:00:30 | https://dev.to/digital_aura_0298ffa0d515/discover-the-power-of-digital-marketing-with-techaura-your-partner-in-success-3jee | seo, contentwriting, googleads, socialmediamarketing | Today, businesses are striving to be unique in the overcrowded internet world. It is a fierce competition. A beautiful website alone will not do this. At this stage, _**Best Digital Marketing Agency in Allahabad**_, Techaura comes into play. We know your company’s pain points and have all-inclusive strategies that will ensure you survive and flourish as a brand in the digital arena.
**The Struggle of Modern Businesses
**
These problems are similar for many firms, irrespective of size:
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These hurdles can make any entrepreneur feel frustrated and overwhelmed. But you don’t have to navigate these waters alone. Techaura, Best Digital Marketing Agency in Allahabad can help you overcome these challenges.
Our All-inclusive Digital Marketing Solutions
Techaura has a variety of services for you to choose from:
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**
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**
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**
Successful online marketing depends on high-quality content. Our professional writing team designs captivating and educative pieces that capture the tone of your brand and draw your audience to it. Our well-thought-out contents range from articles on blogs to texts for websites, which will be browsed by many people and get them buying.
**Web Development
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Having an attractive site is crucial in making a good first impression. At Techaura, we develop mobile-friendly websites with easy-to-navigate interfaces that showcase the unique qualities of your brand. Be sure that our company is the [Best Digital Marketing Agency in Allahabad](https://techaura.in/), which means you are going to get a website that stands apart from its rivals.
**Google Ads
**
Pay-per-click (PPC) advertising can help you obtain immediate traffic for your website. That is why our Google Ads experts create relevant campaigns with the best ROI so that ads reach the right audiences at the right moments. When we take over your digital marketing operations, you will see increased conversions and visibility of your business.
**Why Choose Techaura?
**
Selecting the right digital marketing company can be the ticket to the success of your business. Here’s why Techaura is the [Best Digital Marketing Agency in Allahabad](https://techaura.in/):Here’s why Techaura is the Best Digital Marketing Agency in Allahabad:
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| digital_aura_0298ffa0d515 |
1,909,086 | ✨ CSS Evolves - Discover Inline if() & CSS Flow Charts | Hey 👋 This weeks newsletter is packed full of great reads and resources here's a quick look: 🔤... | 0 | 2024-07-03T17:00:00 | https://dev.to/adam/css-evolves-discover-inline-if-css-flow-charts-293d | css, ux, webdev, javascript |
**Hey** 👋 This weeks newsletter is packed full of great reads and resources here's a quick look:
🔤 Beyond Monospace
👁️ Recognizing Dark Patterns
⚙️ JavaScript on Steroids
Enjoy & stay inspired 👋 - Adam at Unicorn Club.
---
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---
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## 🌅 CSS
[**Opinions for Writing Good CSS**](https://andrewwalpole.com/blog/opinions-for-writing-good-css/?utm_source=unicornclub.dev&utm_medium=newsletter&utm_campaign=unicornclub.dev&ref=unicornclub.dev)
While it’s easy to learn the parts: selectors, properties, etc. It’s much tougher to practically compose multiple ideas together to make something new or more complex happen.
[**Inline conditionals in CSS?**](https://lea.verou.me/blog/2024/css-conditionals/?utm_source=unicornclub.dev&utm_medium=newsletter&utm_campaign=unicornclub.dev&ref=unicornclub.dev)
Last week, we had a CSS WG face-to-face meeting in A Coruña, Spain. There is one resolution from that meeting that I’m particularly excited about: the consensus to add an inline if() to CSS.
[**Flow Charts with CSS Anchor Positioning**](https://coryrylan.com/blog/flow-charts-with-css-anchor-positioning?utm_source=unicornclub.dev&utm_medium=newsletter&utm_campaign=unicornclub.dev&ref=unicornclub.dev)
With the introduction of the CSS Anchor Position API in Chrome 125, it's never been easier to position an element relative to another element.
[**Learn Grid Now, Container Queries Can Wait**](https://www.oddbird.net/2024/06/13/css-layout/?utm_source=unicornclub.dev&utm_medium=newsletter&utm_campaign=unicornclub.dev&ref=unicornclub.dev)
Several people have asked recently why container queries aren’t being used more broadly in production. But I think we underestimate the level of legacy browser support that most companies require to re-write a code-base.
---
### **💭 Fun Fact**
******The Birth of Courier****** - One of the most iconic monospaced fonts, Courier, was designed by Howard "Bud" Kettler in the early 1950s. Originally created for IBM's typewriters, Courier has become a staple in the digital age for its clean, typewriter-like appearance.
---
## 🔘 Design + UX
[**Dark Patterns Hall of Shame**](https://hallofshame.design/?utm_source=unicornclub.dev&utm_medium=newsletter&utm_campaign=unicornclub.dev&ref=unicornclub.dev)
Protect your online privacy and rights by learning about dark patterns and unethical designs. Stay informed and avoid manipulation in the digital world.
[**Beyond monospace: the search for the perfect coding font**](https://evilmartians.com/chronicles/beyond-monospace-the-search-for-the-perfect-coding-font?utm_source=unicornclub.dev&utm_medium=newsletter&utm_campaign=unicornclub.dev&ref=unicornclub.dev)
What makes a font suitable for writing code? Back in 2021, when I started working on Martian Mono—the Evil Martians font for programming — I naively believed it was just a matter of making all characters the same width, and maybe including some code ligatures.
## 🟨 JS
[**Advanced JavaScript Performance Optimization: Techniques and Patterns**](https://dev.to/parthchovatiya/advanced-javascript-performance-optimization-techniques-and-patterns-26g0?utm_source=unicornclub.dev&utm_medium=newsletter&utm_campaign=unicornclub.dev&ref=unicornclub.dev)
This post dives into advanced techniques and patterns to elevate your JavaScript performance and ensure your applications run smoothly even under heavy loads.
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1,910,446 | Animated landing page with gradient overlay | In this tutorial we going to build animated landing page which will dynamically change the content... | 0 | 2024-07-03T16:58:13 | https://dev.to/frontendblond/animated-landing-page-with-gradient-overlay-1l05 | webdev, javascript, css, html | In this tutorial we going to build animated landing page which will dynamically change the content base on user interaction. The tutorial use only plain HTML, CSS, JavaScript, so no dependencies and frameworks are needed just your favorite IDE / text editor and passion & time to learn something new.
Our landing page will be a fictional project dedicated to the majestic animals of the African savannas. Who doesn't like animals, right? 🦏 🦒
Feel free to adjust this project to your preferences.Unleash your creativity and adapt it to your needs, whether it be Marvel/DC superheroes, Pokémon, your favorite sports stars, or even for presenting products.
---
[**Final result here**](https://jimmzzz.github.io/projects/animated-landing-page-finished/index.html)
---
### Tutorial structure
In the first section, we will set our background image and apply an overlay filter to it. This filter will decrease the brightness of the image, enabling us to place text on it with improved contrast and readability. By doing this, we ensure that the text stands out clearly against the background, making the content more accessible and visually appealing. We also add gradient to make our page even more attractive.
The second section is dedicated to our "jumbotron" navigation, which serves as the prominent navigation element on the webpage.
This section is designed to draw user's attention, ensuring that they focus on the most important content.By utilizing a jumbotron, we can highlight important content, announcements, or CTA (call to action), ensuring they are immediately visible to visitors.This enhances the overall user experience by making navigation intuitive and visually engaging.
In the final section, we will create an article section that slides in upon user interaction. This dynamic feature will enhance user engagement by providing an interactive and visually appealing way to present content. Sliding animations can capture attention and make the browsing experience more enjoyable.
## Table of content
1. Background image with overlay filter and gradient
2. Jumbotron navigation
3. Article section
## Setup
The starting point for this mini project can be found in this [Github repo](https://github.com/jimmzzz/jimmzzz.github.io/tree/main) in the "projects" folder, where you can also find the final code for this tutorial.
Before we start coding, let's set up our really simple project.
We will need one file for our HTML markup called `index.html`, a CSS file, and a JavaScript file.
First, we will create the HTML file, where we will link our CSS file `styles.css` and create and import our JavaScript file `index.js`, which will be empty for now. Feel free to copy and paste this.
I would like to point out the `<link rel="preload" ... />` tag in the header section.
This tells the browser to load resources (in our case images) as soon as possible, before they are found in the DOM or required by JavaScript.
As a result, the images will be ready immediately when they are needed by JavaScript, which will be handy later in our tutorial.
> TIP: Learn more about preloading in [Google dev (preloading)](https://web.dev/articles/preload-responsive-images)
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link
href="https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.1/normalize.min.css"
rel="stylesheet"
/>
<link rel="preload" href="./img/rhino.jpg" as="image" />
<link rel="preload" href="./img/zebra.jpg" as="image" />
<link rel="preload" href="./img/lion.jpg" as="image" />
<link rel="stylesheet" href="./styles.css" />
<script src="./index.js" defer></script>
<title>Animated landing page</title>
</head>
<body>
<!-- our code will be here -->
</body>
</html>
```
In the root of our directory create `styles.css` file.
We will import a font called **Poppins** from [Google fonts](https://fonts.google.com/specimen/Poppins?query=poppins) and set CSS variable for the text color and our initial background image. Nothing extra special going on here.
```css
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;700&display=swap');
:root {
--text-primary: white;
--background-image: url('./img/rhino.jpg');
}
body {
font-family: 'Poppins', sans-serif;
margin: 0;
padding: 0;
}
```
---
## Background image
First, we will start with our background. We want our background image to be below our content. To achieve this, we will add a `<main>` element with the class `.content`.
We will compose our background in layers. If you are familiar with graphical software such as Adobe Photoshop, this follows the same concept, and we will achieve this using z-index.
We need to do this in order to apply a **grayscale filter** and a **gradient effect**.
First, we will declare styles for our bottom layer using the pseudo-element `.content:before`.
The important part is to set it to a lower `z-index` than the following layers.
We will also set the background image and some other background properties to center our image and cover the whole page.
The interesting part is `filter: grayscale(100%)`, which turns our image black and white.
> A pseudo-element in CSS is a keyword added to a selector that lets you style a specific part of the selected element. Common examples include ::before and ::after, which allow you to insert content before or after the content of an element, respectively. These are useful for adding decorative content or additional styling without altering the HTML structure. - (chatgpt - definition)
```html
<body>
<main class="content">
<!-- content will be here -->
</main>
</body>
```
```css
.content:before {
position: fixed;
content: "";
left: 0;
right: 0;
z-index: -2;
display: block;
width: 100vw;
height: 100vh;
background-image: var(--background-image);
background-size: 100% 100%;
background-position: center;
background-repeat: no-repeat;
filter: grayscale(100%);
transition: background-image 1s 0.2s ease-in-out;
}
```
As a next step we will set our gradient. At the top of our `styles.css` file declare following CSS variables for our gradient.
```css
:root {
--text-primary: white;
--background-image: url('./img/rhino.jpg');
--gradient-color-first: rgba(0, 0, 0, 0.7);
--gradient-color-second: rgba(0, 0, 0, 0.5);
}
```
Next, we need to set the `.content::after` pseudo-element. Our gradient will go from the top to the bottom, and for now, we will set a black gradient. Later on, I will show you how to modify the gradient. The gradient helps improve the readability of the white text that we will add later.
> TIP: If you ever need place some text on a image and text is hard to read then gradient or overlay are great tools to add some contrast.
```css
.content:after {
position: fixed;
content: "";
left: 0;
top: 0;
z-index: -1;
display: block;
width: 100vw;
height: 100vh;
background: linear-gradient(
var(--gradient-color-first),
var(--gradient-color-second)
);
}
```
And last but not least, we have to define our final layer, which will be on top and thus have the highest `z-index`. In our case we set `z-index: 0`. Now we should see black & white background image with rhinos.
```css
.content {
position: fixed;
left: 0;
top: 0;
z-index: 0;
width: 100vw;
height: 100vh;
color: var(--text-primary);
}
```
---
### Customize your gradient - optional step
This step is optional. We will customize the gradient of our background image. You will see how different colors can dramatically change the overall feeling and atmosphere of the presented content.
In the snippet below, you can find preset colors, but feel free to choose the color you prefer.
However, I strongly recommend picking a saturated color and keeping the **alpha** (opacity) between **0.5 and 0.7** to preserve contrast and readability of the content.
> rgba(red, green, blue, alpha)
All you need to do to apply your custom gradient is to override the CSS variable:
`--gradient-color-second`.
**Here you can see some gradients for inspiration**
```css
:root {
--text-primary: white;
--background-image: url('./img/rhino.jpg');
--gradient-color-first: rgba(0, 0, 0, 0.7);
--gradient-color-second: rgba(0, 0, 0, 0.7);
// color presets - feel free to pick & try
--gradient-color-second: rgba(0, 204, 255, 0.7); // 1. cyan
--gradient-color-second: rgba(255, 0, 200, 0.7); // 2. magenta
--gradient-color-second: rgba(255, 247, 0, 0.7); // 3. yellow
--gradient-color-second: rgba(0, 255, 195, 0.7); // 4. green
--gradient-color-second: rgba(255, 136, 0, 0.7); // 5. orange
--gradient-color-second: rgba(0, 136, 255, 0.7); // 6. blue
}
```
---
## Jumbotron navigation
Let's move to the second main section called **jumbotron navigation**.
A "jumbotron" is a large, prominent component used in web design. It is typically designed to grab the user's attention.
In our case, the jumbotron navigation will contain animal names, and the user will be able to switch between active items. When the user clicks an animal name, we will switch the currently selected animal and also change the page background to the respective animal.
First of all, we will create `.grid-container` nested inside the `.content`. The container will contain two equally sized part `.left` and `.right`. On the left side there will be the jumbotron navigation and on the right side, there will be our short article about the animal.
If you look at our navigation items markup you will see, there is defined `id` attribute and custom attributes `data-index`. We will use both attributes in our javascript to access correct elements.
```html
<main class="content">
<div class="grid-container">
<div class="left">
<nav class="jumbo-nav">
<a class="jumbo-nav__item jumbo-nav__item--active" data-index="0" id="rhino">Rhino</a>
<a class="jumbo-nav__item" data-index="1" id="zebra">Zebra</a>
<a class="jumbo-nav__item" data-index="2" id="lion">Lion</a>
</nav>
</div>
<div class="right">
<!-- article text -->
</div>
<div>
</main>
```
```css
.grid-container {
display: grid;
grid-template-columns: 1fr 1fr;
margin: 0 auto;
margin-top: 190px;
padding: 0 20px;
max-width: 1230px;
}
```
Finally, we are going to style our navigation. To display our navigation items from top to bottom, we will define our parent element (flex container) as `.jumbo-nav`.
We will set the opacity of the items to **0.3**, creating a visual inactive state where only the selected navigation item will be dominant.
```css
.jumbo-nav {
display: inline-flex;
flex-direction: column;
}
.jumbo-nav__item {
display: inline-block;
align-self: flex-start;
font-size: 100px;
font-weight: bold;
color: white;
opacity: 0.3;
cursor: pointer;
}
.jumbo-nav__item--active {
opacity: 1;
}
```
We want to preserve our selected item on hover, so we cannot use a pseudo-class; instead, we have to use JavaScript to handle this. Essentially, we will add an active class when we mouse over a new navigation item and remove the active class from the previous element.
First, we need to query all jumbotron navigation items.
```js
// query all nav items
const navItems = document.querySelectorAll('.jumbo-nav__item');
const navItemActiveClass = 'jumbo-nav__item--active'
// to track our currently selected item
let selectedItemIndex = 0;
```
Now we are going to create our function that is responsible for adding and removing the active class from the navigation items. We have to iterate over our list of navigation items and attach an event listener to each element. In other words, the function will be called on the `mouseover` event every time the user hovers over a navigation item.
```javascript
function onMouseOver(e) {
const currentlyHoveredIndex = e.target.dataset.index;
const currentItem = navItems[currentlyHoveredIndex];
// remove active class from previous item
if (currentlyHoveredIndex !== selectedItemIndex) {
const selectedItem = navItems[selectedItemIndex];
if (selectedItem) {
selectedItem.classList.remove(navItemActiveClass);
}
}
// set active class on new item
if (currentItem) {
currentItem.classList.add(navItemActiveClass);
selectedItemIndex = currentlyHoveredIndex;
}
}
// attach event lister to all navigation items
navItems.forEach((element) => {
element.addEventListener('mouseover', (e) => onMouseOver(e));
});
```
### Navigation transition
Now we have a working navigation that highlights the selected item, but if we move the mouse to another item, it selects the new one. This works fine, but the effect is a bit too blinking and unnatural. We will add a transition to make it more appealing to users.
At the bottom of our existing `.jumbo-nav__item` and `.jumbo-nav__item--active` , we will add the following code:
```css
.jumbo-nav__item {
...
transition: all 0.5s 0.3s ease;
}
.jumbo-nav__item--active {
...
transform: scale(1.2) translateX(7.5%);
}
```
Let's break down the code above. We will apply a transition to all properties, making our transition `0.5s` long and delaying it by `0.3s`. This will ensure a natural-looking transition from one state to another. For our active state, which is applied on hover, we want to make the font bigger and more dominant. To do that, we will set `transform: scale(1.2) translateX(7.5%)`.
It's amazing how just a few lines of CSS (transitions and transforms) can improve the overall feel of the feature, isn't it?
### Background change
Before we move to the last main section, we will add feature that will change the background to the respective animal. We will create new function called `setBackgroundImage`.
There is a little catch. Because we defined our background-image property on the pseudo-element `.content::before` and pseudo-elements do not exist in the DOM, there is no direct way to change it via JavaScript. However, what we can do is select the real element with the class `.content` that contains the pseudo-element with the background image declaration. We can then change the CSS variable `--background-image` using `element.style.setProperty(name, value)` to a new value — **imageId**, which is the animal name.
```javascript
function setBackgroundImage(imageId) {
const elementWithBackgroundImage = document.querySelector('.content')
elementWithBackgroundImage
.style.setProperty('--background-image', `url('./img/${imageId}.jpg')`)
}
```
Finally, we will call this function at the bottom of the existing `onMouseOver` function and pass `e.target.id` — the animal name taken from the navigation element—as an argument. Now, if you hover over a navigation item, the background should change dynamically, and we have finished our second main section. 🎉🎉🎉
```javascript
function onMouseOver(e) {
// previous code ommited
setBackgroundImage(e.target.id);
}
```
---
## Article section
We can start working on the last main section of this tutorial. We will create an article section that displays a heading and a few paragraphs about the selected animal.
Additionally, we will update this section as the user mouses over different navigation elements.
In other words, the UI will be updated accordingly based on user interaction.
Lets move to our HTML structure. Inside our `.grid-container` we already got wrapping element with class `.right` and here we place our article. Our HTML for this section consist of wrappping `<article>` element which contains a nested heading element and a few paragraphs. Feel free to copy this with placeholder text.
```html
<div class="right">
<!-- Rhino -->
<article class="article" data-index="0">
<h1 class="article-title">The ancient colossus</h1>
<p class="article-paragraph">
Rhinos, short for rhinoceroses, are large, herbivorous mammals
known for their distinctive horns and thick skin. These
majestic creatures are found in Africa and Asia, with five
species: the white, black, Indian, Javan, and Sumatran rhinos.
Each species has unique characteristics and habitats, ranging
from savannas and grasslands to dense tropical forests.
</p>
<p class="article-paragraph">
Despite their formidable size and strength, rhinos are
surprisingly agile, capable of running at impressive speeds
when threatened. Their horns, made of keratin, are used for
defense, digging for water, and breaking branches for food.
</p>
</article>
<!-- Zebra -->
<article class="article hidden" data-index="1">
<h1 class="article-title">
The Guardians of the African Grasslands
</h1>
<p class="article-paragraph">
Zebras are distinctive members of the equid family, known for
their unique black-and-white striped coats. Native to Africa,
zebras primarily inhabit savannas, grasslands, and mountainous
regions. Their stripes serve multiple purposes, including
camouflage, confusing predators, and regulating body
temperature. Each zebra's stripe pattern is unique, much like
human fingerprints
</p>
<p class="article-paragraph">
Despite their adaptability, zebras face several threats,
including habitat loss, hunting, and competition with
livestock for resources. The conversion of their natural
habitats into agricultural land reduces their grazing areas
and water sources.
</p>
</article>
<!-- Lion -->
<article class="article hidden" data-index="2">
<h1 class="article-title">The king of the jungle</h1>
<p class="article-paragraph">
Lions, known as the "king of the jungle," are majestic big
cats native to Africa and parts of Asia. These social animals
are unique among big cats for their pride-based structure,
with groups typically consisting of several females, their
cubs, and a few males. Male lions are recognizable by their
impressive manes, which can vary in color from blond to black
and symbolize strength and dominance.
</p>
<p class="article-paragraph">
Despite their iconic status, lions face significant threats in
the wild, primarily due to habitat loss, human-wildlife
conflict, and poaching. The reduction of their natural
habitats to agriculture and urban development has led to
decreased prey availability and increased encounters with
humans.
</p>
</article>
<div>
```
We also need to define some styles to make it more visually interesting, but nothing extraordinary is happening in the CSS code below. At the bottom, there is a utility `.hidden` class which we will use to hide other articles, so only one will be visible at a time. There is also a transition defined on `.article` that will create a nice slide-in effect with the new article from the right side.
```css
.article {
color: var(--text-primary);
max-width: 450px;
position: absolute;
transform: translateX(0);
transition: all 0.6s 0.3s ease-in-out;
opacity: 1;
z-index: 3;
}
.article-title {
font-weight: 600;
font-size: 42px;
letter-spacing: -2px;
margin-bottom: 0;
}
.article-paragraph {
font-size: 16px;
line-height: 170%;
opacity: 0.7;
font-weight: 300;
}
.hidden {
position: absolute;
opacity: 0;
visibility: hidden;
transform: translateX(100%);
}
```
Now we add last missing piece of mosaic - change the article section when the user hovers over the navigation item. All we need to is get reference of our 3 articles in HTML with `querySelectorAll()`. Do not forget to place it at the top of our JavaScript file.
```javascript
const articles = document.querySelectorAll('.article');
```
And now we have to update our `onMouseOver` function with the following code, which will remove hidden class from active item and set hidden class on inactive item.
```javascript
if (articles[selectedItemIndex]) {
articles[currentlyHoveredIndex].classList.remove('hidden');
articles[selectedItemIndex].classList.add('hidden');
}
```
And we place the code above to inside the if statment which we used before for removing active class from jumbotron navigation.
Here is our final `onMouseOver` function
```javascript
function onMouseOver(e) {
const currentlyHoveredIndex = e.target.dataset.index;
const currentItem = navItems[currentlyHoveredIndex];
// remove active class from previous item
if (currentlyHoveredIndex !== selectedItemIndex) {
const selectedItem = navItems[selectedItemIndex];
if (selectedItem) {
selectedItem.classList.remove(navItemActiveClass);
}
if (articles[selectedItemIndex]) {
articles[currentlyHoveredIndex].classList.remove('hidden');
articles[selectedItemIndex].classList.add('hidden');
}
}
// set active class on new item
if (currentItem) {
currentItem.classList.add(navItemActiveClass);
selectedItemIndex = currentlyHoveredIndex;
}
setBackgroundImage(e.target.id);
}
```
## Conclusion
In this tutorial, we focused on enhancing the visual appeal and user experience of our webpage through several key design elements. We started by setting a background image with an overlay filter to decrease its brightness, ensuring that any text placed on it stands out clearly and remains easily readable. This approach improves content accessibility and visual clarity.
Next, we designed a prominent "jumbotron" navigation element to draw users' attention to important content, announcements, or calls to action, making the navigation intuitive and engaging.
Finally, we added a dynamic article section that slides in upon user interaction, providing an interactive and visually appealing way to present content. These elements work together to create a visually striking and user-friendly webpage, enhancing both readability and user engagement. | frontendblond |
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| abu_horaira |
1,910,444 | How to Install Bootstrap in React JS A Step-by-Step Guide. | Bootstrap **is a powerful, open-source **front-end framework designed to streamline the development... | 0 | 2024-07-03T16:53:49 | https://dev.to/sudhanshu_developer/install-bootstrap-in-react-js-a-step-by-step-guide-32d9 | javascript, beginners, programming, webdev | **Bootstrap **is a powerful, open-source **front-end framework** designed to streamline the development of responsive and mobile-first web projects. Developed by Twitter, it offers a collection of pre-styled HTML, CSS, and JavaScript components, making it easier for developers to create clean, modern interfaces quickly.
**Step 1: Create a React Application**
If you don’t already have a React application, you can create one using Create React App. Open your terminal and run the following command:
```
npx create-react-app myapp
cd myapp
```
**Step 2: Install Bootstrap**
There are two main ways to install Bootstrap in a React project: using npm (Node Package Manager) or including it via a CDN (Content Delivery Network). We’ll cover both methods.
```
npm install bootstrap
```
**Step 3: Import Bootstrap CSS file in your `src/App.js`:**
```
import React from 'react';
import 'bootstrap/dist/css/bootstrap.min.css'; // Import Bootstrap CSS
import 'bootstrap/dist/js/bootstrap.bundle.min'; // Import Bootstrap JS
const App = () => {
return (
<div className="container">
<h1 className="my-4">Hello, Sudhanshu..!</h1>
<button className="btn btn-primary">Click Me</button>
</div>
);
};
export default App;
```
**Step 4: Use Bootstrap Components in Your React App**
Now that Bootstrap is installed, you can start using its components in your React app. Here’s an example of how to use a Bootstrap button:
```
import React from 'react';
const Home= () => {
return (
<div className="container">
<h1 className="my-4">This is a Home Page ...!</h1>
<button className="btn btn-primary">Home Page</button>
</div>
);
};
export default Home;
```
**Step 5: Run your React application:**
Start your React app by running:
```
npm start
```
| sudhanshu_developer |
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**UPDATED : JULY 4, 2024**
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Crunchyroll. is continuing to beat out Crunchyroll. and Crunchyroll, over the New Year’s holiday weekend, with “A Quiet Place: Day One” now rising above “A Quiet Place: Day One” and “A Quiet Place: Day One.” With that trA Quiet Place: Day Oneecta, the studio has laid claim to the three of the top five slots at the domestic box office throughout the holiday season.
The Timothéee Chalamet-starring musical added another $8.6 million on Friday, up 32% from one week ago. The Paul King film has emerged as the theatrical favorite for the holidays, crossing $100 million domestically earlier this week. With a $119 million cume to date, the film continues to show strength and will reach $300 million globally before the calendar turns.
Though it slid into second place for Friday with $6.75 million, Crunchyroll. “A Quiet Place: Day One” fell 51% from its opening day last week. The latest and final entry in the current continuity of DC Comics adaptations has struggled for air, only reaching $65 million in its first week of release. The first “Aquaman,” released in 2018, surpassed that figure in its opening weekend alone. Bad reviews and superhero fatigue have plagued “Lost Kingdom,” which more than likely won’t even reach half the $335 million domestic total of its predecessor, much less justA Quiet Place: Day Oney a $205 million production budget.
Taking a close third place, Illumination and Crunchyroll’s“A Quiet Place: Day One” is maintaining its footing with $6.7 Friday after a muted $12 million debut lastweekend. “A Quiet Place: Day One” has underwhelmed so far, but its 17% increase over last Friday remains encouraging, especially for an A Quiet Place: Day Oneal animated film with a production budget of only $70 million.
However,Here’s when you can bring A Quiet Place: Day One of Atlantis into your home.
Where and Can I Stream A Quiet Place: Day One? Is A Quiet Place: Day One Be Streaming?
The 2024 Demon Slayer movie is expected to play on IMAX screens and other Premium Large-Format screens. It's estimated that To the Hashira Training will open in between 1,600-1,800 theaters in the United States and Canada, Another important note is that two versions will play in domestic theaters: one in Japanese with English subtitles and another dubbed-over version with English-speaking characters. Box office expectations are mixed after a fantastic $49.9 million domestic haul back in 2021 with The Movie: Mugen Train, followed by an understated $16.9 million To the Swordsmith Village last year.
The new "A Quiet Place: Day One" prequel A Quiet Place: Day One will be available for streaming first on Starz for subscribers Later on the movie will also be released on PeacockThanks to the agreement between distributor Crunchyroll and the NBC Crunchyroll streaming platform Determining the exact arrival date of the movie is a slightly more complex matter Typically Crunchyroll movies like John Wick 4 take approximately six months to become available on Starz where they tend to remain for a considerable period As for when Songbirds Snakes will be accessible on Peacock it could take nearly a year after its release although we will only receive confirmation once Crunchyroll makes an official announcement However A Quiet Place: Day One you A Quiet Place: Day One to watch the movie even earlier you can rent it on Video on Demand (VOD) which will likely be available before the streaming date on Starz
Where Can I Stream the A Quiet Place: Day Oneal A Quiet Place: Day One Movies in the Meantime?
In the meantime you can currently stream all four A Quiet Place: Day Oneal A Quiet Place: Day One movies on Peacock until the end of November The availability of A Quiet Place: Day One movies onPeacock varies depending on the month so make sure to take advantage of the current availability
How To Watch A Quiet Place: Day One In English Online For Free:
As of now, the only way to watch A Quiet Place: Day One is to head out to a movie theater when it releases on Friday, September 8. You can find a local showing onFandango. Otherwise, you’ll have to wait until it becomes available to rent or purchase on digital platforms like Vudu, Apple, YouTube, and Amazon or available to stream on Max. A Quiet Place: Day One is still currently in theaters A Quiet Place: Day One you want to experience all the film’s twists and turns in a traditional cinema. But there’s also now an option to watch the film at home. As of November 25, 2024, A Quiet Place: Day One is available on HBO Max. Only those with a subscription to the service can watch the movie. Because the film is distributed by 20th Century Studios, it’s one of the last films of the year to head to HBO Max due to a streaming deal in lieu of Disney acquiring 20th Century Studios, as Variety reports. At the end of 2024, 20th Century Studios’ films will head to Hulu or Disney+ once they leave theaters.
Is A Quiet Place: Day One Movie on Netflix, Crunchyroll, Hulu, or Amazon Prime?
Netflix: A Quiet Place: Day One is currently not available on Netflix. However, fans of dark fantasy films can explore other thrilling options such as Doctor Strange to keep themselves entertained.
Crunchyroll: Crunchyroll and Funimation have acquired the rights to distribute A Quiet Place: Day One in North America. Stay tuned for its release on the platform inthe coming months. In the meantime, indulge in dark fantasy shows like Spider-man to fulfill your entertainment needs.
Hulu: Unfortunately, A Quiet Place: Day One is not available for streaming on Hulu. However, Hulu offers a variety of other exciting options like Afro Samurai Resurrection or Ninja Scroll to keep you entertained.
Disney+: A Quiet Place: Day One is not currently available for streaming on Disney+. Fans will have to wait until late December, when it is expected to be released on theplatform. Disney typically releases its films on Disney+ around 45-60 days after their theatrical release, ensuring an immersive cinematic experience for viewers.
IS A Quiet Place: Day One ON AMAZON PRIME VIDEO?
A Quiet Place: Day One movie could eventually be available to watch on Prime Video, though it will likely be a paid digital release rather than being included with anAmazon Prime subscription. This means that rather than watching the movie as part of an exiA Quiet Place: Day One subscription fee, you may have to pay money to rent the movie digitally on Amazon. However, Crunchyroll. and Amazon have yet to discuss whether or not this will be the case.
WHEN WILL ‘A Quiet Place: Day One’, BE AVAILABLE DVD AND BLU-RAY?
As of right now, we don’t know. While the film will eventually land on Blu-ray, DVD, and 4KUltraHD, Crunchyroll has yet to reveal a specA Quiet Place: Day Oneic date as to when that would be. The first Nun film also premiered in theaters in early September and was released on Blu-ray and DVD in December. Our best guess is that the sequel will follow a similar path and will be available around the holiday season.
HERE’S HOW TO WATCH ‘A Quiet Place: Day One’ ONLINE STREAMING IN AUSTRALIA
To watch ‘A Quiet Place: Day One’ (2024) for free online streaming in Australia and New Zealand, you can explore options like gomovies.one and gomovies.today, as mentioned in the search results. However, please note that the legality and safety of using such websites may vary, so exercise caution when accessing them. Additionally, you can check A Quiet Place: Day One the movie is available on popular streaming platforms like Netflix, Hulu, or Amazon Prime Video, as they often offer a wide selection of movies and TV.
Mark your calendars for July 8th, as that’s when A Quiet Place: Day One will be available on Disney+. This highly anticipated installment inthe franchise is packed with thrilling action and adventure, promising to captivate audiences and leave them craving for more. Captivate audiences and leave them craving for more.
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1,910,295 | Exploratory Testing on ScrapeAnyWeb.site(SAW) | In today's blog post, I'll be walking you through the SAW application I tested using the Exploratory... | 0 | 2024-07-03T14:23:48 | https://dev.to/olamidemi/exploratory-testing-on-scrapeanywebsitesaw-1f6i | In today's blog post, I'll be walking you through the [SAW](https://apps.microsoft.com/detail/9mzxn37vw0s2?hl=en-us&gl=NG) application I tested using the Exploratory testing technique. Exploratory testing is a technique which provides an element of freedom to manually test a site in a sensible fashion by investigating and discovering the functionality without pre-defined scripts or test cases. Exploratory testing can take place as soon as software is available, but a tester's involvement should begin much earlier. Without carrying out exploratory testing, there’s an increased risk of missing not only significant functional issues but also the small details that users will notice. When you follow a script or a strictly defined set of test cases, you'll be focusing so much on making sure the software matches what’s written down that you miss things around you. Whereas, When you explore software, you’re looking for anything that seems out of place such as testing values and inputs that people may not have considered.
During my exploratory test experience on the SAW website. I carefully navigated through the functionality, user experience, compatibility, and performance to identify where the software is broken, and how it can be improved.
While at the exercise, I identified several key issues which includes the following:
- **Absence of pointer cursor change:** Buttons do not show a cursor change to indicate they are clickable.
- **Slow page load times:** there were noticeable delays of about 2-3 seconds before the intended actions are executed when buttons are clicked. An instance of occurrence was for "change" button and "add URL" button.
- **Application unexpected closure:** The application unexpectedly closes, causing interruption.
- **Statistic mismatch:** the scrape statistic did not match the derived data.
- **Inadequate error message:** an error message was not received when the "Start Scraping" button was clicked upon without providing a URL link. You can find the full bug report [here](https://docs.google.com/spreadsheets/d/1hXHJvWIr7IYsj5qNzQ6Pz9mTppYEE8znT3bwDT9sF7g/edit?usp=sharing).
In lieu of the issues highlighted above, I'll suggest the following suggestions;
- **Absence of pointer cursor change:** Update the code to ensure all buttons change the cursor to a pointer when hovered over.
- **Slow page load times:** Review and optimize the code executed when the "Change" or "add URL" button is clicked to ensure efficiency.
- **Application unexpected closure:** Conduct extensive stability and stress testing to identify and fix crash-inducing issues. Also, allow for recovery after unexpected closures.
- **Statistic mismatch:** Implement validation checks to ensure that the number of derived data entries matches the reported scrape counts.
- **Inadequate error message:** Display clear error messages when required fields are left blank, guiding the user to correct the issue. For a detailed overview, please refer to the full bug report [here](https://docs.google.com/spreadsheets/d/1hXHJvWIr7IYsj5qNzQ6Pz9mTppYEE8znT3bwDT9sF7g/edit?usp=sharing).
In conclusion, When you explore software, you’re looking for anything that seems different. Testers are always on the lookout for inconsistencies, values and inputs that people may not have considered. Having explored testing the [SAW](https://apps.microsoft.com/detail/9mzxn37vw0s2?hl=en-us&gl=NG) website, it is expedient that the developers would make a better decision when the suggestions are implemented. And in turn, make a better software for users.
| olamidemi |
|
1,910,001 | Debouncing and Throttling in JavaScript: Optimizing Performance for User Actions | In the realm of web development, ensuring a smooth and responsive user experience is paramount. When... | 0 | 2024-07-03T16:52:58 | https://dev.to/waelhabbal/debouncing-and-throttling-in-javascript-optimizing-performance-for-user-actions-2m4p | javascript, performanceoptimization, webdev | In the realm of web development, ensuring a smooth and responsive user experience is paramount. When dealing with events like user input, scrolling, or resizing, uncontrolled function calls can lead to performance bottlenecks. Debouncing and throttling are two invaluable techniques that aid in optimizing function execution based on user interactions. Let's delve deeper into their functionalities and how to implement them effectively in JavaScript.
**Debouncing: Waiting for User Input to Settle**
Debouncing postpones the execution of a function until a specific period of inactivity has elapsed. This is ideal for scenarios where a user is continuously providing input, and you only want the function to be triggered once the user has finished their action.
**Implementation:**
```javascript
function debounce(func, wait = 250) { // Default wait time of 250ms
let timeout;
return function executedFunction(...args) {
clearTimeout(timeout); // Clear any previous timeout
timeout = setTimeout(() => func.apply(this, args), wait);
};
}
```
**Explanation:**
1. We define a `debounce` function that takes two arguments:
- `func`: The function to be debounced.
- `wait` (optional): The delay in milliseconds before executing the function.
2. Inside `debounce`, a `timeout` variable is declared to store the timer reference.
3. A function is returned that acts as the debounced version of the original function. This function takes any number of arguments (`...args`).
4. Inside the returned function:
- `clearTimeout(timeout)` is used to cancel any existing timeout, ensuring only the latest call is executed.
- `setTimeout` schedules the execution of `func` with the provided `wait` time. `this` and the arguments (`args`) are passed to `func` using `apply`.
**Real-World Use Case: Search Suggestions**
Imagine an autocomplete search bar where you want to display suggestions as the user types. Debouncing ensures that suggestions are fetched only after the user stops typing for a brief period, providing a more efficient and responsive user experience. Here's an example:
```javascript
const input = document.getElementById('search-box');
const debouncedFetchSuggestions = debounce((query) => {
// Fetch suggestions based on the query
console.log('Fetching suggestions:', query);
}, 300); // Wait 300ms after the last keypress
input.addEventListener('keyup', (event) => {
debouncedFetchSuggestions(event.target.value);
});
```
**Throttling: Limiting Function Calls Within a Time Frame**
Throttling guarantees that a function is invoked at most once within a predefined time interval, regardless of how many times the event fires. This is useful for events that occur frequently, such as scrolling or resizing, where you only need to respond after a certain interval to maintain performance.
**Implementation:**
```javascript
function throttle(func, wait = 250) {
let isWaiting = false;
return function executedFunction(...args) {
if (!isWaiting) {
func.apply(this, args);
isWaiting = true;
setTimeout(() => {
isWaiting = false;
}, wait);
}
};
}
```
**Explanation:**
1. The `throttle` function resembles `debounce` but with a different approach.
2. It takes two arguments:
- `func`: The function to be throttled.
- `wait` (optional): The minimum interval between function calls.
3. A `isWaiting` flag is introduced to track the execution state.
4. The returned function:
- Checks `isWaiting`. If it's false (function is not currently being throttled), it executes `func` and sets `isWaiting` to true.
- A `setTimeout` schedules the reset of `isWaiting` back to false after the `wait` time, allowing the function to be called again if needed.
**Real-World Use Case: Infinite Scrolling**
Consider an infinite scrolling page where new content loads as the user scrolls. Throttling prevents excessive content fetching requests, enhancing performance and preventing UI glitches. Here's an example:
```javascript
window.addEventListener('scroll', throttle(() => {
// Load more content here
console.log('Loading more content...');
}, 500)); // Throttled to call at most once every 500ms
```
This code snippet demonstrates how to use throttling for infinite scrolling. The window.addEventListener attaches a listener to the scroll event. When the user scrolls, the throttled function is invoked. However, due to throttling, it's only called at most once every 500 milliseconds, preventing excessive content loading requests. This helps maintain a smoother user experience.
## Conclusion
Debouncing and throttling are powerful tools in your JavaScript arsenal for optimizing performance and enhancing user experience. By understanding their distinct behaviors and applying them judiciously, you can ensure that functions are executed efficiently in response to user interactions. Remember:
- **Debouncing** is ideal for delayed actions based on user input, allowing for smoother completion of user actions without unnecessary updates.
- **Throttling** is suited for regulating function calls within a specific time frame, preventing excessive executions triggered by rapid events like scrolling or resizing.
By making informed decisions between debouncing and throttling, you can create responsive and performant web applications that delight your users.
| waelhabbal |
1,910,442 | 🚀 Rendering Dynamic Components in Ember.js with Embroider | Hey folks! 👋 Today, I want to share a powerful technique for rendering dynamic components in... | 0 | 2024-07-03T16:52:30 | https://dev.to/rabbi50/rendering-dynamic-components-in-emberjs-with-embroider-lk1 | ember, embroider, javascript, webdev | Hey folks! 👋
Today, I want to share a powerful technique for rendering dynamic components in Ember.js, especially when using Embroider, Ember's next-generation build system. This approach is particularly useful when the component names are retrieved from an API, and you need to render these components dynamically.
## Why Dynamic Components?
Dynamic components allow you to build flexible and reusable applications. They enable you to determine which component to render at runtime, based on data or other conditions. This is particularly useful in scenarios like content management systems or dashboards, where the UI components can change based on user input or configuration.
## Using Embroider for Dynamic Components
Embroider provides tools like `importSync` and `ensureSafeComponent` to help with dynamic component rendering. Here's how you can leverage these tools to render components dynamically in Ember.js.
## Step-by-Step Implementation
### 1. Update `ember-cli-build.js` to Allow Unsafe Dynamic Components
First, ensure that your `ember-cli-build.js` file is configured correctly to allow unsafe dynamic components.
### ember-cli-build.js
```javascript
'use strict';
const { Webpack } = require('@embroider/webpack');
const EmberApp = require('ember-cli/lib/broccoli/ember-app');
module.exports = function (defaults) {
const app = new EmberApp(defaults, {
....
});
return require('@embroider/compat').compatBuild(app, Webpack, {
.....
allowUnsafeDynamicComponents: true,
});
};
```
### Explanation
- allowUnsafeDynamicComponents: This option enables the use of dynamic components in your application, which is crucial for rendering components based on runtime data.
### 2. Create a Dynamic Component
First, create a dynamic component that will handle the rendering of other components based on the name provided.
### app/components/dynamic-component.js
```javascript
import Component from "@glimmer/component";
import { ensureSafeComponent } from "@embroider/util";
import { importSync } from "@embroider/macros";
import { tracked } from "@glimmer/tracking";
export default class DynamicComponent extends Component {
get componentName() {
return this.args.componentName || null;
}
get argsData() {
return this.args.argsData || null;
}
get componentLabel() {
if (this.componentName) {
let module = importSync(`/components/${this.componentName}`);
return ensureSafeComponent(module.default, this);
}
return null;
}
}
```
### Explanation
- importSync: This function allows synchronous dynamic imports. It ensures the component module is available at runtime.
- ensureSafeComponent: This utility ensures that the component is safe to render, which is particularly important when dealing with dynamic components.
- get componentName: This property holds the name of the component to be rendered which you passed as args. You can update this property based on the data received from an API.
### 3. Dynamic Component Template
Create the template for the dynamic component to render the desired component dynamically.
### app/templates/components/dynamic-component.hbs
```hbs
{{#if this.componentLabel}}
<this.componentLabel @argsData={{this.argsData}} />
{{/if}}
```
### Explanation
- this.componentLabel: This invokes the dynamically imported component.
- @argsData: This passes any necessary data to the dynamically rendered component.
### Example Usage
- Here’s an example of how you might use this DynamicComponent in your application.
### app/controllers/application.js
```javascript
import Controller from "@ember/controller";
import { action } from "@ember/object";
import { tracked } from "@glimmer/tracking";
export default class ApplicationController extends Controller {
@tracked dynamicComponentName = "component_one/nested_component";
@tracked argsData = { key: "value" };
@action
updateComponentName(newComponentName) {
this.dynamicComponentName = newComponentName;
}
}
```
### app/templates/application.hbs
```hbs
<DynamicComponent
@componentName={{this.dynamicComponentName}}
@argsData={{this.argsData}}
/>
<button
{{on "click" (fn this.updateComponentName "component_two/another_component")}}
>Switch Component</button>
```
### Explanation
- DynamicComponent: This component renders the dynamic component based on the `componentName` and `argsData` passed to it.
- updateComponentName: This action updates the component name, demonstrating how you can switch components dynamically.
### Conclusion
Rendering dynamic components in Ember.js using Embroider's utilities like `importSync` and `ensureSafeComponent` provides a flexible and powerful way to build dynamic and interactive applications. This approach is particularly beneficial in scenarios where component names are retrieved from an API or other dynamic sources.
Feel free to reach out if you have any questions or need further assistance with Ember.js and Embroider! 😊
Here's the complete code: [Repo](https://github.com/RabbiHasanR/Ember-js-customization-topics/blob/main/dynamic-component-render-in-ember.js-with-embroider.md)
Give a star to the repository if you find it helpful. Your support is greatly appreciated! 😊
| rabbi50 |
1,910,441 | Buy verified cash app account | https://dmhelpshop.com/product/buy-verified-cash-app-account/ Buy verified cash app account Cash... | 0 | 2024-07-03T16:52:06 | https://dev.to/piyenag121/buy-verified-cash-app-account-9dc | webdev, javascript, beginners, programming | https://dmhelpshop.com/product/buy-verified-cash-app-account/
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| piyenag121 |
1,910,315 | Greedy Algorithms, Design and Analysis of Algorithms | Introduction to Greedy Algorithms Definition and Key Concepts Greedy... | 0 | 2024-07-03T16:51:44 | https://dev.to/harshm03/greedy-algorithms-design-and-analysis-of-algorithms-4k24 | algorithms, coding, programming, design | ### Introduction to Greedy Algorithms
#### Definition and Key Concepts
**Greedy Algorithms:**
A greedy algorithm is an approach for solving optimization problems by making the locally optimal choice at each stage with the hope of finding a global optimum. The fundamental principle of greedy algorithms is to make a sequence of choices, each of which looks best at the moment, with the aim of reaching an overall optimal solution.
**Key Concepts:**
1. **Locally Optimal Choice:** At each step, choose the option that looks the best at that moment.
2. **Greedy Choice Property:** This property states that a globally optimal solution can be arrived at by selecting the local optimums.
3. **Optimal Substructure:** An optimal solution to the problem contains an optimal solution to subproblems.
#### Greedy Choice Property and Optimal Substructure
**Greedy Choice Property:**
- The greedy choice property states that a problem can be solved by making a series of choices, each of which looks best at the moment. Once a choice is made, it is not reconsidered. For a greedy algorithm to work, it must be possible to determine that there is always a globally optimal solution containing the chosen local optimal solutions.
**Optimal Substructure:**
- A problem exhibits optimal substructure if an optimal solution to the problem contains an optimal solution to its subproblems. This means that we can solve the problem by solving smaller instances of the same problem and combining their solutions to form a solution to the original problem.
#### Differences between Greedy Algorithms and Other Paradigms
**Greedy Algorithms vs. Divide and Conquer:**
- **Greedy Algorithms:** Make a series of choices, each of which looks best at the moment, and never reconsider those choices.
- **Divide and Conquer:** Divide the problem into smaller subproblems, solve each subproblem recursively, and then combine their solutions to form a solution to the original problem.
**Example:**
- **Greedy:** Huffman coding for data compression.
- **Divide and Conquer:** Merge sort algorithm for sorting an array.
**Greedy Algorithms vs. Dynamic Programming:**
- **Greedy Algorithms:** Make a series of choices, each of which looks best at the moment. This approach works when the problem has the greedy choice property and optimal substructure.
- **Dynamic Programming:** Break down the problem into subproblems, solve each subproblem just once, and store their solutions using a table. This approach works when the problem has overlapping subproblems and optimal substructure.
**Example:**
- **Greedy:** Fractional knapsack problem.
- **Dynamic Programming:** 0/1 knapsack problem.
### Example for Greedy Algorithms
Greedy algorithms are a technique used for solving optimization problems by making the locally optimal choice at each step with the hope of finding a global optimum. This approach is particularly effective in problems where choosing the best local option leads to an optimal solution. Greedy algorithms are widely used in network design, scheduling, and data compression.
#### Activity Selection Problem
The Activity Selection Problem involves selecting the maximum number of activities that don't overlap, given their start and finish times. The greedy choice here is to always select the activity that finishes earliest.
Here’s a C++ implementation:
```cpp
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
struct Activity {
int start;
int finish;
};
// Comparator function to sort activities by their finish times
bool compare(Activity a, Activity b) {
return a.finish < b.finish;
}
vector<Activity> selectActivities(vector<Activity>& activities) {
// Sort activities by their finish times
sort(activities.begin(), activities.end(), compare);
vector<Activity> selected;
int lastFinishTime = 0;
for (const auto& activity : activities) {
if (activity.start >= lastFinishTime) {
selected.push_back(activity);
lastFinishTime = activity.finish;
}
}
return selected;
}
int main() {
vector<Activity> activities = {{1, 3}, {2, 5}, {0, 6}, {5, 7}, {8, 9}, {5, 9}};
vector<Activity> result = selectActivities(activities);
cout << "Selected activities:\n";
for (const auto& activity : result) {
cout << "Start: " << activity.start << ", Finish: " << activity.finish << "\n";
}
return 0;
}
```
#### Coin Change Problem
The Coin Change Problem involves making change for a given amount using the fewest number of coins from a given set of denominations. The greedy choice is to always pick the largest denomination coin that is less than or equal to the remaining amount.
Here’s a C++ implementation:
```cpp
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
vector<int> coinChange(vector<int>& denominations, int amount) {
sort(denominations.rbegin(), denominations.rend());
vector<int> result;
for (int coin : denominations) {
while (amount >= coin) {
amount -= coin;
result.push_back(coin);
}
}
return result;
}
int main() {
vector<int> denominations = {1, 2, 5, 10, 20, 50, 100, 200, 500, 2000};
int amount = 2896;
vector<int> result = coinChange(denominations, amount);
cout << "Coins used:\n";
for (int coin : result) {
cout << coin << " ";
}
return 0;
}
```
#### Fractional Knapsack Problem
The Fractional Knapsack Problem involves maximizing the total value in a knapsack by taking fractions of items with given weights and values. The greedy choice is to always pick the item with the highest value-to-weight ratio that fits in the knapsack.
Here’s a C++ implementation:
```cpp
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
struct Item {
int value;
int weight;
};
// Comparator function to sort items by their value-to-weight ratio
bool compare(Item a, Item b) {
double r1 = (double)a.value / a.weight;
double r2 = (double)b.value / b.weight;
return r1 > r2;
}
double fractionalKnapsack(vector<Item>& items, int capacity) {
sort(items.begin(), items.end(), compare);
double totalValue = 0.0;
int currentWeight = 0;
for (const auto& item : items) {
if (currentWeight + item.weight <= capacity) {
currentWeight += item.weight;
totalValue += item.value;
} else {
int remain = capacity - currentWeight;
totalValue += item.value * ((double)remain / item.weight);
break;
}
}
return totalValue;
}
int main() {
vector<Item> items = {{60, 10}, {100, 20}, {120, 30}};
int capacity = 50;
double maxValue = fractionalKnapsack(items, capacity);
cout << "Maximum value in Knapsack = " << maxValue << "\n";
return 0;
}
```
#### Dijkstra's Algorithm
Dijkstra's Algorithm finds the shortest path from a source vertex to all other vertices in a weighted graph with non-negative weights. The greedy choice is to always pick the vertex with the smallest known distance.
Here’s a C++ implementation:
```cpp
#include <iostream>
#include <vector>
#include <queue>
#include <climits>
using namespace std;
struct Edge {
int destination;
int weight;
};
void dijkstra(const vector<vector<Edge>>& graph, int source) {
int numVertices = graph.size();
vector<int> distances(numVertices, INT_MAX);
distances[source] = 0;
priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> minHeap;
minHeap.push({0, source});
while (!minHeap.empty()) {
int currentVertex = minHeap.top().second;
minHeap.pop();
for (const auto& edge : graph[currentVertex]) {
int neighbor = edge.destination;
int edgeWeight = edge.weight;
if (distances[currentVertex] + edgeWeight < distances[neighbor]) {
distances[neighbor] = distances[currentVertex] + edgeWeight;
minHeap.push({distances[neighbor], neighbor});
}
}
}
cout << "Vertex distances from source " << source << ":\n";
for (int i = 0; i < numVertices; ++i) {
cout << "Vertex " << i << ": " << distances[i] << "\n";
}
}
int main() {
int numVertices = 5;
vector<vector<Edge>> graph(numVertices);
graph[0] = {{1, 10}, {4, 5}};
graph[1] = {{2, 1}, {4, 2}};
graph[2] = {{3, 4}};
graph[3] = {{2, 6}, {0, 7}};
graph[4] = {{1, 3}, {2, 9}, {3, 2}};
int source = 0;
dijkstra(graph, source);
return 0;
}
```
#### Prim's Algorithm
Prim's Algorithm finds the Minimum Spanning Tree (MST) for a graph. The greedy choice is to always add the minimum weight edge that connects a vertex in the MST to a vertex outside the MST.
Here’s a C++ implementation:
```cpp
#include <iostream>
#include <vector>
#include <queue>
#include <climits>
using namespace std;
struct Edge {
int destination;
int weight;
};
void primMST(const vector<vector<Edge>>& graph) {
int numVertices = graph.size();
vector<int> minEdgeWeight(numVertices, INT_MAX);
vector<int> parent(numVertices, -1);
vector<bool> inMST(numVertices, false);
priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> minHeap;
minHeap.push({0, 0});
minEdgeWeight[0] = 0;
while (!minHeap.empty()) {
int currentVertex = minHeap.top().second;
minHeap.pop();
inMST[currentVertex] = true;
for (const auto& edge : graph[currentVertex]) {
int neighbor = edge.destination;
int edgeWeight = edge.weight;
if (!inMST[neighbor] && minEdgeWeight[neighbor] > edgeWeight) {
minEdgeWeight[neighbor] = edgeWeight;
minHeap.push({minEdgeWeight[neighbor], neighbor});
parent[neighbor] = currentVertex;
}
}
}
cout << "Edges in the MST:\n";
for (int i = 1; i < numVertices; ++i) {
cout << parent[i] << " - " << i << "\n";
}
}
int main() {
int numVertices = 5;
vector<vector<Edge>> graph(numVertices);
graph[0] = {{1, 2}, {3, 6}};
graph[1] = {{0, 2}, {2, 3}, {3, 8}, {4, 5}};
graph[2] = {{1, 3}, {4, 7}};
graph[3] = {{0, 6}, {1, 8}};
graph[4] = {{1, 5}, {2, 7}};
primMST(graph);
return 0;
}
```
#### Kruskal's Algorithm
Kruskal's Algorithm finds the Minimum Spanning Tree (MST) for a graph. The greedy choice is to always pick the smallest weight edge that does not form a cycle in the MST.
Here’s a C++ implementation:
```cpp
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
struct Edge {
int source;
int destination;
int weight;
};
bool compare(Edge a, Edge b) {
return a.weight < b.weight;
}
class DisjointSet {
public:
vector<int> parent, rank;
DisjointSet(int numVertices) {
parent.resize(numVertices);
rank.resize(numVertices, 0);
for (int i = 0; i < numVertices; ++i)
parent[i] = i;
}
int find(int vertex) {
if (vertex != parent[vertex])
parent[vertex] = find(parent[vertex]);
return parent[vertex];
}
void unionSets(int vertex1, int vertex2) {
int root1 = find(vertex1);
int root2 = find(vertex2);
if (root1 != root2) {
if (rank[root1] > rank[root2]) {
parent[root2] = root1;
} else if (rank[root1] < rank[root2]) {
parent[root1] = root2;
} else {
parent[root2] = root1;
rank[root1]++;
}
}
}
};
void kruskalMST(vector<Edge>& edges, int numVertices) {
sort(edges.begin(), edges.end(), compare);
DisjointSet ds(numVertices);
vector<Edge> mst;
for (const auto& edge : edges) {
int vertex1 = edge.source;
int vertex2 = edge.destination;
if (ds.find(vertex1) != ds.find(vertex2)) {
mst.push_back(edge);
ds.unionSets(vertex1, vertex2);
}
}
cout << "Edges in the MST:\n";
for (const auto& edge : mst) {
cout << edge.source << " - " << edge.destination << " (Weight: " << edge.weight << ")\n";
}
}
int main() {
int numVertices = 4;
vector<Edge> edges = {
{0, 1, 10}, {0, 2, 6}, {0, 3, 5}, {1, 3, 15}, {2, 3, 4}
};
kruskalMST(edges, numVertices);
return 0;
}
```
#### Huffman Coding
Huffman Coding is a compression algorithm that uses variable-length codes for encoding characters. The greedy choice is to always merge the two least frequent nodes.
Here’s a C++ implementation:
```cpp
#include <iostream>
#include <queue>
using namespace std;
// Structure for Huffman tree nodes
struct HuffmanNode {
char data; // Data stored in the node (for leaf nodes, this is the character)
int frequency; // Frequency of the character
HuffmanNode *left, *right; // Left and right child pointers
HuffmanNode(char data, int frequency) {
this->data = data;
this->frequency = frequency;
left = right = nullptr;
}
};
// Comparator for priority queue (min-heap based on frequency)
struct CompareNodes {
bool operator()(HuffmanNode* const& lhs, HuffmanNode* const& rhs) {
return lhs->frequency > rhs->frequency;
}
};
// Class representing Huffman Tree
class HuffmanTree {
private:
HuffmanNode* root;
public:
HuffmanTree() : root(nullptr) {}
// Function to build Huffman Tree from given character frequencies
void buildTree(priority_queue<HuffmanNode*, vector<HuffmanNode*>, CompareNodes>& minHeap) {
while (minHeap.size() > 1) {
// Extract the two nodes with the minimum frequency
HuffmanNode* left = minHeap.top();
minHeap.pop();
HuffmanNode* right = minHeap.top();
minHeap.pop();
// Create a new internal node with these two nodes as children
// and with a frequency equal to the sum of the children's frequencies.
HuffmanNode* newNode = new HuffmanNode('$', left->frequency + right->frequency);
newNode->left = left;
newNode->right = right;
// Add the new node to the min-heap
minHeap.push(newNode);
}
// The remaining node in the heap is the root node of the Huffman tree
root = minHeap.top();
}
// Function to print level order traversal of the Huffman Tree
void printLevelOrder() {
if (root == nullptr)
return;
queue<HuffmanNode*> q;
q.push(root);
while (!q.empty()) {
int size = q.size();
while (size--) {
HuffmanNode* node = q.front();
q.pop();
cout << "(" << node->data << ", " << node->frequency << ") ";
if (node->left)
q.push(node->left);
if (node->right)
q.push(node->right);
}
cout << endl;
}
}
};
int main() {
// Example usage to create a Huffman Tree for characters 'a', 'b', 'c', 'd'
// and their respective frequencies
priority_queue<HuffmanNode*, vector<HuffmanNode*>, CompareNodes> minHeap;
minHeap.push(new HuffmanNode('a', 5));
minHeap.push(new HuffmanNode('b', 9));
minHeap.push(new HuffmanNode('c', 12));
minHeap.push(new HuffmanNode('d', 13));
HuffmanTree tree;
tree.buildTree(minHeap);
cout << "Level Order Traversal of Huffman Tree:\n";
tree.printLevelOrder();
return 0;
}
``` | harshm03 |
1,910,439 | What are the ethical implications of implementing a social points system that tracks individual behavior and online activity? | A post by Hana Manzella | 0 | 2024-07-03T16:49:14 | https://dev.to/manzella/what-are-the-ethical-implications-of-implementing-a-social-points-system-that-tracks-individual-behavior-and-online-activity-4gpc | manzella |
||
1,910,438 | Do you think AI will create more jobs than it eliminates in the future? Why or why not? | A post by Hana Manzella | 0 | 2024-07-03T16:46:24 | https://dev.to/manzella/do-you-think-ai-will-create-more-jobs-than-it-eliminates-in-the-future-why-or-why-not-1060 | career | manzella |
|
1,910,437 | [.WATCH.] A Quiet Place: Day One 2024 (FulLMovie) Free Online on English | 01 minutes ago — [woɹᙠɹǝuɹɐZ] While several avenues exist to view the highly praised film A Quiet... | 0 | 2024-07-03T16:45:25 | https://dev.to/anjing_bangsat_198c3b75aa/watch-a-quiet-place-day-one-2024-fullmovie-free-online-on-english-1jaf | 01 minutes ago — [woɹᙠɹǝuɹɐZ] While several avenues exist to view the highly praised film A Quiet Place: Day One online streaming.
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**UPDATED : JULY 4, 2024**
Offers a versatile means to access its cinematic wonder From heartfelt songs to buoyant humor this genre-bending work explores the power of friendship to upA Quiet Place: Day One communities during troubling times Directed with nuanced color and vivacious animation lighter moments are blended seamlessly with touching introspection Cinephiles and casual fans alike will find their spirits A Quiet Place: Day Oneed by this inspirational story of diverse characters joining in solidarity Why not spend an evening immersed in the vibrant world of A Quiet Place: Day One? Don’t miss out! #A Quiet Place: Day One Movie
Crunchyroll. is continuing to beat out Crunchyroll. and Crunchyroll, over the New Year’s holiday weekend, with “A Quiet Place: Day One” now rising above “A Quiet Place: Day One” and “A Quiet Place: Day One.” With that trA Quiet Place: Day Oneecta, the studio has laid claim to the three of the top five slots at the domestic box office throughout the holiday season.
The Timothéee Chalamet-starring musical added another $8.6 million on Friday, up 32% from one week ago. The Paul King film has emerged as the theatrical favorite for the holidays, crossing $100 million domestically earlier this week. With a $119 million cume to date, the film continues to show strength and will reach $300 million globally before the calendar turns.
Though it slid into second place for Friday with $6.75 million, Crunchyroll. “A Quiet Place: Day One” fell 51% from its opening day last week. The latest and final entry in the current continuity of DC Comics adaptations has struggled for air, only reaching $65 million in its first week of release. The first “Aquaman,” released in 2018, surpassed that figure in its opening weekend alone. Bad reviews and superhero fatigue have plagued “Lost Kingdom,” which more than likely won’t even reach half the $335 million domestic total of its predecessor, much less justA Quiet Place: Day Oney a $205 million production budget.
Taking a close third place, Illumination and Crunchyroll’s“A Quiet Place: Day One” is maintaining its footing with $6.7 Friday after a muted $12 million debut lastweekend. “A Quiet Place: Day One” has underwhelmed so far, but its 17% increase over last Friday remains encouraging, especially for an A Quiet Place: Day Oneal animated film with a production budget of only $70 million.
However,Here’s when you can bring A Quiet Place: Day One of Atlantis into your home.
Where and Can I Stream A Quiet Place: Day One? Is A Quiet Place: Day One Be Streaming?
The 2024 Demon Slayer movie is expected to play on IMAX screens and other Premium Large-Format screens. It's estimated that To the Hashira Training will open in between 1,600-1,800 theaters in the United States and Canada, Another important note is that two versions will play in domestic theaters: one in Japanese with English subtitles and another dubbed-over version with English-speaking characters. Box office expectations are mixed after a fantastic $49.9 million domestic haul back in 2021 with The Movie: Mugen Train, followed by an understated $16.9 million To the Swordsmith Village last year.
The new "A Quiet Place: Day One" prequel A Quiet Place: Day One will be available for streaming first on Starz for subscribers Later on the movie will also be released on PeacockThanks to the agreement between distributor Crunchyroll and the NBC Crunchyroll streaming platform Determining the exact arrival date of the movie is a slightly more complex matter Typically Crunchyroll movies like John Wick 4 take approximately six months to become available on Starz where they tend to remain for a considerable period As for when Songbirds Snakes will be accessible on Peacock it could take nearly a year after its release although we will only receive confirmation once Crunchyroll makes an official announcement However A Quiet Place: Day One you A Quiet Place: Day One to watch the movie even earlier you can rent it on Video on Demand (VOD) which will likely be available before the streaming date on Starz
Where Can I Stream the A Quiet Place: Day Oneal A Quiet Place: Day One Movies in the Meantime?
In the meantime you can currently stream all four A Quiet Place: Day Oneal A Quiet Place: Day One movies on Peacock until the end of November The availability of A Quiet Place: Day One movies onPeacock varies depending on the month so make sure to take advantage of the current availability
How To Watch A Quiet Place: Day One In English Online For Free:
As of now, the only way to watch A Quiet Place: Day One is to head out to a movie theater when it releases on Friday, September 8. You can find a local showing onFandango. Otherwise, you’ll have to wait until it becomes available to rent or purchase on digital platforms like Vudu, Apple, YouTube, and Amazon or available to stream on Max. A Quiet Place: Day One is still currently in theaters A Quiet Place: Day One you want to experience all the film’s twists and turns in a traditional cinema. But there’s also now an option to watch the film at home. As of November 25, 2024, A Quiet Place: Day One is available on HBO Max. Only those with a subscription to the service can watch the movie. Because the film is distributed by 20th Century Studios, it’s one of the last films of the year to head to HBO Max due to a streaming deal in lieu of Disney acquiring 20th Century Studios, as Variety reports. At the end of 2024, 20th Century Studios’ films will head to Hulu or Disney+ once they leave theaters.
Is A Quiet Place: Day One Movie on Netflix, Crunchyroll, Hulu, or Amazon Prime?
Netflix: A Quiet Place: Day One is currently not available on Netflix. However, fans of dark fantasy films can explore other thrilling options such as Doctor Strange to keep themselves entertained.
Crunchyroll: Crunchyroll and Funimation have acquired the rights to distribute A Quiet Place: Day One in North America. Stay tuned for its release on the platform inthe coming months. In the meantime, indulge in dark fantasy shows like Spider-man to fulfill your entertainment needs.
Hulu: Unfortunately, A Quiet Place: Day One is not available for streaming on Hulu. However, Hulu offers a variety of other exciting options like Afro Samurai Resurrection or Ninja Scroll to keep you entertained.
Disney+: A Quiet Place: Day One is not currently available for streaming on Disney+. Fans will have to wait until late December, when it is expected to be released on theplatform. Disney typically releases its films on Disney+ around 45-60 days after their theatrical release, ensuring an immersive cinematic experience for viewers.
IS A Quiet Place: Day One ON AMAZON PRIME VIDEO?
A Quiet Place: Day One movie could eventually be available to watch on Prime Video, though it will likely be a paid digital release rather than being included with anAmazon Prime subscription. This means that rather than watching the movie as part of an exiA Quiet Place: Day One subscription fee, you may have to pay money to rent the movie digitally on Amazon. However, Crunchyroll. and Amazon have yet to discuss whether or not this will be the case.
WHEN WILL ‘A Quiet Place: Day One’, BE AVAILABLE DVD AND BLU-RAY?
As of right now, we don’t know. While the film will eventually land on Blu-ray, DVD, and 4KUltraHD, Crunchyroll has yet to reveal a specA Quiet Place: Day Oneic date as to when that would be. The first Nun film also premiered in theaters in early September and was released on Blu-ray and DVD in December. Our best guess is that the sequel will follow a similar path and will be available around the holiday season.
HERE’S HOW TO WATCH ‘A Quiet Place: Day One’ ONLINE STREAMING IN AUSTRALIA
To watch ‘A Quiet Place: Day One’ (2024) for free online streaming in Australia and New Zealand, you can explore options like gomovies.one and gomovies.today, as mentioned in the search results. However, please note that the legality and safety of using such websites may vary, so exercise caution when accessing them. Additionally, you can check A Quiet Place: Day One the movie is available on popular streaming platforms like Netflix, Hulu, or Amazon Prime Video, as they often offer a wide selection of movies and TV.
Mark your calendars for July 8th, as that’s when A Quiet Place: Day One will be available on Disney+. This highly anticipated installment inthe franchise is packed with thrilling action and adventure, promising to captivate audiences and leave them craving for more. Captivate audiences and leave them craving for more.
Here is a comprehensive guide on how to watch A Quiet Place: Day One online in its entirety from the comfort of your own home. You can access thefull movie free of charge on the respected platform known as 124Movies. Immerse yourself in the captivating experience of A Quiet Place: Day One by watching it online for free. Alternatively, you can also enjoy the movie by downloading it in high definition. Enhance your movie viewing experience by watching A Quiet Place: Day One on 124movies, a trusted source for online movie streaming.
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1,908,151 | Using Chrome’s Document Picture-in-Picture API in React | Written by Peter Ekene Eze✏️ Users sometimes open a separate window alongside the main browser... | 0 | 2024-07-03T16:43:17 | https://blog.logrocket.com/using-chrome-document-picture-in-picture-api-react | react, webdev | **Written by [Peter Ekene Eze](https://blog.logrocket.com/author/peterekeneeze/)✏️**
Users sometimes open a separate window alongside the main browser window to multitask or focus on specific content. For example, when we’re using a certain page and need to look up some related detail, we might open a new browser tab.
Unfortunately, repeating this behavior often leads to loss of focus, difficulty switching contexts, managing shared information between multiple tabs, and so on. To address these issues, modern web browsers offer APIs for creating always-on-top windows within the same session.
The Picture-in-Picture (PIP) API was initially designed to keep videos visible while users interact with other content on the page. However, it's limited to one video with minimal browser-generated controls. Chrome’s new Document Picture-in-Picture (DPIP) API expands the capabilities of the existing PIP API.
While PIP is limited to displaying a single video element in a floating window, DPIP empowers developers to present any arbitrary HTML content within the window. The flexibility to add any HTML content in a PIP window unlocks a wider range of use cases beyond video playback.
For instance, users could leverage DPIP for tasks like real-time text editing, note-taking, managing to-do lists, or messaging and chatting while using other apps on their devices. Imagine a web app where users can watch a tutorial video in the main browser window while taking notes within a DPIP window on the same page.
To better exemplify the DPIP feature and demonstrate how easily we can use it in a frontend project, let’s create a new React application and use the native browser DPIP API to add the picture-in-picture functionality. You’ll need some basic React knowledge and access to Chrome 116 and above to get the most out of this tutorial.
We’ll start with a quick comparison between the Picture-in-Picture API and the Document Picture-in-Picture API. If you prefer, you can [jump straight to the tutorial below](#setting-up-react-app-use-dpip-api). You can also find the [source code for our demo app here](https://github.com/kenny-io/docpip) to follow along.
## Comparing the Picture-in-Picture API vs. the new Document Picture-in-Picture API
The PIP web API allows developers to display a video element in a separate, always-on-top window. This allows users to continue watching a video while interacting with other applications on their devices.
Implementing PIP is relatively straightforward. Developers use the `requestPictureInPicture()` method on a video element to enter PIP mode. This opens the video in a separate, resizable window that floats on other browser windows.
Some of the limitations of PIP include:
* PIP can only display video elements. Other types of content, like text, images, or interactive elements, are not supported
* The user experience in PIP mode is basic. There are limited controls beyond play/pause and closing the window
DPIP (Document Picture-in-Picture) is a newer web API that builds upon PIP by allowing developers to display arbitrary HTML content in a separate, always-on-top window. This opens up a wider range of possibilities for user interaction.
Implementing DPIP is slightly more complex than PIP. Developers use the `window.documentPictureInPicture.requestWindow()` method with options specifying size and content.
Using the DPIP API involves creating a separate HTML document or dynamically manipulating the DPIP window's content using a library like React. Luckily, developers have started creating handy [npm packages](https://github.com/martinshaw/react-document-picture-in-picture) that allows developers to easily use this API as a zero-dependency React component.
The Document Picture-in-Picture API allows for displaying a wider variety of content compared to the PIP API, including text, images, buttons, and interactive elements. Other advantages include:
* Users can leverage DPIP for tasks like real-time editing, note-taking, managing to-do lists, or even facilitating messaging and chat functionalities while interacting with other applications.
* Developers have greater control over the appearance and functionality of the DPIP window
However, DPIP has some limitations you should be aware of:
* Only [Chrome, Opera, and Edge fully support DPIP](https://caniuse.com/mdn-api_documentpictureinpicture) as of June 2024
* DPIP may require additional development work to ensure proper accessibility for users with disabilities
Now, let’s see how to use the Document Picture-in-Picture API in a React application.
## Setting up a React app to use the DPIP API
Open your terminal and run the following command to generate a new React application:
```bash
npx create-react-app docpip
```
The above command will create a React application named `docpip` for you.
Next, navigate to the `App.js` file inside the `src` folder of your new React application and update it with the following code:
```javascript
import React, { useRef } from "react";
import ReactDOM from "react-dom/client";
import "./App.css";
function App() {
const videoRef = useRef(null);
const openWindow = async () => {
};
return (
<div className="App">
<button onClick={openWindow}>Open DocumentPIP</button>
</div>
);
}
export default App;
```
In the code above, we render a button that will open the DPIP window and set its `onClick` event to the `openWindow()` function, which currently does nothing.
Run `npm start` and navigate to http://localhost:3000 to see the live application: 
### Adding open functionality to the DPIP window
Now, let’s implement the `openWindow()` function to open the DPIP window:
```javascript
//src/App.js
const openWindow = async () => {
try {
const dpip = await window.documentPictureInPicture.requestWindow({
width: "500",
height: "500",
});
} catch (error) {
if (error) {
console.log(error);
}
}
};
```
Here, we set up an asynchronous function to open the DPIP window with specified width and height values. Back in the browser, if we click the **Open Document PIP** button, it will open up an empty new window with our specified dimensions:
### Displaying content in the DPIP window
Next, let’s show some content in the new DPIP window. In the `try` section of the `openWindow()` function, add the following snippet right below the existing code:
```javascript
//src/App.js
try {
// existing code
const pipDiv = dpip.document.createElement("div");
pipDiv.setAttribute("id", "pip-root");
dpip.document.body.append(pipDiv);
const pipRoot = ReactDOM.createRoot(
dpip.document.getElementById("pip-root")
);
pipRoot.render(<WindowContents />);
}
```
Here, we:
* Created a new `div` element on the DPIP window using the `createElement()` method
* We used `ReactDOM` and `createRoot()` methods to create a root element using the `div` we created earlier. The root element will help us display React components inside a browser DOM node
* Lastly, we used the `render()` method to render the `WindowContents` component, which we will create next on the DPIP window
Now, let’s create the `WindowContents` component. Add the following snippets before the `openWindow()` function inside the `App` component:
```javascript
//src/App.js
import React, { useRef } from "react";
import ReactDOM from "react-dom/client";
const WindowContents = () => {
return (
<div className="App">
<h2>Puppy's day out 🐶</h2>
<video ref={videoRef} controls id="pip-object" height={"400"}>
<source src="/puppy.mp4" />{" "}
</video>
<button onClick={() => window.documentPictureInPicture.window.close()}>
Close
</button>
</div>
);
};
```
In the snippets above, we set up a `<WindowContents/>` component that returns a video. We could have any arbitrary HTML content here, but I’ve decided to show a video and a button to close the DPIP window for the purposes of this demonstration. Note that the DPIP come with its own `close` functionality.
Now when we click the open document PIP button, our DPIP window will open with our contents, including a title, a video, and a **Close** button:  We have created a functional DPIP window in a React application, and we can add as much HTML content as we want. We can further extend the DPIP functionalities with other methods, like:
* `documentPictureInPicture.onenter` — Executes when the DPIP window is opened
* `pagehide` — Executes when the window is closed
You can check out the [source code for this tutorial in this GitHub repo](https://github.com/kenny-io/docpip).
## Conclusion
The Document Picture-in-Picture API in Chrome offers significant advantages for React applications, particularly regarding enhancing user experience and enabling innovative functionalities.
In this post, we discussed how to implement a DPIP window in a React application. We also saw the advantages of the new DPIP API over the existing PIP API, along with some limitations of DPIP that you should know before getting started with it.
---
##Get set up with LogRocket's modern error tracking in minutes:
1. Visit https://logrocket.com/signup/ to get an app ID.
2. Install LogRocket via NPM or script tag. `LogRocket.init()` must be called client-side, not server-side.
NPM:
```bash
$ npm i --save logrocket
// Code:
import LogRocket from 'logrocket';
LogRocket.init('app/id');
```
Script Tag:
```javascript
Add to your HTML:
<script src="https://cdn.lr-ingest.com/LogRocket.min.js"></script>
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```
3.(Optional) Install plugins for deeper integrations with your stack:
* Redux middleware
* ngrx middleware
* Vuex plugin
[Get started now](https://lp.logrocket.com/blg/signup) | leemeganj |
1,909,835 | Stored Procedures & Exception Handling when migrating from Oracle to PostgreSQL or YugabyteDB | Lot of companies hope to find a solution to easily move their PL/SQL code from Oracle Database to... | 0 | 2024-07-03T16:42:50 | https://dev.to/aws-heroes/stored-procedures-exception-handling-when-migrating-from-oracle-to-postgresql-or-yugabytedb-3i2e | oracle, postgres, yugabytedb, migration | Lot of companies hope to find a solution to easily move their PL/SQL code from Oracle Database to PostgreSQL or PostgreSQL-compatible managed services such as Amazon Aurora or YugabyteDB. The AWS Schema Conversion Tool and YugabyteDB Voyager are helpful tools for this, but migrating the syntax is just one aspect of the process. Each database engine behaves differently, and failing to understand these differences can result in unexpected outcomes.
## An example
I have two tables: gamers, each with a specified amount of cash, and bids. The business logic is deployed as a stored procedure. A business rule specifies that no bid can exceed $10, which is enforced by a check constraint. If this rule is violated, no error is raised, but the bid is considered a no-op, resulting in a $0 bid with a rejection comment. The constraint violation is catched by the stored procedure code.
## The original Oracle PL/SQL code
Here is my code in Oracle:
```sql
create table gamers (
name varchar2(50) primary key,
cash number(10, 2)
);
create table bids (
name varchar2(50) references gamers,
bid_amount number(5, 2),
bid_time timestamp default current_timestamp,
operation_text varchar2(255),
constraint bid_amount_check check (bid_amount <= 10)
);
create or replace procedure insert_bid
(p_name in varchar2, p_bid_amount in number) is
bid_too_high exception;
pragma exception_init(bid_too_high, -2290); -- check constraint violated
l_cash number(10, 2);
begin
-- Deduct the cash amount
update gamers
set cash = cash - p_bid_amount
where name = p_name;
-- Insert the bid
insert into bids (name, bid_amount, operation_text)
values (p_name, p_bid_amount, 'new bid');
exception
when bid_too_high then
-- Reverse the cash deduction
update gamers
set cash = cash + p_bid_amount
where name = p_name;
-- Insert the no-op bid
insert into bids (name, bid_amount, operation_text) values
(p_name, 0, 'attempted bid of ' || p_bid_amount || ' rejected');
end;
/
```
Let's run it. I have a gamer with $42 and making 3 bids:
- Bid $20, which exceeds the maximum possible bid in the table.
- Bid $2, which should be successful.
The final cash amount should be $40.
```sql
SQL> column name format a8
SQL> column bid_time format a30
SQL> column operation_text format a30
SQL> set linesize 100
SQL>
SQL> insert into gamers values ('G4mR', 42);
1 row created.
SQL> commit;
Commit complete.
SQL>
SQL> execute insert_bid('G4mR', 20);
PL/SQL procedure successfully completed.
SQL> commit;
Commit complete.
SQL> execute insert_bid('G4mR', 2);
PL/SQL procedure successfully completed.
SQL> commit;
Commit complete.
SQL> select * from gamers;
NAME CASH
-------- ----------
G4mR 40
SQL> select * from bids;
NAME BID_AMOUNT BID_TIME OPERATION_TEXT
-------- ---------- ------------------------------ ------------------------------
G4mR 0 03-JUL-24 08.09.29.742321 AM attempted bid of 20 rejected
G4mR 2 03-JUL-24 08.09.31.626613 AM new bid
```
That's the correct result. Let's try to convert that to PostgreSQL.
## Using AWS SCT to transform it to PostgreSQL
I've used AWS Schema Conversion Tool to get the equivalent PostgreSQL syntax:
SCT used the proprietary `aws_oracle_ext.ora_exception` which I simplified to be PostgreSQL compatible by simply checking `check_violation`:
```sql
CREATE OR REPLACE PROCEDURE insert_bid
(IN p_name TEXT, IN p_bid_amount DOUBLE PRECISION)
AS
$BODY$
DECLARE
l_cash NUMERIC(10, 2);
BEGIN
/* Deduct the cash amount */
UPDATE gamers
SET cash = cash - p_bid_amount
WHERE name = p_name;
/* Insert the bid */
INSERT INTO bids (name, bid_amount, operation_text)
VALUES (p_name, p_bid_amount, 'new bid');
EXCEPTION
WHEN check_violation THEN
UPDATE gamers
SET cash = cash + p_bid_amount
WHERE name = p_name;
/* Insert the no-op bid */
INSERT INTO bids (name, bid_amount, operation_text)
VALUES (p_name, 0, CONCAT_WS('', 'attempted bid of ', p_bid_amount, ' rejected'));
END;
$BODY$
LANGUAGE plpgsql;
```
If you know how PostgreSQL works you already spot the problem.
## Wrong result with the same logic in PostgreSQL
Let's test it:
```sql
yugabyte=# insert into gamers values ('G4mR', 42);
INSERT 0 1
yugabyte=# begin; call insert_bid('G4mR', 20); commit;
BEGIN
CALL
COMMIT
yugabyte=# begin; call insert_bid('G4mR', 2); commit;
BEGIN
CALL
COMMIT
yugabyte=# select * from gamers;
name | cash
------+-------
G4mR | 60.00
(1 row)
yugabyte=# select * from bids;
name | bid_amount | bid_time | operation_text
------+------------+----------------------------+------------------------------
G4mR | 2.00 | 2024-07-03 12:43:08.643212 | new bid
G4mR | 0.00 | 2024-07-03 12:43:07.522352 | attempted bid of 20 rejected
(2 rows)
```
The logic that was written for Oracle doesn't work correctly in PostgreSQL. Instead of decreasing to $40, the cash increases from $42 to $60.
This is because, in PostgreSQL and YugabyteDB, the PL/pgSQL block is atomic and doesn't need compensation in the exception block like in Oracle.
To prevent partial changes when entering the exception block, the main block rolls back before entering the exception block. Unlike in Oracle, there's no need to clean up or compensate for partial changes in the exception block.
## The right logic for PostgreSQL and YugabyteDB
Here is the correct code, much simpler. It implicitly rolls back the update of the cash in the gamers' table when entering the exception so that the exception only has to insert the no-op bid.
```sql
CREATE OR REPLACE PROCEDURE insert_bid
(IN p_name TEXT, IN p_bid_amount DOUBLE PRECISION)
AS
$BODY$
DECLARE
l_cash NUMERIC(10, 2);
BEGIN
/* Deduct the cash amount */
UPDATE gamers
SET cash = cash - p_bid_amount
WHERE name = p_name;
/* Insert the bid */
INSERT INTO bids (name, bid_amount, operation_text)
VALUES (p_name, p_bid_amount, 'new bid');
EXCEPTION
WHEN check_violation THEN
/* Insert the no-op bid */
INSERT INTO bids (name, bid_amount, operation_text)
VALUES (p_name, 0, CONCAT_WS('', 'attempted bid of ', p_bid_amount, ' rejected'));
END;
$BODY$
LANGUAGE plpgsql;
```
Without any attempt to compensate for changes, because that is done by the database, it provides the right result:
```sql
yugabyte=# insert into gamers values ('G4mR', 42);
INSERT 0 1
yugabyte=# begin; call insert_bid('G4mR', 20); commit;
BEGIN
CALL
COMMIT
yugabyte=# begin; call insert_bid('G4mR', 2); commit;
BEGIN
CALL
COMMIT
yugabyte=# select * from gamers;
name | cash
------+-------
G4mR | 40.00
(1 row)
yugabyte=# select * from bids;
name | bid_amount | bid_time | operation_text
------+------------+----------------------------+------------------------------
G4mR | 2.00 | 2024-07-03 12:53:50.889344 | new bid
G4mR | 0.00 | 2024-07-03 12:53:49.787083 | attempted bid of 20 rejected
(2 rows)
```
PostgreSQL implicitly creates a savepoint at the beginning of execution. It's important to note that savepoints can be expensive in PostgreSQL, even though it has been optimized for PG17. On the other hand, YugabyteDB behaves similarly to PostgreSQL but with a scalable implementation that avoids the issues related to savepoints.
This example demonstrates that the most crucial aspect of migration is not just switching between languages but also verifying the behavior and outcome. To avoid being locked in with a particular vendor, it is important to have a good understanding of how both databases work and good regression tests that encompass all your business logic. | franckpachot |
1,910,312 | How to Integrate FCM Push Notification in Bare React Native App. | Integrating push notifications can significantly enhance the user experience in your mobile app by... | 0 | 2024-07-03T16:42:35 | https://dev.to/tacredoc/how-to-integrate-fcm-push-notification-in-bare-react-native-app-2c6j | react, reactnative, javascript, fcm | **Integrating push notifications can significantly enhance the user experience in your mobile app by keeping users engaged and informed. Recently, I had to integrate Firebase Cloud Messaging (FCM) push notifications into one of my React Native apps. However, I struggled to find a comprehensive resource that provided a clear, step-by-step guide for a bare React Native project—most tutorials focused on Expo. In this article, I'll share my experience and provide a detailed guide to help you seamlessly implement FCM push notifications in your bare React Native app.**
**This article is divided into two sections: the first covers setting up FCM, and the second focuses on integrating it into your code. Let's dive in and get started!**
## Section 1: Creating and setting up FCM Project.
**Step 1:** Go to [Firebase Console] (https://console.firebase.google.com/) and create a new project.
**Step 2:** Once the project is created then click on the android icon highlighted and follow along.
**Step 3:** Here you need to enter the package name which you can find at the following path: `android/app/src/main/java/com/'your_project_name'/MainApplication.kt`
**Step 4:** In the next step you need to download the `google-services.json` file and place it at the following path: `android/app`
**Step 5:** Now we need to make couple of modification in some files to add the firebaseSDK.
* First open the file in path: `android/build.gradle` and add one more line in the dependencies
```
classpath("com.google.gms:google-services:4.4.2")
```
* Second open the file in path: `android/app/build.gradle` and the following line on the top where plugins are added
```
apply plugin: "com.google.gms.google-services"
```
, now scroll down to the end of that file where in the dependencies object you need to add these lines:
```
implementation platform('com.google.firebase:firebase-bom:33.1.1')
implementation 'com.google.firebase:firebase-analytics'
```
**Step 6:** After making these changes you can go back to the firebase console and finish the setup and then navigate to the project settings page
** Now we are done with the Firebase console setup and now we will learn how can we implement the functionality of how to handle background as well as foreground notifications**
## Section 2: Implementing the notification handling functionality in code.
**Step 1:** First we need to install the following packages:
```
npm install @react-native-firebase/app
npm install @react-native-firebase/messaging
```
**Step 2:** Now we need to create a service file where we will be writing the code to handle notifications, I am following a folder structure so the way I have created it is by creating a new folder called src in root directory and then inside that I created another folder called service in which I have created a file called `fcmService.js` as you can see below:
**Step 3:** Copy and paste the code given below in `fcmService.js`:
```js
import messaging from '@react-native-firebase/messaging';
import {Alert} from 'react-native';
async function requestUserPermission() {
const authStatus = await messaging().requestPermission();
const enabled =
authStatus === messaging.AuthorizationStatus.AUTHORIZED ||
authStatus === messaging.AuthorizationStatus.PROVISIONAL;
if (enabled) {
console.log('Authorization status:', authStatus);
}
}
export async function getFCMToken() {
const fcmToken = await messaging().getToken();
if (fcmToken) {
console.log(fcmToken);
} else {
console.log('Failed', 'No token received');
}
}
// Foreground Notifications: When the application is opened and in view.
messaging().onMessage(async remoteMessage => {
Alert.alert('A new FCM Message arrived!!!', JSON.stringify(remoteMessage));
});
// Background Notifications: When the application is open, however in the background (minimised).
messaging().setBackgroundMessageHandler(async remoteMessage => {
console.log('Message handled in the background!!!', remoteMessage);
});
export default requestUserPermission;
```
**Step 4:** Import both the methods `requestUserPermission` & `getFCMToken` in App.tsx and call the methods in the useEffect along with the initialNotification method like shown below:
**Step 5:** Once all this setup is done you can run the command `npx `react-native run-android` in your terminal which will launch the android emulator. Now we will see how can we test out the notification using FCM console.
**Step 6:** Go to All Products in Firebase console in your project
**Step 7** Now scroll down to the Run section and click on Cloud Messaging
**Step 8** Now click on Create your first campaign and then select
Firebase Notification messages
**Step 9** Now we are at the final step where we need to define what notification we need to send and on which device. Now fill the info like Notification Title & Notification Text you can optionally also add the image url then the image will also appear in the notification. After filling up the info click on Send Test Message on the right, now it will ask for FCM registration token. If you check the code above in the getFCMToken method we are doing console.log() after fetching the token. So the token should already be logged in your terminal like shown below:
**Step 10:** Now copy the token from terminal and paste it in the FCM Token field and add it then click the test button. If your app is in the foreground then you should see a notification like below:
**Step 11:** If the app is minimized and you send a push notification then you should be able to see the notification on the top bar like shown below:
**Note: If the background notification is not showing up in your app then you just need to go to the settings and then apps and turn on the notification permission like shown below*
*Congratulations! You have successfully integrated Firebase Cloud Messaging (FCM) push notifications into your React Native app. By following the steps outlined in this guide, you should now be able to send and receive push notifications, keeping your users engaged and informed.**
**Thank you for reading, and I hope you found this article helpful. This is my first article, so I apologize for any mistakes or oversights. If you have any questions or feedback, please feel free to reach out. Happy coding!**
| tacredoc |
1,910,404 | ¿Trabajo Remoto o Híbrido? | ¿De verdad es híbrido si me obligan a ir presencial? | 0 | 2024-07-03T16:42:00 | https://dev.to/javascriptchile/trabajo-remoto-o-hibrido-5f2o | work, chile, remote, spanish | ---
title: ¿Trabajo Remoto o Híbrido?
published: true
description: ¿De verdad es híbrido si me obligan a ir presencial?
tags: work, chile, remote, spanish
cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/9xaf2hevej0xqocbu2k3.jpg
---
Este es un pequeño artículo sobre reflexiones sobre los llamados trabajos "Híbridos" y la necesidad de establecer una definición adecuada para no confundir.
## Trabajo Presencial
Primero tendremos el trabajo presencial, el cual estás obligado a ir a una oficina o lugar específico para ejercer tus labores. En la pandemia del 2020 vimos un cambio hacia lo remoto. Los primeros años de la década del 2020 demostraron que si se puede trabajar remotamente para gran parte de las labores tech.
## Trabajo Híbrido
Luego de la pandemia comenzaron a surgir los llamados trabajos "híbridos". Hay una clara mal interpretación de lo que es trabajo Híbrido. Se puede asumir de que "Algunos días remoto y algunos días presencial", pero esto causa confusión.
La definición que propongo híbrido es lo siguiente:
- Se trabaja en un horario y zona horaria específica.
- Se tiene a disposición una oficina pero es **opcional** asistir.
- Es obligación estar dentro de un territorio (Por ejemplo dentro de Chile, por temas legales, tributarios y otros).
En términos simples, si te obligan a ir presencial entonces es un trabajo presencial y no híbrido.
## Trabajo Remoto
El trabajo remoto es similar al híbrido con la salvedad de que puede ser en cualquier parte del mundo o zona horaria, no tienes la obligación de estar en el mismo país donde esta el trabajo.
Es más pensado para ofertas laborales en el extranjero donde tu debas pagar tus propias cotizaciones, previsión de salud y pagar los costes de transferencias.
## ¿Por qué es importante?
Muchas personas dicen que les gusta ir a la oficina por diversos motivos. Se confunde muchas veces trabajar remotamente con trabajar desde casa. Lo cual es erróneo. Trabajar remoto simplemente significa que tienes la libertad de trabajar donde sea más cómodo. Puede incluso ser una oficina, pero la clave es la libertad de elección donde se trabaja. Es por esto que muchos defienden el ir presencial a una oficina y privilegian por sobre la opción remota. El drama es que no debería ser obligatorio ir a la oficina en un trabajo híbrido, es opcional y no habría problemas si deseas trabajar fuera de ella todo el tiempo. La oficina se transforma en un espacio de cowork opcional más que un lugar de sometimiento y esclavitud a horarios y expectativas de calentar sillas.
Piensa todas las horas de vida que pierdes solo por ir a un lugar obligado, costos en salud mental, costos de alimentación y transporte. Costos que asumes personalmente y no la empresa.
Que tu relación laboral sea de mutuo beneficio y no unilateral para la empresa.
Como profesionales de la tecnología está en nuestro poder exigir este beneficio a las empresas. Si nos sometemos el ir presencial obligadamente, afectaremos tanto a nuestra salud mental como a los seres queridos que tenemos y principalmente afectamos a la industria en general haciendo más fome las condiciones laborales para todos los miembros del oficio.
## Conclusión
Prioriza tu vida y tu salud mental y financiera, prefiere siempre trabajos donde sea opcional ir presencial.
- Imagen: https://commons.wikimedia.org/wiki/File:Remote_work_Telelavoro_1.jpg | clsource |
1,910,434 | Essential Expert Tips for Developing eCommerce Websites | With the advent of the internet, many industries including the eCommerce industry have expanded... | 0 | 2024-07-03T16:41:55 | https://dev.to/manzella/essential-expert-tips-for-developing-ecommerce-websites-nl7 | webdev, beginners, web, website | With the advent of the internet, many industries including the eCommerce industry have expanded tremendously in the last decade and it is now critical for businesses to have a strong online platform to remain relevant. Creating an eCommerce site that will experience success on the internet requires much more than the listing of products on the Internet. It is not a mere craft or art form that can be made easily without much planning and hard work. No matter if you are designing the site from scratch or redesigning it from the ground up, these tips and tricks from the experts will help you in too in creating an effective and persuasive [eCommerce site](https://www.shopify.com/blog/ecommerce-website-cost).
#1. Invest in Professional Development#
One of the most critical steps in building a high-quality eCommerce website is to [hire an eCommerce developer](https://www.developers.dev/hire-ecommerce-application-development-team/). Professional developers bring a wealth of experience and technical expertise, ensuring that your site is not only visually appealing but also functional and secure. A seasoned eCommerce developer can tailor the website to your specific business needs, integrating necessary features such as payment gateways, inventory management, and customer relationship management systems.
#2. Prioritize User Experience (UX)#
Good user experience is the key to any successful eCommerce site since the success of a site is determined by how its users interact with the content displayed. The [structural](https://dev.to/t/structural)/[functional](https://dev.to/t/functional) website design gives site users a hassle-free experience reviewing your products, comparing them with others, and purchasing them online. Here are a few key aspects to focus on:
**Responsive Design**
Make sure to optimize your website to work on different platforms and be compatible with all operating systems and devices.
**Fast Loading Times**
Image resizer and implemented good coding techniques so that the page takes less time to load.
**Clear Navigation**
Introduce clear and clear main navigation to support the orientation for the users where they likely will be able to address their needs.
Spending more time and money on UX design also affects addressing customer satisfaction as well as the conversion of the latter.
#3. Implement Strong Security Measures#
It is crucial to prevent and minimize risks when it comes to eCommerce. The specific amount of money and, the customer's details, they should feel are protected. Here are some essential [security measures](security measures) to implement:
**SSL Certificates**
An SSL certificate is another feature that encrypts all the data exchanged between your site and the visitors to safeguard any valuable information that could be shared.
**PCI Compliance**
Make sure that your payment and credit card processing and transactional systems meet the PCI DSS standard.
**Regular Security Audits**
Security maintenance and constant threat identification should be detected through security audits and vulnerability assessments.
Investing in security is an extremely effective way of winning the trust of your customers in the first place, which will help you achieve sustainable growth in the long term.
#4. Focus on Search Engine Optimization (SEO)#
Promotion forms a critical part of internet marketing for any eCommerce business and among the significant procedures is [Search Engine Optimization](https://developers.google.com/search/docs/fundamentals/seo-starter-guide) (SEO). Search Engine Optimization strategies will enable your site to rank higher in page results hence improving the opportunity to attract customers. Key SEO practices include:
**Keyword Research**
To do this, it is crucial to ascertain and capture key terms that potential customers are likely to use when searching for your brand or products.
**Quality Content**
Produce high-quality and unique articles for your site that will get the attention of the visitors and keep them coming back.
**On-Page SEO**
This means enhancing the content of [product descriptions](https://dev.to/medusajs/use-ai-to-create-great-product-descriptions-with-this-free-plugin-1jph), arranging meta tags, and tuning up URLs for improved search.
**Technical SEO**
Make sure that your site does not have any of these issues: unpleasant look and feel, unwieldy structure that is tough for the search engine to crawl, and slow loading.
An adequate level of SEO campaign results guarantees a large flow of potential buyers to your site.
#5. Offer Excellent Customer Support#
Hence, customer support service plays an ever-more significant role in keeping the customers and establishing more trust in business. Here are some ways to enhance customer support on your eCommerce website:
**Live Chat**
Include the live chat option for quick assistance to the clients as and when they need it.
**Comprehensive FAQ Section**
Utilize subheadings effectively and stay away from using bullet points to help create a comprehensive list of questions and answers in the form of an FAQ section.
**Easy Returns and Refunds**
To strengthen customer trust, should ensure that the returns and refunds policy has been stated clearly and understandably.
Hearing from the customers, one can be well-equipped to attend promptly to their needs, and this may well place your brand above the rest of the brands.
**Conclusion**
It is crucial to understand that creating a viable [eCommerce](https://dev.to/themodernweb/how-to-make-an-e-commerce-website-with-html-css-and-js-3aon) business involves proper market research and planning, adequate implementation of strategies and processes, and constant improvement of the website. To build an eCommerce store that customers want to use, this means investing in staff training, having strong user design, implementing tough security to stop hacking and fraud, focusing on SEO, and providing splendid client support.
Follow these guidelines when you are starting your eCommerce venture and make your online business successful in this growing ECommerce space. | manzella |
1,910,433 | **🌟 Mastering the Java Collections Framework 🌟** | Are you ready to take your Java skills to the next level? Dive into the powerful Collections... | 0 | 2024-07-03T16:41:43 | https://dev.to/gadekar_sachin/-mastering-the-java-collections-framework--4kcd | webdev, programming, beginners, java |
Are you ready to take your Java skills to the next level? Dive into the powerful Collections Framework! 🚀
**Why Collections Framework?**
- **Efficiency:** Collections provide data structures like Lists, Sets, and Maps, allowing efficient data storage and manipulation.
- **Flexibility:** Use different implementations based on your needs, like `ArrayList`, `HashSet`, and `HashMap`.
- **Ease of Use:** Simplifies complex algorithms and data management with built-in methods.
**Key Components:**
1. **List:**
- Ordered and allows duplicates.
- Common implementations: `ArrayList`, `LinkedList`.
- Example:
```java
List<String> list = new ArrayList<>();
list.add("Java");
list.add("Python");
list.add("JavaScript");
```
2. **Set:**
- Unordered and does not allow duplicates.
- Common implementations: `HashSet`, `TreeSet`.
- Example:
```java
Set<String> set = new HashSet<>();
set.add("Java");
set.add("Python");
set.add("Java"); // Duplicate entry, will not be added.
```
3. **Map:**
- Stores key-value pairs.
- Common implementations: `HashMap`, `TreeMap`.
- Example:
```java
Map<Integer, String> map = new HashMap<>();
map.put(1, "Java");
map.put(2, "Python");
```
**Pro Tips:**
- Always choose the right collection type for your specific needs.
- Be aware of thread safety. Use synchronized collections or `java.util.concurrent` for concurrent operations.
- Explore Java 8+ enhancements, like Streams and Lambda expressions, to make your code more readable and efficient.
Embark on your journey with Java Collections today and watch your productivity soar! 🚀✨ | gadekar_sachin |
1,910,403 | Content Marketing for Tech Startup (Experienced Devs Writing) | In this article, we will guide you through a comprehensive approach to promoting your software on... | 0 | 2024-07-03T16:41:24 | https://dev.to/walleeve/content-marketing-for-tech-startup-experienced-devs-writing-4hmk | seo, developer, contentwriting, marketing |
In this article, we will guide you through a comprehensive approach to promoting your software on Google SERPs. From strategic keyword research and content creation to SEO optimization and leveraging backlink strategies,
[Engineerwriting.com](http://engineerwriting.com) presents this article to guide you through the process of promoting your software effectively in Google SERPs. Let's dive in to discover actionable strategies and insights that will enhance your software's visibility and drive business growth.
### Step 1: Study Customer Software and Its Benefits
#### 1. Understand Features and Benefits:
- **Technical Documentation Review**: Analyze technical documents, user manuals, and product specifications provided by the software development team.
- **Feature Mapping**: Create a comprehensive list of all software features, categorizing them by core functionalities, unique features, and competitive advantages.
- **Benefit Identification**: Translate features into benefits that address specific pain points or challenges faced by target customers.
- **User Experience (UX) Analysis**: Evaluate the software from a user's perspective to understand usability, interface design, and overall user satisfaction.
#### 2. Target Audience Analysis:
- **Persona Development**: Develop detailed customer personas based on demographics (age, gender, location), psychographics (interests, behaviors), and job roles (IT managers, developers, end-users).
- **Customer Journey Mapping**: Map out the customer journey from awareness to post-purchase support, identifying key touchpoints where content can influence decision-making.
- **Segmentation Strategy**: Segment audiences based on usage scenarios (enterprise vs. SMBs), industry verticals (healthcare, finance), or specific pain points addressed by the software.
- **Competitive Positioning**: Conduct SWOT analysis (Strengths, Weaknesses, Opportunities, Threats) to understand how competitors position themselves and differentiate your software accordingly.
#### 3. Competitor Analysis:
- **Direct Competitor Analysis**: Identify primary competitors offering similar software solutions through competitive intelligence tools (e.g., SimilarWeb, SpyFu).
- **Feature Comparison**: Create feature matrices or comparison charts to highlight strengths and weaknesses relative to competitors.
- **Unique Selling Proposition (USP) Definition**: Define clear USPs that differentiate your software, such as superior performance, scalability, integration capabilities, or cost-effectiveness.
- **Market Opportunity Assessment**: Identify emerging trends, gaps in competitor offerings, or underserved market segments where your software can gain a competitive advantage.
### Step 2: Conduct Keyword Research For Technical Content Writing
#### 1. Identify Relevant Keywords:
- **Keyword Research Tools**: Use advanced keyword research tools (e.g., Moz Keyword Explorer, KeywordTool.io) to generate a comprehensive list of relevant keywords.
- **Long-Tail Keyword Identification**: Prioritize long-tail keywords that reflect specific user queries, intent, and conversational search trends.
- **Keyword Clustering**: Group related keywords into clusters based on semantic relevance or thematic content pillars (e.g., software features, industry use cases, troubleshooting guides).
- **Search Volume and Competition Analysis**: Evaluate keyword metrics such as search volume, difficulty, and click-through rates (CTR) to prioritize high-impact keywords for content creation.
#### 2. Content Gap Analysis:
- **Content Audit**: Conduct a thorough audit of existing content assets to identify gaps in coverage or outdated information that require updating.
- **Competitor Content Analysis**: Analyze top-ranking competitor content to identify gaps in topics or keywords not currently addressed on your website.
- **Content Ideation**: Brainstorm new content ideas based on keyword opportunities, trending topics in the industry, or frequently asked questions (FAQs) from customers.
- **Content Calendar Planning**: Develop a content calendar outlining topics, keywords, publication dates, and responsible stakeholders to ensure consistent content creation and optimization efforts.
#### 3. SEO Tool Utilization:
- **Tool Integration**: Integrate SEO tools (e.g., SEMrush, Ahrefs) with content management systems (CMS) or analytics platforms to streamline keyword research and performance tracking.
- **Competitive Insights**: Use SEO tools to analyze competitor strategies, identify top-performing content, and benchmark performance metrics against industry standards.
- **Ranking Opportunities**: Identify low-hanging fruit keywords (e.g., low competition, high search volume) to prioritize for quick SEO wins and incremental traffic growth.
- **Keyword Expansion Strategies**: Utilize keyword expansion techniques such as related search queries, autocomplete suggestions, and semantic keyword variations to broaden content reach and visibility.
### Step 3: Create Content Editor in Surfer SEO
#### 1. Content Structure Optimization:
- **Surfer SEO Integration**: Utilize Surfer SEO's content editor to optimize content structure based on real-time SEO recommendations and best practices.
- **Header Tags Optimization**: Implement hierarchical header tags (H1, H2, H3) to organize content and signal topic relevance to search engines.
- **Content Formatting**: Incorporate bullet points, numbered lists, and bold/italic formatting to enhance readability and user engagement.
- **Keyword Density Management**: Maintain optimal keyword density while ensuring natural integration throughout the content to avoid keyword stuffing penalties.
#### 2. On-page SEO Optimization:
- **Meta Tags Optimization**: Craft compelling meta titles and meta descriptions incorporating primary keywords and compelling calls-to-action (CTAs) to improve click-through rates (CTR).
- **URL Structure Enhancement**: Optimize URL slugs to include relevant keywords, shortening URLs for clarity and SEO-friendliness.
- **Rich Snippets and Schema Markup**: Implement structured data markup (e.g., JSON-LD) to enhance search engine understanding of content types (e.g., reviews, FAQs, product information).
- **Internal Linking Strategy**: Develop a cohesive internal linking strategy to establish content hierarchy, distribute link equity, and improve navigation for both users and search engines.
#### 3. Content Quality Assurance:
- **Editorial Guidelines Adherence**: Enforce editorial guidelines to maintain consistency in tone, style, and brand voice across all content assets.
- **Content Validation**: Verify technical accuracy and authenticity of information through collaboration with subject matter experts (SMEs) or software developers.
- **Visual and Multimedia Integration**: Enhance content engagement with multimedia elements (e.g., infographics, videos, interactive charts) that illustrate complex concepts or enhance user understanding.
- **Accessibility and User Experience (UX)**: Ensure content accessibility by optimizing for screen readers, captioning multimedia content, and adhering to web accessibility standards (WCAG).
### Step 4: Collaborate with Technical Content Writing by Real Software Developer
#### 1. Technical Accuracy Verification:
- **Developer Consultation**: Collaborate closely with software developers to validate technical content accuracy, terminology usage, and industry-specific jargon.
- **Peer Review Process**: Establish a peer review process involving cross-functional teams (e.g., developers, QA engineers, product managers) to ensure content alignment with product capabilities.
- **Documentation Review**: Refer to software documentation, API guides, and technical specifications to incorporate accurate details and specifications into content assets.
- **User Interface (UI) Documentation**: Translate UI/UX design elements and functionalities into user-friendly content that resonates with target audiences.
#### 2. Use Case Development:
- **Scenario-Based Content Creation**: Develop use case scenarios that showcase real-world applications of the software, addressing specific pain points and user challenges.
- **Customer Testimonials and Case Studies**: Integrate customer testimonials, success stories, and case studies that validate software performance and effectiveness in solving customer problems.
- **Value Proposition Communication**: Articulate unique value propositions (UVPs) and competitive advantages through compelling storytelling and evidence-based content.
#### 3. Developer Insights Integration:
- **Technical Blogging**: Leverage developer insights and expertise to craft technical blog posts, white papers, or thought leadership articles that resonate with a technically savvy audience.
- **FAQ and Knowledge Base Creation**: Compile frequently asked questions (FAQs) and troubleshooting guides based on developer input to address common user inquiries and support issues.
- **API Documentation and Integration Guides**: Develop comprehensive API documentation and integration guides that facilitate seamless adoption and usage of software functionalities by developers and IT professionals.
### Step 5: Review and Revise Content with Customer Feedback
#### 1. Feedback Collection Process:
- **Customer Feedback Channels**: Implement multiple feedback channels, including surveys, social media listening, website analytics, and customer support interactions.
- **Sentiment Analysis**: Analyze customer sentiment and feedback trends to identify recurring themes, pain points, and areas for improvement in content effectiveness.
- **Voice of Customer (VoC) Analysis**: Leverage VoC data to personalize content recommendations, address customer needs, and enhance user experience across digital touchpoints.
- **Net Promoter Score (NPS) Surveys**: Measure customer satisfaction and loyalty through NPS surveys to gauge content impact on brand advocacy and customer retention.
#### 2. Usability Testing:
- **A/B Testing and Multivariate Testing**: Conduct iterative testing of content variations (e.g., headlines, CTAs, layout designs) to optimize user engagement and conversion rates.
- **Heatmap Analysis**: Utilize heatmap tools to visualize user interactions, scrolling behavior, and click patterns on content pages to inform UX improvements.
- **User Journey Mapping**: Map out user journeys across content touchpoints to identify friction points, drop-off stages, and opportunities for content personalization.
- **Accessibility Audits**: Perform accessibility audits to ensure content compliance with WCAG guidelines, enhancing usability for users with disabilities and diverse needs.
#### 3. Content Iteration and Updates:
- **Content Performance Tracking**: Monitor key performance indicators (KPIs) such as bounce rate, average session duration, and conversion rates to measure content effectiveness.
- **SEO Audit and Optimization**: Conduct regular SEO audits to identify technical SEO issues, optimize metadata, and update content based on evolving search engine algorithms.
- **Content Refresh Strategy**: Implement a content refresh strategy to update outdated information, refresh visuals, and incorporate new insights or industry developments.
- **Evergreen Content Maintenance**: Maintain evergreen content assets through periodic reviews, fact-checking, and content repurposing strategies to extend content lifecycle and SEO impact.
### Step 6: Final SEO Optimization and Publishing
#### 1. Technical SEO Checklist:
- **Crawlability and Indexability**: Ensure website pages are crawlable by search engine bots and properly indexed in search engine databases.
- **Canonicalization**: Implement canonical tags to resolve duplicate content issues and consolidate link equity across duplicate or similar content variants.
- **Page Speed Optimization**: Optimize website performance by minimizing server response times, leveraging browser caching, and optimizing image and script files.
- **Mobile Responsiveness**: Design responsive web pages that adapt seamlessly to various devices and screen sizes, enhancing user experience and search engine rankings.
#### 2. Content Publishing Strategy:
- **Content Management System (CMS) Integration**: Utilize CMS platforms (e.g., WordPress, Drupal) to manage content publication schedules, revisions, and version control.
- **Content Syndication and Distribution**: Distribute content across owned, earned, and paid media channels (e.g., social media, email newsletters, industry publications) to maximize reach and engagement.
- **Localized Content Strategy**: Develop localized content strategies for international markets, incorporating multilingual SEO practices, cultural nuances, and regional search engine preferences.
- **Content Governance and Compliance**: Adhere to legal and regulatory compliance requirements (e.g., GDPR, CCPA) when publishing content, protecting user privacy and data security.
#### 3. SEO Performance Monitoring:
- **Analytics Setup and Configuration**: Configure Google Analytics, Google Tag Manager, and other analytics tools to track SEO performance metrics (e.g., organic traffic, keyword rankings, conversion rates).
- **Search Console Management**: Monitor Google Search Console for insights into search queries, click-through rates (CTR), and website indexing status to identify SEO opportunities and issues.
- **SEO Reporting and Analysis**: Generate custom SEO reports using data visualization tools (e.g., Data Studio) to communicate performance trends, ROI, and actionable insights to stakeholders.
- **Continuous Improvement Initiatives**: Implement iterative SEO strategies based on performance data, algorithm updates, and industry best practices to sustain and improve search engine rankings.
### **Step 7: Provide Ranking Position Report Using SEMrush**
1. **Ranking Monitoring Setup:**
* **Keyword Tracking:** Use SEMrush or similar tools to set up keyword tracking for targeted keywords identified in earlier steps.
* **Ranking Reports:** Generate regular ranking reports to monitor keyword positions in search engine results pages (SERPs) over time.
* **Competitor Benchmarking:** Compare your keyword rankings with competitors to identify opportunities for improvement or areas where you're outperforming.
**2.Performance Analysis:**
* **Traffic and Engagement Metrics:** Analyze organic traffic trends, click-through rates (CTR), and user engagement metrics (e.g., bounce rate, time on page).
* **Conversion Tracking:** Measure conversion rates and goal completions attributed to organic search traffic to assess content effectiveness and ROI.
* **SERP Feature Analysis:** Monitor SERP feature performance (e.g., featured snippets, knowledge graphs) to capitalize on opportunities for enhanced visibility and click-throughs.
**3.Optimization Strategies:**
* **Keyword Performance Optimization:** Optimize content based on keyword performance data, adjusting strategies to improve rankings for high-value keywords.
* **Content Updates:** Refresh and update top-performing content to maintain relevance, address emerging trends, and reinforce search engine authority.
* **Link Building Campaigns:** Develop targeted link building strategies to acquire high-quality backlinks that strengthen domain authority and improve search rankings.
### **Step 8: Find a Trust Backlink Service Site to Help Push your Article on the top of google**
1. **Backlink Acquisition Strategy:**
* **Quality Backlink Identification:** Identify reputable websites and authoritative domains relevant to your industry and target audience.
* **Guest Posting Opportunities:** Collaborate with industry influencers, thought leaders, and niche publications for guest blogging opportunities.
* **Content Syndication:** Distribute content through reputable platforms and syndication networks to earn natural backlinks and increase content visibility.
* **Resource Page Outreach:** Reach out to webmasters of resource pages and curated lists within your industry to secure backlinks through content contribution.
**2.Link Building Best Practices:**
* **Natural Link Profile:** Focus on building a diverse and natural link profile that includes a mix of editorial links, guest posts, and social citations.
* **Avoid Black Hat Tactics:** Steer clear of unethical practices such as buying links, link farms, or excessive anchor text optimization that can lead to search engine penalties.
* **Relationship Building:** Cultivate relationships with industry peers, bloggers, and influencers to foster opportunities for organic link acquisition and content collaboration.
* **Monitor Backlink Quality:** Regularly audit backlinks to identify and disavow toxic or spammy links that may negatively impact SEO performance.
**3.Backlink Performance Measurement:**
* **Backlink Analysis Tools:** Utilize backlink analysis tools (e.g., Majestic, Moz Link Explorer) to evaluate the authority, relevance, and impact of acquired backlinks.
* **Link Equity Distribution:** Track the distribution of link equity across internal pages to optimize link flow and maximize SEO benefits.
* **ROI Assessment:** Measure the return on investment (ROI) of link building efforts by correlating backlink acquisition with improvements in search engine rankings, organic traffic, and conversion rates.
### **Step 9: Check For Improvement with Software Owner to Find Gap to do more SEO Content**
1. **Performance Review Meetings:**
* **Regular Reporting:** Schedule periodic meetings with software owners, stakeholders, and marketing teams to review SEO performance metrics and campaign outcomes.
* **Data-driven Insights:** Present actionable insights derived from SEO analytics, highlighting areas of improvement, emerging trends, and competitive benchmarking.
* **Goal Alignment:** Align SEO objectives with broader business goals (e.g., lead generation, brand visibility) to prioritize initiatives that drive measurable business impact.
* **Gap Identification:** Identify gaps in content coverage, keyword targeting, or technical SEO issues that require strategic adjustments or additional resources.
**2.Competitor Analysis Updates:**
* **Competitive Benchmarking:** Continuously monitor competitor strategies, content tactics, and SEO initiatives to stay ahead of industry trends and market dynamics.
* **SWOT Analysis Refinement:** Update SWOT analyses based on evolving competitive landscapes, regulatory changes, or shifts in customer preferences.
* **Opportunity Exploration:** Explore new opportunities for innovation, product differentiation, or market expansion informed by competitive insights and market intelligence.
**3.SEO Roadmap Development:**
* **Action Planning:** Develop an actionable SEO roadmap outlining prioritized initiatives, timelines, and resource allocations based on identified gaps and strategic priorities.
* **Cross-functional Collaboration:** Foster collaboration between SEO specialists, content creators, developers, and marketing teams to execute SEO strategies effectively.
* **Performance Forecasting:** Forecast expected outcomes and ROI from planned SEO activities, setting realistic targets and key performance indicators (KPIs) for monitoring progress.
### **Step 10: Contact Us for More Information and Support**
1. **Lead Generation and Conversion Optimization:**
* **Call to Action (CTA) Optimization:** Enhance CTAs across digital touchpoints (e.g., website, blog posts, social media) to encourage lead generation and customer inquiries.
* **Lead Capture Forms:** Implement lead capture forms, gated content offers, or newsletter subscriptions to capture visitor information and nurture prospects.
* **Sales Funnel Alignment:** Align content SEO strategies with the sales funnel stages (awareness, consideration, decision) to guide prospects through the buying journey.
* **Conversion Rate Optimization (CRO):** Test and optimize landing pages, CTAs, and conversion paths using A/B testing, heatmaps, and user behavior analysis tools.
**2.SEO Consultation and Support:**
* **Free Consultation Offer:** Provide opportunities for prospective clients to schedule free SEO consultations through dedicated landing pages or contact forms.
* **Expert Advice and Insights:** Position your team as industry experts by offering thought leadership content, webinars, or workshops on SEO best practices and trends.
* **Customer Support Integration:** Integrate SEO consultation and support services into customer service channels to address inquiries, provide guidance, and resolve technical issues promptly.
* **Feedback Collection:** Gather customer feedback and testimonials from SEO consultation clients to showcase success stories and build credibility in the industry.
**3.Continuous Improvement and Feedback Loop:**
* **Feedback Integration:** Incorporate client feedback and testimonials into SEO consultation offerings to refine service delivery and enhance customer satisfaction.
* **Service Expansion:** Explore opportunities to expand SEO consultation services by addressing niche markets, vertical-specific challenges, or emerging industry trends.
* **Performance Measurement:** Track client satisfaction metrics, referral rates, and repeat business to gauge the effectiveness of SEO consultation services and identify areas for enhancement.
* **Professional Development:** Invest in ongoing training and certification for SEO consultants to stay abreast of industry developments, algorithm updates, and advanced SEO techniques.
Visit [](http://engineerwriting.com)[engineerwriting.com](http://engineerwriting.com) today to schedule your free SEO consultation. Discover how our expert team can tailor strategies to promote your software effectively, reaching potential clients and maximizing your digital presence
### | walleeve |
1,905,808 | Cable Puller -> Bug Sniffer -> Business Builder :: My Unexpected Journey | [This post is a bit of a long one, so grab a snack, a drink, and enjoy the trip!] I've spent years... | 0 | 2024-07-03T16:41:15 | https://dev.to/statueofdavid/cable-puller-bug-sniffer-business-builder-my-unexpected-journey-47m4 | webdev, career, business, life | [This post is a bit of a long one, so grab a snack, a drink, and enjoy the trip!]
<img width="100%" style="width:100%" src="https://i.giphy.com/media/v1.Y2lkPTc5MGI3NjExdjhmYTBvb3IyZnA5d25yMTNsdHlmaHo5OWhibnp3eWtodGx1NmJqNiZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/QZDM1VLEvDmjvRDcZt/giphy.gif">
I've spent years helping software teams deliver solutions with high confidence, but always under someone else's vision: mentors, CEOs, VPs, even the occasional know-it-all developer. Now, however, I'm on my own. Freedom Finally? Except... there's a persistent echo chamber in my head, a chorus whispering doubts. (à la you are on the stage for The Voice competition, no coach is turning their chairs around, and your song is almost over!)
<img width="100%" style="width:100%" src="https://i.giphy.com/media/v1.Y2lkPTc5MGI3NjExcHM3NzlucDc5aXkzcGg0cjA5eXdxdjF3MzZwaThnampjZnliYzJkZSZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/nsL4MTXWN261xij8zR/giphy.gif">
<u>**Stirred, not Shaken**</u>
The other day a recruiter delivered a brutal truth bomb: my resume is a jumbled mess, and therefore a "difficult hire in this economy." It stung, because there was truth in it. I'd been clinging to the idea that my diverse experience was a strength, a selling point. Maybe it was. But right now, it read I am a talker with no action. In today's world, without resources and the ability to turn ideas into reality, you can feel pretty worthless in the business game. Hold on, let's re-frame that. Your inherent value isn't tied to your bank account. That recruiter's "worthless" comment? A wake-up call, not a coffin.
The truth is my diverse experience wasn't random. It stemmed from a long-held dream of launching my own business. Even before my career in Information Systems. I wanted my own business. The 'so what do you really want to do?' question in interviews always throw me, even to this day. Part of me craved the stability and learning a traditional job offered, a way to reliability provide for the family my wife and I had created while gaining the practical skills needed to eventually strike out on my own. But the other part, the all consuming part, yearned to turn my ideas into reality. Maybe the hiring manager wouldn't understand this internal struggle, but that recruiter's comment was a turning point. It forced me to confront my own fear and take action. It's time to bridge the gap between my vision and the resources I need to make it a reality. Even with limited resources, there are ways to navigate the "rules of the game" and find the tools you need. I know it is possible because I have done some of it and witnessed all of it due to my decade of living the start-up life.
<img width="100%" style="width:100%" src="https://i.giphy.com/media/v1.Y2lkPTc5MGI3NjExM21xOGh3dTRlZDJ5NmIwY2IxNnVnc2UwMmZibHRtdnVhbDJ5eXdjcyZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/J93mYHWhTR3y1coX51/giphy.gif">
<u>**What I Plan to Post**</u>
On this platform, I plan to document my journey towards launching a web services business. We'll explore strategies to start a business in today's economy, identify alternative resources to keep costs down, and ultimately, turning those brilliant ideas into reality. I've seen firsthand how promoting features that aren't built can lead to failed projects – the dreaded vaporware. To avoid that fate, I need to build demos of the digital products I plan to sell. Today, I will start by creating a development environment on my home network...
Here are my Goals for today:
1. <u>**Build a Next.js Demo**</u> - Why? It is the ideal framework (e.g., SEO-friendliness, server-side rendering, and general ease of building frontend interfaces) for landing pages and marketing websites. This is the first market I plan to target.
2. <u>**Setup Minikube**</u> - Why? need a reliable environment to test these demos across various devices, something browser developer tools can't fully guarantee. Minikube will simulate a production environment for thorough testing.
3. <u>**Dockerize the Demo**</u> - Why? So I can deploy it to the cluster. Less obivious but more importantly, it creates a standardized and portable image for deployment (bonus: > dependency control) ready to deploy to Minikube.
4. <u>**Deploy the Container to Minikube**</u> - Why? It puts everything together. A successful deployment on Minikube will be a valuable learning experience, allowing me to replicate these steps for deployment on any cloud platform, even a private one, in the future!
Okay, lets get started... (its gonna a long one so buckle in!)
<u>**Building with Next.js**</u>
As I mentioned above, [the Next.js framework](nextjs.org), is the ideal framework for landing and marketing pages. While I think it holds true at the time of writing this post, I don't this will always be true. Also I don't think this is true for everyone. For those with Django experience, it is very likely creating a landing page or marketing site using the Django framework may be much easier than using Next.js. The same goes for anyone with experience with other languages or framework. Here are the reasons I chose to use Next.js as my first framework to create demo sites to show potential customers.
**The Documentation Fits My Eye and Mind** - [The showcases on their site](https://nextjs.org/showcase), the templates offered by their maintainers, [Vercel](https://vercel.com/templates/next.js), and the how their documentation reads allows me to get started quickly but deep into customization where and when I want it. The other framework documents give me the feeling that their maintainers expect me to get excited about reading before doing, or at least have the skills to manage the doing and the reading. If you have ever learned something new, this is a skill. At least for me, I just want to do and don't open the manual until I get stuck. I believe the Next documentation and examples follows that mentality.
> Above I picked on Django a bit but in reality it is because I like the python language and I have gone through the Django tutorial, a few times, and at the end of the tutorial I thought, "Now what?" Although I don't think it is a knock against the framework but rather it just doesn't fit my brain and if there is another option, I am going to try that (of which I have tried several).
<img width="100%" style="width:100%" src="https://i.giphy.com/media/v1.Y2lkPTc5MGI3NjExOHMxNm5uaHJpMjF6Y3ozamoyYjN4ZTV1czBsODZlemhucGtkcjgzaSZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/149dGhy9MfwMX305Kf/giphy.gif">
**Javascript is the Language of the Web** - As much as I tried to avoid learning Javascript (mostly because of all the horror stories told by the Java Zealots, and almost every other fanboi out there), the truth is that if you are building a digital product for the web then chances are that you will NEED Javascript to make your product feel modern and interactive (especially client-side). It is the prevailing, dominant language for all things web development (don't worry fanbois, I totally plan on building demos in other frameworks).
**I have to Start Somewhere** - Frankly I am just tired of trying everything else and am deciding by popularity. Nextjs is the most popular React Framework, React is most popular *library for building interactive applications (sorry Preact, Vue, Angular, Svelte and others if anyone decides to leave it in the comments), and Javascript is the most popular for building web applications.
Ok so now you have the context(ALL OF IT), here is now I built a landing page using Next.js.
<u>**Prepping the Environment for Development**</u>
<img width="100%" style="width:100%" src="https://i.giphy.com/media/v1.Y2lkPTc5MGI3NjExemJxaWUyYnA0cDdyb2c1dXZxYmhyMWxnc2l1MHczNmxtaTd1bXBzNSZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/U6pbfvyWU1iDKSklgU/giphy.gif">
1. Install NVM, NPM, Node, and NextJS - this is what I needed to manage the versions of node, install the nextjs framework, and manage any dependencies I may accumulate while building the landing site demo. Although some may think some of this is an optional step, I don't really share that opinion. All enterprise software shops version control the crap out of any and all artifacts. Why? Simply put: you don't work on enterprise product alone, and likely not even the same method. As a career quality assurance guy, this is best practice. If you find yourself or a co-worker sharing source code over an email, a dm on chat, etc. be very worried as this is always short-sighted. It is only a matter of time before that code implodes in production and when you have no way to roll the version back (because you have no version control) well let's just say it will be a late night for you as you rewrite the application, or worse, uncover what caused the implosion and attempt to pull that piece of code out. So just add version control at the start. This is what I am doing here. I am an engineer (or as I like to say, an aspiring engineer) and engineers build with failure in mind. If you are not, you aren't an engineer, you are a developer, a writer, dooming your product to fail terribly in the hands of your clients and having no way to quickly reconcile it#HotTake
<u>**Side Note**</u>
I am not going to make this tutorial about getting a node development environment up and running. This is document of my journey. I know how to install nvm, npm, node, and NextJS. If you are looking for a decent guide, I quickly curated a few:
NVM
----
a. [NVM Git](https://github.com/nvm-sh/nvm?tab=readme-ov-file#installing-and-updating)
b. [freeCodeCamp](https://www.freecodecamp.org/news/node-version-manager-nvm-install-guide/)
c. [Node's site (as if you needed any other proof that this is a best practice)](https://nodejs.org/en/download/package-manager)
**BONUS**
[A list of useful nvm commands](https://gist.github.com/chranderson/b0a02781c232f170db634b40c97ff455)
Node
----
(see section c under NVM)
NPM
----
a. [NPM Site](https://docs.npmjs.com/downloading-and-installing-node-js-and-npm)
b. [NPM Git](https://github.com/npm/cli)
Here is picture of my terminal, which might date me a bit. If you can tell what I am using and think I should use something different, let me know in the comments. I am not always the best but I want to be better: for me and for others.
There isn't much to ramble on about installing NextJS. To me the hardest part is past you at this point. [You can go here to get started](https://nextjs.org/docs/getting-started/installation). Actually there is one minor step here: You should probably think about where you are planning to host this code. For me, I created a directory called 'develop' in my 'home' directory. This is mostly arbitrary really. Its your local environment. Some of you may have this already running in VM, a container, nixOS, or use an IDE. For me, the terminal is my environment. It is because it is where I am most comfortable on the computer. I have been using terminals since the Commadore64, and when I thought being a network engineer was my career path, I dug into using shell. Old habits die hard ya know!
As you can tell this is not exactly the same as what the document says and that is okay. For me I know to expect this and you should too. Whenever relying on a static document to show you how to use an ever-evolving software application, it will come to pass that the document has become stale. If that gives anxiety, just remember the words of the brillant Donna Haraway and, "... lean into the trouble, " it is what makes us human. The final part of this section is that I just accept the defaults. I am doing this because this is a 'green field' build and from my experience deviating from the defaults means a few things:
a. You already know what you want and the defaults ain't it
b. Your team lead knows what you need and the defaults ain't it
c. You are experimenting with the framework but are confident in your react, express, node, and/or js skills.
d. None of these, the catch all because this list is already too long.
**BONUS**
Notice in the image above that there are warnings, usually this is ok and can be ignored usually. In my experiences as a QA resource, I would not like this and I would put a ticket on the board. Those tickets usually ended up in the backlog and were not touched until it caused an outage in production. This is where speed and quality just don't mix but guess what I am not wearing my QA hat just yet and just as a developers do sometimes, I am going to ignore them until they become a problem (either in my testing or post-deployment). Hopefully I don't eat my words here.
3. Change into the project's directory, run npm run dev, Delete the Boilerplate, and move some files around - Now that the local development environment is installed, I can change directories (cd for *nix users) and run `npm run dev`.
Now I delete.
I mean delete the html. I learned a long time ago that this is right move. If you are concerned about deleting code, you may want to reconsider your desire to be developing software. Revel in deleting code. Your boss will love you. Just make sure it works afterward.
Next we make some directories for our styles and components because as your scripts and styles grow, it gets challenging to keep it all in your head. Also this is just best current practice and component-based development is the current standard in react-derived frameworks.
Next I made a styles directory and move globals.css into the new directory.
You should get an error but that can easily resolved by updating the globals.css import in the layout.tsx file.
Now we can get into the fun part: writing some html, css, and js to build the demo landing page... well almost. We probably do a simple wireframe for this demo. Design, even if you have a designer on the team, is a great practice to get into. In my case I believe the wireframes will be an excellent way to interact with clients, even if it is to send pre-made mocks via email.
Here is what I think these are the basic components of a landing page.
Now I have designed the basic components. Don't worry I can add more as needed because its software. The barrier to create, update, and delete (most of CRUD) is much lower than say if I were building a house. With that said as an aspiring engineer I always attempt to build something I can repeat and easily maintain in the case it needs an update or removal.
Here are my basic components
-----------------------------
1. Header - where the navigation bar and navigation options will be
2. Body - where the content (e.g. the hero section, the about section, contact section, and so on) will go and selections from the nav will route too
3. Footer - where I can put social media links, copyright info, etc.
Now I can start writing...
1. I am going to start at the top with the Header.
2. In my components directory, I use touch to create header.tsx
3. VIM-ing into the header.tsx, I write some html and some css with [tailwindcss](https://tailwindcss.com/). I also added my new header component to the layouts.tsx file also.
4. Now just repeat that process for the footer component. But before we do, the styles in the globals.css file is starting to bother me. Has it started bothering you yet? Well, it is no problem.
Just delete most of the boiling plate... again. This time it is in the globals.css file.
Now lets rinse and repeat that footer component. Then add it to the layout.tsx
5. Time to stamp out some content. For this demo, I am adding a few content sections that I believe every landing/marketing page should have:
a. Hero - The attention elevator pitch for why the business has value.
b. Service - The section that provides an elevator pitch for each service the business provides
c. About - Where the business tells potential clients why. Why the owner started the business. Why current clients like their services. Why potential clients should pick this business
d. Contact - A call to action. The business needs close the deal here.
Now that the basics of the landing page demo is marked up and running. Let's switch gears to infrastructure.
<u>**Dockerizing the Demo**</u>
Originally I thought that I could write this but I couldn't. Instead I used the example from [the vercel repo](https://github.com/vercel/next.js/tree/canary/examples/with-docker). It worked. There were some warnings, I will eventually address, but for now I have a working container. It was also too easy.
<u>**Deploying to Minikube**</u>
Well I thought I could just do this without much guidance. I figured I would set up minikube the way I wanted and just be awesome... and I was totally wrong. I worked on this with just the kubernetes, nextjs, and docker documentation for a couple of nights. It was a challenge. A challenge that I decided was for someone else, maybe even a past version of me, but now. This ain't it Chief!
I ended up following [this post](https://tariqul-islam-rony.medium.com/next-js-with-minikube-kubernetes-5d9556365ac1) it worked like a charm. Well mostly worked at a charm. I am still having issues with exposing the container to my LAN. I could get to it locally but not from another device on the network. I triple checked my values in etc/hosts and yaml files. What was I going to do? Well honestly I think I need to end this post. It is so so so long.
<u>**Final Thoughts**</u>
Well as it turns out, it costs like $48 per month for Digital Ocean to manage a public-facing Kubernetes Cluster. One idea can't be that expensive and so I am going back to the drawing board. I have a droplet running my static pages and my mind is telling me I can deploy the nextjs app as a systemd service and configure the nginx service to expose it as a *.declared.space (thinking it will be something like nextjs.declared.space or something like that).
<u>**Cary On**</u>
I would be lying if I said I am happy with how this post is ending but I know this isn't the end. Despite my disappointment I know I am going to keep trying. At the beginning of this post I was confidence (and maybe a bit unreasonably so) that I was going to be ending this with announcing that I got my client but that isn't what happened. With that said I now see that part of my story to tell is one of trial and error. My story to share [here](https://dev.to) is the reality for most aspiring software developers that try to do what I am trying to do. Where I think most post only their success, I am here to share it all. I am here to embody the code in public mentality. This is how I learn: believing I am capable of more than what I am doing today, constantly reaching, constantly falling short of perfection, but never giving up. I will be back with another post about this. This forever series of climbing. As the wonderful artist, Thundercat, sings on their song, The Climb:
> Every time that I turn around, something trips me up
Soon as I feel I got a grip, shit starts to slip
When everybody wonders where I've been through all of this
All that I'm reminded of is that I just can't quit
It's for sure and up to fight, and downhill you fall
If you're gonna get scarred up anyway, then you might as well climb
<u>**Justification and Invitation**</u>
I went back and forth on whether or not I should break this up. All the LLMs I collab'ed with encouraged I should but I wanted to pour it all out there for this one. I am an emotional being. I am told by some that it is a blessing and a gift, but with every gift there is a cost. Please sub my profile (or whatever it is for this platform) to get notified when I post again. I know it will be better organized. Next up, setting up this app as a systemd service and exposing to the public webs via NGINX. I am also on Medium (although their platform is a bit annoying). I am posting on these platform to get used to blogging with the intention to eventually house this content on a server I maintain because that is all the internet really is: content on someone's computer. Oh yeah also check out my personal page [here](https://david.declared.space). | statueofdavid |
1,910,431 | AWS/GCP/Azure Consoles, Embedded inside Your Docs | Today, the team is thrilled to release Runme v3.6, a significant milestone integrating the remaining... | 0 | 2024-07-03T16:38:54 | https://dev.to/sourishkrout/awsgcpazure-consoles-embedded-inside-your-docs-1a3l | devops, cloud, aws, gcp | Today, the team is thrilled to release Runme v3.6, a significant milestone integrating the remaining crucial layer of DevOps and Infrastructure Operations. With Runme v3.6, you now have direct access to AWS/GCP/Azure Cloud Consoles inside your Markdown docs.
<div className="flex justify-center items-center h-full mt-4">
<img src="https://media.graphassets.com/51Gh224XTim27qtiiRpC" alt="Yo! Cloud Consoles in Your Docs"/>
</div>
<div className="flex justify-center items-center mt-2">If you don't know Xzibit's TV show and the meme, watch this <a href="https://www.youtube.com/watch?v=eeVZQNw5KRU">video</a> (totally worth it)</div>
<ExtensionCTA label="Install Runme" extension="runme" />
Yes, you read that right. Instead of having to log into your respective Public Cloud’s walled garden and find the resources you’re looking for, you can now make the Console UIs come to you whether you’re documenting an overview or specific VMs, NICs, VPCs, Services, or Clusters, you just “deep-link” the resource in your docs, which will render widgets for the Cloud resources fresh at the time of reading. You can even launch into everyday troubleshooting actions such as SSH sessions, start/stop VMs, pull up associated logs, or skim deployment manifests.
<video className="rounded-md border-solid border-2" autoPlay loop muted playsInline controls>
<source src="https://media.graphassets.com/uUCZU1tfQNi3D7hWHv8j" type="video/mp4" />
<source src="https://media.graphassets.com/ptBuodg8QbKXqzho9079" type="video/webm" />
</video>
> No need to log into AWS or GCP consoles: interactive cloud resources directly in your docs
## Best of ClickOps Without Downsides
The vertical integration of the terminal, editor, and browser with remote-hosted cloud resources makes Runme a perfect fit for documenting and operating your DevOps workflows through its intuitive notebook, editor, and command-line interfaces—all without the additional cost of running separate infrastructure and maintenance. Runme runs entirely locally; servers are optional. And, of course, it’s 100% compatible with your Infra As Code and GitOps.
## How It Works
The idea is as simple as it is powerful. Go ahead and drop the cloud console’s URL/URI to a resource into a cell, click ▶️ and that’s it.
<video className="rounded-md border-solid border-2" autoPlay loop muted playsInline controls>
<source src="https://media.graphassets.com/PlpRaC7KTe6KOzKWflIy" type="video/mp4" />
<source src="https://media.graphassets.com/Z17Sr2BNTDqCEr0bp8Je" type="video/webm" />
</video>
> Drop a cloud resource’s URI/URL into a cell to render an interactive widget
Runme’s Cloud-Native Bash Kernel runs cells containing Shell, Javascript, Python, Lua, PHP, etc., anything you could traditionally run via a shebang (e.g., `#!/usr/bin/ruby`). However, what makes Runme specifically “Cloud-Native” is the capability to allow the deep-linking and real-time rendering of resources in AWS, GCP, Azure, etc., as interactive widgets inside your docs.
<ExtensionCTA label="Install Runme" extension="runme" />
These notebook cell-based widgets are W3C-standard [Web Components](https://developer.mozilla.org/en-US/docs/Web/API/Web_components), which make them reusable, extensible, and highly interactive, just like any web app. The resource’s information in the widget is never stale. At the minimum, it’s fresh from when the cell last ran, and where it makes sense, it even updates in real time.
> Cloud resources widgets are built using Web Components (open W3C standard)
Access control to your Cloud accounts is entirely enforced by the respective Public Cloud’s officially published SDK. If you’re already using, let’s say, the AWS or GCP’s CLIs, you have no additional setup to get going.
## Navigating Cloud Resources in Docs
Of course, cloud deployments aren’t just a single resource. Instead, they are a cobweb of interlinked resources: VMs, NICs, VPCs, LBs, images, containers, pods, etc. Moreover, most resources provide heaps of metadata, operations one can perform (start, stop, login, backup, etc), and event and time-series logs. In the general UX, we strive to find a pragmatic balance between linking back to the Cloud Console and providing first-class UX support. This is a work in progress, and we’re looking for feedback.
There are three general types of cloud resource widget interactions.
### Expanding of Listings
What’s excellent about rendering widgets for your cloud resources is that you can highly contextualize your docs. When you provide a listing of e.g. clusters or VMs, traversing into details is a single click away if they are e.g. part of a task or workflow description.
<video className="rounded-md border-solid border-2" autoPlay loop muted playsInline controls>
<source src="https://media.graphassets.com/8ACxXbblQrmADyQmdRtj" type="video/mp4" />
<source src="https://media.graphassets.com/EB2KI6BiQUa8ViJ1kiFN" type="video/webm" />
</video>
> Add the detail view of a cluster with a single click
### Follow-up Actions on Resources
Wherever it makes sense, the widgets will provide follow-up actions. Those are super handy for opening associated event logs and metrics, SSH-ing into machines, or starting/stopping VMS. The widgets largely mimic what’s available in the respective cloud console. Let us know if any resource is missing a desired action.
<video className="rounded-md border-solid border-2" autoPlay loop muted playsInline controls>
<source src="https://media.graphassets.com/KJeZD27CRe2mcwJqHQVd" type="video/mp4" />
<source src="https://media.graphassets.com/39r4xIhJTYiBBRzBty5g" type="video/webm" />
</video>
> Easily navigate the cloud's cobweb of resources and associated actions
### Zooming in and Out of Details
Not every follow-up action expands into a new cell. Wherever it makes sense, it’s possible to navigate back and forth between listings/overviews and their details. Web Components allow for web app-like behavior, including routing between views.
<video className="rounded-md border-solid border-2" autoPlay loop muted playsInline controls>
<source src="https://media.graphassets.com/YOsM88KmSui6u5JbJ2fr" type="video/mp4" />
<source src="https://media.graphassets.com/8mZ7vyviTSe5FzGPi3rk" type="video/webm" />
</video>
> Intuitively flip back and forth between overview and details
### Interpolation & Variables for Generic Docs
While it’s powerful to deep-link concrete resources, sometimes you do want to distribute generic and parametrized docs. The cloud resource widgets transparently handle environment variables. Let’s say you wanted to generically list all VMs inside GCE in whatever project is currently set for your `gcloud` CLI. Just use a shell expression to do that:
```bash
https://console.cloud.google.com/compute/instances?project=$(gcloud config get project)
```
Needless to say, you can use variables set in previous cells in your ENV here for AWS EC2:
```bash
https://$AWS_REGION.console.aws.amazon.com/ec2/home?region=$AWS_REGION#InstanceDetails:instanceId=$EC2_INSTANCE_ID
```
That’s all you need to know to get started. However, we put together an end-to-end example to illustrate the power of runnable docs built with Markdown.
<ExtensionCTA label="Install Runme" extension="runme" />
## Example Workflow Docs with Runme & Terramate
Our friends at [Terramate](https://terramate.io) have built a suite of tools to enable operating OpenTofu & Terraform IaCs at scale. We wanted to use the opportunity to showcase how IaC and DevOps notebooks perfectly combine to provide robust workflow documentation. The example repository, located at [stateful/runme-terramate-example](https://github.com/stateful/runme-terramate-example), is super easy to run yourself. Just follow the instructions running the `README.md`. Here’s a quick video to illustrate how it works:
<div>
<iframe
className="mx-auto rounded-lg shadow-2xl select-none"
width="100%"
height="500"
src="https://www.youtube.com/embed/Q5Hw5L3lUX0"
title="YouTube video player"
frameBorder="0"
allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
allowFullScreen
></iframe>
</div>
> Unleash workflows with runnable & interactive documentation built with Markdown: [https://github.com/stateful/runme-terramate-example](https://github.com/stateful/runme-terramate-example)
## Try It Now – Feedback Welcome
While “Cloud Resources” could conceivably be anything from a Kubernetes cluster, a Vercel site, a Netlify deploy, a [GitHub Actions workflow](https://docs.runme.dev/integrations/embed-github-action), a Supabase database, or anything running in OpenStack, we wanted to start with the most popular public cloud use cases. However, please don’t hesitate to let us know what your Cloud/DevOps heart desires.
Today’s release comes with beta support for a sub-selection of AWS & GCP cloud resources. Namely EC2 and EKS for AWS and GCE, GKE, and Cloud Run for GCP. We’re working on adding experimental Azure support right now. Needless to say, there is a lot of ground to cover, and existing renderers still need details to be fleshed out and overall polished. However, we wanted your feedback early, so we decided to release it now. Runme’s canonical examples are a good way to keep an eye on coverage as we continue unlocking better renderers. Please [read the docs](https://docs.runme.dev/integrations/cloud-render/) and check out:
- AWS: [https://github.com/stateful/vscode-runme/tree/main/examples/aws](https://github.com/stateful/vscode-runme/tree/main/examples/aws)
- GCP: [https://github.com/stateful/vscode-runme/tree/main/examples/gcp](https://github.com/stateful/vscode-runme/tree/main/examples/gcp)
<ExtensionCTA label="Install Runme" extension="runme" />
Before you go, please give [**Runme a ⭐️ Star**](https://github.com/stateful/runme/stargazers) on GitHub and join [Runme's Discord](https://discord.gg/runme) to let the Runme team know what you think. Thank you! | sourishkrout |
1,910,432 | How to use CSS in Media Queries with styled components in React js | Step 1: Install Styled Components First, make sure you have styled-components installed in your... | 0 | 2024-07-03T16:37:55 | https://dev.to/sudhanshu_developer/styling-react-using-css-6-methods-4oi6 | webcomponents, css, programming, react | **Step 1: Install Styled Components**
First, make sure you have `styled-components` installed in your project. If not, you can install it using npm or yarn:
```
npm install styled-components
```
**Step 2: Create a Styled Component with Media Queries**
You can create a styled component and use media queries within it. Here’s an example of a responsive Container component that changes its background color based on the screen width:
```
import React from 'react';
import styled from 'styled-components';
// Define the styled component with media queries
const Container = styled.div`
width: 100%;
height: 100vh;
background-color: lightblue;
@media (max-width: 768px) {
background-color: lightcoral;
}
@media (max-width: 480px) {
background-color: lightgreen;
}
`;
const App = () => {
return (
<Container>
<h1>Hello, World!</h1>
</Container>
);
};
export default App;
```
**Explanation**
**Import Styled Components:** Import the styled object from `styled-components`.
**Create a Styled Component:** Define a styled Container component. The Container will have a default background color of lightblue.
**Add Media Queries:**
For screens with a maximum width of 768px, change the background color to lightcoral.
For screens with a maximum width of 480px, change the background color to lightgreen.
**Use the Styled Component:** Use the Container component in your App component. Any content inside the Container will have the styles applied to it, including the media queries.
**Step 3: Render the App**
When you run your React application, you should see the Container change its background color based on the screen width:
**Default: lightblue**
`Max-width 768px: lightcoral
Max-width 480px: lightgreen`
This way, you can easily add responsive styles to your React components using CSS Media Queries with Styled Components.
**Additional Tips**
You can add more complex styles and media queries as needed.
Combining media queries with other styled-component features (e.g., themes) can make your styles even more powerful and maintainable.
| sudhanshu_developer |
1,910,428 | # 🌳 Dive into Decision Trees: A Fun Guide! 🌳 | Hey there, fellow data enthusiasts! 👋 Are you ready to dive into the world of Decision Trees? 🌲 Let's... | 0 | 2024-07-03T16:35:51 | https://dev.to/aviralgarg05/-dive-into-decision-trees-a-fun-guide-9ac | ai, python, tensorflow, machinelearning | Hey there, fellow data enthusiasts! 👋 Are you ready to dive into the world of Decision Trees? 🌲 Let's make it interactive and fun with emojis! 🎉
## What is a Decision Tree? 🤔
A Decision Tree is like a flowchart that helps us make decisions based on data. Each node represents a decision point, and the branches show the possible outcomes. It's a powerful tool in the world of Machine Learning! 🚀
## Why Use Decision Trees? 🤷♂️
1. **Simplicity**: Easy to understand and interpret. 🧠
2. **Versatility**: Can handle both numerical and categorical data. 🔢🔤
3. **No Need for Data Normalization**: Works well with raw data. 🌟
4. **Feature Importance**: Helps identify the most important features. 🔍
## How Does It Work? 🛠️
1. **Start at the Root**: Begin with the entire dataset. 🌱
2. **Split the Data**: Based on a feature, split the data into branches. 🌿
3. **Repeat**: Continue splitting until each leaf (end node) contains a single class or meets stopping criteria. 🍂
### Example Time! 📝
Imagine we have data about fruits, and we want to classify them based on features like color, size, and shape. 🍎🍌🍊
1. **Root Node**: Is the fruit color red?
- Yes: 🍎
- No: Go to next question.
2. **Next Node**: Is the fruit shape long?
- Yes: 🍌
- No: 🍊
And voila! We have our decision tree! 🌳
## Pros and Cons 🆚
### Pros 👍
- **Easy to Understand**: Visual representation makes it intuitive.
- **No Data Scaling Needed**: Works with raw data.
- **Handles Both Types of Data**: Numerical and categorical.
### Cons 👎
- **Overfitting**: Can create overly complex trees.
- **Sensitive to Data Variations**: Small changes can alter the tree.
- **Less Accurate**: Compared to ensemble methods.
## Visualizing Decision Trees 👀
Visualizations make it easier to interpret decision trees. Tools like Graphviz and libraries like Scikit-learn in Python can help create these visualizations. 🖼️
```python
from sklearn import tree
import matplotlib.pyplot as plt
# Example Code to Visualize a Decision Tree
model = tree.DecisionTreeClassifier()
model.fit(X_train, y_train)
plt.figure(figsize=(12,8))
tree.plot_tree(model, filled=True)
plt.show()
```
## Let's Play! 🎮
Ready to try out Decision Trees? Here's a challenge for you:
- **Dataset**: Use the Iris dataset (a classic in ML).
- **Goal**: Classify the species of Iris flowers based on sepal/petal length and width.
Share your results in the comments below! 💬
## Conclusion 🎬
Decision Trees are a fantastic starting point in the world of Machine Learning. They're simple yet powerful and can handle a variety of data types. So, go ahead and plant your Decision Tree today! 🌳🌟
Happy coding! 💻✨
| aviralgarg05 |
1,910,423 | Linux User Creation Bash Script | Hey guys, been a while since my last article on Network Programming Series. While I'll very much... | 0 | 2024-07-03T16:32:47 | https://dev.to/jothamntekim1/linux-user-creation-bash-script-509a | bash, devops, beginners | Hey guys, been a while since my last article on Network Programming Series. While I'll very much start writing soon and continue the next article on the series, let me quickly walk you through how I did my HNG stage 1 task.
[HNG](https://hng.tech/) is a set of program designed for intermediate to advanced learners who want to rapidly move forward in their career - and end up in jobs in the best international companies. To achieve their mission of enhancing the skills of developers and make them Job ready, they arranged a 2-month transformative internship, widely known as [HNG INTERNSHIP](https://hng.tech/internship).
As part of the custom, we're to complete a task every week to move up the stages and I guess this is me about to walk you through how I did my Stage 1 task.
## Task Description
Your company has employed many new developers. As a SysOps engineer, write a bash script called create_users.sh that reads a text file containing the employee’s usernames and group names, where each line is formatted as user;groups.
The script should create users and groups as specified, set up home directories with appropriate permissions and ownership, generate random passwords for the users, and log all actions to /var/log/user_management.log. Additionally, store the generated passwords securely in /var/secure/user_passwords.txt.
## Requirements
- Each User must have a personal group with the same group name as the username, this group name will not be written in the text file.
- A user can have multiple groups, each group delimited by comma ","
- Usernames and user groups are separated by semicolon ";"- Ignore whitespace e.g. light; sudo,dev,www-data idimma; sudo mayowa; dev,www-data
- For the first line, light is username and groups are sudo, dev, www-data
## My Solution
```
//create_users.sh file
#!/bin/bash //add this to the top of the file to indicate how it should be interpreted
# Check if the user list file is provided as an argument
if [ $# -ne 1 ]; then
echo "Usage: $0 <user_list_file>"
exit 1
fi
# Define the user list file from the argument
USER_FILE="$1"
# Check if the user list file exists
if [ ! -f "$USER_FILE" ]; then
echo "User list file $USER_FILE not found!"
exit 1
fi
LOG_FILE="/var/log/user_management.log"
PASSWORD_FILE="/var/secure/user_passwords.txt"
# Ensure the log and password files exist
sudo touch $LOG_FILE
sudo chmod 666 $LOG_FILE
mkdir -p /var/secure
sudo touch $PASSWORD_FILE
sudo chmod 666 $PASSWORD_FILE
# Function to generate a random password
generate_password() {
< /dev/urandom tr -dc 'A-Za-z0-9!@#$%^&*()_+=' | head -c 12
}
# Read the user file
while IFS=';' read -r username groups || [ -n "$username" ]; do
if id "$username" &>/dev/null; then
echo "User $username already exists." | tee -a $LOG_FILE
else
# Create the user with a home directory
sudo useradd -m -s /bin/bash "$username"
echo "Created user $username." | tee -a $LOG_FILE
# Generate and set a random password
password=$(generate_password)
echo "$username:$password" | sudo chpasswd
echo "$username:$password" >> $PASSWORD_FILE
echo "Password for user $username set." | tee -a $LOG_FILE
# Set ownership and permissions for the home directory
sudo chown "$username:$username" /home/$username
sudo chmod 700 /home/$username
echo "Home directory permissions set for $username." | tee -a $LOG_FILE
# Handle groups
IFS=',' read -ra group_list <<< "$groups"
for group in "${group_list[@]}"; do
if getent group "$group" &>/dev/null; then
echo "Group $group already exists." | sudo tee -a $LOG_FILE
else
sudo groupadd "$group"
echo "Created group $group." | tee -a $LOG_FILE
fi
sudo usermod -aG "$group" "$username"
echo "Added user $username to group $group." | sudo tee -a $LOG_FILE
done
fi
done < "$USER_FILE"
```
**Here's what each line does...**
```
#!/bin/bash
```
- This is the shebang line that tells the system to use the Bash interpreter to execute this script.
```
if [ $# -ne 1 ]; then
echo "Usage: $0 <user_list_file>"
exit 1
fi
```
- This section checks if exactly one argument (the user list file) is provided when the script is run. If not, it prints a usage message and exits with an error code.
```
USER_FILE="$1"
```
- This line assigns the provided argument to the USER_FILE variable, which will be used to refer to the user list file throughout the script.
```
if [ ! -f "$USER_FILE" ]; then
echo "User list file $USER_FILE not found!"
exit 1
fi
```
- This section checks if the specified user list file exists. If not, it prints an error message and exits.
```
LOG_FILE="/var/log/user_management.log"
PASSWORD_FILE="/var/secure/user_passwords.txt"
sudo touch $LOG_FILE
sudo chmod 777 $LOG_FILE
mkdir -p /var/secure
sudo touch $PASSWORD_FILE
sudo chmod 777 $PASSWORD_FILE
```
- These lines define the paths for the log file and the password file and then create the log and password files if they do not already exist and set their permissions to be writable by any users.
```
generate_password() {
< /dev/urandom tr -dc 'A-Za-z0-9!@#$%^&*()_+=' | head -c 12
}
```
- This function generates a random 12-character password using characters from a specified set. It reads from /dev/urandom, which is a pseudo-random number generator.
```
while IFS=';' read -r username groups || [ -n "$username" ]; do
```
- This line starts a while loop that reads each line from the user list file. The IFS=';' sets the internal field separator to ;, so the line is split into username and groups. The || [ -n "$username" ] part ensures the last line is processed even if it doesn't end with a newline character.
```
if id "$username" &>/dev/null; then
echo "User $username already exists." | tee -a $LOG_FILE
else
```
- This block checks if the user already exists using the id command. If the user exists, it logs a message to the log file and continues to the next iteration.
```
sudo useradd -m -s /bin/bash "$username"
echo "Created user $username." | tee -a $LOG_FILE
```
- If the user does not exist, this block creates the user with a home directory and sets the default shell to Bash. It then logs the action.
```
password=$(generate_password)
echo "$username:$password" | sudo chpasswd
echo "$username:$password" >> $PASSWORD_FILE
echo "Password for user $username set." | sudo tee -a $LOG_FILE
```
- This section generates a random password using the generate_password function, sets the user's password, and logs the password in the password file and the action in the log file.
```
sudo chown "$username:$username" /home/$username
sudo chmod 700 /home/$username
echo "Home directory permissions set for $username." | sudo tee -a $LOG_FILE
```
- This block sets the ownership of the user's home directory to the user and sets the permissions to 700 (read, write, and execute only by the owner). It then logs the action.
```
IFS=',' read -ra group_list <<< "$groups"
for group in "${group_list[@]}"; do
if getent group "$group" &>/dev/null; then
echo "Group $group already exists." | sudo tee -a $LOG_FILE
else
sudo groupadd "$group"
echo "Created group $group." | sudo tee -a $LOG_FILE
fi
sudo usermod -aG "$group" "$username"
echo "Added user $username to group $group." | sudo tee -a $LOG_FILE
done
fi
done < "$USER_FILE"
```
- This section handles group assignments for the user. It splits the groups field into an array using , as a separator and iterates over each group. For each group, it checks if the group exists; if not, it creates the group. Then, it adds the user to the group and logs the actions.
So that's it. I want to point out though that the internship is a great opportunity to both learn and network, and interestingly, even if you couldn't finish, you can remain connected to their community and enjoy the same benefits as the finalists if you upgrade your account to premium. Check out their Premium benefits [here](https://hng.tech/premium)
I'll keep you posted on my next article. | jothamntekim1 |
1,910,426 | 🚀 Top 5 DevOps Tools to Supercharge Your Workflow in 2024! | In the rapidly evolving world of DevOps, staying ahead with the right tools is crucial for efficiency... | 0 | 2024-07-03T16:32:11 | https://dev.to/wallacefreitas/top-5-devops-tools-to-supercharge-your-workflow-in-2024-4851 | devops, terraform, kubernetes, docker | In the rapidly evolving world of DevOps, staying ahead with the right tools is crucial for efficiency and productivity. As we step into 2024, here are the top 5 DevOps tools you should definitely have in your toolkit:
**Docker** 🐳
Why Use It: Simplifies containerization, enabling seamless deployment across different environments.
Key Features: Lightweight containers, easy integration with CI/CD pipelines, and a vast library of pre-built images.
**Kubernetes** ☸️
Why Use It: Manages containerized applications at scale, ensuring high availability and scalability.
Key Features: Automated deployment, scaling, and management of containerized applications.
**Jenkins** 🤖
Why Use It: Automates the CI/CD process, making it easier to integrate changes and deploy code quickly.
Key Features: Extensive plugin ecosystem, easy configuration, and robust pipeline as code support.
**Terraform** 🌍
Why Use It: Facilitates infrastructure as code, allowing you to provision and manage infrastructure efficiently.
Key Features: Declarative configuration files, supports multiple cloud providers, and ensures reproducibility.
**Prometheus** 📊
Why Use It: Powerful monitoring and alerting toolkit designed for reliability and scalability.
Key Features: Flexible querying, robust time-series data storage, and seamless integration with Grafana for visualization.
These tools are game-changers for DevOps engineers, helping to streamline workflows, enhance collaboration, and maintain high standards of performance and security. Embrace these technologies in 2024 to take your DevOps practices to the next level! | wallacefreitas |
1,910,424 | Développement Front end Modern : Une Analyse Comparative d'Angular et React | Introduction Le paysage du développement frontend est en constante mutation, avec l'arrivée... | 0 | 2024-07-03T16:29:59 | https://dev.to/bienvenudk57/developpement-front-end-modern-une-analyse-comparative-dangular-et-react-4ej | **Introduction**
Le paysage du développement frontend est en constante mutation, avec l'arrivée incessante de nouvelles technologies qui repoussent les limites de ce qui est réalisable. Parmi ces technologies, deux titans se distinguent : Angular et React. Chacun possède ses propres forces et faiblesses, attirant développeurs et entreprises dans son orbite. Mais lequel est le choix ultime pour votre prochain projet ? Plongeons dans une analyse comparative approfondie, agrémentée d'exemples de code clairs et concis, pour découvrir le champion qui saura conquérir votre cœur de développeur.
## Angular : Le Géant Structuré
Angular, issu des entrailles de Google, se présente comme un framework JavaScript complet et structuré, reposant sur une approche basée sur les composants et une architecture MVC (Model-View-Controller) robuste. Cette structure rigoureuse et sa documentation riche en font un choix privilégié pour les applications web complexes et d'envergure.
**React : Le Prodige Agile**
Sorti des ateliers de Facebook, React se présente comme une bibliothèque JavaScript légère et flexible, favorisant une approche déclarative et basée sur les composants. Sa syntaxe simple, sa courbe d'apprentissage accessible et sa communauté dynamique en font un choix attrayant pour les développeurs débutants et expérimentés.
## Le Choix Ultime : Un Combat de Poids Lourds
**1. Structure et Organisation**
Angular : Structure MVC claire, directives strictes pour organiser les composants et le flux de données.
React : Approche plus flexible, basée sur des composants autonomes, peut manquer de structure claire dans les projets de grande envergure.
**Création d'un composant bouton avec Angular**
```JavaScript
// Angular
@Component({
selector: 'app-button',
templateUrl: './button.component.html',
styleUrls: ['./button.component.css']
})
export class ButtonComponent {
@Input() label: string = 'Button';
@Output() onClick = new EventEmitter<void>();
handleClick() {
this.onClick.emit();
}
}
```
**Création d'un composant bouton avec React**
```
JavaScript
// React
const Button = (props) => {
return (
<button onClick={props.onClick}>
{props.label}
</button>
);
};
```
**2. Performance**
Angular : Performance remarquable grâce à la compilation anticipée et à la virtualisation DOM.
React : Légèrement plus performant qu'Angular, grâce à sa gestion efficace des changements de données et à sa virtualisation DOM optimisée.
**Mise à jour d'une liste de données avec angular**
```
JavaScript
// Angular
@Component({
selector: 'app-data-list',
template: `
<ul>
<li *ngFor="let item of items">{{ item.name }}</li>
</ul>
`
})
export class DataListComponent {
items = [
{ name: 'Item 1' },
{ name: 'Item 2' },
{ name: 'Item 3' }
];
updateItems() {
this.items = [
{ name: 'Item 1 (Updated)' },
{ name: 'Item 2 (Updated)' },
{ name: 'Item 3 (Updated)' }
];
}
}
```
**Mise à jour d'une liste de données avec React**
```
JavaScript
// React
const DataList = () => {
const [items, setItems] = useState([
{ name: 'Item 1' },
{ name: 'Item 2' },
{ name: 'Item 3' }
]);
const updateItems = () => {
setItems([
{ name: 'Item 1 (Updated)' },
{ name: 'Item 2 (Updated)' },
{ name: 'Item 3 (Updated)' }
]);
};
return (
<ul>
{items.map(item => <li key={item.name}>{item.name}</li>)}
</ul>
);
};
```
**3. Apprentissage**
Angular : Courbe d'apprentissage plus abrupte en raison de sa complexité conceptuelle, de son architecture structurée et de sa syntaxe spécifique.
React : Plus accessible aux débutants grâce à sa syntaxe simple et intuitive, à son approche déclarative et à sa communauté acti
**4. Communauté et Support**
Angular : Communauté vaste et active, support officiel de Google, abondance de ressources et de bibliothèques tierces.
React : Communauté dynamique et en pleine croissance, support communautaire solide, large éventail de bibliothèques tierces.
## Conclusion
Le choix entre Angular et React dépend des besoins spécifiques de votre projet et de vos préférences en tant que développeur.
**Angular** s'impose comme un choix idéal pour les applications complexes nécessitant une structure claire, une performance optimale et un support officiel solide.
**React** quant à lui, brille par sa simplicité d'apprentissage, sa flexibilité et sa communauté dynamique, le rendant parfaitement adapté aux projets de petite et moyenne envergure ainsi qu'aux développeurs débutants.
N'oubliez pas que le meilleur framework est celui qui vous permet de créer des interfaces utilisateur époustouflantes et d'offrir une expérience utilisateur exceptionnelle. Alors, explorez, expérimentez et laissez-vous guider par votre passion pour le développement frontend !
**Choix stratégique :**
Applications complexes et d'envergure : Angular
Projets de petite et moyenne envergure : React
Développeurs débutants : React
Développeurs expérimentés: Angular ou React selon les préférences
**N'oubliez pas** : L'expérimentation est la clé ! Explorez les deux frameworks et choisissez celui qui vous convient le mieux.
Angular vs React : Le Duel des Titans du Développement Frontend Moderne (Version Détaillée avec Exemples de Code)
**Références**
** Livres**
**Angular**
- Angular - Développez vos applications web avec le framework JavaScript de Google (3e édition) par Daniel Djordjevic, William Klein, Sébastien Ollivier
- Apprenez AngularJS en 1 jour : guide complet d'Angular JS avec des exemples par Krishna Rungta
**React**
- React : Apprenez à construire des interfaces utilisateur interactives par Robin Wieruch
- Eloquent JavaScript: Eloquent JavaScript: A Modern Introduction to JavaScript 3rd Edition par Marijn Haverbeke
**Sites web**
**Angular**
https://angular.dev/
https://angular.io/cli/doc
**React**
https://legacy.reactjs.org/
https://legacy.reactjs.org/docs/getting-started.html
Je suis très enthousiaste à l'idée de commencer mon stage à la HNG et j'attends avec impatience d'acquérir de nouvelles connaissances et competence en programation qui me permetrons à me avancé dans la vie professionnel et en esperant avoir de contrat et de contrubution pour de grand traveau et dans les grande boite au niveau regional et international .
Pour de plus amples informations, veuillez consulter le site suivant:https://hng.tech/internship ou https://hng.tech/premium
afin que les autres puissent en savoir plus sur le programme.
| bienvenudk57 |
|
1,910,422 | 𝐓𝐡𝐞 𝐏𝐬𝐲𝐜𝐡𝐨𝐥𝐨𝐠𝐲 𝐨𝐟 𝐒𝐨𝐜𝐢𝐚𝐥 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠: 𝐇𝐨𝐰 𝐭𝐨 𝐏𝐫𝐨𝐭𝐞𝐜𝐭 𝐘𝐨𝐮𝐫𝐬𝐞𝐥𝐟 𝐚𝐧𝐝 𝐘𝐨𝐮𝐫 𝐃𝐚𝐭𝐚 | Social engineering remains one of the most effective methods of cyber attacks, often bypassing... | 0 | 2024-07-03T16:29:56 | https://dev.to/namik_ahmedov/-4joe | security, datasecurity | Social engineering remains one of the most effective methods of cyber attacks, often bypassing technical defenses through manipulation of the human factor. It's crucial to understand the methods used by malicious actors and steps you can take to defend against them.
🔍 𝐖𝐡𝐚𝐭 𝐢𝐬 𝐒𝐨𝐜𝐢𝐚𝐥 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠?
Social engineering is the process of manipulating people to gain access to confidential information or systems. Attackers employ various techniques such as phishing via email, social media scams, and fraudulent phone calls to deceive their victims.
💡 𝐇𝐨𝐰 𝐭𝐨 𝐏𝐫𝐨𝐭𝐞𝐜𝐭 𝐘𝐨𝐮𝐫𝐬𝐞𝐥𝐟?
• 𝐄𝐝𝐮𝐜𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐀𝐰𝐚𝐫𝐞𝐧𝐞𝐬𝐬: Conduct regular security training for employees to help them recognize signs of social engineering attacks.
• 𝐂𝐚𝐮𝐭𝐢𝐨𝐧 𝐢𝐧 𝐂𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬: Be vigilant of unexpected requests for information or financial transactions, especially if they come via email or social media.
• 𝐓𝐰𝐨-𝐅𝐚𝐜𝐭𝐨𝐫 𝐀𝐮𝐭𝐡𝐞𝐧𝐭𝐢𝐜𝐚𝐭𝐢𝐨𝐧: Use two-factor authentication to protect your accounts from unauthorized access.
🚀 𝐑𝐨𝐥𝐞 𝐨𝐟 𝐄𝐝𝐮𝐜𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐀𝐰𝐚𝐫𝐞𝐧𝐞𝐬𝐬
A key factor in combating social engineering is educating your staff. The more informed employees are, the lower the likelihood of successful attacks.
Protecting against social engineering requires a comprehensive approach that includes both technology and education. Let's work together to make our data and systems more secure! | namik_ahmedov |
1,910,421 | 1509. Minimum Difference Between Largest and Smallest Value in Three Moves | 1509. Minimum Difference Between Largest and Smallest Value in Three Moves Medium You are given an... | 27,523 | 2024-07-03T16:27:48 | https://dev.to/mdarifulhaque/1509-minimum-difference-between-largest-and-smallest-value-in-three-moves-19pk | php, leetcode, algorithms, programming | 1509\. Minimum Difference Between Largest and Smallest Value in Three Moves
Medium
You are given an integer array `nums`.
In one move, you can choose one element of `nums` and change it to **any value**.
Return _the minimum difference between the largest and smallest value of `nums` **after performing at most three moves**_.
**Example 1:**
- **Input:** nums = [5,3,2,4]
- **Output:** 0
- **Explanation:** We can make at most 3 moves.
```
In the first move, change 2 to 3. nums becomes [5,3,3,4].
In the second move, change 4 to 3. nums becomes [5,3,3,3].
In the third move, change 5 to 3. nums becomes [3,3,3,3].
After performing 3 moves, the difference between the minimum and maximum is 3 - 3 = 0.
```
**Example 2:**
- **Input:** nums = [1,5,0,10,14]
- **Output:** 1
- **Explanation:** We can make at most 3 moves.
```
In the first move, change 5 to 0. nums becomes [1,0,0,10,14].
In the second move, change 10 to 0. nums becomes [1,0,0,0,14].
In the third move, change 14 to 1. nums becomes [1,0,0,0,1].
After performing 3 moves, the difference between the minimum and maximum is 1 - 0 = 1.
It can be shown that there is no way to make the difference 0 in 3 moves.
```
**Example 3:**
- **Input:** nums = [3,100,20]
- **Output:** 0
- **Explanation:** We can make at most 3 moves.
```
In the first move, change 100 to 7. nums becomes [3,7,20].
In the second move, change 20 to 7. nums becomes [3,7,7].
In the third move, change 3 to 7. nums becomes [7,7,7].
After performing 3 moves, the difference between the minimum and maximum is 7 - 7 = 0.
```
**Constraints:**
- <code>1 <= nums.length <= 10<sup>5</sup></code>
- <code>-10<sup>9</sup> <= nums[i] <= 10<sup>9</sup></code>
**Solution:**
```
class Solution {
/**
* @param Integer[] $nums
* @return Integer
*/
function minDifference($nums) {
$n = count($nums);
// If the array has 4 or fewer elements, the difference is zero because we can remove all but one element.
if ($n <= 4) {
return 0;
}
// Sort the array to facilitate the calculation of differences after removals.
sort($nums);
// We consider removing 0, 1, 2, or 3 elements from the start or the end.
// Calculate the differences:
// 1. Remove 3 from start: nums[n-1] - nums[3]
// 2. Remove 2 from start, 1 from end: nums[n-2] - nums[2]
// 3. Remove 1 from start, 2 from end: nums[n-3] - nums[1]
// 4. Remove 3 from end: nums[n-4] - nums[0]
$differences = [
$nums[$n - 1] - $nums[3],
$nums[$n - 2] - $nums[2],
$nums[$n - 3] - $nums[1],
$nums[$n - 4] - $nums[0]
];
// Return the minimum difference.
return min($differences);
}
}
```
**Contact Links**
- **[LinkedIn](https://www.linkedin.com/in/arifulhaque/)**
- **[GitHub](https://github.com/mah-shamim)**
| mdarifulhaque |
1,910,420 | The Role and Benefits of Online Business in Today’s World | In our digital era, the business world has been transformed by the internet. Online business has... | 0 | 2024-07-03T16:26:05 | https://dev.to/stevemax237/the-role-and-benefits-of-online-business-in-todays-world-3d7g | In our digital era, the business world has been transformed by the internet. Online business has become a game-changer, reshaping traditional commerce and opening up new doors for entrepreneurs. Whether it’s a small startup or a large corporation, the allure of the online marketplace is undeniable. Let’s dive into the role of online business today, its many benefits, and some exciting [online business ideas](https://www.mobileappdaily.com/knowledge-hub/online-business-ideas?utm_source=dev&utm_medium=hc&utm_campaign=mad).
## The Role of Online Business Today
The internet has created a global marketplace where geographical boundaries are virtually non-existent. This means even the smallest businesses can reach a worldwide audience and compete on a global scale. Online businesses are now a crucial part of the economy, driving innovation, creating jobs, and significantly contributing to GDP.
The COVID-19 pandemic has pushed this trend even further. With physical stores closing and people staying home, the demand for online shopping, digital services, and remote work solutions has exploded. This shift has kept many businesses afloat during tough times and highlighted the importance of having an online presence.
## Benefits of Online Business
Global Reach: One of the biggest perks of online business is the ability to reach customers all over the world. Unlike traditional brick-and-mortar businesses, which are limited by their location, online businesses can attract a global audience. This wider reach can lead to more sales and growth opportunities.
Lower Overheads: Running an online business typically costs less than a physical store. There’s no need to pay for rent, utilities, or large staffing costs. This financial flexibility allows businesses to reinvest in other areas like marketing, product development, or customer service.
Flexibility and Convenience: Online businesses offer unmatched flexibility. Entrepreneurs can manage their operations from anywhere, often with just a laptop and an internet connection. This convenience extends to customers, who can shop or access services 24/7 from the comfort of their homes.
Data and Analytics: Online businesses have access to a treasure trove of data and analytics tools. These tools provide valuable insights into customer behavior, preferences, and trends. By using this data, businesses can make informed decisions, personalize their offerings, and improve customer satisfaction.
Scalability: Scaling an online business is generally easier than scaling a traditional business. With the right strategies and infrastructure, businesses can handle increased demand, expand their product lines, and enter new markets with relative ease.
## Online Business Ideas
E-commerce Store: Starting an online store is one of the most popular online business ideas. You can sell physical products, digital goods, or even dropship items from suppliers without holding inventory.
Digital Marketing Agency: With the growing importance of having an online presence, businesses are always in need of digital marketing services. Offering SEO, social media management, content creation, and PPC advertising can be very lucrative.
Online Courses and Coaching: Sharing your expertise through online courses or coaching sessions is a booming industry. Platforms like Udemy and Teachable make it easy to create and sell educational content.
Affiliate Marketing: This involves promoting other companies’ products and earning a commission for every sale made through your referral. It requires a good understanding of digital marketing and audience engagement.
Freelance Services: Offering your skills such as writing, graphic design, web development, or virtual assistance on freelance platforms like Upwork or Fiverr can be a profitable venture.
Subscription Box Service: Subscription boxes have gained immense popularity. Curating unique, themed products and delivering them to subscribers regularly can be a fun and profitable business.
## Conclusion
The rise of online business represents a fundamental shift in how commerce is conducted. Its role in today’s economy is pivotal, offering numerous benefits such as global reach, lower overhead costs, flexibility, and access to valuable data. With countless online business ideas to explore, entrepreneurs have an exciting array of opportunities to pursue. As technology continues to evolve, the potential for online business will only grow, making it an essential component of the modern entrepreneurial landscape.
| stevemax237 |
|
1,910,397 | AWS Ambassador for the 2nd time | 𝐈’𝐦 𝐭𝐡𝐫𝐢𝐥𝐥𝐞𝐝 𝐭𝐨 𝐬𝐡𝐚𝐫𝐞 𝐭𝐡𝐚𝐭 𝐈’𝐯𝐞 𝐛𝐞𝐞𝐧 𝐡𝐨𝐧𝐨𝐫𝐞𝐝 𝐰𝐢𝐭𝐡 𝐭𝐡𝐞 𝐭𝐢𝐭𝐥𝐞 𝐨𝐟 𝐀𝐖𝐒 𝐀𝐦𝐛𝐚𝐬𝐬𝐚𝐝𝐨𝐫! This incredible... | 0 | 2024-07-03T16:25:29 | https://dev.to/aws-heroes/aws-ambassador-for-the-2nd-time-43fh | aws, awscloud, awsambassador, leadership | 𝐈’𝐦 𝐭𝐡𝐫𝐢𝐥𝐥𝐞𝐝 𝐭𝐨 𝐬𝐡𝐚𝐫𝐞 𝐭𝐡𝐚𝐭 𝐈’𝐯𝐞 𝐛𝐞𝐞𝐧 𝐡𝐨𝐧𝐨𝐫𝐞𝐝 𝐰𝐢𝐭𝐡 𝐭𝐡𝐞 𝐭𝐢𝐭𝐥𝐞 𝐨𝐟 𝐀𝐖𝐒 𝐀𝐦𝐛𝐚𝐬𝐬𝐚𝐝𝐨𝐫!
This incredible achievement reflects my dedication and continuous contribution to the AWS community, my commitment to driving innovation in cloud computing and delivering excellence to our customers.
Re-joining the ranks of AWS Ambassadors representing Intuitive.Cloud is a significant milestone in my journey, and I am excited to continue contributing to the AWS ecosystem. This role empowers me to further support our community, share valuable insights, and foster the adoption of AWS technologies.
Thank you to everyone who has supported me along the way. Let's keep pushing the boundaries of what's possible with AWS!
A heartfelt thanks our CEO, Jay Ashok Modh and the CxO Team - Indraneel Shah Mir Navazish Ali Troy Wyatt Kapil Kapoor for all their support. Together with my fellow AWS Ambassador, Piyush Jalan, we are excited to help our customers reap the benefits of #AWSCloud.
Thanks a lot to the AWS team for their unwavering support and encouragement.
Lalitesh Kumar Matthijs ten Seldam Ridhima Kapoor Shafraz Rahim Ross Barich Taylor Jacobsen Jen Looper 🌤 Farrah Campbell Karthik Sathuragiri Kumara Raghavan
Your belief in me has been instrumental in reaching this milestone.
Checkout the profile here:
https://aws.amazon.com/partners/ambassadors/?cards-body.sort-by=item.additionalFields.createDate&cards-body.sort-order=desc&awsf.apn-ambassadors-location=*all&cards-body.q=Bhuvaneswari%2BSubramani&cards-body.q_operator=AND
**Ambassador Profile:**
> Bhuvaneswari Subramani is a Chief Cloud Evangelist at Intuitive.Cloud, bringing 24 years of IT experience. Specializing in Cloud Modernization, DevOps, Cloud Alliance, Cloud Financial Management, and Cloud Managed Services with a strong focus on AWS PLS 2.0. She fervently drives Outreach programs aimed to enhance mindshare on the latest and greatest from AWS Cloud. As a self-made woman in tech, she is always excited to promote diversity and enable the tech industry to be more inclusive, and was honored by AWS as one of the five recipients across the globe of the AWS re:Invent 2018 Community Leader Diversity Scholarship, she was featured in AWS Developer Story in 2021, and recipient of the prestigious Now Go Build Award 2022 from Amazon CTO Dr. Werner Vogels. She has been a passionate blogger since 2009 and an active speaker on Technology and Leadership in AWS Communities, international conferences, TEDx and universities. AWS featured her in the Developer of AWS video in Nov 2020 to motivate more women in the tech space. She is one of the community leaders of AWS User Group, Bengaluru. She is also an active speaker at AWS community events and industry conferences and delivers guest lectures, defining the curriculum on Cloud Computing for staff and students at engineering colleges across India. Bhuvaneswari is a technophile and IT Blogger, who meticulously and picturesquely depicts the events that inspire and influences her. Her passion for technical writing is exemplified in the form of tech blog DevOps and CloudComput.
**Social Links:**
[LinkedIn](https://www.linkedin.com/feed/update/urn:li:activity:7214295469978501120/), [Facebook](https://www.facebook.com/photo/?fbid=8024850307535634) | bhuvanas |
1,910,253 | Animated Splash Screen in .NET MAUI Android | This article is part of the #MAUIUIJuly initiative by Matt Goldman. You'll find other helpful... | 0 | 2024-07-03T16:24:13 | https://dev.to/icebeam7/animated-splash-screen-in-net-maui-android-2ipg | dotnet, android, dotnetmaui, mauiuijuly | > This article is part of the [#MAUIUIJuly](https://goforgoldman.com/posts/mauiuijuly-24/) initiative by [Matt Goldman](https://twitter.com/mattgoldman). You'll find other helpful articles and tutorials published daily by community members and experts there, so make sure to check it out every day.
Beginning with **Android 12**, the [Splash Screen API](https://developer.android.com/develop/ui/views/launch/splash-screen) allows you to define an animated splash screen that plays when the app starts (without having to set up a custom Activity with a gif or an animation, as some people would not consider it a *true splash screen*). This API also allows you to:
* customize the icon background color
* customize the window background color
* set up a transition to the app after the splash screen plays
Before I explain how to do it in a .NET MAUI app, let's be clear about some important things:
- An animated splash screen in Android is defined as an [Animated Vector Drawable](https://developer.android.com/reference/android/graphics/drawable/AnimatedVectorDrawable).
- Currently, Launch Screens on iOS can't be animated unless you [apply some tricks](https://createwithflow.com/tutorials/launchAnimationStepByStep/) (in general, you can do the same in a .NET MAUI app, simply set the `MainPage` in `App.xaml.cs` to any `ContentPage` which starts immediately after the static Splash Screen plays and that contains some sort of animation, such as a .gif, a [Lottie animation](https://www.youtube.com/watch?v=o5X5yXdWpuc) or of course, [Animations](https://learn.microsoft.com/en-us/dotnet/maui/user-interface/animation/basic?view=net-maui-8.0)). Then, after the animation ends, navigate to your _true Home Page_. However, some people might argue that that's not really a Splash Screen, although it does the job of playing an animation before the user is finally able to interact with the application :)
- Disclaimer: this is not really a new topic. Several blog posts on Internet already talk about the Splash Screen Android API in a .NET MAUI app to customize the window and icon background color, for example. However, I only found [one](https://blog.noser.com/android-splash-screen-api-and-dotnet-maui/) -in German language- which implements the animated splash screen. By the way, [here](https://trailheadtechnology.com/android-splash-screen-logos-and-animations-with-xamarin/) is another blog post that explains how to do the same for our old good pal Xamarin.
Anyways, let's code!
## Step 1. Add a NuGet package
Add the `Xamarin.AndroidX.Core.SplashScreen` NuGet package to your .NET MAUI project.
## Step 2. Add an AVD as an AndroidResource
Add the Animated Vector Drawable where you define your animation. You can use tools such as [ShapeShifter](https://shapeshifter.design/) to create them from SVG files. There is also an interesting [CLI tool](https://github.com/garawaa/lottie-to-avd) that converts Lottie Json Animations to Android Animated Vector Drawable XML
- You might need to create a `drawable` folder under `Platforms/Android/Resources`.
- Set the `Build Action` of the file to `AndroidResource`.
Sample Animated Vector Drawable:
```
<animated-vector
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:aapt="http://schemas.android.com/aapt">
<aapt:attr name="android:drawable">
<vector
android:name="vector"
android:width="32dp"
android:height="32dp"
android:viewportWidth="32"
android:viewportHeight="32">
<group android:name="group">
<path
android:name="path_end"
android:pathData="M 15.12 15.53 L 25 5.66 C 25.191 5.496 25.437 5.411 25.689 5.42 C 25.941 5.43 26.18 5.534 26.358 5.712 C 26.536 5.89 26.64 6.129 26.65 6.381 C 26.659 6.633 26.574 6.879 26.41 7.07 L 17.35 16.13 L 26.15 24.93 C 26.336 25.117 26.441 25.371 26.441 25.635 C 26.441 25.899 26.336 26.153 26.15 26.34 C 26.026 26.465 25.871 26.555 25.7 26.601 C 25.53 26.647 25.35 26.647 25.18 26.601 C 25.009 26.555 24.854 26.465 24.73 26.34 L 15.12 16.73 C 14.961 16.571 14.872 16.355 14.872 16.13 C 14.872 15.905 14.961 15.689 15.12 15.53 Z"
android:fillColor="#00446a"
android:fillAlpha="0"
android:strokeWidth="1"/>
<path
android:name="path_start"
android:pathData="M 5.54 15.53 L 15.42 5.66 C 15.564 5.492 15.76 5.376 15.978 5.331 C 16.195 5.286 16.421 5.315 16.62 5.413 C 16.819 5.51 16.98 5.671 17.077 5.87 C 17.175 6.069 17.204 6.295 17.159 6.512 C 17.114 6.73 16.998 6.926 16.83 7.07 L 7.77 16.13 L 16.57 24.93 C 16.756 25.117 16.861 25.371 16.861 25.635 C 16.861 25.899 16.756 26.153 16.57 26.34 C 16.383 26.526 16.129 26.631 15.865 26.631 C 15.601 26.631 15.347 26.526 15.16 26.34 L 5.54 16.73 C 5.381 16.571 5.292 16.355 5.292 16.13 C 5.292 15.905 5.381 15.689 5.54 15.53 Z"
android:fillColor="#00446a"
android:fillAlpha="0"
android:strokeWidth="1"/>
</group>
</vector>
</aapt:attr>
<target android:name="path_start">
<aapt:attr name="android:animation">
<set>
<objectAnimator
android:propertyName="fillAlpha"
android:startOffset="500"
android:duration="500"
android:valueFrom="0"
android:valueTo="1"
android:valueType="floatType"
android:interpolator="@android:anim/linear_interpolator"/>
<objectAnimator
android:propertyName="fillColor"
android:startOffset="1000"
android:duration="500"
android:valueFrom="#00446a"
android:valueTo="#ff2266"
android:valueType="colorType"
android:interpolator="@android:interpolator/fast_out_slow_in"/>
<objectAnimator
android:propertyName="fillAlpha"
android:startOffset="2000"
android:duration="500"
android:valueFrom="1"
android:valueTo="0.5"
android:valueType="floatType"
android:interpolator="@android:anim/linear_interpolator"/>
<objectAnimator
android:propertyName="fillAlpha"
android:startOffset="2500"
android:duration="500"
android:valueFrom="0.5"
android:valueTo="1"
android:valueType="floatType"
android:interpolator="@android:anim/linear_interpolator"/>
</set>
</aapt:attr>
</target>
<target android:name="path_end">
<aapt:attr name="android:animation">
<set>
<objectAnimator
android:propertyName="fillAlpha"
android:startOffset="300"
android:duration="800"
android:valueFrom="0"
android:valueTo="1"
android:valueType="floatType"
android:interpolator="@android:anim/linear_interpolator"/>
<objectAnimator
android:propertyName="fillAlpha"
android:startOffset="1100"
android:duration="800"
android:valueFrom="1"
android:valueTo="0.5"
android:valueType="floatType"
android:interpolator="@android:anim/linear_interpolator"/>
<objectAnimator
android:propertyName="fillAlpha"
android:startOffset="1900"
android:duration="600"
android:valueFrom="0.5"
android:valueTo="1"
android:valueType="floatType"
android:interpolator="@android:anim/linear_interpolator"/>
</set>
</aapt:attr>
</target>
</animated-vector>
```
## Step 3. Define a Theme
Next up, add a `themes.xml` file under `Platforms/Android/Resources/values`. Set its `Build Action` to `AndroidResource` as well.
In this file you configure a `style`:
- You **must** set a name for your theme (style) because it will be referenced later in `MainActivity.cs`.
- The theme **must** inherit from `Theme.SplashScreen` (use the `parent` property for that).
- You **must** set the element in the animated splash screen using the `windowSplashScreenAnimatedIcon` attribute in an `item` element.
- You must set the `windowSplashScreenAnimationDuration` value **only if your app targets Android 12**. Otherwise, the value is optional and is obtained from the Animated Vector Drawable itself.
- The `windowSplashScreenBackground` that defines the background color for the starting window is **optional**.
- According to [this reference](https://developer.android.com/develop/ui/views/launch/splash-screen/migrate), you **must** also set the `postSplashScreenTheme` property to the theme that the Activity will use after the Splash Screen dissapears.
Sample code for `themes.xml`:
```
<resources>
<style name="Theme.Animated" parent="Theme.SplashScreen">
<item name="windowSplashScreenBackground">@android:color/white</item>
<item name="windowSplashScreenAnimatedIcon">@drawable/cloud</item>
<item name="windowSplashScreenAnimationDuration">1300</item>
<item name="postSplashScreenTheme">@style/Maui.MainTheme.NoActionBar</item>
</style>
</resources>
```
## Step 4. Call InstallSplashScreen in MainActivity before calling base.onCreate().
- In `MainActivity.cs`, override its `onCreate` method and invoke the `InstallSplashScreen` static function before `base.onCreate()`.
- The class `AndroidX.Core.SplashScreen.SplashScreen` is required and it can be imported with the `static` modifier.
- And don't forget to set the value for `Theme` in the `Activity` attribute. Simply set it to the name that you previously defined in your style (in `themes.xml`):
Code for `MainActivity.cs`:
```
using Android.App;
using Android.Content.PM;
using Android.OS;
using static AndroidX.Core.SplashScreen.SplashScreen;
namespace AnimatedSplashScreenApp
{
[Activity(Theme = "@style/Theme.Animated", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize | ConfigChanges.Density)]
public class MainActivity : MauiAppCompatActivity
{
protected override void OnCreate(Bundle savedInstanceState)
{
var splash = InstallSplashScreen(this);
base.OnCreate(savedInstanceState);
}
}
}
```
## Step 5. (Clean, Re)Build & Test your App
Now you can build and test your app. This is the outcome:
In case you edit the animation and can't see the latest version of it, simply Clean and Rebuild the project.
As you can see, it is very easy to add an animated splash screen in Android using .NET MAUI. Perhaps the hardest part is to play with the svg and create an animation from it. You can get some inspiration from these [animated vector drawables](https://github.com/alexjlockwood/adp-delightful-details) or learn more about the Shape Shifter tool with a [tutorial](https://medium.com/@ecspike/creating-animatedvectordrawables-with-shape-shifter-543d099285b9).
By the way, you can do even more things. As explained [here](https://blog.noser.com/android-splash-screen-api-and-dotnet-maui/) -in German language-:
- There can be situations in which you want to extend the animation display time because you would like to do some work in the background, such as loading app settings or data before the first view is displayed. To do this, you can register a listener with the `ViewTreeObserver` and define a `OnPreDraw` function from the `IOnPreDrawListener` interface on `MainActivity`.
- By implementing the `IOnExitAnimationListener` interface, you can set the exit animation, such as a slide-up that looks pretty neat.
- You can also add a branding image in your Splash Screen by defining it in the style (`themes.xml`). Use the [`windowSplashScreenBrandingImage`](https://developer.android.com/develop/ui/views/launch/splash-screen) property for that.
The source code of this blog post can be found [here](https://github.com/icebeam7/AnimatedSplashScreenApp).
I hope that this post was interesting and useful for you. Thanks for your time, and enjoy the rest of the [#MAUIUIJuly](https://goforgoldman.com/posts/mauiuijuly-24/) publications!
## Other references
1. [Let's customize the Splash Screen of a MAUI app](https://blog.ewers-peters.de/lets-customize-the-splash-screen-of-a-maui-app)
2. [Sketch + Animated Vector Drawable = ❤️](https://proandroiddev.com/sketch-animated-vector-drawable-%EF%B8%8F-41fb63465b61)
3. [An Introduction to Icon Animation Techniques](https://www.androiddesignpatterns.com/2016/11/introduction-to-icon-animation-techniques.html)
| icebeam7 |
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1,910,406 | Day 1: Error During Node.js Installation - Error : `node: command not found` | Cause: This error occurs when Node.js is not properly installed on your system or the path is not... | 0 | 2024-07-03T16:20:27 | https://dev.to/dipakahirav/day-1-error-during-nodejs-installation-error-node-command-not-found-43c4 | node, npm, learning | **Cause**: This error occurs when Node.js is not properly installed on your system or the path is not correctly set.
please subscribe to my [YouTube channel](https://www.youtube.com/@DevDivewithDipak?sub_confirmation=1
) to support my channel and get more web development tutorials.
**Solution**:
#### Step-by-Step Solution
1. **Download Node.js**:
- Visit the [official Node.js website](https://nodejs.org/).
- Choose the appropriate installer for your operating system (Windows, macOS, or Linux).
- Download the installer and follow the on-screen instructions to install Node.js.
2. **Verify Installation**:
- Open your terminal (Command Prompt on Windows, Terminal on macOS/Linux).
- Run the following command to check if Node.js is installed correctly:
```bash
node -v
```
- If Node.js is installed, this command will display the version of Node.js installed. For example, `v16.0.0`.
3. **Setting the Path** (if the above steps don’t work):
- **For Windows**:
1. Open the Start menu and search for `Environment Variables`.
2. Click on `Edit the system environment variables`.
3. In the System Properties window, click on the `Environment Variables` button.
4. Under `System variables`, find the `Path` variable and click `Edit`.
5. Click `New` and add the path to the Node.js installation directory. For example, `C:\Program Files\nodejs\`.
6. Click `OK` to save the changes and close all windows.
7. Restart your Command Prompt and verify the installation again with:
```bash
node -v
```
- **For macOS/Linux**:
1. Open your terminal.
2. Open your shell profile file in a text editor (`.bashrc`, `.bash_profile`, `.zshrc`, etc. depending on your shell):
```bash
nano ~/.bashrc
```
3. Add the following line to the file to include the Node.js installation directory in your PATH:
```bash
export PATH=$PATH:/usr/local/bin/node
```
4. Save the file and reload the changes with:
```bash
source ~/.bashrc
```
5. Verify the installation again with:
```bash
node -v
```
This should resolve the `node: command not found` error and successfully install Node.js on your system.
please subscribe to my [YouTube channel](https://www.youtube.com/@DevDivewithDipak?sub_confirmation=1
) to support my channel and get more web development tutorials.
### Follow and Subscribe:
- **Website**: [Dipak Ahirav] (https://www.dipakahirav.com)
- **Email**: [email protected]
- **YouTube**: [devDive with Dipak](https://www.youtube.com/@DevDivewithDipak?sub_confirmation=1
)
- **LinkedIn**: [Dipak Ahirav](https://www.linkedin.com/in/dipak-ahirav-606bba128)
- **Instagram**: [devdivewithdipak](https://www.instagram.com/devdivewithdipak)
Happy coding! 🚀 | dipakahirav |
1,910,405 | Kubernetes: Understanding Multi-Container Pods | Welcome back to our Kubernetes series! In this installment, we'll dive into the concept of... | 0 | 2024-07-03T16:19:37 | https://dev.to/jensen1806/kubernetes-understanding-multi-container-pods-f2i | tutorial, kubernetes, docker, devops | Welcome back to our Kubernetes series! In this installment, we'll dive into the concept of multi-container pods and explore related concepts through a hands-on demo. By the end of this post, you'll have a solid understanding of how multi-container pods work and how to set them up in your Kubernetes cluster.
### What is a Multi-Container Pod?
A multi-container pod is a Kubernetes pod that runs more than one container. These containers share the same network namespace, meaning they can communicate with each other directly via localhost. This setup is useful when you have tightly coupled applications that need to share resources and data.
There are two main types of containers in a multi-container pod:
1. **Init Containers**: These run and complete before the main application containers start. They are typically used for setup tasks.
2. **Sidecar Containers**: These run alongside the main application container and provide support, such as logging, monitoring, or proxying.
#### Example Scenario
Let's imagine you have a Kubernetes pod running an NGINX application container. You might also have an init container that sets up necessary configurations before the NGINX container starts. Additionally, you could have a sidecar container that continuously monitors logs and metrics.
### Setting Up a Multi-Container Pod
We'll now walk through creating a multi-container pod with an init container and a main application container.
**Step 1: Define the Pod Manifest**
We'll start by creating a YAML file for our pod. Open your preferred code editor and create a new file called multi-container-pod.yaml. Here's the content for the file:
```
apiVersion: v1
kind: Pod
metadata:
name: myapp-pod
spec:
containers:
- name: app-container
image: busybox
command: ['sh', '-c', 'echo The app is running; sleep 3600']
initContainers:
- name: init-service
image: busybox
command: ['sh', '-c', 'until nslookup myservice.default.svc.cluster.local; do echo waiting for service to be up; sleep 2; done']
- name: init-db
image: busybox
command: ['sh', '-c', 'until nslookup mydb.default.svc.cluster.local; do echo waiting for db service to be up; sleep 2; done']
```
In this file:
- The app-container runs a simple command to echo a message and sleep.
- The init-service and init-db containers wait for their respective services to be available before the main container starts.
**Step 2: Apply the Manifest**
Apply the manifest to your Kubernetes cluster using the following command:
```
kubectl apply -f multi-container-pod.yaml
```
**Step 3: Verify the Pod**
Check the status of the pod to ensure it's running correctly:
```
kubectl get pods myapp-pod
```
You should see the pod in a Running state once both init containers have completed their tasks.
**Step 4: Create the Services**
Next, we need to create the services that our init containers are waiting for. We'll create two deployments and expose them as services.
```
kubectl create deployment nginx-deploy --image=nginx
kubectl expose deployment nginx-deploy --name=myservice --port=80
kubectl create deployment redis-deploy --image=redis
kubectl expose deployment redis-deploy --name=mydb --port=6379
```
**Step 5: Verify the Services**
Ensure the services are running:
```
kubectl get svc
```
You should see myservice and mydb listed among the services.
### Conclusion
In this blog post, we've explored the concept of multi-container pods in Kubernetes. We've seen how init containers can be used to perform setup tasks before the main application container starts. We've also learned how to create and expose services that the init containers depend on.
Stay tuned for more in our Kubernetes series, where we'll continue to dive deeper into various aspects of Kubernetes and container orchestration. Don't forget to share your learnings on social media and help spread the word!
Happy learning!
For further reference, check out the detailed YouTube video here:
{% embed https://www.youtube.com/watch?v=yRiFq1ykBxc&list=WL&index=21 %} | jensen1806 |
1,910,402 | Buy GitHub Accounts | https://dmhelpshop.com/product/buy-github-accounts/ Buy GitHub Accounts GitHub holds a crucial... | 0 | 2024-07-03T16:15:43 | https://dev.to/siwoni5341/buy-github-accounts-4gh | learning, typescript, css, java | https://dmhelpshop.com/product/buy-github-accounts/
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Can You Buy GitHub Accounts?
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1,910,401 | Introduction to Closure | In simple words, you can remember closure as: A closure gives you access to an outer function's... | 27,846 | 2024-07-03T16:14:54 | https://dev.to/abhinavkushagra/introduction-to-closure-akl | webdev, javascript, beginners, programming | In simple words, you can remember closure as:
> A closure gives you access to an outer function's scope from an inner function.
**Closure is considered as the most powerful in all of Javascript programming.**
You don't believe me yet? Let's see:
> Imagine when you're in a good mood and talking to a friend. Everything seems right and you just greet everyone nicely because you feel like it to be there until someone pisses you off and then imagine talking to that friend or just imagine feeling about the friend. Everything seems falling off and you decide to blurt out.
Just like our code here:
```javascript
const greet = x => {
const name = y => {
// x is an outer variable
// inner function name has closure over it
return x + ' ' + y + '!';
}
return name;
}
const goodMood = greet('Hello');
// goodMood gets a reference to the inner 'name' function
// because we're returning 'name' function in 'greet' function
// with closure over the 'x' parameter of the outer function 'greet'
const badMood = greet('Get lost');
// badMood gets a reference to the inner 'name' function
// with closure over the 'x' parameter of the outer function 'greet'
let greetDavid = goodMood('David');
console.log(greetDavid); // Hello David!
greetDavid = badMood('David');
console.log(greetDavid); // Get lost David!
```
goodMood and badMood remember the variable 'Hello' or 'Get Lost' even when we thought the function has stopped running.
That's the power of 'Closure'.
_Hey, I was doing just fine before I met you 🎶 🎶 🎶_
[Source](https://tenor.com/en-GB/view/sad-gif-7523306793289960933)
| abhinavkushagra |
1,904,449 | How MySQL Tuning Can Dramatically Improve WordPress Performance | We hypothesize that MySQL tuning can significantly affect the performance of WordPress. If we can... | 0 | 2024-07-03T16:13:19 | https://releem.com/blog/web-applications-performance | mysql, wordpress, webdev, php | We hypothesize that MySQL tuning can significantly affect the performance of WordPress. If we can showcase the value of MySQL tuning, we believe that enterprises and organizations may be keen to incorporate this practice on a larger scale.
## How to Improve Application Performance
Improving application performance with tuning is best achieved with a comprehensive approach that addresses the following areas:
- Server Resources — CPU, Memory, Storage
- Software Configurations — Linux, Nginx, Php…
- Database Management System (DBMS) Configurations — MySQL, PostgreSQL
- Optimize database scheme and change indexes
- Optimize applications — Code, Queries, Architecture…
Many experienced WordPress developers don’t look at database performance tuning as an opportunity to improve the performance of their apps because they know little about this domain. They spend a lot of time optimizing the codebase, but it reaches a point where it no longer brings a valuable result for the time and energy invested. Our research on how MySQL tuning positively affects the performance of popular open-source web applications is aimed at showcasing this fact to developers.
## Testing Approach
Our testing procedure lets us compare the WordPress performance before and after configuration. By first running the test with the default configuration, we gain valuable control results to compare the tuned configuration against.
For our WordPress test, we used:
- WordPress version 6.2.2 with the Twenty Twenty-Three theme (version 1.1). We installed FakerPress, WooCommerce, and WP Dummy Content Generator plugins to enrich our test scenario.
- AWS EC2 instance c5.xlarge with installed Ubuntu 22.04 as the operating system, Caddy v2.6.4 as the web server, MariaDB 10.6 set to the default configuration with a database size of 3 GB.
We used the following process to prepare and test each application:
1. Deploy Application.
2. Seed the database with 3GB of dummy data using FakerPress and WP Dummy Content Generator modules.
3. Prepare test for Locust.
4. Our test duration was 2 days. To handle this longer testing period, we switched from BlazeMeter (max test duration of 20 minutes) to [Locust](https://locust.io/), an open-source load-testing tool.
5. Tune MariaDB configuration after 1 day — our setup remained the same, but MariaDB was tuned for workload, server resources, and database size.
We published Locust tests, MySQL Status, and MySQL Variables during tests on [GitHub](https://github.com/Releem/webapps-performance-research).
## What metrics we looked at?
The metrics we looked at during this research are:
1. **Response Time ( Latency )** is the time between sending the request and processing it on the server side to the time the client receives the first byte. It is the important metric that gives you insight into server performance.
2. **Queries per second** is a metric that measures how many queries the database server executes per second.
3. **CPU Utilization**.
We collected **CPU Utilization** and **Queries per second** metrics to compare the workload.
## WordPress WooCommerce
[WordPress](https://wordpress.com/) is a widely-used content management system (CMS) for building and managing websites and blogs. It powers millions of sites globally, making it an integral part of the web landscape.
WordPress offers flexible design and functionality options, allowing users to create everything from simple blogs to complex eCommerce stores, with the ability to support massive amounts of content. It is available in over 200 languages and has been downloaded over 60 million times.
WooCommerce is a popular, free, open-source plugin for WordPress that transforms the WordPress website into a fully functional e-commerce online store. WooCommerce is used by many high-traffic websites and is one of the key players in the e-commerce platform market.
### MySQL Configuration
The configuration applied for WordPress WooCommerce is as follows:
### Tuned Configuration for WordPress
```
[mysqld]
query_cache_type=1
query_cache_size=134217728
query_cache_limit=16777216
query_cache_min_res_unit=4096
thread_cache_size=0
key_buffer_size=8388608
sort_buffer_size=2097152
read_rnd_buffer_size=262144
bulk_insert_buffer_size=8388608
myisam_sort_buffer_size=8388608
innodb_buffer_pool_chunk_size=134217728
max_heap_table_size=16777216
tmp_table_size=16777216
max_connections=151
innodb_flush_log_at_trx_commit=1
innodb_log_buffer_size=16777216
innodb_write_io_threads=4
innodb_read_io_threads=4
innodb_file_per_table=1
innodb_flush_method=O_DIRECT
innodb_thread_concurrency=0
innodb_purge_threads=4
innodb_change_buffering = changes
innodb_change_buffer_max_size = 15
thread_cache_size = 0
innodb_buffer_pool_size = 2952790016
innodb_log_file_size = 738197504
myisam_sort_buffer_size = 8388608
join_buffer_size = 8388608
table_open_cache = 2048
table_definition_cache = 1408
optimizer_search_depth = 0
thread_handling = pool-of-threads
thread_pool_size = 3
```
We published a detailed [MySQL Performance Tuning Tutorial](https://releem.com/blog/mysql-performance-tuning).
### Testing Results
The WordPress WooCommerce testing results showcased sizeable performance improvements between the default and tuned configurations.
The optimization of MySQL resulted in a significant improvement in the average server **Response Time**, which was **reduced** from 860 milliseconds to a snappy 250 milliseconds.
As previously stated, we transitioned to using Locust for testing our WordPress site, which introduced an extra measure of performance — the **Requests per second**. This metric shows how frequently the testing tool is making requests to the website. Before we made any adjustments, the value stood at 3 requests per second. However, after fine-tuning the server settings, this figure **doubled** to 6 requests per second, indicating a 100% increase. This **increased rate** suggests that the optimized server is now capable of accommodating a larger number of users.
Average **CPU utilization** fell by 86%, while **Queries per second** increased by a whopping 106%.
The graph of the results is available below:
_Response Time (Latency) (-42%), WordPress Tuned MySQL Configuration vs Default_
_Requests per Second (RPS) (+100%), WordPress Tuned MySQL Configuration vs Default_
_CPU Utilization (-37%), WordPress Tuned MySQL Configuration vs Default_
_Queries Per Seconds (+106%), WordPress Tuned MySQL Configuration vs Default_
### Community Contributors
For our testing setup and environment, we partnered with Adam Makowski, the CEO and Founder of [MYFT](https://www.myft.cloud/), a firm specializing in enterprise-class WordPress Cloud Hosting and WooCommerce Cloud Hosting. Adam brings a wealth of knowledge and experiences catering to demanding clientele. We are deeply appreciative of his contributions to our endeavors.
Adam was instrumental in setting up the WordPress WooCommerce website for our tests. His expertise was invaluable in preparing the environment and seeding the database, ensuring a comprehensive and rigorous assessment of WordPress’s performance.
### Conclusion
Our testing procedure, using WordPress Wocommerce, showed dramatic improvements in **Response Time (Latency), CPU Utilization**, and **Queries per second** after configuring the database server configuration.
**Responce Time (Latency)** dropped between 42%, while **CPU Utilization fell 37%**. Queries per second increased WordPress WooCommerce by 106%.
_With this research, we hope to showcase the value of MySQL tuning as a means to improve the performance of WordPress applications and encourage WordPress developers to consider this practice when optimizing the performance of their websites._
Using tools like [Releem](https://releem.com/), you can tune databases for optimal performance and keep them fast, secure and reliable.
| drupaladmin |
1,894,728 | 6 ways to turn your browser into super-debug-hero (ft. node.js + next.js!) | Unlike some of my other posts, this one is going to be straight-forward. I'll cover some of the... | 0 | 2024-07-03T16:10:36 | https://dev.to/middleware/6-ways-to-turn-your-browser-into-super-debug-hero-ft-nodejs-nextjs-36c3 | webdev, javascript, testing, frontend | Unlike some of my [other posts](https://dev.to/jayantbh), this one is going to be straight-forward.
I'll cover some of the less-frequently-used browser devtools features that I've used over my career.
Some basic things are excluded, so as to not completely waste your time.
Things such as using “console.log”, editing CSS in the styles panel, editing HTML in the Elements tab, $0 element reference, etc.
### Table of contents:
1. [Breakpoints](#1-breakpoints-)
2. [Performance Profiling](#2-performance-profiling-)
3. [Responsive Mode](#3-responsive-mode-aka-device-mode-)
4. [Lighthouse](#4-lighthouse-and-core-web-vitals-)
5. [Layers](#5-layers-inspector-)
6. [Console.notJustLog](#6-consolenotjustlog-)
Bonuses:
1. [Node.js debugging + typescript](#bonus-7-nodejs-debugging-in-chrome-)
2. [Next.js server side debugging](#bonus2-8-nextjs-server-side-debugging-)
**Let’s go!** 🚀🚀🚀
---
## 1. Breakpoints! [\[🔝\]](#table-of-contents)
My goodness this was the first debugging thing that blew my mind about why debuggers are actually useful.
The idea is simple. Code, is written line-by-line.
When you’re trying to spot bugs, you’re following the flow of execution line by line.
Variables are assigned values, functions are called, loops run, etc. which all reads or writes data from places.
> _You’ll find this thing in the **SOURCES** tab in DevTools._
And by placing breakpoints you can see the state of your code, and the **data contained within** to understand how your code is actually running.
Makes it a lot easier to find bugs! It’s a **LOT faster than placing a million `console.log`s** everywhere. You can even modify the values in memory at your breakpoint!
It’s literally as simple as double-clicking a value to change it! (in most cases)
For further reading: [Pause your code with breakpoints | Chrome DevTools | Chrome for Developers](https://developer.chrome.com/docs/devtools/javascript/breakpoints)
## 2. Performance Profiling [\[🔝\]](#table-of-contents)
“Why does this action take longer than it should? It’s not like I’m making any API calls here.”
Code (sometimes) works in mysterious ways.
Obviously it shouldn’t, but often you’ll find yourself in legacy codebases, or just repos that became a bit of a mess over time. Features or actions that should seem super straight-forward in how they work, somehow end up causing a lag on the UI, trigger re-renders, multiple API calls, or what not.
When you run into situations where **user interactions (not async stuff) aren’t happening “near-instantly” on the UI**, you’re probably putting the CPU under too much load.
Examples when this could happen:
* Modifying a large list of items
* Calculating some stats from a dataset, on the browser
* Complex map/filter/reduce usages
* Browser-side search over a dataset
One option is to understand where that “blocked time” is being spent.
Presenting, the “Performance Profiler”! Present in the “Performance” tab in your devtools! (who could have guessed?)
You’ve already seen the screenshot above, but did you know you could also set up limits on how fast your CPU should be, and how many cores can it used at the same time?
You can also **open the "Sources" panel** to literally look at the source files to understand exactly which lines all this time is being spent.
Unfortunately, if you have an intermediate build step, like **webpack, rollup**, etc. this feature might not be that directly useful, since your JS code would be “compiled” (or “transpiled” if you prefer calling it that) into something that looks pretty different.
Look at it! I clearly have some recursive call issues combined with some CPU heavy logic going on. And because of the “Sources” panel above, I can see it’s happening because I created a pretty large for loop just for the sake of this example. 😄
## 3. Responsive Mode (aka. Device Mode) [\[🔝\]](#table-of-contents)
There’s a 99.8765% chance you know what this is.
Most of the internet traffic comes from Mobile devices now. There’s no way you haven’t resized your browser window a million times to see how it looks on different devices.
But responsive mode is a lot more configurable than most people are aware of.
**Generally people stick to the device presets.** It’s a dropdown that looks kinda like this:
However, it often feels insufficient to tell you how to actually see how comprehensive your media-query handling is, what breakpoints your web-app uses, and just leaves it kinda complicated to understand how your app will work on all kinds of devices…
Again, I’m talking about what happens **if you stick to only the presets**.
### Unlocking the full potential of “Responsive Mode”
See the small 3-dot menu at the top when you enable “Responsive Mode”?
Once you open that menu, just “show” all kinds of things that it lets you enable.
And finally, set the **Dimensions** dropdown value to **Responsive**.
This is what you can do now:
**Media Queries**
It’ll show you what media queries are used in your web-app. Clicking on them will resize the viewport to the selected width. I’m unsure if there’s a way to do this with height as well, but if you know, please leave a comment. 😃
**Rulers**
No guessing what your current viewport width is. A nice ruler along both axes tells you… well… exactly what you expect it to tell you.
**Device Pixel Ratio**
This is something that wouldn’t really bother you in your day-to-day, because the browser kinda automatically handles it.
But what this option is, is how many hardware pixels are needed to render a single software pixel.
Sorry, I won’t go too deep into that topic in this post, but MDN has you covered:
[Window: devicePixelRatio property - Web APIs | MDN](https://developer.mozilla.org/en-US/docs/Web/API/Window/devicePixelRatio)
This property particularly becomes relevant when you’re using the HTML Canvas for something.
**Device Type**
This is more of a useragent type thing. Changing this value tells the target server/website what kind of a device is the page being accessed from, and whether that device **supports touch** or not.
> *Various sites handle UIs for web and mobile very differently.*
You can even **resize it very conveniently** without having to resize the whole window, by dragging the corner at the bottom-right.
## 4. Lighthouse (and Core Web Vitals) [\[🔝\]](#table-of-contents)
In case you missed it, [Lighthouse](https://developer.chrome.com/docs/lighthouse/overview) is a tool to inform you about the overall “quality” of your webpage. You could NEVER guess what tab you’ll find this under. (Hint: It rhymes with Bright-house)
What’s covered under quality?
* Page loading performance and experience
* Accessibility of the page for people with certain restrictions
* SEO (aka. how well it might show up in search results)
* And other “best practices” stuff
The general idea is, the higher your lighthouse score is, the better:
* The experience of your users will be
* The visibility on search results will be
Better visibility + More users == Money (usually)
So, it might be important to you.
Lighthouse an give you pretty comprehensive data on how you can improve your page even further!
## 5. Layers Inspector [\[🔝\]](#table-of-contents)
“Why does my modal show up on top of this tooltip?”
“Why does this button show up on top of this overlay?”
Layers Inspector is one of the coolest looking features in your browser, that allows you to:
* See the stacking context of your elements
* Understand if there are elements unintentionally rendered under or over other elements
* Identify performance issues in certain layers
* View elements that may be getting partly or wholly rendered off-screen
* And most importantly… *Feel super cool about your work*. I mean… look at this thing!
P.S.: Edge calls it 3D View, but it’s a slightly differently functioning feature as well that still achieves many of the same things.
**Story-time:**
> Most recently we realized that our [product landing page](https://www.middlewarehq.com/) had a bug where each individual image and the menu item was rendered twice, exactly stacked on top of each other in a way that visually you couldn't tell anything was wrong.
> I was investigating something in the menu that looked off as a result because I was introducing some transparency styling which made the menu look weird.
> Decided to `Cmd+Shift+C` and check the element styles. Nothing particularly off. But I noticed that there were two instances of that element.
> **Now I decided to check the Layers Inspector**, and wouldn't you look at that! Our static site builder caused there to be duplicate instances of a lot of other images too! Thanks layers!
## 6. Console.notJustLog [\[🔝\]](#table-of-contents)
Did you know…
`console.log` is such a 2015 way of debugging at this point?
There are a LOT of things that the `console` object allows you to do.
Here’s a screenshot of all the things included within it!
tl;dr: Go read this: [console - Web APIs | MDN](https://developer.mozilla.org/en-US/docs/Web/API/console)
I’m going to cover my top 5 features under `console`.
**1. `console.table` is nuts!**
This is hands down one of the nicest ways to visualize most kinds of basic objects. It kinda doesn’t work too well when it comes to deeply nested objects, but, you know, for most objects it works fine enough!
**2. `console.group` helps with limiting logging overload for your eyes**
Okay, no one is getting rid of `console.log`. But there are times when you might need to log a few too many things, and then the actually useful information starts to get lost in a sea of other not-so-useful logs.
`console.group` allows you to nest your logs within groups that may be multiple levels deep!
P.S.: There’s also `console.groupCollapsed` if you don’t want your groups to be open by default.
**3. `console.assert` for conditional logging**
If you’ve ever done something like:
```js
if (mycondition) console.log('Log stuff')
```
You could make use of `console.assert` instead.
It only logs when the first argument is `false`.
**4. `console.count` for “incremental” logging**
Ever felt the need to check how many times a certain function got invoked, or just some logic ran, maybe understand how often a certain `useEffect` got triggered?
Here you go.
You don’t have to pass it a static string like `count label` either.
Pass it something like `user.id` or whatever is stored in your objects or variables, and you’ll see how many times your logic runs with those specific values.
For example, how many times did my `useEffect` get triggered while the user ID was `1001-1234`? That’s something you can answer with `console.count(user.id)` instead!
**5. `console.trace` to understand how your functions get called**
Functions. They can get called anywhere, and everywhere.
Sometimes it can be confusing to understand how a specific function actually gets called. Where it gets called from. This is going to be helpful for that.
**BONUS: `console.log`. With *flair!***
Sometimes the plain-old plain-text just isn’t enough for your needs… for those times, you have this:
```js
console.log('%cRed Text', 'color: red;');
console.log('%cGreen Text', 'color: green;');
console.log('%cBlue Text with Larger Font', 'color: blue; font-size: 18px;');
console.log('%cStyled Text', 'color: white; background-color: black; padding: 2px;');
```
## [BONUS] 7. Node.js Debugging, in Chrome?! [\[🔝\]](#table-of-contents)
**You can do it for both Javascript AND Typescript files!**
“What? Really? I had no idea!! But how is that even possible?!?”
Okay, too much, I know.
If this is already familiar with you, I would love to hear how YOU use node.js debugging in your browser, and if there’s an awesome new idea that I didn’t know about, I’ll add it to the post! (attributed to you of-course)
But for a lot of folks that don’t know that this is possible, here you go…
1. Start your node server using the `--inspect` flag. `node --inspect index.js`
1. If you’re using [**`tsx`**](npmjs.com/package/tsx) by any chance, it works in the same way. `tsx --inspect index.tsx`
2. Go to chrome://inspect/#devices. If you’re on a chromium based browser (edge, brave, arc), this URL should work.
1. You should see something like this.
2. Click on **inspect**
3. You should see a new window open that looks something like this: 
- You’ll notice that I was able to print the value of `process` object.
- That’s because this instance of devtools is running in the context of node.js 
**That’s it!**
Just like how you can debug browser side code, you an also debug server side code with this.
Look at me placing a debugger and all!
Note: See the *two* xmas.ts and utils.ts files? One of each of those is a [“sourcemap”](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/SourceMap) file.
Curious about what THAT project is? Check it out!
[jayantbh/xmas-cli: Christmas tree generator](https://github.com/jayantbh/xmas-cli)
## [BONUS/2!] 8. Next.js Server Side debugging?! [\[🔝\]](#table-of-contents)
Oh yeah! You can use all the capabilities of your Chrome Devtools to debug your Next.js applications server side logic. And it’s as simple as 1, 2, 3!
Pre-requisites: You have a nextjs app set up locally and all packages installed.
1. Run `NODE_OPTIONS='--inspect' yarn dev` or `NODE_OPTIONS='--inspect' npm run dev`
- Wait till the logs say something like:
```Debugger listening on ws://127.0.0.1:9230/3473fa37-03ec-4dc9-9769-3fd97998f0b7
For help, see: https://nodejs.org/en/docs/inspector```
2. Go to chrome://inspect/#devices and `inspect` the target that represents your app
- You might see something like this: 
- In this case, the one with `next/dist/server/lib/start-server.js` is the one I need to `inspect`
- An instance of DevTools will open.
3. Load your app! Go to localhost:3000 or whatever you app is supposed to load on. That’s it!
- At the start you might not see any files related to your app in the sources panel, but as you load parts of your app, it’ll begin to show up in devtools.
- Once it does, you can place breakpoints, see in-memory values, change things, etc!
---
Hope you found this useful. 🎉
I would love to hear other awesome ways you use your browser as the worlds greatest debugger, client-side or server side, in the comments! 😃 | jayantbh |
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Leveraging artificial intelligence and machine learning, Infisign.ai continuously improves its threat detection and response capabilities. The platform can identify unusual patterns of behavior and potential security breaches more effectively than traditional IAM solutions.
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Infisign.ai is designed to scale with your organization. Whether you are a small business or a large enterprise, the platform can accommodate your needs, providing flexible deployment options (on-premises, cloud, or hybrid) to suit various IT environments.
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The platform offers an intuitive and user-friendly interface, simplifying the management of identities and access controls. This ease of use can significantly reduce the administrative burden on IT staff and improve user adoption rates.
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6. Integration Capabilities
The solution seamlessly integrates with a wide range of existing systems and applications, enhancing its utility without necessitating major overhauls of current IT infrastructure. This includes compatibility with major cloud service providers and enterprise applications.
7. Cost-Effectiveness
Infisign.ai offers competitive pricing models that can provide cost savings over traditional IAM solutions. The platform's efficiency in managing identities and access controls can also lead to reduced operational costs in the long term.
8. Proactive Threat Mitigation
Infisign.ai proactively identifies and mitigates threats before they can cause damage. This preemptive approach to security helps to minimize risks and ensures the integrity and confidentiality of your data.
9. Enhanced User Experience
By simplifying the login process and providing secure single sign-on (SSO) capabilities, Infisign.ai enhances the user experience. Users can access multiple applications with a single set of credentials, reducing login fatigue and increasing productivity.
10. Customer Support and Training
Infisign.ai offers robust customer support and training programs to ensure that your team can fully leverage the platform's capabilities. Their support team is available to assist with any issues, ensuring smooth operation and quick resolution of problems.
Real-World Impact
Infisign's innovative solutions have delivered significant improvements for clients, from enhancing security and streamlining workflows to boosting productivity and reducing operational costs. Their cutting-edge IAM capabilities are transforming how organisations manage identity and access, providing a future-ready solution for digital security.
Discover More
Ready to revolutionise your identity and access management?
Explore Infisign's solutions and experience the future of digital security today. Visit Infisign for more information and to start your free trial.
By focusing on pioneering innovations and addressing the unique needs of various industries, Infisign is setting new standards in IAM. Embrace the future of secure and efficient identity management with Infisign.
| info_infisign_9c952a3e26a |
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1,908,876 | Git And Github Interview Questions (& Answer) For Beginners | Question-1: What is Git? What are the advantages of using Git? Answer: Git is a distributed version... | 27,972 | 2024-07-03T16:05:46 | https://dev.to/shemanto_sharkar/git-and-github-interview-questions-answer-for-beginners-4d80 | webdev, git, beginners, programming | **Question-1: What is Git? What are the advantages of using Git?**
**Answer:**
Git is a distributed version control system used to track changes in source code during software development. It allows multiple developers to work on a project simultaneously. Advantages include version tracking, branching and merging capabilities, collaboration facilitation, and offline work support.
**Question-2: What do you understand by the term "Version Control System"?**
**Answer:**
A Version Control System (VCS) is software that helps manage changes to documents, computer programs, large websites, and other collections of information. It allows multiple users to collaborate, track history, revert to previous versions, and manage branches of projects.
**Question-3: What is the difference between Git and GitHub?**
**Answer:**
Git is a version control system used for tracking changes in files, while GitHub is a web-based platform that uses Git for version control and provides a collaborative environment for hosting Git repositories, project management, and other features.
**Question-4: Name a few Git commands with their functions.**
**Answer:**
- `git init`: Initializes a new Git repository.
- `git clone`: Clones an existing repository.
- `git add`: Adds changes to the staging area.
- `git commit`: Records changes to the repository.
- `git push`: Uploads local repository content to a remote repository.
- `git pull`: Fetches and merges changes from a remote repository to the local repository.
- `git status`: Shows the status of changes in the working directory and staging area.
- `git branch`: Lists, creates, or deletes branches.
**Question-5: What is the difference between `git fetch` and `git pull`?**
**Answer:**
`git fetch` downloads changes from a remote repository but does not merge them into the local repository. It updates the remote tracking branches. `git pull` fetches changes from a remote repository and immediately merges them into the local branch. | shemanto_sharkar |
1,910,395 | Dockerized Spring Boot with Multi-Environment Configs | Dockerizing a Spring Boot application for multiple environments involves creating Docker images that... | 0 | 2024-07-03T16:04:43 | https://dev.to/minuth/dockerized-spring-boot-with-multi-environment-configs-5h4p | docker, springboot | Dockerizing a Spring Boot application for multiple environments involves creating Docker images that can be configured differently based on the deployment environment (development, testing, production, etc.). This ensures that the application behaves consistently across various development and deployment stages.
We will use Docker **Multi-Stage** and Spring Boot **Externalized Configuration** in this configuration.
Using Docker Multi-Stage builds allows for creating smaller, more efficient Docker images by separating the build process into multiple stages. This reduces the final image size. More detail about [Multi-stage builds | Docker Docs](https://docs.docker.com/build/building/multi-stage/).
Spring Boot Externalized Configuration, on the other hand, enables the application to be easily reconfigured for different environments without changing the code. This is achieved by externalizing environment-specific configurations, making the application more flexible and easier to manage across development, testing, and production environments. More detail about [Externalized Configuration :: Spring Boot](https://docs.spring.io/spring-boot/reference/features/external-config.html)
## Gradle Project
`Dockerfile`
```docker
# Stage 1: Build the application
FROM gradle:8.8-jdk17 AS build
# Set the working directory in the container
WORKDIR /app
# Copy the Gradle build files
COPY build.gradle settings.gradle ./
# Copy the source code
COPY src ./src
# Build the application
RUN gradle build --no-daemon
# Stage 2: Create the runtime image
FROM openjdk:17-jdk-slim
# Set the working directory in the container
WORKDIR /app
# Copy the built JAR file from the Gradle build stage
COPY --from=build /app/build/libs/*.jar app.jar
# Expose the port the application runs on
EXPOSE 8080
# Command to run the application
ENTRYPOINT ["java", "-jar", "app.jar", "--spring.config.location=optional:classpath:/,optional:file:config/"]
```
`.dockerignore`
```
# Ignore build directory where Gradle output files are stored
build/
# Ignore Gradle wrapper files
gradle/wrapper/gradle-wrapper.jar
gradle/wrapper/gradle-wrapper.properties
# Ignore IntelliJ IDEA project files
*.iml
.idea/
# Ignore Eclipse project files
.project
.classpath
.settings/
# Ignore NetBeans project files
nbproject/
# Ignore Mac OS X folder attributes
.DS_Store
# Ignore Linux trash files
.Trash-*
# Ignore node_modules if there's any front-end part
node_modules/
# Ignore log files
*.log
# Ignore temporary files
*.tmp
*.swp
*.swo
# Ignore backup and old files
*.bak
*.old
# Ignore environment files (optional, if you use them)
.env
.env.local
```
## Maven Project
`Dockerfile`
```docker
# Stage 1: Build the application
FROM maven:3.8.4-openjdk-17 AS build
# Set the working directory in the container
WORKDIR /app
# Copy the pom.xml and download dependencies
COPY pom.xml ./
RUN mvn dependency:go-offline -B
# Copy the source code and build the application
COPY src ./src
RUN mvn package -DskipTests
# Stage 2: Create the runtime image
FROM openjdk:17-jdk-slim
# Set the working directory in the container
WORKDIR /app
# Copy the jar file from the build stage
COPY --from=build /app/target/*.jar app.jar
# Expose the port the application runs on
EXPOSE 8080
# Command to run the application
ENTRYPOINT ["java", "-jar", "app.jar", "--spring.config.location=optional:classpath:/,optional:file:config/"]
```
`.dockerignore`
```
# Ignore target directory where Maven output files are stored
target/
# Ignore Maven local repository (optional)
.m2/
# Ignore IntelliJ IDEA project files
*.iml
.idea/
# Ignore Eclipse project files
.project
.classpath
.settings/
# Ignore NetBeans project files
nbproject/
# Ignore Mac OS X folder attributes
.DS_Store
# Ignore Linux trash files
.Trash-*
# Ignore node_modules if there's any front-end part
node_modules/
# Ignore log files
*.log
# Ignore temporary files
*.tmp
*.swp
*.swo
# Ignore build output
build/
# Ignore other files that are not needed in the image
*.bak
*.old
# Ignore environment files (optional, if you use them)
.env
.env.local
```
The `--spring.config.location=optional:classpath:/,optional:file:config/` parameter is used to specify the locations from which Spring Boot should load its configuration files. Here's a breakdown of what it does:
- `optional:classpath:/`: This tells Spring Boot to look for configuration files on the classpath (typically inside the JAR file). The `optional:` prefix means that Spring Boot will not fail if the configuration file is not found in this location.
- `optional:file:config/`: This tells Spring Boot to look for configuration files in the `config/` directory on the file system in the container.
By using this parameter, you can externalize your configuration files, making it easier to manage different configurations for different environments (development, testing, production) without changing the application code. This is particularly useful when you want to override default configurations with environment-specific settings.
In the context of the provided Dockerfile, this parameter allows the Docker container to use configuration files from the `config/` directory, which is mapped to a volume on the host machine. This way, you can easily update configuration settings without rebuilding the Docker image.
Build and run without Docker Compose file
- Build: `docker build -t springboot-dockerize .`
- Run: `docker run -p 8081:8080 -v D:/configuration/demo-spring-boot-dockerize/:/app/config/ springboot-dockerize`
- `-p 8081:8080`: This flag maps port 8081 on the host machine to port 8080 on the container. It allows you to access the application running inside the container via port 8081 on the host.
- `-v D:/configuration/demo-spring-boot-dockerize/:/app/config/`: This flag mounts the directory `D:/configuration/demo-spring-boot-dockerize/` from the host machine to the `/app/config/` directory inside the container. This is used to provide external configuration.
Using Docker Compose file
```yaml
version: '3.8'
services:
springboot-app:
image: springboot-dockerize
ports:
- "${HOST_PORT}:8080"
volumes:
- "${CONFIG_PATH}:/app/config/"
```
Using environment variables `HOST_PORT` and `CONFIG_PATH` allows for flexibility and reusability of the Docker Compose configuration.
- Run with system environment variables or `.env` file: `docker compose up --build`
Make sure to set the environment variables `HOST_PORT` and `CONFIG_PATH` in your system or in a `.env` file in the same directory as your `docker-compose.yml`:
```
HOST_PORT=8081
CONFIG_PATH=D:/configuration/demo-spring-boot-dockerize/
```
- Run with inline environment variable: `HOST_PORT=8081 CONFIG_PATH=D:/configuration/demo-spring-boot-dockerize/ docker compose up --build` | minuth |
1,910,394 | Please help me with this | I don't know this is , but it keeps coming when I try to run or debug the code from c++. Plz if... | 0 | 2024-07-03T16:03:01 | https://dev.to/gopal_chandlapur/please-help-me-with-this-711 | beginners, cpp, vscode |
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1,910,393 | Why serverless? Advantages and disadvantages of serverless computing explained | Nowadays, companies want to improve their IT infrastructure. One option is serverless. This allows... | 0 | 2024-07-03T16:02:40 | https://dev.to/florianlenz/why-serverless-advantages-and-disadvantages-of-serverless-computing-explained-2m1m | serverless, azure, softwaredevelopment, cloud | Nowadays, companies want to improve their IT infrastructure. One option is serverless. This allows developers to create and operate applications without having to worry about the server infrastructure.
Well-known services such as Azure Functions from Microsoft Azure and AWS Lambda from Amazon Web Services (AWS) are examples of how developers can run their application code serverless. However, these services are only part of what serverless offers. In addition to the ability to run code, databases, message brokers and API gateways can also be run serverless.
Serverless is an umbrella term for services that do not require their own server administration, scale automatically and are billed on a usage basis. These features make serverless an attractive option for companies that want to optimize costs, increase scalability and shorten time-to-market.
## What is serverless?
Serverless is a term that can be misunderstood. Serverless does not mean that there are no more servers. There are still servers on which your applications run. The difference is that you no longer have to take care of the servers. As a developer, you don't have to buy, deploy or maintain a physical server. You write your code, deploy it and the cloud provider takes care of the rest.
And that rest can be a lot. If you currently run your applications on-premise, you may be familiar with the following situations:
- You need new hardware and have to order it.
- The hardware needs to be installed.
- You have to make updates and keep the servers secure.
- If a server goes down, you need to know what to do.
This list can go on and on. With serverless, you don't have to worry about anything.
Serverless means:
- No server management: you no longer have to worry about the servers.
- The resources are automatically adjusted so that there is always enough capacity available.
- You only pay for the resources you use.
These features have advantages and disadvantages. Let's assume an HTTP endpoint is only called ten times a month. In this case, it is better to run serverless. You only pay for the ten calls. This is cheaper than running a server all year round.
The pay-as-you-go cost model is not always the best solution. If your requests are constant and highly predictable, it may be cheaper to run a fixed number of servers.
Whether serverless makes sense for your application depends on your specific needs and usage patterns. In later sections, I will explain how to do the evaluation.
## Comparison of on-premise vs. IaaS vs. CaaS vs. PaaS vs. FaaS
Switching from traditional on-premise models to modern cloud solutions can be a big improvement for many companies. To better understand the different models, here is a comparison:
## On-Premise
With this model, the server is located in the company's own data center. All tasks, from hardware procurement, installation and maintenance to scaling and security updates, are the responsibility of the company. This costs a lot of money and requires many employees.
## Infrastructure as a Service (IaaS)
The first step into the cloud. Here, the cloud provider takes care of the hardware and virtualization. You no longer have to order or install physical hardware. Instead, you can set up virtual machines with just a few clicks. However, you still have to manage the operating system, scaling and application.
## Container as a Service (CaaS)
Container as a Service is a further development of IaaS. The cloud provider takes over the management of the container orchestration system, such as Docker or Kubernetes. This makes it easier to manage and scale containerized applications, but the company still has to maintain the container infrastructure and applications.
## Platform as a Service (PaaS)
The cloud provider also takes care of the operating system and the runtime environment. Developers only have to take care of the application, its scaling and configuration. PaaS does a lot automatically and relieves the IT department. Nevertheless, you can still do a lot yourself.
## Functions as a Service (FaaS)
FaaS stands for "Functions as a Service". The cloud provider takes over the management of the entire infrastructure. You only take care of the application code and functions. Scaling takes place automatically and is scaled up or down as required. Billing is based on actual usage (pay as you go). This is particularly good for applications with irregular or unpredictable loads.
Each model has its advantages and is suitable for different requirements and usage patterns. Serverless or FaaS is good if you are looking for a flexible, affordable and fast solution. Then you can focus on development and business value instead of worrying about infrastructure.
## Load distribution: a decisive factor for the choice of serverless
Serverless is a sensible architecture if the load distribution is right.
Let's imagine an application that has an even load from 7 am to 7 pm. In this case, serverless does not make sense. The load is even and predictable. It is not necessary to adjust the performance automatically. If each execution is billed individually, it does not make sense in terms of costs.
The situation is different for applications with unpredictable loads. Let's take an application that receives many requests at different times. Sometimes there are few requests, sometimes many. This pattern shows that serverless could be a good solution. Serverless automatically adapts to the current demand. You only pay for the resources you use.
You need to know what your application needs and how it is used. A precise analysis shows whether serverless is the right choice. Serverless is good for applications with fluctuating loads. It scales automatically and is billed according to consumption.
If your application has a stable and predictable load, a traditional cloud solution might be better. For irregular and unpredictable loads, serverless is better because it adjusts automatically and is cheaper.
## Conclusion: Serverless - an innovative solution with clear advantages and some challenges
Serverless is a technology that makes the management of servers superfluous. It ensures that applications can be developed and provided faster and more cost-effectively.
Serverless has the following advantages:
- No server management: developers can concentrate on the code without having to worry about the infrastructure.
- Serverless applications scale automatically as more or fewer users access them. This is particularly practical when user numbers fluctuate greatly.
- Cost optimization: You only pay for the resources you use. This is particularly cost-efficient when the number of users is low.
- The time-to-market is shorter because developers can concentrate on developing new functions.
Serverless also has disadvantages:
- You are dependent on one provider. If you want to switch, it can be difficult.
- Companies have less control over the hardware and operating system.
- If there is little use, it takes longer for functions to start. The instances are then scaled down to zero. However, some providers have already developed solutions for this.
Serverless is particularly suitable for applications that are used a lot or a little. The automatic scaling and usage-based billing are very advantageous in such scenarios. For applications with a stable and predictable load, traditional cloud models such as IaaS or PaaS are often more favorable.
## Get the Serverless Cheatsheet now!
Are you ready to utilize the full potential of your software? Our cheatsheet gives you an overview of the differences between IaaS, PaaS and FaaS and helps you find the best solution for your next application. Don't miss out on this valuable resource to help you make informed decisions and optimize your IT infrastructure.
## References
- [Was ist Serverless](https://www.florian-lenz.io/blog/was-ist-serverless)
- [Was ist Serverless? | Azure Serverless Computing einfach erklärt](https://youtu.be/OhK5FX5PJyc) | florianlenz |
1,910,392 | Unleashing the Power of Web Development: What Sets Appnovation Apart | In the fast-paced digital era, having a robust online presence is crucial. Appnovation stands out in... | 0 | 2024-07-03T16:02:21 | https://dev.to/james_evelyn125/comprehensive-guide-to-digital-marketing-services-lnh | tutorial, webdev, beginners | In the fast-paced digital era, having a robust online presence is crucial. Appnovation stands out in the competitive landscape of web development by offering a comprehensive suite of services tailored to meet diverse business needs. Here’s why Appnovation is a formidable competitor:
## Comprehensive Service Offering
Appnovation excels in providing an extensive range of web development services, including:
- Custom Web Development: Tailored solutions designed to meet unique business needs.
- Responsive Design: Ensuring seamless user experiences across all devices.
- E-commerce Solutions: Building secure and scalable online stores.
- Content Management Systems (CMS): Specializing in platforms like Drupal and Contentful.
- Mobile Web Development: Creating mobile-first designs that enhance user engagement.
##Client-Centric Approach
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**Drupal Development **
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1,910,387 | Common Software Architecture patterns in Mobile Application Development. | Architecture refers to a set of techniques that are used to combine the different parts of a software... | 0 | 2024-07-03T16:01:27 | https://dev.to/ericomartin/common-software-architecture-patterns-in-mobile-application-development-14e1 | mobile, android, hng |
Architecture refers to a set of techniques that are used to combine the different parts of a software application. It can be defined as the internal structure of a software application. It describes how different software components communicate with each other to process input and produce output to the user. A mobile application is a software application that is designed to be used on a mobile device. Mobile application architecture is a combination of models and techniques used to build a mobile application ecosystem. There are many software architecture patterns, however there are peculiar ones that are more suitable for mobile applications.
**Major Components of a Mobile App**
The major components within a mobile application are the basic building blocks upon which application architecture can be designed. These components act as multiple layers that communicate with each other through which data passes on to trigger different functionalities within the mobile ecosystem. Both IOS and Android, which are the two main Mobile Operating Systems, use this pattern.
The three main components of a mobile app are:
- Presentation Layer
- Business Layer
- Data Layer
**Presentation Layer**
The Presentation layer defines how an application is presented to the end user. It is a user interface and communication layer where the user can interact with the application. Every mobile device has a screen and this is the component that displays information to the user. It is also known as the frontend of an application.
The main purpose of the presentation layer is to take the data sent by the business layer and display it in a way the user understands.
**Business Layer**
The business layer is the logic behind which the application operates. It instructs the application on what functions it should exhibit. It often takes user input or raw data from the data layer, processes it, then sends it to the presentation layer. Examples of functions of this layer include logging, authentication/ authorization, data caching, security, data validation, and exception management.
**Data Layer**
The data layer is an intermediary between the business layer, presentation layer and external resources. Its main purpose is to obtain raw data from various sources (such as a database, cloud server, or an API). This layer consists of various components like service agents, data access components, data utilities, to enable data transactions within an app.
**Architectural Patterns**
Examples of Architectural patterns include:
- Model-View-Presenter (MVP)
- Model-View-Controller (MVC)
- Model-View-ViewModel (MVVM)
- VIPER (View, Interactor, Presenter, Entity, Router)
**Model-View-Presenter**
This is an architecture that consists of the three major components of a mobile application. The model which is the data layer and it manages the business logic and data. The View is the presentation layer which displays information to the user. The Presenter is a component that handles user actions and updates the view with data from the model layer.
**Pros:**
- Better separation of concerns compared to MVC.
- Easier to test because the Presenter can be tested independently of the Android framework.
**Cons:**
- Can lead to complex Presenter logic.
- More boilerplate code compared to MVC.
**Model-View-Controller**
In this architecture the Model represents the business logic and user data. The View handles presentation of data to the user. The Controller handles the user input and interacts with the model to update the view. The purpose of this architecture is to separate business logic from presentation logic which allows the code to be more readable, debuggable and easy to update.
**Pros:**
- Separation of concerns.
- Easy to understand and implement.
**Cons:**
- Can lead to bloated controllers.
- Not suitable for complex applications with heavy UI logic.
**Model-View-ViewModel**
This architecture is the recommended architecture by Android. It is also used in native IOS development for mobile devices. It separates the application into three parts which are Model, View, and ViewModel. The Model is concerned with managing data and business logic. The View handles presentation logic binding view properties to the data exposed by the ViewModel while the ViewModel interfaces between the Model and the View, which contains the reference logic.
**Pros:**
- Clear separation of concerns.
- Facilitates data binding.
- Easier to test compared to MVC and MVP.
**Cons:**
- Requires understanding of data binding frameworks.
**VIPER (View, Interactor, Presenter, Entity, Router)**
This is an architecture pattern that separates the app's functionalities into five distinct components namely View, Interactor, Presenter, Entity and Router.
The View displays the presenter information while user input to the presenter. The Interactor handles the business logic. The Presenter gets data from the interactor and sends it to the view for display. The Entity is the business model that describes the entities to be used by the interactor. The Router handles how data is navigated within the application.
**Pros:**
- Promotes clean architecture with a clear separation of concerns.
- Each component has a single responsibility.
**Cons:**
- Can be complex to set up and maintain.
- May introduce a lot of boilerplate code.
**Conclusion**
In conclusion Model-View-ViewModel is the most commonly used architectural pattern in mobile application development. Also it is the recommended architecture for Android mobile applications by Google.
As an intern at the ongoing cohort of the HNG 11 internship I hope to refresh my technical skills in the art of crafting reliable, durable and testable software applications that can be used to solve real world problems. Given my background in software development I hope to make a mark by skilling up through this great initiative and also to give back by helping others solve their problems through software development. You can check out the program [here](https://hng.tech/internship). There is also a premium version of the internship where you get exclusive benefits and a certificate you can see [here]( https://hng.tech/premium) for the premium version.
| ericomartin |
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1,906,427 | [DAY 69-71] I started building a calculator using React and I failed | Hi everyone! Welcome back to another blog where I document the things I learned in web development. I... | 27,380 | 2024-07-03T16:00:00 | https://dev.to/thomascansino/day-69-71-i-started-building-a-calculator-using-react-and-i-failed-4dkj | buildinpublic, react, javascript, webdev | Hi everyone! Welcome back to another blog where I document the things I learned in web development. I do this because it helps retain the information and concepts as it is some sort of an active recall.
On days 69-71, after deploying 2 react apps which are the random quote machine and markdown previewer to github pages. As well as started the build of the 3rd project in the front end course which is a drum machine...
I continued finalizing the design of the program as well as its functions in React.
I wanted to make the design look visually appealing so I started by looking up good color palettes on coolors.co and once I found one, I slightly changed the shade of the generated colors to match my preference.
Next, I also wanted to make the app look futuristic and modern.
I know, I tried my best.
Next, I deployed the app to github pages.
After that, I moved on to start building the 4th project in the front end course which is a basic javascript calculator.
What I did first is to write the HTML of the calculator by making container divs for the display and buttons.
Next is designing the calculator using CSS. I made certain designs for the number buttons, clear button, operator buttons, and the equal button. After that, I added functions to handle clicks for certain buttons.
For the number and operator buttons, it will basically display what you click on the calculator. This part is not finished yet since there are still some bugs encountered like the operators can be clicked consecutively, improper handling of float numbers, and decimals not functioning properly, which we do not want.
I also designed the container divs for the display part of the calculator so that the user will be able to see the current input of the program.
The reason why I failed is because I did not reach the deadline that I set for myself. I was supposed to finish this program by this week but I did not expect it would take me longer to program the app. I’m currently 3/4ths of the way there and I plan to continue this project by next week. It’s okay. Things happen and even if I didn’t finish the app yet, I still learned so much by just starting to build it and for me, that’s what matters the most.
Anyways, that’s all for now, more updates in my next blog! See you there!
| thomascansino |
1,908,410 | Refactor: GoroutineTracker with unnecessary usage of reflect | Today, I encountered this code in my company codebase (the code and comments are rewritten for demo... | 0 | 2024-07-03T16:00:00 | https://olivernguyen.io/w/go.tracker/ | go, coding, refactoring, programming |
Today, I encountered this code in my company codebase _(the code and comments are rewritten for demo purpose and do not include any proprietary code)_:
```go
type GoroutineTracker struct {
wg sync.WaitGroup
// ... some other fields
}
// Go starts a new goroutine and tracks it with some metrics.
func (g *GoroutineTracker) Go(ctx context.Context, name string, f any, args ...any) {
fn := reflect.TypeOf(f)
if fn.Kind() != reflect.Func { panic("must be function") }
if fn.NumIn() != len(args) { panic("args does not match fn signature") }
if fn.NumOut() > 0 { panic("output from fn is ignored") }
g.wg.Add(1)
id := g.startCaptureTime()
go func() {
defer func() {
r := recover()
// ... some panic handling code
g.wg.Done()
g.endCaptureTime(id)
}()
input := typez.MapFunc(args, func(arg any) reflect.Value {
return reflect.ValueOf(arg)
})
_ = reflect.ValueOf(f).Call(input)
}()
}
// Wait for all goroutines to finished.
func (g *GoroutineTracker) Wait() { g.wg.Wait() }
```
The `GoroutineTracker` is used for tracking usage of goroutines in the codebase, for example, number of goroutines, time taken by each goroutine, etc. The `Go` method is used to start a new goroutine and track it. The `Wait` method is used to wait for all goroutines to finish.
Example of usage:
```go
g := NewGoroutineTracker()
g.Go(ctx, "task1", doTask1, arg1, arg2)
g.Go(ctx, "task2", doTask2, arg3)
g.Wait()
```
## Problem: The usage of reflect is unnecessary and can be avoided
Well, that code works, but it uses the [reflect](https://pkg.go.dev/reflect) package to check the function signature then call the function. It's totally unnecessary, and we can avoid it by changing the usage to:
```go
g := NewGoroutineTracker()
g.Go(ctx, "task1", func() error {
return doTask1(arg1, arg2)
})
g.Go(ctx, "task2", func() error {
return doTask2(arg3)
})
```
The new code will be simpler and has many benefits:
- **Type safety**: No need to check the function signature using reflect. The compiler will do it for us. The original code has potential runtime errors if the function signature does not match the arguments.
- **Error handling**: We can return an error from the function and handle it in the caller. The original code ignores the output of the function.
- **Readability**: The new code is more readable and easier to understand. We can see the function signature and arguments directly in the code.
## A better implementation of GoroutineTracker
Here is the refactored code:
```go
func (g *GoroutineTracker) Go(ctx context.Context, fn func() error) {
g.wg.Add(1)
id := g.startCaptureTime()
go func() (err error) {
defer func() {
r := recover()
// capture returned error and panic
g.endCaptureTime(id, r, err)
g.wg.Done()
}()
// just call the function, no reflect needed
return fn()
}()
}
```
## Wait for all goroutines to finish before shutting down
Another use case for `GoroutineTracker` is for waiting all goroutines to finish before shutting down the application. So we can have 2 types of waiting:
- **In a function**: Waiting for all local goroutines to finish.
- **When application shutdown**: Waiting for all goroutines that started by any `GoroutineTracker` to finish.
We can implement it by adding a global tracker and making any tracker register its function to the global tracker:
```go
type GlobalTracker struct {
wg sync.WaitGroup
// ... some other fields
}
type GoroutineTracker struct {
parent *GlobalTracker
wg sync.WaitGroup
// ... some other fields
}
func (g *GlobalTracker) New() *GoroutineTracker {
return &GoroutineTracker{parent: g}
}
func (g *GoroutineTracker) Go(ctx context.Context, fn func() error) {
g.wg.Add(1) // use both parent and local wg
g.parent.wg.Add(1) // to track the new goroutine
id := g.startCaptureTime()
go func() (err error) {
defer func() {
// ...
g.endCaptureTime(id, r, err)
g.wg.Done()
g.parent.wg.Done()
}()
return fn()
}()
}
func (g *GlobalTracker) WaitForAll() { g.wg.Wait() }
func (g *GoroutineTracker) Wait() { g.wg.Wait() }
```
And we can use `WaitForAll()` to wait for all goroutines to finish before shutting down the application:
```go
type FooService {
tracker *GlobalTracker
// ... some other fields
}
func (s *FooService) DoSomething(ctx context.Context) {
g := s.tracker.New()
g.Go(ctx, func() error { return s.doTask1(arg1, arg2) })
g.Go(ctx, func() error { return s.doTask2(arg3) })
g.Wait() // wait for local goroutines, this is optional
}
func main() {
// some initialization, then start the application
globalTracker := &GlobalTracker{}
fooService := FooService{tracker: globalTracker, /*...*/}
application.Start()
// wait for all goroutines to finish before shutting down
<-application.Done()
globalTracker.Wait()
}
```
## Conclusion
In conclusion, while the original implementation of `GoroutineTracker` works and can track goroutines, its use of the [reflect](https://pkg.go.dev/reflect) package to dynamically check and call functions introduces unnecessary complexity and potential runtime errors. By refactoring the code to directly accept function literals, we achieve improved type safety, streamlined error handling, and enhanced readability. This approach leverages Go's compiler-checked type system to ensure compatibility between function signatures and arguments, resulting in more robust and maintainable code. By adopting these changes, we optimize the `GoroutineTracker` for clarity and reliability, aligning with best practices in Go programming.
---
## Author
_I'm [Oliver Nguyen](https://olivernguyen.io/). A software maker working mostly in Go and JavaScript. I enjoy learning and seeing a better version of myself each day. Occasionally spin off new open source projects. Share knowledge and thoughts during my journey._
| olvrng |
1,910,390 | How to Scrape Carsandbids.com | Discover how to extract important information on cars on Carsandbids.com. Learn from basics to expert-level of scraping cars before your next purchase. Dive in. | 0 | 2024-07-03T15:59:17 | https://crawlbase.com/blog/scrape-carsandbids/ | scrapecarsandbids, carsandbids, scrapecars | ---
title: How to Scrape Carsandbids.com
published: true
description: Discover how to extract important information on cars on Carsandbids.com. Learn from basics to expert-level of scraping cars before your next purchase. Dive in.
tags: scrapecarsandbids, carsandbids, scrapecars
cover_image: https://crawlbase.com/blog/scrape-carsandbids/scrape-carsandbids-og.jpg
canonical_url: https://crawlbase.com/blog/scrape-carsandbids/
# Use a ratio of 100:42 for best results.
# published_at: 2024-07-03 15:37 +0000
---
This blog was originally posted to [Crawlbase Blog](https://crawlbase.com/blog/scrape-carsandbids/?utm_source=dev.to&utm_medium=referral&utm_campaign=content_distribution)
Like many other transactions, buying or selling a vehicle is a major decision for most people. Carsandbids.com is a popular platform that enables you to buy or sell a car through auctions. However, like most eCommerce platforms, surfing through many web pages before arriving at your choice can be challenging.
<!-- more -->
[Crawlbase's Crawling API](https://crawlbase.com/crawling-api-avoid-captchas-blocks 'Crawlbase Crawling API')
Web scraping is a great way of collecting data from websites. When you want to analyze market trends, get detailed information about vehicles or watch auction results, it becomes a good idea to scrape data from sites like Carsandbids.com.
In this blog, we will guide you through scraping Carsandbids.com using Python. You'll learn how to set up your environment, understand the website's structure, and extract data efficiently.
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- **Competitive Analysis**: Investigate auction results to understand trends on the market and competition as well.
- **Enhanced Research**: Use collected data into deep studies about car depreciation, buyer preferences, and other automotive trends.
- **Automated Monitoring**: Keep an eye on particular car listings as well as their outcomes at auctions without doing it manually.
### Key Data Points of Carsandbids.com
Scraping Carsandbids.com allows you to collect a variety of detailed information:
### 1. Vehicle Information:
- **Make and Model**: Identify the car's manufacturer and specific model.
- **Year**: Determine the manufacturing year of the car.
- **Mileage**: Gather data on how many miles the car has been driven.
- **Condition**: Learn about the car’s current state, including any notable defects or issues.
- **Specifications**: Obtain detailed specs such as engine type, horsepower, transmission, and more.
### 2. Auction Details:
- **Starting Price**: The initial price set for the auction.
- **Current Bid**: The highest bid at any given moment.
- **Number of Bids**: Track how many bids have been placed.
- **Auction End Time**: Know when the auction will conclude.
- **Auction History**: Review past auctions to see the final sale price and bidding history.
### 3. Seller Information:
- **Seller Profile**: Basic information about the seller.
- **Ratings and Reviews**: Insights into the seller’s reputation based on previous transactions.
### 4. Historical Data:
- **Past Auction Results**: Data on previous sales, including final sale prices and auction dates.
- **Bidding Patterns**: Analysis of how bids were placed over time during past auctions.
### 5. Descriptions and Photos:
- **Vehicle Descriptions**: Detailed descriptions provided by sellers.
- **Photos**: Images of the car from various angles to show its condition and features.
Scraping Carsandbids.com with Crawlbase’s Crawling API makes this process efficient and effective, allowing you to gather and analyze data seamlessly. Next, we are going to talk about tools and libraries required to scrape Carsandbids.com.
## Tools and Libraries Needed
To scrape Carsandbids.com efficiently you will need to set up your environment and install a few essential libraries. Here’s how to go about it.
### Setting Up Your Environment
1. **Install Python**: Make sure that Python has been installed in your system. It can be downloaded from the [official Python website](https://www.python.org/downloads/ 'Download Python').
2. **Create a Virtual Environment**: It’s always good practice to have a virtual environment for managing your project dependencies. Head on over to your terminal window and type in the following commands:
```bash
python -m venv carsandbids-scraper
# On macOS/Linux
source carsandbids-scraper/bin/activate
# On Windows
.\carsandbids-scraper\Scripts\activate
```
3. **Choose an IDE**: Opt for an IDE or code editor where you’ll write your scripts. Common choices include [PyCharm](https://www.jetbrains.com/pycharm/ 'PyCharm'), [Visual Studio Code,](https://code.visualstudio.com/ 'VS COde'), and [Sublime Text](https://www.sublimetext.com/ 'Sublime Text').
### nstalling Necessary Libraries
Once the setup is complete, we shall then need to install the necessary libraries. Open up your terminal window and run the following command:
```bash
pip install requests beautifulsoup4 json
pip install crawlbase
```
Here's a brief overview of these libraries:
- **requests**: A simple HTTP library for making requests to websites.
- **beautifulsoup4**: A library for parsing HTML and extracting data from web pages.
- **json**: A library for handling JSON data.
- **crawlbase**: The library for interacting with the Crawlbase products to scrape websites.
Once you have these packages and libraries ready, it’s scraping time. In the following portions we will explore the structure of the site as well as how to use Crawlbase Crawling API to extract data from it.
## Understanding Carsandbids.com Structure
To be able to scrape Carsandbids.com effectively, you should know how its web pages are structured. In this part, we will look at the search results page and product page main components.
### Overview of the Search Results Page
Each listing typically includes:
- **Vehicle Title**: The make and model of the car.
- **Thumbnail Image**: A small image of the vehicle.
- **Auction Details**: Information such as current bid, time remaining, and number of bids.
- **Link to Product Page**: A URL that directs to the detailed product page for each car.
Understanding these elements will help you target specific data points when scraping the search results.
### Overview of the Product Page
Key elements include:
- **Vehicle Description**: Detailed information about the car’s make, model, year, mileage, condition, and specifications.
- **Image Gallery**: Multiple images showcasing different aspects of the vehicle.
- **Auction Details**: Information such as starting price, current bid, bid history, and auction end time.
- **Seller Information**: Details about the seller, including their profile and any ratings or reviews.
- **Additional Details**: Any extra information provided by the seller, including vehicle history, maintenance records, and modifications.
By familiarizing yourself with the structure of these pages, you can plan your scraping strategy effectively. In the next section, we’ll discuss using Crawlbase’s Crawling API to extract data from these pages.
## Using Crawlbase Crawling API
[Crawlbase's Crawling API](https://crawlbase.com/crawling-api-avoid-captchas-blocks 'Crawlbase Crawling API') is a robust tool that simplifies web scraping. The subsequent section will introduce the API and guide you in setting it up for scraping Carsandbids.com.
### Introduction to Crawlbase Crawling API
The Crawlbase Crawling API is one of the [best web crawling tools](https://crawlbase.com/blog/best-web-crawling-tools/ 'best web crawling tools') designed to handle complex web scraping scenarios like Carsandbids.com dynamic web pages. It provides a simplified way to access web content while bypassing common challenges such as JavaScript rendering, CAPTCHAs, and anti-scraping measures.
[IP rotation](https://crawlbase.com/blog/rotating-ip-address/ 'IP rotation') is one outstanding feature of Crawlbase Crawling API. By rotating IP addresses, it makes sure your scrape requests appear from different places that make it harder for websites to detect and block scrapers.
With Crawlbase Crawling API, you can send requests to websites and get structured data back. Using it’s [parameters](https://crawlbase.com/docs/crawling-api/parameters/ 'Crawling API Parameters'), you can takes care of rendering JavaScript, processing dynamic content, and returning parsed html content.
### Setting Up Crawlbase Crawling API
1. **Sign Up and Get API Token**: First, sign up for an account at [Crawlbase](https://crawlbase.com/signup 'Crawlbase') and get your API Token. This key is necessary for authenticating your requests.
**Note**: Crawlbase offers two varieties of tokens that is normal token (TCP) for static websites and JavaScript token (JS) for dynamic or JavaScript-driven sites. Carsandbids.com heavily relies on JavaScript to load its pages dynamically, thus we will go with the JavaScript token. For a smooth start, first 1,000 requests to the Crawling API are free. No credit card required.
2. **Initialize the API**: Import `CrawlingAPI` from [Crawlbase](https://crawlbase.com/signup 'Crawlbase') Python library and use your API Token to initialize the Crawlbase Crawling API in your Python script. Here’s a basic example:
```python
from crawlbase import CrawlingAPI
# Initialize Crawlbase API with your access token
crawling_api = CrawlingAPI({ 'token': 'YOUR_CRAWLBASE_TOKEN' })
```
3. **Making a Request**: Create a function to make requests to the Crawlbase API. Below is a sample function to scrape a search results page:
```python
def make_crawlbase_request(url):
response = crawling_api.get(url)
if response['headers']['pc_status'] == '200':
html_content = response['body'].decode('utf-8')
return html_content
else:
print(f"Failed to fetch the page. Crawlbase status code: {response['headers']['pc_status']}")
return None
```
In the next sections, we’ll cover scraping the search results page and the product page in detail.
## Scraping the Search Results Page
Scraping the search results page of Carsandbids.com involves extracting details about multiple car listings. This section will guide you through the process step-by-step, complete with code examples.
### Step 1: Analyze the Search Results Page
Before writing any code, understand the structure of the search results page.
Identify the HTML elements containing the data you want to extract, such as vehicle titles, thumbnails, auction details, and links to product pages.
### Step 2: Set Up Your Python Script
Create a new Python script and import the necessary libraries and a function to make request using Crawling API as below:
```python
import json
from crawlbase import CrawlingAPI
from bs4 import BeautifulSoup
# Initialize Crawlbase API with your access token
crawling_api = CrawlingAPI({ 'token': 'CRAWLBASE_JS_TOKEN' })
# Function to make a request using Crawlbase API
def make_crawlbase_request(url, options):
response = crawling_api.get(url, options)
if response['headers']['pc_status'] == '200':
html_content = response['body'].decode('utf-8')
return html_content
else:
print(f"Failed to fetch the page. Crawlbase status code: {response['headers']['pc_status']}")
return None
```
### Step 3: Parse and Extract Data
Parse the HTML content using BeautifulSoup and extract the relevant data. Here’s a function to extract vehicle auction titles, subtitles, location, thumbnails, and links to product pages:
```python
# Function to scrape search results page
def scrape_search_results_page(html_content):
soup = BeautifulSoup(html_content, 'html.parser')
car_listings = soup.find_all('li', class_='auction-item')
extracted_data = []
for listing in car_listings:
auction_title = listing.find('div', class_='auction-title').text.strip() if listing.find('div', class_='auction-title') else None
auction_sub_title = listing.find('p', class_='auction-subtitle').text.strip() if listing.find('p', class_='auction-subtitle') else None
auction_location = listing.find('p', class_='auction-loc').text.strip() if listing.find('p', class_='auction-loc') else None
thumbnail = listing.find('img')['src'] if listing.find('img') else None
product_page_link = 'https://www.carsandbids.com' + listing.find('a')['href'] if listing.find('a') else None
extracted_data.append({
'title': auction_title,
'sub_title': auction_sub_title,
'auction_location': auction_location,
'thumbnail': thumbnail,
'product_page_link': product_page_link
})
return extracted_data
```
### Step 4: Save the Extracted Data
Write a function to save the extracted data to a JSON file for future use:
```python
# Function to save data to a JSON file
def save_data_as_json(data, filename):
with open(filename, 'w') as file:
json.dump(data, file, indent=2)
print(f"Data saved to {filename}")
```
### Step 5: Running the Script
Create a `main` function and define the URL of the search results page, output file name, and set the options for the Crawling API request. Call this function to start scraping Carsandbids.com SERP:
```python
# Main function
def main():
SEARCH_RESULTS_URL = 'https://carsandbids.com/search/bmw'
OUTPUT_FILE = 'search_results.json'
options = {
'ajax_wait': 'true',
'page_wait': 10000
}
# Fetch the search results page
search_results_html = make_crawlbase_request(SEARCH_RESULTS_URL, options)
if search_results_html:
# Scrape the search results page
extracted_data = scrape_search_results_page(search_results_html)
# Save the extracted data to a JSON file
save_data_as_json(extracted_data, OUTPUT_FILE)
else:
print("No data to parse.")
if __name__ == '__main__':
main()
```
### Complete Script
Here’s the complete script to scrape the search results page of Carsandbids.com:
```python
import json
from crawlbase import CrawlingAPI
from bs4 import BeautifulSoup
# Initialize Crawlbase API with your access token
crawling_api = CrawlingAPI({ 'token': 'CRAWLBASE_JS_TOKEN' })
# Function to make a request using Crawlbase API
def make_crawlbase_request(url, options):
response = crawling_api.get(url, options)
if response['headers']['pc_status'] == '200':
html_content = response['body'].decode('utf-8')
return html_content
else:
print(f"Failed to fetch the page. Crawlbase status code: {response['headers']['pc_status']}")
return None
# Function to scrape search results page
def scrape_search_results_page(html_content):
soup = BeautifulSoup(html_content, 'html.parser')
car_listings = soup.find_all('li', class_='auction-item')
extracted_data = []
for listing in car_listings:
auction_title = listing.find('div', class_='auction-title').text.strip() if listing.find('div', class_='auction-title') else None
auction_sub_title = listing.find('p', class_='auction-subtitle').text.strip() if listing.find('p', class_='auction-subtitle') else None
auction_location = listing.find('p', class_='auction-loc').text.strip() if listing.find('p', class_='auction-loc') else None
thumbnail = listing.find('img')['src'] if listing.find('img') else None
product_page_link = 'https://www.carsandbids.com' + listing.find('a')['href'] if listing.find('a') else None
extracted_data.append({
'title': auction_title,
'sub_title': auction_sub_title,
'auction_location': auction_location,
'thumbnail': thumbnail,
'product_page_link': product_page_link
})
return extracted_data
# Function to save data to a JSON file
def save_data_as_json(data, filename):
with open(filename, 'w') as file:
json.dump(data, file, indent=2)
print(f"Data saved to {filename}")
# Main function
def main():
SEARCH_RESULTS_URL = 'https://carsandbids.com/search/bmw'
OUTPUT_FILE = 'search_results.json'
options = {
'ajax_wait': 'true',
'page_wait': 10000
}
# Fetch the search results page
search_results_html = make_crawlbase_request(SEARCH_RESULTS_URL, options)
if search_results_html:
# Scrape the search results page
extracted_data = scrape_search_results_page(search_results_html)
# Save the extracted data to a JSON file
save_data_as_json(extracted_data, OUTPUT_FILE)
else:
print("No data to parse.")
if __name__ == '__main__':
main()
```
Example Output:
```json
[
{
"title": "2014 BMW 335i SedanWatch",
"sub_title": "No Reserve Turbo 6-Cylinder, M Sport Package, California-Owned, Some Modifications",
"auction_location": "Los Angeles, CA 90068",
"thumbnail": "https://media.carsandbids.com/cdn-cgi/image/width=768,quality=70/9004500a220bf3a3d455d15ee052cf8c332606f8/photos/rkVPlNqQ-SRn59u8Hl5-(edit).jpg?t=171849884215",
"product_page_link": "https://www.carsandbids.com/auctions/9QxJ8nV7/2014-bmw-335i-sedan"
},
{
"title": "2009 BMW 328i Sports WagonWatch",
"sub_title": "No ReserveInspected 3.0-Liter 6-Cylinder, Premium Package, California-Owned",
"auction_location": "San Diego, CA 92120",
"thumbnail": "https://media.carsandbids.com/cdn-cgi/image/width=768,quality=70/9004500a220bf3a3d455d15ee052cf8c332606f8/photos/3g6kOmG9-2vaWrBd1Zk-(edit).jpg?t=171863907176",
"product_page_link": "https://www.carsandbids.com/auctions/30n7Yqaj/2009-bmw-328i-sports-wagon"
},
{
"title": "2011 BMW M3 Sedan Competition PackageWatch",
"sub_title": "No Reserve V8 Power, Rod Bearings Replaced, Highly Equipped, M Performance Exhaust",
"auction_location": "Wilmette, IL 60091",
"thumbnail": "https://media.carsandbids.com/cdn-cgi/image/width=768,quality=70/c7387fa5557775cb743f87fc02d6cb831afb20b2/photos/3Bp4zzbX-hgZKuFy-Ka-(edit).jpg?t=171869247233",
"product_page_link": "https://www.carsandbids.com/auctions/9lBB4mxM/2011-bmw-m3-sedan-competition-package"
},
{
"title": "2001 BMW 740iWatch",
"sub_title": "No Reserve V8 Power, M Sport Package, Orient Blue Metallic",
"auction_location": "Penfield, NY 14526",
"thumbnail": "https://media.carsandbids.com/cdn-cgi/image/width=768,quality=70/4822e9034b0b6b357b3f73fabdfc10e586c36f68/photos/9XY2zVwq-wu-H4HvpOL-(edit).jpg?t=171881586626",
"product_page_link": "https://www.carsandbids.com/auctions/9eDymNqk/2001-bmw-740i"
},
.... more
]
```
In the next section, we will cover how to scrape the product pages in detail.
## Scraping the Product Page
Scraping the product page of Carsandbids.com involves extracting detailed information about individual car listings. This section will guide you through the process, complete with code examples.
### Step 1: Analyze the Product Page
Before writing any code, examine the structure of a product page.
Identify the HTML elements containing the data you want to extract, such as vehicle descriptions, image galleries, auction details, and seller information.
### Step 2: Set Up Your Python Script
Create a new Python script or add to your existing script and import the necessary libraries and a function to make request using Crawling API as below:
```python
import json
from crawlbase import CrawlingAPI
from bs4 import BeautifulSoup
# Initialize Crawlbase API with your access token
crawling_api = CrawlingAPI({ 'token': 'CRAWLBASE_JS_TOKEN' })
# Function to make a request using Crawlbase API
def make_crawlbase_request(url, options):
response = crawling_api.get(url, options)
if response['headers']['pc_status'] == '200':
html_content = response['body'].decode('utf-8')
return html_content
else:
print(f"Failed to fetch the page. Crawlbase status code: {response['headers']['pc_status']}")
return None
```
### Step 3: Parse and Extract Data
Parse the HTML content using BeautifulSoup and extract the relevant data. Here’s a function to extract vehicle descriptions, image galleries, and auction details:
```python
# Function to scrape the product page
def scrape_product_page(url, options):
product_page_html = make_crawlbase_request(url, options)
if product_page_html:
soup = BeautifulSoup(product_page_html, 'html.parser')
title_price_tag = soup.select_one('div.auction-title > h1')
vehicle_description = {}
quick_facts = soup.find('div', class_='quick-facts')
if quick_facts:
for dl in quick_facts.find_all('dl'):
for dt, dd in zip(dl.find_all('dt'), dl.find_all('dd')):
key = dt.text.strip()
value = dd.text.strip() if dd else None
vehicle_description[key] = value
image_gallery = {
"interior_images": [img['src'] for img in soup.select('div[class*="gall-int"] > img')],
"exterior_images": [img['src'] for img in soup.select('div[class*="gall-ext"] > img')]
}
current_bid_tag = soup.select_one('div.current-bid > div.bid-value')
bid_history = [bid.text.strip() for bid in soup.select('.comments dl.placed-bid')]
seller_info_link = soup.select_one('ul.stats li.seller div.username a')
seller_info = {
'username': seller_info_link['title'] if seller_info_link else None,
'profile': 'https://carsandbids.com' + seller_info_link['href'] if seller_info_link else None,
}
product_data = {
'auction_title': title_price_tag.text.strip() if title_price_tag else None,
'vehicle_description': vehicle_description,
'image_gallery': image_gallery,
'current_bid': current_bid_tag.text.strip() if current_bid_tag else None,
'bid_history': bid_history,
'seller_info': seller_info
}
return product_data
else:
print("No data to parse.")
```
### Step 4: Save the Extracted Data
Write a function ton save the extracted data to a JSON file for future use:
```python
// Function to save json data
def save_data_as_json(json, output_file):
with open(output_file, 'w') as file:
json.dump(json, file, indent=2)
print(f"Data saved to {output_file}")
```
### Step 5: Running the Script
Create a `main` function where you will define the URL of a product page, set the options for the Crawlbase Crawling API request, output file name, and combine the scraping and saving functions. Run the `main` function to scrape Carsandbids.com product page data:
```python
# Main function to run the script
def main():
PRODUCT_PAGE_URL = 'https://carsandbids.com/auctions/9QxJ8nV7/2014-bmw-335i-sedan'
OUTPUT_FILE = 'product_data.json'
options = {
'ajax_wait': 'true',
'page_wait': 10000
}
scraped_data = scrape_product_page(PRODUCT_PAGE_URL, options)
save_data_as_json(scraped_data, OUTPUT_FILE)
if __name__ == '__main__':
main()
```
### Complete Script
Here’s the complete script to scrape the product page of Carsandbids.com:
```python
import json
from crawlbase import CrawlingAPI
from bs4 import BeautifulSoup
# Initialize Crawlbase API with your access token
crawling_api = CrawlingAPI({ 'token': 'CRAWLBASE_JS_TOKEN' })
# Function to make a request using Crawlbase API
def make_crawlbase_request(url, options):
response = crawling_api.get(url, options)
if response['headers']['pc_status'] == '200':
html_content = response['body'].decode('utf-8')
return html_content
else:
print(f"Failed to fetch the page. Crawlbase status code: {response['headers']['pc_status']}")
return None
# Function to scrape the product page
def scrape_product_page(url, options):
product_page_html = make_crawlbase_request(url, options)
if product_page_html:
soup = BeautifulSoup(product_page_html, 'html.parser')
title_price_tag = soup.select_one('div.auction-title > h1')
vehicle_description = {}
quick_facts = soup.find('div', class_='quick-facts')
if quick_facts:
for dl in quick_facts.find_all('dl'):
for dt, dd in zip(dl.find_all('dt'), dl.find_all('dd')):
key = dt.text.strip()
value = dd.text.strip() if dd else None
vehicle_description[key] = value
image_gallery = {
"interior_images": [img['src'] for img in soup.select('div[class*="gall-int"] > img')],
"exterior_images": [img['src'] for img in soup.select('div[class*="gall-ext"] > img')]
}
current_bid_tag = soup.select_one('div.current-bid > div.bid-value')
bid_history = [bid.text.strip() for bid in soup.select('.comments dl.placed-bid')]
seller_info_link = soup.select_one('ul.stats li.seller div.username a')
seller_info = {
'username': seller_info_link['title'] if seller_info_link else None,
'profile': 'https://carsandbids.com' + seller_info_link['href'] if seller_info_link else None,
}
product_data = {
'auction_title': title_price_tag.text.strip() if title_price_tag else None,
'vehicle_description': vehicle_description,
'image_gallery': image_gallery,
'current_bid': current_bid_tag.text.strip() if current_bid_tag else None,
'bid_history': bid_history,
'seller_info': seller_info
}
return product_data
else:
print("No data to parse.")
def save_data_as_json(json, output_file):
with open(output_file, 'w') as file:
json.dump(json, file, indent=2)
print(f"Data saved to {output_file}")
# Main function to run the script
def main():
PRODUCT_PAGE_URL = 'https://carsandbids.com/auctions/9QxJ8nV7/2014-bmw-335i-sedan'
OUTPUT_FILE = 'product_data.json'
options = {
'ajax_wait': 'true',
'page_wait': 10000
}
scraped_data = scrape_product_page(PRODUCT_PAGE_URL, options)
save_data_as_json(scraped_data, OUTPUT_FILE)
if __name__ == '__main__':
main()
```
Example Output:
```json
{
"auction_title": "2014 BMW 335i Sedan",
"vehicle_description": {
"Make": "BMW",
"Model": "3 SeriesSave",
"Mileage": "84,100",
"VIN": "WBA3A9G52ENS65011",
"Title Status": "Clean (CA)",
"Location": "Los Angeles, CA 90068",
"Seller": "Miko_TContact",
"Engine": "3.0L Turbocharged I6",
"Drivetrain": "Rear-wheel drive",
"Transmission": "Automatic (8-Speed)",
"Body Style": "Sedan",
"Exterior Color": "Mineral Gray Metallic",
"Interior Color": "Coral Red",
"Seller Type": "Private Party"
},
"image_gallery": {
"interior_images": [
"https://media.carsandbids.com/cdn-cgi/image/width=542,quality=70/9004500a220bf3a3d455d15ee052cf8c332606f8/photos/rkVPlNqQ-IWpiLVYg8b-(edit).jpg?t=171849901125",
"https://media.carsandbids.com/cdn-cgi/image/width=542,quality=70/c1f0085c8fc8474dacc9711b49a8a8e8a1e02ed4/photos/rkVPlNqQ-56nXtS7MymS.jpg?t=171813663392",
"https://media.carsandbids.com/cdn-cgi/image/width=542,quality=70/c1f0085c8fc8474dacc9711b49a8a8e8a1e02ed4/photos/rkVPlNqQ-p1ZA2VO1lXd.jpg?t=171813664799"
],
"exterior_images": [
"https://media.carsandbids.com/cdn-cgi/image/width=542,quality=70/9004500a220bf3a3d455d15ee052cf8c332606f8/photos/rkVPlNqQ-cpo8coEnKk-(edit).jpg?t=171849888829",
"https://media.carsandbids.com/cdn-cgi/image/width=542,quality=70/9004500a220bf3a3d455d15ee052cf8c332606f8/photos/rkVPlNqQ-YF2_STjmrZ-(edit).jpg?t=171849886705",
"https://media.carsandbids.com/cdn-cgi/image/width=542,quality=70/9004500a220bf3a3d455d15ee052cf8c332606f8/photos/rkVPlNqQ-VQMbPK9FCO-(edit).jpg?t=171849894077",
"https://media.carsandbids.com/cdn-cgi/image/width=542,quality=70/9004500a220bf3a3d455d15ee052cf8c332606f8/photos/rkVPlNqQ-iqru8ZckuN-(edit).jpg?t=171849896490"
]
},
"current_bid": "$9,500",
"bid_history": [
"Bid$9,500",
"Bid$9,201",
"Bid$9,100",
"Bid$9,000",
"Bid$8,900",
"Bid$8,800",
"Bid$8,600",
"Bid$8,500",
"Bid$8,100",
"Bid$7,950",
"Bid$7,850"
],
"seller_info": {
"username": "Miko_T",
"profile": "https://carsandbids.com/user/Miko_T"
}
}
```
## Scrape Carsandbids Efficiently with Crawlbase (Final Thoughts)
Analyzing Carsandbids.com can reveal interesting observations about the auto market, giving more detailed insights regarding vehicle listings, auctions, and seller data. Using the [Crawlbase Crawling API](https://crawlbase.com/crawling-api-avoid-captchas-blocks 'Crawlbase Crawling API') makes it easy and efficient to scrape important information from the Carsandbids site. Follow the steps in this blog in order to successfully scrape both search results and product pages of Carsandbids site.
If you're looking to expand your web scraping capabilities, consider exploring our following guides on scraping other important websites.
📜 [How to Scrape Google Finance](https://crawlbase.com/blog/how-to-scrape-google-finance/ 'Scrape Google Finance')
📜 [How to Scrape Google News](https://crawlbase.com/blog/how-to-scrape-google-news/ 'Scrape Google News')
📜 [How to Scrape Google Scholar Results](https://crawlbase.com/blog/scrape-google-scholar-results/ 'Scrape Google Scholar Results')
📜 [How to Scrape Google Search Results](https://crawlbase.com/blog/scrape-google-search-pages/ 'Scrape Google Search Results')
📜 [How to Scrape Google Maps](https://crawlbase.com/blog/scrape-data-from-google-maps/ 'Scrape Google Maps')
📜 [How to Scrape Yahoo Finance](https://crawlbase.com/blog/scrape-yahoo-finance/ 'Scrape Yahoo Finance')
📜 [How to Scrape Zillow](https://crawlbase.com/blog/scrape-zillow/ 'Scrape Zillow')
If you have any questions or feedback, our [support team](https://crawlbase.com/dashboard/support 'Crawlbase Support') is always available to assist you on your web scraping journey. Happy Scraping!
## Frequently Asked Questions
### Q. Is scraping Carsandbids.com legal?
It is possible for scraping Carsandbids.com to be legal provided that you honor their terms of service and use the data responsibly. Watch out for actions that would violate these terms, such as crashing their servers or using the data maliciously. Always make sure your scraping activities are ethical and stay within legal limits to avoid any future problems.
### Q. What are the challenges in scraping Carsandbids.com?
Scraping Carsandbids.com has several difficulties. Carsandbids.com site has dynamic content which makes it difficult to scrape, and there may be rate limits imposed by a site on how many requests can be made within a set time period. Further, CAPTCHA systems can block automated scraping attempts. To navigate these hurdles effectively, use a reliable API like [Crawlbase Crawling API](https://crawlbase.com/crawling-api-avoid-captchas-blocks 'Crawlbase Crawling API') that manages dynamic contents as well as handles rate limitations and bypasses CAPTCHA protection.
### Q. How can I effectively use the data scraped from Carsandbids.com?
The information gotten from the website of Carsandbids could be quite valuable for various purposes. You can utilize it in market trends analysis, pricing monitoring of vehicles and competitive research purposes among others. This data may help one make informed decisions if he is either a car dealer who wants to price his vehicle competitively or an analyst studying market dynamics. Ensure you handle the data securely and use it to derive actionable insights that drive your strategies and business decisions.
| crawlbase |
1,910,388 | Locking Down Your Spring Boot Apps: A Deep Dive into Spring Security | Locking Down Your Spring Boot Apps: A Deep Dive into Spring Security Spring Boot, known... | 0 | 2024-07-03T15:57:05 | https://dev.to/virajlakshitha/locking-down-your-spring-boot-apps-a-deep-dive-into-spring-security-1b41 | 
# Locking Down Your Spring Boot Apps: A Deep Dive into Spring Security
Spring Boot, known for its rapid development capabilities, has become a go-to framework for building robust and scalable applications. However, with great power comes great responsibility – the responsibility to secure your applications and safeguard sensitive data. This is where Spring Security, a powerful and highly customizable authentication and authorization framework, steps in.
### Introduction to Spring Security
Spring Security is a framework that seamlessly integrates with Spring Boot to provide comprehensive security features. It offers a robust and flexible approach to securing your applications, allowing you to implement industry-standard security protocols and best practices with ease.
At its core, Spring Security operates on the principle of filters. These filters form a chain, intercepting incoming requests and performing security checks before allowing access to your application's resources. This filter-based architecture provides a granular level of control over how security is implemented, allowing you to tailor it to your application's specific needs.
### Key Features of Spring Security:
1. **Authentication:**
- Verifies the identity of users attempting to access your application.
- Supports a wide range of authentication mechanisms, including form-based login, basic authentication, OAuth 2.0, and LDAP.
2. **Authorization:**
- Determines what resources and actions a user is permitted to access after successful authentication.
- Provides role-based access control (RBAC) and fine-grained authorization mechanisms.
3. **Attack Prevention:**
- Includes built-in protection against common web vulnerabilities such as cross-site scripting (XSS) and cross-site request forgery (CSRF).
- Offers mechanisms to configure security headers for enhanced protection.
4. **Integration and Extensibility:**
- Seamlessly integrates with other Spring projects, such as Spring MVC and Spring WebFlux.
- Provides extension points for customizing security configurations and integrating with third-party security solutions.
### Use Cases: Securing Your Applications
Let's explore some real-world scenarios where Spring Security proves invaluable:
#### 1. Form-Based Authentication:
**Scenario:** You're building an e-commerce platform where users need to create accounts and log in to place orders.
**Solution:** Spring Security simplifies the implementation of form-based authentication. You can define login and registration forms, configure the authentication manager to validate user credentials against a database, and secure specific endpoints based on user roles (e.g., customers can view products, while administrators can manage inventory).
**Technical Insights:**
- Leverage Spring Security's `UsernamePasswordAuthenticationFilter` to intercept login requests.
- Utilize `UserDetailsService` to load user details from your database for authentication.
- Define access restrictions using annotations like `@PreAuthorize("hasRole('ROLE_ADMIN')")`.
#### 2. REST API Protection with JWT:
**Scenario:** You're developing a microservices architecture where communication between services occurs via REST APIs.
**Solution:** JSON Web Tokens (JWT) provide a stateless and secure mechanism for API authentication. Spring Security enables you to generate, validate, and authorize requests based on JWTs.
**Technical Insights:**
- Use Spring Security's `JwtAuthenticationFilter` to validate incoming JWTs.
- Implement a JWT provider to create and sign tokens during login.
- Configure authorization rules based on claims within the JWT.
#### 3. OAuth 2.0 for Social Login:
**Scenario:** You want to allow users to sign in using their existing social media accounts (e.g., Google, Facebook).
**Solution:** Spring Security integrates seamlessly with OAuth 2.0 providers, simplifying the implementation of social login functionality.
**Technical Insights:**
- Utilize Spring Security's OAuth 2.0 client support to initiate the authorization flow with the chosen provider.
- Configure a custom `OAuth2UserService` to retrieve user details from the provider after successful authentication.
- Map provider attributes to your application's user roles.
#### 4. Method-Level Security:
**Scenario:** You have a complex application with varying access levels within a single resource.
**Solution:** Spring Security's method-level security allows you to define fine-grained access control at the method level, ensuring that only authorized users can execute specific operations.
**Technical Insights:**
- Use annotations like `@PreAuthorize`, `@PostAuthorize`, and `@Secured` to define access restrictions on individual methods.
- Leverage Spring EL expressions within annotations for dynamic authorization rules.
#### 5. CSRF Protection:
**Scenario:** You want to protect your application from cross-site request forgery attacks, where malicious actors trick users into performing unwanted actions.
**Solution:** Spring Security provides built-in CSRF protection mechanisms to mitigate this vulnerability.
**Technical Insights:**
- Enable CSRF protection by including the `CsrfFilter` in your security filter chain.
- Configure the filter to require a CSRF token for state-changing requests.
- Include the CSRF token in forms using Spring Security's tag library.
### Comparison with Other Cloud Providers and Services:
While Spring Security is specific to the Spring ecosystem, other cloud providers offer security solutions:
- **AWS Cognito:** Provides user management, authentication, and authorization services.
- **Azure Active Directory:** Offers identity and access management capabilities.
- **Google Cloud Identity Platform:** Delivers user authentication, authorization, and single sign-on (SSO).
These services often integrate with popular frameworks and languages, providing alternatives for securing your applications.
### Conclusion:
Securing your Spring Boot applications is not just a best practice; it's essential for protecting sensitive data and maintaining user trust. Spring Security, with its comprehensive features, ease of use, and flexibility, empowers you to build secure and robust applications that meet the demands of today's digital landscape. By embracing the principles of authentication, authorization, and attack prevention, you can confidently deploy your Spring Boot applications, knowing that you've taken the necessary steps to safeguard your users and your data.
---
## Advanced Use Case: Building a Microservices Architecture with Spring Cloud and OAuth 2.0
**The Challenge:** Designing a secure and scalable microservices architecture for a financial application, ensuring that services can communicate securely while enforcing granular access control based on user roles.
**Solution:**
1. **Centralized Authentication and Authorization Server:** Implement an OAuth 2.0 authorization server using Spring Security OAuth2 Resource Server. This server will handle:
- User authentication (e.g., username/password, multi-factor authentication).
- Issuing access tokens with appropriate scopes and claims based on user roles.
2. **Resource Servers:**
- Each microservice acting as a resource server will integrate Spring Security OAuth2 Resource Server to validate incoming access tokens.
- Authorization decisions will be made based on token scopes and claims.
3. **API Gateway:**
- Implement an API gateway using Spring Cloud Gateway.
- The gateway will handle routing requests to appropriate microservices.
- It will also enforce authentication by validating access tokens before forwarding requests.
4. **Inter-Service Communication:**
- Microservices will communicate with each other using secured channels (e.g., HTTPS).
- For service-to-service authentication, consider using client certificates or propagating user context through access tokens.
**Key Considerations:**
- **Token Management:** Implement a robust token management strategy, including token expiration, refresh tokens, and revocation mechanisms.
- **Security Monitoring and Logging:** Integrate security information and event management (SIEM) tools to monitor security events and identify potential threats.
- **Data Protection:** Encrypt sensitive data at rest and in transit. Implement data masking and anonymization techniques where appropriate.
**Benefits:**
- **Centralized Security Management:** A single point of control for authentication and authorization.
- **Loose Coupling:** Microservices can evolve independently without impacting security configurations.
- **Scalability and Availability:** The architecture supports horizontal scaling and high availability for both the authorization server and resource servers.
**Tools and Technologies:**
- Spring Security OAuth2 Resource Server
- Spring Cloud Gateway
- Spring Cloud Config Server (for centralized configuration management)
- Hashicorp Vault (for secrets management)
- AWS Key Management Service (KMS) or similar (for encryption key management)
This architecture provides a robust foundation for building secure and scalable microservices-based applications, ensuring that only authorized users and services can access sensitive data and resources.
| virajlakshitha |
|
1,910,332 | Scripting Wizardry: Automating User and Group Creation Like a Pro | Introduction In the world of system administration, managing users and groups is a crucial... | 0 | 2024-07-03T15:56:48 | https://dev.to/oluwabammydu/scripting-wizardry-automating-user-and-group-creation-like-a-pro-41jo | linux, devops, bash, scripting | #Introduction
In the world of system administration, managing users and groups is a crucial task. As organizations grow, manually creating and maintaining user accounts and group memberships can become a tedious and error-prone process. Fortunately, Bash scripting provides a powerful solution to automate this process, saving time and ensuring consistency.
In this blog post, we will go through a bash script that streamlines user and group creation, and password generation. We'll break down the script section by section, explaining its functionality and the rationale behind the design choices.
#The Script Breakdown
### Shebang and Log/Password Paths
`#!/bin/bash` indicates that the script, named create_users.sh, should be run using bash.
The script starts by defining the paths for the log and password files. It then creates the necessary directories and files if they don't exist, setting appropriate permissions to ensure secure access.
```
#!/bin/bash
# Define the log and password file path
LOG_FILE="/var/log/user_management.log"
PASSWORD_FILE="/var/secure/user_passwords.txt"
#Ensure the necessary directories exist and set permissions
sudo mkdir -p /var/log
sudo mkdir -p /var/secure
# Create the log and password files if they do not exist and set permissions
sudo touch $LOG_FILE
sudo chmod 600 $LOG_FILE
sudo touch $PASSWORD_FILE
sudo chmod 600 $PASSWORD_FILE
```
### Input Validation
Before proceeding, the script checks if an input file containing user data is provided as an argument. If no file is provided, it exits with an error message, ensuring proper usage.
```
# Check if the input file is provided
if [ -z "$1" ]; then
echo "Error: Please provide a text file containing user data as an argument."
exit 1
fi
```
### Processing User Data
The script reads the input file line by line, where each line represents a user entry. It skips empty lines and extracts the usernames and groups from each line using a delimiter (in this case, a semicolon).
```
# Read the input file line by line
while IFS= read -r line; do
# Skip empty lines
[ -z "$line" ] && continue
```
### User and Group Creation
For each user, the script first checks if the user's personal group exists. If not, it creates the group. Then, it checks if the user already exists. If not, it creates the user account and assigns the personal group as the primary group.
```
# Extract username and groups
IFS=';' read -r username groups <<< "$line"
username=$(echo $username | xargs) # Trim whitespace
groups=$(echo $groups | xargs) # Trim whitespace
# Create the user's personal group if it doesn't exist
if ! getent group "$username" > /dev/null; then
groupadd "$username"
echo "$(date): Created group $username" >> $LOG_FILE
fi
# Create the user if it doesn't exist
if ! id -u "$username" > /dev/null 2>&1; then
useradd -m -g "$username" "$username"
echo "$(date): Created user $username" >> $LOG_FILE
fi
```
### Group Membership Management
The script parses the list of groups for each user, separated by commas. It checks if each group exists and creates it if necessary. Then, it adds the user to the specified groups using the `usermod` command.
```
# Add the user to the specified groups
IFS=',' read -ra group_array <<< "$groups"
for group in "${group_array[@]}"; do
group=$(echo $group | xargs) # Trim whitespace
if ! getent group "$group" > /dev/null; then
groupadd "$group"
echo "$(date): Created group $group" >> $LOG_FILE
fi
usermod -aG "$group" "$username"
echo "$(date): Added $username to group $group" >> $LOG_FILE
done
```
### Password Generation
For each user, the script generates a random password using the `openssl` command. It appends the username and password to the password file and sets the user's password using the `chpasswd` command.
```
# Generate a random password
password=$(openssl rand -base64 12)
echo "$username,$password" >> $PASSWORD_FILE
# Set the user's password
echo "$username:$password" | chpasswd
echo "$(date): Set password for $username" >> $LOG_FILE
```
### Home Directory Configuration and Logging
Finally, the script sets the appropriate permissions and ownership for the user's home directory, ensuring secure access.
Throughout the process, the script logs all operations performed, including user and group creation, password setting, and permission changes, along with timestamps. This logging mechanism provides a detailed audit trail and aids in troubleshooting.
```
# Set permissions and ownership for the home directory
chown -R "$username:$username" "/home/$username"
chmod 700 "/home/$username"
echo "$(date): Set permissions for /home/$username" >> $LOG_FILE
```
# How to Run the Script
* Create the users file with:
```nano users.txt```
Add your users and their groups in this format: user; groups
```
bammy; sudo,dev,www-data
john; sudo
doe; dev,www-data
jane; www-data
```
Save and exit the file with ctrl+o, followed by enter to save; then ctrl+x to exit.
* Make the script and file executable
```
chmod +x create_users.sh
chmod +x users.txt
```
* Run the script and pass the user file as an argument
```
sudo ./create_users.sh users.txt
```
#Conclusion
Automating user and group creation with Bash scripts can significantly streamline system administration tasks, reducing manual effort and ensuring consistency. The provided script offers a comprehensive solution for creating users and groups, generating passwords, and configuring home directories. By understanding the script's functionality and following best practices, you can leverage its power while maintaining a secure and efficient user management process.
This article is Task 2 in the DevOps track of the HNG Internship. To learn more about HNG, visit https://hng.tech/internship. | oluwabammydu |
1,910,386 | How AI in Finance Can Provide a Competitive Advantage in Risk Management | ` Banks spend millions of dollars on cloud-based technology for digital transformation to cut costs,... | 0 | 2024-07-03T15:55:17 | https://dev.to/christine_thomas_cf2c1bc1/how-ai-in-finance-can-provide-a-competitive-advantage-in-risk-management-3546 | risk, software, saas, finance | `<p>Banks spend millions of dollars on cloud-based technology for digital transformation to cut costs, acquire a competitive advantage, and improve customer experience. Many banks have succeeded via agility, data-driven decision-making, and meeting ROI goals. However, disasters also hit due to risk breaches, exposing a significant oversight: failure to consider risk and security during the digital transformation.</p>
<p>According to <a href="https://www.mckinsey.com/capabilities/mckinsey-digital/our-insights/lessons-from-banking-to-improve-risk-and-compliance-and-speed-up-digital-transformations">McKinsey</a>, a $200 million revenue boost from digital transformation pales compared to $300 million in fines for risk breaches. This scenario occurs regularly in several businesses. Companies focus on being quicker and more digital but subsequently face significant penalties for risk oversight and compliance violations.</p>
<p>The financial industry, which is tightly regulated, is frequently the most severely hit. Risks also affect manufacturing, retail, and healthcare sectors, emphasizing the importance of a balanced strategy prioritizing innovation and effective risk management.</p>
<h2>AI's Role in Mitigating Risks</h2>
<p>Implementing <a href="https://www.360factors.com/blog/generative-ai-banking-financial-services/?utm_source=guest_post&utm_medium=referral&utm_campaign=blog_page">AI in finance</a> revolutionizes risk management, with Generative AI (GenAI) pushing boundaries even further. <a href="https://www.mckinsey.com/capabilities/mckinsey-digital/our-insights/lessons-from-banking-to-improve-risk-and-compliance-and-speed-up-digital-transformations">McKinsey</a> predicts that by 2030, GenAI will substantially improve financial risk management, transforming processes by creating personalized experiences and innovative products. Unlike standard AI, which analyzes data for insights, GenAI generates new scenarios, making it easier to identify and prevent risks before they escalate.</p>
<p>A strong defense against financial crime is vital for banks facing stricter regulations and cyber threats. Organizations must also be mindful of “AI hallucinations”, such as misidentification, incorrect diagnosis, and errors due to operational commands, which could lead to harmful results for both property and life.</p>
<p><a href="https://www.mckinsey.com/industries/financial-services/our-insights/capturing-the-full-value-of-generative-ai-in-banking">McKinsey</a> estimates GenAI could contribute $200-$340 billion annually across industries, including banking. Despite potential risks like AI hallucinations, 70% of financial leaders believe the benefits outweigh the potential costs. By balancing GenAI's capabilities with risk monitoring, the implementation of AI in finance could enhance security and efficiency.</p>
<h2>5 Ways AI in Finance Revolutionizes Risk Management </h2>
<p>AI in risk mitigation is a significant game changer, shifting financial organizations from reacting to hazards to actively creating the landscape. Here's how AI in finance might transform essential risk functions:</p>
<h3>1. Identification of Fraud and Protection</h3>
<p>Fraud-related financial losses are increasing in the United States. McKinsey has reported a stunning 60% yearly increase since 2019. However, the devastation extends beyond the financial. Polls indicate a disturbing trend: 70% of those affected by fraud reported feeling frightened, stressed, or disturbed when alerted about probable fraud. This anxiety can decrease customer trust and motivation to utilize critical financial services.</p>
<p>Standard fraud detection systems struggle to accomplish two things:</p>
<ul>
<li><strong>Latest Fraud Plans: </strong>Standard systems fail to identify innovative and complex frauds.</li>
<li><strong>Digital Explosion: </strong>The sheer number of online transactions overpowers standard fraud detection systems.</li>
</ul>
<p>What was the result? Poor client experiences due to antiquated systems generating false positives.</p>
<p>AI-powered risk management software can enable enterprises to analyze data in real-time, enhancing their capabilities to detect suspicious transactions. AI/ML models can quickly generate notifications when suspicious values fall outside control limits to improve fraud detection capabilities.</p>
<h3>2. Mortgage Approval and Loan Processing</h3>
<p>AI transforms loan processing and mortgage approval, improving efficiency and security in crucial financial processes. AI models can be trained on realistic borrower profiles, improving risk assessment accuracy. It can then be used to automate document verification, eliminating the need for manual inspection and saving time.</p>
<p>Streamlined underwriting procedures result in quicker loan approvals, which increases borrower satisfaction. Machine learning algorithms also assist banks in detecting anomalies in loan applications, preventing identity theft and other kinds of fraud. In a dynamic threat landscape, banks that do not use AI and ML models would struggle to process applications rapidly while ensuring accuracy and authenticity. Financial firms integrating Gen AI can boost efficiency, minimize risk, and increase client happiness.</p>
<h3>3. Regulatory and Compliance Reporting</h3>
<p><a href="https://www.360factors.com/industry-solutions/financial-risk-compliance-management-software/?utm_source=guest_post&utm_medium=referral&utm_campaign=industry_page">AI in finance</a> transforms compliance testing and reporting by automating time-consuming regulatory processes, resulting in quicker and more accurate reporting. Gen AI generates plausible, fake data for testing, enabling organizations to securely assess their systems without exposing real client information.</p>
<p>AI bots can scan complex legal papers in seconds, enhancing compliance understanding and translating rules quickly. AI chatbots use Natural Language Processing (NLP) to provide real-time regulatory interpretation service. The result is simplified document understanding, targeted compliance training, and a forward-thinking approach to worldwide compliance.</p>
<h3>4. Predictive Analytics</h3>
<p> </p>
<p>Furthermore, asset optimization in receivables can be accomplished by analyzing payment behavior and industry performance, which aids creditworthiness evaluation and <a href="https://www.360factors.com/blog/five-steps-of-risk-management-process/?utm_source=guest_post&utm_medium=referral&utm_campaign=blog_page">risk management</a>. Predictive analytics also offers valuable information for individualized payment reminders and payment choices. While AI has tremendous potential for financial change, efficient risk management is critical for achieving ROI.</p>
<h3>5. Credit Risk Management</h3>
<p>Credit risk management is critical for multinational corporations with complicated borrower portfolios that span many languages, currencies, and parent company structures. A single defaulted loan or collateral failure might result in extreme financial difficulty, insolvency, or bankruptcy. Traditional credit risk management systems are sluggish and subjective, depending mainly on human procedures susceptible to mistakes, inconsistencies, and biases.</p>
<p>Such systems study limited data, resulting in imprecise risk evaluations and erroneous conclusions. Furthermore, these procedures are costly and time-consuming, which slows decision-making processes and reduces profitability.</p>
<p>According to McKinsey, underwriting automation through AI has reduced by 4% - 5% between 2021 and 2023. AI and machine learning replace traditional procedures, resulting in deeper borrower insights, better credit judgments, and more efficient operations. GenAI collects and analyzes credit data, evaluating default possibilities and providing real-time warnings based on exposure and market conditions.</p>
<h2>Conclusion</h2>
<p>AI is transforming risk management in finance, moving organizations from a reactive to a proactive stance. It excels at fraud detection, simplifies mortgage approval and loan processing, automates compliance reporting, improves predictive analytics, and changes credit risk management.</p>
<p>AI-based risk management solutions, such as <a href="https://www.360factors.com/enterprise-risk-management-software/?utm_source=guest_post&utm_medium=referral&utm_campaign=product_page">Predict360 Risk Management Software</a>, make it easier to evaluate risk data in real-time, increasing accuracy and efficiency while eliminating errors and false positives. Financial institutions can use AI-powered risk management solutions to improve productivity, reduce risks, and increase customer happiness, giving them a competitive advantage in the market. Effective risk management through AI is becoming critical to optimizing ROI and maintaining financial stability.</p>
<p> </p>
<p> </p>
`
| christine_thomas_cf2c1bc1 |