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1,913,455 | Cloudflare Launches Free Tool to Combat AI Bot Scraping | Introduction to Cloudflare’s Anti-AI Bot Tool Cloudflare’s new tool aims to tackle a... | 0 | 2024-07-06T06:23:20 | https://dev.to/hyscaler/cloudflare-launches-free-tool-to-combat-ai-bot-scraping-24ce | cloudflarechallenge, freetool, ai, webdev | ## Introduction to Cloudflare’s Anti-AI Bot Tool
Cloudflare’s new tool aims to tackle a growing problem: AI scrapers that harvest content from websites to train their models, often ignoring site owners’ preferences and protections. Cloudflare’s initiative represents a significant step towards enhancing the security and integrity of online content, especially in an era of rampant AI-driven data scraping.
## The Growing Concern of AI Bot Scraping
**The Problem with AI Bots**
AI bots have become increasingly sophisticated, and their ability to scrape data for training models has raised alarms among website owners. Unlike traditional web crawlers that follow rules outlined in a website’s robots.txt file, many AI bots disregard these directives. This practice is particularly problematic as it can lead to unauthorized usage of content, affecting both the security and intellectual property of the site owners.
**The Ineffectiveness of Current Measures**
While some AI vendors, such as Google, OpenAI, and Apple, provide mechanisms to block their bots from scraping data via robots.txt, compliance is not universal. Many AI scrapers continue to bypass these controls, creating a persistent challenge for website operators. The generative AI boom has exacerbated this issue, with the demand for high-quality training data driving unscrupulous bot activity.
**Cloudflare’s Solution to AI Bot Scraping**
Its new tool is specifically designed to counteract AI bots that scrape websites for data. By analyzing AI bot and crawler traffic, It has developed advanced models to detect and block unauthorized scraping attempts. This tool is offered free of charge, making it accessible to all websites hosted on Its platform.
**Key Features and Functionality**
**Automatic Bot Detection Models**: Cloudflare’s tool employs automatic bot detection models that analyze various factors, such as the behavior and appearance of web traffic, to identify AI bots. These models can distinguish between legitimate users and bots that attempt to mimic normal web browsing.
**Evasive Bot Identification**: The tool focuses on identifying bots that try to evade detection by using techniques to disguise their activity. By fingerprinting tools and frameworks used by these bots, Cloudflare can accurately flag and block traffic from malicious AI scrapers.
**Reporting and Manual Blacklisting**: Cloudflare has set up a reporting system for hosts to notify the company about suspected AI bots. This allows for continuous refinement of the detection models and manual blacklisting of persistent offenders.
## Benefits of Cloudflare’s Anti-AI Bot Tool
Cloudflare’s tool offers robust protection against AI bot scraping, ensuring that website content is not harvested without consent. This helps maintain the integrity of the site’s data and prevents unauthorized use by AI models.
Read the full blog by click on this link - https://hyscaler.com/insights/cloudflare-launches-free-tool/
| amulyakumar |
1,913,453 | 4 Killer Free AI Text-to-Speech Websites You Need to Try | Text-to-speech (TTS) technology has become increasingly popular among content creators and voiceover... | 0 | 2024-07-06T06:20:46 | https://dev.to/freeourdays/4-killer-free-ai-text-to-speech-websites-you-need-to-try-3cfj | Text-to-speech (TTS) technology has become increasingly popular among content creators and voiceover artists. While many professional voiceover platforms offer high-quality voices, their subscription fees can be quite expensive, especially for infrequent users.
However, with the rise of AI, many websites now offer free TTS services with impressive audio quality, rivaling even some paid software.
Here are a few user-friendly and completely free TTS websites worth exploring:
1. Tiktok AI Voice
● Description: This website allows you to convert text to speech for free, preview the results, and download the audio in MP3 format.
● Features: The homepage acts as the tool itself, making it incredibly easy to use. It supports 5 different voices with surprisingly good quality, almost devoid of any robotic sound. The character limit is 1000.
● Link: https://tiktokaivoice.top
2. Countik
● Description: Countik specializes in converting text to TikTok-style voices, which can be easily downloaded from your browser.
● Features: In addition to voice generation, it also offers music generation. However, it has a character limit of 300.
● Link: https://countik.com/tiktok-voice-generator
3. Ttsmaker
● Description: This is a free and versatile text-to-speech tool.
● Features: Ttsmaker supports multiple languages and has a limit of 2000 characters per conversion and 20,000 characters per week. While the voice quality isn't as natural as Tiktok AI Voice, it's more than sufficient for light use.
● Link: https://ttsmaker.com
4. Play.ht
● Description: Play.ht is a text-to-speech and AI voiceover tool.
● Features: It boasts support for a wider range of languages compared to the previous options. However, the voice quality is similar to Ttsmaker, with a noticeable robotic tone that lacks the naturalness of Tiktok AI Voice and Countik. It has a limit of 1000 characters per conversion.
● Link: https://play.ht/text-to-speech
Of course, there are many other free and paid TTS websites available. Feel free to share your recommendations in the comments!
Now, it's your turn! Don't forget to give this video a thumbs up, subscribe to my channel, and share it with your friends!
If you're even slightly interested in building your online presence, exploring freelance opportunities, diving into independent development, earning extra income, or simply pursuing a brighter future, subscribing to my channel might be a good idea. While I might not make you rich directly, connecting with like-minded individuals is always a win-win! Let's chase our dreams together! | freeourdays |
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1,913,438 | Converting bit of CPU to GPU : Rendering AI Models on CPU only | Hello Friends, Read this first: Slicing CPU as GPU (with... | 0 | 2024-07-06T06:17:42 | https://dev.to/manishfoodtechs/converting-bit-of-cpu-to-gpu-rendering-ai-models-on-cpu-only-22oh | aws, ai, devops, cloud | Hello Friends,
Read this first:
{% embed https://dev.to/manishfoodtechs/slicing-cpu-as-gpu-with-example-269o %}
### Exploring the Potential of LLVMpipe for AI Model Rendering
In the evolving landscape of technology, the demand for robust and flexible rendering solutions continues to grow, particularly in areas where access to GPU resources is limited. LLVMpipe, a Gallium3D driver that uses the CPU for rendering rather than the GPU, has emerged as a significant player in this space. While LLVMpipe is traditionally associated with graphics rendering, its potential applications in artificial intelligence (AI) model rendering are worth exploring. This essay examines the feasibility and benefits of utilizing LLVMpipe for AI model rendering, highlighting its advantages and limitations.
#### Understanding LLVMpipe
LLVMpipe operates as a software rasterizer within the Gallium3D framework, a part of the Mesa 3D Graphics Library. Unlike conventional drivers that leverage GPU capabilities, LLVMpipe uses the CPU to perform rendering tasks. It relies on the LLVM (Low-Level Virtual Machine) compiler infrastructure to generate optimized machine code for specific CPU architectures, enhancing performance and efficiency. This approach makes LLVMpipe a versatile tool for environments where GPU access is restricted or unavailable.
#### Feasibility of Using LLVMpipe for AI Model Rendering
1. **Compatibility and Accessibility**:
In scenarios where AI models are deployed in virtualized environments or on hardware without dedicated GPUs, LLVMpipe offers a viable alternative. By utilizing the CPU for rendering tasks, AI models can be executed in a wider range of environments, ensuring greater accessibility and flexibility.
2. **Performance Optimization**:
While GPUs are inherently more suited for the parallel processing demands of AI models, LLVMpipe can still provide optimized performance on modern multi-core CPUs. The LLVM infrastructure allows for the generation of highly efficient machine code, which can enhance the execution speed of AI models to some extent.
3. **Resource Utilization**:
In virtualized or cloud environments, balancing resource utilization is crucial. Offloading rendering tasks to the CPU using LLVMpipe can prevent GPU bottlenecks and distribute workloads more evenly across the system. This can be particularly beneficial in environments with high concurrency or where GPU resources are shared among multiple users.
4. **Ease of Deployment**:
Deploying AI models often involves complex configurations and dependencies. LLVMpipe simplifies this process by eliminating the need for specialized GPU hardware or intricate setup procedures. This ease of deployment can accelerate the development and testing phases, especially in resource-constrained environments.
#### Benefits of LLVMpipe for AI Model Rendering
1. **Broad Deployment Scenarios**:
LLVMpipe enables the deployment of AI models in a variety of environments, including virtualized, cloud-based, and edge computing scenarios. This broad compatibility ensures that AI applications can be executed even in the absence of dedicated GPU resources.
2. **Cost Efficiency**:
By leveraging existing CPU resources, LLVMpipe can reduce the need for expensive GPU hardware. This cost efficiency is particularly advantageous for small and medium-sized enterprises (SMEs) and educational institutions that may have limited budgets for AI infrastructure.
3. **Enhanced Testing and Development**:
Developers can use LLVMpipe to test AI models in environments that closely mimic production scenarios where GPU access might be limited. This ensures that AI applications are robust and capable of operating under diverse conditions.
#### Limitations and Considerations
1. **Performance Trade-offs**:
Despite its advantages, LLVMpipe cannot match the raw computational power of GPUs for AI model rendering. AI models, particularly those involving deep learning and large-scale data processing, may experience slower execution times when relying solely on CPU-based rendering.
2. **Scalability Challenges**:
As the complexity and size of AI models increase, the limitations of CPU-based rendering become more pronounced. LLVMpipe may struggle to handle the demands of highly parallelized tasks that GPUs are designed to perform efficiently.
3. **Specialized Requirements**:
Certain AI applications may have specific requirements that are best met by GPU hardware. For instance, tasks involving real-time processing or large-scale neural networks may necessitate the use of GPUs to achieve optimal performance.
#### Conclusion
LLVMpipe offers a promising alternative for rendering AI models in environments where GPU access is limited or non-existent. Its compatibility, cost efficiency, and ease of deployment make it a valuable tool for a wide range of applications. However, it is essential to recognize the performance trade-offs and scalability challenges associated with CPU-based rendering. By carefully considering these factors, developers and organizations can leverage LLVMpipe to enhance the accessibility and flexibility of AI model deployment, ensuring that advanced AI capabilities are available across diverse environments. | manishfoodtechs |
1,913,437 | Discover Tranquility and Elegance at Lagoona London Salon & Spa in Mumbai | Located in the heart of Mumbai, Lagoona London Salon & Spa offers a serene oasis where luxury... | 0 | 2024-07-06T06:17:24 | https://dev.to/abitamim_patel_7a906eb289/discover-tranquility-and-elegance-at-lagoona-london-salon-spa-in-mumbai-38cm | Located in the heart of Mumbai, Lagoona London Salon & Spa offers a serene oasis where luxury meets tranquility. Whether you're a local resident or visiting the city, **[Lagoona London Salon & Spa](https://trakky.in/Mumbai/Boriwali%20West/salons/Lagoona-london-salon-spa-borivali-west)** promises a rejuvenating experience that combines exquisite service with a tranquil atmosphere.
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1,913,436 | Product Description: VRV | Introduction: Welcome to the future of immersive entertainment with VRV, your gateway to a world of... | 0 | 2024-07-06T06:15:55 | https://dev.to/svairtech/product-description-vrv-5hka | hvac | **Introduction**:
Welcome to the future of immersive entertainment with VRV, your gateway to a world of virtual reality experiences like never before. [VRV](https://svairtech.in) combines cutting-edge technology with user-friendly design to bring you a seamless and captivating journey into the realms of virtual reality. Whether you're a seasoned enthusiast or a curious newcomer, VRV promises to redefine your expectations of what's possible in digital entertainment.
**Key Features**:
Immersive Visuals: Dive into stunning virtual environments rendered in breathtaking detail. VRV delivers high-definition visuals that transport you to other worlds with lifelike realism.
360-degree Sound: Hear every detail with spatial audio that enhances immersion. VRV's advanced sound technology places you at the center of the action, whether you're exploring ancient ruins or battling futuristic foes.
Comfortable Design: Designed for extended use, VRV prioritizes comfort without compromising on performance. Adjustable straps, ergonomic padding, and lightweight materials ensure a snug fit for hours of uninterrupted play.
Intuitive Controls: Navigate virtual worlds effortlessly with intuitive controllers that respond to your every movement. Precision tracking and tactile feedback provide a natural and responsive gaming experience.
Expandable Storage: Never run out of space for your favorite games and experiences. VRV offers expandable storage options, allowing you to customize your library without limitations.
Multi-Platform Compatibility: Connect seamlessly with your favorite devices. VRV supports a wide range of platforms, including PC, console, and mobile, ensuring compatibility with your existing setup.
Social Integration: Stay connected with friends and fellow gamers through VRV's social features. Share experiences, join multiplayer games, and explore virtual worlds together from anywhere in the world.
Content Ecosystem: Discover a vast library of VR games, apps, and experiences curated for every interest and age group. From adrenaline-pumping adventures to educational simulations, VRV offers something for everyone.
**Specifications**:
Display: High-resolution OLED display for vibrant visuals
Field of View: Wide field of view for immersive experiences
Refresh Rate: Smooth refresh rates for fluid motion
Audio: Integrated spatial audio with 3D sound effects
Connectivity: Wi-Fi and Bluetooth connectivity options
Battery Life: Long-lasting battery for extended play sessions
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1,909,462 | Progressive Web Apps (PWA): A Comprehensive Guide | Did you know that your web apps built with HTML, CSS, JavaScript, or any front-end framework can... | 0 | 2024-07-06T06:14:23 | https://dev.to/udoka033/progressive-web-apps-pwa-a-comprehensive-guide-57ii | javascript, webdev, react, beginners | Did you know that your web apps built with HTML, CSS, JavaScript, or any front-end framework can become installable, and work offline providing an enhanced user experience?
This article will introduce progressive web apps to beginners, and anyone looking to improve their front-end development skills. In this article, you will learn;
- [Everything you need to start building Progressive Web Apps](#intro)
- [How to create installable web apps.](#installable)
- [How to implement offline functionality in Progressive Web Apps.](#offline)
- [How to analyze web performance, accessibility, SEO, etc.](#lighthouse)
- [Tips for improving app performance, load time, and user experience.](#tips)
**Prerequisite**: A basic knowledge of HTML and CSS is required for a full understanding of this article.
<h2 id="intro">What is a Progressive Web App?</h2>
A Progressive Web App (PWA) is a type of web application that combines the best features of traditional websites and native mobile apps. PWAs are designed to be fast, reliable, and engaging, providing a native app-like experience on the web.
## Why Progressive Web Apps?
The benefits of PWA include but are not limited to:
- **Improved Performance:** PWAs load faster and perform better, which can enhance user experience and engagement.
- **Offline Functionality:** With service workers, PWAs can cache web page content and function offline or in low-network conditions.
- **Increased Engagement:** Push notifications, and home screen installation, without the hassle of going to the app store increase user engagement and experience.
- **SEO Friendly:** PWAs are discoverable by search engines, improving visibility and reach.
- **Safe:** They are served via HTTPS to prevent snooping and ensure content hasn't been tampered with.
## Progressive Web App Examples
Many big companies such as [YouTube](https://www.youtube.com/), [Facebook](https://web.facebook.com/?_rdc=1&_rdr), and even [Dev.to](https://dev.to/) made their web apps progressive (installable). If viewing from a mobile browser, click on the three dots at the top right corner, then click Install or add to the home screen. From a desktop, click on the install icon at the top right corner of your browser as in the image below.
<h2 id="installable">How to Make Your Web Apps Installable</h2>
Whether you are building with Plain HTML, React, Vue, or any front-end framework, the steps of making your progressive web app installable are the same.
This PWA tutorial will take you through the steps.
**Step 1**: Set up your project.
HTML
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="style.css">
<title>PWA tutorial</title>
</head>
<body>
<section class="main">
<h1>Recipe App</h1>
<p>The best culinary treats</p>
<button>Explore</button>
</section>
</body>
</html>
```
CSS
```css
body{
background-color: aliceblue;
}
.main{
margin: 0 auto;
background-color: cadetblue;
text-align: center;
padding: 3rem;
}
h1{
font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
color: #fff;
font-size: 3rem;
}
button{
padding: 1rem 2rem;
color: darkcyan;
border:#fff;
background-color: #fff;
}
p{
color: #fff;
font-size: 1.6rem
}
```
Output
**Step 2**: Create a "Manifest.json" file. This step makes the app installable. The following details will make the splash screen of your application.
```json
{
"name": "Recipe Application",
"short_name": "My Recipes",
"description": "A recipe application for creating awesome recipes",
"start_url": "/",
"theme_color": "#000000",
"background_color": "#ffffff",
"display": "standalone",
"icons": [
{ "src": "./icon.png",
"sizes": "192x192",
"type": "image/png"
}]
}
```
Step 3- Link this manifest file to your HTML.
```html
<link rel="manifest" href="manifest.json"/>
```
Voila! your app is installable
**Splash screen**
This is the first screen that is displayed when the app is visited.
<h2 id="offline">Implementing Offline Feature in Progressive Web Apps</h2>
Offline capabilities in Progressive Web Apps enhance user experience. It ensures users enjoy the app with or without an internet connection. This is possible through service workers, background sync, [Caching](https://www.cloudflare.com/learning/cdn/what-is-caching/), etc.
A [service worker (SW)](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) intercepts network requests and gives responses from the cache when internet connection is not available.
While making your PWA offline, you can code the service worker manually or utilize tools like Workbox, [PWA Builder Online](https://www.pwabuilder.com/), PWA Studio, etc.
For this tutorial, [Workbox](https://developer.chrome.com/docs/workbox), owned by Google is the library of choice because it offers comprehensive features like precaching, background sync, push notifications, ease of use, etc.
### How to Integrate Workbox for Offline Functionality
**Step 1:** Install Workbox on the command line
Using "npx" ensures the latest version is always installed. If you are building with React.js, run "npm run build" before this step to generate a build folder (contains static files ready for deployment).
> npx workbox wizard
**Step 2:** Answer questions prompts from the Workbox wizard as in the image below.
For React.js projects, the **build** folder should serve as the root of the application.
**Step 3:** Generate the Service Worker file
> npx workbox generateSW workbox-config.js
**Step 4:** Paste this script code into your index.js file to register the SW. Ensure it is linked to your HTML document.
```js
if('serviceWorker' in navigator){
window.addEventListener('load', () =>{
navigator.serviceWorker.register('/sw.js')
})
}
```
**Step 5:** Deploy
Service workers require https:// to ensure security. Deploy the project to [Netlify](https://app.netlify.com/), or [Vercel](https://vercel.com/). View the web app on the browser.
<h2 id="lighthouse">How to Analyze Web App Performance, Accessibility, and SEO </h2>
Chrome [Lighthouse](https://chromewebstore.google.com/detail/lighthouse/blipmdconlkpinefehnmjammfjpmpbjk) is a powerful tool for this analysis. Analyzing web performance, accessibility, and SEO is crucial for building high-quality web apps that provide excellent user experience.
To perform this analysis:
- Open Chrome dev tools by right-clicking on your webpage.
- Click on Inspect, then navigate to Lighthouse tab
- On the tab click on mobile or desktop based on preference
- Generate Report
- Check Lighthouse Score
<h2 id="tips">Best Practices for PWA Performance Optimization</h2>
- Preload URLs and fonts that can slow the loading process of PWA.
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1,913,433 | Mattress Market Manufacturing Leaders' Insights | Mattress Market Introduction & Size Analysis: According to Persistence Market Research, the... | 0 | 2024-07-06T06:05:20 | https://dev.to/ganesh_dukare_34ce028bb7b/mattress-market-manufacturing-leaders-insights-22l | Mattress Market Introduction & Size Analysis:
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The mattress industry is expanding steadily, with global sales expected to increase substantially over the next few years. Over the next decade, mattress sales worldwide are projected to rise. Manufacturers will find East Asia to be a lucrative market, growing at a CAGR of over 7.8% until 2033.
The mattress market is characterized by a diverse array of manufacturing leaders who shape industry trends through innovation, quality, and market strategies.
_**Here’s a comprehensive overview of insights from some of the top manufacturing leaders in the mattress industry:**_
1. Tempur Sealy International, Inc.
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Consumer-Centric Approach: Emphasizes comfort, support, and therapeutic benefits in mattress design.
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JavaScript can only execute one piece of code at a time since it's single-threaded. So, how does it manage multiple tasks like making an HTTP request while updating the user interface? The secret is the Event Loop. In this article, we'll break down the event loop and show why it's so important in JavaScript.
**The Basics of the Event Loop**
To understand the event loop, let's start with the three main components that interact in JavaScript's concurrency model:
1. **Call Stack**: This is where your code gets executed. It operates on a Last In, First Out (LIFO) principle, meaning the last function that gets pushed onto the stack is the first one to be executed.
2. **Web APIs**: These are provided by the browser and include things like setTimeout, XMLHttpRequest, and DOM events. When you call one of these functions, the browser handles them outside of the main JavaScript thread.
3. **Callback Queue**: This is where the functions from the Web APIs go after they complete. They wait here to be executed once the call stack is clear.
**How It Works**
Here’s a step-by-step explanation of how the event loop works:
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Example in Action
Let’s see an example to make this clearer:
```
console.log('Start');
setTimeout(() => {
console.log('Timeout');
}, 2000);
console.log('End');
```
**Here’s what happens step-by-step:**
1. 'Start' is logged: The `console.log('Start')` is pushed to the call stack and executed.
2. `setTimeout` is called: The `setTimeout` function is pushed to the call stack, and the Web API sets a timer for 2000 milliseconds. After that, `setTimeout` is removed from the call stack.
3. 'End' is logged: The `console.log('End')` is pushed to the call stack and executed.
4. Timer expires: After 2000 milliseconds, the callback function from setTimeout is pushed to the callback queue.
5. Callback executed: The event loop sees the call stack is empty, so it moves the callback function from the callback queue to the call stack and executes it, logging 'Timeout'.
**Key Points to Remember**
- **Single-threaded**: JavaScript can only do one thing at a time.
- **Non-blocking**: Operations like I/O don’t block the main thread; instead, they use callbacks.
- **Event Loop**: It continuously checks the call stack and the callback queue to handle asynchronous operations.
**Why It Matters**
Understanding the event loop is crucial for writing efficient and responsive JavaScript applications. It helps you avoid common pitfalls like blocking the main thread and ensures your code can handle multiple tasks smoothly.
**Conclusion**
The event loop is a fundamental concept that enables JavaScript to be non-blocking and handle asynchronous operations effectively. By understanding how it works, you can write better, more efficient code and build applications that perform well under various conditions.
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1,913,428 | Crafting Excellence in Water Dispensers: Huizhou Watercoolers | The Huizhou Watercoolers: Perfecting The Art of Crafting Superior Quality in A Water Dispenser One... | 0 | 2024-07-06T05:51:43 | https://dev.to/francis_stonea_1cb94f585d/crafting-excellence-in-water-dispensers-huizhou-watercoolers-5gha | design | The Huizhou Watercoolers: Perfecting The Art of Crafting Superior Quality in A Water Dispenser
One of the most important resources for us process, is water. We need to have access to clean and safe drinking water on a daily basis. Water dispensers are the only source required to enure that we get enough supply of clean water all throughout. Huizhou Watercoolers appreciate bringing you the best water dispensers. And in this article, we will take a deep dive on the various advantages they have to offer and their bright innovations; as well talk about how Huizhou Watercoolers are designed with utmost safety measures while using quality service delivery.
Huizhou Watercoolers Advantages
When it comes to water dispensers, Huizhou Watercoolers is the first brand that now more and more popular in market. They provide numerous benefits in their Filter water dispenser products making them unique amongst the comprehensive market. Their water dispensers are designed to be energy-efficient - so you can save on electricity bills. Next, they make sure their products are eco-friendly so that minimal or no possible damage is caused to the environment. Two, the material that they use in building their water dispensers is resilient and strong to prevent damage or any sort of wear.
Huizhou Watercoolers Innovations
Their innovation sets them aside from the competitive crowd, which includes a mainstay brand in Huizhou Watercoolers. They always keep on innovating their products releasing new version and models of it making sure that we have the most advanced water dispensers market. Following on from touchless spouts, self-cleaning features and hot water locks, leading the market with innovative performance is Huizhou Watercoolers.
Safe with Huizhou Watercoolers
Safety: Safety is the very purpose of a water dispenser, and it has already taken lots of action in respect on this. They use Freestanding water dispenser materials that are BPA free so gives you the security to be safe. More than that, intelligent features avoid hot-water accidents, such as child lock in water dispensers for children safety.
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How Easy Can It Get To Run Huizhou Watercoolers To start, plug in the dispenser and choose an appropriate location for it. Fill the water tank again, and it will begin to dispense. With different models, consumers can choose to have hot and cold water supply. The Huizhou Watercoolers are rates so user friendly and also has a minimum maintenance score.
Top Quality Services Using Watercoolers Huizhou
Summary: Family focus and dedicated customer service at Huizhou Watercoolers Our expert team ensures to make the hasslefree solutions available for you with customer satisfaction, therefore tell us what you need and we provide it quickly. Additionally, both companies offer warranties and after-purchase services to ensure that their customers are getting the most bang for their buck.
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The options are so plenteous that you can easily use Huizhou Watercoolers in your homes, offices, schools and hospitals. The continuous flow of clean and safe drinking water from these offers is very useful to healthcare centers. Water dispensers helps in fostering a healthier lifestyle and keeps employees hydrated specially when working at offices.
To summarize about this water coolers review of best water dispensers is that HUZOU-WATER-COOLERS stands out to be one in all the simplest option within the field of Water dispesners. They offer a plethora of benefits, advanced attributes and great quality Filter water dispenser service. Flexible to use, suitable for different scenarios - Huizhou Watercoolers is a model example of an ambitious and well-established water dispensers brand. | francis_stonea_1cb94f585d |
1,913,427 | 10-Minute Guide to Building a Webhook Service with Sendhooks | Webhooks are a way of communicating between two systems via a network. They are often used as... | 0 | 2024-07-06T05:51:01 | https://dev.to/koladev/10-minute-guide-to-building-a-webhook-service-with-sendhooks-3lbm | go, docker, devops, opensource | [**Webhooks**](https://hookdeck.com/webhooks/guides/what-are-webhooks-how-they-work) are a way of communicating between two systems via a network. They are often used as notification systems, where a system can notify another about an event. So we can say that they are *event-driven*.
Coding a **webhook** engine is easy: coding an efficient webhook engine is another story.
I am working on a webhook engine called [Sendhooks](https://sendhooks.com/) written in Golang and today, we will explain how to use it to not worry about sending webhooks anymore.
## Requisites
The requisites for this article are not that high. Some experience with Docker and NGINX is recommended as we will mostly use them for simplicity. However, I will try my best to introduce those technologies.
Without further due, let's start with the project.
## The pains of webhooks
It is quite simple to build a **webhook** engine. It does not take much. You need to ensure that you can send data to a specific endpoint. To make the process non-blocking, we can use an asynchronous language or spawn a background task ( Django + Celery). However, when you start dealing with millions of webhooks to deliver, you want to use efficient technologies such as a much more powerful language with better concurrency management and powerful other tools.
The [**Sendhooks**](https://sendhooks.com/) engine is written in Golang to take advantage of goroutines, and interesting patterns to handle concurrency. As gateways to receive the data to be sent, we are using Redis, as it is much much faster and the Redis streams feature helps with reliability in case the receiver or the sendhooks engine is down for a few moments.
In the next section, I will introduce [Sendhooks](https://sendhooks.com/) by quickly discussing architecture.
## Using the Sendhooks Engine to Send Webhooks
[Sendhooks](https://sendhooks.com/) uses Redis Streams to read the data that needs to be sent to a specific URL. Redis is a fast and lightweight solution that is easy to set up on your local machine or Docker. One of the main advantages of Redis Streams is that they act as log records, which can be read by specific groups or users, providing a reliable way to manage data.
Typically, Redis stores data in the machine's memory, which poses a risk of data loss if the machine reboots. This makes Redis channels less suitable for webhooks when reliability is essential. In contrast, Redis Streams write data to a file on a disk and then load it into the machine's memory. This ensures that, even if the service goes down, the data can still be retrieved and used, maintaining reliability and continuity in data handling.
![Sendhooks process](https://cdn.hashnode.com/res/hashnode/image/upload/v1720169070547/81bc589e-fbf1-4e3f-a97d-0220f03efc5d.png align="center")
The data flow in Sendhooks begins with **Redis**, a fast and lightweight data store, which acts as the initial recipient of the data to be sent. From Redis, the data is seamlessly transferred to *Sendhooks*, an efficient and reliable webhook engine designed to handle high concurrency with ease. **Sendhooks** listens attentively for incoming data from Redis, ensuring that every piece of information is captured accurately. Once the data is received, **Sendhooks** processes it and promptly sends it to the specified **URL**.
This streamlined process ensures that data delivery is both reliable and efficient, leveraging the strengths of Redis and the advanced capabilities of *Sendhooks*.
### Data sent
The data sent to the Sendhooks engine follows a specific structure, ensuring that all necessary information is included for proper processing and delivery. Here is the detailed shape of the data:
```json
{
"url": "http://example.com/webhook",
"webhookId": "unique-webhook-id",
"messageId": "unique-message-id",
"data": {
"key1": "value1",
"key2": "value2"
},
"secretHash": "hash-value",
"metaData": {
"metaKey1": "metaValue1"
}
}
```
Let's describe the shape of the data:
* **url**: A string that specifies the endpoint where the webhook should be sent. For example, `"`[`http://example.com/webhook`](http://example.com/webhook)`"`.
* **webhookId**: A unique identifier for the webhook, represented as a string. This ensures that each webhook can be uniquely tracked and referenced.
* **messageId**: A unique identifier for the message being sent, also represented as a string. This helps in tracking individual messages within the webhook system.
* **data**: An object containing the main payload of the webhook. It includes key-value pairs where keys and values are strings. For example, `{ "key1": "value1", "key2": "value2" }`.
* **secretHash**: A string that represents a hash value used for security purposes. This ensures that the webhook data has not been tampered with and can be verified by the receiver.
* **metaData**: An object containing additional metadata about the webhook. It includes key-value pairs for extra information. For example, `{ "metaKey1": "metaValue1" }`.
This structure ensures that all necessary information is included, making the webhook processing efficient, secure, and reliable.
Now that we understand more about how Sendhooks works, let's focus on how integrate Sendhooks in an application.
## Integrating Sendhooks
In this section, we'll create a quick project using [Flask](https://flask.palletsprojects.com/en/3.0.x/) and Sendhooks. We'll use Docker to manage the connections between the services and to launch Redis, MongoDB, and the Sendhooks monitoring service.
First, in your working directory, create a new directory called `api`. Inside this directory, add the following files: `requirements.txt`, `Dockerfile`, and `app.py`.
```json
mkdir api
touch requirements.txt Dockerfile app.py
```
The `requirements.txt` file contains the libraries used in the Flask application. The `app.py` file will contain a code exposing an endpoint called `api/send` through Flask, so we can send a request to the API that will then contact the Sendhooks service via Redis. The `Dockerfile` contain instructions on building an image to run the flask service with docker.
In the next section, let's write the code for the Flask API.
### Writing the Flask API
In this section, we are going to write the code for the Flask API. We just need an endpoint accepting `POST` requests, that will use the payload received from the requests and send them to Redis.
Let's add the code :
```python
# api/app.py
from flask import Flask, request, jsonify
import redis
import json
app = Flask(__name__)
r = redis.Redis(host='redis', port=6379, db=0)
@app.route('/api/send', methods=['POST'])
def send_data():
payload = request.json
# Use xadd to add the message to the Redis Stream named 'hooks'
r.xadd('hooks', {'data': json.dumps(payload)})
return jsonify({"status": "sent to stream"})
if __name__ == '__main__':
app.run(debug=True, host='0.0.0.0')
```
Next, step let's add the content of the requirements.txt file. This file will be used by the Dockerfile to set up the Flask API service.
```plaintext
Flask
redis
```
Next, step, let's add the code of the `Dockerfile`.
```dockerfile
# Dockerfile.flask
FROM python:3.11-slim
WORKDIR /app
COPY . .
RUN pip install --no-cache-dir -r requirements.txt
CMD ["python", "app.py"]
```
Great! The Flask API is ready, now we can focus on adding the Sendhooks service and it just takes a few seconds.
### Adding Sendhooks
In this section, we will add the Sendhooks service in a docker-compose file. Now we are working at the root of the project, the same directory where the `api` directory is. Before doing that, we need a configuration file `config.json` for the service, but we will also need to write a `.env.local` file for the `sendhooks-monitoring` service.
Let's start with the `config.json` file.
```json
{
"redisAddress": "redis:6379",
"redisPassword": "",
"redisDb": "0",
"redisSsl": "false",
"redisStreamName": "hooks",
"redisStreamStatusName": "hooks-status"
}
```
The configuration parameters for Sendhooks are crucial but all are optional as default values are provided. Define these in the `config.json` file:
* **redisAddress**: Redis server address. Default is `127.0.0.1:6379`.
* **redisDb**: Redis database to use. Default is `0`.
* **redisPassword**: Optional password for accessing Redis. No default value.
* **redisSsl**: Enables/disables SSL/TLS. Default is `false`. If this parameter is `true`, you will need to add more [configuration](https://sendhooks.com/docs/installation#configuration-parameters).
* **redisStreamName**: Redis stream for webhook data. Default is `hooks`.
* **redisStreamStatusName**: Redis stream for status updates. Default is `sendhooks-status-updates`.
Next, let's create a file called `.env.local` and add the following content.
```plaintext
BACKEND_PORT=5002
MONGODB_URI=mongodb://mongo:27017/sendhooks
REDIS_HOST=redis
REDIS_PORT=6379
STREAM_KEY=hooks-status
ALLOWED_ORIGINS=http://localhost:3000
```
Great. With those files ready, we can now write the `docker-compose.yaml` file.
To set up a complete development environment for your Sendhooks project, you'll need a `docker-compose.yaml` file that defines and manages all necessary services. This Docker Compose file includes the following services:
* **Redis**: A fast, in-memory data store.
* **Mongo**: A NoSQL database for storing application data.
* **Sendhooks**: The primary service for sending webhooks.
* **Sendhooks-monitoring**: A monitoring service for tracking the status of webhooks.
* **Flask API**: A Flask-based API to interact with Sendhooks.
Here's the content of the `docker-compose.yaml` file:
```yaml
version: '3.9'
services:
redis:
image: redis:latest
hostname: redis
restart: always
ports:
- "6379:6379" # Expose Redis on localhost via port 6379
mongo:
image: mongo:latest
container_name: mongo
restart: always
volumes:
- ./mongo:/data/db # Persist Mongo data on the host
sendhooks:
image: transfa/sendhooks
restart: on-failure
depends_on:
- redis
volumes:
- ./config.json:/root/config.json # Mount config.json from host to container
flask-api:
build: ./api/
restart: on-failure
ports:
- "5001:5000" # Expose Flask API on localhost via port 5001, internal port 5000
depends_on:
- sendhooks
sendhooks-monitoring:
image: transfa/sendhooks-monitoring
container_name: sendhooks-monitoring
restart: on-failure
env_file:
- .env.local # Load environment variables from .env.local
ports:
- "5002:5002"
- "3000:3000" # Expose monitoring service on ports 5002 and 3000
depends_on:
- sendhooks
- mongo
- redis
```
Great! Now run the following command:
```bash
docker compose up -d --build
```
Once the services have started, we will mainly three web services:
* Navigate to [http://localhost:3000](http://localhost:3000) in your web browser to access the dashboard of sendhooks-monitoring.
* The backend of sendhooks-monitoring is available at [http://localhost:5002](http://localhost:5002).
* The Flask API is available at [http://localhost:5001](http://localhost:5001), and provides a RESTful interface for interacting with the system.
If you need a URL for testing the webhook service, you can get one for free here [https://webhook.site](https://webhook.site). It is however limited to 100 requests, but that should be sufficient for testing.
Whether you are using Postman, cURL, or any HTTP client or script, here is an example payload to use for sending:
```json
{
"url": "https://webhook.site/4654ee94-5d82-4b56-98fe-6bf1c7a6d735",
"webhookId": "webhook-12345",
"messageId": "message-67890",
"data": {
"order_id": "abc123",
"amount": "100.00",
"currency": "USD",
"status": "processed"
},
"secretHash": "e99a18c428cb38d5f260853678922e03",
"metaData": {
"ip_address": "192.168.1.1",
"user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64)"
}
}
```
After sending some webhooks, you should see them in the dashboard.
![](https://cdn.hashnode.com/res/hashnode/image/upload/v1720182305671/49d0cf74-8cba-4645-8aa9-dca0533b5320.png align="center")
Clicking on the ID of each will give you information about these webhooks.
![](https://cdn.hashnode.com/res/hashnode/image/upload/v1720182363949/4c28d2e1-00e2-4bd8-83b7-f0dabf5dac35.png align="center")
![](https://cdn.hashnode.com/res/hashnode/image/upload/v1720182375324/4b77fc88-3183-42b2-a159-f5defed367e9.png align="center")
🚀 You now know how to use the Sendhooks engine! The next section is optional but that might help you deploy the Sendhooks service with monitoring on a server.
## Deploying on a VPS using Docker, NGINX and Let's Encrypt
[NGINX](https://nginx.org/en/) is a high-performance web server and reverse proxy known for its stability, rich feature set, simple configuration, and low resource consumption. Let's Encrypt is a free, automated, and open certificate authority that provides SSL/TLS certificates to enable secure HTTPS connections for websites.
In this section, we'll guide you through setting up a quick project using Flask and Sendhooks. We'll use [Docker](https://www.docker.com/) to manage the connections between the services and to launch Redis, MongoDB, and the Sendhooks monitoring service. Additionally, we'll configure NGINX to handle incoming requests and secure the connections using Let's Encrypt.
### NGINX Configuration
In the root of the project, add the following NGINX configuration file (`nginx.conf`):
```nginx
upstream webapp {
server flask_api:5001;
}
upstream sendhooksmonitoring {
server sendhooks_monitoring:3000;
}
upstream sendhooksbackend {
server sendhooks_monitoring:5002;
}
server {
listen 443 ssl;
server_name API_DOMAIN MONITORING_DOMAIN BACKEND_DOMAIN;
server_tokens off;
client_max_body_size 20M;
# SSL configuration
ssl_certificate /etc/letsencrypt/live/API_DOMAIN/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/API_DOMAIN/privkey.pem;
ssl_trusted_certificate /etc/letsencrypt/live/API_DOMAIN/chain.pem;
ssl_dhparam /etc/letsencrypt/dhparams/dhparam.pem;
# Location blocks for different domains
location / {
if ($host = "API_DOMAIN") {
proxy_pass http://webapp;
}
if ($host = "MONITORING_DOMAIN") {
proxy_pass http://sendhooksmonitoring;
}
if ($host = "BACKEND_DOMAIN") {
proxy_pass http://sendhooksbackend;
}
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_redirect off;
}
}
```
### Explanation:
* **upstream blocks**: Define backend services (Flask API, Sendhooks Monitoring).
* **server block**: Configures the server to listen on port 443 with SSL enabled and sets up location blocks to handle requests based on the domain name.
### Docker Compose Configuration
Next, we'll update the `docker-compose.yaml` file to include all necessary services:
```yaml
version: '3.9'
services:
nginx:
container_name: nginx
restart: on-failure
image: jonasal/nginx-certbot:latest
environment:
- CERTBOT_EMAIL=YOUR_MAIL
- DHPARAM_SIZE=2048
- RSA_KEY_SIZE=2048
- ELLIPTIC_CURVE=secp256r1
- USE_ECDSA=0
- RENEWAL_INTERVAL=8d
volumes:
- nginx_secrets:/etc/letsencrypt
- ./nginx.conf:/etc/nginx/nginx.conf
- static_volume:/app/static
ports:
- "80:80"
- "443:443"
depends_on:
- flask-api
- sendhooks
- sendhooks-monitoring
redis:
image: redis:latest
hostname: redis
restart: always
ports:
- "6379:6379" # Expose Redis on localhost via port 6379
mongo:
image: mongo:latest
container_name: mongo
restart: always
volumes:
- ./mongo:/data/db
sendhooks:
image: transfa/sendhooks
restart: on-failure
depends_on:
- redis
volumes:
- ./config.json:/root/config.json # Mount config.json from host to container
flask-api:
build: ./api/
container_name: flask_api
restart: on-failure
ports:
- "5001:5000" # Expose Flask API on localhost via port 5001, internal port 5000
depends_on:
- sendhooks
sendhooks-monitoring:
image: transfa/sendhooks-monitoring
container_name: sendhooks_monitoring
restart: on-failure
env_file:
- .env.local # Load environment variables from .env.local
ports:
- "5002:5002"
- "3000:3000" # Expose monitoring service on ports 5002 and 3000
depends_on:
- sendhooks
- mongo
- redis
volumes:
nginx_secrets:
static_volume:
```
### Explanation:
* **nginx**: Uses `jonasal/nginx-certbot` image for NGINX with Let's Encrypt integration. It restarts on failure and depends on Flask API, Sendhooks, and Sendhooks Monitoring services.
* **environment**: Sets environment variables for Certbot configuration.
* **volumes**: Mounts volumes for SSL certificates and the NGINX configuration file.
* **ports**: Exposes ports 80 and 443 for HTTP and HTTPS traffic.
* **redis**: Runs a Redis server with automatic restart and port exposure.
* **mongo**: Runs a MongoDB server with data persistence.
* **sendhooks**: Runs the Sendhooks service with a mounted configuration file.
* **flask-api**: Builds and runs the Flask API, exposed on port 5001.
* **sendhooks-monitoring**: Runs the Sendhooks Monitoring service with environment variables loaded from `.env.local` and exposed on ports 5002 and 3000.
### Domain Configuration
After configuring the Docker services, link your server to a domain name by adding the necessary entries in your DNS configuration panel.
![](https://cdn.hashnode.com/res/hashnode/image/upload/v1720184002397/5e44c689-62e4-440c-8cef-6a7ea400c37b.png align="center")
Once the DNS configuration is done, you can start working on the deployment process.
Then, on your VPS just spin the services using the command `docker compose up -d --build` , and your Sendhooks infrastructure is deployed.🚀
## Conclusion
In this guide, we've shown how to set up and deploy a webhook engine using Sendhooks, along with supporting services like Redis, MongoDB, Flask, and Docker. We also covered securing the deployment with NGINX and Let's Encrypt.
By following these steps, you now have a scalable and secure webhook infrastructure in place. For more details and the complete code, visit the [repository](https://github.com/koladev32/sendhooks-exemple). | koladev |
1,913,426 | Home Healthcare Market: Top Trends and Innovations Shaping the Industry | The Home Healthcare Market analysis report by Persistence Market Research shows that global sales... | 0 | 2024-07-06T05:50:39 | https://dev.to/swara_353df25d291824ff9ee/home-healthcare-market-top-trends-and-innovations-shaping-the-industry-5eip |
The [Home Healthcare Market](https://www.persistencemarketresearch.com/market-research/home-healthcare-market.asp) analysis report by Persistence Market Research shows that global sales reached US$ 310.6 billion in 2021. With a projected CAGR of 16.3% from 2022 to 2032, the market is expected to reach US$ 1 trillion by 2032. Rehabilitation Therapy Services, the highest revenue-generating segment, is anticipated to grow at a CAGR of over 11.3% during this period. The global market in 2022 was valued at US$ 344.4 billion, with an expected CAGR of 11.5% from 2022 to 2032. In the U.S., the market is forecasted to grow at a CAGR of 11.6%. Key companies include Pediatric Home Healthcare, Interim Healthcare Inc., and Baxter International, Inc. Historically, from 2017 to 2021, the market value increased at a CAGR of 10.3%. The rise in demand is driven by increased awareness of specialized care at home, privacy concerns, personal care needs, and the promotion of health and treatment by professional caretakers.
**Key Trends in the Home Healthcare Market**
Telehealth and Remote Patient Monitoring
Telehealth Expansion: The adoption of telehealth has surged, providing patients with convenient access to healthcare professionals without the need for in-person visits. This trend has been accelerated by the COVID-19 pandemic, which highlighted the importance of remote healthcare services.
Remote Monitoring: Remote patient monitoring devices, such as wearable sensors and smart home health hubs, allow continuous tracking of vital signs and other health metrics. This real-time data enables healthcare providers to make timely interventions, improving patient outcomes.
Artificial Intelligence (AI) and Machine Learning
Predictive Analytics: AI and machine learning algorithms are being used to analyze health data, predict potential health issues, and recommend preventive measures. This proactive approach helps in early detection and management of chronic conditions.
Personalized Care Plans: AI-driven platforms can create customized care plans based on individual patient data, ensuring that care is tailored to specific needs and conditions.
Integration of IoT in Healthcare
Connected Health Devices: The Internet of Things (IoT) is enabling the integration of various health devices, creating a seamless ecosystem for health monitoring and management. Devices such as smart thermometers, blood pressure monitors, and glucose meters can communicate with each other and with healthcare providers.
Smart Homes: IoT-enabled smart homes equipped with health monitoring devices and emergency response systems provide a safe and supportive environment for elderly and chronically ill patients.
Wearable Health Technology
Fitness Trackers and Smartwatches: Wearable devices that monitor physical activity, heart rate, sleep patterns, and other health metrics are becoming increasingly popular. These devices empower patients to take an active role in managing their health.
Advanced Wearables: Newer wearables are capable of more sophisticated monitoring, such as detecting irregular heartbeats or tracking glucose levels, providing valuable data for managing chronic conditions.
Home Modifications and Assistive Technologies
Home Safety Enhancements: Modifications such as stairlifts, grab bars, and ramps improve home safety for elderly and disabled individuals, reducing the risk of falls and injuries.
Assistive Devices: Technologies like voice-activated assistants, automated medication dispensers, and smart home systems support independent living and improve the quality of life for patients.
Focus on Preventive Care
Preventive Health Programs: There is a growing emphasis on preventive care, with programs designed to educate patients on healthy lifestyle choices and preventive measures. These programs aim to reduce the incidence of chronic diseases and improve long-term health outcomes.
Health Coaching: Personalized health coaching, often delivered through digital platforms, helps patients adopt and maintain healthy behaviors, manage stress, and achieve their health goals.
**Innovations Shaping the Home Healthcare Market**
Virtual Reality (VR) and Augmented Reality (AR)
Rehabilitation and Therapy: VR and AR technologies are being used in rehabilitation and physical therapy, providing immersive and interactive exercises that improve patient engagement and outcomes.
Medical Training: These technologies also offer innovative solutions for training healthcare professionals, allowing them to practice procedures and treatments in a simulated environment.
Blockchain Technology
Secure Health Data: Blockchain is being explored for its potential to securely store and share health data, ensuring patient privacy and data integrity. This technology can streamline healthcare operations and improve patient trust.
Transparent Transactions: Blockchain can facilitate transparent and efficient transactions between healthcare providers, patients, and insurers, reducing administrative burdens and costs.
Genomic and Personalized Medicine
Genetic Testing: Advances in genetic testing allow for more precise diagnosis and personalized treatment plans based on an individual’s genetic makeup. This approach can improve the effectiveness of treatments and reduce adverse reactions.
Personalized Therapies: Personalized medicine involves tailoring medical treatment to the individual characteristics of each patient, leading to better health outcomes and more efficient use of healthcare resources.
3D Printing
Custom Medical Devices: 3D printing is being used to create custom prosthetics, orthotics, and other medical devices that are tailored to the specific needs of patients. This technology enhances the comfort and functionality of medical devices.
Surgical Models: 3D-printed models of patients’ anatomy are being used for surgical planning and training, improving the accuracy and success of complex procedures.
Biometric Authentication
Enhanced Security: Biometric authentication, such as fingerprint and facial recognition, is being used to secure access to health data and ensure that only authorized individuals can view or modify patient information.
Patient Identification: Biometric systems can improve patient identification, reducing errors in medication administration and other aspects of care.
**Conclusion**
The home healthcare market is at the forefront of a healthcare revolution, driven by technological advancements and innovative solutions that are reshaping the industry. These trends and innovations are enhancing the quality, accessibility, and efficiency of healthcare delivery, providing patients with personalized and proactive care in the comfort of their homes. As the market continues to evolve, it will play a critical role in the future of healthcare, improving patient outcomes and reducing overall healthcare costs.
| swara_353df25d291824ff9ee |
|
1,913,425 | ClusterIP - Kubernetes | ClusterIP --> The default service type, accessible only within the cluster. It's used for internal... | 0 | 2024-07-06T05:50:32 | https://dev.to/ibrahimsi/clusterip-kubernetes-3bbm | ibbus, k8sfull, clusterip, 40daysofkuberetes | ClusterIP --> The default service type, accessible only within the cluster. It's used for internal communication between services.
For example, communication between the front-end and back-end components of your application.
Create a 3 file
1. nginx-pod.yml
2. nginx-deployment.yml
3. nginx-svc.yml
```
apiVersion: v1
kind: Pod
metadata:
name: nginx-pod
spec:
containers:
- image: nginx
name: nginx-ctr
```
Execute the pod
```
kubectl apply -f nginx-pod.yml
kubectl get pods
```
Get the pod full details
```
kubectl get pods -o wide
```
Create a deployment file
```
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
spec:
replicas: 2
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- image: nginx
name: nginx-ctr
```
Execute the deployment file
```
kubectl apply -f nginx-deployment.yml
kubectl get pods
```
Create a service file
```
apiVersion: v1
kind: Service
metadata:
name: nginx-svc
spec:
selector:
app: nginx
ports:
- name: nginx-port
protocol: TCP
port: 32767
targetPort: 80
```
Get the full information on pods
```
kubectl get all
```
Get the pod IP address
```
kubectl get pods -o wide (or)
kubectl get endpoints
```
POD → 1
POD → 2
Login to the container and change the Nginx file
```
kubectl -it exec nginx-deployment-7bb9945d7c-75nc5 -- /bin/sh
```
Get the services IP
```
kubectl get svc
```
Automatically load balancing selected
- Accessible only within the cluster → ClusterIP → Internal load balancer.
- Cluster IP service identifies pods using the selector → How pods are identified.
- Target port helps in identifying pod port → how port is identified. | ibrahimsi |
1,913,424 | From Idea to Published Post: A Streamlined Content Workflow for Non-Technical Teams | Learn how to streamline your DevTool content creation process with AI. Discover how Doc-E.ai... | 0 | 2024-07-06T05:45:42 | https://dev.to/swati1267/from-idea-to-published-post-a-streamlined-content-workflow-for-non-technical-teams-57if | ## Learn how to streamline your DevTool content creation process with AI. Discover how Doc-E.ai can help you generate high-quality technical content, even if you're not a coder.
Have you ever stared at a blank screen, desperately trying to summon your inner technical genius to write a DevTool blog post? Do you find yourself caught in a never-ending cycle of drafts, edits, and approvals, only to end up with content that misses the mark?
If you're nodding along, you're not alone. Many DevTool marketing teams struggle to create high-quality technical content, especially when lacking in-depth technical expertise. But what if you could streamline your content workflow, reduce frustration, and consistently deliver content that resonates with developers?
Enter the world of AI-powered content creation. It's not just a buzzword; it's a game-changer that can empower your non-technical team to create engaging, informative, and accurate content with ease.
**The Content Creation Bottleneck**
Creating technical content presents a unique set of challenges for GTM teams:
- **Technical Knowledge Gap**: Your team might be marketing rockstars, but understanding complex technical concepts and explaining them clearly can be a hurdle.
- **Time Constraints**: You're juggling multiple projects, and finding time to research and write in-depth articles feels impossible.
- **Subject Matter Expert (SME) Availability**: Even if you have engineers willing to help, their time is often limited and divided among other priorities.
- **Iterations and Approvals**: The back-and-forth between writers, editors, and SMEs can be time-consuming and frustrating.
These roadblocks can lead to delays, missed deadlines, and ultimately, content that doesn't deliver the desired results.
**Enter Doc-E.ai: Your Content Creation Ally**
Doc-E.ai is an AI-powered platform designed to streamline the content creation process for DevTool teams. It can transform your chaotic workflow into a smooth, efficient machine.
Here's how it works:
1. **Capture Community Insights**: Doc-E.ai integrates with your Slack, Discord, or Discourse communities, capturing valuable discussions, questions, and answers.
2. **AI-Powered Analysis**: The platform's AI engine analyzes these conversations, identifying key topics, pain points, and frequently asked questions.
3. **Content Generation**: Doc-E.ai automatically generates draft articles, blog posts, or FAQs based on these insights.
4. **Human Review and Refinement**: Your team can easily review, edit, and fine-tune the AI-generated content to ensure accuracy, clarity, and adherence to your brand voice.
{% embed https://youtu.be/NWGLT4qgG-c?si=CxWoqpg9vWXjfm59 %}
**The Streamlined Workflow**
- Step 1: **Capture Community Discussions**: Doc-E.ai effortlessly captures all the valuable conversations happening within your developer community.
- Step 2: Identify Content Opportunities: Doc-E.ai analyzes these discussions,surfacing the most popular topics and questions.
- Step 3: **AI-Generated Drafts**: Doc-E.ai generates well-structured content drafts based on the identified insights.
- Step 4: **Human Review and Approval**: Your team reviews the drafts, adds their expertise, and finalizes the content.
- Step 5: **Publish and Promote**: Share your new, high-quality content with your audience and watch the engagement soar!
{% embed https://youtu.be/HvIzBADmyAQ?si=2waQp9IG6szmkzl8 %}
**Benefits of a Streamlined Workflow**
- **Increased Efficiency**: Say goodbye to endless drafts and revisions. Doc-E.ai speeds up content creation significantly.
- **Improved Quality**: AI ensures technical accuracy and clarity, while your team adds the human touch and expertise.
- **Data-Driven Content**: Create content that truly resonates with developers by leveraging real-world insights from your community.
- **Empowered Teams**: Non-technical team members can confidently create compelling technical content.
- **Scalability**: As your community grows, Doc-E.ai scales with you, helping you maintain a consistent content flow.
{% embed https://youtu.be/UXrnJRMmHzc?si=BabGWasyiACghPj6 %}
**Conclusion**
Don't let content creation be a bottleneck for your DevTool's growth. Embrace the power of AI-powered tools like Doc-E.ai to streamline your workflow, empower your team, and create high-quality technical content that resonates with developers and drives results.
Are you ready to transform your content creation process? Try Doc-E.ai for free today and experience the power of AI for yourself.
| swati1267 |
|
1,909,611 | How to Configure GitHub to Run Unit Tests Automatically | Introduction Setting up automated unit tests in GitHub can streamline your development... | 0 | 2024-07-06T05:43:59 | https://dev.to/olsido/how-to-configure-github-to-run-unit-tests-automatically-53a9 | # Introduction
Setting up automated unit tests in GitHub can streamline your development process, ensuring code quality and reliability. This guide demonstrates how to create a simple Java project with unit tests and configure GitHub Actions to run these tests automatically.
You can check out the GitHub repository used for this project here: [github-workflow-demo](https://github.com/olsido/github-workflow-demo).
# Creating a Project with Unit Tests
We will now create a simple Java project with a unit test. This will serve as the foundation for setting up automated unit testing in GitHub.
**Generate Code Using Spring Initializr:**
* Open IntelliJ IDEA.
* Go to File > New > Project.
* Select Spring Boot and configure your project (Group, Artifact, etc.).
* Choose "Spring Web" as a dependency.
* Click Create, and IntelliJ IDEA will generate the project code for you.
This project can be found at [github-workflow-demo](https://github.com/olsido/github-workflow-demo) GitHub repository.
Now we will "put some meat" into the project. Let's add a controller:
...and a unit test:
We will launch the application and see how it works. Right-click `GithubWorkflowDemoApplication` class and choose "Run 'GithubWorkflow....main()':
The application will start very quickly:
In a browser, navigate to http://localhost:8080/, and you will see the message "Hello, World!" as we programmed in our application:
Now let's launch the tests. Right-click `GithubWorkflowDemoApplicationTests` and choose "Run GithubWorkflowDemoApplicationTests:"
The tests are successful:
Great! You now have a simple application with a unit test. Don't forget to commit and push your new code to the repository.
# Creating a Unit Test Workflow in GitHub
We will start with GitHub out-of-the-box template workflow for unit tests. Go to the "Actions" tab:
...and then click on the "New workflow" button:
Search for "test":
The very first option is what we are looking for - we have a Maven project. Click "Configure":
GitHub will generate a sample workflow for you:
After you check it in, it will run it. However, unfortunately, the default workflow fails:
You will need to add to it to make it succeed.
# What's Wrong with the Out-of-the-Box Workflow?
Amazingly, the out-of-the-box workflow doesn't do any testing! I had to modify it as follows to make it run the tests:
I also added the surefire Maven plugin to `pom.xml`:
Now it actually runs the tests, however we still have errors.
# Dependency Graph Errors
The errors are security related, and are about the dependency graph:
GitHub template has these lines at the end, that are indicated as "optional", and they are giving errors:
To fix the dependency graph permissions, let's create a personal access token with all the needed permissions. First, go to your profile > Settings:
Then navigate to "Developer Settings" at the bottom:
Create a personal access token. Make sure you check all the needed permissions:
Copy your token:
Then navigate to your repository's Settings > Secrets and variables > Actions, and create a secret with the name GH_TOKEN and the value - the token that you just created:
Add your token to the workflow configuration:
Now the workflow succeeds!
# Testing the Workflow
Our workflow seems to be working well. Let's see what happens if our tests fail.
I made the test fail as follows:
Now when I launch them from the IDE, one of them fails:
After committing the changes, I found that the workflow also failed:
You can see the details, e.g., which tests failed and why, in the log:
I also see the failure in my email that is associated with my GitHub account:
Once I fixed the tests, the workflow was successful again:
# Conclusion
By following this guide, you have successfully set up a simple Java project with unit tests and configured GitHub Actions to automate the testing process. This ensures continuous integration and helps maintain code quality as your project evolves. | olsido |
|
1,913,423 | Understanding Specialty Lenders: A Comprehensive Guide | In today's dynamic financial landscape, businesses have a variety of funding options beyond... | 0 | 2024-07-06T05:42:57 | https://dev.to/digital_work_8666/understanding-specialty-lenders-a-comprehensive-guide-4jfb | webdev, webtesting, beginners, tutorial | In today's dynamic financial landscape, businesses have a variety of funding options beyond traditional banks. One such option is specialty lenders. These lenders offer unique advantages tailored to specific business needs, making them an essential component of the financial market.
What Are Specialty Lenders?
Specialty lenders are financial institutions that focus on providing loans and financial services to niche markets or sectors that traditional banks may overlook or consider too risky. These lenders often specialize in particular industries or types of financing, such as asset-based lending, equipment financing, or factoring.
Role in the Financial Market
Specialty lenders play a crucial role in the financial market by filling the gaps left by traditional banks. They offer customized financial solutions that address the unique needs of businesses, especially those that do not fit the conventional lending criteria of banks. Their expertise in specific industries allows them to better assess and manage the risks associated with lending to these sectors.
Key Differences Between Specialty Lenders and Traditional Banks
Flexibility in Lending
Specialty Lenders: Known for their flexibility, specialty lenders can tailor loan terms and structures to meet the specific needs of their clients. This includes customized repayment schedules and collateral requirements that align with the business's cash flow and operational cycles.
Traditional Banks: Banks generally have more rigid lending criteria and standardized loan products. They may not offer the same level of customization, which can be a disadvantage for businesses with unique financial needs.
Speed of Approval and Funding
Specialty Lenders: These lenders are typically more agile, offering quicker approval and funding processes. This is particularly beneficial for businesses needing immediate capital to seize opportunities or address urgent financial needs.
Traditional Banks: Banks often have longer approval processes due to their extensive underwriting procedures and regulatory requirements. This can delay the availability of funds.
Accessibility for Diverse Borrowers
Specialty Lenders: They are more willing to work with businesses that may not have a strong credit history or substantial collateral. Their focus on specific industries allows them to understand and mitigate risks better.
Traditional Banks: Banks usually prefer borrowers with strong credit profiles and significant assets to secure loans. This can exclude smaller businesses or those in high-risk industries from obtaining necessary financing.
Expertise and Industry Knowledge
Specialty Lenders: These lenders often possess deep industry knowledge and expertise, enabling them to offer more informed and strategic financial solutions. Their familiarity with industry-specific challenges allows them to provide valuable insights and support beyond just financing.
Traditional Banks: While banks have broad financial knowledge, they may lack the specialized understanding required to effectively support niche markets or industries.
Cost and Fees
Specialty Lenders: The cost of borrowing from specialty lenders can be higher than traditional banks due to the increased risk they take on. This includes higher interest rates and additional fees. However, the tailored financial solutions and flexible terms can justify the higher costs for many businesses.
Traditional Banks: Banks generally offer lower interest rates and fewer fees, but their stringent requirements and less flexible terms can make it difficult for some businesses to qualify.
Specialty lenders are vital to the financial ecosystem, offering tailored solutions and quick access to capital for businesses with unique needs. While they may come with higher costs, their flexibility, industry expertise, and accessibility make them an attractive option for many businesses. Understanding the key differences between specialty lenders and traditional banks can help businesses make informed decisions about their financing options, ensuring they choose the right lender to support their growth and financial stability. | digital_work_8666 |
1,913,422 | Who are Crypto Mining Influencers? | Influencers are experts in the crypto space, including thought leaders, celebrities and content... | 0 | 2024-07-06T05:42:14 | https://dev.to/lillywilson/who-are-crypto-mining-influencers-59nk | cryptocurrency, asic, bitcoin, cryptomining | Influencers are experts in the crypto space, including thought leaders, celebrities and content producers. They also have a strong following of followers who check in regularly to learn about new developments, trends, and opportunities. **[Crypto mining influencers ](https://asicmarketplace.com/blog/top-crypto-mining-influencers/)**are those who create and distribute content that influences the cryptocurrency investments of their followers. Influencers from social media platforms like Twitter, Instagram and TikTok are starting to change the way people interact and perceive digital currencies. They are not just talking heads, but powerful forces that promote investment and awareness. | lillywilson |
1,913,421 | Badges on github can anybody explain me about this? | A post by Aadarsh Kunwar | 0 | 2024-07-06T05:30:52 | https://dev.to/aadarshk7/badges-on-github-can-anybody-explain-me-about-this-53om | help | aadarshk7 |
|
1,913,420 | Learning | Started journey with learning python | 0 | 2024-07-06T05:28:35 | https://dev.to/saravana_prabhu_7e086df35/learning-4kpa | Started journey with learning
#python | saravana_prabhu_7e086df35 |
|
1,913,419 | The Evolution of Outdoor Functional Fabrics: From Performance to Sustainability | Outdoor functional fabrics evolved from performance to sustainability The article reads: "Proper... | 0 | 2024-07-06T05:28:31 | https://dev.to/francis_stonea_1cb94f585d/the-evolution-of-outdoor-functional-fabrics-from-performance-to-sustainability-2n16 | design | Outdoor functional fabrics evolved from performance to sustainability
The article reads: "Proper gear is paramount when people are going on outdoor pursuits. Triumphantly materialised by Joaquin Peacoat above, functional fabrics have always been available to the intrepid seeking performance upsides. That has changed with the new focus of these fabrics, from performance only to now also a major component in sustainability. In our next post, we will explore further benefits arising from sustainability and innovations featured aspects; security-focused implementations; versatile use-cases of LVTs on commercial grounds including residential interior ideas as well a final guiding factor about their quality with caring advantages.
Benefits of Sustainable Performance Fabrics
Cost-effective -The overall cost in the earthFriendly is not only low-budget but it also offers an environment sustainability trait one of their most desirable thing when picking out everyday peformance waterproof breathable fabrics. They are engineered to be made and used with reduced waste, less pollution all while never creating any other negative impact on our environment. Sustainable fabrics are also frequently made from organic or recycled materials, thus lowering the need for new resources. Extended durability means they can be used longer before needing to be replaced, which is another plus.
Future Tech: Smart, Functional Fabrics That are Ready for the Masses |||||| The Innovation On Sustainable Facilities
Futurisitic designs are continuous emerging in the sustainable functional segment as it answers to our desire for an environmental friendly and long lasting apparel. One of the most recent breakthrough made was an inventor that produced fabrics from recycled plastic water bottles. Apart from adding environmental benefits, these stuffs comes with long term durability and wear and tear resistivity. The new generation of customizable displays goes even further, integrating plant-based materials (bamboo or corn fibers), advanced recyclable properties and water management systems to reduce the carbon footprint while providing a biodegradable option to those businesses deeply concerned with ecological effects.
Safety in Functional Fabrics
While safety is one of the utmost considerations among different outdoor enthusiasts, this sustainable functional fabric leverages high standards for top-notch protection and friendliness towards nature. In particular, whereas conventional fabrics typically use synthetic dyes and chemicals to treat their textiles (that can be bad for the environment), sustainable breathable waterproof fabrics often specify natural treatment. These all-natural remedies also have antimicrobial properties which helps in preventing the growth of harmful bacteria and fungi on the more info: visithere.
Sustainable functional fabrics
They are also used to design fabrics that can be utilised for numerous outdoor activities including hiking, camping and climbing. These materials are commonly water repellent or with waterproof coverings, making them perfect for moist scenarios. Furthermore, it is important that they stay lightweight and breathable to keep adventurers comfortable during physical activity.
Sustainable Functional Fabrics Quality
Quality standards of sustainable functional fabrics are often equivalent to or exceed those applicable for traditional quality (08). These fabrics are generally regarded as being of higher quality and more durable than other options on the market because they consist of important, solid materials. They are designed and built specifically to take a beating, so they can be ideal for outdoorsmen who need gear that is purpose-built for rocky trails mountains or weather inclement forests.
Utilization of Environmentally Friendly Fabrics
In addition to this nature-proof material, sustainable functional fabrics are also suitable for applications beyond outdoor gear and the fitness industry - including fashion. Designers are now more and more aspiring for sustainable equivalents to the traditional materials. In addition, home textiles including bedding & curtains and the automobile interior and some industrial products followed those steps.
Sustainable Functional Fabric Application
Its exactly like producing traditional fabrics in that sense, but with sustainable functional fabrics. They can be laundered as easily like any other fabric and care instructions would differ among the waterproof material fabric material type or treatment applied. This means that the care guidelines stipulated by their supplier must be adhered to in order to sustain the functional fabrics as long-lasting.
So, it can be finished as sustainable performance outdoor wear to take the outdoors and do more with less. Their green characteristics, long lifespan, safety standard styles and multipurpose use due to their design variant makes them an ideal option for consumers looking for quality sustainable materials. We eagerly look forward to more future exciting advancements in sustainable functional fabrics. | francis_stonea_1cb94f585d |
1,913,418 | Public speaker | A post by Sekar Jeyalakshmi | 0 | 2024-07-06T05:28:14 | https://dev.to/sekar_jeyalakshmi_975be83/public-speaker-b96 | webdev, beginners, javascript, tutorial | sekar_jeyalakshmi_975be83 |
|
1,913,417 | Discover the Ultimate Salon Experience at HQ Smart Salon in Mumbai | Nestled in the heart of Mumbai, HQ Smart Salon stands as a beacon of luxury and expertise in the... | 0 | 2024-07-06T05:25:06 | https://dev.to/abitamim_patel_7a906eb289/discover-the-ultimate-salon-experience-at-hq-smart-salon-in-mumbai-4907 | saloninmumbai, bestsaloninmumbai | Nestled in the heart of Mumbai, **[HQ Smart Salon](https://trakky.in/Mumbai/Boriwali%20West/salons/HQ%C2%B2%20-smart-salon-borivali-west)** stands as a beacon of luxury and expertise in the bustling cityscape. Whether you're a local or a visitor seeking a pampering session, HQ Smart Salon promises an unparalleled experience that blends top-notch service with a welcoming ambiance.
Luxurious Atmosphere and Expertise
Step into **[HQ Smart Salon](https://trakky.in/Mumbai/Boriwali%20West/salons/HQ%C2%B2%20-smart-salon-borivali-west)**, and you're greeted by a sophisticated ambiance that instantly relaxes and rejuvenates. The salon's commitment to luxury is evident in every detail, from plush seating areas to state-of-the-art grooming stations.
Expert Stylists and Personalized Service
At HQ Smart Salon, grooming is an art mastered by seasoned professionals. Each stylist brings a wealth of experience and a passion for their craft, ensuring that every haircut, color, or treatment exceeds expectations. Whether you're looking for a classic haircut or a bold new look, HQ Smart Salon's stylists are dedicated to bringing your vision to life.
Comprehensive Services for Every Need
From haircuts and styling to rejuvenating facials and relaxing massages, HQ Smart Salon offers a comprehensive range of services tailored to meet every grooming need. Each service is curated to enhance your natural beauty and leave you feeling refreshed and confident.
Booking Made Easy with Trakky
Booking your appointment at HQ Smart Salon is seamless with Trakky. Our platform allows you to browse services, check availability, and book your preferred time slot effortlessly. Whether you're planning ahead or need a last-minute appointment, Trakky ensures convenience at your fingertips.
Visit HQ Smart Salon Today!
Experience the epitome of luxury grooming at **[HQ Smart Salon in Mumbai](https://trakky.in/Mumbai/Boriwali%20West/salons/HQ%C2%B2%20-smart-salon-borivali-west)**. Discover why discerning individuals choose HQ Smart Salon for their beauty needs. Book your appointment through Trakky and indulge in a personalized grooming experience like no other. | abitamim_patel_7a906eb289 |
1,913,415 | Unleash the Power of Dropdown Menu | A useful and space-saving way for visitors to access a variety of options, dropdown menus are an... | 0 | 2024-07-06T05:17:46 | https://dev.to/code_passion/unleash-the-power-of-dropdown-menu-26eo | css, webdev, html, tutorial | A useful and space-saving way for visitors to access a variety of options, dropdown menus are an essential component of web design. This thorough tutorial will cover the principles of dropdown menus, their significance in web design, and how to improve their usability and appearance using CSS pseudo-elements::before and ::after.
**Understanding Dropdown Menus**
[Dropdown menus](https://skillivo.in/power-of-dropdown-menus/), sometimes referred to as drop-down menus, are interactive components that are frequently seen in user interfaces. Usually, they are made up of a parent element, such a button or link, that, when clicked, exposes a concealed list of options. These choices may consist of form choices, navigational links, or other interactive components.
**Enhancing Dropdowns with CSS Pseudo-elements**
output:
While dropdown menus are a common feature in web design, their appearance and behaviour can be improved with CSS pseudo-elements::after and::before. These sophisticated tools enable designers to alter dropdown menus without cluttering the HTML syntax, allowing for a variety of creative possibilities.([Read more](https://skillivo.in/power-of-dropdown-menus/))
Let’s examine an example 1 : to see how CSS pseudo-elements can be used to create a Basic-level dropdown menu:
```
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,100..900;1,100..900&display=swap"
rel="stylesheet">
<style>
body {
font-family: "Montserrat", sans-serif;
font-optical-sizing: auto;
font-style: normal;
}
.dropdown {
position: relative;
/* Make the dropdown container the reference point */
width: 200px;
display: inline-block;
}
.dropdown-toggle {
padding: 20px 15px;
border: none;
background-color: #008CBA;
cursor: pointer;
width: 100%;
color: white;
font-size: 16px;
font-weight: 400;
}
.dropdown-menu {
display: none;
/* Hide the menu initially */
position: absolute;
left: 0;
background-color: #ffffff;
list-style: none;
padding: 0;
width: 100%;
margin: 0;
padding: 0;
box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
z-index: 1;
}
.dropdown-menu li {
display: block;
}
.dropdown-menu li a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
font-size: 14px;
}
/* Change color of dropdown links on hover */
.dropdown-menu li a:hover {
background-color: #f1f1f1
}
.dropdown:hover .dropdown-menu {
/* Show the menu on hover */
display: block;
}
/* Dropdown arrow using ::after */
.dropdown-toggle:after {
content: "";
position: absolute;
top: 50%;
right: 10px;
transform: translateY(-50%);
/* Center the arrow vertically */
border-style: solid;
border-color: #ffffff transparent transparent transparent;
}
</style>
</head>
<body>
<div class="dropdown">
<button class="dropdown-toggle">Select an Option</button>
<ul class="dropdown-menu">
<li><a href="#">Option 1</a></li>
<li><a href="#">Option 2</a></li>
<li><a href="#">Option 3</a></li>
</ul>
</div>
</body>
</html>
```
In this example, we have a Basic-level dropdown menu .
Read - [multi-level dropdown menu](https://skillivo.in/power-of-dropdown-menus/)
**Why Use Dropdown Menus?**
Dropdown menus offer several advantages that make them a popular choice in web design:
**Space Efficiency**
Dropdown menus save screen space by hiding items until they are required, making them perfect for websites with limited space or complex navigation structures.
**Organizational Hierarchy**
Designers can use dropdown menus to organize material hierarchically, allowing visitors to dig down into certain categories or sections without overwhelming them with too much information at once.
**User Control**
Users can customize their browsing experience with dropdown menus, which save up interface space while giving them access to more options and information when needed.
**Consistency**
Dropdown menus provide a consistent interface pattern that consumers are accustomed with, resulting in a more intuitive and predictable user experience across multiple websites and applications. | code_passion |
1,913,414 | ExpressoTS - DB in Memory | Explore our In-Memory DB in action! 🐎 This straightforward class enables developers to prototype... | 0 | 2024-07-06T05:16:36 | https://dev.to/expressots/expressots-db-in-memory-259n | typescript, node, api, learning | Explore our In-Memory DB in action! 🐎
This straightforward class enables developers to prototype APIs effortlessly, eliminating the need to connect to or set up database. Perfect for rapid development and testing!
{% youtube gT4-QZCh1eU %} | rsaz |
1,913,413 | Tribute page | Bootstrap is a CSS framework. Its responsive layout and pre-styled components make it my choice for... | 0 | 2024-07-06T05:16:30 | https://dev.to/mutalibb/tribute-page-6ei |
Bootstrap is a CSS framework. Its responsive layout and pre-styled components make it my choice for this project. The intentionally large images draw attention, as they depict the subject of the page. I used the carousel component to create a scrollable image display.
Additionally, I included Scroll spy, Collapse, and Card components to enhance the page’s appearance and provide a better user experience. The logo is styled using CSS box shadow and animation. | mutalibb |
|
1,896,485 | Stop Using OBS: Why Vidova.ai is the Screen Recorder You Didn’t Know You Needed | OBS Studio has long been a staple for streamers and content creators, but for developers and... | 0 | 2024-07-06T05:04:11 | https://dev.to/vidova/stop-using-obs-why-vidovaai-is-the-screen-recorder-you-didnt-know-you-needed-43pg | productivity, news, microsoft, tutorial | OBS Studio has long been a staple for streamers and content creators, but for developers and technical professionals seeking streamlined functionality and ease of use, OBS often falls short. This is particularly true when trying to integrate features like AI-generated captions or displaying keyboard actions—tasks that can become tangled in a web of plugins and configurations. Here’s why [Vidova.ai](https://vidova.ai) offers a superior alternative.
## 🛑 The Limitations of OBS for Simple Enhancements
{% vimeo https://vimeo.com/978769108 %}
OBS, while powerful, complicates what should be straightforward. Adding basic functionalities such as AI captions or displaying keyboard actions usually involves navigating through multiple plugins, some of which are not free. This can quickly become a frustrating and costly endeavor.
## ✨ Enter Vidova.ai: A Tailored Solution
{% vimeo https://vimeo.com/978769125 %}
[Vidova.ai](https://vidova.ai) is designed to cut through the complexity, offering a seamless and intuitive screen recording experience tailored for tech professionals. It simplifies every aspect of screen recording and editing, ensuring that you can focus more on creating and less on configuring.
- **👌 User-Friendly Interface:** Quickly start recording with an intuitive setup that bypasses the steep learning curve associated with OBS.
- **🔧 Integrated Developer Features:** Enjoy built-in support for AI captions and displaying keyboard shortcuts during recordings—no plugins or additional purchases necessary.
- **🎥 Efficient Editing and Recording:** Capture and edit high-quality videos up to 4K at 60 FPS with integrated tools designed for productivity.
## 🖱️ Advanced Cursor Enhancement
{% vimeo https://vimeo.com/978769090 %}
A standout feature of [Vidova.ai](https://vidova.ai) is its ability to replace your system cursor with a high-quality SVG cursor during recordings. This not only enhances the visual appeal of your videos but also offers optional smoothing of cursor motion, creating a sleek, glide-like movement that can make tutorials and demonstrations significantly more engaging and easier to follow.
*🌟 Benefits of Vidova's SVG Cursor Enhancements:*
- **🔍 Enhanced Clarity:** The high-resolution SVG cursor remains crisp and clear at all zoom levels, making it ideal for high-definition recordings.
- **🌊 Smooth Motion:** The optional smooth glide feature makes cursor movements fluid and easy to track, reducing visual clutter and enhancing viewer comprehension.
- **💼 Professional Aesthetics:** The sleek cursor design contributes to a more polished and professional-looking video, setting your content apart from others.
## 🔁 Why Make the Switch to Vidova.ai
{% vimeo https://vimeo.com/978771055 %}
If you’re still using OBS out of habit, consider these compelling reasons to switch to [Vidova.ai](https://vidova.ai):
- **🚫 No More Plugin Hassles:** Say goodbye to the complexity of plugins for basic features. Vidova.ai offers these functionalities out of the box.
- **🎯 Tailored for Creators:** Unlike OBS, which is designed for a broad audience, Vidova.ai is specifically crafted to support the workflows of developers and tech educators.
- **⚙️ Streamlined Design:** Focus on creating content with a tool that is both powerful and easy to use, designed to enhance your productivity.
## 🤝 Join the Vidova.ai Community
Choosing [Vidova.ai](https://vidova.ai) means joining a community of like-minded tech professionals who value efficiency and quality. Your feedback and experiences help shape the software, ensuring that it continuously evolves to meet the specific needs of its users. Vidova.ai isn't just about providing a tool; it's about fostering a collaborative community that enhances everyone's screen recording experience.
[](https://discord.gg/55wgwerYvy)
## 🎬 Final Words
It's time to move away from the cumbersome OBS and embrace a tool that truly aligns with your needs as a developer or tech educator. Vidova.ai combines ease of use with powerful features, making it the ideal choice for those who want to produce high-quality, professional-looking videos without the hassle of complex setups and plugins.
Say goodbye to the generic approach of OBS and welcome the tailored efficiency of [Vidova.ai](https://vidova.ai). Enhance your productivity and elevate your content with a tool designed specifically for tech professionals.
**🚀 For Teams:** Vidova.ai is also perfect for teams looking to enhance their collaborative projects and streamline their screen recording processes. For team inquiries or to discuss how Vidova.ai can benefit your organization, please reach out directly to me at [email protected]. Let’s optimize your team's creative potential with Vidova.ai.
**👉 Don’t wait!** Join us at Vidova.ai and become part of a movement that’s redefining what screen recording software can do. Sign up today and start transforming the way you create and share your projects.
| vidova |
1,913,411 | Building a Sustainable Future: The Importance of Solar Systems | Are you interested in learning how solar systems will allow you to build a future that is... | 0 | 2024-07-06T05:03:41 | https://dev.to/julie_andersonv_6d4551eeb/building-a-sustainable-future-the-importance-of-solar-systems-g0f | design |
Are you interested in learning how solar systems will allow you to build a future that is sustainable? Let us explore all of the advantages, innovation, security, usage, and quality of solar systems, along with their applications
Benefits of Solar Systems
Solar systems utilize renewable energy, which means they do not contribute to climate pollution or change. Also, they are economical for the long-lasting you save very well energy bills as they assist. Solar panels need minimal maintenance and last for at minimum 25 years, ensuring that you have actually long-term benefits. In addition, solar energy is abundantly available and can be harnessed all over the world
Innovation in Solar Technologies
Innovative technologies that are solar made solar systems more efficient and effective. Solar panels are now smarter and can self-adjust to optimize energy production and storage. Upgradable modules that are magnetic the performance and reliability of solar panels. Advanced hybrid inverter off grid design and engineering have significantly paid down the expense of manufacturing and installing of solar power panels
Safety of Solar Systems
Solar systems are safe and pose no hazard or risk to individuals or the environment. They emit zero toxins or carbon dioxide into the fresh air, making them the safest and type that is cleanest of production available
Making Use Of Solar Systems
Solar systems help provide energy to power homes, smartphones, computers, and cars, among other things. The systems have become more than just jobs to improve conditions which are environmental but have actually now transitioned to a form of suffered power supply for everyday need
How to Use Solar Systems
The installation of solar systems requires a specialist that is professional also it is vital to determine the placement that is right of panels to optimize power hybrid inverter on off grid production. You can power most gadgets being electrical as radios, laptops, or water pumps. Solar systems come in various sizes, which can fit any space or need
Solar System Services
Solar system services include installation, maintenance, and repair. It is vital to select a company that is reputable offers warranties and customer support to ensure that your system works seamlessly and efficiently
Quality of Solar Techniques
The first thing to consider is its quality in selecting a system that is solar. We might recommend taking care of solar systems with high energy output and efficiency that is module. It is also smart to consider the durability of the panels which can be solar that may ensure that you get long-lasting advantages of your investment
Applications of Solar Systems
Solar systems are very versatile and is placed on residential, commercial, or structures that are industrial. They can power farms which are solar street lights, and water pumps, among other hybrid on off grid inverter devices, and can significantly reduce energy bills
In conclusion, solar systems are a definite investment that is great they offer a sustainable and environmentally friendly supply of power. They pose no danger to people or the environment and generally are simple to use and maintain. They are flexible in application, and their quality and innovation have notably improved their performance. Begin the journey to a far more future that is sustainable embracing solar systems today
| julie_andersonv_6d4551eeb |
1,896,786 | I AM A REACT DEV. | A post by Burhaan Hassan | 0 | 2024-06-22T07:38:38 | https://dev.to/burhaan_hassan/i-am-a-react-dev-3b82 | burhaan_hassan |
||
1,913,410 | 🔥 What is TypeScript and Why Should You Use It? | In the ever-evolving landscape of web development, TypeScript has emerged as a powerful tool that... | 0 | 2024-07-06T05:02:43 | https://dev.to/sovannaro/what-is-typescript-and-why-should-you-use-it-1558 | webdev, javascript, beginners, programming | In the ever-evolving landscape of web development, TypeScript has emerged as a powerful tool that enhances the capabilities of JavaScript. This article will delve into what TypeScript is, its key features, and the reasons why you should consider using it in your projects.
## [What is TypeScript?](https://sovannaro.dev/what-is-typescript/)
TypeScript is an open-source programming language developed and maintained by Microsoft. It is a statically typed superset of JavaScript, which means it builds on JavaScript by adding static types. TypeScript code is transpiled into plain JavaScript, making it compatible with any environment that runs JavaScript, including browsers, Node.js, and more.
### Key Features of TypeScript
1. **Static Typing**: TypeScript introduces static types to JavaScript, allowing developers to define the types of variables, function parameters, and return values. This helps catch type-related errors at compile time rather than runtime.
2. [**Type Inference**](https://sovannaro.dev/what-is-interference-in-typescript/): TypeScript can automatically infer the types of variables and expressions based on their values and usage, reducing the need for explicit type annotations.
3. [**Interfaces and Type Aliases**](https://sovannaro.dev/what-is-interference-in-typescript/): TypeScript provides interfaces and type aliases to define the shape of objects and complex types, making the code more readable and maintainable.
4. [**Classes and Inheritance**](https://sovannaro.dev/what-are-classes-in-typescript/): TypeScript supports object-oriented programming with classes, inheritance, and access modifiers, enabling developers to write more structured and reusable code.
5. **[Modules](https://sovannaro.dev/what-are-typescript-modules/)**: TypeScript supports ES6 module syntax, allowing developers to organize their code into reusable modules.
6. [**Decorators**](https://sovannaro.dev/parameter-decorators-in-typescript/): TypeScript introduces decorators, a special kind of declaration that can be attached to classes, methods, accessors, properties, or parameters to modify their behavior.
7. **Tooling and IDE Support**: TypeScript offers excellent tooling and IDE support, including autocompletion, type checking, and refactoring, which significantly improves the developer experience.
## Why Should You Use TypeScript?
### 1. Improved Code Quality and Maintainability
TypeScript's static typing helps catch errors early in the development process, reducing the likelihood of runtime errors. This leads to more robust and reliable code. Additionally, the explicit types make the code more readable and easier to understand, which is particularly beneficial in large codebases and team environments.
### 2. Enhanced Developer Productivity
TypeScript's powerful type system and advanced tooling support enhance developer productivity. Features like autocompletion, intelligent code navigation, and refactoring tools enable developers to write code faster and with fewer errors. The improved developer experience leads to shorter development cycles and faster time-to-market.
### 3. Seamless Integration with JavaScript
TypeScript is designed to be a superset of JavaScript, meaning any valid JavaScript code is also valid TypeScript code. This allows developers to gradually adopt TypeScript in existing JavaScript projects without having to rewrite the entire codebase. TypeScript can be incrementally introduced, making the transition smooth and manageable.
### 4. Better Collaboration and Onboarding
TypeScript's explicit types and [interfaces](https://sovannaro.dev/what-are-interfaces-in-typescript/) serve as a form of documentation, making it easier for new team members to understand the codebase. This improves collaboration and reduces the time required for onboarding new developers. The clear type definitions also facilitate better communication within the team.
### 5. Future-Proofing Your Code
TypeScript keeps pace with the latest ECMAScript standards, ensuring that your code is future-proof. By using TypeScript, you can take advantage of modern JavaScript features and syntax while maintaining compatibility with older environments. This helps ensure that your code remains relevant and maintainable in the long term.
### 6. Strong Community and Ecosystem
TypeScript has a vibrant and growing community, with extensive resources, libraries, and frameworks available. Popular frameworks like Angular and tools like Visual Studio Code have embraced TypeScript, further solidifying its position in the web development ecosystem. The strong community support ensures that you have access to a wealth of knowledge and best practices.
## Conclusion
TypeScript is a powerful and versatile language that brings the benefits of static typing to JavaScript. By improving code quality, enhancing developer productivity, and providing seamless integration with existing JavaScript code, TypeScript has become a valuable tool for modern web development. Whether you are working on a small project or a large-scale application, TypeScript can help you write more reliable, maintainable, and future-proof code. Consider adopting TypeScript in your next project and experience the advantages it offers.
- [TypeScript Tutorial](https://sovannaro.dev/category/typescript/)
- [Example Source Code TypeScript](https://github.com/SOVANNARO/typescript-tutorial) | sovannaro |
1,913,409 | FX/OTC Volumes and Settlement Components | Every three years, the Swiss National Bank conducts a survey on the turnover1 in the foreign exchange... | 0 | 2024-07-06T05:02:17 | https://dev.to/paihari/fxotc-volumes-and-settlement-components-1k5n | Every three years, the Swiss National Bank conducts a survey on the turnover1 in the foreign exchange and over-the-counter derivatives markets in Switzerland. This survey is coordinated worldwide by the Bank for International Settlements (BIS).
In April 2022, the 30 reporting banks recorded turnover in foreign exchange and derivatives transactions of **USD 367 billion per trading day.** Foreign exchange transactions accounted for USD 350 billion (95%) of this total, and interest rate derivatives transactions for USD 18 billion (5%).
[Swiss National Bank Report](https://data.snb.ch/en/topics/ziredev/doc/ddum_2022)
FX/OTC is huge value, but very low margin business, which is core for the functioning of the Banks, Markets and Country in General
Below are the 10 steps involved in FX/OTC settlement business
**1. Trade Capture**
Trade Execution: The initiation of a trade in the FX or OTC derivatives market, where two parties agree on the terms of the transaction.
Trade Recording: The details of the executed trade are captured in the trading system. This includes information such as the type of instrument, trade date, value date, counterparties, notional amount, and agreed price.
**2. Trade Validation**
Confirmation Matching: Both parties to the trade send confirmations of the trade details to each other. These confirmations are matched to ensure both parties agree on the trade details.
Trade Validation: Internal validation processes ensure that the trade details are correct and conform to the organization's policies and regulatory requirements.
**3. Settlement Instructions**
Instruction Generation: Based on the trade details, settlement instructions are generated. These instructions detail the accounts and the amounts to be settled.
Instruction Transmission: Settlement instructions are sent to the appropriate clearing or settlement systems. In FX markets, this might involve sending instructions to an FX settlement system like CLS (Continuous Linked Settlement).
**4. Reconciliation**
Internal Reconciliation: Comparing internal records of trades and settlements to ensure consistency.
External Reconciliation: Comparing internal records with external records from counterparties, custodians, or settlement systems to identify and resolve discrepancies.
**5. Settlement**
Payment Processing: The actual transfer of funds or assets between parties. In FX settlements, this often involves the simultaneous exchange of different currencies.
Delivery vs. Payment (DVP): In the case of securities, ensuring that the delivery of the security and the payment occur simultaneously to mitigate settlement risk.
**6. Risk Management**
Exposure Management: Monitoring and managing the financial exposure resulting from open FX and derivatives positions.
Collateral Management: Managing the collateral posted against derivatives positions to mitigate counterparty risk.
**7. Reporting**
Regulatory Reporting: Providing required reports to regulatory bodies, which may include transaction details, valuations, and risk metrics.
Internal Reporting: Generating reports for internal stakeholders, including risk management, finance, and compliance teams.
**8. Post-Settlement Processing**
Accounting: Recording the settled trades in the accounting systems.
Dispute Resolution: Handling and resolving any disputes or discrepancies that arise from the settlement process.
**9. Technology and Infrastructure**
System Integration: Ensuring that trading, risk management, and settlement systems are properly integrated to facilitate smooth processing.
Data Management: Managing the data required for the entire settlement process, ensuring accuracy and integrity.
**10. Continuous Improvement**
Process Review: Regularly reviewing and improving settlement processes to enhance efficiency, reduce risk, and comply with evolving regulatory requirements.
Automation: Implementing automated solutions to reduce manual intervention and errors in the settlement process.
| paihari |
|
1,897,398 | Intelligent Engineering with AI | Unlock the potential of AI in your software development workflow with LeanDog's "Intelligent Engineering with AI" course. Master integrating AI tools like GitHub Copilot and ChatGPT to enhance productivity and code quality. Dive into Test-Driven Development (TDD), applying AI to write reliable, maintainable code. Embrace Software Craftsmanship by learning fundamental design principles, addressing code smells, and employing practical refactoring techniques. Experience real-world applications through hands-on exercises, including advanced prompt engineering and a task management API project. Gain practical insights and build confidence in using AI to streamline your development processes, ensuring your skills are future-ready and your code is top-notch. Join us and transform your approach to coding with the power of intelligent engineering. | 0 | 2024-07-06T05:02:13 | https://dev.to/dev3l/intelligent-engineering-with-ai-1npf | ai, softwarecraftsmanship, testdrivendevelopment, extremeprogramming | ---
title: Intelligent Engineering with AI
published: true
description: Unlock the potential of AI in your software development workflow with LeanDog's "Intelligent Engineering with AI" course. Master integrating AI tools like GitHub Copilot and ChatGPT to enhance productivity and code quality. Dive into Test-Driven Development (TDD), applying AI to write reliable, maintainable code. Embrace Software Craftsmanship by learning fundamental design principles, addressing code smells, and employing practical refactoring techniques. Experience real-world applications through hands-on exercises, including advanced prompt engineering and a task management API project. Gain practical insights and build confidence in using AI to streamline your development processes, ensuring your skills are future-ready and your code is top-notch. Join us and transform your approach to coding with the power of intelligent engineering.
tags: #AI #SoftwareCraftsmanship #TestDrivenDevelopment #ExtremeProgramming
cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/fr4142izh2utgorx7csi.png
---
[Originally posted on Dev3loper.ai](https://www.dev3loper.ai/insights/intelligent-engineering-with-ai)
Imagine supercharging your software development workflow with the power of artificial intelligence. As the founder of Dev3l Solutions and a Staff Engineer at [Artium](https://artium.ai/), I've spent years integrating AI into production systems—creating innovative solutions such as RAG systems for clients and enhancing personal projects. These experiences have demonstrated the transformative potential of AI in real-world applications.
On the other hand, tools like GitHub Copilot and ChatGPT have become indispensable for daily software development tasks. These AI tools streamline coding, provide intelligent suggestions, and assist with debugging, greatly enhancing efficiency and code quality. Recently, I partnered with [LeanDog](https://www.leandog.com/) to create and instruct the "[Intelligent Engineering with AI](https://www.leandog.com/intelligent-engineering-with-ai)" course, aimed at sharing these groundbreaking techniques with fellow developers.
Integrating AI with traditional software development practices is not just a trend but a crucial evolution. AI tools can automate repetitive tasks, provide intelligent code suggestions, and assist in debugging, significantly reducing development time and improving code quality. Fusing AI and traditional methodologies fosters innovation, enhances productivity, and ensures developers can focus on more complex problem-solving aspects. This course encapsulates the essence of blending AI with tried-and-true development techniques, showcasing its potential to elevate coding standards and efficiency.
The practice problems and course materials can be found [here](https://github.com/leandog/intelligent-engineering-with-ai).
## AI Tools Integration
We started the course by exploring integrating AI tools into our workflow, emphasizing how indispensable they can become. **GitHub Copilot** and **GitHub Copilot Chat** were stars of the show, uncovering how they transcend beyond simple code generation. We delved into their advanced features, like real-time autocompletion and debugging assistance, which make coding faster and more intuitive.
Participants were particularly impressed with how GitHub Copilot could swiftly generate code snippets, eliminating the monotony of writing boilerplate code. This has saved considerable time in my projects, allowing me to focus on complex problem-solving rather than repetitive tasks. The tool's intelligent autocompletion capabilities were another game-changer, offering suggestions that save time and minimize potential errors in the early stages of development. Those unfamiliar with the C# programming language could quickly write functional code. Participants had no problem completing the exercises, thanks to AI assistance. Regarding debugging, GitHub Copilot provides invaluable assistance by identifying issues, suggesting fixes, and streamlining the coding process.
We didn't stop there. **ChatGPT** demonstrated its prowess in significantly enhancing productivity. It can generate detailed code documentation and provide real-time coding advice, and it also excels in creating diagrams with **Mermaid** or **Graphviz**. These visual aids are crucial for understanding and communicating complex system designs. Imagine having an AI partner that can produce clear, concise diagrams right when you need them!
Moreover, we explored how both GitHub Copilot and ChatGPT serve as virtual pair programming partners. They prove invaluable for suggested refactorings, providing insights into making the code cleaner and more efficient. They also assist in code reviews, ensuring the code adheres to best practices and maintaining high quality.
A unique aspect of our course was the introduction of a custom GPT I developed, named **[Tyler Morgan](https://chatgpt.com/g/g-m8zONvdCL-leandog-intelligent-engineering-with-ai)**, who acted as a virtual course assistant. Tyler Morgan offered insights and strategies for integrating AI tools in software engineering, including coding practices, agile methodologies, and team collaboration. Students and anyone interested can access Tyler anytime!
Throughout the course, participants were encouraged to get hands-on and leverage these AI tools while working on all the practice problems. This practical approach ensured that everyone could experience firsthand how these tools boost productivity and enhance the overall quality of their code. By using these tools as intelligent collaborators, developers can focus more on creative and complex aspects of software development.
## Test-Driven Development (TDD)
In the course, we devoted much time to mastering Test-Driven Development (TDD), a cornerstone of reliable software engineering. Understanding the core principles of TDD was paramount, beginning with the foundational **Red, Green, Refactor cycle**. In this approach:
- **Red**: You start by writing a test that fails because the desired feature isn't implemented yet.
- **Green**: Next, you write the minimal amount of code needed to pass the test.
- **Refactor**: Finally, you clean up the code, optimizing it without altering its behavior.
This cycle encourages simplicity and regular refinement, which is essential for maintaining clean and efficient code.
We emphasized the importance of TDD in ensuring code reliability and maintainability. The tests act as a safety net, catching bugs early and giving developers the confidence to make changes without fear of breaking existing functionality. This continuous testing approach reduces the likelihood of defects and makes the codebase easier to understand and modify. With the assistance of AI tools, TDD becomes even more powerful, as they can provide intelligent code suggestions while ensuring that these suggestions do not cause any regressions. This synergy between TDD and AI ensures a robust, high-quality codebase.
To make these concepts tangible, we dove into several practical katas:
- **Fizz Buzz**: This classic exercise introduced participants to TDD basics, establishing a solid foundation.
- **Duration Converter**: We practiced converting between different time units, reinforcing how TDD can handle various transformations and validations.
- **Bowling Kata**: This problem required managing a complex scoring system with numerous edge cases, demonstrating TDD's power in handling intricate logic.
- **Roman Numeral Calculator**: Participants converted numbers into Roman numerals, sharpening their algorithmic thinking and ensuring correctness through tests.
- **Gilded Rose Kata**: Perhaps the most intricate kata, this exercise involved maintaining and refactoring a legacy codebase. It highlighted how TDD can help add new features and improve existing systems for better design and performance.
Participants were encouraged to collaborate and pair up to solve these katas, fostering a shared learning experience. Leveraging AI tools like GitHub Copilot and ChatGPT, they wrote tests, refactored code, and saw the immediate benefits of having a robust testing strategy. This hands-on approach allowed everyone to experience the efficiency and quality improvements TDD brings.
The practical insights shared during these exercises were directly applicable to real-life projects. We discussed common challenges, such as integrating TDD into existing workflows and dealing with initially slow development due to writing tests upfront. However, the long-term benefits, such as continuous validation of code functionality and early detection of issues, far outweigh the initial overhead.
By the end of this section, participants recognized that TDD is not just a testing technique but a development methodology that enhances code quality and developer confidence. It provides a safe environment to refactor code, ensuring functionality remains intact and paving the way for more innovative and bold coding endeavors.
## Software Craftsmanship
We have dedicated a substantial segment to software craftsmanship. This philosophy goes beyond just writing functional code; it emphasizes writing clean, maintainable, and efficient code that can withstand the test of time. It's about professional pride, continuous learning, and striving for excellence in every line of code we write.
We began by introducing the concept of Software Craftsmanship. The idea is to go beyond mere functionality and focus on building high-quality software. Taking pride in our work and continually honing our skills are essential tenets. This approach not only elevates the quality of the code but also increases overall developer satisfaction and team productivity.
Alongside design patterns, we delved into software design principles:
- **SOLID Principles** offered a robust framework:
- **Single Responsibility Principle (SRP)** encourages designing classes with only one reason to change, which enhances modularity and readability.
- **Open/Closed Principle (OCP)** promotes the idea that software entities should be open for extension but closed for modification, fostering a more adaptable codebase.
- **Liskov Substitution Principle (LSP)** asserts that objects of a superclass should be replaceable with objects of a subclass without affecting functionality, ensuring reliable and stable code.
- **Interface Segregation Principle (ISP)** advocates for creating specific interfaces rather than a general-purpose one, which helps reduce unnecessary dependencies.
- **Dependency Inversion Principle (DIP)** highlights that high-level modules should not depend on low-level modules. Both should depend on abstractions, lending to a more flexible and decoupled design.
- **DRY (Don't Repeat Yourself)** encourages abstracting out commonalities to reduce repetition, making the code more maintainable and more accessible to update.
- **YAGNI (You Ain't Gonna Need It)** emphasizes implementing features only when necessary, preventing overengineering and unnecessary complexity.
- **Boy Scout Rule**: This principle suggests that developers should always leave the codebase cleaner than they found. Just like Boy Scouts are taught to leave the campground cleaner, programmers should make minor improvements to the code whenever they touch it, ensuring continuous enhancements.
- **ZOMBIES** was particularly useful for problem-solving and Test-Driven Development (TDD). It's an acronym that stands for:
- **Zero**: Start with the simplest thing that can work, focusing on base case scenarios.
- **One**: Get one scenario to work, confirming the functionality for a single instance.
- **Many**: Generalize to handle multiple cases, ensuring the solution works across variations.
- **Boundaries**: Identify and define the system's boundaries.
- **Interfaces**: Ensure clear and well-defined interfaces.
- **Errors**: Proper handling of errors and edge cases.
- **Simple**: Keep the approach simple, avoiding unnecessary complexity.
Identifying and addressing **code smells** was another critical aspect of our course. We pinpointed common issues such as:
- **Long Methods**: Methods that have grown too large and complicated.
- **Large Classes**: Classes taking on too many responsibilities.
- **Duplicated Code**: Identical code blocks appearing in multiple places.
- **Feature Envy**: Methods that overly rely on the details of another class.
To combat these, we introduced practical **refactoring techniques**:
- **Extract Method**: Breaking down extensive methods into smaller, more manageable pieces.
- **Rename Variable**: Using meaningful variable names to improve readability.
- **Introduce Parameter Object**: Grouping parameters into an object to streamline method signatures.
- **Remove Dead Code**: Cleaning out code no longer used to keep the codebase lean and efficient.
Finally, we discussed **design patterns**, which are proven solutions to common problems in software design. We explored critical patterns like:
- **Singleton**: Ensure a class has only one instance and provides a global access point. It is beneficial in scenarios requiring a single control point, like logging or configuration settings.
- **Factory**: Creating objects without specifying the exact class of the object that will be created. This is essential for maintaining flexibility and decoupling the code.
- **Strategy**: Defining a family of algorithms, encapsulating each one, and making them interchangeable. This pattern is invaluable for scenarios where multiple algorithms can be applied interchangeably.
- **Observer**: Establishing a one-to-many dependency between objects so that when one object changes state, all its dependents are notified, which is particularly useful in event-handling systems.
- **Decorator**: Dynamically attaching additional responsibilities to an object, providing a flexible alternative to subclassing for extending functionality.
- **Command**: Encapsulating a request as an object allows for parameterizing clients with queues, requests, and operations, which is instrumental in implementing undo/redo functionalities.
During hands-on sessions, participants were tasked with applying these design patterns and principles to existing codebases. AI tools like GitHub Copilot and ChatGPT were invaluable here, helping to identify code smells quickly and suggest ways to refactor them.
By focusing on Software Craftsmanship, participants recognized the immense benefits:
- **Enhanced Code Quality**: Resulting in cleaner, more efficient, and maintainable code.
- **Sustainable Development**: Making the codebase more straightforward to manage and extend over time.
- **Improved Team Collaboration**: Ensuring a shared understanding and maintaining high standards among all team members.
## Hands-On Exercises and Practical Applications
The end of the course focused on hands-on exercises, which were essential for ensuring participants could apply what they learned in real-world scenarios. By actively engaging with AI tools like GitHub Copilot and ChatGPT, participants gained practical experience and confidence in integrating these technologies into their workflows.
We emphasized **prompt engineering** throughout the course, as it is crucial for effectively leveraging AI capabilities. Participants learned what makes a good prompt, how to write effective prompts, and different styles of prompts to meet various needs. This continuous practice ensured that participants could maximize the potential of AI tools, tailoring them to specific tasks and challenges.
Next, we tackled the **Task API project**. This pre-built mini-system allowed participants to practice their TDD and AI skills on a more complicated project than simple katas. The goal was to add a new feature to the system, using TDD/AI, providing practical experience in a realistic setting. The project contained examples of:
- **Controller Tests using a Test Client**: Demonstrating how to structure tests for API controllers.
- **Mocking**: Simulating interactions with dependencies to test isolated components.
- **Managing Data through Migrations**: Handling database schema changes effectively.
- **Creating Idempotent Tests for Database Interactions**: Ensuring tests remain reliable and repeatable, even with database changes.
With GitHub Copilot assisting in generating code snippets and offering suggestions for enhancing code quality, participants could focus on implementing new features efficiently. ChatGPT provided real-time coding advice and debugging assistance, further streamlining the development process. This hands-on project illustrated how AI tools could integrate into more complex development tasks, not just simple exercises.
We also emphasized collaborative coding exercises, such as **pair programming**. Participants worked in pairs to solve problems, share knowledge, and develop strategies. AI tools enhanced this collaborative approach by acting as virtual pair programmers and code reviewers, providing real-time feedback and improvements.
By the end of the course, participants were not only theoretically versed in the integration of AI tools but also practically equipped to enhance their software development processes. This hands-on experience ensured the lessons learned could be directly applied, paving the way for more innovative, efficient coding practices.
## Continuous Integration/Continuous Deployment
In our course, we dedicated much of our time to mastering continuous integration and continuous deployment (CI/CD), with valuable assistance from AI tools. CI/CD is crucial in modern software development, streamlining workflows and reducing errors while ensuring continuous feedback and high-quality code through automation.
We introduced **GitHub Actions**, a powerful and versatile tool for CI/CD pipelines. GitHub Actions integrates seamlessly with existing repositories, enhancing productivity and maintaining code quality. Participants quickly saw this tool's potential as they set up their CI/CD pipelines. With GitHub Copilot and ChatGPT, they navigated the complexities of CI/CD effortlessly.
One of the hands-on projects involved creating a complete CI/CD pipeline using GitHub Actions. AI tools meticulously guided this process, offering real-time code suggestions and troubleshooting tips. Participants defined workflow files using GitHub Copilot, which generated YAML files outlining different CI/CD stages. They then incorporated automated tests to ensure code quality, built and packaged applications, and automated deployment to environments such as staging and production. The presence of AI, particularly ChatGPT, and our custom GPT, Tyler Morgan, was instrumental in providing detailed insights and solving issues on the fly.
The practical session of setting up a project repository and configuring initial settings offered a tangible experience. With AI assistance, participants created workflow YAML files and ran initial builds and tests, witnessing the efficiency of automated processes firsthand. ChatGPT and Tyler provided the necessary support, ensuring everything ran smoothly and any roadblocks were swiftly addressed.
Throughout the course, we emphasized the many benefits of CI/CD. Participants experienced how CI/CD, enhanced by AI, creates a continuous feedback loop, offering timely insights on code changes and helping identify and address issues early. They saw how automating repetitive tasks with AI tools accelerated development cycles, fostering rapid iterations and improving code quality through consistent automated testing and validation. Simplified deployment processes, achieved with minimal manual intervention, reduced the risk of errors, and streamlined development efforts.
We didn't stop there. The course also covered advanced CI/CD topics, exploring how AI tools could further enhance these processes. Participants learned about automating more complex scenarios and intelligent error detection, integrating security checks into CI/CD pipelines, and ensuring compliance with industry standards and regulations.
Key takeaways from this section included best practices for setting up and maintaining CI/CD pipelines, strategies for scaling CI/CD workflows for larger teams and complex projects, and discussions on emerging trends in CI/CD that could shape the future of software development.
## Emergent Design and Legacy Code
We concluded with a critical discussion on emergent design and handling legacy code. These are often the most challenging yet rewarding aspects of software development. Emergent design emphasizes incrementally evolving your software architecture, keeping it adaptable and agile as the project grows and changes.
We started by introducing the concept of emergent design and highlighting its importance in maintaining software systems' flexibility and responsiveness. Instead of fully defining the architecture upfront, emergent design allows it to evolve naturally as new requirements emerge. This approach is particularly beneficial in dynamic environments where requirements frequently change, ensuring the software remains relevant and practical.
Vital to understanding emergent design are **Kent Beck's simple design principles**. We outlined these principles as:
- **Runs all tests**: Prioritizing a test suite that verifies the correctness of the system.
- **Contains no duplication**: Encouraging the elimination of redundant code to maintain simplicity and reduce bloat.
- **Expresses the intent of the programmer**: Writing code that is clear and understandable, reflecting the underlying purpose.
- **Minimizes the number of classes and methods**: Keeping the codebase lean and manageable by avoiding unnecessary complexity.
Implementing these principles in real projects can be transformative. Participants learned practical strategies for applying these principles, ensuring their code remains clean, resilient, and easy to modify.
We then tackled the perennial challenge of **legacy code**. Legacy systems are often outdated, complex, and challenging to maintain. We discussed common issues with legacy codebases and the daunting task of maintaining and enhancing old code. The key is to improve these systems incrementally without introducing new errors or breaking existing functionality.
Participants were introduced to techniques for safely refactoring legacy code. One effective strategy is the "Strangler Fig" pattern, which involves gradually replacing parts of the legacy system with new functionality. This method allows continuous improvement without a complete system overhaul, minimizing disruptions and spreading the workload.
Our hands-on sessions provided practical insights into refactoring legacy codebases. We walked through a step-by-step guide to refactoring a legacy system, demonstrating how to improve structure, readability, and maintainability. AI tools like GitHub Copilot and ChatGPT were invaluable here, assisting in identifying problem areas and suggesting effective refactoring tactics. These tools also helped ensure that any changes were safe and didn't introduce new issues.
We wrapped up this segment by discussing the overarching benefits of adopting emergent design and effectively managing legacy code:
- **Maintaining System Agility**: An adaptable codebase can more easily accommodate new requirements and changes.
- **Improved Code Quality**: Consistently applying refactoring techniques enhances system reliability and readability.
- **Legacy Systems Revival**: By transforming outdated, complex systems into manageable codebases, organizations can extend the life and value of their software.
Key takeaways from this section included gaining practical skills in refactoring and improving legacy systems, with a strong emphasis on continuous code and design enhancement. By the end of the course, participants recognized the critical role of emergent design and effective legacy code strategies in maintaining high-quality, sustainable software projects.
## Conclusion
As we wrapped up the "Intelligent Engineering with AI" course, it was clear that integrating AI tools into traditional software development practices is an intriguing possibility and a game-changing reality. This course journeyed through the transformative power of AI in every aspect of software engineering, from coding efficiencies to maintaining legacy systems, highlighting how these technologies can elevate individual and team productivity and code quality.
Starting with the profound capabilities of AI tools like GitHub Copilot and ChatGPT, we saw how these assistants could supercharge daily tasks. They automate code generation and debugging and act as intelligent collaborators, significantly reducing the time spent on repetitive tasks and enhancing precision and efficiency. Participants were empowered to harness these tools effectively, realizing how integral they can become in modern development workflows.
The course demonstrated the practical benefits of integrating AI with Test-Driven Development (TDD) through hands-on projects and real-world applications. Writing clean, reliable code became more manageable and intuitive, with AI tools guiding and supporting the process. By tackling exercises like the Fizz Buzz, Bowling Kata, and Gilded Rose, participants experienced firsthand the power of combining AI assistance with TDD principles to create robust and maintainable codebases.
The exploration of software craftsmanship underscored the importance of writing functional, elegant, and sustainable code. Design patterns like Singleton and Factory and principles like SOLID and DRY became part of the participants' toolkits, allowing them to craft code efficiently and proficiently. The focus on identifying and refactoring code smells, with AI assistance, further cemented the practice of continuous improvement and high standards.
Our deep dive into CI/CD processes, augmented by AI tools, revealed how automation can revolutionize development cycles. Setting up pipelines with GitHub Actions, participants automated testing, building, and deployment, streamlining their workflows and ensuring quick, reliable feedback on code changes. This practical knowledge positioned them to implement and optimize CI/CD pipelines in their projects, backed by the support of AI for even more efficient automation.
Finally, tackling emergent design and legacy code brought everything full circle. By learning to manage and improve legacy systems using techniques like the "Strangler Fig" pattern and Kent Beck's simple design principles, participants could see how even the most challenging aspects of software development could be approached methodically and effectively. AI tools played a crucial role in this process, providing insights and refactoring solutions that simplified and enhanced the task of maintaining system agility and code quality.
The essence of this course lies in the perfect harmony between human ingenuity and AI assistance. By embracing AI tools, the participants increased their productivity and significantly enhanced the quality and maintainability of their code. This course was not just an educational experience but a look into the future of software engineering, where AI and human creativity work side by side.
As we look ahead, thinking about the limitless possibilities is exciting. The skills and knowledge gained here are just the beginning. Whether it's writing new applications, refactoring old ones, or setting up sophisticated CI/CD workflows, the future of software development is brighter and more innovative with AI. The course has armed participants with the tools and insights to lead this exciting journey.
Thank you for joining this exploration of AI in software development. Together, we're paving the way for more intelligent, efficient, and creative engineering solutions. Here's to the future of clever engineering!
| dev3l |
1,913,401 | Securing Your APIs: A Guide to Design Patterns for Robust Defense | APIs (Application Programming Interfaces) are the backbone of modern software ecosystems. They enable... | 0 | 2024-07-06T05:01:36 | https://dev.to/kalyangottipati/securing-your-apis-a-guide-to-design-patterns-for-robust-defense-22af | microservices, api, security, designpatterns | APIs (Application Programming Interfaces) are the backbone of modern software ecosystems. They enable seamless communication between applications and data sources, driving innovation and collaboration. However, with this power comes a significant responsibility: ensuring the security of your APIs. Insecure APIs can be exploited by malicious actors, leading to data breaches, unauthorized access, and disrupted operations.
This article delves into the world of secure design patterns for API development. We'll explore established patterns that address common security concerns and equip you with the knowledge to build robust and trustworthy APIs.
**Why Design Patterns Matter for API Security**
Design patterns provide a structured approach to solving recurring problems. In the context of API security, they offer pre-defined solutions for common vulnerabilities, promoting consistency and reducing the likelihood of errors.
Here's how design patterns contribute to secure API development:
- **Reduce Complexity**: They simplify complex security concepts into reusable building blocks, making them easier to understand and implement.
- **Promote Consistency**: By following established patterns, developers ensure a consistent level of security across different parts of the API.
- **Minimize Errors**: Design patterns act as a safety net, reducing the risk of introducing security vulnerabilities due to human oversight.
- **Save Time & Resources**: Utilizing well-understood patterns accelerates development and saves time compared to building security solutions from scratch.
**Essential Design Patterns for Secure APIs**
Let's explore some key design patterns that address critical security aspects of APIs:
- **Authentication and Authorization:**
**Pattern**: OAuth 2.0 (https://www.scholarhat.com/tutorial/aspnet/what-is-oauth-secure-aspnet-core-app-oauth-2)
**Description**: OAuth 2.0 is an industry-standard framework for authorization. It allows users to grant third-party applications access to their data without revealing their credentials directly.
**Benefits**: Secure, scalable, and widely supported by various platforms and libraries.
**Pattern**: API Keys
**Description**: API keys are unique identifiers used to authenticate API requests. They are simple to implement but require careful management to prevent unauthorized access.
**Benefits**: Lightweight and easy to implement, suitable for simple APIs with limited access control needs.
- **Input Validation:**
**Pattern**: Input Sanitization
**Description**: This pattern involves filtering and sanitizing user input to prevent malicious code injection attacks like SQL injection and cross-site scripting (XSS).
**Benefits**: Protects against common web security vulnerabilities.
**Pattern**: Data Validation
**Description**: Data validation ensures that user-provided data adheres to expected formats and constraints.
**Benefits**: Improves data integrity and prevents unexpected system behavior.
- **Error Handling:**
**Pattern**: Secure Error Handling
**Description**: This pattern emphasizes providing minimal information in error messages to avoid exposing sensitive details about your API implementation.
**Benefits**: Reduces the risk of attackers exploiting error messages to gain insights into system vulnerabilities.
- **Data Encryption:**
**Pattern**: HTTPS
**Description**: Hypertext Transfer Protocol Secure (HTTPS) encrypts communication between the client and the server, protecting data in transit from eavesdropping and tampering.
**Benefits**: Essential for protecting sensitive data like passwords and financial information.
**Pattern**: Data at Rest Encryption
**Description**: This pattern involves encrypting data when it is stored in databases or other persistent storage mechanisms.
**Benefits**: Offers additional protection for sensitive data even if attackers gain access to the storage layer.
- **Rate Limiting and Throttling:**
**Pattern**: Rate Limiting
**Description**: Rate limiting restricts the number of API requests a user or application can make within a specific timeframe.
**Benefits**: Mitigates denial-of-service attacks and prevents API abuse.
**Pattern**: Throttling
**Description**: Throttling dynamically adjusts access based on predefined rules. It's more granular than rate limiting and can adapt to changing traffic patterns.
**Benefits**: Provides more flexibility in managing API traffic and preventing overloads.
**Putting it All Together: Implementing Secure Design Patterns**
Here are some key considerations for successfully implementing secure design patterns in your APIs:
**- Threat Modeling**: Identify potential security threats and vulnerabilities early in the development process. Choose design patterns that address the identified risks.
**- Context Matters**: The most suitable pattern depends on the specific needs of your API. Evaluate the complexity, access control requirements, and performance needs before selecting a pattern.
**- Consistent Application**: Apply the chosen design patterns consistently throughout your API development process for comprehensive security.
**- Testing and Security Audits**: Regularly test your API for vulnerabilities and conduct security audits to identify and address any potential weaknesses.
| kalyangottipati |
1,913,408 | Teste do Capítulo 2 | (Respostas pág 606) Por que Java especifica rigorosamente o intervalo e o comportamento de seus... | 0 | 2024-07-06T05:01:18 | https://dev.to/devsjavagirls/teste-do-capitulo-2-2690 | java, javaprogramming | (Respostas pág 606)
1. Por que Java especifica rigorosamente o intervalo e o comportamento de seus tipos primitivos?
2. Qual é o tipo de caractere usado em Java e em que ele é diferente do tipo de caractere usado por outras linguagens de programação?
3. Um valor boolean pode ter o valor que você quiser já que qualquer valor diferente de zero é verdadeiro. Verdadeiro ou falso?
4. Dada esta saída,
One
Two
Three
usando um único string, mostre a instrução println( ) que a produziu.
5. O que está errado neste fragmento?
```
for(i = 0; i < 10; i++) {
int sum;
sum = sum + i;
}
System.out.println("Sum is: " + sum);
```
6. Explique a diferença entre as formas prefixada e posfixada do operador de incremento.
7. Mostre como um AND de curto-circuito pode ser usado para impedir um erro de divisão por zero.
8. Em uma expressão, a que tipo são promovidos byte e short?
9. Em geral, quando uma coerção é necessária?
10. Escreva um programa que encontre todos os números primos entre 2 e 100
11. O uso de parênteses adicionais afeta o desempenho do programa?
12. Um bloco define um escopo?
| devsjavagirls |
1,911,144 | Ruto's Last Card of Goons | On Tuesday, July 2nd, 2024, protests erupted across Kenya, with reports of property destruction and... | 0 | 2024-07-04T05:59:56 | https://dev.to/mwacharo6/rutos-last-card-of-goons-1hp6 |
On Tuesday, July 2nd, 2024, protests erupted across Kenya, with reports of property destruction and looting in several counties, including Nairobi, Mombasa, and Kisumu. The protests, organized by the GENZ, aimed to address corruption, incompetence, and unfulfilled promises by the ruling government. The demonstrations were peaceful, but the government's response involved excessive use of force, resulting in several deaths.
The ruling government had three cards left: one, to call for negotiations; two, to continue with police brutality; and three, to hire goons to demolish property and injure, and even kill, people. The government called for negotiations with GENZ, but GENZ declined, citing the ruling party's dishonesty in negotiations as a common tactic.
As the saying goes, "Dawa ya moto ni moto" ("The remedy for fire is fire"). The ruling government hired goons through proxy means to counter peaceful demonstrators.
What next for GENZ? | mwacharo6 |
|
1,913,407 | Espaçamento e Parênteses em Expressões Java | Espaçamento em Expressões Tabulações e espaços podem ser usados para melhorar a legibilidade de... | 0 | 2024-07-06T04:58:44 | https://dev.to/devsjavagirls/espacamento-e-parenteses-em-expressoes-java-ggm | java | **Espaçamento em Expressões**
Tabulações e espaços podem ser usados para melhorar a legibilidade de expressões.
Exemplo:
```
x=10/y*(127/x);
x = 10 / y * (127 / x);
```
Ambas as expressões são iguais, mas a segunda é mais fácil de ler.
**Uso de Parênteses**
Parênteses aumentam a precedência das operações contidas dentro deles, semelhante à álgebra.
O uso de parênteses adicionais não causa erros nem retarda a execução da expressão.
Parênteses ajudam a deixar a ordem de avaliação mais clara.
**Exemplo de Legibilidade com Parênteses**
Expressão menos legível:
```
x = y / 3 - 34 * temp + 127;
```
**Expressão mais legível com parênteses:**
```
x = (y / 3) - (34 * temp) + 127;
```
**Recomendações**
Use espaçamento e parênteses para tornar o código mais legível e fácil de entender por outros programadores. | devsjavagirls |
1,913,406 | Crossing the Bridge: Migrating and Working Across Version Control Systems | The world of software development is a diverse landscape, and version control systems (VCS) reflect... | 0 | 2024-07-06T04:58:29 | https://dev.to/epakconsultant/crossing-the-bridge-migrating-and-working-across-version-control-systems-4a84 | version | The world of software development is a diverse landscape, and version control systems (VCS) reflect that diversity. While Git reigns supreme, developers might encounter projects using Subversion (SVN) or Mercurial. This article explores the art of migration and interoperability between these VCS, guiding you through repository conversion techniques, preserving history, and even working with repositories hosted in different systems simultaneously.
1. Charting the Course: Planning Your Migration
Migrating Away from Legacy Systems:
Moving codebases from SVN or Mercurial to Git unlocks the benefits of distributed workflows, branching strategies, and seamless collaboration. However, migration requires careful planning.
Understanding the Landscape:
- SVN: Offers limited branching capabilities and a linear history model. Migrating to Git requires converting branches and preserving commit messages.
- Mercurial: Shares similarities with Git in branching and merging. Migration might be smoother, but complexities can arise depending on the specific repository structure.
Tools for the Journey:
- Migration Tools: Dedicated tools like Git-SVN and hg-git facilitate the conversion process, automating much of the heavy lifting.
- Manual Conversion: While less common, for smaller repositories, manual conversion using command-line tools might be an option.
2. Bridging the Gap: Conversion Techniques and History Preservation
Migrating from SVN to Git:
- Git-SVN: This command-line tool streamlines the process. It analyzes the SVN repository, converting branches, tags, and commit messages into a Git-compatible format.
- Preserving History: Git-SVN attempts to maintain the original SVN commit history as closely as possible. However, some details might be lost in translation.
Migrating from Mercurial to Git:
- hg-git: Similar to Git-SVN, this tool helps convert Mercurial repositories to Git. It offers functionalities like branch mapping and commit message preservation.
- Mercurial's Advantages: Mercurial's branching structure closely resembles Git, making the conversion process more straightforward compared to migrating from SVN.
3. Working Across the Divide: Interoperability Strategies
The Challenge of Multiple VCS:
Imagine a scenario where you need to collaborate on a project that uses different VCS for different components. While not ideal, strategies exist to bridge this gap.
[Understanding of AWS networking concepts: AWS networking For Absolute Beginners](https://www.amazon.com/dp/B0CDSMGXX5)
Git Submodules:
- Git submodules allow you to embed a Mercurial or SVN repository as a subdirectory within your Git project.
- This enables you to work with the submodule using its native VCS commands while maintaining the overall project in Git.
4. A World of Options: Choosing the Right Approach
Migration vs. Fresh Start:
- For complex, heavily branched SVN repositories, a fresh start in Git might be more efficient.
- However, for smaller repositories, migration can be a viable option, especially if historical data preservation is crucial.
Interoperability Considerations:
- Working with submodules adds an extra layer of complexity. Consider the long-term maintenance implications before diving into this approach.
- Ideally, migrating all components to a single VCS fosters a more streamlined workflow.
The Future of Interoperability:
- While tools and techniques exist for migration and interoperability, striving for a unified VCS across your projects simplifies development and collaboration.
5. Conclusion: Embracing Change and Collaboration
Version control systems serve as the backbone of software development, and the ability to migrate between them or work across different platforms enhances flexibility. By understanding the migration process, available tools, and interoperability strategies, you can navigate the ever-evolving VCS landscape and ensure your development journey remains smooth and collaborative, regardless of the underlying version control system. Remember, the ultimate goal is to choose the approach that best aligns with your project's needs and fosters a seamless development workflow for your team.
| epakconsultant |
1,913,405 | Expressões em Java | Componentes de Expressões Operadores, variáveis e literais são componentes de... | 0 | 2024-07-06T04:54:29 | https://dev.to/devsjavagirls/expressoes-em-java-3f4k | java, javaprogramming | **Componentes de Expressões**
- Operadores, variáveis e literais são componentes de expressões.
- Expressões são similares às equações algébricas.
**Conversão de Tipos em Expressões**
- É possível usar diferentes tipos de dados em uma expressão se forem compatíveis (e.g., short e long).
- Tipos diferentes são convertidos para o mesmo tipo usando regras de promoção de tipos.
**Regras de Promoção de Tipos**
- Promoção a int:
Valores char, byte e short são promovidos a int.
- Promoção a long:
Se um operando for long, a expressão inteira é promovida a long.
- Promoção a float:
Se um operando for float, a expressão inteira é promovida a float.
- Promoção a double:
Se algum operando for double, o resultado será double.
**Efeitos da Promoção de Tipos**
- Promoções de tipos são aplicadas apenas durante a avaliação da expressão.
- A variável original mantém seu tipo após a avaliação.
- Promoções podem levar a resultados inesperados.
Exemplo de Promoção de Tipos
PromDemo.java
**Coerção em Operações com char**
Operações com char podem precisar de coerção devido à promoção a int:
```
char ch1 = 'a', ch2 = 'b';
ch1 = (char) (ch1 + ch2); // Coerção necessária para atribuir int a char
```
**Uso de Coerção para Divisão com Fração**
Coerção é útil para obter resultados fracionários em divisões:
exemplo> UseCast.java
**Pontos Importantes**
**Promoção de tipos:** altera temporariamente o tipo dos operandos para garantir a compatibilidade durante a avaliação da expressão.
**Coerção:** usada para converter explicitamente o resultado de uma expressão para um tipo específico, quando necessário.
| devsjavagirls |
1,913,404 | Finding Your Code's Home: Repository Management and Hosting | In the symphony of software development, code repositories act as the sheet music, meticulously... | 0 | 2024-07-06T04:53:19 | https://dev.to/epakconsultant/finding-your-codes-home-repository-management-and-hosting-m26 | repository | In the symphony of software development, code repositories act as the sheet music, meticulously storing and organizing your project's codebase. This article delves into the world of repository management and hosting, exploring the trade-offs between local and remote options, comparing key features, and guiding you through setting up repositories in popular platforms.
1. Local vs Remote Repositories: Choosing Your Fortress
Local Repositories: Self-Reliance with Limitations:
- Imagine a secure vault within your own computer, housing your project's code. This is the essence of a local repository.
- Advantages: Offers complete control over your codebase and eliminates dependence on external servers.
- Disadvantages: Limited collaboration capabilities, prone to data loss if your local machine fails, and requires manual backups.
Remote Repositories: Collaboration and Version Control in the Cloud:
- Cloud-based platforms like GitHub, GitLab, and Bitbucket provide a central repository for your code, accessible from anywhere.
- Advantages: Facilitate seamless collaboration, offer version control history, and often integrate with continuous integration and continuous delivery (CI/CD) tools for automated builds and deployments.
- Disadvantages: Relies on internet connectivity and introduces a dependency on the hosting platform's service and security.
Choosing the Right Approach:
- For small, personal projects, a local repository might suffice.
- However, for collaborative development, version control, and streamlined workflows, remote hosting platforms reign supreme.
2. Feature Face-Off: Access Control, Hooks, and CI/CD Integration
Access Control: Guarding Your Codebase:
- Both local and remote repositories offer access control functionalities.
- Local repositories rely on operating system permissions to restrict access.
- Remote platforms provide granular user access controls, allowing you to define permissions for read-only access, code contributions, and administrative actions.
Hooks: Automating Tasks at Key Points:
- Hooks are scripts that run automatically at specific events within a repository, such as a commit or push.
- Local repositories might require manual setup of hooks.
- Remote platforms often offer built-in hooks or integrations with external services for tasks like code formatting, automated testing, or deployment triggers.
CI/CD Integration: Streamlining the Pipeline:
- Continuous integration and continuous delivery (CI/CD) is a development practice that automates code building, testing, and deployment.
- Many remote hosting platforms integrate seamlessly with CI/CD tools, allowing developers to configure automated pipelines for streamlined development workflows.
- Local repositories typically require manual integration with external CI/CD tools.
3. Setting Up Your Repository: A Practical Guide
Initializing a Local Repository with Git:
- Open a terminal and navigate to your project directory.
- Run the command git init to create a new Git repository.
- Your project directory now holds a hidden .git folder containing the repository metadata.
Creating a Remote Repository on GitHub:
- Create a free GitHub account (or log in if you have one).
- Click "New repository" and provide a name and description for your project.
- GitHub provides instructions to link your local repository to the newly created remote repository.
[The Beginner Guide to Setup Global Content Delivery Network (CDN) on AWS](https://www.amazon.com/dp/B0CK76D87S)
Pushing Your Local Code to GitHub:
- In your terminal, run git remote add origin <remote_repository_URL> (replace <remote_repository_URL> with the actual URL provided by GitHub).
- Run git push origin main to push your local codebase (on the "main" branch) to the remote repository on GitHub.
4. Conclusion: A Symphony of Collaboration
Effective repository management fosters collaboration, streamlines workflows, and ensures code security. By understanding the trade-offs between local and remote repositories, leveraging the features of hosting platforms like access control and CI/CD integration, and following setup procedures, you can ensure your code has a secure and well-managed home, paving the way for a harmonious development experience. Remember, choosing the right approach depends on your project's needs and your development style. So, select your platform, configure your workflows, and watch your development journey reach new heights of collaboration and efficiency.
| epakconsultant |
1,913,403 | Unveiling the Truth: Is SEO Dead or Alive in the Digital Era? | The digital landscape is ever-changing, and the role of Search Engine Optimization (SEO) has been a... | 0 | 2024-07-06T04:47:07 | https://dev.to/apptagsolution/unveiling-the-truth-is-seo-dead-or-alive-in-the-digital-era-18ob | is, seo, dead, alive | The digital landscape is ever-changing, and the role of Search Engine Optimization (SEO) has been a topic of much debate. As an experienced digital marketer, I've witnessed the transformative power of SEO in driving organic traffic and business growth. However, the persistent question remains: is SEO still relevant in the modern era, or has it become a relic of the past?
In this comprehensive article, we'll explore the truth behind the rumors and uncover the undeniable importance of SEO in the digital era. We'll delve into the evolving landscape of SEO, debunk the myth of its demise, and examine the critical role it plays in driving organic traffic and aligning with other digital marketing strategies.
The Importance of SEO in the Digital Era
In the digital age, where online presence is paramount, SEO has become the cornerstone of any successful digital marketing strategy. By optimizing your website and content for search engines, you can increase your visibility, attract targeted traffic, and ultimately drive conversions.
SEO is not just about ranking higher on search engine results pages (SERPs); it's about understanding your target audience, their search intent, and providing them with the most relevant and valuable information. In a world where consumers are constantly searching for solutions to their problems, being the go-to resource can give your business a significant competitive advantage.
Debunking the Myth: Is SEO Dead?
The notion that SEO is dead has been circulating for years, but the reality is quite different. While the tactics and strategies of SEO have evolved, its core principles and importance remain unchanged. Search engines, particularly Google, are continuously refining their algorithms to provide users with the most relevant and high-quality content.
Rather than viewing SEO as a standalone tactic, it's essential to recognize it as an integral part of a comprehensive digital marketing strategy. By aligning your SEO efforts with other channels, such as social media, content marketing, and paid advertising, you can create a synergistic approach that amplifies your overall online presence and effectiveness.
The Role of SEO in Driving Organic Traffic
One of the primary benefits of SEO is its ability to drive organic traffic to your website. By optimizing your content, website structure, and technical elements, you can improve your search engine rankings and increase the visibility of your brand. This organic traffic is particularly valuable as it consists of users who are actively searching for the products, services, or information you provide.
Organic traffic not only boosts your website's visibility but also enhances the quality of your leads and conversions. These users are often more engaged, have a higher intent to purchase, and are more likely to become loyal customers. Investing in SEO can, therefore, be a cost-effective way to attract and retain a targeted audience.
The Impact of Google Algorithm Updates on SEO
Google's search algorithm is constantly evolving, and these updates can have a significant impact on SEO strategies. From the introduction of Panda and Penguin to the more recent Helpful Content and Passage Ranking updates, search engines have become increasingly sophisticated in their ability to identify and prioritize high-quality, user-centric content.
As an SEO professional, I closely monitor these algorithm changes and adapt my strategies accordingly. By staying up-to-date with the latest trends and best practices, I can ensure that my clients' websites remain competitive and continue to rank well in search results.
The Changing Face of SEO: From Keywords to User Intent
The traditional approach to SEO, which focused primarily on keyword optimization, has evolved significantly in recent years. Search engines have become more adept at understanding user intent and delivering results that cater to the specific needs and queries of the searcher.
Instead of solely focusing on keywords, modern SEO requires a deeper understanding of your target audience, their pain points, and the questions they're seeking to answer. By creating content that addresses these user intents, you can improve your relevance, engagement, and ultimately, your search engine rankings.
The Integration of SEO with Other Digital Marketing Strategies
Effective SEO cannot exist in a vacuum. To maximize its impact, it must be seamlessly integrated with other digital marketing strategies, such as content marketing, social media, and paid advertising. By aligning these channels, you can create a cohesive and powerful online presence that resonates with your target audience.
For example, by incorporating SEO best practices into your content marketing efforts, you can ensure that your high-quality, informative content is easily discoverable by your target audience. Similarly, by leveraging social media to amplify your SEO-optimized content, you can increase its reach and engagement.
The Future of SEO: Emerging Trends and Technologies
As the digital landscape continues to evolve, the future of SEO is poised to be shaped by emerging trends and technologies. From the rise of voice search and the increasing importance of user experience (UX) to the integration of artificial intelligence (AI) and machine learning, the SEO landscape is constantly shifting.
As an SEO expert, I'm continuously exploring these new developments and incorporating them into my strategies. By staying ahead of the curve and anticipating the changing needs of search engines and users, I can ensure that my clients' websites remain at the forefront of the digital landscape.
SEO Best Practices for the Digital Era
To succeed in the digital era, it's essential to adopt a comprehensive and adaptable SEO strategy. Here are some key best practices that I recommend:
Conduct Thorough Keyword Research: Identify the most relevant and high-intent keywords for your business, and optimize your content accordingly.
Prioritize User Intent: Understand the specific needs and queries of your target audience, and create content that addresses their pain points.
Optimize for Technical SEO: Ensure your website is technically sound, with fast loading times, mobile-responsiveness, and a clear site structure.
Leverage Content Marketing: Produce high-quality, informative content that not only engages your audience but also aligns with your SEO objectives.
Build Backlinks: Earn authoritative backlinks from reputable sources to enhance your website's credibility and domain authority.
Monitor and Adapt: Continuously track your SEO performance, analyze the impact of algorithm updates, and adjust your strategies accordingly.
Conclusion: The Undeniable Relevance of SEO in the Digital Landscape
In the ever-evolving digital landscape, SEO remains a crucial component of any successful online marketing strategy. While the tactics and techniques may have changed, the fundamental importance of SEO in driving organic traffic, enhancing brand visibility, and aligning with other digital marketing efforts is undeniable.
As an experienced SEO professional, I'm dedicated to helping businesses navigate the complexities of the digital era and unlock the full potential of their online presence. If you're ready to take your digital marketing strategy to new heights, [**hire SEO experts**](https://apptagsolution.com/hire-seo-expert/) from one of the best **[digital marketing company**](https://apptagsolution.com/digital-marketing-company/) AppTagsolution. | apptagsolution |
1,913,402 | Innovation and Quality: Shenzhen Qianke Textile Co., Ltd | Shenzhen Qianke Textile Co., Ltd. | Shenzhen Qianke Textile Co., Ltd is an entity devoted to... | 0 | 2024-07-06T04:46:44 | https://dev.to/julie_andersonv_6d4551eeb/innovation-and-quality-shenzhen-qianke-textile-co-ltd-2h4a | design | Shenzhen Qianke Textile Co., Ltd. |
Shenzhen Qianke Textile Co., Ltd is an entity devoted to providing top quality napkins along with the excellent customer service. They take pride in their innovation, quality, safety and the many benefits that set them apart from other companies on the market.
Advantages of Shenzhen Qianke Textile Co.
One of the leading advantages of Shenzhen Qianke Textile Co. is that it prides itself on a wide selection lines to choose from. Fabrics, yarns to towels and bed sheets, they have it all. Besides diversity, they provide different colors and sizes as well as the pattern to satisfy every need of their consumers.
Quality Products:
What sets Shenzhen Qianke Textile Co. Apart from its products is Quality of the highest order Their items are made with state-of-the-art technology and equipment focused on manufacturing that makes their Throw blanket products incredibly strong, long-lasting as well as offers extraordinary performance which guarantees customer happiness.
Innovative Practices:
Operating An Air Force Base: DifferencesBetween Economic Development For And By Military MembersIn Rural Vs. Urban Areas & A Case On Shenzhen Qianke Textile Co.: Leading The Team In Innovation Of Manufacture(different Business Operations To Gain Insights)& Colonizing Fast Ways From Competition They continually work to improve their processes, and enhance the quality of what they provide by doing research 5 Write fresh text Perhaps most importantly for Celiathen.
Priority on Safety:
Considering the prime regard for safety in textile products, Shenzhen Qianke Textile Co. simply gives it a top priority. All their products are rigorously tested to make sure they are safe. In this aspect, they not only sustain quality but preserve the environment using non-toxic and eco-friendly materials.
Versatile Usage:
These are highly versatile products spun for countless applications, designed by Shenzhen Qianke Textile Co. Their bed sheets, towels and materials are used in homes, offices, hospitals hotels. Additionally, their yarns are well-suited for knitters and crocheters, whereas their fabrics make them fantastic options in apparel sewing with convenience & excellent material under one roof.
Ease of Use:
The products are easy to use and carry, from Shenzhen Qianke Textile Co. Sheets and Bath Towel/ bathrobe are machine washable, fabrics can be washed by hand or laundry. Following the best care practices guarantees the shelf life and also saves certain aspects of their originality.
Exceptional Customer Service:
We at Shenzhen Qianke Textile pride ourselves on delivering you the best customer service experience. The highly experienced team of professionals is available to take all the calls and offer in-depth solutions to help their customers. Providing 24/7 assistance, customer satisfaction is always first.
Uncompromising Quality:
Shenzhen Qianke Textile Co. They use high quality materials, the most modern technology as well as equipment to maintain a European level of the products. The quality of their products is apparent as they withstand the test wash after wash.
Diverse Applications:
And products from Shenzhen Qianke Textile Co., Ltd. Their bed sheets and towels have a place in everything from homes to commercial establishments like hotels, hospitals etc. Their design materials are aimed to produce clothing and textile products, whilst their yarn promotes knitting and crochet hobbies with no end.
Concluding Thoughts:
Ultimately, Shenzhen Qianke Textile Co. is such a pulse that admires innovative quality service and customer safety as one company. Because of their wide Bedding sets product portfolio and high focus on customer service, they offer premium textiles which are suitable to meet every need. | julie_andersonv_6d4551eeb |
1,913,400 | Branching Out: Mastering Workflows in Git, SVN, and Mercurial | Version control systems (VCS) empower developers to collaborate seamlessly. A key component of this... | 0 | 2024-07-06T04:44:10 | https://dev.to/epakconsultant/branching-out-mastering-workflows-in-git-svn-and-mercurial-1nec | git | Version control systems (VCS) empower developers to collaborate seamlessly. A key component of this collaboration is branching and merging. This article dives into the world of branching and merging across Git, Subversion (SVN), and Mercurial, exploring their capabilities, common branching strategies, and the nitty-gritty of resolving merge conflicts.
1. Branching 101: Diverging Paths
Branching Explained:
Imagine a road leading to your software's final destination. Branching allows you to create temporary detours from the main road (known as the "trunk" or "master" branch) to explore new features, bug fixes, or experimental changes without affecting the main codebase.
Branching in Git, SVN, and Mercurial:
- Git: Git excels in branching and merging. Developers can create, switch, and merge branches with ease. Git even allows for complex branching strategies like rebasing.
- SVN: SVN offers limited branching functionality. While you can create branches, merging them back into the main codebase can be cumbersome, especially with frequent commits.
- Mercurial: Similar to Git, Mercurial provides robust branching capabilities. Developers can create and manage branches locally, facilitating a flexible development workflow.
2. Branching Strategies: Charting Your Course
Feature Branches:
- Ideal for developing new features in isolation. Create a dedicated branch for each feature, work on it independently, and merge it back into the main branch once complete.
- This approach minimizes the risk of introducing bugs to the main codebase.
Release Branches:
- Used to prepare a specific release version. Create a branch from the main codebase, fix bugs and perform final testing before merging it back and tagging it as a release.
- This allows for bug fixes and minor adjustments without impacting ongoing development.
Hotfix Branches:
- Critical for addressing urgent bugs in production. Create a hotfix branch from the release branch, fix the bug, and merge it back to both the release and main branch.
- This ensures the fix reaches both deployed users and ongoing development.
3. Merging the Streams: Bringing it Together
Merging Explained:
Once you've completed work on a branch, you need to integrate your changes back into the main codebase. This is where merging comes in. It combines the changes from your branch with those on the main branch, creating a unified codebase.
[Learn YAML for Pipeline Development : The Basics of YAML For PipeLine Development](https://www.amazon.com/dp/B0CLJVPB23)
Merging in Git:
- Git provides powerful merge commands and tools to visualize and resolve merge conflicts (conflicting changes in the same lines of code).
- Git can automatically handle simple merges, but developers might need to manually resolve conflicts using a text editor.
Merging in SVN:
- Merging in SVN is considered more complex and error-prone compared to Git or Mercurial.
- SVN offers limited merge conflict detection and resolution functionalities.
Merging in Mercurial:
- Mercurial offers a user-friendly merging experience similar to Git.
- It highlights potential conflicts and provides tools to assist developers in resolving them.
4. Conflict Resolution: Untangling the Knots
Merge Conflicts Demystified:
Merge conflicts arise when changes are made to the same lines of code on both the branch and the main codebase. VCS tools typically highlight these conflicts, requiring developers to manually decide which version to keep.
Resolving Conflicts in Git:
- Git offers a merge tool and visual aids to help developers identify and resolve conflicts within their text editor.
- Understanding the conflict markers and resolving them line by line is crucial.
Resolving Conflicts in SVN and Mercurial:
- Both SVN and Mercurial offer basic conflict resolution tools, often relying on manual editing and merging within a text editor.
- Compared to Git, these tools might require more manual effort from developers.
5. Branching and Merging: A Collaborative Powerhouse
Mastering branching and merging empowers developers to:
- Work Independently: Developers can work on different features simultaneously without affecting each other's code.
- Experimentation: Explore new ideas and features in isolation before integrating them into the main codebase.
- Efficient Bug Fixing: Address bugs and release fixes quickly through targeted branches.
Understanding the strengths and weaknesses of branching and merging in different VCS allows you to choose the right tool for your project and streamline your development workflow. Remember, effective branching and merging practices foster collaboration, ensure code quality, and pave the way for a successful development journey. | epakconsultant |
1,913,399 | Tente Isto 2-2 Tabela-Verdade para os Operadores Lógicos | Neste projeto, você criará um programa em Java que exibe a tabela-verdade dos operadores lógicos. O... | 0 | 2024-07-06T04:42:35 | https://dev.to/devsjavagirls/tente-isto-2-2-tabela-verdade-para-os-operadores-logicos-12b4 | java, javaprogramming | Neste projeto, você criará um programa em Java que exibe a tabela-verdade dos operadores lógicos. O objetivo é garantir que as colunas da tabela fiquem alinhadas usando tabulações. O projeto também demonstra a diferença de precedência entre o operador aritmético + e os operadores lógicos.
Passos para Criar o Programa
**Criação do Arquivo:**
Crie um novo arquivo chamado LogicalOpTable.java.
**Alinhamento de Colunas:**
Use a sequência de escape \t para inserir tabulações em cada string de saída.
Por exemplo, a instrução System.out.println("P\tQ\tAND\tOR\tXOR\tNOT"); exibe o cabeçalho da tabela.
**Posicionamento dos Resultados:**
Use tabulações em cada linha subsequente para que o resultado de cada operação fique alinhado com o título apropriado.
**Código Completo:**
Insira o código a seguir no arquivo LogicalOpTable.java:
Os parênteses ao redor das operações lógicas são necessários devido à precedência dos operadores Java. O operador + tem precedência mais alta do que os operadores lógicos.
| devsjavagirls |
1,913,398 | Branching Out: Understanding Distributed vs. Centralized Version Control Systems | Version control systems (VCS) are the unsung heroes of software development. They track changes to... | 0 | 2024-07-06T04:37:43 | https://dev.to/epakconsultant/branching-out-understanding-distributed-vs-centralized-version-control-systems-1aaj | Version control systems (VCS) are the unsung heroes of software development. They track changes to code, allowing developers to collaborate, revert to previous versions, and maintain a clear history of their project's evolution. But within the VCS realm, two main philosophies dominate: distributed and centralized systems. This article explores the key differences between these approaches, their advantages and disadvantages, and when each might be the optimal choice for your project.
1. Centralized Systems: A Single Source of Truth
Centralized VCS (CVS) in a Nutshell:
Imagine a fortress housing the one and only copy of your project's codebase. This central server acts as the sole source of truth in a Centralized Version Control System (CVS), with tools like Subversion (SVN) being a prime example.
Working with a Central Repository:
- Developers make changes to their local copies of the codebase.
- To share their work, they "commit" their changes to the central server, updating the official version.
- This sequential workflow ensures everyone works on the latest code version stored on the server.
Advantages of Centralized VCS:
- Simplicity: Easy to learn and use, especially for beginners.
- Centralized Access Control: Server administrators can manage user permissions and enforce access control.
- Branching Capabilities: Limited branching functionality is available in some CVS tools.
Disadvantages of Centralized VCS:
- Single Point of Failure: If the central server goes down, development comes to a screeching halt.
- Offline Limitations: Limited functionality when working offline, as developers rely on the server to commit changes.
- Slower Performance: Large codebases and frequent commits can lead to performance bottlenecks on the central server.
2. Distributed Systems: Power in Your Hands
Distributed VCS (DVCS) Redefined:
Distributed Version Control Systems (DVCS) like Git and Mercurial revolutionized the way developers manage code. Instead of relying on a central server, each developer has a complete copy of the codebase on their local machine.
Working with Local Repositories:
- Developers work with their local copy, making changes and committing them to their local repository.
- They can freely branch and merge changes without affecting the central repository (which can be a remote server or another developer's machine).
Advantages of Distributed VCS:
- Offline Functionality: Developers can work productively even without an internet connection.
- Resilience: Distributed copies act as backups, mitigating the risk of data loss due to server failure.
- Speed and Efficiency: Local commits are much faster than pushing changes to a central server.
- Branching Power: DVCS excels at branching and merging, enabling developers to work on multiple features simultaneously.
Disadvantages of Distributed VCS:
- Complexity: Learning curve steeper than CVS, especially for managing branches and remote interaction.
- Decentralized Management: Requires more discipline from developers to maintain consistency across local repositories.
- Security Considerations: Access control can be more complex to manage compared to a centralized server.
[The Lucrative Path to Becoming a Successful Notary Loan Signing Agent](https://www.amazon.com/dp/B0D8LLR31S)
3. Choosing the Right VCS: It Depends
The optimal VCS choice depends on your project's needs and team structure. Here are some scenarios to consider:
When a Centralized VCS Might Shine:
- Small, Simple Projects: For small teams working on a single codebase, CVS offers a user-friendly and straightforward solution.
- Strict Access Control: If managing user permissions and access control is paramount, centralized control offered by CVS might be preferable.
- Limited Technical Expertise: Teams new to version control might find the simplicity of CVS a good starting point.
When a Distributed VCS Takes the Lead:
- Large, Complex Projects: For geographically dispersed teams working on a large codebase, the offline capabilities and branching power of DVCS are invaluable.
- Focus on Speed and Efficiency: When rapid development cycles and frequent commits are crucial, DVCS offers a performance edge.
- Open Source Projects: The collaborative nature of open-source development thrives on the distributed workflows and branching capabilities of DVCS.
4. Conclusion: A Spectrum, Not a Choice
Distributed and centralized VCS are not mutually exclusive. Some teams might adopt a hybrid approach, using a centralized server for backups while leveraging the branching power of DVCS for development. Ultimately, the best VCS choice empowers your team to collaborate effectively, manage code efficiently, and build a solid foundation for your project's success. | epakconsultant |
|
1,913,397 | Should I stick to Mern or move to java | Hi folks, I am kind of very much confused about the current job market demand as a developer what... | 0 | 2024-07-06T04:35:14 | https://dev.to/coddiekrishna/should-i-stick-to-mern-or-move-to-java-4h5n | Hi folks, I am kind of very much confused about the current job market demand as a developer what should I focus on ? I have very much knowledge and experience in the mern stack but due to some listening to some yt videos and searching on LinkedIn about Mern stack and java developer I saw that there are more jobs in Java development than Mern itself. I want to stick to Mern but things boil down to which tech stack has more opportunities.
| coddiekrishna |
|
1,913,396 | Dive into the Cutting-Edge of Multi-Task and Meta-Learning 🚀 | Explore state-of-the-art multi-task learning and meta-learning algorithms in this graduate-level Stanford course, with a focus on coding problems and a course project. | 27,844 | 2024-07-06T04:29:54 | https://dev.to/getvm/dive-into-the-cutting-edge-of-multi-task-and-meta-learning-35a8 | getvm, programming, freetutorial, universitycourses |
As a graduate student passionate about the latest advancements in machine learning, I'm thrilled to share with you an incredible opportunity to explore the world of multi-task learning and meta-learning.
## Introducing the Stanford CS 330 Course: "Deep Multi-Task & Meta Learning"
This graduate-level course, offered by the prestigious Stanford University, delves into the cutting-edge of these exciting fields. Taught by renowned experts, the course promises to be a transformative experience for anyone interested in conducting research on multi-task learning and meta-learning.
### What You'll Learn 🧠
The course covers a wide range of state-of-the-art algorithms and techniques, including self-supervised pre-training, meta-learning methods, and curriculum and lifelong learning. Through a combination of in-person lectures, coding assignments, and a course project, you'll have the chance to dive deep into the fundamentals and practical applications of these topics.
### Why You Should Enroll 🤩
This course is an exceptional opportunity for students who want to push the boundaries of their knowledge and contribute to the advancement of these cutting-edge fields. With a focus on coding problems and a hands-on course project, you'll have the chance to apply what you've learned and gain valuable practical experience.
## Get Ready to Embark on an Exciting Journey 🚀
If you're ready to take your machine learning skills to the next level, I highly recommend checking out the Stanford CS 330 course on "Deep Multi-Task & Meta Learning." You can find more information and enroll at the course website: [https://cs330.stanford.edu/](https://cs330.stanford.edu/).
Get ready to dive into the world of multi-task learning and meta-learning, and let's explore the future of machine learning together! 🌟
## Supercharge Your Learning with GetVM Playground 🚀
To truly master the concepts covered in the Stanford CS 330 course on "Deep Multi-Task & Meta Learning," I highly recommend taking advantage of the GetVM Playground. This powerful online coding environment allows you to seamlessly apply what you've learned and experiment with the latest multi-task learning and meta-learning algorithms.
With GetVM Playground, you can dive right into the course content and put your knowledge into practice. The intuitive interface and pre-configured coding environment eliminate the hassle of setting up your local development setup, allowing you to focus solely on the learning experience. 🧠
By utilizing the GetVM Playground, you'll be able to run code, test hypotheses, and explore the course materials in a hands-on, interactive way. This practical approach will deepen your understanding of the concepts and help you develop the skills needed to become a true expert in these cutting-edge fields of machine learning. 💻
Don't miss out on this incredible opportunity to enhance your learning journey. Visit the GetVM Playground at [https://getvm.io/tutorials/cs-330-deep-multi-task-and-meta-learning-fall-2019-stanford-university](https://getvm.io/tutorials/cs-330-deep-multi-task-and-meta-learning-fall-2019-stanford-university) and start your adventure in multi-task learning and meta-learning today! 🚀
---
## Practice Now!
- 🔗 Visit [Deep Multi-Task & Meta Learning | Stanford University CS 330](https://cs330.stanford.edu/) original website
- 🚀 Practice [Deep Multi-Task & Meta Learning | Stanford University CS 330](https://getvm.io/tutorials/cs-330-deep-multi-task-and-meta-learning-fall-2019-stanford-university) on GetVM
- 📖 Explore More [Free Resources on GetVM](https://getvm.io/explore)
Join our [Discord](https://discord.gg/XxKAAFWVNu) or tweet us [@GetVM](https://x.com/getvmio) ! 😄 | getvm |
1,911,744 | Elixir Task, Task.Supervisor - Another way to work with Elixir process | Intro If you just jump to Elixir from other languages, process & supervisor is one of... | 0 | 2024-07-06T04:29:02 | https://dev.to/manhvanvu/elixir-task-tasksupervisor-another-way-to-work-with-elixir-process-5d70 | elixir, task, supervisor | ## Intro
If you just jump to Elixir from other languages, process & supervisor is one of many things you need to understand to fully take advance of Elixir.
For newbie can work easy with process, Elixir provides `Task` & `Task.Supervisor` to help us work with Elixir process.
## Task
`Task` is high level abstract to work with process. We can create a process to execute a task and get result without boilerplate code (for spawn & get result).
Not same as `GenServer` (much more simply) `Task` just provides a simple way to execute a function (anonymous fn or define in a module). We must care our state & loop function if need a long-run task.
`Task` is quite simple for both cases, using directly or define a module.
For start directly we can use like:
```Elixir
# create a task in other process.
task = Task.async(fn ->
# execute a task.
end)
# do something.
# get result
result = Task.await(task)
```
We can use `await_many` for case we need to wait two or more tasks.
We can see a flow to create & wait a task:
We can see to execute a function as process and get result is only in two functions call.
Remember our task create by `Task.async` will linked with current process (parent) then if task is crashed or current process is crashed other process will die follow (if we don't want a link, can use `async_nolink` in `Task.Supervisor`).
We can use task as a child in supervisor by simple `use Task` in our module like:
```Elixir
defmodule PermanentTask do
use Task, restart: :permanent
def start_link(arg) do
Task.start_link(__MODULE__, :run, [arg])
end
def run(arg) do
# ...
end
end
```
Then we can add to our supervisor like:
```Elixir
Supervisor.start_link([
{PermanentTask, arg}
], strategy: :one_for_one)
```
As we see, if we need add a simple task then `Task` can help us reduce complex things like self define process or implement a `GenServer` for supervisor (I have other posts for explaining [GenServer](https://dev.to/manhvanvu/genserver-a-simple-way-to-work-with-elixir-process-364p) and [Supervisor](https://dev.to/manhvanvu/elixir-supervisor-a-powerful-thing-for-dev-devops-can-sleep-well-4ge7)).
`Task` can return a stream by using `async_stream` for case we need to work with stream.
For case we want to ignore we can call `ignore/1` to unlink a running task (task's still running).
For case we need check status of unlinked task we can use `yield/2` & `yield_many/2`.
## Task.Supervisor
Elixir provides a supervisor for `Task` to work & manage dynamically tasks (support to create remote tasks).
```Elixir
children = [
{Task.Supervisor, name: OurApp.TaskSupervisor}
]
Supervisor.start_link(children, strategy: :one_for_one)
```
And at runtime we can add async task like:
```Elixir
task = Task.Supervisor.async(OurApp.TaskSupervisor, fn ->
# execute a task.
end)
```
For case we need to create a lot of tasks we can use `Task.Supervisor` with partition to avoid bottleneck.
| manhvanvu |
1,913,395 | ⚡ MyFirstApp - React Native with Expo (P26) - Code Layout Login Phone Number | ⚡ MyFirstApp - React Native with Expo (P26) - Code Layout Login Phone Number | 27,894 | 2024-07-06T04:27:50 | https://dev.to/skipperhoa/myfirstapp-react-native-with-expo-p26-code-layout-login-phone-number-291k | react, reactnative, webdev, tutorial | ⚡ MyFirstApp - React Native with Expo (P26) - Code Layout Login Phone Number
{% youtube dGYUksXzzv8 %} | skipperhoa |
1,913,394 | ⚡ MyFirstApp - React Native with Expo (P25) - Code Layout Login Screen | ⚡ MyFirstApp - React Native with Expo (P25) - Code Layout Login Screen | 27,894 | 2024-07-06T04:26:38 | https://dev.to/skipperhoa/myfirstapp-react-native-with-expo-p25-code-layout-login-screen-4pcl | react, reactnative, webdev, tutorial | ⚡ MyFirstApp - React Native with Expo (P25) - Code Layout Login Screen
{% youtube rbuiA19mIno %} | skipperhoa |
1,913,393 | buatkan saya vidio kucing sambil minum kopi ditaman dengan ditemani kucing wanita yang sedang melihat taman disekitar | A post by A S | 0 | 2024-07-06T04:24:26 | https://dev.to/belink/buatkan-saya-vidio-kucing-sambil-minum-kopi-ditaman-dengan-ditemani-kucing-wanita-yang-sedang-melihat-taman-disekitar-16k3 | belink |
||
1,913,392 | Precedência de operadores | Aqui está um resumo da tabela de precedência dos operadores Java: Mais alta: Operadores de... | 0 | 2024-07-06T04:21:32 | https://dev.to/devsjavagirls/precedencia-de-operadores-p54 | java, javaprogramming | Aqui está um resumo da tabela de precedência dos operadores Java:
**Mais alta:**
Operadores de incremento e decremento pós-fixo (++, --).
Operadores de incremento e decremento prefixo, unários (+, -, ~, !), e coerção de tipo.
**Alta:**
Multiplicação, divisão, e módulo (*, /, %).
**Intermediária:**
Adição e subtração (+, -).
Deslocamentos de bits (>>, >>>, <<).
Comparações (>, >=, <, <=, instanceof).
Igualdade (==, !=).
**Baixa:**
AND bit a bit (&).
XOR bit a bit (^).
OR bit a bit (|).
AND lógico (&&).
OR lógico (||).
Operador ternário (?:).
A precedência de operadores refere-se à ordem em que as operações são realizadas dentro de uma expressão. Quando você escreve uma expressão com múltiplos operadores, a precedência determina quais partes da expressão são avaliadas primeiro. Isso é especialmente importante em expressões complexas para garantir que o resultado seja o esperado.
Exemplo de Precedência de Operadores
Considere a expressão:
```
int result = 3 + 5 * 2;
```
De acordo com a precedência dos operadores, a multiplicação (*) tem uma precedência mais alta do que a adição (+). Portanto, a expressão é avaliada como:
```
int result = 3 + (5 * 2); // result = 3 + 10
```
O resultado final é:
```
int result = 13;
```
**Outro Exemplo com Parênteses**
Se você quiser alterar a ordem de avaliação, pode usar parênteses para forçar uma ordem diferente:
```
int result = (3 + 5) * 2;
```
Neste caso, a adição é realizada primeiro porque os parênteses têm a precedência mais alta:
```
int result = 8 * 2; // result = 16
```
**Importância da Precedência de Operadores**
Compreender a precedência dos operadores é crucial para escrever expressões corretamente e evitar erros lógicos no seu código. Isso garante que as operações sejam realizadas na ordem desejada sem a necessidade de parênteses desnecessários, tornando o código mais legível e eficiente.
| devsjavagirls |
1,913,045 | How to Connect Your GitHub Project to Sonar | Introduction This guide will walk you through setting up SonarCloud for a GitHub project... | 0 | 2024-07-06T04:17:02 | https://dev.to/olsido/how-to-connect-your-github-project-to-sonar-9ic | # Introduction
This guide will walk you through setting up SonarCloud for a GitHub project to automatically inspect code for bugs and vulnerabilities. Additionally, it covers common errors encountered during the setup process.
You can check out the GitHub repository used for this project here: [github-workflow-demo](https://github.com/olsido/github-workflow-demo).
# Difference between SonarCloud and SonarQube <a name="difference-between-sonar-cloud-and-sonar-qube"></a>
Sonar comes in two flavours - SonarCloud and SonarQube.
SonarCloud is a cloud-based service provided by SonarSource for continuous code quality and security inspection, ideal for projects hosted on GitHub, Bitbucket, or Azure DevOps. SonarQube, on the other hand, is a self-hosted solution that requires you to install and manage the server infrastructure, offering greater control and customization for larger or more complex projects. Both tools provide similar functionalities for analyzing code quality but cater to different hosting and infrastructure preferences.
We will use SonarCloud in this tutorial.
# What are GitHub Actions and Workflows?
GitHub Actions is a powerful automation tool integrated into GitHub, enabling users to create custom software development workflows directly within their repositories. Workflows are defined in YAML files and can be triggered by various events, such as code commits, pull requests, or scheduled times. These workflows can include multiple jobs and steps to automate tasks like building, testing, and deploying code, thus streamlining the development and CI/CD (Continuous Integration/Continuous Deployment) processes.
# Connecting Your Project to SonarCloud
Please have a look at this tutorial for detailed steps on how to establish a connection between your project on GitHub and SonarCloud: [How to Enable SonarCloud for Your Project](https://dev.to/olsido/how-to-enable-sonarcloud-for-your-project-aoi).
# Setting Up a Sonar Action - Easy Way
Creating an action for automated SonarCloud checks seems very straightforward. Here is how GitHub suggests doing it...
Click on the "Actions" menu:
...then search for a Sonar action template:
We already discussed the difference between SonarCloud and SonarQube in an [earlier chapter](#difference-between-sonar-cloud-and-sonar-qube).
So, for our purposes, we are going to pick "SonarCloud." Click on the "Configure" button:
GitHub will create the workflow file for you in the correct directory in your repository, which you want to connect to SonarCloud. As you can see, it has some suggestions for next steps for you in the header of the file (enclosed in the red rectangle below), followed by the instructions in YAML format:
Theoretically, if you follow the steps, it will work. Of course, in the real world, each application is different and requires adjustments to this out-of-the-box script (as did my application - I will describe this below).
But first, let's follow the steps and see what we get.
The first two steps just tell us to connect our project to SonarCloud, which we did in [How to Enable SonarCloud for Your Project](https://dev.to/olsido/how-to-enable-sonarcloud-for-your-project-aoi) mentioned above.
So, let's do step number 3.
Let's go to our SonarCloud application and click on "Information:"
We can copy our Project Key and Organization Key from the Information screen:
...and then paste them in the appropriate place in the YAML config file:
To generate the token, let's go to "My Account:"
...and then, in the "Security" tab, enter the name for the token and click on "Generate Token:"
It will generate your token, and as it says - you need to copy it right away because it will not show it to you anymore:
Then go back to GitHub, "Security" tab, Secrets and variables > Actions, and click on the "New repository secret:"
It says your secret should be named "SONAR_TOKEN." Enter your secret name and value (from your clipboard), and click "Add secret:"
Commit your YAML file to the repository:
Once you commit the workflow file, your project should be set up with Sonar. You can now go to the "Actions" tab and look at your first workflow.
# Issues
As I mentioned before, I had a few issues with that out-of-the-box setup, and most of those issues will be applicable to anyone who attempts it. So, read on.
## Disabling Automatic Analysis
My first workflow run resulted in a failure:
When we drill into the error, we will see the following:
The issue here is that, when you first configure SonarCloud, it by default enables automatic analysis. But once you configure it to be executed as part of a GitHub workflow, you will need to go to SonarCloud and disable that automatic analysis, so now it will only be analyzed once GitHub sends that request to SonarCloud.
To disable automatic analysis, in SonarCloud, go to Administration > Analysis Method:
...and switch off the toggle:
One issue down. Now the workflows succeed:
## SCM Provide Detection Failed
In SonarCloud, I see a warning:
When I click on "See details," I see the following:
To fix that warning, go to Administration > General Settings:
Then, in "SCM" tab, "Key of the SCM provider for this project" - enter "git" and click "Save:"
After adding some code to the repository to actually give it some work, I started seeing new errors in the workflow.
## Not inside a Git work tree: /github/workspace
This is the next error that I got. It indicates that SonarCloud is not recognizing the directory as a Git repository. This usually happens when the Git repository is not properly checked out or initialized in the workspace. You will need to update the workflow file to ensure the repository is checked out correctly. Add the following steps before the "Analyze with SonarCloud" step:
## Input required and not supported: distribution
This next error that I got indicates that the "actions/setup-java@v2" action requires the `distribution` input, which specifies the Java distribution to be installed. To fix this issue, we need to provide the `distribution` input in the "actions/setup-java@v2" step:
## Your project contains .java files, please provide compiled classes...
After fixing the above errors, I got this next one:
The error message indicates that your project contains *.java files and requires compiled classes to be provided with the `sonar.java.binaries` property, or these files need to be excluded from the analysis using the `sonar.exclusions` property.
To address this issue, I added this property into my `sonar-project.properties`:
```
sonar.java.binaries=target/classes
```
I set "target/classes" as the value because I have a Maven project.
I also added the compilation with Maven:
After that, my workflow was successful:
But is that all?
## Configuring `sonar-maven-plugin`
I had an issue with the workflow being successful - actually, I introduced a Sonar bug on purpose in my code and wanted the workflow to fail because of this - but it was successful.
The log gave me a warning that SonarCloud recommends using `sonar-maven-plugin` instead of the regular SonarCloud workflow setup for Maven projects. So, I added the plugin to my pom.xml:
...and then removed all the template SonarCloud configuration and used `sonar-maven-plugin` instead:
That went well and got rid of the warning; however, the workflow was still successful, despite a Sonar bug in the code.
## Sonar Quality Gate Passed When It Shouldn't
Here is the Sonar issue that I introduced on purpose:
And my workflow was successful:
I looked at SonarCloud, and amazingly, Sonar didn't consider my code to be an issue! The quality gate passed:
However, in "small type," it does say that the issue is that there are too few lines of code in my project (it is just a small sample project):
So, I increased the number of lines - I generated that same issue 10 times:
Then I was able to see the quality gate fail:
However, the workflow still succeeded:
But this is the subject of the next subsection.
## Workflow Should Fail When Sonar Analysis Is Not Successful
To make the workflow fail wherever the quality gate fails, we need to add a step in our GitHub Actions workflow that checks the quality gate status after the SonarCloud analysis is complete. This can be done using the SonarCloud API.
I added the following lines to the YAML file to do that:
That worked, and the workflow failed. If you drill down to the failure, it will tell you the reason - the failure is because the quality gate didn't pass:
I also got a failure email to the email account associated with my GitHub repo:
# Conclusion
By following this guide, you can successfully set up SonarCloud to automatically analyze your GitHub project for bugs and vulnerabilities. Implementing these steps ensures that your code quality and security are maintained, helping you catch issues early in the development process. As a next step, you can explore more advanced SonarCloud features and further customize your workflows. | olsido |
|
1,913,360 | Importance of Knee Point Voltage of Current Transformer | Importance of Knee Point Voltage of Current Transformer Introduction Current Transformers (CTs) play... | 0 | 2024-07-06T04:14:48 | https://dev.to/electricalvolt/importance-of-knee-point-voltage-of-current-transformer-2d68 | electrical, current | **Importance of Knee Point Voltage of Current Transformer**
**Introduction**
Current Transformers (CTs) play a vital role in electrical power systems, primarily used for measuring and monitoring high current levels and providing necessary inputs to protective relays and metering devices. One of the critical parameters defining the performance of a CT is the Knee Point Voltage (KPV). Understanding the [KPV of CT](https://www.electricalvolt.com/how-to-calculate-knee-point-voltage-of-current-transformer/) is crucial for ensuring the accurate and reliable operation of protection systems. This article delves into the significance of the Knee Point Voltage in CTs, exploring its definition, implications for CT performance, and its role in various applications.
**Definition of Knee Point Voltage****
The Knee Point Voltage (KPV) is a specific voltage level on the excitation curve of a CT, where a small increase in voltage results in a significant increase in magnetizing current. Technically, it is the voltage at which a 10% increase in applied voltage results in a 50% increase in the magnetizing current. This rapid increase indicates the onset of core saturation. The KPV is a critical factor in determining the CT’s capability to accurately transform high current levels without distortion, especially during fault conditions.
The Role of Knee Point Voltage in CT Performance**
**Accuracy and Saturation**
The primary function of a CT is to transform high primary currents to lower, manageable secondary currents accurately. This transformation must be linear and proportional across a wide range of operating conditions. The accuracy of this transformation is essential for both metering and protective relaying. However, when the voltage across the CT’s secondary winding exceeds the KPV, the core starts to saturate. Saturation causes the CT to lose its linearity, leading to distorted and inaccurate current measurements. This distortion can have severe implications, especially in protection systems where precise current measurement is critical for detecting faults and initiating protective actions.
**Protective Relaying**
[Protective relays](https://www.electricalvolt.com/what-is-a-protective-relay-principle-advantages-applications/) rely on accurate current measurements to detect and respond to fault conditions such as overcurrent, short circuits, and [ground faults](https://www.electricalvolt.com/what-is-ground-fault-and-earth-fault/). If a CT saturates during a fault condition, it may not provide an accurate representation of the primary current, leading to delayed or incorrect relay operation. This can result in inadequate protection, potentially causing damage to equipment and posing safety hazards. By ensuring that the [current transformer](https://www.electricalvolt.com/current-transformer-construction-phasor-and-errors/) operates below its KPV, especially during fault conditions, the integrity and reliability of the protection system are maintained.
**Determining Knee Point Voltage**
**Excitation Curve**
The KPV of a CT is determined from its excitation curve, which plots the relationship between the applied voltage and the resulting magnetizing current. This curve typically has a linear region at lower voltages, followed by a sharp bend where the core starts to saturate. The KPV is identified at this bend point. Manufacturers provide the excitation curve data, allowing engineers to select a CT with an appropriate KPV for their specific application.
**Standard Testing**
Standard testing procedures, such as those outlined by IEEE and IEC, are used to determine the KPV of CTs. These tests involve applying increasing voltage levels to the CT and measuring the corresponding magnetizing current. The KPV is then identified based on the standard definition.
**Importance in Various Applications**
**Power System Protection**
In power system protection, CTs are essential for detecting abnormal conditions and initiating protective actions to isolate faults and prevent equipment damage. The KPV is critical in ensuring that CTs provide accurate current measurements under all operating conditions, including fault scenarios. Protective relays depend on these measurements to make decisions, and any distortion due to CT saturation can lead to incorrect or delayed responses, compromising system reliability and safety.
**Metering**
Accurate metering of electrical power consumption is vital for billing and monitoring purposes. CTs used in metering applications must maintain high accuracy across their operating range. While metering CTs typically operate below the KPV under normal conditions, understanding the KPV helps in designing systems that ensure continued accuracy during transient conditions, such as inrush currents or temporary overcurrents.
**High Fault Current Scenarios**
In industrial and utility settings, electrical systems can experience extremely high fault currents. CTs must accurately measure these high currents to ensure proper relay operation. Selecting a CT with an appropriate KPV ensures that even under high fault current conditions, the CT remains within its linear operating range, preventing saturation and maintaining measurement accuracy.
**Practical Considerations**
**CT Selection**
Selecting the right CT involves considering various factors, including the maximum expected fault current, system voltage, and the required accuracy class. Understanding the KPV is crucial in this selection process. Engineers must ensure that the chosen CT can handle the maximum secondary voltage without saturating, thus maintaining its performance and reliability.
System Design
In system design, engineers must account for the placement and configuration of CTs to minimize the risk of exceeding the KPV. This involves ensuring proper burden (load) on the CT secondary, avoiding excessive lead lengths, and using appropriate CT ratios. Proper system design helps in optimizing CT performance and extending its operational lifespan.
Maintenance and Testing
Regular maintenance and testing of CTs are essential to ensure their continued reliability. Testing the excitation characteristics and verifying the KPV during periodic maintenance helps in identifying any degradation in CT performance. Timely replacement of CTs showing signs of deterioration ensures that the protection system remains effective.
Conclusion
The Knee Point Voltage (KPV) of a Current Transformer (CT) is a fundamental parameter that significantly impacts its performance, especially in protective relaying and high fault current scenarios. Understanding and correctly applying the concept of KPV ensures that CTs operate within their linear range, providing accurate and reliable current measurements. This accuracy is essential for the proper functioning of protection systems, preventing equipment damage, and ensuring safety. Engineers must consider KPV in CT selection, system design, and maintenance practices to achieve optimal performance and reliability in electrical power systems. | electricalvolt |
1,913,361 | HOWS team submit for the [Wix Studio Challenge ] | This is a submission for the Wix Studio Challenge . What I Built My team had two goal in... | 0 | 2024-07-06T04:13:40 | https://dev.to/how_play_b3ae0596a8622c2c/hows-team-submit-for-the-wix-studio-challenge--1gnn | devchallenge, wixstudiochallenge, webdev, javascript | *This is a submission for the [Wix Studio Challenge ](https://dev.to/challenges/wix).*
## What I Built
<!-- Share an overview about your project. -->
- My team had two goal in every wix studio project. Fast in mobile and unbelievable in wix.
- This time we try to take the challenge on making custom mini-cart, and custom ecom site with recommend products based on user-actions, and make sure it should load within 2s for every action even the cart in mobile, in safari.
- Bonus mission is to use css to make our website become more stunning than editorX env.
## Demo
<!-- Share a link to your Wix Studio app and include some screenshots here. -->
https://howplayhk.wixstudio.io/me-vibe
Remark, since the wix-ads banner on top will affect to some css setup. plz add command **_?inbizmgr=true_** after the url.
## Development Journey
<!-- Tell us how you leveraged Wix Studio’s JavaScript development capabilities-->
<!-- Which APIs and Libraries did you utilize? -->
- As we mentioned in the overview, we want to **_improve the experience on speed_**. Therefore, we try to combine **_the special feature in wix, dataset_** and **_communicate with other api like formatting dataset currentItem_** and **_push data to the mini-cart to cut the loading time_**.
- Since we also try to revamp the shopping flow in wix. Therefore, no matter product detail page or inside the mini-cart. We also include the **_calculation with 3 layers recommendation products_**.
---->>> empty cart * recommend features products
---->>> having products * below free shipping amount * recommend accessories
---->>> Free shipping amount in cart * recommend recent products
- We used wix-store data instead of just custom a new one using cms, it is difficult, since data in _**wix-store api**_ will hide with permission even we can see it in cms, but they cannot use.
- We used lots of _**data hooks, and events.js**_ to finish the challenge.
- We keep the usage in simple when we handle to clients, they don't need to study a dictionary to learn how to use their website even 80 years old can easy to use it. We want client feel the new env with wix, and all the friendly setup is still there.
- In this creation, clients only need to learn how to use automation discount and coupon code, they can master the sales in using wix-store, and they can easy to add new sales channel in wix to amazon, ebay, since products already ready to expand the business in the catalog in wix.
<!-- Team Submissions: Please pick one member to publish the submission and credit teammates by listing their DEV usernames directly in the body of the post. -->
- Team: HOWS
- Team Leader: How Play, wolkxrider_hows
<!-- Don't forget to add a cover image (if you want). -->
<!-- Thanks for participating! → | how_play_b3ae0596a8622c2c |
1,913,359 | The first 90 days | ** My Ideas for Advancing in the New Work Area** Dream Fulfilled: Initially, working in the... | 0 | 2024-07-06T04:10:08 | https://dev.to/camila_arruda_ec496aeea5c/the-first-90-days-3f34 | career, careerdevelopment, challengecareer | > **
> **My Ideas for Advancing in the New Work Area****
1. **Dream Fulfilled:**
- Initially, working in the investment field was a dream come true for me, especially as an economist.
- My prior experience in data & analytics allowed me to quickly contribute to the team.
2. **Communication and Guidance:**
- Now, I can communicate better with people and assist them in decision-making.
- This interaction provides me with more experience and brings me closer to my goal of becoming a coordinator.
3. **Engaging with Leadership:**
- Leadership has been receptive to my ideas and insights about the business.
- We are focused on improvement and achieving our objectives.
4. **Challenges and Learning:**
- Redefining the team's activities was an initial challenge.
- Despite difficulties, I sought support from colleagues and did my best.
5. **Autonomy and Contribution:**
- My leadership provides autonomy, responsibilities, and trust.
- Joining the climate team presents challenges, but my experience will be valuable.
6. **Ideas & Innovations:**
- I want to explore visual tools with modern indicators and dashboards, ensuring that as many people as possible can access data on AWS and use data manipulation tools and report creation to address their data-related pain points and generate insights.
- Staying updated on data governance and technology trends is crucial.
- Proposing new meeting formats, such as smaller groups with leaders, can strengthen our data agenda.
- Initiatives like in-person brainwriting forums, benchmark agendas, and a monthly delivery journal can drive the team forward.
- I also aim to contribute to agile methodology evolution and bridge the gap between technology and data leadership.
- Encouraging internal training and improving communication are vital goals, including advocating for a weekly study hour per person.
- Finding effective ways to ensure people read and understand relevant emails remains a challenge.
- Collaborating on the evolution of analytics by design, especially with leadership, as they serve as the entry point for this topic among team members.
- Leveraging artificial intelligence to enhance creativity and efficiency, providing daily support.
- Enhancing internal processes by documenting critical information necessary for smooth operations, benefiting our clients and readers.
7. **People Development:**
- I contribute to the development of three individuals: two interns and one analyst seeking new challenges.
🚀😊
---
 | camila_arruda_ec496aeea5c |
1,905,889 | Setting up AWS S3 bucket locally using Localstack and Docker | With over 52,000 stars and 520+ contributors, LocalStack is an open-source tool that emulates a wide... | 0 | 2024-07-06T04:04:20 | https://dev.to/ajeetraina/setting-up-aws-s3-bucket-locally-using-localstack-and-docker-l6b |
[With over 52,000 stars and 520+ contributors](https://github.com/localstack/localstack), LocalStack is an open-source tool that emulates a wide range of AWS services on a local machine. It's primarily used for testing and development purposes, allowing developers to run applications locally without needing to interact with the actual AWS cloud.
LocalStack is a cloud development platform that solves the challenge of costly and slow cloud resource usage during development and testing of serverless applications. By providing a local environment that replicates AWS services, LocalStack helps developers ensure that their applications work correctly before deploying them to a live environment.
## Key features of LocalStack include:
- **Service Emulation**: It emulates various AWS services such as S3, DynamoDB, Lambda, API Gateway, SQS, SNS, CloudFormation, and more.
- **Local Development**: Developers can run AWS services locally, which speeds up development cycles and reduces costs associated with using AWS resources.
- **Consistency**: Ensures that the development environment closely mirrors the production environment on AWS, reducing discrepancies and potential issues during deployment.
- **Automation and CI/CD Integration**: LocalStack can be integrated into CI/CD pipelines, enabling automated testing of AWS-dependent code.
- LocalStack can be run using Docker, making it easy to set up and use on various platforms.
## Benefits of using Localstack:
- **Reduced Costs**: By emulating AWS services locally, LocalStack eliminates the need to constantly deploy to the cloud, saving you money on cloud charges.
- **Faster Development**: LocalStack lets you spin up services instantly on your machine, significantly speeding up development cycles compared to waiting for cloud deployments.
## Getting Started
You can directly start the LocalStack container using the Docker CLI. This method requires more manual steps and configuration, but it gives you more control over the container settings.
The first time you start localstack, it requires Docker daemon to be up and running on your system.
```
localstack start -d
__ _______ __ __
/ / ____ _________ _/ / ___// /_____ ______/ /__
/ / / __ \/ ___/ __ `/ /\__ \/ __/ __ `/ ___/ //_/
/ /___/ /_/ / /__/ /_/ / /___/ / /_/ /_/ / /__/ ,<
/_____/\____/\___/\__,_/_//____/\__/\__,_/\___/_/|_|
💻 LocalStack CLI 3.5.0
👤 Profile: default
[09:22:54] starting LocalStack in Docker mode 🐳 localstack.py:503
preparing environment bootstrap.py:1283
ERROR: '['docker', 'ps']': exit code 1; output: b'Cannot connect to the Docker daemon at unix:///Users/ajeetsraina/.docker/run/docker.sock. Is the docker daemon running?\n'
❌ Error: Docker could not be found on the system.
Please make sure that you have a working docker environment on your machine.
```
Install Docker Desktop on your system and now this time you will find that Localstack gets started successfully.
```
localstack start -d
__ _______ __ __
/ / ____ _________ _/ / ___// /_____ ______/ /__
/ / / __ \/ ___/ __ `/ /\__ \/ __/ __ `/ ___/ //_/
/ /___/ /_/ / /__/ /_/ / /___/ / /_/ /_/ / /__/ ,<
/_____/\____/\___/\__,_/_//____/\__/\__,_/\___/_/|_|
💻 LocalStack CLI 3.5.0
👤 Profile: default
[09:23:54] starting LocalStack in Docker mode 🐳 localstack.py:503
preparing environment bootstrap.py:1283
configuring container bootstrap.py:1291
starting container bootstrap.py:1301
[09:23:55] detaching bootstrap.py:1305
```
You can also start the Docker container simply by executing the following docker run command:
```
$ docker run --rm -it -p 4566:4566 -p 4510-4559:4510-4559 localstack/localstack
```
## List of AWS services that Localstack support
```
localstack status services
┏━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━┓
┃ Service ┃ Status ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━┩
│ acm │ ✔ available │
│ apigateway │ ✔ available │
│ cloudformation │ ✔ available │
│ cloudwatch │ ✔ available │
│ config │ ✔ available │
│ dynamodb │ ✔ available │
│ dynamodbstreams │ ✔ available │
│ ec2 │ ✔ available │
│ es │ ✔ available │
│ events │ ✔ available │
│ firehose │ ✔ available │
│ iam │ ✔ available │
│ kinesis │ ✔ available │
│ kms │ ✔ available │
│ lambda │ ✔ available │
│ logs │ ✔ available │
│ opensearch │ ✔ available │
│ redshift │ ✔ available │
│ resource-groups │ ✔ available │
│ resourcegroupstaggingapi │ ✔ available │
│ route53 │ ✔ available │
│ route53resolver │ ✔ available │
│ s3 │ ✔ available │
│ s3control │ ✔ available │
│ scheduler │ ✔ available │
│ secretsmanager │ ✔ available │
│ ses │ ✔ available │
│ sns │ ✔ available │
│ sqs │ ✔ available │
│ ssm │ ✔ available │
│ stepfunctions │ ✔ available │
│ sts │ ✔ available │
│ support │ ✔ available │
│ swf │ ✔ available │
│ transcribe │ ✔ available │
└──────────────────────────┴─────────────┘
```
## Creating a AWS S3 Bucket
Create an s3 bucket with LocalStack's awslocal CLI:
```
awslocal s3api create-bucket --bucket sample-bucket
{
"Location": "/sample-bucket"
}
```
## Listing the S3 Bucket
```
awslocal s3api list-buckets
{
"Buckets": [
{
"Name": "sample-bucket",
"CreationDate": "2024-06-29T17:56:46.000Z"
}
],
"Owner": {
"DisplayName": "webfile",
"ID": "75aa57f09aa0c8caeab4f8c24e99d10f8e7faeebf76c078efc7c6caea54ba06a"
}
}
```
## Listingthe items inside the bucket:
```
awslocal s3api list-objects --bucket sample-bucket
{
"RequestCharged": null
}
```
## Running Localstack using Docker Compose
```
services:
localstack:
container_name: "${LOCALSTACK_DOCKER_NAME:-localstack-main}"
image: localstack/localstack
ports:
- "127.0.0.1:4566:4566" # LocalStack Gateway
- "127.0.0.1:4510-4559:4510-4559" # external services port range
environment:
# LocalStack configuration: https://docs.localstack.cloud/references/configuration/
- DEBUG=${DEBUG:-0}
volumes:
- "${LOCALSTACK_VOLUME_DIR:-./volume}:/var/lib/localstack"
- "/var/run/docker.sock:/var/run/docker.sock"
```
## Starting the container
```
docker compose up
[+] Running 1/0
✔ Container localstack_demo Recreated 0.1s
Attaching to localstack-main
localstack-main |
localstack-main | LocalStack version: 3.5.1.dev
localstack-main | LocalStack build date: 2024-06-24
localstack-main | LocalStack build git hash: 9a3d238ac
localstack-main |
localstack-main | Ready.
```
## Creating a queue using SQS with LocalStack's awslocal CLI:
```
$ awslocal sqs create-queue --queue-name test-queue
```
Result:
```
{
"QueueUrl": "http://sqs.us-east-1.localhost.localstack.cloud:4566/000000000000/test-queue"
}
```
```
$ awslocal sqs list-queues
```
Result:
```
{
"QueueUrls": [
"http://sqs.us-east-1.localhost.localstack.cloud:4566/000000000000/test-queue"
]
}
```
## References:
- [LocalStack Slack Community](https://localstack.cloud/contact/)
- [LocalStack Discussion Page](https://discuss.localstack.cloud/)
- [LocalStack GitHub Issue tracker](https://github.com/localstack/localstack/issues)
| ajeetraina |
|
1,913,356 | Introduction to GitHub Actions: A Beginner's Guide | In today's fast-paced development environment, automation has become a crucial component of the... | 0 | 2024-07-06T04:02:10 | https://dev.to/mahendraputra21/introduction-to-github-actions-a-beginners-guide-19hn | githubactions, beginners, learning, github | In today's fast-paced development environment, automation has become a crucial component of the software development lifecycle. GitHub Actions is one such tool that has gained immense popularity for its ability to streamline workflows. In this beginner's guide, we'll explore what GitHub Actions is, why it's needed, how to implement it, its pros and cons, and wrap up with a conclusion.
---
## What is GitHub Actions?
GitHub Actions is an automation platform integrated directly into GitHub repositories. It allows you to automate workflows for various tasks, such as building, testing, and deploying code. Essentially, it enables developers to create custom workflows that are triggered by events in their GitHub repositories.
## Why Do We Need GitHub Actions?
Imagine you're a chef in a busy kitchen. Every time a new order comes in, you have to manually gather ingredients, cook the dish, and then serve it. This process can be time-consuming and prone to errors. Now, imagine you have an automated system that handles some of these steps for you, allowing you to focus on more critical tasks.
Similarly, in software development, repetitive tasks like running tests, building code, or deploying applications can be automated using GitHub Actions. This not only saves time but also reduces the risk of human error, allowing developers to focus on writing quality code.
## How to Implement GitHub Actions
Implementing GitHub Actions is like setting up a recipe in your kitchen. Here's a step-by-step guide to get you started:
1. **Create a Workflow File:** In your GitHub repository, create a directory called `.github/workflows`. Inside this directory, create a new file with a `.yml` extension (e.g., `main.yml`).
2. **Define Your Workflow:** In your workflow file, define the triggers, jobs, and steps. For example:
```yaml
name: CI
on: [push, pull_request]
jobs:
build:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- name: Set up Node.js
uses: actions/setup-node@v2
with:
node-version: '14'
- name: Install dependencies
run: npm install
- name: Run tests
run: npm test
```
3. **Commit and Push:** Commit your workflow file to the repository and push it to GitHub. GitHub Actions will automatically trigger the workflow based on the defined events.
---
## Pros and Cons of Using GitHub Actions
Like any tool, GitHub Actions comes with its own set of advantages and disadvantages.
**Pros:**
- **Seamless Integration:** GitHub Actions is built into GitHub, providing a seamless experience for users.
- **Customizable Workflows:** You can create highly customizable workflows to fit your specific needs.
- **Community Support:** There is a large community of developers contributing to GitHub Actions, providing a wide range of pre-built actions.
- **Scalability:** It scales with your project, whether you're working on a small project or a large enterprise application.
**Cons:**
- **Learning Curve:** There can be a learning curve for beginners unfamiliar with YAML syntax and CI/CD concepts.
- **Complexity:** For very complex workflows, managing multiple workflows and dependencies can become challenging.
- **Cost:** While GitHub Actions is free for public repositories, there can be costs associated with using it for private repositories, depending on the usage.
## Conclusion
GitHub Actions is a powerful tool that can significantly enhance your development workflow by automating repetitive tasks. Its seamless integration with GitHub, customization capabilities, and robust community support make it a valuable addition to any developer's toolkit. While there may be a learning curve, the benefits it offers in terms of efficiency and reliability far outweigh the initial challenges. Whether you're a seasoned developer or just starting, GitHub Actions is worth exploring to streamline your development processes.
| mahendraputra21 |
1,913,353 | Os primeiros 90 dias | Minhas Ideias para Evoluir na Nova Área de Trabalho Sonho Realizado: Inicialmente, trabalhar na... | 0 | 2024-07-06T03:51:55 | https://dev.to/camila_arruda_ec496aeea5c/os-primeiros-90-dias-317 | job, career, changemanagement, beginners |
**Minhas Ideias para Evoluir na Nova Área de Trabalho**
1. **Sonho Realizado:**
- Inicialmente, trabalhar na área de investimentos foi um sonho para mim, especialmente por ser economista.
- Minha experiência prévia em dados & analytics me permitiu contribuir rapidamente com a equipe.
2. **Comunicação e Direcionamento:**
- Agora, consigo me comunicar melhor com as pessoas e ajudá-las nas tomadas de decisão.
- Essa interação me proporciona mais experiência e me aproxima do objetivo de me tornar coordenadora.
3. **Interação com a liderança:**
- A liderança tem sido receptiva às minhas ideias e percepções sobre o negócio.
- Estamos focados em melhorar e atingir nossos objetivos.
4. **Desafios e Aprendizado:**
- Redefinir as atividades da equipe foi um desafio inicial.
- Busquei apoio de colegas e fiz o meu melhor, mesmo com as dificuldades.
5. **Autonomia e Contribuição:**
- Minha liderança me proporciona autonomia, responsabilidades e confiança.
- A entrada no time de clima apresenta desafios, mas minha experiência será valiosa.
6. **Ideias & evoluções:**
- Quero explorar ferramentas visuais com indicadores e painéis modernos, e que o máximo de pessoas saibam consultar dados na AWS e que saibam usar ferramentas de manipulação de dados e criação de relatórios que resolvam suas dores em obter dados e geração de insights.
- Acompanhar as novidades em governança de dados e tecnologias é essencial.
- Propor novos formatos de reuniões, como grupos menores com líderes, pode fortalecer nossa agenda de dados.
- Iniciativas como fóruns presenciais de brainwriting, agendas de benchmark e um jornal mensal de entregas podem impulsionar a equipe.
- Também desejo contribuir para a evolução da metodologia ágil e aproximar as áreas de tecnologia e diretoria de dados.
- Incentivar a capacitação interna e melhorar a comunicação são metas importantes, e convencer os líderes de implantarem uma quantidade de horas de estudo por semana por pessoa.
- Encontrar maneiras eficazes de garantir que as pessoas leiam e compreendam e-mails relevantes é outro desafio.
- Colaborar na evolução da agenda de analytics by design, principalmente lara a liderança, pois eles serão a porta de entrada do assunto para os colaboradores.
- Uso de inteligência artificial para aumento da criatividade e assertividade, sendo apoio nas atividades diárias.
- Melhorar os processos internos, documentando tudo o que é mais importante e necessário para o andamento das atividades e para que nossos clientes e leitores tenham todas as informações necessárias rapidamente.
7. **Desenvolvimento de pessoas:**
- Contribuição e apoio no desenvolvimento de 3 pessoas: 2 estagiárias e 1 analista que busca novos desafios.
🚀😊
| camila_arruda_ec496aeea5c |
1,913,354 | call, apply, bind | call Why do we use call? We use call when we want to borrow a function from one object and... | 0 | 2024-07-06T03:46:17 | https://dev.to/__khojiakbar__/call-apply-bind-3m5p | javascript, call, apply, bind | ### **call**
**Why do we use call?**
We use **call** when we want to borrow a function from one object and use it with another object.
**What is call?**
**call** is a way to use a function with a different object, pretending that object owns the function.
**How does call work?**
You take a function from one object and call it with another object, telling the function, "Hey, use this other object as your **this**."
**Example:**
Imagine you have two friends, Alice and Bob. Alice knows how to introduce herself, but Bob doesn't. You can help Bob introduce himself using Alice's way.
```
const alice = {
name: 'Alice',
introduce: function(greeting) {
console.log(`${greeting}, my name is ${this.name}`);
}
};
const bob = { name: 'Bob' };
alice.introduce.call(bob, 'Hello'); // Output: Hello, my name is Bob
```
### **apply**
**Why do we use apply?**
We use **apply** for the same reason as **call**, but when we want to pass arguments as an array.
**What is apply?**
**apply** is similar to **call**, but it takes arguments in an array instead of individually.
**How does apply work?**
You take a function from one object and call it with another object, giving the arguments as an array.
**Example:**
Imagine you want to introduce Bob, but this time you want to say both "Hello" and "Nice to meet you" at once.
```
const alice = {
name: 'Alice',
introduce: function(greetings) {
const fullGreeting = [...greetings]
console.log(`${fullGreeting[0]}. My name is ${this.name}.
${fullGreeting[1]}`);
}
};
alice.introduce.apply(bob, ['Hello', 'Nice to meet you']); // Output: Hello, my name is Bob
```
### **bind**
**Why do we use bind?**
We use **bind** when we want to create a new function that always uses a specific object as **this**.
**What is bind?**
**bind** creates a new function that remembers which object should be **this** when it's called.
**How does bind work?**
You create a new version of a function that always uses the same **this** value.
**Example:**
Imagine you want to help Bob introduce himself later, but you want to make sure he does it the right way every time.
```
const bobIntroduce = alice.introduce.bind(bob);
bobIntroduce('Hi'); // Output: Hi, my name is Bob
bobIntroduce('Hey there'); // Output: Hey there, my name is Bob
```
**Summary with a Simple Story**
Imagine you have a magical talking toy named Toy that can say things. Toy belongs to Alice, and it can say her name. You have another toy that belongs to Bob, but it doesn't know how to talk.
**call:** You tell Toy, "Say Bob's name using your voice," and it says, "Hello, my name is Bob."
**apply:** You tell Toy, "Say Bob's name and also 'Nice to meet you' using your voice," and it says, "Hello, my name is Bob. Nice to meet you."
**bind:** You create a new version of Toy that always knows it's talking about Bob. Whenever you tell this new toy to talk, it says, "Hi, my name is Bob."
These magical talking toys are just like functions in JavaScript, and **call**, **apply**, and **bind** help you control which toy is talking!
| __khojiakbar__ |
1,913,352 | 🚀 TypeScript Roadmap 2024 Step By Step | TypeScript has become one of the most popular programming languages for web development, offering a... | 0 | 2024-07-06T03:34:06 | https://dev.to/sovannaro/typescript-roadmap-2024-step-by-step-9i4 | webdev, typescript, javascript, beginners | TypeScript has become one of the most popular programming languages for web development, offering a robust type system on top of JavaScript. This article will provide a detailed roadmap for learning TypeScript, from the basics to advanced concepts, ensuring you have a solid understanding of the language and its ecosystem.
## 1. Introduction to TypeScript
### What is TypeScript?
TypeScript is a statically typed superset of JavaScript that compiles to plain JavaScript. It adds optional static types, [classes](https://sovannaro.dev/what-are-classes-in-typescript/), and [interfaces](https://sovannaro.dev/what-are-interfaces-in-typescript/) to JavaScript, making it easier to write and maintain large-scale applications.
### Why Use TypeScript?
- **Type Safety**: Catch errors at compile time rather than runtime.
- **Improved IDE Support**: Enhanced autocompletion, navigation, and refactoring.
- **Better Code Readability**: Clearer and more maintainable code with explicit types.
- **Interoperability**: Seamlessly integrates with existing JavaScript code and libraries.
## 2. Setting Up TypeScript
### Installation
To get [started with TypeScript](https://sovannaro.dev/category/typescript/), you need to [install it globally using npm](https://sovannaro.dev/how-to-install-typescript/):
```bash
npm install -g typescript
```
### Setting Up a Project
[Create a new project](https://sovannaro.dev/including-javascript-code-in-typescript/) directory and initialize a `tsconfig.json` file:
```bash
mkdir my-typescript-project
cd my-typescript-project
tsc --init
```
The `tsconfig.json` file contains [compiler](https://sovannaro.dev/typescript-program-compile-and-run/) options and settings for your TypeScript project.
## 3. Basic TypeScript Concepts
### Types
Learn about the [basic types](https://sovannaro.dev/what-is-typescript/) in TypeScript:
- [**Primitive Types**](https://sovannaro.dev/what-is-built-in-type-in-typescript/): `string`, `number`, `boolean`, `null`, `undefined`
- [**Array Types**](https://sovannaro.dev/what-is-an-array-in-typescript/): `number[]`, `Array<number>`
- **[Tuple Types](https://sovannaro.dev/what-is-a-tuple-type-in-typescript/)**: `[string, number]`
- [**Enum Types**](https://sovannaro.dev/what-are-enums-in-typescript/): `enum Color { Red, Green, Blue }`
- **[Any Type](https://sovannaro.dev/what-is-any-type-in-typescript/)**: `any`
- **Void Type**: `void`
- **[Never Type](https://sovannaro.dev/what-is-a-never-type-in-typescript/)**: `never`
### [Type Inference](https://sovannaro.dev/what-is-interference-in-typescript/)
TypeScript can infer types based on the assigned values:
```typescript
let message = "Hello, TypeScript"; // inferred as string
```
### [Functions](https://sovannaro.dev/what-are-functions-in-typescript/)
Define functions with typed parameters and return types:
```typescript
function add(a: number, b: number): number {
return a + b;
}
```
### [Interfaces](https://sovannaro.dev/what-are-interfaces-in-typescript/)
Use interfaces to define the shape of objects:
```typescript
interface Person {
name: string;
age: number;
}
const john: Person = {
name: "John",
age: 30
};
```
## 4. [Advanced TypeScript Concepts](https://sovannaro.dev/understanding-advanced-types-in-typescript/)
### [Classes](https://sovannaro.dev/what-are-classes-in-typescript/)and [Inheritance](https://sovannaro.dev/what-is-inheritance-in-typescript/)
TypeScript supports [object-oriented programming](https://sovannaro.dev/object-oriented-programming-in-typescript/) with classes and inheritance:
```typescript
class Animal {
constructor(public name: string) {}
move(distance: number): void {
console.log(`${this.name} moved ${distance} meters.`);
}
}
class Dog extends Animal {
bark(): void {
console.log("Woof! Woof!");
}
}
const dog = new Dog("Buddy");
dog.bark();
dog.move(10);
```
### [Generics](https://sovannaro.dev/what-is-a-generic-class-in-typescript/)
Generics allow you to create reusable components:
```typescript
function identity<T>(arg: T): T {
return arg;
}
let output = identity<string>("Hello");
```
### [Modules](https://sovannaro.dev/what-are-typescript-modules/)
Organize your code using modules:
```typescript
// math.ts
export function add(a: number, b: number): number {
return a + b;
}
// main.ts
import { add } from './math';
console.log(add(2, 3));
```
### [Decorators](https://sovannaro.dev/property-decorators-in-typescript/)
Decorators are a special kind of declaration that can be attached to a class, method, accessor, property, or parameter:
```typescript
function log(target: any, key: string) {
console.log(`${key} was called`);
}
class Calculator {
@log
add(a: number, b: number): number {
return a + b;
}
}
```
## 5. TypeScript with Frameworks
### TypeScript with React
TypeScript can be used with React to build type-safe components:
```typescript
import React from 'react';
interface Props {
name: string;
}
const Greeting: React.FC<Props> = ({ name }) => {
return <h1>Hello, {name}!</h1>;
};
export default Greeting;
```
### TypeScript with Node.js
TypeScript can also be used for server-side development with Node.js:
```typescript
import express from 'express';
const app = express();
app.get('/', (req, res) => {
res.send('Hello, TypeScript with Node.js!');
});
app.listen(3000, () => {
console.log('Server is running on port 3000');
});
```
## 6. Testing TypeScript Code
### Unit Testing
Use testing frameworks like Jest or Mocha to write unit tests for your TypeScript code:
```typescript
// sum.ts
export function sum(a: number, b: number): number {
return a + b;
}
// sum.test.ts
import { sum } from './sum';
test('adds 1 + 2 to equal 3', () => {
expect(sum(1, 2)).toBe(3);
});
```
## 7. Best Practices
### Code Style
- Use consistent naming conventions.
- Prefer `const` and `let` over `var`.
- Use type annotations where necessary.
### Linting
Use a linter like ESLint to enforce coding standards:
```bash
npm install eslint @typescript-eslint/parser @typescript-eslint/eslint-plugin --save-dev
```
### Documentation
Document your code using JSDoc comments and TypeScript's built-in documentation features.
## 8. Resources for Further Learning
### Official Documentation
- [TypeScript Handbook](https://www.typescriptlang.org/docs/handbook/intro.html)
### Example Code
- [TypeScript Tutorials](https://github.com/SOVANNARO/typescript-tutorial)
### Community
- [TypeScript GitHub Repository](https://github.com/SOVANNARO/typescript-tutorial)
- [TypeScript Reddit Community](https://www.reddit.com/r/typescript/)
## Conclusion
By following this roadmap, you will gain a comprehensive understanding of TypeScript, from the basics to advanced concepts. TypeScript's powerful type system and modern JavaScript features make it an excellent choice for building robust and maintainable applications. Happy coding! | sovannaro |
1,913,333 | JavaScript NaN - advanced JS interview question | In JavaScript, NaN means "not a number." If you run typeof NaN // number you will get "number"... | 0 | 2024-07-06T03:31:47 | https://dev.to/finalgirl321/lets-talk-about-js-nan-advanced-js-interview-question-3b7a | In JavaScript, NaN means "not a number." If you run
`typeof NaN // number`
you will get "number" because NaN is used to define a number that really isn't a number.
Many times when we code we need to be sure that the data type we are working with is actually a number. JS has a built in method called isNaN that will accept any input and let you know if it's not a number. Let's take a look at a few examples:
```
isNaN(1) // false 1 is not not a number
isNaN("A") // true "A" is not number
isNaN("1") // false "1" is not not a number ..... wait what?
```
The string "1" is a number? That's what JS is telling us. But anything in quotation marks is for sure Not a Number because anything in quotation marks is a _string_. If you run `typeof "1"` you will get string. The thing to understand here is that isNaN is doing [implicit coercion](https://developer.mozilla.org/en-US/docs/Glossary/Type_coercion) "behind the scenes." It is first calling Number("1"), which turns "1" into 1, and then running isNaN(1).
```
isNaN(Number("1")) // false because it is a number now that it's been coerced.
```
Great, so basically isNaN isn't going to be very useful unless we are 100% sure of the input type, but in a [dynamically typed language](https://developer.mozilla.org/en-US/docs/Glossary/Dynamic_typing), how can you ever really be sure? That's exactly why we need a foolproof way to check. Is there a way to **_guarantee_** that some input is truly not a number? Yes, and we can really impress our interviewers by showing them our deep understanding of JS.
Firstly, in JS, anything compared to itself is true.
```
a = 1;
a === a; //true
b = "B";
b === b; // true
```
and NaN compared to anything else will be false.
```
NaN === 1 // false
NaN === false // false
NaN === "b" // false
```
Ok. So far so good. This makes perfect sense. So NaN compared to itself is going to be true then, right? Nope.
```
NaN === NaN //false
```
What? Ok, that's weird, but could we use this to our advantage to ensure something is a number? If we know that only in this one situation of something being NaN will the comparison to itself fail, we can simple compare any variable in question to itself with the !== operator and if we get "true" we know that our input is NaN.
```
a = 1
a !== a // false because 1 === 1
a = NaN
a !== a // true
```
If 'a' is anything other than NaN, the !== will **_always_** be false. But due to the strange truth that NaN === NaN is false, a !== a will be true.
Your deep knowledge of the inner workings of JS will surely impress! Now go use [Number.isNaN()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN). It's far more readable and understandable.
| finalgirl321 |
|
1,913,350 | Day 12 of Studying AWS | I successfully created a 2 GB EBS (Elastic Block Store) volume and attached it to my EC2 instance... | 0 | 2024-07-06T03:30:01 | https://dev.to/okalu2625/day-12-of-studying-aws-54fn |
I successfully created a 2 GB EBS (Elastic Block Store) volume and attached it to my EC2 instance (server). Then, I made a snapshot of the EBS and loaded a copy of that onto another instance I created.
| okalu2625 |
|
1,913,349 | Mastering Ninja Resource Management | In the ancient land of the rising sun, nestled among the majestic peaks of Mount Fuji, a hidden village of ninjas thrived. Here, the art of stealth, precision, and resourcefulness was honed to perfection. Among the elite ranks of this village stood Yuki, a renowned master of ninja weaponry. | 27,774 | 2024-07-06T03:24:46 | https://dev.to/labex/mastering-ninja-resource-management-eg4 | hadoop, coding, programming, tutorial |
## Introduction
This article covers the following tech skills:
In the ancient land of the rising sun, nestled among the majestic peaks of Mount Fuji, a hidden village of ninjas thrived. Here, the art of stealth, precision, and resourcefulness was honed to perfection. Among the elite ranks of this village stood Yuki, a renowned master of ninja weaponry.
Yuki's forge was a sight to behold, a testament to her unwavering dedication and ingenuity. From the finest steel, she crafted blades that could slice through the air with effortless grace, shuriken that could find their mark with pinpoint accuracy, and kunai that could pierce even the toughest armor.
However, Yuki's true mastery lay not only in her craftsmanship but also in her ability to manage the resources of the village. As the ninja clan grew, so did the demand for weapons and gear, and Yuki found herself tasked with ensuring that every ninja had access to the tools they needed, when they needed them.
It was in this pursuit that Yuki discovered the power of the Hadoop Resource Manager, a powerful tool that would allow her to efficiently allocate and manage the village's resources, ensuring that every ninja's mission was successful.
## Understanding the Hadoop Resource Manager
In this step, we will delve into the basics of the Hadoop Resource Manager and its role in the Hadoop ecosystem.
Firstly, switch the default user:
```bash
su - hadoop
```
The Hadoop Resource Manager is a crucial component of the YARN (Yet Another Resource Negotiator) architecture in Hadoop. It is responsible for managing the cluster's computational resources and scheduling applications across the available nodes.
To begin, let's explore the architecture of the Resource Manager:
```
+------------------+
| Resource Manager|
+------------------+
| Scheduler |
| ApplicationsMaster
| NodeManager |
+------------------+
```
The Resource Manager consists of three main components:
1. **Scheduler**: This component is responsible for allocating resources to the various running applications based on predefined scheduling policies.
2. **ApplicationsManager**: This component is responsible for accepting job submissions, negotiating the first container for executing the ApplicationMaster, and providing the service for restarting the ApplicationMaster container on failure.
3. **NodeManager**: This component runs on each node in the cluster and is responsible for launching and monitoring the containers assigned by the Scheduler.
To better understand the Resource Manager's functionality, let's explore a simple example.
Submit a sample MapReduce job to the cluster:
```bash
yarn jar /home/hadoop/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-3.3.6.jar pi 16 1000000
```
Check the status of the job:
```bash
yarn application -list
```
The output should look something like this:
```
2024-03-23 22:48:44,206 INFO client.DefaultNoHARMFailoverProxyProvider: Connecting to ResourceManager at /0.0.0.0:8032
Total number of applications (application-types: [], states: [SUBMITTED, ACCEPTED, RUNNING] and tags: []):1
Application-Id Application-Name Application-Type User Queue State Final-State Progress Tracking-URL
application_1711205220447_0001 QuasiMonteCarlo MAPREDUCE hadoop default RUNNING UNDEFINED
```
In this example, we submit a MapReduce job to the cluster using the `yarn` command. The Resource Manager receives the job request and assigns the necessary resources (containers) to run the job. We can then check the status of the job and view the logs using the provided commands.
## Configuring the Resource Manager
In this step, we will explore how to configure the Resource Manager to meet the specific needs of our ninja village.
The Resource Manager's behavior can be customized through various configuration properties. These properties are typically set in the `yarn-site.xml` file located in the Hadoop configuration directory (`/home/hadoop/hadoop/etc/hadoop`).
Let's view the 'yarn' configuration file and add some additional configurations for it:
```bash
vim /home/hadoop/hadoop/etc/hadoop/yarn-site.xml
```
Add the configurations:
```xml
<!-- Specify the scheduling policy -->
<property>
<name>yarn.resourcemanager.scheduler.class</name>
<value>org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler</value>
</property>
<!-- Configure the maximum number of applications to run concurrently -->
<property>
<name>yarn.scheduler.maximum-allocation-mb</name>
<value>8192</value>
</property>
<!-- Configure the minimum and maximum virtual cores per container -->
<property>
<name>yarn.scheduler.minimum-allocation-vcores</name>
<value>1</value>
</property>
<property>
<name>yarn.scheduler.maximum-allocation-vcores</name>
<value>4</value>
</property>
```
In this configuration file, we have set the following properties:
- `yarn.resourcemanager.scheduler.class`: Specifies the scheduling policy to use. In this case, we're using the Fair Scheduler, which ensures that resources are allocated fairly among applications.
- `yarn.scheduler.maximum-allocation-mb`: Sets the maximum amount of memory (in megabytes) that can be allocated to a single container.
- `yarn.scheduler.minimum-allocation-vcores` and `yarn.scheduler.maximum-allocation-vcores`: Defines the minimum and maximum number of virtual cores that can be allocated to a container, respectively.
To apply these configuration changes, we need to restart the Hadoop services.
## Monitoring and Managing Applications
In this step, we will learn how to monitor and manage applications running on the Hadoop cluster using the Resource Manager.
The Resource Manager provides a web user interface (UI) that allows you to monitor and manage the cluster's resources and running applications. To access the Resource Manager UI, open a web browser and navigate to `http://<resource-manager-hostname>:8088`.
In the Resource Manager UI, you will see various sections that provide information about the cluster, nodes, and applications. Here are some key features:
1. **Cluster Metrics**: This section displays the overall cluster metrics, such as the total available resources, the number of running applications, and the resource utilization.
2. **Node Managers**: This section lists all the active NodeManagers in the cluster, along with their status, available resources, and running containers.
3. **Running Applications**: This section shows the currently running applications, their progress, resource usage, and other details.
4. **Application History**: This section provides a historical view of completed applications, including their logs and metrics.
To demonstrate how to manage applications using the Resource Manager UI, let's submit a new application to the cluster.
```bash
# Submit a WordCount job to the cluster
yarn jar /home/hadoop/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-3.3.6.jar wordcount /home/hadoop/input /home/hadoop/output
```
This script submits a WordCount MapReduce job to the cluster. Before running the script, make sure to create the input directory and place some text files in it:
```bash
hdfs dfs -mkdir -p /home/hadoop/input
hdfs dfs -put /home/hadoop/hello.txt /home/hadoop/input
```
After submitting the job, you can monitor its progress and manage it from the Resource Manager UI. You can view the job's logs, kill the job if necessary, or check the output directory once the job completes.
View the Input file content:
```
hadoop:~/ $ hadoop fs -cat /home/hadoop/input/* [22:56:37]
hello labex
hello hadoop
hello spark
hello flink
```
View the Output file content:
```
hadoop:~/ $ hadoop fs -cat /home/hadoop/output/* [22:57:37]
flink 1
hadoop 1
hello 4
labex 1
spark 1
```
## Summary
In this lab, we explored the Hadoop Resource Manager, a powerful tool that enables efficient resource allocation and management in a Hadoop cluster. We delved into the architecture of the Resource Manager, learned how to configure it to meet specific needs, and discovered various techniques for monitoring and managing applications running on the cluster.
Through the journey of Yuki, the master ninja weaponsmith, we witnessed the transformative power of the Resource Manager in ensuring that every ninja had access to the tools they needed for successful missions. Just as Yuki mastered the art of resource management, we too can harness the capabilities of the Hadoop Resource Manager to optimize our big data processing workflows.
This lab not only provided hands-on experience with the Resource Manager but also instilled a deeper understanding of the Hadoop ecosystem and its versatile components. By embracing the principles of resource management and efficient scheduling, we can unlock new realms of data processing prowess and tackle even the most formidable big data challenges.
---
## Want to learn more?
- 🚀 Practice [Ninja Resource Management Mastery](https://labex.io/tutorials/hadoop-ninja-resource-management-mastery-288992)
- 🌳 Learn the latest [Hadoop Skill Trees](https://labex.io/skilltrees/hadoop)
- 📖 Read More [Hadoop Tutorials](https://labex.io/tutorials/category/hadoop)
Join our [Discord](https://discord.gg/J6k3u69nU6) or tweet us [@WeAreLabEx](https://twitter.com/WeAreLabEx) ! 😄 | labby |
1,913,272 | Deploying an Application on Azure: Guide | In today's world of cloud computing, Microsoft Azure stands out as one of the leading platforms... | 0 | 2024-07-06T00:33:57 | https://dev.to/paltadash/deploying-an-application-on-azure-guide-5680 | In today's world of cloud computing, Microsoft Azure stands out as one of the leading platforms enabling developers and businesses to deploy applications efficiently and at scale. This article will guide you through the essential steps to deploy an application on Azure, from initial setup to production deployment.
###Step 1: Creating an Azure Account
Before you begin, you'll need a Microsoft Azure account. If you don't have one yet, you can sign up at azure.microsoft.com and create a free or paid account depending on your needs.
###Step 2: Creating a Resource Group
In Azure, a Resource Group acts as a logical container that groups related resources for an application. Follow these steps to create one:
1. Sign in to the Azure Portal.
2. Click on "Create a resource" in the side menu.
3. Select "Resource group" and click on "Create".
4. Fill in the details such as the resource group name, region, and then click on "Review + Create" and finally on "Create".
###Step 3: Creating a Web Application (Example with Azure App Service)
Azure App Service allows you to deploy and scale web applications quickly and easily. To create one:
1. In the Azure Portal, select your newly created Resource Group.
2. Click on "Add" to add a new resource.
3. Search for "App Service" and select "Create".
4. Complete the details such as application name, development stack (e.g., .NET, Node.js), and service plan (consumption plan or an App Service plan).
5. Click on "Review + Create" and then on "Create".
###Step 4: Application Deployment
Once your App Service is configured, you can deploy your application:
1. Open the settings of your App Service from the Azure Portal.
2. In the "Deployment" section, choose the option that best fits your application (e.g., FTP, GitHub, Azure DevOps).
3. Follow the instructions to connect your repository or upload your
code.
###Step 5: Configuration and Management
Azure offers various tools to configure and manage your application:
- **Application Settings:** Adjust environment variables, connection settings, and more from the Azure Portal.
- **Monitoring and Scaling:** Use Azure Monitor to track your application's performance and adjust scaling as needed.
- **Security:** Implement security measures such as SSL certificates, multi-factor authentication, and access policies.
###Step 6: Optimization and Maintenance
Once deployed, optimize your application to improve performance and ensure it stays updated with the latest software versions and security patches.
Deploying applications on Azure not only enhances accessibility and scalability through its diverse service options but also streamlines operational efficiencies and enhances security protocols. With this guide, you now possess a robust foundation to harness Azure's cloud capabilities effectively, enabling seamless project expansion and innovation while ensuring optimal performance and reliability across your applications. | paltadash |
|
1,913,348 | Packing Machines: Essential Tools for Product Presentation and Protection | How Packing Machines Can Aid in Packaging The next time you go to a toy shop have you ever wondered... | 0 | 2024-07-06T03:19:19 | https://dev.to/sara_hogana_32eba4596df06/packing-machines-essential-tools-for-product-presentation-and-protection-5734 | design | How Packing Machines Can Aid in Packaging
The next time you go to a toy shop have you ever wondered there so many shapes and sizes of the same but all are packed very sensitively. This packaging (or cover) is essential in protecting the toy from being harm while it has flown away to a new direction. This is where packing machines have a role to play - they not only serve in projecting your products, but also protect them.
Benefits of Packing Machines
There are several benefits of using packing machines. This equipment is built to run at a rate much faster than human hands so that more bottle filler products can be packed in less time. The efficiency, cost saving over many people employed in the same task does not just result packaging being more accurate and consistent than if it was done manually but also makes your product look more professional. Additionally, less pollution and waste can be caused by packaging with an appropriate machine for the task at hand.
Packing Machines innovation
Packing machines have come a long way over the years. Packing machines have changed from their original large and space-wasting shape to a more energy-efficient device that takes up less room. Today, though modern machines provide more than just packaging a product they can add labels fill products with merchandise and even date the product. In algid with the times, these advances accept booty packing machines up a cleft as added capital assets for businesses taht depend on parte.
Safety in Packing Machines
One of the key advantages of packing machines is in ensuring product safety. These are precision packaging machines that make sure products get into the box unscathed during this process. In addition, some machines have the ability to detect any foreign particles inside of your product which minimizes contamination.
The right way to use the packing machine
In order to use packing machines effectively, it is important that the right machine be chosen for a given packaging need. The packaging is done safely, avoiding any unwanted pollution to the food substances and due to this different kinds of packing machines are utilized for various kinds of bottle filling machine products. The machine must also be set up in a manner that allows the creation of market packaged products.
How to Use Packing Machines
The key is that when we are running the packing machine, goods must be well prepared for packaging (i.e., corresponding to required standards of quantity, dimensions and quality). Also, check whether the packing materials are suitable or of not. Then You need to Park the machine properly so that packaging process can start After performing these procedures, run the machine which will take care of the rest of packaging process automatically.
Quality of Packing Machines Service
Proper upkeep of packing machines is particularly important, as performance and productivity are major contributors to a fully functional machine. Machinery that is not serviced regularly will break down more often, which can be expensive in terms of repairs and loss of production. Durable construction: High-quality packing machines are built to last. While premium craft machines may require a heftier upfront cost, they deliver much higher value in the long run.
Packing Machines usedApplication
Simply put, packing machines are used in a variety of industries such as food, pharmaceuticals cosmetics (among others) because they pack products uniformly and effectively. Moreover, these apparatuses are multipurpose and can be utilized for labeling a thing along with filling or sealing it. Are suitable for all types of packaging material such as plastic, glass, metal and paper
Conclusion
Food industry is one of the choicest field in modern business world and generates billions dollars revenue food products at a very significant cost, use advanced scientific researches packaging machinery without which it will not be possible. The provide numerous water bottle packing advantages like faster packing process, accurate packaging results and better safety. Packaging machines are getting smaller and more efficient, multifunctional The next question is the correct setting up and proper maintenance when it comes to packing machines. They are widely used in the fields of various industries, and they can work with different types of packaging materials. Therefore, investing in a good packing machine is one of the best decision you will make for your business that could either break or set it separate from others consecutively secure your products. | sara_hogana_32eba4596df06 |
1,913,347 | Avoid These 4 Common useState Mistakes in React | In the world of React development, useState is a powerful and commonly used hook for managing state... | 0 | 2024-07-06T03:13:59 | https://dev.to/vyan/avoid-these-4-common-usestate-mistakes-in-react-8j5 | webdev, beginners, react, javascript | In the world of React development, `useState` is a powerful and commonly used hook for managing state within functional components. However, its misuse can lead to code that is difficult to maintain and optimize. In this blog, we'll explore four common mistakes developers make when using `useState` and how to avoid them for a cleaner, more efficient codebase.
#### 1. Overusing useState
While `useState` is a powerful tool, overusing it can lead to a cluttered and difficult-to-maintain codebase. Instead of having multiple `useState` calls for related state variables, try to group them into a single state object.
**Avoid This:**
```jsx
const [title, setTitle] = useState("");
const [description, setDescription] = useState("");
const [location, setLocation] = useState("");
```
**Do This:**
```jsx
const [formState, setFormState] = useState({
title: "",
description: "",
location: ""
});
```
By grouping related state variables into a single object, you can simplify state management and reduce the number of `useState` calls.
#### 2. Failing to Optimize Re-renders
When a state variable is updated, React will re-render the component and its children. This can lead to performance issues if not managed properly. Consider using memoization techniques like `React.memo` or `useMemo` to optimize re-renders.
**Avoid This:**
```jsx
function MyComponent({ data }) {
const [count, setCount] = useState(0);
return (
<div>
<p>Count: {count}</p>
<button onClick={() => setCount(count + 1)}>Increment</button>
<ExpensiveComponent data={data} />
</div>
);
}
```
**Do This:**
```jsx
const MemoizedExpensiveComponent = React.memo(ExpensiveComponent);
function MyComponent({ data }) {
const [count, setCount] = useState(0);
return (
<div>
<p>Count: {count}</p>
<button onClick={() => setCount(count + 1)}>Increment</button>
<MemoizedExpensiveComponent data={data} />
</div>
);
}
```
By memoizing `ExpensiveComponent`, you prevent unnecessary re-renders, which improves performance.
#### 3. Ignoring the Initial State
The initial state passed to `useState` is only used on the first render. Subsequent updates will use the new state value. Make sure to provide a meaningful initial state.
**Avoid This:**
```jsx
function MyComponent() {
const [count, setCount] = useState();
// count will be undefined on the first render
return <p>Count: {count}</p>;
}
```
**Do This:**
```jsx
function MyComponent() {
const [count, setCount] = useState(0);
// count will be 0 on the first render
return <p>Count: {count}</p>;
}
```
By providing a meaningful initial state, you ensure that the component renders correctly from the start.
#### 4. Mixing State Management Strategies
Avoid mixing `useState` with other state management libraries like Redux or MobX. This can lead to confusion and make the codebase harder to maintain. Choose a single state management strategy and stick to it.
**Avoid This:**
```jsx
function MyComponent() {
const [count, setCount] = useState(0);
const dispatch = useDispatch();
// Mixing useState and Redux
return (
<div>
<p>Count: {count}</p>
<button onClick={() => setCount(count + 1)}>Increment</button>
<button onClick={() => dispatch(increment())}>Increment (Redux)</button>
</div>
);
}
```
**Do This:**
```jsx
function MyComponent() {
const count = useSelector((state) => state.count);
const dispatch = useDispatch();
// Using only Redux
return (
<div>
<p>Count: {count}</p>
<button onClick={() => dispatch(increment())}>Increment</button>
</div>
);
}
```
By sticking to one state management strategy, you keep your codebase more consistent and easier to understand.
#### Conclusion
Avoiding these common `useState` mistakes can lead to a cleaner, more efficient React codebase. By grouping related state variables, optimizing re-renders, providing meaningful initial states, and sticking to a single state management strategy, you can improve the maintainability and performance of your React applications.
If you found this blog helpful, be sure to save it for later and share it with others! | vyan |
1,913,346 | Deploying a Node.js Application on AWS | Deploying applications to the cloud is essential for modern software development, offering... | 0 | 2024-07-06T03:10:29 | https://dev.to/team3/deploying-a-nodejs-application-on-aws-3338 | Deploying applications to the cloud is essential for modern software development, offering scalability, reliability, and cost-efficiency. AWS (Amazon Web Services) is a leading cloud service provider that offers various deployment options such as Elastic Beanstalk, EC2, and Lambda. This article focuses on deploying a Node.js application using AWS Elastic Beanstalk, highlighting its simplicity and efficiency.
**Why Choose AWS?**
AWS provides several advantages for application deployment:
- Scalability: AWS services can automatically scale to handle increased traffic and workload.
- Reliability: AWS's global infrastructure ensures high availability and fault tolerance.
- Cost-Effectiveness: Pay-as-you-go pricing allows optimized cost management.
- Flexibility: A wide range of services cater to different deployment needs, from fully managed services to more granular control.
**AWS Deployment Options**
**- Elastic Beanstalk**
Elastic Beanstalk simplifies deployment and management by handling the
underlying infrastructure.
**- EC2 (Elastic Compute Cloud)**
Provides scalable virtual servers, offering more control over the
deployment environment.
**- Lambda**
Enables serverless deployment, allowing code execution in response to
events without managing servers.
**Deploying a Node.js Application Using AWS Elastic Beanstalk**
**Prerequisites**
Before you start, ensure you have:
- An AWS account
- AWS Command Line Interface (CLI) installed and configured
- Node.js installed on your local machine
**Step-by-Step Deployment Guide**
**Step 1:** Set Up Your Environment
- **Install AWS CLI:**
Download and install the AWS CLI. Configure it with your AWS credentials:
```
aws configure
```
- **Install Elastic Beanstalk CLI:**
Install the Elastic Beanstalk CLI to interact with the service:
```
pip install awsebcli
```
**- Create a New Directory for Your Project:**
```
mkdir my-aws-app
cd my-aws-app
```
**Step 2:** Initialize Your Application
**- Initialize Elastic Beanstalk:**
Set up a new Elastic Beanstalk application in your project directory:
```
eb init -p node.js my-aws-app
```
**Step 3:** Create Your Node.js Application
**- Create a Simple Express Application:**
Initialize a new Node.js project and install Express.js:
```
npm init -y
npm install express
```
**-Create app.js with the following content:**
```
const express = require('express');
const app = express();
app.get('/', (req, res) => {
res.send('Hello, AWS Elastic Beanstalk!');
});
const port = process.env.PORT || 3000;
app.listen(port, () => {
console.log(`Server running on port ${port}`);
});
```
**- Update package.json:**
Ensure your package.json includes a start script:
```
{
"name": "my-aws-app",
"version": "1.0.0",
"description": "A simple Node.js app on AWS Elastic Beanstalk",
"main": "app.js",
"scripts": {
"start": "node app.js"
},
"dependencies": {
"express": "^4.17.1"
}
}
```
**Step 4:** Deploy Your Application
Create a new environment for your application:
```
eb create my-aws-env
```
**- Deploy Your Application:**
Deploy your application to the created environment:
```
eb deploy
```
**Step 5:** Monitor Your Application
**- Open Your Application in Your Browser:**
After deployment, open your application using:
```
eb open
```
**- Monitor Environment Health:**
Use the Elastic Beanstalk dashboard on the AWS Management Console to monitor your application's health, logs, and metrics.
**Conclusion**
AWS Elastic Beanstalk simplifies the deployment process, allowing developers to focus on building applications rather than managing infrastructure. By following this guide, you can efficiently deploy a Node.js application on AWS and leverage AWS's robust cloud services.
| team3 |
|
1,913,345 | Object.defineProperty() | The Object.defineProperty() method in JavaScript allows you to define or modify a property directly... | 0 | 2024-07-06T03:06:11 | https://dev.to/__khojiakbar__/objectdefineproperty-5g5g | The `Object.defineProperty()` method in JavaScript allows you to define or modify a property directly on an object and control the property's behaviour. It provides fine-grained control over the properties of objects, including whether they are writable, enumerable, or configurable.
Syntax
```
Object.defineProperty(obj, prop, descriptor);
```
- `obj:` The object on which to define the property.
- `prop:` The name of the property to be defined or modified.
- `descriptor:` An object that describes the property being defined or modified.
### Property Descriptors
A property descriptor is an object that can contain the following keys:
- `value`: The value associated with the property (data descriptor).
- `writable`: Boolean indicating if the property value can be changed.
- `configurable`: Boolean indicating if the property can be deleted or changed.
- `enumerable`: Boolean indicating if the property will be listed during enumeration of the properties (like in a for...in loop).
### Examples
**Basic Example**
Let's create an object and define a new property on it using `Object.defineProperty()`.
```
const person = {};
// Define a property 'name' on the person object
Object.defineProperty(person, 'name', {
value: 'Alice',
writable: true,
enumerable: true,
configurable: true
});
console.log(person.name); // Output: Alice
```
**Making a Property Read-Only**
You can use `Object.defineProperty()` to make a property read-only by setting `writable` to `false`.
```
Object.defineProperty(person, 'age', {
value: 30,
writable: false,
enumerable: true,
configurable: true
});
console.log(person.age); // Output: 30
person.age = 25; // This will not change the value of age
console.log(person.age); // Output: 30
```
**Making a Property Non-Enumerable**
You can make a property non-enumerable by setting `enumerable` to `false`.
```
Object.defineProperty(person, 'gender', {
value: 'female',
writable: true,
enumerable: false,
configurable: true
});
console.log(person.gender); // Output: female
for (let key in person) {
console.log(key); // Output: name, age (gender is not listed)
}
```
**Summary**
`Object.defineProperty()` gives you detailed control over the properties of an object. You can control whether a property is writable, enumerable, configurable, and even define custom getters and setters. This makes it a powerful tool for creating complex and well-encapsulated objects in JavaScript.
| __khojiakbar__ |
|
1,913,344 | Deploying a Static Website on AWS EC2 with NGINX | In today’s digital age, having a personal or professional website is almost essential. Whether you’re... | 0 | 2024-07-06T03:02:11 | https://dev.to/ekemini_thompson/deploying-a-static-website-on-aws-ec2-with-nginx-29on | aws, ec2, nginx, webdev | In today’s digital age, having a personal or professional website is almost essential. Whether you’re a budding DevOps engineer, a web developer, or a business owner, knowing how to deploy a website is a crucial skill. This guide will take you through deploying a static website on an AWS EC2 instance using NGINX. By the end of this article, you’ll have your website live and accessible to the world.
### Prerequisites
Before we dive in, make sure you have the following:
- An AWS account
- Basic understanding of AWS EC2, SSH, and NGINX
- Your static website files ready (HTML, CSS, JavaScript)
### Step 1: Launch an EC2 Instance
First, we need to launch an EC2 instance on AWS.
1. **Login to AWS Management Console:**
Navigate to the EC2 dashboard and click on "Launch Instance."
2. **Configure Instance:**
- Choose an Amazon Machine Image (AMI). We will use the Amazon Linux 2 AMI for this guide.
- Select an instance type (t2.micro is suitable for our needs).
- Configure the instance details, and add storage if necessary.
- Add a tag (optional, but recommended for organization).
- Configure the security group to allow SSH (port 22) and HTTP (port 80) traffic.
3. **Launch Instance:**
- Review your settings and launch the instance.
- Download the private key (.pem) file, which you will need to access your instance via SSH.
### Step 2: Connect to Your EC2 Instance
With your instance running, the next step is to connect to it using SSH.
1. **Open a terminal and navigate to the directory containing your private key file:**
```bash
cd path_to_your_pem_file
```
2. **Connect to the instance:**
```bash
ssh -i "MyProfile.pem" ec2-user@your-ec2-public-ip
```
### Step 3: Install NGINX
Now that you're connected to your instance, it's time to install NGINX, the web server that will serve your static website.
1. **Update the package index:**
```bash
sudo yum update -y
```
2. **Install NGINX:**
```bash
sudo amazon-linux-extras install nginx1.12
```
3. **Start and enable NGINX:**
```bash
sudo systemctl start nginx
sudo systemctl enable nginx
```
### Step 4: Transfer Your Static Website Files
Next, you need to transfer your website files to the EC2 instance.
1. **Use SCP (Secure Copy Protocol) to transfer your files:**
```bash
scp -i "MyProfile.pem" -r /path_to_your_website_files/* ec2-user@your-ec2-public-ip:/home/ec2-user
```
2. **Move the files to the NGINX root directory:**
```bash
sudo mv /home/ec2-user/* /usr/share/nginx/html/
```
### Step 5: Configure NGINX
To ensure that NGINX serves your website correctly, we need to adjust its configuration.
1. **Edit the NGINX configuration file:**
```bash
sudo nano /etc/nginx/nginx.conf
```
2. **Update the server block to point to your website files:**
```nginx
server {
listen 80;
server_name your-ec2-public-ip;
location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
}
```
3. **Test the configuration and restart NGINX:**
```bash
sudo nginx -t
sudo systemctl restart nginx
```
### Step 6: Access Your Website
Finally, open your web browser and enter your EC2 instance’s public IP address. Your static website should now be accessible via HTTP on port 80.
### Example Files
Here's a [glimpse](https://github.com/EkeminiThompson/hng.git) of the files used in this deployment:
#### index.html
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Ekemini Thompson - DevOps Engineer</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<header>
<div class="header-content">
<h1>Ekemini Thompson</h1>
<p>DevOps Engineer HNG Intern <a href="https://hng.tech">https://hng.tech</a></p>
<nav>
<a href="#about">About</a>
<a href="#skills">Skills</a>
<a href="#projects">Projects</a>
<a href="#contact">Contact</a>
</nav>
</div>
</header>
<!-- Other sections -->
</body>
</html>
```
#### style.css
```css
body {
font-family: 'Arial', sans-serif;
background-color: #f0f0f0;
color: #333;
margin: 0;
padding: 0;
scroll-behavior: smooth;
}
header {
background-color: #1a1a1a;
padding: 20px;
text-align: center;
color: #fff;
}
nav a {
color: #fff;
text-decoration: none;
font-weight: bold;
}
nav a:hover, nav a.active {
color: #00ADB5;
}
```
### Conclusion
Congratulations! You successfully deployed a static website on an AWS EC2 instance using NGINX. This setup ensures that your website is accessible via a public IP address on port 80, providing a reliable and scalable solution for hosting static content.
For more details or to explore further enhancements, visit the [HNG Internship](https://hng.tech) website or my [github](https://github.com/EkeminiThompson/hng.git)
Deploying your website can seem daunting at first, but it becomes a manageable and rewarding process with the right steps. Happy deploying!
| ekemini_thompson |
1,894,385 | Hi | Say hello | 0 | 2024-06-20T06:18:52 | https://dev.to/bibashjaprel/hi-388h | Say hello | bibashjaprel |
|
1,913,342 | 日本語 ChatGPT 2024: 新しい対話の先へ | 近年、人工知能の発展により、私たちの日常生活はますます便利で魅力的なものになっています。その一環として、OpenAIが開発した最新の日本語 ChatGPT... | 0 | 2024-07-06T03:00:31 | https://dev.to/chatgpt_japanese/ri-ben-yu-chatgpt-2024-xin-siidui-hua-noxian-he-63o | webdev, javascript, beginners | 近年、人工知能の発展により、私たちの日常生活はますます便利で魅力的なものになっています。その一環として、OpenAIが開発した最新の日本語 ChatGPT 2024は、その先駆的な存在として注目されています。このエッセイでは、そのユニークな機能、美しいインターフェイス、そして高速で自然な応答能力に焦点を当てて紹介します。
詳細については、以下を参照してください。: [ChatGPTJapanese](https://chatgptjapanese.net/)
ユニークな機能の充実
日本語 ChatGPT 2024は、多くのユニークな機能を備えています。まず、その多言語対応が挙げられます。これにより、世界中のユーザーが自分の言語で自然な会話を行うことができます。また、AIの理解力が向上し、会話の文脈を理解してより賢く応答します。例えば、複数の質問を一度に処理したり、特定の情報を継続して追跡したりする機能があります。
美しいインターフェイスとアクセシビリティ
日本語 ChatGPT 2024は、使いやすさと美しさを兼ね備えたインターフェイスを提供しています。直感的なデザインにより、誰もが簡単に操作でき、必要な情報に素早くアクセスできます。視覚的に魅力的な要素が取り入れられ、長時間の使用でも疲れにくい設計となっています。
高速で自然な応答能力
このプラットフォームの最も優れた特性の一つは、その超高速で自然な応答能力です。ユーザーの質問や要求に対して、ほとんど遅延なく適切な回答を提供します。これは、AIの処理能力の向上と、高度な自然言語理解技術の結果です。例えば、会話の流れを途切れさせることなく、継続して意味のある対話を展開することができます。
結論
日本語 ChatGPT 2024は、その先進的な技術と使いやすさにより、現代のコミュニケーションに革新をもたらしています。ユーザーはその美しいインターフェイスを通じて、いつでもどこでも賢い会話相手として活用できます。AIの未来は明るく、ChatGPT 2024のような技術がもたらす可能性は無限大です。
接触
会社名：ChatGPT Japanese - ChatGPT 日本語
市区町村：東京都渋谷区
国: 日本
郵便番号：150-0022
電話番号：+81 80-1234-5678
メール：[email protected]
Google Map：東京都渋谷区恵比寿南1-2-3
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1,913,341 | Inner Mongolia Xinda Industrial Co., Ltd.: Driving Innovation in Industry | Develop Aluminum Deep Processing BusinessFirstLine Production | Industry Leader in Inner Mongolia... | 0 | 2024-07-06T02:58:31 | https://dev.to/sara_hogana_32eba4596df06/inner-mongolia-xinda-industrial-co-ltd-driving-innovation-in-industry-3nj | design | Develop Aluminum Deep Processing BusinessFirstLine Production | Industry Leader in Inner Mongolia Xinda Industrial Co., Ltd
Inner Mongolia Xinda Industrial Co., Ltd. is a well-known company which focuses on the production of chemicals used in different industries From multiple years to establish as huge products in terms of quality, amazing innovations and strict safety precautions. Leading the way is Inner Mongolia Xinda Industrial Co., Ltd. in more than one aspect of what we proudly call as industry innovation for which our discussion will be widened in this article.
Advantages
Part of what makes Inner Mongolia Xinda Industrial Co., Ltd. so good at their work is their versatility and creativity, established within the company to tackle any issue that arises during a project or task assigned by management. Spending heavily on Research and Development they consistently Innovated beating others. The specialists at the organization consistently go on to new roads in making better their Silicon Metal products and practical processes which makes them among the leading companies in Industry.
Innovation
Inner Mongolia Xinda Industrial Co., Ltd. relies on innovation They take a forward-thinking stance to enhance their products and methodologies that is supported by an in-house research and development team. Thanks to this proactive attitude, there have been many breakthroughs that enabled the company hold its market position.
Safety
Inner Mongolia Xinda Industrial Co., Ltd. always prefers their employees and customers to be safe from hazards as it is top concerning for them. They have also put in place stringent safety measures to ensure the health and safety of everyone involved. Safety tests are compulsory before launching any product to ensure that the company complies with their pledge of safety. The company also offers training and instructions to help the customer use their product safely.
Use
Inner Mongolia Xinda Industrial Co., Ltd. products span many different industries, providing each customer with the appropriate range of chemicals to satisfy every need. The company serves various sectors including agriculture, pharmaceuticals, textiles and others. Different formats of these chemicals including liquid, powder and crystal is made available for extensibility while it has been designed with usability and efficiency in mind.
How to Use
Inner Mongolia Xinda Industrial Co.,Ltd. products are easy to use The business provides complete ease instructions on the proper and effective use of all products. They also offer training programmes and hold customers being designed to gain the benefits of their Silicon Slag products. The company has a knowledgeable staff who can competently answer any questions customers may have.
Service
Inner Mongolia Xinda Industrial Co., Ltd. is dedicated to customer service and its staff of professionals will help you in any issue that arise This also includes technical support, training sessions and after sales help. With this, the customers are ensured that all of their issues can be solved quickly and efficiently.
Quality
Inner Mongolia Xinda Industrial Co., Ltd. has quality within its DNA They never compromise with the standard of their products and make sure it meets customers 'expectation. They are incredibly strict about quality control and their products reach an amazing level of consistency. The company also increases the quality of its offerings by way of investing in state-of-the art technologies and process enhancements.
Application
The products of Inner Mongolia Xinda Industrial Co., Ltd. are widely used throughout all industries They are used in farming to assist with pollination as well as managing pests. They are also used in dyeing and finishing processes of textile production. In addition, the pharmaceutical sector is used in medicine production. The organization still maintains its commitment to designing new and improved Calcium Silicon products for an array of different applications.
Conclusion
Inner Mongolia xinda Industrial Ltd is among the leading forces in chemical industry by following innovation and efficiently meeting customer requirements. In this fiercely competitive market, their quality and safety services alongside exceptional customer service continue to be the key ingredients that solidify a place in the world of cargo-transport. Inner Mongolia Xinda Industrial Co. Ltd: This is a perfect source for businesses that demand premium-grade products | sara_hogana_32eba4596df06 |
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1,913,339 | Timing Functions in JS? | All the following functions(setTimeout, clearTimeout, setInterval, clearInterval) are part of... | 0 | 2024-07-06T02:42:37 | https://dev.to/__khojiakbar__/timing-functions-in-js-3362 | functions, settimeout, setinterval, javascript | All the following functions(setTimeout, clearTimeout, setInterval, clearInterval) are part of JavaScript's timing functions. These functions are used to schedule the execution of code at specific times or intervals.
### Summary of Timing Functions
1. `setTimeout`: Schedules a one-time execution of a function after a specified delay.
2. `clearTimeout`: Cancels a `setTimeout` if it hasn't already executed.
3. `setInterval`: Schedules repeated execution of a function at specified intervals.
4. `clearInterval`: Cancels a `setInterval` to stop the repeated execution.
### Usage Example Combining All Timing Functions
Here's a combined example using all these timing functions in a single script:
```
// Schedule a one-time function with setTimeout
let snackTimeout = setTimeout(() => {
console.log("Time for a snack!");
}, 5000);
// Schedule a repeated function with setInterval
let reminderInterval = setInterval(() => {
console.log("Don't forget to drink water!");
}, 2000);
// Cancel the snack timeout before it executes
clearTimeout(snackTimeout);
// Cancel the reminder interval after 10 seconds
setTimeout(() => {
clearInterval(reminderInterval);
console.log("Stopping the water reminders.");
}, 10000);
```
### How They Work Together
1. `setTimeout` schedules a message to be printed after 5 seconds but is canceled with `clearTimeout` before it can execute.
2. `setInterval` schedules a message to be printed every 2 seconds.
3. After 10 seconds, `clearInterval` stops the repeated messages from `setInterval`.
### Word to Call All These Functions
You can refer to these functions collectively as `timing functions` or `timer functions` in JavaScript. They are essential tools for managing time-based events in web development.
| __khojiakbar__ |
1,913,338 | Understanding Go's Garbage Collector: A Detailed Guide | Garbage collection is a form of automatic memory management. In programming languages like Go (also... | 0 | 2024-07-06T02:42:26 | https://dev.to/siashish/understanding-gos-garbage-collector-a-detailed-guide-kj4 | go, garbagecollection, memorymanagement, programmingtips |
Garbage collection is a form of automatic memory management. In programming languages like Go (also known as Golang), garbage collection plays a crucial role in managing the allocation and deallocation of memory to ensure efficient performance and avoid memory leaks. Go's garbage collector (GC) has evolved significantly since the language's inception, becoming more sophisticated and efficient. This blog will delve into the details of Go's garbage collector, its mechanisms, and how it impacts your Go applications.
### What is Garbage Collection?
Garbage collection is the process of automatically reclaiming memory that is no longer in use by the program. It helps prevent memory leaks, which occur when memory that is no longer needed is not released back to the system, leading to inefficient memory use and potential program crashes.
### The Evolution of Go's Garbage Collector
Go's garbage collector has gone through several iterations, improving with each new version of the language. The key milestones include:
1. **Go 1.0 (2012)**: The initial GC was a stop-the-world mark-and-sweep collector. This approach halted the program execution to identify and reclaim unused memory, leading to noticeable pauses in program execution.
2. **Go 1.3 (2014)**: Incremental improvements were made, but the stop-the-world pauses remained a significant issue.
3. **Go 1.5 (2015)**: Introduction of a concurrent mark-and-sweep garbage collector, significantly reducing stop-the-world pauses by performing much of the work concurrently with the program execution.
4. **Go 1.8 (2017) and beyond**: Continued enhancements to reduce latency and improve performance, including optimizations in garbage collection algorithms and better tuning for various workloads.
### How Does Go's Garbage Collector Work?
Go's garbage collector is a hybrid of the mark-and-sweep and concurrent garbage collection techniques. Here’s a closer look at its main phases:
1. **Mark Phase**: This phase identifies which objects are still in use and which are not. It starts with a set of root objects, such as global variables and stack variables, and traverses the object graph to mark all reachable objects. The mark phase is performed concurrently with the program execution to minimize stop-the-world pauses.
2. **Sweep Phase**: In this phase, the GC reclaims memory from objects that were not marked as reachable. This phase is divided into smaller tasks to minimize impact on program execution and is also performed concurrently.
### Key Features of Go's Garbage Collector
1. **Concurrent Mark-and-Sweep**: The GC performs much of its work concurrently with the application, reducing the pause times that can disrupt the program’s performance.
2. **Write Barrier**: To maintain consistency during the concurrent mark phase, Go uses a write barrier. This mechanism ensures that any changes to object references are tracked and correctly handled.
3. **Generational Collection**: While Go does not implement a full generational garbage collection like some other languages (e.g., Java), it does optimize for objects with different lifetimes by segregating short-lived objects from long-lived ones.
4. **Stack Scanning**: Go’s GC is capable of efficiently scanning goroutine stacks, which can grow and shrink dynamically. This feature helps in accurately identifying live objects and managing memory more efficiently.
### Tuning the Garbage Collector
Go provides several ways to tune the GC to better suit your application's needs:
1. **GOGC Environment Variable**: The `GOGC` variable controls the garbage collection frequency. It sets the percentage of heap growth at which the garbage collector will trigger a collection. For example, setting `GOGC=100` means the GC will run when the heap size doubles.
2. **Explicit Garbage Collection**: Developers can manually trigger garbage collection using the `runtime.GC()` function. This can be useful in scenarios where you know a large amount of memory can be reclaimed at a specific point in your program.
3. **Heap Profiling**: Go's runtime package provides tools for heap profiling (`runtime/pprof`). These tools can help identify memory usage patterns and optimize code to reduce memory consumption.
### Best Practices for Efficient Garbage Collection in Go
1. **Minimize Allocation**: Reduce the frequency and size of memory allocations. Reuse objects where possible to reduce the pressure on the garbage collector.
2. **Profile Memory Usage**: Use Go’s profiling tools to understand memory usage patterns and optimize your code accordingly.
3. **Tune GC Parameters**: Adjust the `GOGC` parameter based on your application's workload. For memory-intensive applications, a lower value can reduce memory usage, while a higher value can improve performance by reducing GC frequency.
4. **Avoid Large Heap Sizes**: Large heaps can increase GC pause times. Aim to keep the heap size within reasonable limits to maintain optimal performance.
### Conclusion
Go's garbage collector is a powerful tool that helps developers manage memory efficiently and avoid common pitfalls like memory leaks. Understanding its workings and knowing how to tune it can lead to significant performance improvements in your Go applications. As Go continues to evolve, so too will its garbage collector, making it an even more robust and efficient feature of the language.
By following best practices and leveraging the tuning options provided by Go, you can ensure that your applications run smoothly and efficiently, even under heavy memory loads.
Happy coding!
---
Feel free to reach out with any questions or comments about Go's garbage collector or any other Go-related topics!
Originally published at [https://ashishsingh.in/understanding-gos-garbage-collector-a-detailed-guide/](https://ashishsingh.in.) | siashish |
1,913,337 | Budget Resort in Ranthambore | If you are looking for budget resort in ranthambore so you are in right place green safari and tours... | 0 | 2024-07-06T02:38:27 | https://dev.to/satish_jain_058742f2630cb/budget-resort-in-ranthambore-5d19 | If you are looking for **[budget resort in ranthambore ](https://ranthamboresafari.co.in/budget-resort-in-ranthambore.html)**so you are in right place green safari and tours provide budget resort ranthambore very reasonable price with excellent services we have 25 room in ranthambore. Budget resort in Ranthambore is the "Green Safari and Tours." While the prices can vary depending on the season and availability, it generally offers budget-friendly accommodation options without compromising on comfort and services.
**[Resort in Ranthambore](https://ranthamboresafari.co.in/budget-resort-in-ranthambore.html)**
No matter what kind of traveler you are—a newlywed couple, a bunch of friends, a family with young children, or even senior citizens—Green Safari and Tours in Ranthambore is the ideal place to spend your ideal vacation. We provide wheelchair accessibility for older persons and a number of concessions for children under five.
Because we feel that our guests' satisfaction is our resort's main objective, we offer all the essential amenities as well as optional features upon request for their comfort. Situated on a 5-acre plot of land, our accommodations provide ten roomy deluxe rooms, fifteen opulent tents, a restaurant, and a swimming pool. We are prepared to offer comfort on all fronts, including complimentary toiletries, hot and cold running water in the bathroom, and a round-the-clock power backup.
Being established in 2010, we have mastered our services, and have wellmannered staff with hospitality practice at your service.
Best Resort in Ranthambore
Imagine waking up to the melodies of birdsong and a glorious sunrise greeting you from comfortable mattresses. You're going to have a life-altering experience with Green Safari and Tours, far away from the chaos of contemporary city noises. With the enormous fortress that gives the reserve its name rising gloriously at its center, it is the ideal starting place for exploring the pristine grandeur of Ranthambore, a forest that is said to be billions of years old. This top resort in Ranthambore, which is dotted across the park with relics of palaces, cenotaphs, and follies, is ready to take you on a breathtaking wildlife escapade. Six kilometers from Ranthambore National Park, Green Safari and Tours exudes a sense of pastoral beauty and an abundance of amazing surprises.
Situated in the natural setting, the resort exudes old-world grandeur and includes amenities such as lovely accommodations, a swimming pool, and even a spacious lawn and garden area.
The wild has its traditions and attractions. Since you are an explorer rather than a tourist, meals serve as social events when explorers can exchange tales of their adventures. We have a restaurant that serves food at set times because of this.
Luxury Resort Ranthambore
A lovely morning, a lyrical sunset and all the time in the world to turn off the world and listen to the sounds of tranquility is just a substitute to Green Safari and Tours, Ranthambore.
The ultimate expression of unique culture and heritage combined with perpetuity may be found in this luxury resort in Ranthambore. We invite you to discover the splendor of nature within the opulent, verdant surroundings. There's no denying that sleeping in a tent and enjoying the breathtaking jungle vistas will be enjoyable. Deluxe Rooms and Luxury Tents are two options for spiritual stays at Green Safari and Tours, one of the opulent resorts in Ranthambore. Whether you want to feel like a royal Rajput or like you're on a dream vacation with ultra-modern amenities! Everything is right here!
Green Safari and Tours shares the quintessence and warm atmosphere of a group known for its hospitality. So just leave all your stress at your home and enjoy your life to its fullest by connecting with nature paradise!
Feel Free & Safe
Our dependable hospitality team and round-the-clock CCTV security ensure that you may enjoy your trip without any hassles. We adhere closely to COVID-19 guidelines to protect both employees and guests. Every surface is cleaned and disinfected on a regular basis, including the beds. A negative RT-PCR test is required for foreign tourists in order to be accommodated at our resort. Thermal screening and mask wear are monitored at the resort's entrance.
So just do as instructed and relish every moment of your ideal vacation.
Accommodation
Ranthambore Ac Tents
The accommodations in Deluxe Luxury Tents have a king-size double bed, two sets of Aram chairs, a luggage rack, and complete air conditioning. Every tent has an attached bathroom with a hand shower and a hot and cold shower. Other conveniences like a study table or two side tables with two lamps are also available in the tents. There is also daily housekeeping offered.
Dimensions of the tent are as following:
* Tent size – 16 x 30
* Bed Room Size – 16 x 16
* Seating Area – 16 x 10
* Washroom size – 17 x 10
Ranthambore Air Cooler Tent
Standard Tents offers incredibly roomy, fully furnished accommodations with all the amenities. Additionally, there is a seating area outside where people may unwind and enjoy some quiet, alone time. Every tent has an attached bathroom, a king-size double bed, a baggage rack, and complete air conditioning. Every tent has additional features that are comparable to those found in luxury tents.
Dimensions of the tent are as following:
* Tent size – 16 x 30
* Bed Room Size – 16 x 16
* Seating Area – 16 x 10
* Washroom size – 17 x 10
Ranthambore Deluxe Room
Our classic Deluxe single- or twin-bedded rooms welcome you to enjoy your dream holidays peacefully with innumerable basic facilities as well as special facilities on demand. These rooms are of 18’ x 40 sizes to make you stay lavishly in these spacious rooms! You will undoubtedly feel nostalgic after a few years about this lovely experience of living amidst the lush green areas of Ranthambore.
Our well-trained staff is eager to serve you better and even attends to your needs on call. Daily housekeeping and laundry services are surely going to impress you regarding our attention to hygiene and regular maintenance. The elegant bathroom is accompanied by hot-cold water throughout the day, along with all the toiletries you need.
Get assured to get housekeeping, a water bottle, a mini bar, a TV, hot-cold water, an electric kettle, a doctor on call, emergency services, and CCTV surveillance in public areas for sure.
Other resort facilities include laundry services, a dining hall, a daily fresh menu, a spacious lawn and garden area, a swimming pool, a front desk, ayurvedic massages on-demand, free wifi at the reception area, indoor and outdoor games, and travel assistance.
Ranthambore AC Swiss Tent
Evanescent beauty lies all around you! Life in this serene aura is magnificently elemental and wonderfully silent, with stunning sunrises, fascinating sunsets, and a gorgeous night sky—just like the paradox that is India. An array of luxurious tents at green safari and tours showcases the royal legacy of Rajput kings who used to stay at such tents during their travel expeditions.
Spend your dream holidays like Royal Rajputana families! The eye-catching sight of sheer silk curtains along with illuminating table lamps is surely a showstopper at our resort. Unique marble lamps offer a choice of bright or romantic illumination to suit your mood. Provided with air conditioning, the tents have single or twin beds with a tent size of 15’ x 30’. Electric kettles are also provided aside from your bed tables for your convenience.
The sit-out offers a stylish atmosphere with classic furnishings that is complemented by the warm welcome of your concierge and retinue. The unrivaled and unobstructed views of the lush green area are a bonus. All of the furnishings are carved from hardwood and carry the mark of a bygone era when monarchs employed lavish tents on hunting journeys. Get assured to get housekeeping, laundry services, a water bottle, hot-cold water, an electric kettle, a doctor on call, emergency services, and CCTV surveillance in public areas for sure.
Other resort facilities include a dining hall, a daily fresh menu, a spacious lawn and garden area, a swimming pool, a front desk, ayurvedic massages on-demand, free wifi at the reception area, indoor and outdoor games, and travel assistance.
Ranthambore Experiences
* Wildlife Safari Ranthambore
* Ranthambore Fort
* Ranthambore Ganesh Temple
* Ranthambore Gharial Sanctuary
* Ranthambore Museum of Natural History
* Ranthambore Local Art and Craft
Top 7 Resort in Ranthambore
Ranthambore is renowned for its national park, which is a popular destination for wildlife enthusiasts and tourists seeking to catch a glimpse of the majestic Bengal tigers. There are several resorts in Ranthambore that cater to various budgets and preferences. Here are a few notable ones:
The Bagh Garh
The Bagh Garh is an exclusive luxury resort located on the outskirts of Ranthambore National Park. It offers luxurious tented accommodations, each with its own private courtyard and outdoor seating area. The resort provides personalized service, gourmet dining options, spa treatments, and guided wildlife safaris in the national park.The Bagh Garh is known for its serene ambiance and top-notch amenities, making it a preferred choice for discerning travelers seeking an opulent retreat amidst the wilderness of Ranthambore.
Vivanta Sawai Madhopur Lodge
This luxurious resort is set amidst 12 acres of lush green gardens and offers a blend of traditional Rajasthani architecture with modern amenities. It provides comfortable accommodation options, dining facilities, a swimming pool, and spa services.
The Oberoi Vanyavilas
This is one of the most luxurious resorts in Ranthambore, offering luxurious tents with private gardens, an outdoor pool, spa services, and dining options that serve both Indian and international cuisine.
Sher Bagh
Sher Bagh offers a unique experience with its luxury tents that provide a blend of traditional Rajasthani design and modern comforts. The resort also organizes wildlife safaris and other activities for guests to explore the beauty of Ranthambore.
Taj Ranthambore Resort & Spa:
This resort is part of the renowned Taj Hotels chain and offers luxurious accommodation, dining options, a spa, and various recreational facilities. It provides a tranquil retreat amidst the natural beauty of Ranthambore.
Nahargarh Ranthambhore
This resort offers a serene ambiance amidst the Aravalli hills, with comfortable accommodation options, dining facilities, a swimming pool, and spa services. It's an ideal choice for both leisure and wildlife enthusiasts.
Tiger Den
Tiger Den Resort is nestled in the Aravalli hills of Ranthambhore National Park. Tiger Den Resort a 04 star resort in ranthambore boasts of quality accommodation and services. The resort is barely five minutes away from the main entrance of the park. There are 38 Deluxe Cottage Rooms and 12 luxury suites. Each room is equipped with modern amenities. Well-planned landscaping adds to the rustic ambiance adding to the natural beauty.
| satish_jain_058742f2630cb |
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1,913,336 | Henan Jinbailai Industrial Co., Ltd.: Your Source for Premium Steel Plates | Henan Jinbailai Industrial Co., Ltd. - Your Reliable Steel Plates Supplier Do you need a source of... | 0 | 2024-07-06T02:38:04 | https://dev.to/alice_brooksj_60e9c11dfec/henan-jinbailai-industrial-co-ltd-your-source-for-premium-steel-plates-16nh | design | Henan Jinbailai Industrial Co., Ltd. - Your Reliable Steel Plates Supplier
Do you need a source of high-quality steel plates to help your construction projects? Search no further than Henan Jinbailai Industrial Co. Ltd.! A leading manufacturer and supplier of steel plates, we also offer a range of sizes for all the production-run requirements. We are the best choice whether you need steel fiber for bridge construction, on your building projects, in machinery or shipbuilding.
Features of Henan Jinbailai Industrial Co., Ltd:
Among all the steel plate manufacturers, Henan Jinbailai Industrial Co. Ltd. is a clear winner when it comes to providing high quality plates of excellent anti-wear properties. We use only top-grade raw materials when building our plates, therefore you can rest assured your GoliathTech helical pile or screw piles will last a lifetime. We have experienced professionals using creative ways in the manufacturing process to produce quality stainless steel pipe products. Furthermore, not just safe but also environmentally compliant with all safety standards circulating across the world (or universe).
Innovation & a Porpoise for Excellence:
Innovation is at the heart of all our operations, here at Henan Jinbailai Industrial Co. Ltd. By keeping an eye on emerging industry trends, and continuing to invest in state-of-the-art technologies - we stand by our commitment to bring you the best products possible. Our expert team continues to innovate new solutions that cater to the changing needs of our clients, always leading us on top.
Prioritizing Safety:
At Henan Jinbailai Industrial Co. Ltd safety is number-one in everything that we do, Safety is at the core of our production from raw materials to delivered product. Our plastic plates are subject to a thorough testing process, maintaining strict quality standards that give you peace of mind when using our products.
How to Use Our Steel Plates:
Our steel plates are user-friendly and can be tailored to your specifications. Our team of professionals is waiting to help you choose the perfect plate, whether they need to be cut in a specific size, shape or thickness. We also give some useful tips how to use and keep a selected steel plate in shape.
Exceptional Customer Service:
At Henan Jinbailai Industrial Co. Ltd., providing unparalleled customer service is at the heart of what we do. The team here is all very experienced and are ready to answer any queries you have or offer advice on the best stainless steel tubing product for your requirements Our services are all over the place, from designing to packaging and delivering without a delay so that our customers can always have a smooth purchase with us.
Dedication to Quality Control
Henan Jinbailai Industrial Co Ltd, we do not negotiate about Quality. The steel plates are produced by our highest quality raw materials and have gone through a rigorous control check at every stage of production. We use our internal quality control team to ensure all of our products are within those standards, with a strong after service warranty that we stand behind.
Versatile Applications:
Our steel plates are versatile and can be used for bridge construction, building projects, machinery applications; shipbuilding as well in the automotive aerospace industries. Our plates are customized to your application needs, providing flexibility and dependability for many projects.
In Conclusion:
Henan Jinbailai Savage Mountain Steel Plate Protection Gang - For the ultimate in security, quality and service are your top steel plates; At Welford Engineering you will find a complete line of stain steel pipe products for all your construction requirements. Your steel plate needs are backed by our durable, eco-friendly steel plates and unbeatable customer service! | alice_brooksj_60e9c11dfec |
1,913,332 | Canter Safari in Ranthambore | Ranthambore National Park is one of the best places to explore different kinds of wildlife during a... | 0 | 2024-07-06T02:28:42 | https://dev.to/satish_jain_058742f2630cb/canter-safari-in-ranthambore-1pfd | **[Ranthambore National Park](https://ranthamboresafari.co.in/canter-safari-in-ranthambore.html)** is one of the best places to explore different kinds of wildlife during a tiger safari. Jungle Safari is a major attraction and one of the most popular options to spot animal movement and admire the beautiful landscape in Ranthambhore Tiger Reserve. Green Safari and Tours Ranthambore offers the visitor a chance to explore a variety of animals residing in the park. There are two safaris a day from October to June, one starting in the morning and the other late in the afternoon. The tour lasts 3 to 12 hours and is conducted by jeep (open-top roof gypsy) or canter (open-top roof bus). You will visit the park in a 20-seat open canter (top-roof bus) or a 6-seat open top roof jeep, both of which we have re-fitted and furnished for comfort and good viewing. Our trackers are from families who have known the jungle and its animals for generations.
It is a 20-seater open bus that operates in some of the safari zones in Ranthambore. Canter Safari is a thrilling safari method for seeing animals in Ranthambore National Park. A Canter safari is undoubtedly one of the best ways to explore the rich wildlife of Ranthambore National Park. Canter is best for a large group of visitors who, instead of booking 1-3 jeeps, can choose this option.
It offers a unique wildlife experience to explore the park and enjoy the breathtaking vistas of the national park. Canter Safari is available in Ranthambore at two times: in the morning and in the afternoon.
The seating height of a Jeep is lower than a canter. Hence, it is a better vehicle to take photographs of wildlife, and it offers a better angle too. During a safari, a Jeep is easier to manoeuvre than a Canter.
**[Canter](https://ranthamboresafari.co.in/canter-safari-in-ranthambore.html)** is an excellent safari alternative for individuals who like to enjoy the safari experience with others rather than riding in separate cars. The canter safari in Ranthambore guarantees that every member of the family or group has the same experience. If a group of people goes on safari in various cars, some of them may be lucky enough to spot tigers while others are not.
A canter safari is undoubtedly one of the best ways to explore the rich wildlife of Ranthambore National Park.
Canter Safari in Ranthambore Start Time:
Morning Safari: 06:30 am hrs
Evening Safari: 03:00 pm hrs
Exit Time of Safari :
Morning Safari: 09:30 am hrs
Evening Safari: 06:30 pmhrs
Note: During the weekends, holidays, and vacation season (from October to April), the park gets a high rush of visitors for the safari. As a result, it is best to reserve your safari seat in Ranthambore well in advance before visiting the park.
Safari Tips: Ranthambore
* The safari tourism zones 1–5 are very popular among tourists and considered the "core" of the park. It is only because of the high chances of wildlife sightings.
* Safari zones of Ranthambore National Park are closed from July to September during the monsoon season.
* The winter season, from October to February, is the most suitable time to visit the park.
There are 10 different safari zones for tourists inside Ranthambhore.
Zone 1: Singhdwar Raipur, Amreshwar Dang, Tuti ka Nalla, Sultanpur, Gada Dub, Peela Pani, exit from Singhdwar
Zone 2: Jogi Mahal, Jhalra, Kamaldhar, Amrai Phoota Bandha, Pandudeh, Guda, Gandharia, Polkya, exit from Jogi Mahal
Zone 3: Jogi Mahal, Padam Talab, Raj Bagh, Mandook, High Point, exit from Jogi Mahal
Zone 4: Singhdwar, Tamakhan, Malik Talab, Lakarda, Berda, Semli, Adidaant, Lambi, exit from Singhdwar
Zone 5: Singhdwar, Jokha, Kachida, Dhakda, Baghda, Bakola, Anatpura, exit from Singhdwar
Zone 6: (Kundal): Rajbagh Naka, Palli Darwaza, Kundal Area, Patwa Baori, Sonkach, Kala Pani, exit from Rajbagh Naka
Zone 7: (Chidikho): Rajbagh Naka, Chidikho, Jamoda, Kushalipura, exit from Rajbagh Naka
Zone 8: (Balas): Balas, Neemli Dang, Kali Bhat, Kherai, Mahakho, exit from Balas
Zone 9: ( Kuwalji) Approx 45 kms
Zone 10: Kushalipura , Bodal , Halonda ,Banskhori , Aantri , exit from Devpura
Ranthambhore Animals:
Tigers, Leopards, Striped Hyenas, Sambar deer, Chital, Nilgai, Common or Hanuman langurs, Macaques, Jackals, Jungle cats, Caracals, Sloth bears, Black Bucks, Rufous-tailed Hare, Chinkara, Common Palm Civets or Toddy Cats, Common Yellow Bats, Desert Cats, Fivestriped Palm Squirrels, Indian Fal The amphibian species only consist of the common India toad and the common frog. | satish_jain_058742f2630cb |
|
1,913,328 | Roped In: Understanding the Importance of Quality Rope | Quality Rope Is Key If you are going out on an outdoor adventure, Deep into a construction project... | 0 | 2024-07-06T02:24:48 | https://dev.to/alice_brooksj_60e9c11dfec/roped-in-understanding-the-importance-of-quality-rope-2bj6 | design | Quality Rope Is Key
If you are going out on an outdoor adventure, Deep into a construction project or in any industrial set up a good rope matters. Ropes, they're really useful tools to help you tie things up and even heavy objects
When preparing for a camping trip, constructing something or assisting in work on site one thing you must be equipped with is strong rope. The proper rope can save your life, help things to last longer and allow you get the job done quicker.
Good Rope, Great Adventures Outdoors
Be it hiking, camping or rafting; outdoor activities can be safe and fun when you have the right rope in your trip. One must not forget: sturdy mooring anchor rope are indispensable...Such that a tent stands everybody does!
You want a sturdy, non too heavy rope that can hold the weight of your own body. Furthermore, it needs to remain well built enough even after a lot of use and operate in different weatherthetimes.
Critical Use of Rope in Constructing
Quality strong ropes are really important when it comes to construction work so that workers could get their job done safely and projects can move efficiently. Ropes are also required to lift heavy weights as well keep the equipment tight, of selecting a right kind of ship mooring rope plays huge role in functioning construction site properly.
For the safety and efficiency of construction, ropes robust enough to bear heavy loads everyday wear-and-tear as well different season are required.
Varieties in Quality Rope Out There
The list does not stop here, there is a huge need for ropes in other businesses and industries like leisure (climbing), construction (crane operation) etc. Ropes are used in fishing, boating and vast industries like oil, shipping, mining.
You need a good quality rope for everyday tasks like crafting, gardening or diy projects. Everyday items like dog leashes should have good rope to last and preform effectively.
Using Ropes to Save Yourself from Risks
Working with low-quality and inexpensive a pair of Ropes in industrial utility will cause serious damage or maybe death. This rope is less predestined to break but may still give way so that accidents happen, people get hurt and tools are destroyed which means expensive downtime an work time.
It is important to make sure things last, so it should be clear that investing a bit in good ropes are right for the job. Find Ropes of Strength, Minimum Stretch and High Weight Rating You will always need the best way to choose from trusted brands with reliable safety and durability warranties for any mooring rope. Care of New RopesStoring your new ropes correctly and looking after them well will prevent damage and help prolong their life.
| alice_brooksj_60e9c11dfec |
1,913,323 | Revolutionizing Supply Chain Management with Metaverse | Have you ever wondered if the product that you pick from the market with so much ease or order from... | 27,673 | 2024-07-06T02:14:47 | https://dev.to/rapidinnovation/revolutionizing-supply-chain-management-with-metaverse-515c | Have you ever wondered if the product that you pick from the market with so
much ease or order from the comfort of your home goes through a lot of stages?
Whether it’s a phone in your pocket or a shirt on your back, logistics and
transportation play a crucial role in getting it to you. But, behind the
scenes, an even bigger force is at work: supply chain management.
Supply chain management ensures raw materials flow smoothly to the
manufacturers, finished products reach stores on time, and you get what you
need when you need it. However, traditional supply chains can suffer from
inefficiencies, leading to wasted time and money. That’s when the power of
digitization helps you win the battle against supply chain disruptions.
Metaverse supply chain management is your saviour! It’s not just a futuristic
dream, but it is already making waves across industries.
## What is Metaverse?
Metaverse is a term that allows users to experience a virtual environment. It
provides a space where individuals can engage with both digital objects and
environments, as well as with other users, in real-time interactions. This
leads to a more efficient, cost-effective, and sustainable supply chain
system.
## How is Metaverse Revolutionising Supply Chain Management?
### 1\. Increased Efficiency
Metaverse technology enables real-time connections between businesses and
stakeholders, reducing the need for lengthy and time-consuming processes. This
leads to faster delivery times and improved satisfaction.
### 2\. Cost-Effective
Metaverse in supply chain management offers amazing cost-saving opportunities.
Companies can significantly reduce operating costs through streamlined
workflows and reduced reliance on physical logistics.
### 3\. Improved Collaboration
Metaverse promotes improved collaboration through virtual platforms where
stakeholders connect effortlessly. This enhanced collaboration optimizes
supply chain efficiency and drives better marketplace outcomes.
### 4\. Error-Free Data
Emerging technologies like artificial intelligence and the metaverse promise a
future of "perfect data" for supply chains. This translates to pinpoint
accuracy, increased resilience against disruptions, and significant cost
savings.
### 5\. Increased Transparency
The Metaverse acts as an X-ray for your supply chain network. Real-time
connections let stakeholders track products and shipments, constantly
verifying information. This transparency promotes trust and strengthens
relationships across the entire network.
### 6\. Brings Innovation
The metaverse provides a perfect platform for innovation in the supply chain
industry. This new-age technology can connect businesses and stakeholders in
innovative ways, promoting industry advancement and fostering competitiveness.
### 7\. Sustainability
With metaverse technology, companies can minimize their reliance on physical
transportation, effectively reducing carbon emissions. This approach enhances
customer and stakeholder engagement, catalysing the development of eco-
conscious products and services.
So, what’s next? Are you ready to discover the advantages of the metaverse in
global supply chain management? Metaverse technology marks a pivotal shift
towards more efficient, cost-effective, and sustainable supply chain
management practices. Through virtual innovation, businesses can optimize
operations, foster collaboration, and mitigate environmental harm. This
transformative approach not only tackles present-day challenges but also lays
the foundation for a resilient and eco-conscious supply chain ecosystem,
promising a brighter and greener future for generations to come.
📣📣Drive innovation with intelligent AI and secure blockchain technology! Check
out how we can help your business grow!
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development/blockchain-app-development-company-in-usa)
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development-company-in-usa)
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development-company-in-usa)
## URLs
* <http://www.rapidinnovation.io/post/how-metaverse-is-transforming-supply-chain-management>
## Hashtags
#SupplyChainManagement
#MetaverseTechnology
#LogisticsInnovation
#SustainableSupplyChain
#DigitalTransformation
| rapidinnovation |
|
1,913,322 | Innovative Acrylic Aquarium Features | However, acrylic aquariums have arguably gained the best of reputation among brand new and veteran... | 0 | 2024-07-06T02:10:17 | https://dev.to/alice_brooksj_60e9c11dfec/innovative-acrylic-aquarium-features-1fok | design | However, acrylic aquariums have arguably gained the best of reputation among brand new and veteran fish keepers. They are also more scratch-resistant and have a wider range of sizes available making them popular due to their flexibility. However, the benefits of acrylic aquariums extend far beyond being made exclusively from them as a material. New design elements bring a flair for creativity and visual appeal to these marine exhibits.
This is via the creation of various shapes and angles to acrylic aquariums, which are one hell lot eye-catching in terms of design! Previously, traditional tanks were rectangular but manufacturers now provide some with curved edges or are designed in hexagonal shapes. These unique style acrylic aquarium tank not only increase the aesthetic look of any area however they likewise serve as an environment for fish that are very much like bent forms from nature in oceans.
A third interesting design feature is the use of some plant life in addition to an aquarium. Instead of just burying plants in the aquarium and using them to decorate it, technologists now build these planters or pockets into dimensions becoming part of tanks seamlessly. This incorporation not only aids in having more of a natural feel to the environment but it also benefits both plant and for fish species being housed inside.
The Evolution of the Acrylic Aquarium
Acrylic aquarium technology has come a long way since its first inception and advancement over the years offers an appearance with improvements in safety, ease of use and attention to healthier conditions for aquatic life.
Self-Cleaning Acrylic AquariumsRecent advancements in acrylic aquarium technology have introduced self-cleaning tanks. They also come equipped with their own built in filtration system which helps to flush out debris and helps keep your aquarium tank acrylic clean longer, thereby lessening the human maintenance needed to do so. Beyond that, many of these tanks come with an alert system to keep owners posted when the filtering mechanism goes awry.
Although we are accustomed to higher, in this dive the external visibility was even beyond that ( another way, it stayed on next level) One running trend incorporates energy efficient solutions for aquariums. LED lighting has become a preferred option because of its benefits in terms of energy saving and fish-appropriate illumination. Others are also fitted with low-power consumption pumps and heaters to keep your tanks functioning well while using less power.
The Innovative Characteristics to Create the Most Amazing Acrylic Aquariums
Some of those cutting-edge features are really good looking in acrylic aquariums, but do not just stop there since they become very functional too. Though these features are not necessary, they go a long way to making the fishtank more visually appealing and engaging for both you and any spectators.
One of the additional feature that could be cutomised is an exterior with some graphics and images Custom printed high-quality designs from family photos to a personal hobby are realized on the surface of sewing tanks. It's all in the personal touch and has that little NTouch of uniqueness to any aquarium.
The other cool feature is the ability to connect via Bluetooth. A handful of modern acrylic aquariums feature built-in Bluetooth speakers that can play sound directly into the tank. It provides a level of enjoyment, and relaxation to the aquatic experience-whilst creating that tranquil atmosphere for humans as well fish.
Improve Your Water World with Awesome Acrylic Aquarium Structures
If you are an experienced aquarist, as well as someone just starting to develop interest in aquarium fish keeping at home (if that is how You picked up), acrylic tanks-spheres - there environmental design and suggest Why this type of glass ornaments. Acrylic aquariums provide benefits over glass, including design features (built in planters and special shapes) as well as technology advancements related to filtration systems along with energy saving lighting going a long way to create stunning aquascapes.
Creative features such as coffee table aquariums and waterfall fish tanks help to enhance the experience of keeping an aquarium, relaying a truly unapparelled view into any space that is brought alive by this living spectacle. Both solid as well as standout, acrylic aquarium come in various shapes and sizes to appeal all tastes. These stunning acrylic aquarium options will help in giving your fish pals a more specific and customized underwater home than ever before. | alice_brooksj_60e9c11dfec |
1,913,142 | SQL with Vector Search : MyScale, Spring and Java - Step by Step tutorial! | In today's data-driven world, the ability to perform efficient and powerful searches is crucial for... | 0 | 2024-07-06T01:50:16 | https://dev.to/vishalmysore/sql-with-vector-search-myscale-spring-and-java-step-by-step-tutorial-1fde | In today's data-driven world, the ability to perform efficient and powerful searches is crucial for any application. MyScale, a fast and open-source columnar database management system, offers a compelling solution by combining the power of SQL with [vector search capabilities](https://www.linkedin.com/pulse/natural-language-processing-vectors-vishal-mysore-inarc/?lipi=urn%3Ali%3Apage%3Ad_flagship3_pulse_read%3B83tngPv2SEOVGJjwK5rB%2Bw%3D%3D) . This combination enables semantic search, a method that improves search accuracy by understanding the meaning of the query. Here’s how you can leverage ClickHouse (MyScale) for semantic search, highlighting the advantages and potential use cases.
For comparison, I will demonstrate both approaches: one using Python and another showcasing how to build an enterprise application with Spring and Java.
By the end of this article, we will set up [CookGPT](https://www.linkedin.com/posts/vishalrow_im-thrilled-to-announce-the-launch-of-cookgpt-activity-7154863281965305856-3S0M/?lipi=urn%3Ali%3Apage%3Ad_flagship3_pulse_read%3B83tngPv2SEOVGJjwK5rB%2Bw%3D%3D), my personal open source Indian chef, by loading thousands of recipes into vectors and performing semantic searches on them.
> As always, I highly encourage you to read the complete article. However, if you want to directly look into the code, you can find it here. A demo version deployed on Hugging Face is available [here](https://huggingface.co/spaces/VishalMysore/vectorx)
Why Combine SQL with Vector Search?
Combining SQL with vector search allows you to harness the strengths of both paradigms:
SQL's Power and Flexibility: SQL is a powerful language for querying structured data, offering robust aggregation, filtering, and joining capabilities.
Vector Search for Semantic Understanding: Vector search enables finding similarities based on the meaning of the data rather than simple keyword matching. This is especially useful for applications involving natural language processing (NLP), image retrieval, and recommendation systems.
By integrating these two approaches, ClickHouse (MyScale) allows you to perform complex queries that can understand and process the semantic context of your data.
Setting Up MyScale for Semantic Search
To demonstrate how to use MyScale for semantic search, let’s walk through an example project setup using Spring Boot. Our goal is to create a table, process and insert records, and create a vector index for efficient querying.
Getting access to MyScale
[Free version of MyScale ](https://myscale.com/pricing/)can support 5 million 768-dimensional vectors . You can sign in with your GitHub account and setup is pretty straight forward and has good community support. Once setup you can access your dashboard with this [link](https://console.myscale.com/sql-workspace)
MyScale also features a web-based SQL Workspace, eliminating the need for an additional SQL client.
**Python Example**
Code for this example is [here](https://github.com/vishalmysore/vectorx/blob/main/notebook/myscale_cookgpt.ipynb)
```
import torch
from sentence_transformers import SentenceTransformer
# set device to GPU if available
device = 'cuda' if torch.cuda.is_available() else 'cpu'
# load the retriever model from huggingface model hub
retriever = SentenceTransformer('all-minilm-l6-v2', device=device)
```
This code snippet initializes a natural language processing model for semantic text similarity using the SentenceTransformer library with the 'all-minilm-l6-v2' model from Hugging Face. It first checks for GPU availability using torch, setting the device accordingly ('cuda' for GPU or 'cpu' for CPU). This setup ensures optimal performance by leveraging GPU acceleration when possible, enhancing the efficiency of semantic similarity computations for text data.
```
import pandas as pd
dataset = load_dataset("VishalMysore/newIndianCuisine")
data_raw = pd.DataFrame(dataset['train'])
# Display information about the cleaned DataFrame
print(data_raw.info())
```
This code snippet uses the datasets library to load the 'newIndianCuisine' dataset from Hugging Face's repository . It converts the 'train' split of this dataset into a Pandas DataFrame named data_raw. The print(data_raw.info()) statement then displays concise information about the DataFrame, including its structure, column names, data types, and memory usage, facilitating easy exploration and analysis of the dataset.
```
summary_raw = data_raw['Method'].values.tolist()
method_feature = []
for i in tqdm(range(0, len(summary_raw), 1)):
i_end = min(i+1, len(summary_raw))
# generate embeddings for summary
emb = retriever.encode(summary_raw[i:i_end]).tolist()[0]
method_feature.append(emb)
data_raw['method_feature'] = method_feature
```
This code snippet focuses on generating embeddings for the 'Method' column of the DataFrame data_raw. Initially, it extracts the textual summaries from the 'Method' column and converts them into a list (summary_raw). Using a loop that iterates through the list, it employs a retriever model (retriever) to encode each summary into embeddings (emb). These embeddings are then appended to the method_feature list. Finally, the generated embeddings are added back to the DataFrame as a new column named 'method_feature'. This process allows for the creation of numerical representations (embeddings) of textual data, facilitating tasks such as semantic analysis or similarity searches based on the content of the 'Method' descriptions.
```
client.command("""
CREATE TABLE default.myscale_cookgpt
(
id UInt64,
Recipe String,
"Total Time" String,
Method String,
Category String,
Ingredients String,
method_feature Array(Float32),
CONSTRAINT vector_len CHECK length(method_feature) = 384
)
ORDER BY id
""")
```
This code snippet executes a SQL command using client.command() to create a table named myscale_cookgpt in the ClickHouse database schema default. The table schema includes columns such as id of type UInt64, Recipe, Total Time, Method, Category, Ingredients, and method_feature as an array of Float32. Additionally, a constraint vector_len ensures that the method_feature array always has a length of 384 elements. The table is ordered by the id column during creation. This schema is designed to store data related to recipes, including their details and a vector representation ( method_feature ) for semantic analysis or similarity searches
```
client.command("""
ALTER TABLE default.myscale_cookgpt
ADD VECTOR INDEX method_feature_index method_feature
TYPE MSTG
('metric_type=Cosine')
""")
```
The command adds a vector index named method_feature_index to the column method_feature . The index is configured with a metric type of Cosine, indicating that it will be optimized for cosine similarity searches. Adding this vector index enhances the database's capability to efficiently perform similarity searches based on the embeddings stored in the method_feature column, thereby optimizing queries that involve semantic analysis or similarity computations in large datasets.
```
question = 'what recipe is made with Paneer?'
emb_query = retriever.encode(question).tolist()
```
**Java Example**
Now lets see the same example in Java and Spring. Connecting to MyScale using Java and Spring is straightforward, leveraging Hikari DataSource for simplicity and efficiency.
```
HikariConfig config = new HikariConfig();
config.setJdbcUrl(jdbcUrl);
config.setUsername(username);
config.setPassword(password);
// Set the maximum lifetime of a connection in the pool in milliseconds (e.g., 30 minutes)
config.setMaxLifetime(1800000);
// Set the maximum amount of time a connection is allowed to sit idle in the pool (e.g., 10 minutes)
config.setIdleTimeout(600000);
// Set the minimum number of idle connections that HikariCP tries to maintain in the pool
config.setMinimumIdle(2);
// Set the maximum size that the pool is allowed to reach, including both idle and in-use connections
config.setMaximumPoolSize(10);
dataSource = new HikariDataSource(config);
```
This code snippet configures a HikariCP data source with settings optimized for JDBC connection management: it sets a maximum connection lifetime of 30 minutes, an idle timeout of 10 minutes, maintains a minimum of 2 idle connections, and allows a maximum pool size of 10 connections. HikariConfig initializes these parameters, while HikariDataSource encapsulates the configuration for efficient database connection pooling, enhancing application performance by ensuring reliable and responsive database access.
```
public static float[] embed(String str) {
EmbeddingModel embeddingModel = new AllMiniLmL6V2EmbeddingModel();
TextSegment segment1 = TextSegment.from(str);
Embedding embedding1 = embeddingModel.embed(segment1).content();
return embedding1.vector();
}
public static Float[] embedAsObject(String str) {
float[] embQuery = embed(str);
Float[] embQueryObj = new Float[embQuery.length];
for (int i = 0; i < embQuery.length; i++) {
embQueryObj[i] = embQuery[i];
}
return embQueryObj;
}
```
This Java code defines two methods for generating embeddings using the AllMiniLmL6V2EmbeddingModel. The embed method takes a string input, creates a TextSegment from it, and generates an embedding vector as a float[]. The embedAsObject method converts this float[] into a Float[] to facilitate its use in contexts where an array of object type is required.
```
String insertSQL = """
INSERT INTO default.myscale_cookgpt
(id, Recipe, "Total Time", Method, Category, Ingredients, method_feature)
VALUES (?, ?, ?, ?, ?, ?, ?)
"""; pstmt.setArray(7, connection.createArrayOf("Float32", convertToFloatObjectArray(methodFeature)));
```
Prepares an SQL INSERT statement to add records into the myscale_cookgpt table in the ClickHouse database. The SQL statement inserts values for the columns id, Recipe, Total Time, Method, Category, Ingredients, and method_feature. The method feature is converted to a Float[] array using a helper method (convertToFloatObjectArray) which contains the embedding array prepared from the method string. This conversion ensures compatibility with the ClickHouse database. The PreparedStatement is then used to set the array for the method_feature column, ensuring that each feature vector is correctly inserted into the database.
```
Connection connection = myScaleConnection.getConnection();
String query = "SELECT Recipe, Method, distance(method_feature, ?) as dist " +
"FROM default.myscale_cookgpt " +
"ORDER BY dist LIMIT ?";
int topK = 2;
try (PreparedStatement pstmt = connection.prepareStatement(query)) {
Float[] embQuery = CreateEmbedding.embedAsObject(queryStr);
Array array = connection.createArrayOf("Float32", embQuery);
pstmt.setArray(1, array);
pstmt.setInt(2, topK);
try (ResultSet rs = pstmt.executeQuery()) {
List<String[]> summaries = new ArrayList<>();
while (rs.next()) {
String recipe = rs.getString("Recipe");
String method = rs.getString("Method");
summaries.add(new String[]{recipe, method});
}
// Print the summaries
for (String[] summary : summaries) {
log.info("Recipe: " + summary[0] + ", Method: " + summary[1]);
}
return summaries;
}
} catch (SQLException e) {
log.severe(e.getMessage());
throw new RuntimeException(e);
}
```
Connects to a MyScale database and performs a semantic search using cosine similarity. It retrieves the top-k results based on the distance between a given query's embedding vector and the stored method_feature vectors in the myscale_cookgpt table. The PreparedStatement sets the query embedding as a Float32 array and specifies the number of top results to return. The SQL query calculates the cosine similarity (distance(method_feature, ?) as dist) and orders the results by this distance. The results are then retrieved and printed, showing the most semantically similar recipes and their methods.
```
public List queryResult(String queryStr) {
Connection connection = myScaleConnection.getConnection();
String query = "SELECT Recipe, Method, distance(method_feature, ?) as dist " +
"FROM default.myscale_cookgpt " +
"ORDER BY dist LIMIT ?";
int topK = 2;
try (PreparedStatement pstmt = connection.prepareStatement(query)) {
Float[] embQuery = CreateEmbedding.embedAsObject(queryStr);
Array array = connection.createArrayOf("Float32", embQuery);
pstmt.setArray(1, array);
pstmt.setInt(2, topK);
try (ResultSet rs = pstmt.executeQuery()) {
List<String[]> summaries = new ArrayList<>();
while (rs.next()) {
String recipe = rs.getString("Recipe");
String method = rs.getString("Method");
summaries.add(new String[]{recipe, method});
}
// Print the summaries
for (String[] summary : summaries) {
log.info("Recipe: " + summary[0] + ", Method: " + summary[1]);
}
return summaries;
}
} catch (SQLException e) {
log.severe(e.getMessage());
throw new RuntimeException(e);
}
}
```
Finally query the data and see the result
> Please visit [here ](https://huggingface.co/spaces/VishalMysore/vectorx)for live demo
**Conclusion**
Advantages of Using SQL + Vector for Semantic Search
Efficient Query Execution: Columnar storage is optimized for reading large datasets, making it ideal for analytics and search applications.
Scalability: SQL databases designed to handle petabytes of data and high query loads, ensuring your search capabilities can scale with your needs.
Rich SQL Functionality: By combining SQL with vector search, you can perform complex queries that involve filtering, joining, and aggregating data based on semantic context.
Versatility: This setup can be enhanced for various use cases, such as recommendation systems, NLP applications, and image retrieval, where understanding the meaning of the data is crucial.
Enhancing the Solution for Other Use Cases
Recommendation Systems: By storing user preferences and item features as vectors, you can recommend items that are semantically similar to what the user likes.
Natural Language Processing: Store and search text embeddings to find documents or responses that are contextually relevant to a given query.
Image Retrieval: Use image embeddings to find similar images based on visual features rather than metadata alone.
By leveraging the combined power of SQL and vector search, this solution provides a robust and efficient platform for building advanced search and recommendation systems. This approach not only enhances search accuracy but also opens up new possibilities for data-driven applications. | vishalmysore |
|
1,913,319 | WIX Studio Submitted | --- This is a submission for the Wix Studio Challenge . What I Built Demo ... | 0 | 2024-07-06T01:48:45 | https://dev.to/alla_santoshpavankumar_/wix-studio-submitted-15bb | devchallenge, wixstudiochallenge, webdev, javascript |
---
*This is a submission for the [Wix Studio Challenge ](https://dev.to/challenges/wix).*
## What I Built
<!-- Share an overview about your project. -->
## Demo
<!-- Share a link to your Wix Studio app and include some screenshots here. -->
## Development Journey
<!-- Tell us how you leveraged Wix Studio’s JavaScript development capabilities-->
<!-- Which APIs and Libraries did you utilize? -->
<!-- Team Submissions: Please pick one member to publish the submission and credit teammates by listing their DEV usernames directly in the body of the post. -->
<!-- Don't forget to add a cover image (if you want). -->
<!-- Thanks for participating! → | alla_santoshpavankumar_ |
1,913,317 | IMPLEMENTING AZURE KEY VAULT | Azure Key Vault (AKV) is a cloud-based security service that provides secure storage, management, and... | 27,629 | 2024-07-06T01:36:22 | https://dev.to/aizeon/implementing-azure-key-vault-7he | azure, cloud, tutorial, cloudcomputing | Azure Key Vault (AKV) is a cloud-based security service that provides secure storage, management, and deployment of sensitive data, such as:
- Encryption and Cryptographic keys
- Certificates (SSL/TLS, Azure, etc.)
- Secrets (passwords, credentials, etc.)
AKV offers:
- Secure storage in a Hardware Security Module (HSM)
- Centralised management and organisation
- Access control and authentication
- Encryption and decryption services
- Key rotation and revocation
- Auditing and logging
- Integration with Azure services and applications
In this tutorial, I will be demonstrating how to access Azure Key Vault and utilising one of its capabilities to add a secret to the vault.
## **PREREQUISITE**
- Working computer
- Internet connection
- Microsoft Azure account + active subscription
## **PROCEDURE**
### **LOCATE THE AZURE KEY VAULT SERVICE**
Open the Azure portal and type “Key Vault” in the search bar at the top. Click on “Key vaults” under services as seen in the image below.
### **CREATE AN AZURE KEY VAULT**
On the Key Vault service webpage that loads, click on the “Create” or “Create key vault” button as you deem fit.
You will be directed to the “Basics” page.
The first part of the “Basics” page is the “Project details” section where you are asked to select the subscription and resource group under which you want to create the key Vault.
_PS: In case you want a new resource group, creating a resource group just requires you to provide a name in the input box provided after clicking on “Create new” beneath the “Resource group” input box._
The next section is “Instance details” where you can input a Key Vault name of choice, select a region and pricing tier as required.
Afterwards, click on the “Review + create” button.
A page as shown should appear showing the specifications selected and the details of the key vault.
Click on the “Create” button.
There will be a pop-up at the top right showing the status of the deployment.
You will be directed to a key vault deployment page which goes through several phases that you might need to be patient for.
When deployment has been completed, click on “Go to resource”.
The key vault resource page loads.
### **ADD ROLE ASSIGNMENTS**
On the resource page, click on “Access control (IAM)” on the side menu.
On the page that loads, click on “Add” then, “Add role assignment”
The “Role” page loads. Click on a suitable role (in this case, Key Vault Administrator) and then, click on the “Next” button.
On “Members” page, click on “Select members”.
On the pop-up window, select member by clicking on the user and then the “Select” button.
Click on “Review + assign” button.
There will be a pop-up at the top right showing the progress.
### **CREATE SECRET**
Once it is added, navigate to the menu and click on “Objects”, then “Secrets”.
On the “Secrets” page, click on “Generate/Import”.
On the page that loads, input secret name and value (password), set activation and expiry dates. Click on “Create”.
You should have a newly created secret in your azure key vault right about now.
| aizeon |
1,913,275 | How to Enable SonarCloud for Your Project | Introduction In this guide, we will walk through setting up SonarCloud for a GitHub... | 0 | 2024-07-06T01:27:14 | https://dev.to/olsido/how-to-enable-sonarcloud-for-your-project-aoi | # Introduction
In this guide, we will walk through setting up SonarCloud for a GitHub project to automatically inspect code for bugs and vulnerabilities. This will help ensure code quality and security in your project.
# Initial Setup of SonarCloud
I already have a project on GitHub, and I would like to enable SonarCloud on it to automatically inspect the code for bugs and vulnerabilities. Here is my project:
To enable SonarCloud, let's first open the following URL: http://sonarcloud.io, which will redirect to https://www.sonarsource.com/products/sonarcloud/. Then click on the "SIGN UP" button:
Sign up with GitHub:
This will redirect you to GitHub, where you will enter your username and password:
...and then give SonarCloud certain permissions:
SonarCloud will ask you to configure your GitHub organization:
Once you click on "Import an organization," it will ask you if you want to import all the repositories of that organization or only the selected ones. I will only import one repository:
After clicking the "Install" button, it will ask a few more questions:
Then choose the free plan - you can do that as long as your repository is a public repository:
The next step is analyzing your projects. At this point, there is only one organization available - the one you just created. You can select the project to analyze from your GitHub projects that you agreed to import earlier, and then click the "Set Up" button:
A few more additional settings about how you want your project analyzed - select whether to analyze once the new version appears or analyze once a certain number of days passes. I chose the first option and then clicked on "Create project":
That's all SonarCloud needed to start analyzing the code. Now it brings you to the dashboard, and you need to wait for it to finish its first analysis:
# Analysis Result
Voilà! The first analysis of my project is done. It found one issue (it is a little sample project):
We can click on that issue to see the details:
...and we can drill down even more once we click on the issue description, including the code snippets:
Now you've connected your project to SonarCloud! For most languages, it will run automatic analysis, so every time anything changes, your results will be up to date.
# Conclusion
With SonarCloud set up, you can now enjoy automatic code quality checks for your GitHub projects. This ensures that your code remains secure and free from vulnerabilities. As the next step, you can configure Sonar as an automatic workflow in GitHub or other systems to maintain high code quality. | olsido |
|
1,913,316 | Creating Users and Groups with Bash Script: A Comprehensive Guide | The ng_users.sh Script Below is the detailed explanation of each section in the ng_users.sh... | 0 | 2024-07-06T01:26:38 | https://dev.to/udealor_ngozika_d9ec8be50/creating-users-and-groups-with-bash-script-a-comprehensive-guide-1n8e | The ng_users.sh Script
Below is the detailed explanation of each section in the ng_users.sh script:
```
```
#!/bin/bash
# Log file and secure passwords file
LOGFILE="/var/log/user_management.log"
PASSWORD_FILE="/var/secure/user_passwords.txt"
# Ensure the secure passwords file exists and set the correct permissions
sudo mkdir -p /var/secure
sudo touch $PASSWORD_FILE
sudo chmod 600 $PASSWORD_FILE
# Function to generate a random password
generate_password() {
openssl rand -base64 12
}
# Check if openssl is installed
if ! command -v openssl &> /dev/null; then
echo "openssl is required but not installed. Please install it and try again." >&2
exit 1
fi
#Read the input file line by line
while IFS=';' read -r username groups; do
# Remove any leading or trailing whitespace
username=$(echo "$username" | xargs)
groups=$(echo "$groups" | xargs)
# Create a personal group with the same name as the username
if ! getent group "$username" > /dev/null 2>&1; then
if sudo groupadd "$username"; then
echo "$(date '+%Y-%m-%d %H:%M:%S') - Group '$username' created." >> "$LOGFILE"
else
echo "$(date '+%Y-%m-%d %H:%M:%S') - Error creating group '$username'." >> "$LOGFILE"
continue
fi
else
echo "$(date '+%Y-%m-%d %H:%M:%S') - Group '$username' already exists." >> "$LOGFILE"
fi
# Create the user if it does not exist
if ! id -u "$username" > /dev/null 2>&1; then
if sudo useradd -m -s /bin/bash -g "$username" "$username"; then
echo "$(date '+%Y-%m-%d %H:%M:%S') - User '$username' created." >> "$LOGFILE"
# Generate a random password for the user
password=$(generate_password)
echo "$username:$password" | sudo chpasswd
echo "$username:$password" | sudo tee -a "$PASSWORD_FILE" > /dev/null
# Set ownership and permissions for the user's home directory
sudo chown "$username":"$username" "/home/$username"
sudo chmod 700 "/home/$username"
echo "$(date '+%Y-%m-%d %H:%M:%S') - Password for '$username' set and stored securely." >> "$LOGFILE"
else
echo "$(date '+%Y-%m-%d %H:%M:%S') - Error creating user '$username'." >> "$LOGFILE"
continue
fi
else
echo "$(date '+%Y-%m-%d %H:%M:%S') - User '$username' already exists." >> "$LOGFILE"
fi
# Add user to additional groups
IFS=',' read -ra group_array <<< "$groups"
for group in "${group_array[@]}"; do
group=$(echo "$group" | xargs)
if ! getent group "$group" > /dev/null 2>&1; then
if sudo groupadd "$group"; then
echo "$(date '+%Y-%m-%d %H:%M:%S') - Group '$group' created." >> "$LOGFILE"
else
echo "$(date '+%Y-%m-%d %H:%M:%S') - Error creating group '$group'." >> "$LOGFILE"
continue
fi
fi
if sudo usermod -aG "$group" "$username"; then
echo "$(date '+%Y-%m-%d %H:%M:%S') - User '$username' added to group '$group'." >> "$LOGFILE"
else
echo "$(date '+%Y-%m-%d %H:%M:%S') - Error adding user '$username' to group '$group'." >> "$LOGFILE"
fi
done
done < "$1"
1. Initializing Variables
We define the log file path (LOGFILE) and the secure passwords file path (PASSWORD_FILE). These files will store logs and securely store passwords, respectively.
2. Generating Random Passwords
We create a function called generate_password() that uses openssl to generate a random 12-character password. This function will be used later to set passwords for users.
3. Checking Dependencies
We check if openssl is installed. If not, we exit the script with an error message.
4. Reading Input File
We read the input file line by line, splitting each line into username and groups. We remove any leading or trailing whitespace.
5. Creating Personal Groups
For each user, we create a personal group with the same name as the username (if it doesn’t exist). We log the action in the LOGFILE.
6. Creating Users
If the user doesn’t exist, we create the user, set a random password, and securely store it. We also set ownership and permissions for the user’s home directory.
7. Adding Users to Additional Groups
We read the comma-separated groups and add the user to each group (if the group doesn’t exist). We log these actions as well.
8. Conclusion
The script ensures that all requirements are met, including logging and secure password storage.
Technical Article
I’ve written a detailed technical article explaining the script step by step. You can find it on the HNG website: Creating Users and Groups with Bash Script. https://hng.tech/premium ,https://hng.tech/hire.
| udealor_ngozika_d9ec8be50 |
|
1,913,315 | Creating Users and Groups with Bash Script: A Comprehensive Guide | The ng_users.sh Script Below is the detailed explanation of each section in the ng_users.sh... | 0 | 2024-07-06T01:26:38 | https://dev.to/udealor_ngozika_d9ec8be50/creating-users-and-groups-with-bash-script-a-comprehensive-guide-396g | The ng_users.sh Script
Below is the detailed explanation of each section in the ng_users.sh script:
```
```
#!/bin/bash
# Log file and secure passwords file
LOGFILE="/var/log/user_management.log"
PASSWORD_FILE="/var/secure/user_passwords.txt"
# Ensure the secure passwords file exists and set the correct permissions
sudo mkdir -p /var/secure
sudo touch $PASSWORD_FILE
sudo chmod 600 $PASSWORD_FILE
# Function to generate a random password
generate_password() {
openssl rand -base64 12
}
# Check if openssl is installed
if ! command -v openssl &> /dev/null; then
echo "openssl is required but not installed. Please install it and try again." >&2
exit 1
fi
#Read the input file line by line
while IFS=';' read -r username groups; do
# Remove any leading or trailing whitespace
username=$(echo "$username" | xargs)
groups=$(echo "$groups" | xargs)
# Create a personal group with the same name as the username
if ! getent group "$username" > /dev/null 2>&1; then
if sudo groupadd "$username"; then
echo "$(date '+%Y-%m-%d %H:%M:%S') - Group '$username' created." >> "$LOGFILE"
else
echo "$(date '+%Y-%m-%d %H:%M:%S') - Error creating group '$username'." >> "$LOGFILE"
continue
fi
else
echo "$(date '+%Y-%m-%d %H:%M:%S') - Group '$username' already exists." >> "$LOGFILE"
fi
# Create the user if it does not exist
if ! id -u "$username" > /dev/null 2>&1; then
if sudo useradd -m -s /bin/bash -g "$username" "$username"; then
echo "$(date '+%Y-%m-%d %H:%M:%S') - User '$username' created." >> "$LOGFILE"
# Generate a random password for the user
password=$(generate_password)
echo "$username:$password" | sudo chpasswd
echo "$username:$password" | sudo tee -a "$PASSWORD_FILE" > /dev/null
# Set ownership and permissions for the user's home directory
sudo chown "$username":"$username" "/home/$username"
sudo chmod 700 "/home/$username"
echo "$(date '+%Y-%m-%d %H:%M:%S') - Password for '$username' set and stored securely." >> "$LOGFILE"
else
echo "$(date '+%Y-%m-%d %H:%M:%S') - Error creating user '$username'." >> "$LOGFILE"
continue
fi
else
echo "$(date '+%Y-%m-%d %H:%M:%S') - User '$username' already exists." >> "$LOGFILE"
fi
# Add user to additional groups
IFS=',' read -ra group_array <<< "$groups"
for group in "${group_array[@]}"; do
group=$(echo "$group" | xargs)
if ! getent group "$group" > /dev/null 2>&1; then
if sudo groupadd "$group"; then
echo "$(date '+%Y-%m-%d %H:%M:%S') - Group '$group' created." >> "$LOGFILE"
else
echo "$(date '+%Y-%m-%d %H:%M:%S') - Error creating group '$group'." >> "$LOGFILE"
continue
fi
fi
if sudo usermod -aG "$group" "$username"; then
echo "$(date '+%Y-%m-%d %H:%M:%S') - User '$username' added to group '$group'." >> "$LOGFILE"
else
echo "$(date '+%Y-%m-%d %H:%M:%S') - Error adding user '$username' to group '$group'." >> "$LOGFILE"
fi
done
done < "$1"
```
```
1. Initializing Variables
We define the log file path (LOGFILE) and the secure passwords file path (PASSWORD_FILE). These files will store logs and securely store passwords, respectively.
2. Generating Random Passwords
We create a function called generate_password() that uses openssl to generate a random 12-character password. This function will be used later to set passwords for users.
3. Checking Dependencies
We check if openssl is installed. If not, we exit the script with an error message.
4. Reading Input File
We read the input file line by line, splitting each line into username and groups. We remove any leading or trailing whitespace.
5. Creating Personal Groups
For each user, we create a personal group with the same name as the username (if it doesn’t exist). We log the action in the LOGFILE.
6. Creating Users
If the user doesn’t exist, we create the user, set a random password, and securely store it. We also set ownership and permissions for the user’s home directory.
7. Adding Users to Additional Groups
We read the comma-separated groups and add the user to each group (if the group doesn’t exist). We log these actions as well.
8. Conclusion
The script ensures that all requirements are met, including logging and secure password storage.
Technical Article
I’ve written a detailed technical article explaining the script step by step. You can find it on the HNG website: Creating Users and Groups with Bash Script.
| udealor_ngozika_d9ec8be50 |
|
1,913,305 | Send email with nodejs | Prerequisites an e-mail address (to be used for sending e-mails) the package... | 0 | 2024-07-06T01:22:26 | https://dev.to/patzi275/send-email-with-nodejs-1ajh | backend, webdev, node, beginners | ## Prerequisites
- an e-mail address (to be used for sending e-mails)
- the package nodemail
```bash
npm install nodemail
# For typescript projects
npm install nodemail @types/nodemail
```
The email address used must have « *2-factor authentication enabled* ». To find out how to activate it, click here: [2-factor authentication](https://support.google.com/accounts/answer/185839?hl=en&co=GENIE.Platform%3DDesktop)
Also, you'll need to provide `nodemail` with your account authentication information. This includes your email address and a password, but not just any password.
Google has a platform that **allows you to generate separate passwords**. These passwords are only used for third-party services such as email clients, email applications (like Nodemailer), and other tools that require secure access to your Google Account.
To do this, you need to :
- Go to link : [https://myaccount.google.com/apppasswords](https://myaccount.google.com/apppasswords)
- Make sure you are logged in to your sender account
- Create a new application
- Copy the supplied password
> 💡 If the interface is empty, this means you haven't activated [2-factor authentication](https://support.google.com/accounts/answer/185839?hl=en&co=GENIE.Platform=Desktop)
## Development
First, here's a complete example for those of you who understand quickly. Let's say you want to send a nice email to several friends. Here's how to do it:
```jsx
const nodemailer = require('nodemailer');
// create reusable transporter object using the default SMTP transport
let transporter = nodemailer.createTransport({
service: 'gmail',
auth: {
user: '[email protected]',
pass: 'votre_mot_de_passe'
}
});
// setup email data with unicode symbols
let mailOptions = {
from: '"Fred Foo 👻" <[email protected]>', // sender address
to: '[email protected], [email protected]', // list of receivers
subject: 'Hello ✔', // Subject line
text: 'Hello world?', // plain text body
html: '<b>Hello world?</b>' // html body
};
// send mail with defined transport object
transporter.sendMail(mailOptions, (error, info) => {
if (error) {
return console.log(error);
}
console.log('Message sent: %s', info.messageId);
console.log('Preview URL: %s', nodemailer.getTestMessageUrl(info));
});
```
Don't forget to replace `[email protected]` and `your_password` with your own authentication information.
## Explanation
1. Import module :
```jsx
const nodemailer = require('nodemailer');
```
We start by importing `nodemailer`. Of course, you can also use the ES6 syntax `import nodemail from 'nodemail';`
2. Create a "transporter" :
```jsx
const transporter = nodemailer.createTransport({
service: 'gmail',
auth: {
user: '[email protected]',
pass: 'your_password'
}
});
```
Here, we configure our mailman with our Gmail account information. We give him our email address and password so he can access our mailbox and send messages for us.
3. **Prepare the email** :
```jsx
let mailOptions = {
from: '"Fred Foo 👻" <[email protected]>', // Who sends the email
to: '[email protected], [email protected]', // Who to send the email to
subject: 'Hello ✔', // Email subject
text: 'Hello world?', // Plain text or
html: '<b>Hello world?</b>' // HTML content
};
```
We write our email. We define who's sending it (here, Fred Foo), who it's for (several friends), the subject (e.g. "Hello ✔"), and the content (a nice message in text or HTML).
4. **Send the email** :
```jsx
transporter.sendMail(mailOptions, (error, info) => {
if (error) {
return console.log(error);
}
console.log('Message sent: %s', info.messageId);
console.log('Preview URL: %s', nodemailer.getTestMessageUrl(info));
});
```
Finally, we ask our digital letter carrier to send the e-mail. If there's a problem (for example, if the password is incorrect), we display the error. Otherwise, we indicate that the e-mail has been sent and even provide a link to view the e-mail sent (handy for checking).
> 💡 Never put your password in plain text in your code! Use environment variables or password management services to keep your information safe.
Basically, it's like asking a trusted mailman to send an e-mail using your Gmail account.
---
Now you need to be able to send emails anywhere in the world. If you have any questions, don't hesitate to ask. Happy coding ✨ | patzi275 |
1,903,762 | Microsoft Is Holding My Account HOSTAGE! | Hello, dev.to! It is my displeasure to announce, today, that Microsoft – yes, the multibillion... | 0 | 2024-07-06T01:11:33 | https://dev.to/baenencalin/microsoft-is-holding-my-account-hostage-47f | watercooler, security, help, discuss | Hello, `dev.to`!
It is my displeasure to announce, today, that Microsoft – yes, the multibillion dollar company – is holding my Microsoft account hostage.
<hr />
I have two main questions for everyone:
- How can I find and contact Microsoft employees?
- How, and where, can I make a big enough splash online to get on Microsoft's radar?
And I have four main concerns I wish to address:
- How I ended up where I am now.
- Microsoft's lack of attention to detail when designing a log-in system.
- Microsoft's slipperiness and noncooperation.
- What I am trying to do to rectify this issue.
<hr />
## Table of Contents
[*What happened?*](#what-happened)
[*How Microsoft Plays A Part*](#how-microsoft-plays-a-part)
[*Microsoft's Coldness*](#microsofts-coldness)
[*What's next?*](#whats-next)
<br />
## What happened?
Recently, my Microsoft account was hijacked, which I wrote [an article about](https://www.deviantart.com/kattytheenby/journal/My-Microsoft-account-has-been-hijacked-1063123262).
In summary, there was a (cleverly designed) phishing scam which got a hold of my Microsoft account by tricking me into giving them a OTP – and, as I recall, it didn't even require me to give them my email address, I was brought straight to Microsoft's log-in prompt.
## How Microsoft Plays A Part
While phishing is usually thought to be the equally the fault of the scammer and the victim, certain phishing scams are more advanced than others and take advantage of a system that's already in place, which is the case here.
This scam took advantage of the vague wording of Microsoft's emails to convince me to give them a OTP under the pretext that it is a "verification code".
So, what did Microsoft's email, containing my one-time-password, look like?
This:
How could anyone fall for this?
Well, it's because of the vague wording – the use of "security code" instead of "one-time-password" or "account access code".
What's worse is that Microsoft has different types of "security code"s, which are also six-digit numbers, much like this OTP.
What else does Microsoft use these security codes for?
Verifying your email when you first sign up for a Microsoft account, verifying your email when you are talking to one of Microsoft's virtual chat agents, when confirming signins, et cetera. — While all these things are very similar, it can become confusing what code is a OTP and isn't a OTP.
While I should have maybe smelled something fishy when I got a code via email, I mistakenly thought that this code was in the vein of something like a Google Authenticator or Microsoft Authenticator code, especially due to the form and nature of the code.
Also, compare that email with this one, which does clearly state the intention of the code:
## Microsoft's Coldness
Since about June fourteenth, I've been trying to get my account back; however, Microsoft has done very little to cooperate.
I tried to use both [the ACSR (Automated Customer Support Representative) form](https://account.live.com/acsr) and [the Account Reinstatement form](https://www.microsoft.com/en-us/concern/AccountReinstatement), but it has yielded very poor results.
At first, I was able to get Microsoft to realize that there was indeed illegitimate activity on my account.
... However, after some back-and-forth, I was emailed by a Microsoft employee, named Rhodz, that I would not get my account back due to "a severe violation of the Microsoft Service Agreement" — when I asked for elaboration, though, an employee named Luis refused to tell me what the violation was, saying *“Pursuant to our terms, we cannot reactivate your account, nor provide details as to why it was closed. ”*.
After talking with some more live support agents, I was told by one, named Angela, that "my account being hijacked can be the main reason the system disabled it".
## What's next?
What am I going to do now...?
Well, I'm not quite sure.
I was hoping some people – along with discussing Microsoft's behavior – would be able to give me some suggestions for what to do.
Currently, the plan is just to become a hemorrhoid on Microsoft's ass, as being inert is going to lead to even poorer results.
<hr />
<br />
So... what do you all think of Microsoft's actions?
Do you think they play a part in this, like I do, or no?
<br />
<b><center><b>Thanks for reading!<br />Cheers!</b></center></b> | baenencalin |
1,913,266 | Automatizando o versionamento semântico com Git Hooks | Cenário Venho trabalhando na criação de uma biblioteca para componentizar um design system... | 0 | 2024-07-06T01:06:23 | https://dev.to/alexislopes/automatizando-o-versionamento-semantico-com-git-hooks-h1g | ---
title: Automatizando o versionamento semântico com Git Hooks
published: true
description:
tags:
cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/uaudx5prnr2bajfv4gd4.png
# Use a ratio of 100:42 for best results.
# published_at: 2024-07-05 23:47 +0000
---
## Cenário
Venho trabalhando na criação de uma biblioteca para componentizar um design system e durante este processo, senti a necessidade de automatizar a atualização de versão para evitar precisar fazer isso manualmente toda vez.
Pensei em criar algo que pudesse pelo menos semi-automatizar os incrementos de cada seção da versão, assim, toda vez que houvesse um merge na branch master, a versão seria incrementada. Já que normalmente a master é a linha do tempo estável, para produção.
## Contexto
No GitFlow a master pode ser atualizada de duas maneiras: a primeira é pelo fechamento de uma release. A outra, pelo fechamento de uma hotfix.
|  |  |
|---------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------|
Normalmente, o que é tratado em uma `hotfix` tende a ser ajustes pontuais ou correções de bugs, sendo assim, atualizar apenas o patch está de bom tamanho.
Já para o que vem de uma release é um conteúdo mais substancial, então eu queria a possibilidade de escolher se eu atualizo a major, minor ou patch da nova versão.
## Abordagem
Pensei em criar um script para rodar na linha de comando para lidar com estes casos, e aliar isso aos hooks do git acaba sendo bastante pertinente.
### O git hook
Para o hook, dado o contexto, faz sentido usar o de [`post-merge`](https://git-scm.com/docs/githooks#_post_merge), que promete ser invocado sempre que um merge é realizado com sucesso. Contei com a ajuda da lib [`husky`](https://typicode.github.io/husky/) para lidar melhor com os hooks.
```bash
#!/bin/bash
current_branch=$(git rev-parse --abbrev-ref HEAD)
commit_message=$(git log -1 --pretty=%B)
if [ "$current_branch" == "master" ]; then
npm test
if [[ "$commit_message" == *"release/"* ]]; then
start node bump.js ; exit
elif [[ "$commit_message" == *"hotfix/"* ]]; then
npm version patch
fi
fi
```
O comando `git rev-parse --abbrev-ref HEAD` nos diz qual é a branch atual e o `git log -1 --pretty=%B` recupera qual foi a última mensagem de commit.
No GitFlow, sempre quando mergeamos uma branch, uma mensagem de commit é aplicada no modelo *Merge branch release/nome_da_release*, o mesmo acontece com a hotfix. Por isso recuperar a última mensagem de commit é importante, é nela que terá nosso fator condicional.
Um dos requisitos é que funcionasse apenas na branch master o que explica a primeira condicional, uma vez que estamos na master, é verificado se o ultimo commit vem de uma release ou hotflix, como está no trecho acima.
### O script de escolha
Essa é a parte do texto onde confesso que nunca tinha feito um CLI antes. Não sabia por onde começar. Foi então que lembrei que o CLI do Vite é bem legalzinho e fui ver o que eles usam por lá.
Para minha felicidade, é feito em JavaScript. Usando um conjuntos dos pacotes `cross-spawn`, `prompts` e `kolorist`
- `cross-spawn`: para rodar comandos de linha de comando.
- `prompts`: para criar prompts interativos e inquerir informações do usuário
- `kolorist`: adiciona cores aos prompts
```javascript
//./bump.js
import spawn from 'cross-spawn';
import prompts from "prompts";
import pkg from "./package.json" assert { type: 'json' };
import {
cyan,
green,
magenta,
yellow
} from 'kolorist';
(async () => {
const current_major = Number(pkg.version[0])
const current_minor = Number(pkg.version[2])
const current_patch = Number(pkg.version[4])
const choices = [
{
title: green(`Major`),
description: `${pkg.version} ➡️ ${`${current_major + 1}.0.0`}`,
value: 'npm version major',
},
{
title: cyan(`Minor`),
description: `${pkg.version} ➡️ ${current_major}.${current_minor + 1}.0`,
value: 'npm version minor',
},
{
title: yellow("Patch"),
description: `${pkg.version} ➡️ ${current_major}.${current_minor}.${current_patch + 1}`,
value: 'npm version patch',
}
]
const response = await prompts({
type: 'select',
name: 'value',
message: `Você acabou de realizar o fechamento de uma release.
Para que o fluxo possa continuar, atualize a versão da lib ${magenta(pkg.name)}.
Qual das opções abaixo mais faz sentido para as alterações presentes nesta release?
Lembrando:
${green('MAJOR')}: é a versão que contém mudanças incopatíveis, breaking changes.
${cyan('MINOR')}: é a versão que adiciona funcionalidades, com campatibilidade.
${yellow('PATCH')}: é a versão que adiciona ajustes gerais ou de bugs, mantendo compatibilidade.
Escolha 👇
`,
initial: 2,
choices
});
const { status } = spawn.sync(response.value, [], {
stdio: 'inherit',
})
process.exit(status ?? 0)
})();
```
No código, a ideia foi pegar a versão atual importando o package.json e em cima disso, calcular as possíveis novas versões para major, minor e patch e transformar isso em escolhas para o usuário. Dependendo da escolha, o comando npm é rodado para atualizar a versão.
Com isso, o objetivo foi atingido. agora, sempre que a master for alimentada pela hotfix ou release, a versão será incrementada para patch ou abrirá o terminal para escolha dependendo da qualidade do conteúdo da release, a escolha do usuário.
| alexislopes |
|
1,913,192 | Identificando Code Smells em JavaScript | Fala devs, tudo bem? Nesse post vou falar sobre um tópico importante que às vezes passa despercebido,... | 0 | 2024-07-06T01:05:00 | https://dev.to/robertoumbelino/identificando-code-smells-em-javascript-41ll | javascript, programming, beginners, braziliandevs | Fala devs, tudo bem? Nesse post vou falar sobre um tópico importante que às vezes passa despercebido, que são os **Code Smells**. 🐽
#### 📑 Sobre
**Code Smells** são sinais de que algo pode estar errado no seu código. Eles não são bugs propriamente ditos, mas indicam problemas de design que podem levar a bugs no futuro. Basicamente, são aqueles "toques" que fazem você pensar: "Hmm, isso pode causar problemas mais tarde." Vamos dar uma olhada em alguns exemplos em JavaScript! 😎
---
### 1. **Duplicated Code (Código Duplicado)**
Código duplicado é tipo quando você cola o mesmo trecho de código em várias partes do seu projeto, aí depois dá aquele nó e vira uma bagunça pra manter tudo certinho.
```javascript
function calcularPrecoTotalComImposto(preco, taxaImposto) {
return preco + (preco * taxaImposto);
}
function calcularPrecoTotalComDescontoEImposto(preco, desconto, taxaImposto) {
const precoComDesconto = preco - desconto;
// Código duplicado
return precoComDesconto + (precoComDesconto * taxaImposto);
}
```
Refatorado:
```javascript
// Código refatorado
function calcularPrecoTotalComImposto(preco, taxaImposto) {
return preco + (preco * taxaImposto);
}
function calcularPrecoTotalComDescontoEImposto(preco, desconto, taxaImposto) {
const precoComDesconto = preco - desconto;
return calcularPrecoTotalComImposto(precoComDesconto, taxaImposto);
}
```
---
### 2. **Long Method (Método Longo)**
Um método longo é aquele que faz muitas operações em sequência, fazendo com que fique muito difícil de entender e modificar.
```javascript
// Método longo
function processarPedido(pedido) {
// Validar pedido
if (!pedido.id || !pedido.itens || pedido.itens.length === 0) {
throw new Error('Pedido inválido');
}
// Calcular preço total
const precoTotalInicial = itens.reduce((total, item) => total + item.preco * item.quantidade, 0);
// Aplicar desconto
const precoComDesconto = pedido.desconto ? precoTotalInicial - pedido.desconto : precoTotalInicial;
// Aplicar imposto
const taxaImposto = 0.1;
const precoFinal = precoComDesconto + precoComDesconto * taxaImposto;
// Finalizar pedido
console.log(`Pedido ${pedido.id} processado com preço total ${precoFinal.toFixed(2)}`);
}
```
Refatorado:
```javascript
// Método refatorado
function validarPedido(pedido) {
if (!pedido.id || !pedido.itens || pedido.itens.length === 0) {
throw new Error('Pedido inválido');
}
}
function calcularPrecoTotal(itens, desconto = 0) {
const precoTotal = itens.reduce((total, item) => total + item.preco * item.quantidade, 0);
return precoTotal - desconto;
}
function aplicarImposto(precoTotal) {
return precoTotal * 1.1;
}
function processarPedido(pedido) {
validarPedido(pedido);
const precoTotal = calcularPrecoTotal(pedido.itens, pedido.desconto);
const precoTotalComImposto = aplicarImposto(precoTotal);
console.log(`Pedido ${pedido.id} processado com preço total ${precoTotalComImposto.toFixed(2)}`);
}
```
---
### 3. **Large Class (Classe Grande)**
Uma classe grande tem muitas responsabilidades ou métodos, o que pode indicar que ela está fazendo mais do que deveria e pode ser difícil de manter.
```javascript
// Classe grande
class Pedido {
constructor(id, itens, desconto) {
this.id = id;
this.itens = itens;
this.desconto = desconto;
}
validar() {
if (!this.id || !this.itens || this.itens.length === 0) {
throw new Error('Pedido inválido');
}
}
calcularPrecoTotal() {
const precoTotal = itens.reduce((total, item) => total + item.preco * item.quantidade, 0);
return precoTotal - desconto;
}
aplicarImposto(precoTotal) {
return precoTotal * 1.1;
}
processar() {
this.validar();
let precoTotal = this.calcularPrecoTotal();
precoTotal = this.aplicarImposto(precoTotal);
console.log(`Pedido ${this.id} processado com preço total ${precoTotal}`);
}
}
```
Refatorado:
```javascript
// Classes refatoradas
class ValidadorDePedido {
static validar(pedido) {
if (!pedido.id || !pedido.itens || pedido.itens.length === 0) {
throw new Error('Pedido inválido');
}
}
}
class CalculadoraDePreco {
static calcularPrecoTotal(itens, desconto = 0) {
const precoTotal = itens.reduce((total, item) => total + item.preco * item.quantidade, 0);
return precoTotal - desconto;
}
}
class CalculadoraDeImposto {
static aplicarImposto(precoTotal) {
return precoTotal * 1.1;
}
}
class ProcessadorDePedido {
constructor(pedido) {
this.pedido = pedido;
}
processar() {
ValidadorDePedido.validar(this.pedido);
const precoTotal = CalculadoraDePreco.calcularPrecoTotal(this.pedido.itens, this.pedido.desconto);
const precoTotalComImposto = CalculadoraDeImposto.aplicarImposto(precoTotal);
console.log(`Pedido ${this.pedido.id} processado com preço total ${precoTotalComImposto.toFixed(2)}`);
}
}
```
---
### 4. **Feature Envy (Inveja de Funcionalidade)**
Feature Envy ocorre quando uma classe utiliza excessivamente métodos ou dados de outra classe, o que pode indicar uma distribuição inadequada de responsabilidades.
```javascript
// Feature Envy
class Cliente {
constructor(nome, endereco) {
this.nome = nome;
this.endereco = endereco;
}
}
class Pedido {
constructor(cliente, itens) {
this.cliente = cliente;
this.itens = itens;
}
imprimirEtiquetaDeEnvio() {
console.log(`Envio para: ${this.cliente.nome}, ${this.cliente.endereco}`);
}
}
```
Refatorado:
```javascript
// Refatorado para mover a responsabilidade
class Cliente {
constructor(nome, endereco) {
this.nome = nome;
this.endereco = endereco;
}
obterEtiquetaDeEnvio() {
return `Envio para: ${this.nome}, ${this.endereco}`;
}
}
class Pedido {
constructor(cliente, itens) {
this.cliente = cliente;
this.itens = itens;
}
imprimirEtiquetaDeEnvio() {
console.log(this.cliente.obterEtiquetaDeEnvio());
}
}
```
---
### 5. **Primitive Obsession (Obsessão por Primitivos)**
Primitive Obsession é quando se utiliza primitivos (como strings e números) para representar conceitos que deveriam ser encapsulados em classes específicas, resultando em código menos legível e mais difícil de manter.
```javascript
// Primitive Obsession
class Pedido {
constructor(id, itens, codigoDesconto) {
this.id = id;
this.itens = itens;
this.codigoDesconto = codigoDesconto;
}
aplicarDesconto() {
if (this.codigoDesconto === 'SAVE10') {
// Aplicar desconto de 10%
} else if (this.codigoDesconto === 'SAVE20') {
// Aplicar desconto de 20%
}
}
}
```
Refatorado:
```javascript
// Refatorado para usar classes específicas
class Desconto {
constructor(codigo, porcentagem) {
this.codigo = codigo;
this.porcentagem = porcentagem;
}
aplicar(precoTotal) {
return precoTotal - (precoTotal * this.porcentagem / 100);
}
}
class Pedido {
constructor(id, itens, desconto) {
this.id = id;
this.itens = itens;
this.desconto = desconto;
}
aplicarDesconto(precoTotal) {
if (this.desconto) {
return this.desconto.aplicar(precoTotal);
}
return precoTotal;
}
}
```
---
Curtiu o post? Ainda há outros exemplos que poderiam ser citados, mas isso deixaria o post muito longo 😋, mas espero que esses exemplos ajudem de alguma forma a você conseguir identificar e corrigir os `code smells` no seu projeto. 🚀 | robertoumbelino |
1,913,277 | Webpack Alternatives | It is best to separate the code into smaller files when developing an app or a website that needs... | 0 | 2024-07-06T01:03:26 | https://dev.to/devops_den/webpack-alternatives-3noc | webdev, javascript, beginners, tutorial |
It is best to separate the code into smaller files when developing an app or a website that needs numerous packages, source files, and dependencies. You can use module bundlers to arrange and merge multiple files of JavaScript code into a single file. Webpack is one such popular open-source module bundler. It is primarily designed for JavaScript and can convert front-end assets.
Do you know that the complexity of the configuration and the slow speed of the Webpack makes it outdated? So you don't have to use [Webpack](https://medium.com/@devopsden007/getting-started-with-webpack-everything-you-need-to-know-64f653080abc) anymore! There are plenty of better alternatives that can be used to build your JavaScript and they also provide a better developer experience.
## Top 10 Webpack Alternatives
### 1. Gulp
Gulp is an open-source, free task runner for JavaScript applications and architectures. This JavaScript toolkit can stream build systems in front-end web development. This task runner is created on node.js and npm, making it relatively easy to use and manage. It is primarily utilized to automate repetitive web development processes, such as unit testing, optimization, cache busting, etc.
To specify tasks, Gulp utilizes a code-over-configuration method, executing tasks by the one-purpose plugins. Users can specify the tasks by writing their plugins. Gulp is compatible with different web applications. This automated task runner can optimize and automate website resources, enhancing overall efficiency.
#### Key features:
- Features code-over-configuration
- Flexible and composable
- Comes with numerous community-built-in plugins
- Supports TypeScript
- Compatible with React JS, Angular JS, and other Javascript architectures
### 2. Browserify
Browserify is another free, open-source JavaScript bundler tool and is a great alternative to Webpack. This tool lets you directly write Node.js modules in the browser. You can bundle your JavaScript dependencies into a single file, and it easily integrates with npm. It has an in-built automatic build system to build modules quickly.
This module bundler is compatible with Linux, macOS, and Windows operating systems. Using the Browserify tool, it is possible to directly access numerous resources of the NPM ecosystem from the client. All necessary module sources and dependencies are added to source.js, and then bundled into target.js.
#### Key features:
- Simple npm integrations
- Features an in-built automatic build system that makes building modules fast and straightforward.
- Bunyan, jsdom, Babel, and imageboss integrated tools
- Easy to reuse your node code
### 3. Parcel
Developed in Rust, Parcel is another popular Webpack alternative. This JavaScript module bundler accepts different types of files as an entry point. Parcel supports a wide range of file formats, including photos, videos, fonts, and several well-known languages, like Typescript and many more. This module bundler is ideal for beginners because it does not need any configurations.
Parcel boosts the speed for initial builds and is very easy to use. It also has a file system cache that saves the compiled results per file. Utilizing modern multicore processors, it compiles your code in parallel with the help of worker threads. This module bundler parses the assets, sorts out their dependencies, and transforms them into their final compiled form.
#### Key features:
- Comes with out-of-the-box development server
- Has a hot reloading feature
- Vue Hot Reloading API and React Fast Refresh integrations
- Includes in-built diagnostics feature
### 4. Babel
Coming to Babel, is another well-known open-source JavaScript transcompiler. It can convert the ES6+ code into ES5-friendly code, allowing you to use it immediately without browser support. It is a widely used tool for utilizing JavaScript's most recent features.
It can turn ECMAScript 2015+ code into a JavaScript-compatible version accessible by old JavaScript engines. This module bundler can integrate with Gatsby, Grunt, Browserify, RequireJS, and many other tools. You can utilize the npm registry to transform their source code into JavaScript versions that web browsers can understand. In addition, Babel can translate nonstandard JavaScript syntax, like JSX.
#### Key features:
- Plenty of integrations
- Can translate backward-incompatible syntax
- Modern JavaScript
- Easy to use
### 5. Vite
Built by Evan You, Vite is one of the best next-generation front-end tools. It is quicker compared to other module bundlers because it pre-bundles dependencies during development using ESBuild. This module bundler is known for its instant and fast bundling speed. It is quite flexible and utilizes native imports from ES modules.
This tool has a rich out-of-the-box support feature and flexible programmatic APIs.
It comes with a pre-configured Rollup build, and building is not needed. Vite allows the browser to request the imports automatically, so there is no need to pre-process and combine all of a project's modules into one JS file. As a result, it increases the reloading speed. This tool supports various front-end libraries, comes with built-in Typescript, and many more.
#### Key features:
- Comes with a quick Hot Module Replacement (HMR)
- Has library mode and multi-page support
- Lightning fast reloads
- Features numerous universal plugins
### 6. Grunt
Based on NodeJS, Grunt is one of the common JavaScript task runners known for its flexibility. It can automate several tasks, including unit testing, linting, compilation, and minification. This module bundle can integrate with 17 tools, such as TSLint, Babel, KeyCDN, WebStorm, Sails.js, and many more.
Grunt utilizes a command line interface to execute the custom task specified in the file. You can add, edit, and expand custom tasks and it comes with numerous setup options for each task. This tool is compatible with Linux, MacOS, and Windows operating systems.
#### Key features:
- Simple configuration
- Can automate live reload and minification
- Features 4000+ plugins
- Plenty of integrations
### 7. ESBuild
ESBuild is a quick JavaScript bundler that is composed in Golang and allows quick and easy JavaScript bundling. This module bundler is known for its user-friendly features and fast build tool performance. Even though it lacks a built-in development server, you can easily set up a development server.
This module bundler follows a traditional bundling approach, but it is relatively fast compared to other tools. It can be used to connect JavaScript and CSS dependencies swiftly. This tool has an API for Go and JavaScript and supports JSX and TypeScript syntax.
#### Key features:
- ES6 modules tree shaking
- Very quick and do not need a cache
- Multiple plugins
- CommonJS and ES6 modules are supported
### 8. RequireJS
RequireJS is another JavaScript library and file loader that is used to handle dependencies between modular programming and JavaScript files. It offers asynchronous module loading and has the ability to load layered dependencies. RequireJS supports integrations with numerous tools, including JScrambler, Luxon, WebStorm, TurboGears, and Babel.
This tool can compile JavaScript files from many modules and loads several JavaScript files. In addition to that, it can minify and merge components into a single script, making it easy for developers. This module bundler enhances code quality and speed.
#### Key features:
- Loads nested dependencies
- Asynchronous module loading
- Less code complexity
- Simple debugging
### 9. Rollup
Rollup module bundler is a decent Webpack alternative that combines short snippets of code in order to develop a big or complex app or library. This module bundler is famous for its high-end performance and quick speed. It is relatively simple and needs only a little configuration, making it suitable for beginners. With the help of ESM format and the latest ES6 import and export features, you can create future-proof code.
This tool has a tree-shaking feature, automatically eliminating unnecessary code from the last bundle. As a result, it produces files in small sizes and the loading time is relatively quick. You can merge individual functions from the libraries with the help of ES modules. In addition to that, it is possible to use a plugin to bring in the existing CommonJS modules.
#### Key features:
- Easy building of packages and libraries
- ES modules optimization
- Tree shaking feature
- New ES6 JavaScript format
### 10. Npm
Npm or node package manager is a popular JavaScript’s package manager. For the npm ecosystem, the command-line interface is npm. It is incredibly versatile and utilized by JavaScript developers for front-end projects. You can use and share JavaScript modules that are stored in the registry.
Npm offers seamless integrations with about 36 tools, such as Yarn, Stencil, Bitbucket, Apache OpenWhisk, JFrog, Snyk, Travis CI, and many more. It is the built-in package manager for node.js and comprises an online public and private package database along with a command line client. The public package database can be accessed for free, while the private package database is paid.
#### Key features:
- Comes with a CLI (Command Line Client)
- Has 800,000+ code packages
- More than 36 integrations
- Extremely fast
## Conclusion
For web development, module bundlers are relatively important because they offer quick solutions to convert and bundle app code to build static assets. Though Webpack is one of the best module bundlers, it may not be ideal for every developer, so we curated this list of the best Webpack alternatives.
All these module bundlers are top Webpack alternatives in terms of flexibility, speed, and functionality. However, each tool has its own pros and cons, so it is best to try each one out and choose the best module bundler that perfectly aligns with your project requirements.
Read More
https://devopsden.io/article/aws-cloud-migration-checklist
https://dev.to/devops_den/top-cloud-providers-in-2024-fne
Thank You
| devops_den |
1,913,276 | Automate User and Group Management with a Bash Script | Managing users and groups on a Linux system can be a daunting task, especially when you have to... | 0 | 2024-07-06T01:02:40 | https://dev.to/ng2edith/automate-user-and-group-management-with-a-bash-script-2abn | devops, linux, bash, automation |
Managing users and groups on a Linux system can be a daunting task, especially when you have to handle a large number of users. Automation is the key to simplifying these repetitive tasks, ensuring consistency, and reducing the likelihood of errors. In this article, we'll explore a bash script that automates the creation of users and groups, sets up home directories, generates random passwords, and logs all actions.
We'll walk through each step of the script, explaining the rationale behind the code, and provide links to the HNG Internship program, a great opportunity for budding developers to enhance their skills.
**Why Automate User Management?**
Before diving into the script, let's understand why automating user management is beneficial:
1. **Consistency**: Automation ensures that users are created with the same settings, reducing the risk of configuration errors.
2. **Efficiency**: Batch processing user accounts saves time compared to manual entry.
3. **Security**: Automatically setting secure passwords and proper permissions enhances security.
4. **Logging**: Keeping a log of all actions aids in auditing and troubleshooting.
**The Script**
Below is the bash script that performs all the tasks mentioned. It reads a text file containing usernames and group names, creates users and groups, sets up home directories, generates random passwords, and logs actions.
```bash
#!/bin/bash
# Script to create users and groups from a given text file
# Usage: bash create_users.sh <name-of-text-file>
# Example: bash create_users.sh users.txt
# Log file
LOG_FILE="/var/log/user_management.log"
PASSWORD_FILE="/var/secure/user_passwords.txt"
# Check if the input file is provided
if [ $# -ne 1 ]; then
echo "Usage: $0 <name-of-text-file>"
exit 1
fi
INPUT_FILE=$1
# Ensure the log and password files exist
touch $LOG_FILE
mkdir -p /var/secure
touch $PASSWORD_FILE
chmod 600 $PASSWORD_FILE
log_action() {
echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" >> $LOG_FILE
}
create_user() {
local username=$1
local groups=$2
# Create the user's personal group
if ! getent group $username > /dev/null 2>&1; then
groupadd $username
log_action "Created group $username"
else
log_action "Group $username already exists"
fi
# Create user
if ! id -u $username > /dev/null 2>&1; then
useradd -m -g $username -s /bin/bash $username
log_action "Created user $username"
else
log_action "User $username already exists"
return
fi
# Assign additional groups to the user
IFS=',' read -ra group_array <<< "$groups"
for group in "${group_array[@]}"; do
group=$(echo $group | xargs) # Remove leading/trailing whitespaces
if ! getent group $group > /dev/null 2>&1; then
groupadd $group
log_action "Created group $group"
fi
usermod -aG $group $username
log_action "Added user $username to group $group"
done
# Generate a random password for the user
local password=$(openssl rand -base64 12)
echo "$username:$password" | chpasswd
log_action "Set password for user $username"
# Store the password securely
echo "$username,$password" >> $PASSWORD_FILE
}
while IFS=';' read -r username groups; do
username=$(echo $username | xargs) # Remove leading/trailing whitespaces
groups=$(echo $groups | xargs) # Remove leading/trailing whitespaces
create_user $username "$groups"
done < $INPUT_FILE
log_action "User creation script completed"
```
## Breaking Down the Script
### Script Header and Usage
The script starts with a shebang (`#!/bin/bash`), indicating it should be run in a bash shell. A usage message is provided if the script is not run with the correct arguments, ensuring users know how to execute it properly.
```bash
# Check if the input file is provided
if [ $# -ne 1 ]; then
echo "Usage: $0 <name-of-text-file>"
exit 1
fi
```
### Log and Password Files
We define `LOG_FILE` and `PASSWORD_FILE` for logging actions and storing passwords securely. The script ensures these files and directories are created with appropriate permissions.
```bash
# Log file
LOG_FILE="/var/log/user_management.log"
PASSWORD_FILE="/var/secure/user_passwords.txt"
# Ensure the log and password files exist
touch $LOG_FILE
mkdir -p /var/secure
touch $PASSWORD_FILE
chmod 600 $PASSWORD_FILE
```
### Logging Function
The `log_action()` function logs messages with timestamps to the log file, providing a record of actions performed by the script.
```bash
log_action() {
echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" >> $LOG_FILE
}
```
### User Creation Function
The `create_user()` function handles the creation of users and their personal groups. It checks if a group or user already exists and creates them if they don't. It assigns users to additional groups specified in the input file and generates a random password for each user.
```bash
create_user() {
local username=$1
local groups=$2
# Create the user's personal group
if ! getent group $username > /dev/null 2>&1; then
groupadd $username
log_action "Created group $username"
else
log_action "Group $username already exists"
fi
# Create user
if ! id -u $username > /dev/null 2>&1; then
useradd -m -g $username -s /bin/bash $username
log_action "Created user $username"
else
log_action "User $username already exists"
return
fi
# Assign additional groups to the user
IFS=',' read -ra group_array <<< "$groups"
for group in "${group_array[@]}"; do
group=$(echo $group | xargs) # Remove leading/trailing whitespaces
if ! getent group $group > /dev/null 2>&1; then
groupadd $group
log_action "Created group $group"
fi
usermod -aG $group $username
log_action "Added user $username to group $group"
done
# Generate a random password for the user
local password=$(openssl rand -base64 12)
echo "$username:$password" | chpasswd
log_action "Set password for user $username"
# Store the password securely
echo "$username,$password" >> $PASSWORD_FILE
}
```
### Main Loop
The script reads the input file line by line, trims any leading/trailing whitespaces from usernames and groups, and calls `create_user()` for each line in the input file.
```bash
while IFS=';' read -r username groups; do
username=$(echo $username | xargs) # Remove leading/trailing whitespaces
groups=$(echo $groups | xargs) # Remove leading/trailing whitespaces
create_user $username "$groups"
done < $INPUT_FILE
```
### Execution and Logging
After processing the input file, a completion message is logged, indicating the script has finished executing.
```bash
log_action "User creation script completed"
```
**Conclusion**
Automating user and group management with a bash script not only simplifies administrative tasks but also enhances consistency and security. By following this guide, you can efficiently manage user accounts and groups on your system.
For more information on internship opportunities and to learn how you can hire talent from the HNG Internship program, visit the [HNG Internship website](https://hng.tech/internship) and explore how you can [hire top talent](https://hng.tech/hire).
| ng2edith |
1,912,388 | New in PHP 8! 𝐒𝐢𝐦𝐩𝐥𝐢𝐟𝐲 𝐘𝐨𝐮𝐫 𝐂𝐨𝐝𝐞 𝐰𝐢𝐭𝐡 𝐭𝐡𝐞 𝐍𝐮𝐥𝐥𝐬𝐚𝐟𝐞 𝐎𝐩𝐞𝐫𝐚𝐭𝐨𝐫 | The Nullsafe operator, introduced in PHP 8.0, is a game-changer for handling nullable properties and... | 0 | 2024-07-06T00:59:22 | https://dev.to/bentesolution/new-in-php-8-53ig | webdev, php | The Nullsafe operator, introduced in PHP 8.0, is a game-changer for handling nullable properties and method calls more gracefully. It allows you to avoid verbose null checks, making your code cleaner and more readable.
###Example Tradition Null Check
```
$userCountry = null;
if ($user !== null) {
if ($user->getAddress() !== null) {
$userCountry = $user->getAddress()->getCountry();
}
}
```
𝐖𝐡𝐲 𝐔𝐬𝐞 𝐭𝐡𝐞 𝐍𝐮𝐥𝐥𝐬𝐚𝐟𝐞 𝐎𝐩𝐞𝐫𝐚𝐭𝐨𝐫?
✅ 𝐂𝐨𝐧𝐜𝐢𝐬𝐞𝐧𝐞𝐬𝐬: Reduces the amount of boilerplate code required for null checks.
✅ 𝐑𝐞𝐚𝐝𝐚𝐛𝐢𝐥𝐢𝐭𝐲: Makes your code more readable and expressive, clearly showing the intent of handling nullable values.
✅ 𝐒𝐚𝐟𝐞𝐭𝐲: Helps avoid null dereference errors in a more elegant way, ensuring your code handles potential null values seamlessly.
###Nullsafe implementation
```
$userCountry = $user?->getAddress()?->getCountry();
```
Have you started using the Nullsafe operator in your PHP 8 projects? Share your thoughts and experiences!
| bentesolution |
1,913,260 | Guia detalhado sobre Java Modules | Com a chegada do Java 9, a plataforma Java ganhou um novo sistema de módulos, que foi uma das maiores... | 0 | 2024-07-06T00:58:36 | https://dev.to/renatocardosoalves/guia-detalhado-sobre-java-modules-31cn | java | Com a chegada do Java 9, a plataforma Java ganhou um novo sistema de módulos, que foi uma das maiores mudanças desde a introdução das Generics no Java 5. O sistema de módulos, também conhecido como **_Projeto Jigsaw_**, permite dividir a aplicação em módulos distintos com dependências explícitas. Isso melhora a organização, segurança e manutenibilidade do código.
## Introdução aos módulos
Um módulo em Java é uma unidade de agregação de pacotes. Ele encapsula pacotes e recursos e especifica quais deles são acessíveis a outros módulos e quais não são. O sistema de módulos tem como objetivo principal oferecer maior controle sobre a visibilidade de classes e pacotes e ajudar a construir aplicações mais robustas e seguras.
## Definindo um módulo
Para definir um módulo, você precisa criar um arquivo **module-info.java** na raiz do diretório do módulo. Esse arquivo contém as declarações que definem o nome do módulo e as suas dependências.
Exemplo de um **module-info.java** básico:
```
module com.example.myapp {
requires java.sql;
exports com.example.myapp.api;
}
```
Neste exemplo:
- **'module com.example.myapp'** define o nome do módulo
- **'requires java.sql'** declara que este módulo depende do módulo **'java.sql'**.
- **exports com.example.myapp.api** permite que outros módulos acessem os pacotes dentro módulo **'com.example.myapp.api'**
### Estrutura do projeto com módulo
Suponha que temos dois módulos **'com.example.myapp'** e **'com.example.util'**.
A estrutura do projeto seria algo assim:
```
my-modular-project/
├── com.example.myapp/
│ ├── module-info.java
│ └── com/example/myapp/
│ ├── Main.java
│ └── api/
│ └── MyService.java
└── com.example.util/
├── module-info.java
└── com/example/util/
└── Utility.java
```
### Exemplo de implementação
Vamos implementar um exemplo simples onde um módulo com.example.myapp utiliza um serviço fornecido pelo módulo com.example.util.
**com.example.util/module-info.java**
```
module com.example.util {
exports com.example.util;
}
```
**com.example.util/com/example/util/Utility.java**
```
package com.example.util;
public class Utility {
public static String getGreeting() {
return "Hello from Utility!";
}
}
```
**com.example.myapp/module-info.java**
```
module com.example.myapp {
requires com.example.util;
}
```
**com.example.myapp/com/example/myapp/Main.java**
```
package com.example.myapp;
import com.example.util.Utility;
public class Main {
public static void main(String[] args) {
System.out.println(Utility.getGreeting());
}
}
```
### Compilação e execução dos módulos
Para compilar e executar módulos, você pode usar o comando **'javac'** e **'java'** com a opção **'--module-path'** para especificar onde os módulos estão localizados.
**Compilação**
```
javac -d out --module-source-path src $(find src -name "*.java")
```
**Execução**
```
java --module-path out -m com.example.myapp/com.example.myapp.Main
```
### Recursos adicionais
#### Diretrizes de acesso
Você pode usar a diretiva 'opens' para permitir acesso reflexivo a pacotes, por exemplo, para bibliotecas e frameworks como Spring e Hibernate:
```
module com.example.myapp {
requires com.example.util;
opens com.example.myapp.internal to some.framework;
}
```
#### Serviços e provedores
Java Modules também suportam um mecanismo de serviços para facilitar a implementação de padrões de design como Inversão de Controle (IoC).
**Definição de serviço:**
```
module com.example.util {
exports com.example.util;
provides com.example.util.MyService with com.example.util.MyServiceImpl;
}
```
**Uso do serviço:**
```
module com.example.myapp {
requires com.example.util;
uses com.example.util.MyService;
}
```
No código do cliente, você pode obter um instância do serviço usando o **'ServiceLoader'**:
```
ServiceLoader<MyService> serviceLoader = ServiceLoader.load(MyService.class);
MyService service = serviceLoader.findFirst().orElseThrow();
```
## Conclusão
O sistema de módulos em Java oferece uma maneira poderosa e flexível de organizar o código, controlar dependências e melhorar a segurança das aplicações. Ele é especialmente útil para grandes projetos que podem se beneficiar de uma estrutura modularizada. Ao entender e aplicar os conceitos de módulos, você pode construir aplicações Java mais robustas e manuteníveis. | renatocardosoalves |
1,913,271 | Understanding the Basics of Cryptocurrency Mining | Introduction Cryptocurrency mining has become a popular and lucrative activity in recent... | 0 | 2024-07-06T00:32:02 | https://dev.to/kartikmehta8/understanding-the-basics-of-cryptocurrency-mining-498o | javascript, beginners, programming, tutorial | ## Introduction
Cryptocurrency mining has become a popular and lucrative activity in recent years due to the rise of digital currencies like Bitcoin and Ethereum. It is a process of verifying and recording transactions on a decentralized network using powerful computers. In this article, we will delve into the basics of cryptocurrency mining, its advantages, disadvantages, and features.
## Advantages
One of the main advantages of cryptocurrency mining is the potential to earn a significant amount of money. Miners are rewarded with a certain amount of the currency they mine for verifying transactions. In addition, mining also helps to secure the network and prevent fraudulent transactions.
## Disadvantages
Mining is a time-consuming and expensive process, requiring expensive equipment and high electricity consumption. It also contributes to the energy crisis and environmental pollution. Moreover, the constant increase in mining difficulty can make it difficult for individual miners to earn a profit.
## Features
Cryptocurrency mining is a decentralized process, meaning it does not rely on a central authority or bank. It also provides transparency as all transactions are recorded on the blockchain and can be publicly viewed.
### Key Components of a Mining Rig
```plaintext
- GPU (Graphics Processing Unit) or ASIC (Application-Specific Integrated Circuit) miners
- Power supply unit (PSU) with high wattage to support mining operations
- Cooling systems to manage the heat generated by continuous operations
- Mining software specific to the cryptocurrency being mined
```
### Environmental Impact and Solutions
```plaintext
- High energy consumption leading to a larger carbon footprint
- Potential use of renewable energy sources like solar or wind to power mining operations
- Development of more energy-efficient mining hardware
```
## Conclusion
In conclusion, understanding the basics of cryptocurrency mining is crucial for those interested in investing or participating in the crypto world. While it offers many advantages, it is important to consider the disadvantages and the impact it has on the environment. As the crypto market continues to evolve, so will the process of mining. | kartikmehta8 |
1,913,270 | Day 985 : The Thing | liner notes: Professional : Pretty chill day back from the holiday. Responded to some community... | 0 | 2024-07-06T00:14:41 | https://dev.to/dwane/day-985-the-thing-25n2 | hiphop, code, coding, lifelongdev | _liner notes_:
- Professional : Pretty chill day back from the holiday. Responded to some community questions. I forgot to check for something in the sample app I made to test a new functionality. So, I tested it and it still works. Nice! Did some work on another refactor project.
- Personal : Since I had the day off, I decided to try and get some stuff done. I finally finished the logo I've been working on and added it to my site and got it looking how I wanted. I also added a Web Component I made previously to add to my projects' About page. I just needed to figure out how to set up an endpoint to get the information about the project. I just need to fill it out for this particular project. Also put together the starter tracks for the radio show and some other future tracks. Looked at some land and sent an email to the realtor. I also did a small modification to my desk in the van to make it easier to stay in the upright position so I have more room. Ended the night watching an episode of "Demon Slayer".
Going to finish up putting together the radio show for tomorrow. Work on the about page for my side project and remove a project and I'll be able to release it. The thing about the project is that it's meant to be added to over time, so the sooner I drop it, the sooner I can add to it. There's a new episode of "The Boys" and I'll probably also watch "Demon Slayer".
Saturday is the radio at https://kNOwBETTERHIPHOP.com
Sunday is for the study sessions at https://untilit.works
Have a great night and weekend!
peace piece
Dwane / conshus
https://dwane.io / https://HIPHOPandCODE.com
{% youtube VwLYGB8UzP4 %} | dwane |
1,913,269 | Mastering Number Systems: Binary, Decimal, Hexadecimal, and More | In the realm of computer science and mathematics, number systems play a pivotal role in how we... | 0 | 2024-07-06T00:10:55 | https://dev.to/m__mdy__m/understanding-number-systems-binary-decimal-hexadecimal-and-beyond-55i4 | javascript, programming, tutorial, beginners | In the realm of computer science and mathematics, number systems play a pivotal role in how we represent, process, and understand data. While most people are familiar with the decimal system (base-10), which is used in everyday life, other systems like binary (base-2) and hexadecimal (base-16) are essential in computing. This article delves into these systems and explores their significance, conversions, and practical applications.
## Number Systems and Their Conversions
Understanding various number systems and how to convert between them is essential in computing and digital electronics. Let's explore the decimal, binary, hexadecimal, and octal systems, along with step-by-step examples for conversions.
### Decimal (Base-10) System
The decimal system is the most widely used number system. It uses ten symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. Each position in a decimal number represents a power of 10.
**Example:**
Consider the number `456` in decimal.
Calculate its value as:
4 * 10^2 + 5 * 10^1 + 6 * 10^0
= 4 * 100 + 5 * 10 + 6 * 1
= 400 + 50 + 6 = 456
### Binary (Base-2) System
The binary system is fundamental to computer operations. It uses only two symbols: 0 and 1. Each position in a binary number represents a power of 2.
**Example:**
Consider the binary number `1101`.
Calculate its value as:
1 * 2^3 + 1 * 2^2 + 0 * 2^1 + 1 * 2^0
= 1 * 8 + 1 * 4 + 0 * 2 + 1 * 1
= 8 + 4 + 0 + 1 = 13
Binary is used in digital circuits and computing because it aligns perfectly with the on-off states of transistors.
### Binary Coded Decimal (BCD)
To convert decimal digits to binary for easier manipulation in digital systems, Binary Coded Decimal (BCD) is often used. [Learn more about Binary Coded Decimal (BCD)](./Binary%20Coded%20Decimal%20(BCD).md)
## Hexadecimal (Base-16) System
The hexadecimal system is critical in computing for simplifying binary code. It uses sixteen symbols: 0-9 and A-F, where A represents 10, B represents 11, and so on up to F, which represents 15. Each position in a hexadecimal number represents a power of 16.
**Example:**
Consider the hexadecimal number `2F3`.
Calculate its value as:
2 * 16^2 + 15 * 16^1 + 3 * 16^0
= 2 * 256 + 15 * 16 + 3 * 1
= 512 + 240 + 3 = 755
Hexadecimal is preferred in computing because it can represent large binary numbers more compactly. Each hexadecimal digit corresponds to four binary digits (bits).
#### Octal (Base-8) System
The octal system uses eight symbols: 0-7. Each position in an octal number represents a power of 8.
**Example:**
Consider the octal number `745`.
Calculate its value as:
7 * 8^2 + 4 * 8^1 + 5 * 8^0
= 7 * 64 + 4 * 8 + 5 * 1
= 448 + 32 + 5 = 485
Octal was more commonly used in earlier computing systems but has largely been supplanted by hexadecimal due to its more straightforward alignment with binary numbers.
### Fixed-Point Representation
Fixed-point representation is used to represent real numbers in binary where a fixed number of digits represent the integer part and a fixed number of digits represent the fractional part. [Learn more about Fixed-Point Representation](./Fixed-Point%20Representation.md)
### Floating-Point Representation
Floating-point representation is used for a wider range of real numbers. It consists of a significand (or mantissa) and an exponent, allowing for representation of very large or very small numbers. [Learn more about Floating-Point Representation](./Floating-Point-Representation.md)
### Gray Code (Binary Reflected Gray Code)
Gray Code is a binary numeral system where two successive values differ in only one bit. This property is useful in minimizing errors in digital communication and is used in various encoding schemes. [Learn more about Gray Code](./Gray%20Code%20(Binary%20Reflected%20Gray%20Code).md)
#### Why Use Different Bases?
1. **Binary (Base-2):** Essential for digital circuits and logical operations, where data is processed in bits (0s and 1s).
2. **Decimal (Base-10):** Naturally intuitive for human use due to its alignment with our ten fingers, making it ideal for everyday arithmetic.
3. **Hexadecimal (Base-16):** Efficient for representing large binary numbers in a compact form, making it easier to debug and understand machine-level code.
4. **Octal (Base-8):** Historically used in computing due to its simpler conversion from binary, though less common today.
### Signed Magnitude Representation
In signed magnitude representation, the most significant bit (MSB) represents the sign (0 for positive and 1 for negative), and the remaining bits represent the magnitude of the number. [Learn more about Signed Magnitude Representation](./Signed%20Magnitude%20Representation.md)
### Two's Complement Representation
Two's complement representation is widely used for signed integers in computing. It simplifies the design of arithmetic circuits and allows for straightforward binary addition and subtraction. [Learn more about Two's Complement Representation](./Two's_Complement_Representation.md)
## Conversions Between Bases
### Binary to Decimal
To convert a binary number to a decimal:
1. Write down the binary number.
2. Multiply each bit by 2 raised to the power of its position index, starting from 0 on the right.
3. Sum all the products.
**Example:**
Convert binary `1011` to decimal.
1011_2 = 1 * 2^3 + 0 * 2^2 + 1 * 2^1 + 1 * 2^0
= 1 * 8 + 0 * 4 + 1 * 2 + 1 * 1
= 8 + 0 + 2 + 1 = 11
### Decimal to Binary
To convert a decimal number to binary:
1. Divide the number by 2.
2. Record the remainder.
3. Update the number to the quotient from the division.
4. Repeat steps 1-3 until the quotient is 0.
5. The binary representation is the sequence of remainders read from bottom to top.
**Example:**
Convert decimal `13` to binary.
> I couldn't find the division sign so I used %
13 % 2 = 6 remainder 1
6 % 2 = 3 remainder 0
3 % 2 = 1 remainder 1
1 % 2 = 0 remainder 1
Reading the remainders from bottom to top, `13` in decimal is `1101` in binary.
### Hexadecimal to Decimal
To convert a hexadecimal number to a decimal:
1. Write down the hexadecimal number.
2. Multiply each digit by 16 raised to the power of its position index, starting from 0 on the right.
3. Sum all the products.
**Example:**
Convert hexadecimal `1A3` to decimal.
1A3_{16} = 1 * 16^2 + A * 16^1 + 3 * 16^0
(A in hexadecimal is 10 in decimal)
= 1 * 256 + 10 * 16 + 3 * 1
= 256 + 160 + 3 = 419
### Decimal to Hexadecimal
To convert a decimal number to hexadecimal:
1. Divide the number by 16.
2. Record the remainder (convert to hexadecimal if greater than 9).
3. Update the number to the quotient from the division.
4. Repeat steps 1-3 until the quotient is 0.
5. The hexadecimal representation is the sequence of remainders read from bottom to top.
**Example:**
Convert decimal `419` to hexadecimal.
> I couldn't find the division sign so I used %
419 % 16 = 26 remainder 3
26 % 16 = 1 remainder 10 \text{ (A in hexadecimal)}
1 % 16 = 0 remainder 1
Reading the remainders from bottom to top, `419` in decimal is `1A3` in hexadecimal.
### Binary to Hexadecimal
To convert a binary number to hexadecimal:
1. Group the binary digits into sets of four, starting from the right. Add leading zeros if necessary.
2. Convert each group of four bits to its hexadecimal equivalent.
**Example:**
Convert binary `11010110` to hexadecimal.
Group the binary digits into sets of four:
1101 0110
Convert each group:
1101_2 = D_{16} (13 \text{ in decimal})
0110_2 = 6_{16}
So, `11010110` in binary is `D6` in hexadecimal.
### Hexadecimal to Binary
To convert a hexadecimal number to binary:
1. Convert each hexadecimal digit to its four-bit binary equivalent.
**Example:**
Convert hexadecimal `D6` to binary.
Convert each digit:
D_{16} = 1101_2 (13 \text{ in decimal})
6_{16} = 0110_2
So, `D6` in hexadecimal is `11010110` in binary.
### Octal to Decimal
To convert an octal number to a decimal:
1. Write down the octal number.
2. Multiply each digit by 8 raised to the power of its position index, starting from 0 on the right.
3. Sum all the products.
**Example:**
Convert octal `745` to decimal.
745_{8} = 7 * 8^2 + 4 * 8^1 + 5 * 8^0
= 7 * 64 + 4 * 8 + 5 * 1
= 448 + 32 + 5 = 485
### Decimal to Octal
To convert a decimal number to octal:
1. Divide the number by 8.
2. Record the remainder.
3. Update the number to the quotient from the division.
4. Repeat steps 1-3 until the quotient is 0.
5. The octal representation is the sequence of remainders read from bottom to top.
**Example:**
Convert decimal `485` to octal.
> I couldn't find the division sign so I used %
485 % 8 = 60 remainder 5
60 % 8 = 7 remainder 4
7 % 8 = 0 remainder 7
Reading the remainders from bottom to top, `485` in decimal is `745` in octal.
### Binary to Octal
To convert a binary number to octal:
1. Group the binary digits into sets of three, starting from the right. Add leading zeros if necessary.
2. Convert each group of three bits to its octal equivalent.
**Example:
**
Convert binary `11010110` to octal.
Group the binary digits into sets of three:
11 010 110
Add leading zeros if necessary:
011 010 110
Convert each group:
011_2 = 3_{8}
010_2 = 2_{8}
110_2 = 6_{8}
So, `11010110` in binary is `326` in octal.
### Octal to Binary
To convert an octal number to binary:
1. Convert each octal digit to its three-bit binary equivalent.
**Example:**
Convert octal `326` to binary.
Convert each digit:
3_{8} = 011_2
2_{8} = 010_2
6_{8} = 110_2
So, `326` in octal is `011010110` in binary. (Removing leading zeroes if not necessary)
These detailed explanations and examples cover the fundamental number systems and their conversions, essential for various applications in computing and digital electronics.
### Practical Applications
1. **Memory Addresses:** Hexadecimal is used to represent memory addresses in a readable format.
2. **Color Codes:** Hexadecimal values are used in web design to represent RGB color values.
3. **Assembly Language:** Low-level programming often uses hexadecimal to simplify binary code representation.
4. **Networking:** IP addresses and MAC addresses can be represented in hexadecimal for brevity.
## Converting Text and Numbers to Various Bases
Converting text, words, letters, or other non-numeric data into various number systems is a common practice in computing for tasks such as encryption, data encoding, and more. Here’s how to convert text and other non-numeric data into binary, hexadecimal, and other bases step-by-step.
### Converting Text to Binary
To convert text to binary:
1. Take each character in the text.
2. Find the ASCII value of each character.
3. Convert the ASCII value to binary.
**Example:**
Convert the word "Hi" to binary.
1. Find the ASCII values:
- H: 72
- i: 105
2. Convert each ASCII value to binary:
- 72 in binary: `01001000`
- 105 in binary: `01101001`
3. Concatenate the binary values:
- "Hi" in binary: `01001000 01101001`
### Converting Text to Hexadecimal
To convert text to hexadecimal:
1. Take each character in the text.
2. Find the ASCII value of each character.
3. Convert the ASCII value to hexadecimal.
**Example:**
Convert the word "Hi" to hexadecimal.
1. Find the ASCII values:
- H: 72
- i: 105
2. Convert each ASCII value to hexadecimal:
- 72 in hexadecimal: `48`
- 105 in hexadecimal: `69`
3. Concatenate the hexadecimal values:
- "Hi" in hexadecimal: `48 69`
### Converting Numbers to Text (Base64 Encoding)
Base64 is a popular encoding scheme used to represent binary data in an ASCII string format. It's commonly used in email and web data.
To convert text to Base64:
1. Convert each character to its ASCII value.
2. Convert the ASCII values to binary.
3. Group the binary digits into sets of 6 bits.
4. Convert each 6-bit group to its corresponding Base64 character.
**Example:**
Convert the word "Hi" to Base64.
1. Find the ASCII values:
- H: 72
- i: 105
2. Convert each ASCII value to binary:
- 72 in binary: `01001000`
- 105 in binary: `01101001`
3. Concatenate the binary values and group into 6 bits:
- `01001000 01101001` becomes `010010 000110 1001`
4. Convert each 6-bit group to Base64:
- `010010` -> `S`
- `000110` -> `G`
- `1001` -> `k`
5. Pad with `=` to make it a multiple of 4 characters:
- "Hi" in Base64: `SGk=`
### Converting Hexadecimal to Text
To convert hexadecimal back to text:
1. Take each hexadecimal pair.
2. Convert the pair to its decimal (ASCII) value.
3. Convert the ASCII value to its corresponding character.
**Example:**
Convert hexadecimal `4869` to text.
1. Split into pairs:
- `48` and `69`
2. Convert each pair to decimal:
- `48` in decimal: 72
- `69` in decimal: 105
3. Convert ASCII values to characters:
- 72: H
- 105: i
4. Concatenate the characters:
- `4869` in hexadecimal is "Hi"
### Converting Text to Octal
To convert text to octal:
1. Take each character in the text.
2. Find the ASCII value of each character.
3. Convert the ASCII value to octal.
**Example:**
Convert the word "Hi" to octal.
1. Find the ASCII values:
- H: 72
- i: 105
2. Convert each ASCII value to octal:
- 72 in octal: `110`
- 105 in octal: `151`
3. Concatenate the octal values:
- "Hi" in octal: `110 151`
### Converting Octal to Text
To convert octal back to text:
1. Take each octal group.
2. Convert the group to its decimal (ASCII) value.
3. Convert the ASCII value to its corresponding character.
**Example:**
Convert octal `110 151` to text.
1. Split into groups:
- `110` and `151`
2. Convert each group to decimal:
- `110` in decimal: 72
- `151` in decimal: 105
3. Convert ASCII values to characters:
- 72: H
- 105: i
4. Concatenate the characters:
- `110 151` in octal is "Hi"
## Additional Examples
### Converting Number 255 to Binary, Hexadecimal, and Octal
**Decimal to Binary:**
Convert `255` to binary:
1. Divide by 2, record the remainder, and continue with the quotient.
> I couldn't find the division sign so I used %
255 % 2 = 127 remainder 1
127 % 2 = 63 remainder 1
63 % 2 = 31 remainder 1
31 % 2 = 15 remainder 1
15 % 2 = 7 remainder 1
7 % 2 = 3 remainder 1
3 % 2 = 1 remainder 1
1 % 2 = 0 remainder 1
Read remainders bottom to top: `255` in binary is `11111111`.
**Decimal to Hexadecimal:**
Convert `255` to hexadecimal:
1. Divide by 16, record the remainder, and continue with the quotient.
> I couldn't find the division sign so I used %
255 % 16 = 15 remainder 15 (F)
15 % 16 = 0 remainder 15 (F)
Read remainders bottom to top: `255` in hexadecimal is `FF`.
**Decimal to Octal:**
Convert `255` to octal:
1. Divide by 8, record the remainder, and continue with the quotient.
> I couldn't find the division sign so I used %
255 % 8 = 31 remainder 7
31 % 8 = 3 remainder 7
3 % 8 = 0 remainder 3
Read remainders bottom to top: `255` in octal is `377`.
### IEEE 754 Standard for Floating-Point Arithmetic
The IEEE 754 standard defines representation and operations for floating-point arithmetic in computers, ensuring consistency and accuracy across different computing systems. [Learn more about IEEE 754 Standard](./IEEE%20754%20Standard%20for%20Floating-Point%20Arithmetic.md)
### Error and Precision Issues in Floating-Point Arithmetic
Floating-point arithmetic can introduce errors due to the finite precision available for representing real numbers. These errors can accumulate in calculations, leading to significant inaccuracies. [Learn more about Error and Precision Issues in Floating-Point Arithmetic](./Error%20and%20Precision%20Issues%20in%20Floating-Point%20Arithmetic.md)
## Conclusion
Understanding different number systems is fundamental in computer science and mathematics. Binary, decimal, and hexadecimal systems each have unique advantages and applications, making them indispensable tools for engineers, programmers, and mathematicians. Mastering these systems enhances one's ability to work efficiently with digital systems and data representation.
## Explore the World of Algorithms and Data Structures
Are you eager to embark on a journey through the fascinating realm of algorithms and data structures? Dive into my GitHub repository, **[Algorithms & Data Structures](https://github.com/m-mdy-m/algorithms-data-structures)**, where a treasure trove of knowledge awaits.
**Experiment, Practice, and Master:**
* **Discover:** Immerse yourself in a diverse collection of algorithms and data structures. Each exploration presents an opportunity to practice, solidify your knowledge, and refine your skills.
* **Continuous Growth:** The repository is dynamic and expanding. While some sections are actively under development as part of my ongoing learning journey (anticipated completion: 2-3 years), new content is continuously added.
**Join Our Learning Community:**
The pursuit of knowledge thrives on interaction and collaboration. Whether you're seeking guidance, have suggestions for improvement, or simply want to discuss algorithms and performance optimization, your participation is valued!
* **Engage with Us:**
* **Twitter:** Follow me [@m__mdy__m](https://twitter.com/m__mdy__m) for updates and insights.
* **Telegram:** **Join the discussion on my channel:** [https://t.me/medishn](https://t.me/medishn) (Preferred for real-time conversations)
* **GitHub:** Explore and contribute on [m-mdy-m](https://github.com/m-mdy-m).
**Together, let's cultivate a vibrant learning community where knowledge flows freely and we collectively advance our understanding of algorithms and data structures.** | m__mdy__m |