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Example NFS configuration between Mac (Host) and Ubuntu VM (Client)

Configure the nfs export configuration in this file for Mac with this value: #file:...

https://dev.to/mss/example-nfs-configuration-between-mac-host-and-ubuntu-vm-client-2hag

Configure the nfs export configuration in this file for Mac with this value: ``` #file: /etc/exports /<path-to-share> -mapall=501:20 192.168.1.2 192.168.1.3 192.168.1.4 ``` 501 should be your default user id in your Mac and 20 should be default group id (staff) in your Mac. The ip should be list of allowed ip to access the NFS. Configure the nfs mount configuration in this file for Ubuntu with this value: ``` #file: /etc/fstab <host-ip>:/<path-to-share> /<path-to-mount> nfs rw,tcp,nolock,noacl,async 0 0 ``` Make sure you have created a directory for /<path-to-mount>.

mss

5 ways to write “natural” code everybody will love to read

Writing code that is both functional and easy to read is essential for maintainability and...

https://dev.to/safdarali/5-ways-to-write-natural-code-everybody-will-love-to-read-5d19

codingbestpractices, webdev, cleancode, programming

Writing code that is both functional and easy to read is essential for maintainability and collaboration. Here are five ways to achieve this: ## 1. Use Parts-of-Speech Naming Your code should read like a well-crafted story, where every element has a clear, descriptive name. Use nouns for entities like variables, properties, classes, and modules. **Bad Example:** ``` let x = 10; function calc(a, b) { return a + b; } ``` **Good Example:** ``` let userCount = 10; function calculateTotal(a, b) { return a + b; } ``` ## 2. Keep Functions Small and Focused Each function should perform a single task and do it well. This makes your code modular, easier to test, and more understandable. **Bad Example:** ``` function handleUserProfile(data) { // Fetch user // Validate user data // Update user profile // Send confirmation email } ``` **Good Example:** ``` function fetchUser(id) { /*...*/ } function validateUserData(data) { /*...*/ } function updateUserProfile(user) { /*...*/ } function sendConfirmationEmail(user) { /*...*/ } ``` ## 3. Consistent Naming Conventions Use consistent naming conventions throughout your codebase. This helps in reducing cognitive load and makes the code more predictable. **Bad Example:** ``` let user_count = 10; function CalcTotal(a, b) { /*...*/ } ``` **Good Example:** ``` let userCount = 10; function calculateTotal(a, b) { /*...*/ } ``` ## 4. Avoid Deep Nesting Deep nesting makes code hard to read and maintain. Use early returns to handle error conditions and simplify control flow. **Bad Example:** ``` function processUser(user) { if (user) { if (user.isActive) { // Process active user } } } ``` **Good Example:** ``` function processUser(user) { if (!user) return; if (!user.isActive) return; // Process active user } ``` ## 5. Comment Wisely Comments should explain why something is done, not what is done. Write comments to provide context and reasoning. **Bad Example:** ``` let userCount = 10; // Set userCount to 10 ``` **Good Example:** ``` let userCount = 10; // Initial user count for new session ``` ## Conclusion Writing natural code means making it readable, maintainable, and expressive. By using descriptive naming, keeping functions focused, maintaining consistency, avoiding deep nesting, and commenting wisely, you can make your code enjoyable to read and easy to work with. Embrace these practices, and your future self (and teammates) will thank you! That's all for today. And also, share your favourite web dev resources to help the beginners here! Connect with me:@ [LinkedIn ](https://www.linkedin.com/in/safdarali25/)and checkout my [Portfolio](https://safdarali.vercel.app/). Explore my [YouTube ](https://www.youtube.com/@safdarali_?sub_confirmation=1)Channel! If you find it useful. Please give my [GitHub ](https://github.com/Safdar-Ali-India) Projects a star ⭐️ Thanks for 24821! 🤗

safdarali

Install Flutter SDK, Android SDK, and Start Android Emulator in WSL

In today’s rapidly evolving tech landscape, mobile app development has become a crucial skill for...

https://dev.to/design_dev_4494d7953431b6/install-flutter-sdk-android-sdk-and-start-android-emulator-in-wsl-1mhi

flutter, linux, android, vscode

In today’s rapidly evolving tech landscape, mobile app development has become a crucial skill for developers. Flutter, Google’s open-source UI software development toolkit, has gained immense popularity for its ability to create natively compiled applications for mobile, web, and desktop from a single codebase. This guide aims to walk you through the comprehensive process of setting up the Flutter SDK, installing the Android SDK using command line tools, and running an Android emulator on your system. Whether you are a beginner or an experienced developer, this step-by-step tutorial will help you get started with Flutter development in no time. ## 1. Verify Required Tools Ensure the following tools are installed: `which bash file mkdir rm which` Expected output: ``` /bin/bash /usr/bin/file /bin/mkdir /bin/rm which: shell built-in command ``` ## 2. Installed Required Packages Update and install necessary packages: ``` sudo apt-get update -y && sudo apt-get upgrade -y sudo apt-get install -y curl git unzip xz-utils zip libglu1-mesa ``` ## 3. Install Flutter in VS Code 1. Launch VS Code. 2. Open the Command Palette: Control + Shift + P. 3. Type flutter. 4. Select Flutter: New Project. 5. VS Code will prompt you to locate the Flutter SDK. - If you have the Flutter SDK installed, click Locate SDK. - If not, click Download SDK. ## 4. Download Command Line Tools 1. Create necessary directories and download the tools: ``` mkdir -p ~/Android/Sdk/cmdline-tools cd ~/Android/Sdk/cmdline-tools wget https://dl.google.com/android/repository/commandlinetools-linux-7302050_latest.zip unzip commandlinetools-linux-7302050_latest.zip mv cmdline-tools latest ``` ## 5. Set Up Environment Variables - Open your profile file (e.g., .bashrc or .zshrc): `nano ~/.bashrc` - Add the following lines: ``` export ANDROID_HOME=$HOME/Android/Sdk export PATH=$ANDROID_HOME/cmdline-tools/latest/bin:$PATH export PATH=$ANDROID_HOME/platform-tools:$PATH export PATH=$ANDROID_HOME/emulator:$PATH ``` - Apply the changes: `source ~/.bashrc` ## 6. Install Java - Install OpenJDK 17: `sudo apt install openjdk-17-jdk` - Determine the Java installation path: `sudo update-alternatives --config java` - Set JAVA_HOME and update PATH: `nano ~/.bashrc` - Add the following lines: ``` export JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64 export PATH=$JAVA_HOME/bin:$PATH ``` - Apply the changes: `source ~/.bashrc` - Verify Java installation: `java -version` ## 7. Install Android SDK Packages 1. Navigate to the command line tools directory: `cd ~/Android/Sdk/cmdline-tools/latest/bin` 2. Install required SDK packages: `./sdkmanager --install "platform-tools" "platforms;android-30" "build-tools;30.0.3" "emulator" "system-images;android-30;google_apis;x86_64" ` 3. Accept Licenses: `./sdkmanager --licenses` ## 8. Create and Start an AVD 1. Create and AVD: `avdmanager create avd -n my_avd -k "system-images;android-30;google_apis;x86_64" --device "pixel"` 2. Start the emulator: `cd ~/Android/Sdk/emulator ./emulator -avd my_avd` --- ## Troubleshooting **Error: libpulse.so.0 not found** `sudo apt install libpulse0` **KVM permission error** `sudo chown username /dev/kvm` --- ## Running Android Emulator in VS Code 1. Run Emulator from Command Line: `cd ~/Android/Sdk/emulator ./emulator -avd my_avd` 2. Select Device in VS Code: - Open Command Palette: Ctrl + Shift + P - Select Flutter: Select Device - Choose your running emulator from the list These steps should help you set up Flutter and the Android SDK, create and start an Android emulator, and integrate it with VS Code. --- Setting up a Flutter development environment can seem daunting at first, but with the right tools and a systematic approach, it becomes a straightforward process. By following this guide, you have equipped yourself with the knowledge to install the Flutter SDK, configure the Android SDK, and run an Android emulator on WSL. This powerful setup will enable you to develop, test, and deploy high-quality mobile applications efficiently. As you continue your journey in mobile app development, remember that the community and resources available are vast and supportive. Happy coding! Reference: Start building Flutter Android apps on Linux (https://docs.flutter.dev/get-started/install/linux/android)

design_dev_4494d7953431b6

I was sick of wasting hours on translations, so I made an AI do it for me

Ever spent a whole day copying and pasting strings into Google Translate for your Laravel app? Yeah,...

https://dev.to/kargnas/i-just-made-an-automatic-translator-for-your-language-files-into-many-languages-using-ai-such-as-claude-3cjp

laravel, php, ai, i18n

Ever spent a whole day copying and pasting strings into Google Translate for your Laravel app? Yeah, me too. It sucked. So I built Laravel AI Translator. It uses Anthropic's Claude AI to automatically translate your PHP lang files. And it's not just dumb word-for-word translation - it actually understands context, keeps your variables intact, and maintains the right tenses. I've been using it for a few weeks now, and it's saved me days of mind-numbing work. Thought some of you might find it useful too. It's open source, so feel free to check it out, use it, break it, whatever. If you've got ideas on how to make it better, I'm all ears. https://github.com/kargnas/laravel-ai-translator P.S. If anyone's curious about how I integrated Claude AI or has questions about the implementation, I'm happy to chat about it.

kargnas

I've been exploring different Australian...

So, I've been exploring different Australian online casinos lately, and let me tell you, the perks...

https://dev.to/tomas_cooker_91bbc02dabe2/ive-been-exploring-different-australian-ga3

australian, online, play

So, I've been exploring different Australian online casinos lately, and let me tell you, the perks are incredible. Besides the usual games, some sites offer loyalty programs that give you points just for playing – and you can redeem them for cash or bonuses later on. It's like getting rewarded for having fun! Plus, the mobile experience is top-notch. I can play my favorite games on the go without any glitches. If you're looking for a great time and some sweet rewards, definitely give these [https://play-au-casino.com/](https://play-au-casino.com/) sites a shot.

tomas_cooker_91bbc02dabe2

10 Vital .NET 🎯Collections

In the world of .NET development, managing and manipulating data efficiently is crucial. Collections...

https://dev.to/shahed1bd/10-vital-net-collections-535k

In the world of .NET development, managing and manipulating data efficiently is crucial. Collections are essential tools that help developers store, retrieve, and organize data. From handling simple lists of items to managing complex sets of key-value pairs, .NET collections offer a wide range of functionalities to meet various needs.  In this blog, we’ll explore ten vital .NET collections that every developer should know. Whether you’re dealing with large datasets, ensuring thread safety, or requiring fast lookups, these collections will provide you with the necessary tools to optimize your code and enhance performance. Let’s dive into the features and use cases of these indispensable .NET collections. Here are ten vital .NET collections that are frequently used in .NET development: #1 List<T> Description: Represents a strongly typed list of objects that can be accessed by index. Use Case: When you need a resizable array.  #2 Dictionary<TKey, TValue> Description: Represents a collection of key/value pairs that are organized based on the key. Use Case: When you need to quickly look up values based on a key.  #3 HashSet<T> Description: Represents a collection of unique elements. Use Case: When you need to prevent duplicate elements and need fast look-up.  #4 Queue<T> Description: Represents a first-in, first-out (FIFO) collection of objects. Use Case: When you need to process items in the order they were added.  #5 Stack<T> Description: Represents a last-in, first-out (LIFO) collection of objects. Use Case: When you need to reverse the order of items or undo operations.  #6 SortedList<TKey, TValue> Description: Represents a collection of key/value pairs that are sorted by the keys. Use Case: When you need a sorted collection that provides fast lookups.  #7 SortedDictionary<TKey, TValue> Description: Represents a collection of key/value pairs that are sorted on the key. Use Case: When you need a sorted collection with better performance for insertion and deletion compared to SortedList.  #8 LinkedList<T> Description: Represents a doubly linked list. Use Case: When you need to efficiently insert or remove elements at both ends of the collection.  #9 ObservableCollection<T> Description: Represents a dynamic data collection that provides notifications when items get added, removed, or when the whole list is refreshed. Use Case: When you need to create collections that update the UI automatically in WPF or other UI frameworks.  #10 ConcurrentDictionary<TKey, TValue> Description: Represents a thread-safe collection of key/value pairs. Use Case: When you need a dictionary that can be safely accessed by multiple threads concurrently.  Understanding and effectively utilizing the right collections can significantly improve your .NET applications’ performance and maintainability. From the simplicity and flexibility of List<T> to the thread safety of ConcurrentDictionary<TKey, TValue>, each collection offers unique advantages for different scenarios. By mastering these ten vital .NET collections, you can handle data more efficiently, write cleaner code, and create more robust applications. Whether you're managing large datasets, requiring unique elements, or ensuring high-speed lookups, these collections will equip you with the tools needed to tackle any data-related challenge in .NET development. Happy Coding! [👋 .NET Application Collections](https://1.envato.market/7mA73y) [🚀 My Youtube Channel](https://www.youtube.com/@DotNetTech) [💻 Github](https://github.com/shahedbd)

shahed1bd

Best Software Developer to Hire

Explore the best software developer to hire at TalentOnLease. Take advantage of having world-class...

https://dev.to/talentonlease01/best-software-developer-to-hire-2o5h

softwaredevelopment, software

Explore the best **[software developer to hire](https://talentonlease.com/hire-software-developer)** at TalentOnLease. Take advantage of having world-class software development professionals all under one roof. Choose the best competencies to meet your specific business requirements. You get simplified communication, smooth integration, and extensive knowledge of frontend and backend technologies when you work with TalentOnLease. Gain from more rapid development cycles and affordable, project-specific solutions. Know the effect of specialized software solutions that improve your visibility in the marketplace. Use TalentOnLease to find the top software developer to help you realize your idea.

talentonlease01

CSS Rotate Property Explained

Understanding the CSS Rotate Property: The rotate property is part of the CSS transform module, which...

https://dev.to/code_passion/css-rotate-property-explained-1j48

webdev, css, html, javascript

**Understanding the CSS Rotate Property:** [The rotate property](https://skillivo.in/css-rotate-property-explained-5/) is part of the CSS transform module, which allows developers to apply different transformations to elements on a webpage. The rotate function allows you to rotate items by a specified angle, changing their orientation but not their location in the document flow. This characteristic provides tremendous versatility by permitting rotations in both clockwise and anticlockwise orientations. **Syntax and Usage:** The CSS rotate property’s syntax is rather easy. Developers define the desired rotation angle within the brackets of the rotate function, as follows: ``` .rotate { transform: rotate(45deg); } ``` In this example, the .rotate class rotates the target element 45 degrees clockwise. It is important to note that angles can be written in a variety of units, including degrees (deg), radians (rad), and gradians (grad), giving developers the freedom to select the most appropriate unit for their needs. ([read more example of css rotate property](https://skillivo.in/css-rotate-property-explained-5/)) **Practical example-** **Animated flip card using using CSS Transform property** output-  **HTML:** ``` <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Animated Flip Card</title> </head> <body> <div class="card-container"> <div class="card" id="card" onclick="togglebuton();"> <div class="front" style="background-color: #ee3646; color: #fff;"> <h2>Front</h2> </div> <div class="back" style="background-color: #353535; color: #fff;"> <h2>Back</h2> </div> </div> </div></body> </html> ``` **CSS:** ``` .card-container { perspective: 1000px; } .card { width: 200px; height: 200px; position: relative; transform-style: preserve-3d; transition: transform 0.6s; } .card.flip { transform: rotateY(180deg); } .card .front, .card .back { width: 100%; height: 100%; position: absolute; backface-visibility: hidden; } .card .back { transform: rotateY(180deg) translateZ(1px); } ``` This code creates a simple CSS-based card flip animation. Let’s take it step by step: 1. .card-container: This class is assigned to the container element that contains the cards. The perspective attribute specifies the depth of the 3D space in which the cards are rendered. A greater value produces more noticeable 3D effects. 2. .card: This class corresponds to each individual card. Its width and height are fixed at 200 pixels, and its position is set to relative. The transform-style: preserve-3d feature ensures that the card’s child elements maintain their 3D positioning when transformed. 3. .card.flip: This class is added to a card when it is required to be flipped. It performs the transformation using rotateY(180deg), which rotates the card 180 degrees around the Y-axis, effectively flipping it over. The transform attribute provides the transition’s duration (0.6 seconds) and ease. 4. .card .front, .card .back: These classes represent the card’s front and back faces, respectively. They are perfectly positioned within the card element, occupying its complete width and height. The backface-visibility: hidden feature ensures that the back face is not visible when the card is facing forward. 5. .card .back: This seminar focuses solely on the card’s back face. It is initially rotated 180 degrees along the Y-axis and translated by one pixel along the Z-axis. This translation is required to avoid potential flickering or z-fighting issues caused by the back face being exactly behind the front face. **Javascript:** ``` function togglebuton(){ document.getElementById("card").classList.toggle('flip'); } ``` document.getElementById – to select the HTML element with the ID card. The document object represents the webpage, and getElementById is a method that retrieves an element by its ID attribute. .classList.toggle(‘flip’); :- This part uses the classList property of the selected element, which provides methods to manipulate the classes of the element. The toggle method is called with the argument ‘flip’. This method adds the class ‘flip’ to the element if it is not already present, and removes it if it is present. **Conclusion** [The CSS rotate feature](https://skillivo.in/css-rotate-property-explained-5/) is a versatile and effective tool for applying rotation effects to web items. Understanding how to use this attribute effectively, whether you’re generating simple rotations or complicated animations, may improve the visual attractiveness and interaction of your online applications significantly. Experiment with different angles, transitions, and combinations to unlock the full power of the rotate feature in your designs.

code_passion

Salesforce Developer Outsourcing: A Comprehensive Guide

Introduction Salesforce is one of the leading Customer Relationship Management (CRM)...

https://dev.to/bytesfarms/salesforce-developer-outsourcing-a-comprehensive-guide-4gne

## Introduction Salesforce is one of the leading Customer Relationship Management (CRM) platforms, widely adopted by businesses to streamline their sales, marketing, and customer service processes. However, leveraging its full potential often requires specialized skills. This is where Salesforce developer outsourcing comes into play. This guide will help you understand the benefits, process, and best practices for outsourcing Salesforce development. ## What is Salesforce Developer Outsourcing? Salesforce developer outsourcing involves hiring external professionals or teams to handle Salesforce-related tasks, such as customization, integration, app development, and maintenance. This approach allows businesses to access expert talent without the overhead costs associated with hiring full-time, in-house developers. ## Benefits of Outsourcing Salesforce Development ### 1. Cost Efficiency Outsourcing can be significantly more cost-effective than maintaining an in-house team, especially when considering recruitment, training, salaries, and benefits. ### 2. Access to Expertise Outsourcing provides access to a global talent pool of experienced Salesforce developers who possess the latest skills and certifications. ### 3. Scalability Outsourced teams can be easily scaled up or down based on project requirements, offering flexibility to meet changing business needs. ### 4. Focus on Core Business By outsourcing Salesforce development, businesses can focus on their core competencies, leaving the technical complexities to experts. ### 5. Faster Time-to-Market Experienced outsourcing partners can expedite the development process, ensuring quicker implementation of Salesforce solutions. ## The Outsourcing Process ### 1. Define Your Requirements Clearly outline your business goals, project scope, and specific Salesforce needs. This includes identifying the features you want to implement, the level of customization required, and the expected timeline. ### 2. Choose the Right Outsourcing Model There are several outsourcing models to consider: Project-Based Outsourcing: Ideal for one-time projects with a clear scope and timeline. Dedicated Team: Suitable for long-term projects requiring continuous development and maintenance. Staff Augmentation: Allows you to add skilled Salesforce developers to your existing team on a temporary basis. ### 3. Select an Outsourcing Partner Evaluate potential partners based on their experience, expertise, client reviews, and portfolio. Ensure they have a proven track record in Salesforce development and understand your industry. ### 4. Establish Communication Channels Effective communication is crucial for successful outsourcing. Set up regular meetings, progress reports, and use project management tools to ensure smooth collaboration. ### 5. Sign a Contract Draft a comprehensive contract outlining the scope of work, timelines, payment terms, confidentiality agreements, and any other important details. This protects both parties and sets clear expectations. ### 6. Onboard the Team Introduce the outsourced team to your internal stakeholders, systems, and processes. Provide them with all necessary access and documentation to start the project. ### 7. Monitor Progress Regularly review the project’s progress against milestones and deadlines. Provide feedback and address any issues promptly to keep the project on track. ### 8. Quality Assurance Ensure thorough testing of the developed solutions to meet your quality standards. This includes functional, integration, and user acceptance testing. ### 9. Deployment and Training Once the solution is ready, deploy it to the live environment. Provide training to your staff to ensure they can effectively use the new Salesforce features. ### 10. Ongoing Support Establish a plan for ongoing support and maintenance. This ensures the solution remains up-to-date and performs optimally. ## Best Practices for Successful Salesforce Developer Outsourcing ## 1. Clear Communication Maintain open and transparent communication with your outsourcing partner. Clearly convey your requirements, expectations, and any changes throughout the project. ## 2. Regular Updates Schedule regular updates and review meetings to monitor progress, address issues, and make necessary adjustments. ## 3. Define Metrics and KPIs Establish key performance indicators (KPIs) to measure the success of the outsourcing engagement. This can include project completion rates, quality of work, and time-to-market. ## 4. Emphasize Security Ensure that your outsourcing partner follows best practices for data security and compliance. This is especially important when dealing with sensitive customer information. ## 5. Foster Collaboration Encourage a collaborative approach between your internal team and the outsourced developers. This fosters a sense of ownership and ensures better alignment with your business objectives. ## Conclusion Outsourcing Salesforce development can be a strategic move for businesses looking to leverage the platform’s full potential without the associated overhead costs. By following a structured process and best practices, you can ensure a successful outsourcing engagement that delivers high-quality results. Whether you need to implement new features, customize existing ones, or integrate Salesforce with other systems, outsourcing provides the expertise and flexibility to meet your business needs. **Read More: [Why Outsource Salesforce Implementation Services](https://bytesfarms.com/why-outsource-salesforce-implementation-services/)**

bytesfarms

Navigating the Workday Releases: 5 Essentials to Embrace

It’s critical to keep ahead of the curve in the dynamic world of enterprise software. Leading...

https://mystorieslist.com/navigating-the-workday-releases-5-essentials-to-embrace/

workday, release

 It’s critical to keep ahead of the curve in the dynamic world of enterprise software. Leading Cloud-based ERP provider Workday is leading this evolution by regularly releasing updates and improvements to boost employee productivity and business operations. It’s critical to comprehend the critical elements that will influence an organization’s journey as it gets ready for the most recent Workday release. This post explores the top five essentials you should know about Workday releases to handle these updates with assurance, making the most of them for your company. **Embracing the Cadence: Weekly and Biannual Releases** Workday delivers new features on a scheduled basis with biannual feature releases and weekly service updates. Weekly updates maintain your Workday by delivering minor enhancements and timely fixes with little to no impact on users. The HCM and Financials modules, in particular, benefit greatly from the substantial new features in addition to functionalities that are introduced in the biannual releases. Organizations must adopt these significant releases with careful thought and preparation. It’s essential to comprehend the significance of the biannual feature releases in order to plan ahead, execute changes with ease and take advantage of the newest Workday innovations for your operational procedures. **Comprehensive Testing: Safeguarding Business Continuity** Every Workday release has the potential to affect current business processes in addition to integrations, especially the biannual feature releases. Thorough testing is necessary to reduce risks and guarantee smooth operations. It should cover performance, integration, and functional aspects, confirming that the updates have no impact on the essential business processes. It is crucial to involve cross-functional teams in the testing process, subject matter experts, and end users with technical resources. In addition to ensuring comprehensive testing coverage, this cooperative approach promotes a common understanding of the implications of the release and makes efficient change management possible. **Change Management: Embracing Innovation and Adaptation** New features and capabilities are frequently added to Workday releases, which have the potential to completely transform business operations. Adopting these changes, though, calls for thorough preparation and successful change management techniques. To guarantee a seamless transition, organizations must notify stakeholders in advance of impending changes and offer training and support. It is equally important to recognize potential resistance to change in addition to taking appropriate action. Organizations can better navigate the complexities of Workday releases and take advantage of the opportunities they present for process optimization in addition to operational excellence by cultivating a culture of continuous learning and adaptation. **Integration Considerations: Maintaining Seamless Connectivity** Workday frequently acts as a central hub in today’s networked business environment by integrating with numerous third-party applications and systems. It’s critical to evaluate how new releases will affect these integrations and make sure that uninterrupted connectivity is maintained. To find potential compatibility problems and create mitigation plans, cooperation with integration partners and vendors is essential. In order to reduce the chance of interruptions to crucial business operations, organizations should also think about putting strong testing frameworks in place to verify integrations alongside data integrity following each release. **Leveraging Expertise: Partnering for Success** Even though Workday updates offer fascinating new features, it can be difficult to navigate their complexity, particularly for organizations with little resources or experience. Working with knowledgeable Workday consultants or service providers can be quite helpful in these situations. These specialized partners provide professional guidance throughout the release cycle in addition to having extensive knowledge of Workday’s architecture, functionalities, and best practices. Leveraging outside expertise can expedite adoption, reduce risks and guarantee that businesses get the most out of their Workday investment—from assessment and planning to implementation and optimization. **Conclusion** Workday releases demonstrate the organization’s dedication to ongoing innovation and development. With rich features designed to handle the complexities of Workday updates, Opkey, the official Workday Testing Partner, stands out as the best option for optimizing Workday testing. Businesses benefit from its no-code test automation platform, which makes it simple for non-technical users like business analysts and end users to participate in the testing process. Opkey’s inherent intelligence streamlines the creation of scripts, and its capacity for change impact analysis allows it to identify the exact scope of testing that is needed, facilitating resource allocation and prioritization. In addition, Opkey optimizes testing efforts for Workday environments by offering pre-built test accelerators and utilizing test discovery techniques to find gaps.

rohitbhandari102

"Connecting to an EC2 Instance Using SSH: Easy Steps to Access Your Instance"

Gather EC2 Instance Details Public DNS (or Public IP): Identify the Public DNS (or IP address) of...

https://dev.to/vishal_raju_6a7ca9503a75b/connecting-to-an-ec2-instance-using-ssh-easy-steps-to-access-your-instance-dhk

cloud, aws, learning, cloudcomputing

 1. Gather EC2 Instance Details Public DNS (or Public IP): Identify the Public DNS (or IP address) of your EC2 instance. You can find this in the AWS Management Console under the Instances section. Key Pair File (.pem): Ensure you have the private key (.pem file) that was used when launching the instance. If you don’t have it, you might need to create a new key pair and associate it with your instance. 2. Set Permissions for Your Key Pair File Ensure that the permissions on your key pair file are set correctly to maintain security. In a terminal or command prompt, use the following command: bash Copy code chmod 400 /path/to/your-key-pair.pem Replace /path/to/your-key-pair.pem with the actual path to your key pair file. 3. Open Your Terminal or Command Prompt Open a terminal window (Linux or macOS) or a command prompt (Windows). 4. Connect Using SSH Use the ssh command to connect to your EC2 instance. The syntax is: bash Copy code ssh -i /path/to/your-key-pair.pem ec2-user@your-instance-public-dns Replace: /path/to/your-key-pair.pem: Path to your .pem file. ec2-user: Username for your instance (can vary by operating system; for example, ubuntu for Ubuntu instances). your-instance-public-dns: Public DNS (or IP address) of your EC2 instance. For example: bash Copy code ssh -i ~/Downloads/your-key-pair.pem [email protected] 5. Authenticate and Connect If it’s your first time connecting to this instance, you may see a message about the authenticity of the host. Type yes to continue connecting. You should now be connected to your EC2 instance via SSH. 6. Post-Connection Tasks Once connected, you can execute commands on your EC2 instance terminal just like you would on a local terminal. Troubleshooting Tips: Security Group Settings: Ensure that your EC2 instance’s security group allows SSH access (port 22) from your current IP address or IP range. Instance State: Verify that your EC2 instance is running and reachable over the network. This detailed guide should help you connect to your EC2 instance securely using SSH. 

vishal_raju_6a7ca9503a75b

Building a Successful Career: Key Insights for Junior Developers

Sarah had just landed her dream job as a junior developer at a promising startup. Excited and eager...

https://dev.to/grover_sumrit/building-a-successful-career-key-insights-for-junior-developers-2c1a

development, beginners, javascript, programming

Sarah had just landed her dream job as a junior developer at a promising startup. Excited and eager to prove herself, she dove headfirst into her first project. However, as weeks went by, she found herself struggling with feedback from her team lead, feeling overwhelmed by the constant need to learn new technologies, and battling fatigue from long coding sessions. Sarah's experience is not unique – many junior developers face similar challenges as they navigate the early stages of their careers. In this blog post, we'll explore five common mistakes that junior developers often make and provide insights on how to avoid them. By understanding these pitfalls, you can set yourself up for success and grow into a more confident and skilled developer. ##Ignoring Feedback One of the most crucial aspects of personal and professional growth is the ability to receive and act upon feedback. As a junior developer, you'll receive feedback in various formats – code reviews, meetings, one-on-one sessions, and more. However, a common mistake is to ignore this feedback or take it too personally. It's essential to understand that feedback is not a personal attack but a valuable tool for improvement. The person providing feedback is often more experienced and has insights that can help you grow. When receiving feedback, try to set aside your ego and approach it with an open mind. Take notes during meetings to better understand your shortcomings and areas for improvement. Many junior developers fall into the trap of taking feedback personally, feeling as if others are pointing out their faults to make them feel bad. This attitude is often driven by ego or a know-it-all mentality. Such developers may fall into the 'Low Competence-High Confidence' category of the Dunning-Kruger effect, where they overestimate their abilities.  To avoid this mistake, cultivate a growth mindset. Embrace feedback as an opportunity to learn and improve. Remember that even the most senior developers continue to receive and act upon feedback throughout their careers. ##Neglecting Career Development In the daily grind of your job, it's easy to neglect the importance of continuous learning and upskilling. Many junior developers find themselves so focused on their immediate tasks that they lose sight of the bigger picture – their long-term career development. Keeping yourself up-to-date is crucial for your career growth. The tech industry evolves rapidly, and staying current with new technologies, methodologies, and best practices is essential. However, many junior developers feel they hardly have time to enhance their knowledge beyond their immediate work. To avoid this mistake, make a conscious effort to dedicate time to your professional development. There are many simple ways to continuously enhance your knowledge. Reading books and articles, listening to podcasts, and watching webinars can broaden your understanding of various topics. These activities don't require extensive planning and can be done during breaks or while commuting. Don't overlook the value of coding challenges and virtual conferences. Participating in these activities can be both fun and educational, while also providing networking opportunities. Remember, investing in your skills and knowledge is investing in your future. ##Rushing into Coding Without Analysis A common pitfall for junior developers is the tendency to start coding as soon as they're assigned a task, without spending adequate time analyzing the problem at hand. This eagerness to dive into code can lead to misunderstandings, inefficient solutions, and potential rework. To avoid this mistake, make it a habit to thoroughly analyze the requirements before writing a single line of code. Start by making a list of assumptions and validating them with your product managers or whoever assigned the task. This step ensures that you have a clear understanding of the problem you're trying to solve. Additionally, take the time to understand the non-functional aspects of the task. Consider questions like: How many transactions per second should the feature handle? Are there any specific performance requirements? Once you have a comprehensive understanding of the task, write down all the requirements and create a checklist of what needs to be done before the task is ready for testing. By taking this analytical approach, you'll be better prepared to write efficient, effective code that meets all the necessary requirements. This method may seem time-consuming at first, but it will save you time and effort in the long run by reducing errors and rework. ##Risking Burnout For many junior developers, coding can become an addiction. When faced with an exciting problem, you might find yourself glued to your desk, determined not to leave until you've solved it. While this dedication is admirable, it can be detrimental to your health and long-term productivity. Burnout is a real risk in the tech industry, and its effects can be severe. Once you experience burnout, your motivation levels can plummet, making it difficult to focus on your work. To avoid this, it's crucial to maintain a healthy work-life balance and take regular breaks. Implement a method that works for you, such as the Pomodoro Technique, where you work for focused intervals followed by short breaks. Set reminders to ensure you step away from your desk regularly. Don't be afraid to take extended leaves when needed – many developers worry about missing out, but taking time to recharge is essential for your long-term success and well-being. Remember, sustainable productivity is more valuable than short bursts of intense work followed by periods of burnout. By taking care of your mental and physical health, you'll be able to maintain your passion for coding and perform at your best in the long run. ##Misunderstanding Self-Worth Whether you're fresh out of college or a seasoned developer, understanding your self-worth is crucial. Many junior developers either overestimate or underestimate their capabilities, and neither extreme is beneficial for your career growth. Developers who overestimate their abilities often have unrealistic expectations from their first job. They may feel they're doing the company a favor by working there, which can negatively impact their performance in interviews and their work attitude. On the other hand, those who underestimate their abilities might accept the first offer they receive without negotiating or considering if it aligns with market standards. They may also hesitate to ask about the nature of the work or whether the company culture is a good fit for them. To avoid this mistake, strive for a balanced understanding of your skills and worth. Research industry standards for your position and location. Use resources like Glassdoor or AmbitionBox to learn about company cultures and employee experiences. Don't be afraid to ask questions during interviews about the work you'll be doing and the growth opportunities available. Remember, knowing your worth doesn't mean being arrogant or inflexible. It means having a realistic understanding of your skills, being open to growth, and seeking opportunities that align with your career goals and values. --- ##Conclusion As a junior developer, navigating the early stages of your career can be challenging. By being aware of these common mistakes – ignoring feedback, neglecting career development, rushing into coding without analysis, risking burnout, and misunderstanding self-worth – you can take proactive steps to avoid them. Remember Sarah from our opening story? By recognizing these pitfalls and actively working to overcome them, she was able to turn her challenges into opportunities for growth. She learned to embrace feedback, dedicated time to continuous learning, improved her problem-solving approach, maintained a healthy work-life balance, and developed a realistic understanding of her worth. Your journey as a developer is a marathon, not a sprint. By avoiding these common mistakes and cultivating good habits early in your career, you'll set yourself up for long-term success and satisfaction in the exciting world of software development.

grover_sumrit

MOST RELIABLE HACKER TO RECOVER LOST BITCOIN CONTACT LEE ULTIMATE HACKER

LEEULTIMATEHACKER@ AOL. COM Support @ leeultimatehacker .com telegram:LEEULTIMATE wh@tsapp +1 (715)...

https://dev.to/penelope_enzo_881b4fc0055/most-reliable-hacker-to-recover-lost-bitcoin-contact-lee-ultimate-hacker-42gi

LEEULTIMATEHACKER@ AOL. COM Support @ leeultimatehacker .com telegram:LEEULTIMATE wh@tsapp +1 (715) 314 - 9248 https://leeultimatehacker.com One morning, I found myself drawn into the promise of easy wealth through online advertisements for an investment platform. Tempted by the idea of financial freedom, I cautiously dipped my toes into this seemingly lucrative opportunity, starting with a small amount of money. Initially, the returns seemed promising and I felt reassured. Gradually, I increased my investment, hoping for greater profits. However, my optimism was short-lived. Without warning, the website disappeared, leaving me unable to access my funds. Shock and disbelief washed over me as I realized I had fallen victim to a sophisticated scam. It felt surreal, like a cruel twist of fate. In a desperate attempt to recover my savings, I scoured the internet for solutions. Amidst the chaos of cautionary tales and dubious claims, I came across Lee Ultimate Hacker. Their reputation for successfully retrieving stolen funds gave me a glimmer of hope. Following a recommendation from someone who had also been rescued by Lee Ultimate Hacker, I reached out to them. With a heavy heart, I recounted my experience, detailing the deception and the substantial sum I had lost. Their response was prompt and professional, offering reassurance and a plan of action. Armed with advanced tracing software and expert investigative skills, Lee Ultimate Hacker embarked on the mission to reclaim what was rightfully mine. The hours that followed were filled with anticipation and anxiety, each moment punctuated by hope and fear. Then, a breakthrough came. A notification from Lee Ultimate Hacker confirmed the successful recovery of my funds. Relief flooded through me, accompanied by gratitude for their unwavering dedication and expertise. In a world where trust is easily exploited, they stood as a beacon of integrity and competence. Beyond the financial restitution, Lee Ultimate Hacker restored my faith in justice. Their compassion and commitment transcended mere recovery; they restored my belief in the goodness of people and their ability to make things right. To those navigating the complexities of online investments or grappling with the aftermath of scams, I offer this advice: while caution is crucial, know that there are professionals like Lee Ultimate Hacker who stand ready to help. They are not just experts in recovery but guardians of hope, dedicated to protecting victims and restoring their peace of mind. My journey from victim to victor was marked by hardship and heartache, but ultimately, it was a testament to resilience and the power of seeking help from those who truly care. Lee Ultimate Hacker is indeed the real deal, a testament to their unwavering commitment to justice and their ability to turn despair into triumph. 

penelope_enzo_881b4fc0055

YOLOv8 Screen Capture Detection App

Tentang Program Saya mencoba membuat aplikasi pendeteksian di dalam monitor sebagai bentuk...

https://dev.to/zero45/yolov8-screen-capture-detection-app-300n

beginners, python, ai, indonesia

## Tentang Program Saya mencoba membuat aplikasi pendeteksian di dalam monitor sebagai bentuk skripsi dari perkuliahan saya, dengan cara kerja menangkap bytes yang ada di layar monitor > clone image from bytes > convert numpy array > plot/detect(YOLOv8) > clone image from array > show result. *Sekedar sharing project, diharapkan saya mendapatkan beberapa masukkan terkait project. Terima kasih sudah membaca. ## Model: YOLOv8 - Mendeteksi tidak pakai helm, sarung tangan dan jacket. ## General User Interface - Tkinter ## Screen Orientation - 1680x1050 - 1600x900 (recommended) - 1440x900 - 1400x1050 ## List Button 1. Play button : menjalankan pendeteksian 2. Pause button : memberhentikan pendeteksian(sebagai limiter while loop). 3. Disable Screen button : Set screen menjadi default(saat awal di buka). 4. Sharpen button : Membuat image menjadi sharpen dengan cv2. 5. Nightvis button : Membuat image menjadi BGR2HLS dengan cv2. 6. Save Button : Untuk sekarang masih save dalam bentuk foto .png (*Next akan di coba update untuk save video .mp4). 7 Update Button : Untuk mengkonfigurasi inference dari model yang sudah di latih (accuracy : imgsz, IoU, Conf). 8. Reset Button : Untuk mengreset konfigurasi inference menjadi nilai default. 9. Quit Button : Untuk keluar dari program. ## Preview Program  Kondisi awal mulai  Detect Normal  Detect Sharpen  Detect Sharpen + Nightvis ## Code Bagian ini saya akan menjelaskan apa yang saya tulis di dalam code.  Line 1 - 9 adalah beberapa packages yang dibutuhkan dalam menjalankan program. 1. Multiprocessing < diadakan untuk menghindari program memiliki window lebih dari yang dibuat. (*Masih belum pasti) 2. Ultralytics < untuk pendeteksian pada numpy array yang dimiliki sebagai data. 3. Tkinter < untuk GUI 4. Numpy < numpy array 5. cv2 < untuk konfigurasi image (filter, konversi warna) 6. os.path < untuk pengecekan file pada proses save image agar tidak overwrite. 7. mss < untuk menangkap bytes dari monitor yang digunakan. 8. PIL < untuk mengclone image dari bytes dan dari array. 9. random < untuk membuat angka random  wdw adalah window utama yang akan digunakan untuk menampilkan pendeteksian. beberapa variable di set false dikarnakan pendeteksian diawali dengan deteksi normal. setiap variable bisa saja berubah sesuai input user. window utama memiliki title, dan icon. Hal yang perlu di perhatikan adalah mendapatkan nilai yang sebenarnya dari screen monitor (display orientation) di aplikasi ini saya pakai .winfo_screenwidth() dan .winfo_screenheight(). beberapa variable digunakan untuk starting position, dan lebar, tinggi dari window app.  karna button divisualisasikan dengan image, maka perlu beberapa image untuk button. variable listwidget digunakan untuk menampung semua button yang sudah dibuat, agar tidak terjadi overwrite. iou, conf, dan acu variable disiapkan untuk tampungan nilai dari sliders pada aplikasi. withdraw() untuk menyembunyikan main window (sebagai salah satu cara membuat splash screen).  kumpulan function untuk membuat button, sliders, dan label yang memiliki beberapa parameter yang dibutuhkan. untuk button memerlukan 3 argument : argument pertama image, argument kedua perintah untuk menjalankan function yang di tugaskan pada button, argument ketiga letak frames. labelinfo hanya 1 argument : argument untuk pesan string. sliders 3 argument : argument pertama untuk variable yang akan di tampung nilai dari sliders, argument kedua untuk nama sliders, argument ketiga untuk posisi start sesuai default inference argument YOLOv8 Detect.  mengresize semua image yang akan digunakan pada pembuatan button.  function yang digunakan untuk membuat window splashscreen, dimana window ini akan tampil diawal saat program dijalankan selama beberapa detik. dan di dalam nya terdapat beberapa kata motivasi untuk tetap hidup dan berjuang. window ini di tampilkan di tengah layar dengan ketentuan nilai tertentu(tidak adaptive ke berbagai resolusi). Diperlukan pengurangan dengan width dan height dari window splash screen agar window splash screen berada di tengah.   semua yang dibutuhkan main window terload up > munculkan splash screen > tunggu 5 detik. splashscreen dihancurkan dan main window ditampilkan kembali.   Kedua gambar diatas adalah inti dari program dimana program membuat sebuah jaring penangkap bytes dengan mss. starting position jaring top(0), left(0), lebar jaring, tinggi jaring. setelah mendapatkan bytes, clone image dari bytes, dan buat kernel untuk sharpen image. di normal detection tidak menggunakan kernel, kernel dipakai jika variabel sharpeOn bernilai True. hasil dari clone image > numpy array untuk melakukan pendeteksian YOLO dan plotting > hasil pendeteksian dibuat clone image dari array > kedalam variable yang akan mengupdate image pada label tkinter.  Untuk perintah tombol start jalankan detect() dan config state dari beberapa tombol "active" / "disable" untuk mengurangi kemungkinan bug yang akan terjadi karna user input.  Untuk memberhentikan detect()/sebagai limiter dari while loop(wdw.after())  disable button memiliki perintah hampir sama dengan pause, hanya membuat program kembali ke state awal saat dijalankan(layar pendeteksian).  untuk button sharpen dan nightvis bersifat togle dengan tujuan memberikan nilai True / False, yang nantinya akan mempengaruhi detect().  melakukan pengecekan if dengan nama file, agar tidak terjadi overwrite data dan save image hasil clone image menjadi .png  update model ini digunakan ketika button update model di tekan, mengubah nilai default dari imgsz(accuracy), conf, dan iou sesuai input user dari sliders. *nilai imgsz harus bisa dibagi 2^5 dan menghasilkan int. karna hal ini akan mempengaruhi backbone dari YOLO.  Reset model untuk mengembalikan nilai ke default dari model yang sudah diupdate imgsz, Conf, dan IoU.  Quit program dengan membalikan layar utama ke initial state dan memberi jeda 3 detik untuk hancurkan window utama lalu exit program.  gambar diatas merupakan kumpulan frame(untuk tata letak) dan widget yang di butuhkan main window untuk melakukan tugas nya dalam mendeteksi. setiap line di eksekusi ketika main window dalam keadaan hide agar saat splash screen dihancurkan dan main window di tampilkan, semua dalam keadaan siap. ## FULL CODE https://github.com/Alfin45/YOLOv8-Screen-Capture-Detection-App

zero45

Displaying Car Information Dynamically Using JavaScript and HTML

We will explore how to display car information using _JavaScript _and HTML dynamically. We'll create...

https://dev.to/sudhanshu_developer/displaying-car-information-dynamically-using-javascript-and-html-3k3k

javascript, beginners, programming, webdev

We will explore how to display car information using **_JavaScript _**and **_HTML_** dynamically. We'll create a simple web page that showcases car details in a table format, demonstrating how to retrieve and render data from JavaScript objects. Whether you're new to web development or looking to enhance your skills, this guide will walk you through the process step-by-step. _Example 1._ It is a normal object `index.html` ``` <div class="row"> <table class="table table-bordereds"> <thead> <td>Sr.No</td> <td>Name</td> <td>Color</td> </thead> <tbody class="bg-light" id="CarInfo"></tbody> </table> </div> ``` `script.js` ``` let myCar = { name: "Rang Rover", Color: "Black", }; ` console.log(myCar.name);` let CarInfoDisplay = ` <td scope="row">${1}</td> <td>${myCar.name}</td> <td>${myCar.Color}</td> `; document.getElementById("CarInfo").innerHTML = CarInfoDisplay; ``` **Our output will appear like this** `index.html`  _**Example 2.**_ It is a nested object `index.html` ``` <div class="row"> <table class="table table-bordereds"> <thead> <td>Sr.No</td> <td>Name</td> <td>Color</td> <td>Module</td> <td>Price</td> <td>Run</td> <td>State</td> <td>City</td> </thead> <tbody class="bg-light" id="CarInfo"></tbody> </table> </div> ``` `Script.js` ``` let myCar = { name: "Rang Rover", Color: "Black", carinfo: { module: "2024", price: "5,54,900/-", freeservice: "5", run: "5000", state: "MH", city: "Nanded", }, }; let CarInfoDisplay = ` <td scope="row">${1}</td> <td>${myCar.name}</td> <td>${myCar.Color}</td> <td>${myCar.carinfo.module}</td> <td>${myCar.carinfo.price}</td> <td>${myCar.carinfo.run}</td> <td>${myCar.carinfo.state}</td> <td>${myCar.carinfo.city}</td> `; document.getElementById("CarInfo").innerHTML = CarInfoDisplay; ``` **Our output will appear like this** `index.html`  _**Example 3.**_ Array Of Objects `index.html` ``` <div class="container"> <div class="row"> <table class="table table-bordereds"> <thead> <td>Sr.No</td> <td>Name</td> <td>Color</td> <td>Module</td> <td>Price</td> <td>Run</td> <td>State</td> <td>City</td> </thead> <tbody class="bg-light" id="CarInfo"></tbody> </table> </div> </div> ``` `Script.js` ``` let myCar = [ { id: 1, name: "Rang Rover", Color: "Black", carinfo: { module: "2024", price: "5,54,900/-", run: "5000", state: "MH", city: "Nanded", }, }, { id: 2, name: "Thunderbolt", Color: "Gray", carinfo: { module: "2020", price: "44,79,900/-", run: "15,500", state: "MH", city: "Pune", }, }, { id: 3, name: "Thunderbolt", Color: "Blue", carinfo: { module: "2020", price: "44,60,900/-", run: "15,500", state: "MH", city: "Nanded", }, }, { id: 4, name: "Vortex", Color: "Red", carinfo: { module: "2022", price: "10,54,900/-", run: "15,500", state: "MH", city: "Pune", }, }, { id: 5, name: "Cobra", Color: "Black", carinfo: { module: "2024", price: "46,54,900/-", run: "15,500", state: "MH", city: "Nanded", }, }, { id: 6, name: "Phoenix", Color: "Black", carinfo: { module: "2024", price: "65,54,900/-", run: "15,500", state: "MH", city: "Hyderabad", }, }, { id: 7, name: "Falcon", Color: "Sky Blue", carinfo: { module: "2024", price: "99,54,900/-", run: "15,500", state: "MH", city: "hyderabad", }, }, ]; console.log(myCar); console.log(myCar[0].name); console.log(myCar[0].carinfo.price); let carInfoDisplay = ""; myCar.map((val, index) => { return (carInfoDisplay += ` <tr key={index}> <td>${val.id}</td> <td>${val.name}</td> <td>${val.Color}</td> <td>${val.carinfo.module}</td> <td>${val.carinfo.price}</td> <td>${val.carinfo.run}</td> <td>${val.carinfo.state}</td> <td>${val.carinfo.city}</td> </tr> `); }); document.getElementById("CarInfo").innerHTML = carInfoDisplay; ``` **Our output will appear like this** 

sudhanshu_developer

A must-have for database entry, a complete collection of SQL statements

Data Definition Language (DDL) DDL is used to define and modify database structures. CREATE...

https://dev.to/tom8daafe63765434221/a-must-have-for-database-entry-a-complete-collection-of-sql-statements-8jh

Data Definition Language (DDL) DDL is used to define and modify database structures. CREATE DATABASE: Create a new database. DROP DATABASE: Delete a database. CREATE TABLE: Create a new table. ALTER TABLE: Modify the table structure, such as adding, deleting, or modifying columns. DROP TABLE: Delete a table. CREATE INDEX: Create an index to improve query efficiency. DROP INDEX: Deletes an index. Data Manipulation Language DML DML is used to add, delete, and modify data in the database. INSERT INTO: Inserts new data into a table. UPDATE: Update the data in the table. DELETE: Delete data from the table. Data Query Language DQL DQL is mainly used to query data in the database. SELECT: Select data from the database. It can be used with various clauses, such as WHERE condition filtering, ORDER BY sorting, GROUP BY grouping, and so on. JOIN: Combines rows from two or more tables based on common fields between these tables. Data Control Language DCL DCL is used to define the access permissions and security levels for databases, tables, and fields. GRANT: Grant user permissions. REVOKE: Recover user permissions. transaction control statement BEGIN TRANSACTION or START TRANSACTION: Start a transaction. COMMIT: Submits the current transaction, making all changes since BEGIN TRANSACTION permanent. ROLLBACK: Roll back the current transaction, canceling all changes since BEGIN TRANSACTION.

tom8daafe63765434221

Introducing Myself

Hello members, I am Srinivasan Master's graduate in Computer. At present I am practicing on doing...

https://dev.to/swasthiksoftware/introducing-myself-4a65

Hello members, I am Srinivasan Master's graduate in Computer. At present I am practicing on doing projects in Bootstrap, React JS jQuery php and MySQL. I will use this website efficiently to improve myself and contribute to community. Any useful comments are welcome. Thankyou!

swasthiksoftware

Innovative Solutions from KvonTech Consultancy Services Private Limited

In today's fast-paced digital era, businesses face increasing demands for efficiency, automation, and...

https://dev.to/kvontech_90f69339b5805fd8/innovative-solutions-from-kvontech-consultancy-services-private-limited-57g5

api, webdev, javascript, programming

In today's fast-paced digital era, businesses face increasing demands for efficiency, automation, and digital transformation. At **[KvonTech Consultancy Services Private Limited](https://kvontech.com/)**, we specialize in delivering cutting-edge solutions across a spectrum of services: RPA & AI/ML solutions, education and training, software development, e-commerce portals, digital marketing strategy, and mobile app development. Tailored Solutions for Every Need Our approach is centered on understanding and addressing the unique challenges of each client. Whether it's optimizing business processes through robotic process automation (RPA) and advanced AI/ML algorithms, enhancing workforce capabilities through specialized education and training programs, or developing bespoke software and e-commerce platforms, we tailor our solutions to meet specific business objectives. Innovation at the Core Innovation is the cornerstone of our services. We are committed to pushing the boundaries of technology to deliver solutions that not only meet but exceed client expectations. Our team of experts is dedicated to exploring new avenues in digital marketing strategy, leveraging the latest tools and techniques to enhance online presence and customer engagement. Transforming Data into Actionable Insights Central to our mission is the ability to transform data into actionable knowledge. Through our creative web solutions, we empower businesses to harness the power of data analytics and insights. By turning raw data into actionable intelligence, our clients gain a competitive edge, making informed decisions that drive growth and success. Affordable Excellence Our creative models and designs are not only cost-effective but also robust and scalable, ensuring long-term value for our clients. Beyond Software: Partnering for Success At KvonTech Consultancy Services Private Limited, we don't just deliver software solutions; we forge lasting partnerships. Our commitment to exceeding expectations extends beyond technical implementation to comprehensive support and collaboration. We work closely with our clients to understand their evolving needs, providing ongoing guidance and innovative solutions that adapt to market dynamics and industry trends. Conclusion In conclusion, **[KvonTech](https://kvontech.com/)** Consultancy Services Private Limited stands at the forefront of innovation, delivering tailored solutions across RPA & AI/ML, education and training, software development, e-commerce, digital marketing, and mobile apps. With a focus on creativity, affordability, and transformative impact, we empower businesses to thrive in the digital age. Partner with us and experience the difference of visionary solutions that drive success and growth.

kvontech_90f69339b5805fd8

MSIL

IL (Intermediate Language) .NET’dagi oraliq til boʻlib, MSIL (Microsoft Intermediate Language) yoki...

https://dev.to/shoxjaxon1202/msil-35f6

dotnet, csharp, dotnetcore, dotnetframework

**IL** (Intermediate Language) .NET’dagi oraliq til boʻlib, MSIL (Microsoft Intermediate Language) yoki CIL (Common Intermediate Language) nomi bilan ham tanilgan. C# yoki VB.NET kabi tillardagi manba kodi to'g'ridan-to'g'ri mashina kodiga emas, balki birinchi navbatda ILga kompilyatsiya qilinadi va bu uni platformadan mustaqil qiladi. **Arxitektura mustaqilligi**: IL kodi CLR (Common Language Runtime) ning tegishli versiyasi o'rnatilgan har qanday platformada ishlashi mumkin. Bu ishlab chiquvchilarga kodni bir marta yozish va uni turli xil operatsion tizimlar va protsessor arxitekturalarida ishga tushirish imkonini beradi. **JIT kompilyatsiyasi**: Dastur ishga tushirilganda, IL JIT kompilyatori (Just-In-Time kompilyatori) yordamida mashina kodiga aylantiriladi. Ushbu jarayon maqsadli platformada optimal ishlashni ta'minlash uchun ish vaqtida sodir bo'ladi. **.Net da MSIL nima?** Dasturni ishlab chiqish jarayonida .Net platformasi turli dasurlash tillari(C#, F#,Visual basic) uchun har birida alohida kompilyatorlardan foydalanadi. Biz yozgan kodimiz kompilyatsiya jarayonidan keyin, har bir .Net kompilyatori kodimizni intermediate code (o’rta kod) ga o’girib beradi, va har bir muhit bunda MSIL dan foydalanadi. Bu bo’limda biz MSIL nima ekanligini batafsil o’rganamiz. **MSIL nima?** Microsoft Intermediate Language (MSIL) ba’zan Common Intermediate Language (CIL) nomi bilan ham ataladi. U turli kompilyatorlar (C#, VB, .NET va boshqalar) tomonidan ishlab chiqariladi va tillarning xos kompilyatorlaridan mutlaqo turli tushuncha hisoblanadi. NET Framework SDK (FrameworkSDKBinildasm.exe) tarkibiga kiritilgan ILDasm (Intermediate Language Disassembler) dasturi foydalanuvchilarga MSIL kodini inson o‘qiy oladigan formatda ko‘rish imkonini beradi. Ushbu dastur yordamida biz MSIL kodini istalgan.NET bajariladigan faylida (EXE yoki DLL) ko'rishimiz mumkin. Execution (bajarish) jarayoni CLR(Common language runtime) da Quyidagi jarayonda biz MSIL ishlashi va JIT kompilyatorining MSIL ni mashina kodiga o’girishi ko’rsatib beramiz. • CLR kompilyatsiya qilish vaqtida tilga xos kompilyator manba kodini MSIL ga o'zgartiradi. MSILga qo'shimcha ravishda, kompilyatsiya paytida metama'lumotlar hosil bo'ladi. Metama’lumot koddagi turlarning ta'rifi, assembly versiyasi, qo’shimcha ulangan tashqi assembly ro’yxati, shuningdek, runtime(ish vaqti) haqidagi ma'lumot kabi elementlarni o'z ichiga oladi. • MSIL CLI(Common Language Infrastructure ) assembleyida jamlanadi. Bu assembly xavfsizlik, versiyalashtirish, deployment va boshqa maqsadlarda foydalanish uchun qurilgan kodlar kutubxonasi hisoblanadi. U ikki turga bo'linadi: process assembly (EXE) and library assembly (LIB) (DLL). • Keyin JIT kompilyatori Microsoft Intermediate Language (MSIL) ni o'zi bajarayotgan kompyuter muhiti bilan bog'liq bo'lgan mashina kodiga tarjima qiladi. MSIL kodimizni turli talablar asosida mashina kodiga aylantiriladi, ya'ni JIT kompilyatori butun MSIL emas, balki faqat zarur bo'lgan MSIL ni kompilyatsiya qiladi. • So’ngra JIT kompilyatori kompyuter protsessorida bajariladigan mashina kodini hosil qiladi. **Umumiy ko’rinishda quyidagi jarayon sodir bo’ladi:**  **.Net da MSIL ning rollari** 1. Platform Independence: - Platforma mustaqilligi bir xil bayt kodli buyruq fayli istalgan platformaga joylashtirilishi mumkinligini anglatadi. Boshqacha qilib aytganda, MSIL ma'lum bir protsessorga bog'liq bo'lmagan portativ ko'rsatmalar to'plamini belgilaydi. 2. Performance Improvement: - Bir vaqtning o'zida butun dasturni yaratish o'rniga, JIT kompilyatori kerak bo'lganda kodning har bir qismini kompilyatsiya qiladi. Biz kodni bir marta kompilyatsiya qilganimizda, kompilyatsiya toki application (ilova) yaratgunimizga qadar saqlanib qoladi, shuning uchun biz kodimizni qayta run(yurg’izish) qilishimizga hojat qolmaydi. Bu usul to'liq dastur kodini boshidan kompilyatsiya qilishdan ko'ra tezroq. Bundan tashqari, MSIL kodini ishga tushirish native mashina kodini ishlatish kabi tez ekanligini ko'rsatadi. 3. Language Interoperability: - Tilning o’zaro muvofiqligi uning foydalanuvchanligini oshiradi. Bitta tildan MSIL ga kompilyatsiya qilish mumkin va natijada olingan kod boshqa tildagi kodga (MSIL ga kompilyatsiya qilingan) mos keladi. Til tanlash ishlab chiquvchilar tomonidan nazorat qilinmaydi. Osonroq tushuntiradigan bo’lsak bitta dasturda bir nechta tillardan ham foydalanish mumkin. Quyidagi rasmda yanayam tushunarliroq bo’ladi degan umiddaman.  **Reducing maintenance headaches**: - CLR MSIL kodini xavfsizlik standartlarga mos kelishini tekshiradi. Build time vaqtida xavfsiz bo’lmagan qismlarni aniqlashi mumkin, bu esa texnik xizmat ko’rsatish bosh og’riqlarini sezilarli darajada kamaytiradi. **Xulosa **o’rnida shuni aytishimiz mumkinki, MSIL kodi har bir.NET assemblyning asosidir. MSIL instruksiyalar toʻplamini qanchalik koʻp bilsangiz, mukammal .NET ilovalarini ishlab chiqishni shunchalik yaxshi tushunasiz.

shoxjaxon1202

How OP Superchain Makes L2s highly interoperable: Present & the Future

OP Superchain ecosystem is growing tremendously. The reason for this can be battle-tested security,...

https://www.zeeve.io/blog/how-op-superchain-makes-l2s-highly-interoperable-present-the-future/

opstack, rollups

<p>OP Superchain ecosystem is<a href="https://www.superchain.eco/chains"> growing tremendously</a>. The reason for this can be battle-tested security, super scaling, and modularity. But, cross-L2s interoperability is said to be the most significant factor that has encouraged big names like Base, Zora, Mantle Network, and Ancient8 to build their standalone OP rollup chains.</p> <p>Considering this, our article digs into the core concept of OP Superchain Interoperability, highlighting its current solutions and the vision superchain has created for the future. Basically, it aims to give you an idea about how OP chains operate right now in terms of interoperability and what solutions they can adopt for a sustainable future.</p> <figure class="wp-block-image aligncenter size-large"><a href="https://www.zeeve.io/appchains/optimistic-rollups/"><img src="https://www.zeeve.io/wp-content/uploads/2024/06/Launch-your-modular-OP-Stack-with-40-Integrations-1024x213.jpg" alt="OP Superchain Interoperability" class="wp-image-71227"/></a></figure> <h2 class="wp-block-heading" id="h-the-critical-need-of-interoperability-across-op-stack-superchains">The critical need of interoperability across OP Stack Superchains</h2> <p>As we know, each <a href="https://www.zeeve.io/appchains/optimistic-rollups/">OP chain</a> has the end goal to satisfy the specific requirements of both dApp builders and the end users. For example, a dApp user may look for seamless onboarding, high transaction speed, low fees, zero transaction failures, and a simple yet powerful wallet infrastructure. Talking about developers, they seek easy access to liquidity, governance, and cross-chain transfers. The requirements for all these stakeholders can be catered through enabling unparalleled OP Superchain&nbsp; interoperability. Here’s why end-to-end interoperability is critical for OP superchain:</p> <ol><!-- wp:list-item --> <li><strong>Seamless token bridging: </strong>The capability of OP chains being able to bridge assets cross-chain enables web3 builders to create sustainable DeFi solution on top of OP stack. Plus, ease of bridging avoids the hassle of incorporating burn &amp; mint standards.&nbsp;</li> <!-- /wp:list-item --> <!-- wp:list-item --> <li><strong>Inter-chain state verification</strong>: L2 builders seek the ability to read and verify chain’s state easily on different chains without going through the prolonged process of initiating messages and its verification.</li> <!-- /wp:list-item --> <!-- wp:list-item --> <li><strong>Atomic transactions: </strong>Atomic transaction is a critical component for dApps, especially the DeFi apps; which consist of atomic inclusion and atomic execution. With inclusion, dApps can get the ability to burn/mint-like features. Meanwhile, atomic execution enables the seamless moving of assets like flash loans across various chains, allowing users to hop on L2s that offer lower interest.&nbsp;</li> <!-- /wp:list-item --></ol> <h2 class="wp-block-heading" id="h-superchain-s-current-and-future-interoperability-state-nbsp">Superchain’s current and future interoperability state:&nbsp;</h2> <p>Optimism is working on achieving native interoperability between OP Superchains. However, OP Chains still supports end-to-end interoperability for best user experience, ease of use, and unified liquidity across sovereign chains.&nbsp;</p> <p>As discussed, we’ll first discuss what strategies OP Superchain implements at the moment and what different ideas superchain envision to adopt in future. Also, we will quickly discuss the tradeoff of all these interoperability solutions. Let’s start!</p> <h3 class="wp-block-heading" id="h-current-solutions">Current solutions</h3> <p><strong>#1:</strong> <strong>Cross-chain bridges: Optimism and 3rd party bridges</strong></p> <p>The&nbsp; idea of superchain is to introduce a network of chains that can share a common communication layer, decentralized governance, upgrades, and asset bridging–everything built on top of OP Stack. Knowing that all these are achievable through interoperability, Optimism offers an advanced cross-chain bridge that acts as a foundation to move tokens from/to any OP stack chain using the standard canonical bridge. Also, OP superchain support a range of 3rd party bridges to enable bridging between superchains and non-OP stack/Ethereum chains.&nbsp;</p> <p><strong>#2:</strong> <strong>Pluggable Interoperability Protocols: Axelar, LayerZero, Wormhole, and more</strong></p> <p>Popular interoperability protocols/layers such as Axelar, LayerZero, Wormhole, Hyperlane, and Socket are supported on OP superchains. These are essentially interoperability stacks that allow dApps to engage in cross-chain activities beyond bridging capabilities, such as sending arbitrary messages or utilizing contract logic. Projects building L2s with OP Stack can choose an interoperability layer matching their requirements and simply plug it with minimal effort or upfront cost. The selection can be mainly made based on critical parameters like permissionless deployment, the ability to detect malicious transactions or communication speed.</p> <p><strong>#3:</strong> <strong>Liquidity Layers: Catalyst, Orderly Network</strong></p> <p>Superchain allows OP chains to utilize Catalyst or Orderly Network as their modular liquidity layer. Both of these liquidity layers enable sovereign OP chains to seamlessly transfer value/assets cross-chain and tap into liquidity of Layer2s builders to allow seamless liquidity sharing across standalone chains. Further, these solutions claim to eradicate bridging challenges like fragmented liquidity, complex UX, or security breaches. Note that Catalyst and Orderly Network are already an integral part of the superchain ecosystem as Catalyst is deployed on Base and Orderly is built using OP Stack itself. Now, these are enabling interoperability across all the modular OP chains.</p> <p><strong>#4:</strong> <strong>Bridge aggregators: Jumper, Bungee, etc.</strong></p> <p>Bridge aggregators like Jumper and Bungee are innovative multi-chain bridging and swap solutions that assist OP superchains to achieve greater interoperability with any OP Stack L2s and various EVM-compatible chains. These are like one-stop solutions to buy, exchange, or swap tokens across superchains and also pay gas fees without hassle.&nbsp;</p> <p>As you might already know, there are certain challenges associated with the superchain’s existing interoperability solutions. For example, bridges can cause delays in asset/message transfer due to ‘a challenge period, liquidity fragmentation, complex UX, and security vulnerabilities like false deposits or private key compromises. Similarly, pluggable interoperability layers can cause centralization issues as they are operated through some trusted entities. Also, cost here can be high due to inclusion of Merkle proofs. As for liquidity engines, there can be issues like liquidity imbalance and price slippages.&nbsp;</p> <p>Therefore, Superchains has visioned for novel interoperability solutions that aims to unlock native interoperability for OP chains and Optimism dApps. Let’s dive into those ideas and also highlight their possible tradeoffs.</p> <h3 class="wp-block-heading" id="h-solutions-for-future">Solutions for future:</h3> <p>There are different approaches in Superchain’s <a href="https://gov.optimism.io/t/superchain-and-the-monolithic-experience-a-cross-chain-guide-for-superchain/8151">interoperability roadmap</a> through which OP Superchain aims to battle against lack of interoperability and thus facilitate seamless communication between OP chains. Let’s discuss them:</p> <p><strong>#1:&nbsp; No changes to Base layer</strong></p> <p>The approach of allowing no changes to the base layer is somewhat similar to the current space of Ethereum/EVM interoperability state. This will require OP chains to add an abstraction layer on top of the dApps’ monolithic experience, enabling them to use multi-message aggregation (MMA) tools that supports trust-minimized asset bridging across siloed chains. Initially, this solution may offer an average cross-chain experience for users, but the user experience, security, and cost will improve due to constant innovation and increasing competition. However, this solution comes with certain tradeoffs, such as expensive cross-chain interaction, lack of trust, cross-chain MEV, and MEV censorship. These tradeoffs might not be a trouble on developers’ end, but end dApp users will be highly impacted as they seek interoperability and security the most.</p> <p><strong>#2: Asynchronous composability</strong></p> <p>Asynchronous composability refers to the approach of OP Superchains leveraging IBC protocol to offer endless interoperability across OP chains. This solution is an improvised alternative to the previous solution because it offers secure cross-chain bridging without involving MMA solutions or 3rd party bridges. Hence, it allows for a cheaper and more standardized way of bridging for users. Superchain builders can retain sovereignty in this interoperability design and they can even have a near-monolithic experience if asynchronous composability is combined with proper intents. Simply put, Asynchronous composability makes verification of cross-messaging easier for OP superchains, allowing them to confirm and mark blocks as fast on any corresponding chain. The possible tradeoff here can be due to the interdependency of rollups. If one rollup is compromised, it will impact all the adjacent rollups. Also, cross-chain MEV will be a trouble in Asynchronous composability similar to the first option.&nbsp;</p> <p><strong>#3: Shared validity sequencing&nbsp;</strong></p> <p>Shared validity sequencing is an interoperability solution proposed by <a href="https://www.umbraresearch.xyz/writings/shared-validity-sequencing">Umbra Research</a> for superchain. This refers to a shared sequencer architecture supporting cross-chain interaction between OP chains. Following are the three main components upholding this sequencing design, including:</p> <ul><!-- wp:list-item --> <li>A mechanism for shared sequencer to support cross-chain interactions.</li> <!-- /wp:list-item --> <!-- wp:list-item --> <li>A block building algorithm in shared sequencer to manage cross-chain transactions while also respecting atomic transactions and conditional execution terms.&nbsp;</li> <!-- /wp:list-item --> <!-- wp:list-item --> <li>Shared fraud proofs for all the involved superchains to ensure guarantee for cross-chain transactions.</li> <!-- /wp:list-item --></ul> <p>Using above components, shared validity sequencing outlines two different systems; the atomic <strong><em>burn </em></strong>and <strong><em>mint </em></strong>method and generalization of&nbsp; this same method to offer cross-chain experience beyond burn &amp; mint. The first structure is based on system contracts, block building, and shared fraud proofs where <strong>burn </strong>on rollup A will only happen if <strong><em>mint on rollup B</em></strong><strong> </strong>succeeds<strong>.</strong></p> <p>Now, for generalization, this method can be easily modified to allow for passing of arbitrary messages and conditional transaction execution across OP rollups. Here, a cross-rollup action is invoked when all the triggered calls or none of them succeed.</p> <p>The challenge with this approach is the requirement for a shared sequencer to run full nodes for all the rollup it has done sequencing. Similarly, rollups also need to run nodes for cross-verification purposes. Doing this can be complex as well as expensive. Additionally, if an invalid state happens on a rollup, it will impact all its associated rollups.&nbsp;</p> <p><strong>#4: Zk Aggregation layer</strong></p> <p>The Zk Aggregation layer represents an interoperability concept similar to Polygon’s zk aggregation layer which requires the Superchain stack to transition over Zk-powered rollups. The Optimism ecosystem already has recognized the pace of zero-knowledge advancement and its rapid adoption, therefore now superchain is seeking to add zk-rollups in its stack soon. This will tackle the challenges of synchronous composability because verification and inclusion can be done seamlessly using zk-proofs. Also, ZK technology tackles the centralization issue of shared validity sequencing along with enabling fast finality.&nbsp;</p> <p>However, the cost will slightly increase for both dApp developers and users as there will be an aggregation layer sitting between the superchain-based rollup and the settlement layer. There is another concern for existing OP rollups who may struggle to meet the expectations of being permissionless which is a must to leverage the aggregation layer.&nbsp;</p> <p><strong>#5: Shared decentralized sequencer</strong></p> <p>Shared sequencer is one of the highly feasible solutions that match most of the interoperability requirements on OP superchain with almost zero trade offs. Having such sequencers means that superchains can offer a fully secure atomic inclusion &amp; exclusion through crypto-economic guarantees and meanwhile keeping the decentralization intact. Shared sequencers also contribute to better liveliness, security, and extremely fast finality in rollups via pre-confirmations. However, note that pre-confirmation requires re-staking which comes with its own set of challenges and cost add on because users need to pay for atomic execution guarantees.&nbsp;</p> <p><strong>#6: Based sequencing</strong></p> <p>Based sequencing or Layer-1 sequencing has emerged as a great solution to align OP rollups more towards Layer1 Ethereum, unlock higher decentralization while also seamlessly interoperability across them. One additional benefit of based sequencing is the liveliness and censorship inheritance from Layer1; the Layer1 proposers can also serve as proposers on the based sequencing network.&nbsp;</p> <p>Again, the cost here can be high due to superchain’s need to operate with all the other superchains, independent L2s outside the superchain ecosystem, as well as Ethereum itself. However, the final cost depends upon which all layers a user actually interacts with. Plus, this end-to-end interaction approach also leads to fast finality and finality guarantees to improve user experience on superchains. Learn more about based sequencing <a href="https://www.zeeve.io/blog/the-bold-promise-of-based-rollups-sequencing-pre-confirmations-mev-explained/">here</a>.</p>  <h2 class="wp-block-heading" id="h-launch-your-modular-op-stack-powered-chain-with-zeeve-raas">Launch your modular OP Stack Powered Chain with Zeeve RaaS</h2> <p>From our whole discussion around <a href="https://www.zeeve.io/appchains/optimistic-rollups/">OP Superchain</a> interoperability, it is evident that superchain will soon offer native interoperability through a best-suited approach. However, we strongly believe that OP stack rollups will still have the choice to leverage native interoperability or existing solutions. Knowing this,&nbsp; Zeeve <a href="https://www.zeeve.io/rollups/">Rollups-as-a-service platform</a> is offering a comprehensive OP Stack-specific stack for enterprises and web3 projects to launch modular OP rollup chains offering end-to-end interoperability, unified liquidity, and robust security. From one-click sandbox tool to decentralized shared sequencers,&nbsp; Alt DA layers, and MPC wallets– <a href="https://www.zeeve.io/rollups/">Zeeve RaaS</a> has <a href="https://www.zeeve.io/integrations/">40+ integration</a> add ons and the list is expanding constantly. So, if you are planning to launch an OP stack superchain, Zeeve Raas will help you to save significant cost and accelerate time-to-market. <a href="https://www.zeeve.io/talk-to-an-expert/">Connect with our web3 expert</a> to discuss your project requirements or get a quote instantly.&nbsp;</p>

zeeve

Magnesium Sulfate: Applications in Medicine and Agriculture

Magnesium Sulfate: A Useful Compound With Several Benefits Epsom salt, also known as magnesium...

https://dev.to/hersh_sannuttiuyh_40746d/magnesium-sulfate-applications-in-medicine-and-agriculture-4oo4

design

Magnesium Sulfate: A Useful Compound With Several Benefits Epsom salt, also known as magnesium sulfate is a naturally occurring compound made up of the elements magnesium sulfur and oxygen. Due to the wide variety of applications and reasons, this compound has become quite popular in medicine as well as agriculture. Benefits of Magnesium Sulfate The benefits of Magnesium Sulfate for plants and animals are vast due to its availability as a natural source of important nutrients such as magnesium, sulfur. It is an essential mineral that plays a pivotal role in different biochemical reactions of the body, and thereby aids in maintaining proper nerve function,muscute contraction as well has heart rhythm. On top of that, Magnesium Sulfate has also been proven to provide healing properties like helping with muscle cramps redution and relief from inflammation or relaxation. Top 5 Unique Uses of Magnesium Sulfate Magnesium Sulfate, though having been a common naturally occurring substance for hundreds of years is being looked at in a new light today due to the cutting edge research and utilization techniques that have evolved since its inception. Sometimes it is placed in hydrocultures (i.e. nutrient supplement when grown indoors). Furthermore, in the healthcare sector magnesium calcium chloride dihydrate sulfate is employed to address eclampsia; that is a life threatening situation during pregnancy distinguished through seizures. Safety With Magnesium Sulfate Magnesium Sulfate is deemed safe for use as long as it follows the directions of a professional but when misused can be dangerous. This means you should read and follow exactly what they are. Magnesium Sulfate should be taken by mouth only under the direction of a healthcare provider. Keep this material in cool, dry place being sealed and stored out of reach of children and pets to avoid accidents. Common Uses for Magnesium Sulfate Magnesium Sulfate can be used in various ways depending on intended use. In agriculture, it can be used as a fertilizer for plants and soils to trigger flora growths and help prevent certain diseases. Magnesium Sulfate can also be used in baths and massage oil, or may even be injected into the body under medical supervision for therapeutic effects. Magnesium Sulfate Ensuring Quality We Send You Magnesium Sulfate Ang Good Service What types of Magnesium Sulfate are available and how good is the quality? It is recommended to buy Magnesium Sulfate from reliable suppliers with the certificate of analysis in order for it to conform calcium chloride anhydrous quality. The multi-faceted appreciation of Magnesium Sulphate In Agriculture, Magnesium Sulfate is applied in fields as fertilizer and growth stimulant for plants. It is highly useful and versatile in the health care field helping to cure a variety of issues such as muscle cramps, constipation, skin problems. Final Thoughts on Magnesium Sulfate Overall, Magnesium Sulfate emerges as a very significant compound useful in agriculture and healthProcessEventicient. The natural magnesium bicarbonate sodium and sulfur content of Epsom salt, combined with its healing properties makes it a must-have. As technology and research advance, so do the innovative uses of Magnesium Sulfate, helping to build a healthier world that will last. Be safe handling Magnesium SulfateEasy win when be purchasingCarefully maximize its potential for the improvement of flora and faableOpacity

hersh_sannuttiuyh_40746d

Fetch vs Axios: Key Differences and Use Cases

When building web applications, making HTTP requests is a fundamental task. Two popular methods for...

https://dev.to/rahulvijayvergiya/fetch-vs-axios-key-differences-and-use-cases-jd5

javascript, webdev, react, angular

When building web applications, making HTTP requests is a fundamental task. Two popular methods for making these requests in JavaScript are the fetch API and the Axios library. This guide will compare fetch and Axios, highlighting their differences, strengths, and weaknesses. ## Overview of Fetch and Axios ### Fetch API: - **Built-in**: The fetch API is a modern, built-in JavaScript API for making network requests. It is part of the global window object in the browser and does not require any additional libraries, also with the recent release of NodeJS v17.0, it was added as an experimental feature and it now comes bundled with the latest LTS. - **Promise-based**: It returns promises, which makes it easier to work with asynchronous requests compared to older techniques like XMLHttpRequest. ### Axios: - **Third-party library**: Axios is a promise-based HTTP client for JavaScript, which can be used in both the browser and Node.js. - **Feature-rich**: Axios comes with a rich set of features out of the box, simplifying many tasks that require more effort with fetch. --- ## Key Differences Between Fetch and Axios ### 1. Syntax and Simplicity: Axios provides a cleaner and more concise syntax, especially for handling JSON responses and errors. - **Fetch:** ``` fetch('https://api.example.com/data') .then(response => response.json()) .then(data => console.log(data)) .catch(error => console.error('Error:', error)); ``` - **Axios:** ``` axios.get('https://api.example.com/data') .then(response => console.log(response.data)) .catch(error => console.error('Error:', error)); ``` --- ### 2. Error Handling: - **Fetch:** Only rejects a promise if a network error occurs. For other types of errors (e.g., HTTP status codes like 404 or 500), you need to manually check the response.ok property. ``` fetch('https://api.example.com/data') .then(response => { if (!response.ok) { throw new Error('Network response was not ok'); } return response.json(); }) .then(data => console.log(data)) .catch(error => console.error('Error:', error)); ``` - **Axios**: Automatically rejects the promise for any HTTP status code outside the range of 2xx. ``` axios.get('https://api.example.com/data') .then(response => console.log(response.data)) .catch(error => console.error('Error:', error)); ``` --- ### 3. Request and Response Interceptors: - **Fetch**: Does not support interceptors natively. You would need to manually handle this logic. - **Axios**: Supports request and response interceptors, allowing you to modify requests or handle responses globally. ``` axios.interceptors.request.use(config => { // Modify config before request is sent return config; }, error => { return Promise.reject(error); }); axios.interceptors.response.use(response => { // Modify response before handling it return response; }, error => { return Promise.reject(error); }); ``` --- ### 4. Default Timeout: - **Fetch**: Does not have a built-in timeout feature. You need to implement it manually using AbortController. ``` const controller = new AbortController(); const timeoutId = setTimeout(() => controller.abort(), 5000); fetch('https://api.example.com/data', { signal: controller.signal }) .then(response => response.json()) .then(data => console.log(data)) .catch(error => { if (error.name === 'AbortError') { console.error('Fetch request timed out'); } else { console.error('Fetch error:', error); } }); ``` - **Axios**: Supports setting a default timeout. ``` axios.get('https://api.example.com/data', { timeout: 5000 }) .then(response => console.log(response.data)) .catch(error => { if (error.code === 'ECONNABORTED') { console.error('Axios request timed out'); } else { console.error('Axios error:', error); } }); ``` --- ### 5. Automatic JSON Transformation: - **Fetch**: Requires manual transformation of JSON responses. ``` fetch('https://api.example.com/data') .then(response => response.json()) .then(data => console.log(data)); ``` - **Axios**: Automatically transforms JSON responses. ``` axios.get('https://api.example.com/data') .then(response => console.log(response.data)); ``` --- 6. Handling Query Parameters - **Fetch**: You need to manually append query parameters to the URL. ``` const params = new URLSearchParams({ key1: 'value1', key2: 'value2' }); fetch(`https://api.example.com/data?${params.toString()}`) .then(response => response.json()) .then(data => console.log(data)) .catch(error => console.error('Error:', error)); ``` - **Axios**: Axios has built-in support for query parameters. ``` axios.get('https://api.example.com/data', { params: { key1: 'value1', key2: 'value2' } }) .then(response => console.log(response.data)) .catch(error => console.error('Error:', error)); ``` --- ## Conclusion Both fetch and Axios are powerful tools for making HTTP requests in JavaScript, each with its own strengths and weaknesses. **Use Fetch if:** - You prefer using a built-in API without additional dependencies. - Your project needs to stay lightweight. - You are comfortable handling JSON transformation and error checking manually. **Use Axios if:** - You need a cleaner syntax and more readable code. - You want built-in support for request and response interceptors, timeout, and cancellation. - You prefer automatic JSON transformation and simpler error handling. Ultimately, the choice between fetch and Axios depends on your project's requirements and your personal or team's preferences. Both can effectively handle HTTP requests, but Axios offers more features and convenience, while fetch provides a more native and minimalistic approach.

rahulvijayvergiya

Enhancing Comfort and Style with Knitted Blankets

EXPLORE THE UNBELIEVABLE PERKS OF KNITTED THROW BLANKETS Do you need a cozy and stylish way to keep...

https://dev.to/hersh_sannuttiuyh_40746d/enhancing-comfort-and-style-with-knitted-blankets-mlg

design

EXPLORE THE UNBELIEVABLE PERKS OF KNITTED THROW BLANKETS Do you need a cozy and stylish way to keep warm during the cold winter nights or cool summer evenings? Look at Knit Blankets for example! Not only are these blankets a dream to cuddle up under, but they also offer many benefits of use an extra and some safety features that should include be happy in every house hold. Read on to learn how you can take your comfort and style well past that mark with the magic of knitted blankets. The Benefits of Knitted Blankets The most wonderful thing about knitted blankets: they are incredibly soft and pleasant to use. Knitted blankets are like no other and unlike its competition, fleece or cotton style of Cotton Knit Blanket they feel great on your skin due to the distinctive viscosity. Plus, they offer a sense of warmth and comfort you just can't get anywhere else - meaning these are the ideal throw blankets to snuggle up under on the couch or toss over your bed when it's chilly at night. Knitted Blankets Innovation One of the most attractive characteristics of knitted blankets is that you have total freedom to mold them as per your taste and style. There are a wide variety of colors and elaborate patterns that you can choose from to pick out the knitted blanket that really suits your specific style. Whatmore, a few knitted blanket suppliers like us offer you to customize the designs with your design that makes the whole one piece much unique simultaneously. Safety of Knitted Blankets Even better, like the cardigan and sweaters that made us envious to begin with, knitted blankets are created to be safe. Made from environment-friendly and toxic-free materials, these blankets contribute to an absolutely safe sleep. Also, they are less flammable compared to other types of blankets available in the market which is why you can buy and use setek blanket homeat your homes without any hesitation. Using Knitted Blankets knitted blankets are the simplicity and versability of how you can use them. Whether snuggled up on the sofa binge-watching a TV series or looking for warmth and comfort in bed, you simply wrap yourself inside the blanket and bask in its cozy embrace. Admittedly their practical use aside, Knitted Blanket can be an elegant addition to any decor by giving the space a twist of warmth. How to Use Knitted Blankets If you love your knitted blanket, it is important that you dedicate proper care for its upkeep. Machine wash in cold water, avoiding fabric softeners and bleach that can damage the fibers. When you do wash it make sure to lay the blanket flat for drying as hanging or placing them somewhere high up can distort its shape. Price vs Value of Knitted Blankets It is advisable that when you choose a knitted blanket, it should be from only renowned manufacturers because they are reputed to give awesome quality products and have better customer services. Find a more trustworthy source to purchase blankets crafted by expert artisans using top quality materials that are guaranteed for both durability and comfort. Moreover make sure the company provides lifetime or a sufficient warranty also return hassle-free giving you the confidence to buy. What are Knitted Blankets Used For When it comes to knitted blankets, they are versatile enough to be placed in bedrooms and living rooms or even patios. From the chilled northern nodes seeking solace or warmth, to desert oasis lounging somewhere on southern tropics needing just a light layer against their cool nights, knitted Wool Blanket coverlets simply provide. Plus, they work with many decorating styles - modern and rustic to name a few; traditional of course! In Conclusion While it may seem that knitted blankets are a great luxury, in reality there is nothing temporary or redundant about them they have been with us for tens of thousands of years and will remain part of our homes (we talk about keeping the body warm with reference to knitting first time). 8. The end benefitThis writing was written by kind permission from Kate Norse (%)What could be warmer than snuggling under an afghan when its zero outside? Given their unique appealing features that help beautify your place, the many benefits for safety reasons which they lead with and not to fail in mentioning how delightful they look - knitted blankets come out as an ideal pick to make different settings of solace at home. So why not go ahead and enjoy luxury at its best with Knitted Blankets? Take your pick, we are certain you won't be disappointed!

hersh_sannuttiuyh_40746d

I Published .SRT file parser package

srt-file-parser File parser for .srt (subtitle) file. It allows you to export the content...

https://dev.to/ahmetilhn/i-published-srt-file-parser-package-2h0e

javascript, react, vue, nextjs

# srt-file-parser File parser for .srt (subtitle) file. It allows you to export the content of your .srt file as a string or buffer and retrieve it as objects in the array. ### Installation _npm_ `npm install srt-file-parser` _yarn_ `yarn add srt-file-parser` ### Usage ```ts import srtFileParser from "srt-file-parser"; /** * {srtContent} string is srt file content */ const result: Array<BlockType> = srtFileParser(srtContent); result.forEach((item: BlockType) => { // }); ``` ### Types ```ts type CaptionBlockType = { id: string; start: number; // type of ms end: number; // type of ms text: string; }; ```

ahmetilhn

ResumeUp.AI

ResumeUp.AI - Free AI Resume Builder &amp; ATS Checker. Build the best resume in minutes with our...

https://dev.to/rohith_j/resumeupai-3007

resume, resumebuider, career, atschecker

[ResumeUp.AI](https://resumeup.ai/) - Free AI Resume Builder & ATS Checker. > Build the best resume in minutes with our Free AI Resume Builder! Get a powerful Resume Editor and an ATS Resume Checker to ensure your resume stands out! > 🚀 Introducing ResumeUp.AI - Your AI-Powered Resume Builder! 🌟   - AI Resume Builder: Create your resume based on your unique skills and experiences with AI powered builder and instant preview. - ATS-Friendly Templates: Choose from a range of ATS friendly resume templates that helps you get to the top of the pile. - Smart Resume Checker: Get your resume scored against industry standards—our AI will suggest actionable changes to boost your chances. - User-Friendly Design: Easy-to-use interface that makes resume building straightforward and fun. - Quick and Efficient: Create a professional resume in minutes, not hours! Join thousands of successful job seekers who've upgraded their resumes with ResumeUP.AI!

rohith_j

batdongsanvn

Bất động sản chính là một trong những lĩnh vực quan trọng và chiếm vị trí đặc biệt trong nền kinh tế...

https://dev.to/batdongsan688/batdongsanvn-20ek

Bất động sản chính là một trong những lĩnh vực quan trọng và chiếm vị trí đặc biệt trong nền kinh tế của một quốc gia, ảnh hưởng trực tiếp đến các thị trường khác như tiền tệ hay lao động. Việc đầu tư và kinh doanh bất động sản không chỉ góp phần vào ngân sách quốc gia mà còn chiếm tỷ trọng đáng kể trong sản phẩm nội địa. Tuy nhiên, việc phát triển thị trường bất động sản tại Việt Nam hiện nay vẫn còn nhiều hạn chế và vướng mắc, cần có những giải pháp cải thiện để giúp thị trường phát triển ổn định và bền vững trong tương lai. Theo Báo cáo chỉ số tâm lý người tiêu dùng BĐS Việt Nam năm 2022, khoảng 92% người Việt muốn sở hữu thêm bất động sản. Nhu cầu này luôn rất cao vì từ lâu, bất động sản được xem là loại đầu tư sinh lời cao, an toàn và mang tính tâm lý muốn sở hữu đất đai. Tuy nhiên, một thực tế đáng lưu ý là giá bất động sản ở các thành phố lớn như Hà Nội, TP. Hồ Chí Minh đang ở mức khá cao. Hiện nay, vẫn còn một số bất cập trên thị trường bất động sản cần được giải quyết. Xem thêm tại: https://batdongsan.vn/

batdongsan688

Experience the Art of Photography with Ravyacinematic Production House

Introduction Welcome to Ravyacinematic Production House, a premier destination for unparalleled...

https://dev.to/tech_katori_299c373865466/experience-the-art-of-photography-with-ravyacinematic-production-house-1k0h

videoproduction, photography

**Introduction** Welcome to Ravyacinematic Production House, a premier destination for unparalleled photography and video production services in Delhi, Gurgaon, and Noida. Our studio is a haven for creativity and innovation, dedicated to delivering exceptional quality in fashion photography, commercial corporate shoots, and cinematic video production. Whether you are looking for a striking modeling portfolio, captivating product photography, or a comprehensive real estate shoot, we have the expertise to bring your vision to life. ## Our Services **Fashion Photography** Our **[fashion photography](https://ravyacinematichouse.com/photography/)** services are designed to capture the essence of style and elegance. We work closely with models, designers, and fashion brands to create stunning visual narratives that stand out. Our portfolio includes editorial shoots, lookbooks, and fashion campaigns that highlight the latest trends and timeless classics. **Modelling Portfolio** A strong modeling portfolio is essential for making a lasting impression in the competitive fashion industry. Our team of experienced photographers and stylists ensures that each portfolio we create showcases the model's unique personality and versatility. From headshots to full-length portraits, we provide a comprehensive range of services to help models launch their careers. **Portrait Photography** Portrait photography is all about capturing the true essence of a person. At Ravyacinematic Production House, we specialize in creating beautiful, natural portraits that reflect the subject's individuality. Whether you need a professional headshot or a family portrait, we offer personalized sessions that cater to your specific needs. **Product Photography** In the world of e-commerce and advertising, high-quality product photography is crucial. Our team excels at creating visually appealing images that highlight the features and benefits of your products. From small items like jewelry to larger products like furniture, we ensure that every detail is captured with precision. **Real Estate Shoot** **[Real estate](https://ravyacinematichouse.com/corporate-film/)** photography requires a keen eye for detail and an understanding of architectural aesthetics. Our photographers are skilled at capturing the beauty and functionality of residential and commercial properties. We provide a range of services, including interior and exterior shots, virtual tours, and drone photography, to help you showcase your property in the best light. **Corporate Films** Corporate films are an effective way to communicate your brand's message and values. We produce high-quality corporate videos that engage and inform your audience. Our services include promotional videos, training videos, and company profiles that are tailored to meet your specific objectives. **Explainer Videos** Explainer videos are a powerful tool for simplifying complex ideas and engaging your audience. We create compelling animated and live-action explainer videos that effectively convey your message. Whether you need a product demo, a how-to guide, or an educational video, we have the skills and creativity to deliver outstanding results. **Testimonial Videos** Customer testimonials are a great way to build trust and credibility. Our testimonial videos capture genuine customer experiences and highlight the benefits of your products or services. We work closely with clients to ensure that each testimonial video is authentic and impactful. **Event Coverage** From corporate events to social gatherings, we provide comprehensive event coverage that captures the essence of your special occasion. Our team is experienced in covering a wide range of events, including conferences, seminars, and product launches. We ensure that every important moment is documented in high-quality photos and videos. **2D & 3D Animations** Animations are a versatile and engaging way to tell your story. Our animation services include **[2D and 3D animations](https://ravyacinematichouse.com/2d-3d-animations/)** that bring your ideas to life. Whether you need an animated logo, a character animation, or a complex visual effect, we have the expertise to create stunning animations that captivate your audience. ## Why Choose Us? **Unparalleled Excellence** At Ravyacinematic Production House, we are committed to excellence in every project we undertake. Our team of experts combines creativity, technical skill, and cutting-edge technology to deliver outstanding results. We take the time to understand our clients' goals and create customized solutions that align with their brand identity and target audience. **Creativity and Tailored Solutions** We believe that every project is unique, and we offer tailored solutions to meet your specific needs. Our team works closely with clients to develop creative concepts and execute them with precision. Whether you need a corporate video, a social impact film, or a social media promo, we have the creativity and expertise to exceed your expectations. **Collaborative Partnership** Building a strong, collaborative partnership with our clients is at the heart of what we do. We value your input and involvement throughout the process, ensuring that your vision is realized. Our goal is to create a final product that not only meets but exceeds your expectations. **Timely Delivery** In today's fast-paced business environment, timely delivery is crucial. We pride ourselves on our efficient workflows and commitment to deadlines. You can rely on us to deliver your videos, photos, and animations on schedule without compromising on quality. **FAQs** **How can I get started with Ravyacinematic Production House?** Getting started is easy. Visit our website and navigate to the "Contact" page. Fill out the form with your name, contact information, and a brief description of your project. One of our team members will get in touch with you to discuss your project in more detail and provide a personalized quote. **Can I see examples of Ravyacinematic Production House's previous work?** Absolutely! We have a dedicated portfolio section on our website where you can browse through some of our past projects. Our portfolio showcases the quality and creativity we bring to every project. Feel free to explore and get a sense of our style and capabilities. **How long does it typically take to complete a project with Ravyacinematic Production House?** The timeline for project completion varies depending on the scope and complexity of the project. During the initial consultation, we will discuss your requirements and provide a timeline estimate. We are committed to meeting deadlines and will work closely with you to ensure timely delivery. **What equipment and technology does Ravyacinematic Production House utilize?** We use the latest industry-standard equipment and technology to deliver high-quality results. Our team utilizes professional-grade cameras, lenses, lighting equipment, and audio recording devices. We also use state-of-the-art post-production software and hardware for editing, color grading, visual effects, and sound design. **What are the pricing options for Ravyacinematic Production House's services?** Our pricing is determined based on the specific requirements of your project. Factors such as scope, duration, complexity, and additional services needed are considered when providing a quote. We strive to offer competitive pricing while maintaining the highest quality standards. During the initial consultation, we will discuss your budget and provide a transparent and customized pricing structure. **Conclusion** **[Ravyacinematic Production House](https://ravyacinematichouse.com/)** is dedicated to providing top-notch photography and video production services that exceed client expectations. Our commitment to excellence, creativity, and timely delivery makes us the perfect partner for your visual storytelling needs. Explore our website to learn more about our services and get in touch with us to start your next project. Together, let's create something extraordinary.

tech_katori_299c373865466

CLR

Clr haqida Common Language Runtime(CLR) .NET dasturlarining ishlash jarayonini boshqaradi. O'z...

https://dev.to/shoxjaxon1202/clr-4a13

dotnet, clr, dotnetframework, dotnetcore

**Clr haqida** Common Language Runtime(CLR) .NET dasturlarining ishlash jarayonini boshqaradi. O'z vaqtida kompilyator kompilyatsiya qilingan codeni yani (MSIL) codeni mashina codega ( 0 va 1 larga) kompilyatsiya qiladi. CLR tomonidan taqdim etiladigan xizmatlar xotirani boshqarish, xatoliklar bilan ishlash, xavfsizlik va boshqalarni o'z ichiga oladi. **Common Language Runtime(CLR)ni to’liqroq tushuntiradigan bo’lsam:** CLR .NET ning asosiy komponentidir. Bu codelarni boshqaradigan va turli xizmatlarni taqdim etish orqali ishlab chiqish jarayonini osonlashtirishga yordam beradigan .NET runtime muhitidir. Asosan, u har qanday .NET dasturlash tilidan qat'iy nazar .NET dasturlari bajarilishini boshqarish uchun javobgardir. Common Language Runtime ostida ishlaydigan code boshqariladigan code deb ataladi. Boshqacha qilib aytganda, CLR .NET uchun boshqariladigan runtime muhitini ta'minlaydi, deb ayta olamiz.  **C# dasturini Run qilishda CLR ning roli.** Faraz qilaylik, siz C# dasturini yozdingiz va uni program deb nomlanuvchi faylga saqladingiz. Tilga xos kompilyator manba codeini metama'lumotlari bilan birga CIL (Common Intermediate Language) yoki IL (Intermediate Language) deb ham ataladigan MSIL (Microsoft Intermediate Language) ga kompilyatsiya qiladi. Endi CLR ning navbati. CLR MSIL codega xizmatlar va runtime ish muhitini taqdim etadi. Ichki CLR MSIL codeni keyinchalik protsessor tomonidan bajariladigan mashina codega aylantiruvchi JIT (Just-In-Time) kompilyatorini o'z ichiga oladi. CLR MSIL codeini boshqaradigan dasturlash tili, muhiti, versiyasi va classlari haqida ma'lumot beradi. CLR keng tarqalgan bo'lgani uchun u boshqa tilda yozilgan classga boshqa tilda yozilgan classni ulash imkonini beradi. ****Boshqa manba**** Asosiy xususiyatlar: CLR .NET platformasida yozilgan boshqariladigan ilovalar uchun ish vaqti muhitini taqdim etadi. U kodning bajarilishini boshqaradi, kod xavfsizligini, xotirani boshqarishni va dastur bajarilishining boshqa jihatlarini ta'minlaydi. **Xotirani boshqarish**: CLR avtomatik xotira boshqaruvidan foydalanadi, bu esa ishlab chiquvchilarning xotirani aniq ajratish va ajratish zaruratini yo'q qiladi. **Mavzuni boshqarish**: CLR bajarilish iplarini boshqarish, shu jumladan umumiy ma'lumotlarga kirishni sinxronlashtirish uchun imkoniyatlarni taqdim etadi. **Tur xavfsizligi**: CLR ma'lumotlar turlaridan noto'g'ri foydalanish bilan bog'liq ko'plab ish vaqtidagi xatolarning oldini olishga yordam beradigan tip xavfsizligini ta'minlaydi. **Bir nechta tilni qo'llab-quvvatlash**: CLR O'rta til (IL) ga kompilyatsiya qilingan bir nechta dasturlash tillarini qo'llab-quvvatlaydi, bu ishlab chiquvchilarga bir xil dastur yoki loyiha doirasida bir nechta tillardan foydalanishga imkon beradi. **.NET Framework bilan integratsiya**: CLR .NET Frameworkning asosiy qismi boʻlib, .NET tarkibiga kiritilgan turli tillarda yozilgan komponentlarning oʻzaro ishlashini taʼminlaydi. CLR apparat va operatsion tizimdan yuqori darajadagi abstraktsiyani ta'minlash orqali .NET ilovalarini ishlab chiqishni sezilarli darajada soddalashtiradi, bu esa ishlab chiquvchilarga resurs va platformalarni boshqarish tafsilotlariga emas, balki dastur mantig'iga e'tibor qaratishga imkon beradi.

shoxjaxon1202

React JSX

A post by Aadarsh Kunwar

https://dev.to/aadarshk7/react-jsx-7m8

react

aadarshk7

PVC Powder Processing: From Mixing to Molding

A look into the intriguing realm of PVC powder processing Did you ever stop to think about the magic...

https://dev.to/mona_mallarynjuy_8bdd53b/pvc-powder-processing-from-mixing-to-molding-2nfl

design

A look into the intriguing realm of PVC powder processing Did you ever stop to think about the magic that goes into making plastic toys, and utensils? The whole journey starts with an amazing process known as PVC powder processing! So grab a chair and let us walk you through this amazing interaction of combining & blending leading to high-quality plastic solutions with ease. Exploring More Advantages in PVC Powder Processing So before we go deep into the details of what goes on in PVC powder processing, here are some good benefits derived from Using it This is a ground-breaking technique when it comes to producing plastics, thanks to being cost-efficient and fast which allows for one of the highest productivities with respect to other ways of making plastic. The resultant final products are of pvc resin premium quality, higher strength and excellent weathering & chemical resistance. On the other hand, PVC powder processing will have a better performance as eco-friendly and energy-saving which has less consumption of resources and fewer waste emissions compared to traditional plastic manufacturing methods. Why the Innovation of PVC Powder Pressure Processing was Released Introduction PVC powder has come a long way since it was first produced by suspension polymerization in the 1930s. A lot of R&D has since perfected the process and now allowed for allowing even more new / better mixing & molding methodsensus. However, this has evolved with the adoption of advanced technology like computer-aided design (CAD) and 3D printing into PVC powder processing creating a world full of endless possibilities. It has completely transformed the industry and opened up a new era of high technology resulting in pathbreaking products like flexible PVC films for window insulation as well as food packaging. Top Safety Concerns in PVC Powder Processing In any production process, first of all for safety reasons, and the sale of PVC powder treatment do less than this. The key step is mixing and molding, it turned out that there was no toxicity of the PVC powder itself. The wearing of sturdy work gloves, breathing masks and other PPE dependent upon safety protocols is essential. In addition, ventilating PVC powder processing facilities properly and training workers thoroughly in safe handling procedures is a must. Breaking Down the Raw Materials for PVC Powder Processers Interested in How PVC Powder Processing Works The process starts with the thorough mixing of PVC resin powder with additives such as plasticizers, lubricants and stabilizer. The concoction is then heated and stirred until it just liquifies into a molten mass. After that, a molding machine is used to cool and shape the molten PVC liquid into what you see in the picture above. At the end of this process, all surplus material is eliminated and special textures or colors are added to improve its aesthetic appeal. Advancing the Level of Service Standards in PVC Powder Handling Excellence is synonymous with any industry that can offer a great, if not exemplary service and the processing from PVC powder to products via extrusion moulding is no different. PVC powder processing enterprises become a solid quality system because customers want good flexible polyvinyl chloride products, and that is normal. These are companies filled with capable staffs, and modern machines alongside an unadulterated commitment when it comes to quality control. Variety of Applications of PVC Powder Processing In this case, the applications of PVC powder processing are really wide for different industries when one decides to dig into the huge range. PVC is widely utilized in construction for producing window frames, pipes and fittings. Automotive sector uses PVC in making several interior and exterior parts, whereas medical domain depends on manufacturing essentials like tubing and catheters including blood bags from it. And although pvc continues to be often used for making a variety of common household polyvinyl chloride resin products as well, including toys and kitchen utensils or imitation leather. Eventually, PVC powder processing becomes one of an integral backbone in the area pf plastic production because its efficiency and cost efficient attribute that can be used for almost all product lines. With safety and quality as part of its guiding principles, processors involved in PVC powder processing companies strive to offer service excellence that is imperative for their demanding clients. With PVC powder processing enabling limitless creativity, the future has plenty more surprises on offering in this segment moving forward.

mona_mallarynjuy_8bdd53b

Integration Testing: The Key to Seamless Application Interoperability

In the fast-paced world of today’s industry, efficiency is an ultimate goal. The need for a quicker...

https://wordstreetjournal.com/integration-testing-the-key-to-seamless-application-interoperability/

integration, testing

 In the fast-paced world of today’s industry, efficiency is an ultimate goal. The need for a quicker delivery and better quality is growing, thus it’s critical to optimize workflows and processes. Among the potent remedies that can unleash productivity is automated integrated testing. Organizations can transform their workflows and increase productivity by decreasing errors, saving time, and optimizing workflows by implementing this strategy. **Embracing Automation** If companies want to stay competitive in today’s digital age, adopting automation is essential. By automating routine, repetitive processes, businesses can then reallocate valuable resources such as staff time and effort to higher-value, strategic initiatives that drive innovation and growth. This idea is furthered by automated integrated testing, which smoothly incorporates thorough system checks into the software development lifecycle. Applying this automation not only improves production and efficiency, but also customer satisfaction, product quality and ultimately profitability. During the digital economy era, enterprises had to quickly adopt an automated approach in order to deliver products at market speed, streamline procedures and be competitive. **Faster Time-to-Market** The capacity of automated integrated testing to shorten the time it takes for new goods or services to reach the market is among its biggest benefits. Manual testing procedures can be time-consuming and prone to mistakes made by humans, which can cause delays and possible quality problems. Automated testing streamlines the entire process, enabling businesses to find and fix errors early on, reducing the need for expensive rework, and guaranteeing a faster release cycle. **Comprehensive Testing Coverage** Conventional testing techniques frequently fail to provide thorough coverage, hiding gaps and potential risks. Conversely, automated integrated testing guarantees that all system components, from individual parts to entire workflows, are adequately tested. Organizations may validate intricate interactions, imitate real-world scenarios, and spot any problems before they affect end users by utilizing sophisticated testing tools and frameworks. **Continuous Improvement** The benefit of automated integrated testing is that it can change and adapt over time. The testing framework is easily updated to reflect changes in systems and procedures over time, ensuring that the testing is still applicable and efficient. This cycle of continuous improvement not only raises the standard of the product or service overall but also cultivates an iterative refinement culture inside the company. **Improved Collaboration and Communication** Cross-functional teams that use automated integrated testing are more likely to collaborate and communicate effectively. Organizations can create a common understanding of requirements, priorities, and quality standards by bringing in stakeholders from several departments, including operations, development, and quality assurance. This cooperative strategy encourages openness, reduces misunderstandings, and streamlines operations. **Conclusion** Automated integrated testing is a powerful strategy for achieving seamless application interoperability. Opkey simplifies automated integrated testing across several applications and systems. It discovers existing tests in logs and identifies coverage gaps to provide a full perspective. One-click creation boosts coverage without the need to code new tests. The no-code builder enables anyone to create complicated integrated tests by connecting application flows. Impact analysis provides proactive alerts on impacted tests prior to production deployment. Self-healing technology ensures that integrated tests remain robust even when applications change. Collaboration takes place directly on Opkey’s platform, and automatic reporting ensures traceability across the entire test suite.

rohitbhandari102

Maximizing Your Business Potential: How an iPhone App Development Agency Can Transform Your Digital Strategy

In today's digital age, having a strong presence on mobile platforms is crucial for businesses aiming...

https://dev.to/sejaljansari/maximizing-your-business-potential-how-an-iphone-app-development-agency-can-transform-your-digital-strategy-4ki

In today's digital age, having a strong presence on mobile platforms is crucial for businesses aiming to reach and engage with their target audience effectively. With millions of users worldwide, iOS devices, particularly iPhones, represent a significant market opportunity. Developing a high-quality iPhone app tailored to your business needs can not only enhance customer experience but also boost brand visibility and revenue. This is where partnering with an iPhone app development agency can make a substantial difference. Let’s explore how such an agency can transform your digital strategy and maximize your business potential. **The Power of iPhone Apps in Business** **Accessibility and Engagement** iPhone apps offer unparalleled accessibility, allowing users to interact with your brand anytime, anywhere. This level of accessibility enhances customer engagement and satisfaction, as users can access information, make purchases, and interact with services effortlessly. **Brand Visibility and Recognition** Having a well-designed iPhone app can significantly enhance your brand's visibility and recognition. It serves as a constant reminder of your brand's presence on users' devices, fostering brand loyalty and increasing the likelihood of repeat business. **Revenue Generation** iPhone apps present various revenue opportunities, such as in-app purchases, subscriptions, and advertising. By providing a seamless and enjoyable user experience, you can maximize these revenue streams and drive business growth. **How an iPhone App Development Agency Can Help** **Expertise and Experience** An i[Phone app development company](https://www.nimblechapps.com/services/ios-app-development-company) brings specialized expertise and experience to the table. They have a deep understanding of iOS development guidelines, best practices, and the latest trends, ensuring that your app is not only functional but also aesthetically pleasing and user-friendly. **Customized Solutions** Every business is unique, and so are its app requirements. An experienced development agency will work closely with you to understand your business goals, target audience, and specific needs. They will tailor a customized app solution that aligns with your brand identity and delivers value to your customers. **End-to-End Services** From concept ideation to app design, development, testing, and deployment, an iPhone app development agency provides comprehensive end-to-end services. They handle all aspects of app development, allowing you to focus on your core business activities while ensuring a smooth and successful app launch. **Quality Assurance** Ensuring the quality and performance of your iPhone app is paramount. A reputable development agency conducts rigorous testing and quality assurance processes to identify and resolve any issues before the app goes live. This results in a polished and reliable app that meets the highest standards. **Ongoing Support and Maintenance** The relationship with an iPhone app development agency doesn’t end with app deployment. They offer ongoing support, updates, and maintenance services to ensure that your app remains optimized, secure, and compatible with future iOS updates. This proactive approach helps in maintaining customer satisfaction and maximizing app longevity. Case Studies: Success Stories with iPhone App Development Agencies** ** **Example 1: Retail App Transformation** A retail business partnered with an [iPhone app development company](https://www.nimblechapps.com/services/ios-app-development-company) to create a mobile shopping app. The agency implemented intuitive navigation, personalized recommendations, and seamless checkout features, resulting in increased sales and customer retention. **Example 2: Service Industry Innovation** A service-based company collaborated with an iPhone app development agency to develop a service booking app. The agency integrated real-time scheduling, secure payment options, and customer feedback mechanisms, leading to improved operational efficiency and customer satisfaction. **Example 3: Educational App Revolution** An educational institution worked with an iPhone app development agency to launch a learning app for students. The agency designed interactive lessons, progress tracking tools, and collaboration features, enhancing student engagement and academic performance. **Conclusion** Incorporating an iPhone app into your digital strategy can unlock new opportunities for growth, customer engagement, and revenue generation. By partnering with a specialized iPhone app development agency, you can leverage their expertise, creativity, and technical proficiency to create a standout app that resonates with your audience and aligns with your business objectives. Whether you're looking to enhance brand visibility, improve customer experience, or increase operational efficiency, investing in an iPhone app development agency is a strategic decision that can propel your business towards success in the competitive digital landscape.

sejaljansari

The Future of Fueling: DC Fast Charging Stations Transforming EV Travel

Next-Gen Fill-ups: How DC Fast-Charging Stations Could Empower the Era of EV Tourism The modern...

https://dev.to/matthaeus_correlluyrf_5e/the-future-of-fueling-dc-fast-charging-stations-transforming-ev-travel-3c5p

Next-Gen Fill-ups: How DC Fast-Charging Stations Could Empower the Era of EV Tourism The modern world is waking up and using more cleaner solutions to address problems with air pollution. Among these a very popular solution about which people are often taking is the Electric Vehicles (EVs) and we would love to take the same into considerations. They are renowned for low emissions to make it an environment-friendly of transportation. Charging their cars fully, however, is one of the main things electric vehicle owners worry about. It used to take several hours traditionally, which could be seen as being a little inconvenient for longer journeys. Now, however, the future of EV travel appears brighter than ever with the DC fast charging stations beginning to dot our superhighway system. Benefits of DC Fast Charging Stations dc fast charging stations are a lot more powerful and useful than Level 2 charging, the next fastest type of charger that can requite many hours to bring an EV back up to full; DC chargers offer hundreds of miles' worth in just half as time at most. The resulting vehicles will be able to recharge at these stations in 30 minutes for an 80% top-up. So there is no more need for drivers to sit and wait hours while their batteries are charged. There can then take a quick stop while traveling, eat something from the grab and go invery feet of a retail chain or typically charge their electric car. This not only decreases the travel time but also introduces a level of luxury never experienced before. Improving DC Fast Charging Stations With Innovation DC ev fast charging station gradually progress to a more practical, personal experience as the world moves with them. The idea is that newer technologies and features are being added to bolster the charging experience further. Vehicle-to-Grid (V2G) technology is one such innovation that has garnered a lot of attention. Because this state-of-the-art technology allows electric college buses to feed power back in to the grid when they are plugged into a dc charging station. This is not only good for the car owner, but also helps in decreasing energy costs at home and offices. Contains Safety Features of DC Fast Charging Stations Operating DC fast charging ev station is just as important as operating any electrical device. Not only the stations have a number of safety features to protect your home from potential hazards, such as the Automatic Ground Fault Circuit Interrupter (AFCI) and Overcurrent Protection Devices (OCPD). These features will avoid any risk of electrical hazard such as arcing and a short circuit. Further, DC fast charging stations meet stringent international safety standards to make certain the vehicle is not only charged quickly and reliably but safely. Fast charging stations Although the technology is pretty advanced, it turns out they are very simple to use and operate from a user standpoint. The first thing that needs to be done is finding a nearby charging station, and this can normally be facilitated through an app used by many networks. When you pull up to the station all you have todo is plug in your car and follow insructions on how to start charging It's as easy as that! Quality Service Charging networks are more than only a place to charge your vehicle; the same number include several services and quality items that upgrade EV ownership. By utilizing online platforms, you can monitor the status of your charge and also receive an instant update on what time your car will be completely charged. Many offer partnerships with businesses such as restaurants and grocery stores who allow you to charge your car while also eating or shopping. DC Fast Charging Station Applications Clearly the potential applications for DC fast charging stations are broad and varied. These stations could also change how energy is consumed in homes and businesses, not only moving cars. By using V2G technology, electric vehicles can help solve electricity problems for homes and businesses by reducing charges to your energy costs whilst decreasing carbon emissions. In addition, the ongoing build-out of DC charging infrastructure will bring long distance travel and cross-country transport using electric cars to unprecedented new levels.

matthaeus_correlluyrf_5e

How to Batch Notifications Across Users in a Dedicated Time Window? w/ Example Github Application

Batching notifications is a feature widely adopted by major social media platforms and collaborative...

https://dev.to/suprsend/how-to-batch-notifications-across-users-in-a-dedicated-time-window-w-example-github-application-2p3k

javascript, tutorial, programming, react

[Batching notifications](https://www.suprsend.com/post/how-to-batch-notifications-for-your-social-media-collaborative-application) is a feature widely adopted by major social media platforms and collaborative tools like LinkedIn, MS Teams, and Google Workspace products. This technique consolidates multiple alerts into a concise summary within a single notification, creating a clutter-free user experience and reducing interruptions.  --- For hands-on implementation, please refer to the provided GitHub repository and deployed application links: - GitHub: [SuprSend Social App](https://github.com/SuprSend-NotificationAPI/social-app-react-app-inbox) - Deployed Application: [SuprSend Demo](https://suprsend-notificationapi.github.io/social-app-react-app-inbox/) --- ### Benefits of Batching Notifications Frequent alerts can lead to notification fatigue, causing users to disengage. By batching notifications, we can maintain user attention and promote sustained interaction with our platform. ### Technical Overview: How Batching Works Batching notifications requires sophisticated workflows and significant development resources. Here's a closer look at the technical aspects: 1. **Aggregation Engine**: - Efficiently aggregates related notifications, such as likes, shares, and comments, based on metadata attributes. - Example: Instagram separates notifications for story likes and comments, ensuring clarity. 2. **Batching Window**: - The batching window can be fixed (e.g., every 30 minutes) or dynamic (e.g., user-specific intervals). - Example: LinkedIn batches email alerts for new messages every 30 minutes, while Google Docs batches comments based on user activity. 3. **Scheduling**: - Determines the optimal time for delivering notifications, which could be immediately, at the end of a batching window, or at a strategic time. - Example: SaaS companies often send a daily digest of activities the following morning. 4. **Batched Message Presentation**: - Options range from simple counters to detailed summaries, balancing informativeness and engagement without overwhelming the user. - Example: "Patrick and 3 others liked your photo" versus listing all activities. 5. **Cancelling Aggregation**: - Adjusts the aggregation counter for counter-activities within the batching window. - Example: If a user likes and then unlikes a post within the batching window, the counter is adjusted accordingly. ### Practical Implementation Using SuprSend #### Pre-requisites: - Account on [SuprSend](https://www.suprsend.com/) - Integration of [SuprSend SDK](https://docs.suprsend.com/docs) in your project - Successful [event calls made to SuprSend](https://docs.suprsend.com/reference/event-api) with necessary details  #### Steps to Implement Batching: 1. **Identifying Triggers**: - Identify recurring events suitable for batching. - Example: Trigger a `Like_Event` whenever someone likes a post in a React application using SuprSend's JavaScript SDK.  2. **Setting Up Batch Parameters**: - Use SuprSend’s workflow builder to configure batching. - Define batch window (fixed or dynamic), batch key (e.g., userName), and retain batch events (e.g., 15 objects).  This is the code I am using to send the event to SuprSend.   3. **Creating Templates for Batched Events**: - Use SuprSend’s template editor and Handlebar Helpers to format notifications based on the batched event count.  - Example Template that I used for this demo application using handlebars: ``` {{#compare $batched_events_count '>' 1}} {{ $batched_events.[0].username }} and {{ subtract $batched_events_count 1 }} others liked your post. {{else}} {{ $batched_events.[0].username }} liked your post. {{/compare}} ``` The final result would look like this:  ### Beyond Batching: Implementing Throttling While batching reduces the total number of notifications, introducing throttling can further enhance user experience by limiting the frequency of notifications. By setting an upper limit on daily notifications, we ensure users are not overwhelmed even with multiple batches. --- For hands-on implementation, please refer to the provided GitHub repository and deployed application links: - GitHub: [SuprSend Social App](https://github.com/SuprSend-NotificationAPI/social-app-react-app-inbox) - Deployed Application: [SuprSend Demo](https://suprsend-notificationapi.github.io/social-app-react-app-inbox/) --- Incase you want to check out the Javascript SDK, you can head here: https://docs.suprsend.com/docs/javascript-sdk

nikl

Serverless vs. Traditional Hosting

Serverless vs. Traditional Hosting Hosting a web application involves choosing the right...

https://dev.to/sh20raj/serverless-vs-traditional-hosting-2ckc

hosting, webdev, javascript, beginners

## Serverless vs. Traditional Hosting Hosting a web application involves choosing the right infrastructure to meet your application's needs while managing costs effectively. Two popular approaches are serverless hosting and traditional hosting. This article will explore both options, comparing their costs, benefits, and drawbacks, to help you decide which is best for your project. {% youtube https://youtu.be/f8fP8BIEHjM?si=LGoGhuWFw6ANLzUd %} ### What is Serverless Hosting? **Serverless hosting** allows you to run your code without provisioning or managing servers. The cloud provider automatically scales the infrastructure and only charges you for the actual compute time your application consumes. #### Key Features: - **Auto-Scaling**: Automatically adjusts the resources based on the load. - **Pay-per-Use**: Charges are based on the actual usage rather than pre-allocated capacity. - **No Server Management**: The provider handles all server maintenance and scaling. #### Pros: 1. **Cost-Effective for Variable Traffic**: Ideal for applications with unpredictable traffic patterns. 2. **Reduced Management Overhead**: No need to manage or maintain servers. 3. **Scalability**: Automatically scales up or down based on demand. #### Cons: 1. **Cold Starts**: Initial request latency when functions are not frequently invoked. 2. **Complex Pricing**: Costs can be unpredictable due to variable usage. ### Examples of Serverless Providers: - **AWS Lambda**: Offers a generous free tier and charges $0.20 per 1 million requests plus $0.00001667 per GB-second of compute time. - **Google Cloud Functions**: Free tier includes 2 million invocations per month, with $0.40 per million invocations and $0.0000025 per GB-second for additional usage. - **Azure Functions**: Similar pricing model with slight variations in cost per execution and compute time. ### What is Traditional Hosting? **Traditional hosting** involves renting server space from a provider and managing the server environment yourself. This can range from shared hosting, where multiple applications share the same server, to dedicated servers or virtual private servers (VPS) that offer isolated environments. #### Key Features: - **Fixed Pricing**: Monthly or yearly pricing plans with predictable costs. - **Full Control**: Greater control over server configurations and optimizations. - **Consistency**: No cold starts or latency issues due to inactive functions. #### Pros: 1. **Predictable Costs**: Easier to budget with fixed pricing. 2. **Full Control**: Ability to customize and optimize server environments. 3. **No Cold Starts**: Consistent performance without startup delays. #### Cons: 1. **Resource Over-Provisioning**: May pay for unused resources. 2. **Maintenance Responsibility**: Responsible for server maintenance, updates, and security. ### Examples of Traditional Hosting Providers: - **DigitalOcean**: Basic droplets start at $4 per month for 1 GB RAM and 25 GB SSD storage. - **AWS EC2**: On-demand pricing for a t3.micro instance starts at approximately $8 per month. - **Hostinger**: Shared hosting plans start at $2.99 per month. ### Cost Comparison To illustrate the cost differences, let's consider two scenarios: a low to medium traffic application and a consistently high traffic application. #### Scenario 1: Low to Medium Traffic For applications with variable traffic that experiences occasional spikes, serverless hosting can be more cost-effective. Here's a rough cost estimation: - **AWS Lambda**: If your application uses 1 million requests and 500,000 GB-seconds per month, the cost would be around $7. - **DigitalOcean**: A basic droplet costing $4 per month may be underutilized during low traffic periods, resulting in higher effective costs.  #### Scenario 2: Consistently High Traffic For applications with stable and high traffic, traditional hosting might be cheaper due to fixed pricing: - **AWS EC2**: A reserved t3.medium instance costs approximately $30 per month, suitable for high traffic with predictable performance. - **Hostinger**: Higher-tier plans offer more resources and better performance at around $29.99 per month. ### Conclusion Choosing between serverless and traditional hosting depends on your application's specific needs and usage patterns. Here's a quick summary: - **Serverless Hosting**: Best for applications with variable or unpredictable traffic, offering cost savings and reduced management overhead. - **Traditional Hosting**: Ideal for consistently high traffic applications that require predictable costs and full control over the server environment. By understanding the benefits and drawbacks of each approach, you can make an informed decision that balances cost and performance for your Node.js/Next.js application. For more detailed comparisons and up-to-date pricing, refer to the respective provider's website or consult their documentation. --- ### Sources - [AWS Lambda Pricing](https://aws.amazon.com/lambda/pricing/) - [Google Cloud Functions Pricing](https://cloud.google.com/functions/pricing) - [DigitalOcean Droplets Pricing](https://www.digitalocean.com/pricing/) - [Hostinger Shared Hosting Pricing](https://www.hostinger.com/web-hosting) - [Serverless vs. Traditional Hosting Comparison](https://www.websiteplanet.com/blog/serverless-vs-traditional-hosting/) Feel free to reach out if you have any further questions or need additional information!  Here's a Mermaid diagram that visually explains the comparison between serverless and traditional hosting: ```mermaid graph TD; A[Hosting Options] --> B[Serverless Hosting] A --> C[Traditional Hosting] B --> D[Pros] B --> E[Cons] D --> D1[Cost-Effective for Variable Traffic] D --> D2[Reduced Management Overhead] D --> D3[Scalability] E --> E1[Cold Starts] E --> E2[Complex Pricing Models] C --> F[Pros] C --> G[Cons] F --> F1[Predictable Costs] F --> F2[Full Control] F --> F3[No Cold Starts] G --> G1[Resource Over-Provisioning] G --> G2[Maintenance Responsibility] A --> H[Cost Comparison] H --> I[Low to Medium Traffic] H --> J[Consistently High Traffic] I --> I1[Serverless: ~ $7/month] I --> I2[Traditional: ~ $4/month] J --> J1[Serverless: Varies] J --> J2[Traditional: ~ $30/month] style D fill:#BBF,stroke:#333,stroke-width:2px style E fill:#FBB,stroke:#333,stroke-width:2px style F fill:#BBF,stroke:#333,stroke-width:2px style G fill:#FBB,stroke:#333,stroke-width:2px style H fill:#FF9,stroke:#333,stroke-width:2px ``` ### Explanation of the Diagram 1. **Hosting Options**: - Two primary types of hosting: **Serverless Hosting** and **Traditional Hosting**. 2. **Serverless Hosting**: - **Pros**: - **Cost-Effective for Variable Traffic**: You only pay for what you use, making it cost-effective for applications with unpredictable traffic. - **Reduced Management Overhead**: No need to manage servers; the cloud provider handles it. - **Scalability**: Automatically scales with the load. - **Cons**: - **Cold Starts**: Initial request latency when functions are not frequently invoked. - **Complex Pricing Models**: Costs can be unpredictable due to variable usage. 3. **Traditional Hosting**: - **Pros**: - **Predictable Costs**: Easier to budget with fixed pricing. - **Full Control**: Ability to customize and optimize server environments. - **No Cold Starts**: Consistent performance without startup delays. - **Cons**: - **Resource Over-Provisioning**: May pay for unused resources. - **Maintenance Responsibility**: Responsible for server maintenance, updates, and security. 4. **Cost Comparison**: - **Low to Medium Traffic**: - **Serverless**: Approximately $7 per month for typical usage scenarios. - **Traditional**: Approximately $4 per month for a basic plan. - **Consistently High Traffic**: - **Serverless**: Cost varies based on usage, potentially higher. - **Traditional**: Approximately $30 per month for a reserved instance plan. This diagram and explanation should help visualize the key points in deciding between serverless and traditional hosting for your applications.

sh20raj

How to Kickstart Your API Journey: An Easy Beginner's Guide

Creating APIs can seem daunting, but with the right approach, it can be both straightforward and...

https://dev.to/vuyokazimkane/how-to-kickstart-your-api-journey-an-easy-beginners-guide-a9m

api, apigateway, beginners, basic

Creating APIs can seem daunting, but with the right approach, it can be both straightforward and rewarding. Here’s a simplified guide with code examples to get you started: **1. Setting Up Your Environment** Before diving into code, ensure you have a programming environment set up. Let's use Python with Flask, a lightweight web framework, for our examples. First, install Flask using pip: ``` pip install Flask ``` **2. Creating Your First API Endpoint** Let’s create a simple API endpoint that returns a greeting message. ``` from flask import Flask, jsonify app = Flask(__name__) @app.route('/hello', methods=['GET']) def hello(): message = {'message': 'Hello, World!'} return jsonify(message) if __name__ == '__main__': app.run(debug=True) ``` Explanation: - We import Flask and jsonify for creating our web server and formatting JSON responses. - @app.route('/hello', methods=['GET']) decorates the hello() function, making it respond to GET requests at /hello. - Inside hello(), we create a dictionary message and return it as JSON using jsonify(). **3. Testing Your API** After writing your API code, it’s essential to test it. Open your terminal, navigate to the directory where your script is saved, and run: ``` python your_script_name.py ``` Visit http://localhost:5000/hello in your web browser or use a tool like Postman to send a GET request and see your API in action. **4. Adding Parameters and Handling Data** Let's extend our API to accept a name parameter and personalize the greeting. ``` from flask import request @app.route('/greet', methods=['GET']) def greet(): name = request.args.get('name') if name: message = f'Hello, {name}!' else: message = 'Hello, Stranger!' return jsonify({'message': message}) ``` Explanation: - We use request.args.get('name') to retrieve the 'name' parameter from the query string. - Depending on whether 'name' is provided, we generate a personalized greeting message. **5. Enhancing Your API** As you become more comfortable, you can add features like authentication, database interactions, or more complex data handling. Here’s an example of adding a POST endpoint for creating resources: ``` from flask import request, abort tasks = [] @app.route('/tasks', methods=['POST']) def create_task(): if not request.json or 'title' not in request.json: abort(400) task = { 'id': len(tasks) + 1, 'title': request.json['title'], 'description': request.json.get('description', ''), 'done': False } tasks.append(task) return jsonify({'task': task}), 201 ``` Explanation: - We define a list tasks to store our tasks. - The create_task() function handles POST requests to /tasks, expecting JSON data with at least a 'title' field. - It creates a new task, assigns an ID, and adds it to the tasks list, returning the created task with a 201 status code if successful. **Conclusion** Starting with simple examples like these allows you to grasp the fundamentals of API creation. As you progress, you can explore more advanced topics such as error handling, security, and scaling your APIs. With practice and exploration, creating robust APIs can become a skill that opens up countless possibilities in software development.

vuyokazimkane

SDK va Runtime

SDK (Dasturiy ta'minotni ishlab chiqish to'plami): SDK - bu .NET platformasida ilovalarni ishlab...

https://dev.to/shoxjaxon1202/sdk-va-runtime-599

SDK (Dasturiy ta'minotni ishlab chiqish to'plami): <u>SDK - bu .NET platformasida ilovalarni ishlab chiqish uchun mo'ljallangan asboblar va kutubxonalar to'plami. Bunga quyidagilar kiradi: Kompilyatorlar: C#, F# yoki VB.NET dasturlash tillarida manba kodini bajariladigan kodga aylantirish uchun. Kutubxonalar va dasturchilar asboblari: Har xil turdagi ilovalarni (masalan, veb-ilovalar, ish stoli ilovalari) ishlab chiqish uchun zarur bo'lgan sinf kutubxonalari to'plami (masalan, asosiy sinf kutubxonasi - BCL). Hujjatlar va kod misollari: Ishlab chiquvchilarga ilovalarni yaratish, sinab ko'rish va disk raskadrovka qilishda yordam beradigan manbalar.</u>  Runtime (CLR - Common Language Runtime) CLR (Common Language Runtime) .NET dasturlarini ishga tushiradigan ish vaqti muhitidir. U quyidagilarni ta'minlaydi: <u>Xotirani boshqarish va axlat yig'ish: Avtomatik xotirani boshqarish, foydalanilmagan resurslarni bo'shatish va axlat yig'ish. Istisnolarni boshqarish: istisnolarni boshqarish va dasturni bajarish paytida xatolarni qayta ishlash. Ko'p ish zarralarini qo'llab-quvvatlash: bir nechta dastur iplari bilan ishlash mexanizmlari.</u> **SDK va Runtime o'rtasidagi o'zaro ta'sir:** <u>SDK dasturchi tomonidan ilovalarni yozish va yaratish uchun ishlatiladi. U ilovalar yaratish uchun zarur bo'lgan vositalar va kutubxonalarni taqdim etadi. Ish vaqti dasturni bajarish jarayonida uni bajarish uchun ishlatiladi. U kerakli ijro muhitini ta'minlaydi va ilovaning bajarilishi jarayonini boshqaradi.</u> Shunday qilib, SDK va Runtime .NET ilovalarini ishlab chiqish va ishga tushirish uchun birgalikda ishlaydi, ishlab chiquvchilarni .NET platformasida dasturiy ta'minotni yaratish va muvaffaqiyatli ishga tushirish uchun barcha zarur vositalar va muhit bilan ta'minlaydi. **Misol** Aytaylik men dasturchiman va .NET (C#) da biror ilova ishlab chiqdim, yoki Telegramga o'xshagan dastur... xullas nima farqi bor.... Keyin uni do'stimni kompyuteriga o'tkazdim. Do'stim esa dasturchi emas. Shu bilan birgalikda .NET SDK ham o'rnatmaydi, SDK dasturchiga kerak xolosda. Chunki yozgan kodini build qilib berishi kerak bo'ladi. Oddiy odam esa kod yozmaydi. Dasturchi bo'lmagan oddiy odamga .NET Runtime beriladi. Yani Runtime dasturini kompyuteriga install qilgandan keyin, bizning dasturni ochishda muammo bo'lmaydi. Aks holda .NET Frameworkini o'rnat didi.

shoxjaxon1202

Outdoor LED Screen Suppliers: Enhancing Experiences in Public Spaces

Improving Public Spaces with Outdoor LED Screens Outdoor LED screens are hilarious and colorful...

https://dev.to/matthaeus_correlluyrf_5e/outdoor-led-screen-suppliers-enhancing-experiences-in-public-spaces-2l8k

Improving Public Spaces with Outdoor LED Screens Outdoor LED screens are hilarious and colorful features in public areas. They can run ads, deliver news and entertainment to people, engage with their followers. Displayed at concerts, sports events, and theme parks such as a Behemoth roller coaster ride in 2019tNit views more like an oversized television instead of the desired wall...see below). They attract attention, they promote products or events, and provide an emotional component. Benefits of Outdoor LED Screens Outdoor LED Transparent Displayscreens are able to be used for advertising, informing and engaging people who live in public spaces. They show content updatable from a distance using some technology. So the screens become interactive and very engaging to end-users. Safety First! Most importantly safety it top priority and with outdoor Flexible LED Display you have to be very careful. Of course, to avoid accidents, they have security standards. These screens endure harsh climate like strong winds and heavy rain. Electrical grounding and other safety measures are important to avoid electrical accidents. Accessing The Benefits of Outdoor LED Screens As long as you think ahead, using outdoor LED screens is a breeze. Purchase or rent a screen to display your content. Professionals are required to set up the screen, which demand technical knowledge. The software of the screen is very easy to manage and handle, making it great for people with less familiarity. Quality and Service This is one factor that will determine if you can get a standard outdoor Flexible Indoor LED Display. With working conditions being provided, the reliable providers also furnish you together with support services that multi-touch screens must be acquired. This ensures that the customers get maximum return on their investment. Outdoor LED Screens Applications These would be ideal for quickly displaying event schedules or advertising campaigns. Additionally, they can be leveraged at bus stops to display routes or within a city for weather reports, news and alerts or in common place space meant for multiple objectives. Conclusion - Effective ways to enhance public spaces with Outdoor LED Screens When used in any sort of public areas, they are top-of-the-line due to their advanced technology and service as well being safe for the environment with numerous applications. Find out more about Outdoor LED Screens today! More lively public spaces with LED screens If you would like to add a little bit of flare to your regular public haunts... For Outdoor LED Screen Suppliers, You have come to the right place!! By means of their breakthrough technology, outstanding service and versatility regarding applications outdoor LED screens can transform any given public area into a vivid and lively place. Continue reading to explore the tremendous benefits of Outdoor LED Screen Suppliers! Benefits of Outdoor LED Screens Outdoor LED screens can be used to serve a variety of notifications all the while adding visibility and style when displaying advertisements etc. These are commonly used by concert venues, sports events and amusement parks alike. From the vivid imagery that stops people in their tracks, to announcing specials and promotions boldly, our installations grab your guests' attention and keep them talking long after they've attended. Innovating Technology In Outdoor LED Screens Outdoor LED screens are fast becoming the solution of choice for displaying compelling visual and video content in public places. Today, the latest development is taking place in digital signage technology by merging it with interactive software and content management systems. This allows users to customize content at will, remotely update screens and interact with the public by using interactive touch-screens. Why Safety Is The First Requirement For Outdoor LED Screen? In public spaces, safety always comes first - and this also applies to outdoor LED signs. Manufacturers have to ensure their products meet safety standards like UL certification. They have to be properly built in order for the weather such as high winds, heavy rain and snow with proper grounding so that no electrical issues occur. Leveraging the Potential of Outdoor LED Screens In Open Publicorelease WOWBANJI - Our SiteWithTitle! The main purpose of outdoor LED screens is to convey business messages, information - and entertainment. They are sleight of hand: a kind of community bulletin board or public stage, where our successes and heroes can be celebrated. This including distributing health information, educational content and emergency notifications. How to Perfect the Practice of Utilizing Outdoor LED Screens There Is Always a Plan Required, Yet Out There LED Screens are Easy! Customers can in turn purchase a screen ot opt for the on-the-go mode to show their creations. Installation-Professionals making helpful construction and electrical works are the ones who must install them. The screens are simple to use, ensuring content management can be carried out either remotely or onsite and with ease. Adherence to Quality and Service Standards For every outdoor use case the quality of material will be extremely important for Outdoor LED screens. Therefore, choosing a credible supplier guarantees the customer will get his money's worth Additionally, many providers offer service agreements that will help to ensure the screens are running cleanly related and economically for years. The Many Uses Of Outdoor LED Screens Outdoor led screens can be used with great effect for the creation of impactful moments in order to announce event schedules or launch promotional campaigns quickly. These are well suited for public transportation sites, to show routes and schedules or in urban areas, where weather updates, news about different events. To sum up, Outdoor LED Screen Suppliers provide an excellent way to enhance public spaces. With their cutting edge technology, white-glove service standards and strict safety protocols used across a multitude of platforms allow them to offer the best experiences in any public domain. ENTER THE WORLD OF OUTDOOR LED SCREENS SUPPLIERS HERE TODAY

matthaeus_correlluyrf_5e

HOW TO RECOVER SCAMMED CRYPTOCURRENCY BACK

After being scammed out of $745,000 by an individual I met online through a fraudulent investment...

https://dev.to/alfred_konsa_7d291d234fe2/how-to-recover-scammed-cryptocurrency-back-22el

cryptocurrency, blockchain, bitcoin, ethereum

After being scammed out of $745,000 by an individual I met online through a fraudulent investment scheme, I sought legal assistance to recover my funds that I lost in crypto, unfortunately I discovered numerous testimonials about DAREK RECOVERY I contacted them on :[email protected], and in less than 48 hours all my funds where recovered The company are very real and reliable in recovery funds I never knew that I would be happy in my life again after heartbreak of losing all my investment to scam all thanks to DAREK RECOVERY of : [email protected]

alfred_konsa_7d291d234fe2

How and Where to Handle Exceptions While Maintaining a Great API

Exception handling is not easy. It can be done in the wrong places, it can be done the wrong way, and...

https://dev.to/selmaohneh/how-and-where-to-handle-exceptions-while-maintaining-a-great-api-3lhi

cleancode, tutorial, dotnet, programming

Exception handling is not easy. It can be done in the wrong places, it can be done the wrong way, and it can even be forgotten completely. The best we can do to help our fellow developers with that problem is to design our API as bulletproof as possible. An exception-less approach via the Result Pattern is a step in that direction. In this article, I will guide you through a typical software problem I faced multiple times working in the production industry. I will provide some simple examples, share my thoughts, and explain why I prefer the exception-less approach in this use case. --- I often have to deal with actual hardware at my job. * Opening/Closing valves * Switching relais * Retrieving values from temperature sensors * Moving actuators * … ## The Manufacturer’s DLL All these expensive hardwares gets shipped with a piece of software in form of a DLL from the manufacturer. Let’s say we want to measure the ambient pressure and bought some expensive pressure sensor. The manufacturer provided us with a driver that has the following features: ```csharp public interface IPressureSensorDriver { void Init(); void StartMeasurement(); void StopMeasurement(); double GetPressure(); } ``` As for most manufacturer DLLs the API is not very convenient. To actually poll the current ambient pressure we have to 1. Call Init() 2. Call StartMeasurement 3. Call StopMeasurement() 4. Call GetPressure() ## Don’t repeat yourself! Since we don’t want calls repeated all over our solution we will introduce a new class that wraps the manufacturer's driver and acts as a convenient service for us. ```csharp public class PressureService { private readonly IPressureSensorDriver _driver; public PressureService(IPressureSensorDriver driver) { _driver = driver; } public double GetPressure() { _driver.Init(); _driver.StartMeasurement(); _driver.StopMeasurement(); double pressure = _driver.GetPressure(); return pressure; } } ``` Let’s test our service by polling the pressure multiple times in a row: ```csharp public class Program { public static async Task Main(string[] args) { var driver = new PressureSensorDriver(); var pressureService = new PressureService(driver); for (int i = 0; i < 4; i++) { double pressure = pressureService.GetPressure(); Console.WriteLine($"Pressure: {pressure}"); await Task.Delay(1000); } Console.ReadKey(); } } ``` And of course: As soon as we run the application we’ll get an unhandled exception: > Exception Unhandled — System.Exception: ‘Connection to Sensor interrupted.’ ## What did we do wrong? We just called a method from another application layer without any exception handling. The driver class is a third-party code we do not know. Nevertheless we crossed that border without any safety net. We just assumed that the method will work as expected. > Always handle exceptions on application borders! This includes: * Hardware calls no matter the communication protocol * Web Requests or anything that depends on the internet * External code, either unknown, undocumented or untested ## The Classic Solution Since we already found the problem, let’s implement the classic solution for it: a try-catch right in our service: ```csharp public class PressureService { private readonly IPressureSensorDriver _driver; public PressureService(IPressureSensorDriver driver) { _driver = driver; } public double GetPressure() { try { _driver.Init(); _driver.StartMeasurement(); _driver.StopMeasurement(); double pressure = _driver.GetPressure(); return pressure; } catch { return double.NaN; } } } ``` That, of course, will work. All exceptions will be swallowed by our `catch`. If something goes wrong, we simply return a `double.NaN` . We are now exception-less! But there are some flaws. Let’s look at the API of our service from a user’s view. And with API I simply mean our method `GetPressure()`; its name, its return type and its input arguments. Because that is all the user sees. * The user has no way to know whether the method throws an exception or not. He has no way to decide whether he has to put that method call in a `try/catch` without looking into it. That sucks. * The user has no way to know whether the method was a success or not. Even when the method ran without an exception, he has to check whether he got a valid number or `double.NaN`. That sucks, as well. ## The Try Pattern Let’s tweak our service a little further to see if we can get rid of these flaws: ```csharp public class PressureService { private readonly IPressureSensorDriver _driver; public PressureService(IPressureSensorDriver driver) { _driver = driver; } public bool TryGetPressure(out double pressure) { try { _driver.Init(); _driver.StartMeasurement(); _driver.StopMeasurement(); pressure = _driver.GetPressure(); return true; } catch { pressure = Double.NaN; return false; } } } ``` Our method now returns the pressure via an out variable. The return value of the method now is a `bool` indicating success or failure of the method. We also tweaked the name of our method from `GetPressure` to `TryGetPressure`. We just implemented the Try Pattern. ## What have we won that way? Method names starting with `Try` are exception-less! That is the most important part of the Try Pattern. Just by reading the method’s name the user of our service already knows that he does not need to handle any exceptions when calling it. This sounds so trivial but is a big part of API design: > If you let the user know what to expect, he will do it the correct way. The other flaw was eliminated, as well: The user can simply check the returned `bool` flag to see if the method call was a success or not. He does not need to look at the pressure value at all, when the method already returned `false`. But in my opinion there are some new flaws: * I don’t like the syntax of out variables. A lot of Clean Code Prophets would sign that immediately. It’s just confusing — everyone expects the outputs of the method left to its name and suddenly there is in output right between the inputs? Just because we can, does not mean we should. Don’t obfuscate your code with all the syntax sugar your language provides. Keep it Simple! * We only have a single, binary result. But most of the time we want to provide the user of our method with more information. Consider all the reasons our method could fail: The service could not connect to the sensor? The service was connected to the sensor but the connection was lost? The sensor returned a value but it is not plausible? There might be different ways the user wants to handle each of these situations. In some he might schedule a retry, in others he might simply show a descriptive error message. ## The Result Pattern To even solve these flaws, let’s tweak our service even a little further: ```csharp public class PressureService { private readonly IPressureSensorDriver _driver; public PressureService(IPressureSensorDriver driver) { _driver = driver; } public Result<double> GetPressure() { try { _driver.Init(); _driver.StartMeasurement(); _driver.StopMeasurement(); pressure = _driver.GetPressure(); if(pressure < 0) { return Result.Fail("Pressure is not plausible."); } return Result.Ok(pressure); } catch() { return Result.Fail("Could not retrieve Pressure from Sensor."); } } } ``` In this version we don’t return a `bool` but a full `object` of type `Result<double>`. Before digging deeper into the type `Result`, have a look at the new usage of our service: ```csharp public static async Task Main(string[] args) { var driver = new PressureSensorDriver(); var pressureService = new PressureService(driver); Result<double> pressure = pressureService.GetPressure(); if (pressure.IsFailed) { HandleErrorWhileRetrievingPressure(pressure.Errors); } Console.WriteLine($"Pressure: {pressure}"); Console.ReadKey(); } ``` If you review the API and its usage you will notice: You do not retrieve a `double` but a `Result<double>`. You are forced to think about what you will do if the operation failed. Just by using `Result<double>` you know that there could be problems. You wouldn’t have noticed that if I just threw an exception inside the method, would you? And that is the big benefit of the Result Pattern. > A good API forces the user to use it correctly! It makes it nearly impossible to forget about error handling. ## The Result Object The result object simply contains the actual value you are interested in plus any additional information you need — error reasons, success reasons, helper methods like `IsFailed` — be creative! This pattern is not new; it’s a classic. There are many libraries for the Result Pattern available, so you don’t even have to implement your own `Result` class! My .NET example used the great project [FluentResults](https://github.com/altmann/FluentResults). ## Conclusion Just to digest, I will repeat my introduction: Exception handling is not easy. It can be done in the wrong places, it can be done the wrong way, and it can even be forgotten completely. The best we can do to help our fellow developers with that problem is to design our API as bulletproof as possible. An exception-less approach via the Result Pattern is a step in that direction. Thanks for reading!

selmaohneh

Exploring the Charming UI/UX Design of "Cats&Soup"

As a developer and gaming enthusiast, I often find myself drawn to unique and beautifully crafted...

https://dev.to/jpdengler/exploring-the-charming-uiux-design-of-catssoup-3l9a

webdev, ui, uidesign, ux

**A**s a developer and gaming enthusiast, I often find myself drawn to unique and beautifully crafted mobile games. Recently, my fiancée and I have been captivated by "Cats&Soup," an enchanting idle-type game that has kept us entertained for over six months. Developed by HIDEA, this game is a perfect blend of adorable animations, intuitive UI, and relaxing gameplay, making it a standout in the world of mobile games. ## About the Game Cats & Soup is an idle mobile game developed by Hidea, available on iOS and Android, that was initially released on October 12, 2021. The game features a variety of different cats, each with their own unique abilities and characteristics, that you can place in your forest. As the owner and manager of this unique forest kitchen, it’s your job to assist a team of cute and talented cats as they cook up delicious soups and other dishes. Starting with simple soups, you can expand your business by selling dishes and unlocking new stations, like the juice and grill. The cats will keep working and earning gold for you even when you’re not playing, so come back often to collect your earnings and invest in upgrades to keep your forest kitchen running smoothly! ### Categories 💎 **Collectibles:** Cats, Fish & Food Items, Equipment, Furniture, Skins 📖 **Menus:** Facilities, Recipes, Gift Shop, Quests, Collection, Theme, Others 🎟️ **Events:** Periodic Events 🪙 **Currencies:** Skills ## Overview of the Game on Launch  --- In "Cats&Soup," players collect various cats that contribute to different soup stations, rest areas, and play zones. The game's primary charm lies in its stunning illustrations and animations, which add a whimsical and delightful feel to the overall experience. The developers at HIDEA have truly outdone themselves in creating a visually appealing and immersive environment. ### Intuitive UI Design One of the standout features of "Cats&Soup" is its interactive and intuitive UI. The bottom of the screen features food icons that players can tap to sell the items the cats have made for coins. These coins are then used to upgrade various elements within the game. Accessing the craft menu is straightforward – simply press the hammer icon, and you can upgrade everything and anything with ease.  The UX design complements the UI by providing a seamless and enjoyable player experience. The game uses clear visual cues and smooth transitions to guide players through different actions, reducing any potential confusion. The feedback system, such as subtle animations when interacting with elements and the incremental progress indicators, ensures that players always know the impact of their actions. This thoughtful design keeps players engaged and makes the overall gameplay experience both relaxing and rewarding. ### Crafting Menu The UI remains consistent throughout the app, both aesthetically and functionally. Progress information, especially monetary details, is always displayed in a simple UI at the top of the screen, making it easy for players to stay updated. The crafting menu is not only simple but also highly effective, allowing players to switch between crafting options with a minimal aesthetic drop-down list for each category.  ### Consistency and Functionality The game's UI design demonstrates a perfect balance between consistency and functionality. Every element is thoughtfully placed to ensure a seamless and enjoyable user experience. The crafting menu, for example, is straightforward yet highly functional, fitting the game's overall style while providing essential features for progression. Additionally, the consistent use of color schemes, iconography, and typography throughout the game reinforces its cohesive aesthetic. This attention to detail not only enhances the visual appeal but also helps players quickly familiarize themselves with the game's interface. By maintaining a consistent design language, "Cats&Soup" ensures that players can navigate the game effortlessly, minimizing the learning curve and allowing them to focus on the fun aspects of managing their virtual forest kitchen. ### Relaxing Gameplay  Beyond its technical aspects, "Cats&Soup" excels in offering a relaxing gameplay experience. It's the kind of game you can unwind with after a long day or when you have a few minutes to spare. The calming animations and soothing background music create a tranquil atmosphere that makes you want to keep coming back. The cozy aesthetic is further enhanced by the UI/UX design, which promotes a stress-free experience. Soft color palettes and gentle transitions contribute to the overall soothing environment. The intuitive layout ensures that players can easily navigate through the game without feeling overwhelmed, allowing them to fully immerse themselves in the delightful world of cats and soups. This thoughtful design approach not only makes the game enjoyable but also provides a comforting escape from daily stresses. ### Recommendations While "Cats&Soup" is already excellent, I would recommend a few changes to enhance the user experience further. For instance, adding some multiplayer elements like scores and sharing items or info with friends through the app. Additionally, providing more detailed tooltips or hints could help new players understand the mechanics faster, adding a tooltips feature in settings to adjust these would be great. Some excellent points a daily user of the game, my fiancée, brought up include better categorization of upgrades by each station. When holding the auto upgrade button, it currently upgrades random stations. It would be more user-friendly to have sub-category options allowing users to focus on specific areas, such as Soup stations, resting stations, or chopping stations, for automatic upgrades. Another issue we both agree on is that clothing items can only be used on one cat at a time, which limits the customization options. Allowing multiple uses of each clothing item would enhance the users' ability to personalize cats in more detail. ### Questions for Fellow Developers As fellow developers, I'd love to hear your thoughts on "Cats&Soup" and its design. Here are some questions to spark our discussion: 1. **What principles of UI/UX design do you think were most effectively implemented in this app?** 2. **How would you approach enhancing the user engagement and retention for a game like this?** 3. **What do you believe is the most important step in designing an app, especially a game similar to this?** Feel free to share your answers and any additional thoughts in the comments below. Let's discuss and learn from each other's insights! --- By sharing these insights and questions, I hope to engage with fellow developers and gain new perspectives on mobile game design. "Cats&Soup" is a beautiful example of how thoughtful UI/UX design can enhance the gaming experience, and I look forward to hearing your thoughts on how we can continue to innovate and improve in this field. `THIS IS IN NO WAY SPONSERED OR RELATED TO HIDEA OR ANY STUDIO INVOLVED, PURELY A POSITIVE REVIEW - BIG THANKS TO HIDEA STUDIOS AND ALL THE DEVS INVOLVED WITH THIS GAME`

jpdengler

The Future of Hydro Excavation: Shanghai Hangkui's Innovations

Shanghai Hangkui: For The Safe, Environmentally-friendly Excavation-led Era Also located at No.66...

https://dev.to/mona_mallarynjuy_8bdd53b/the-future-of-hydro-excavation-shanghai-hangkuis-innovations-32me

design

Shanghai Hangkui: For The Safe, Environmentally-friendly Excavation-led Era Also located at No.66 Luoting Road,Jiangqiao Industrial Park,Shanghai Hangkui is leading the way in changing hydro excavation across almost everything you can dig out of the ground! Other people, such as those in the video you are about to watch below, are also creating new and innovative solutions that could lead us into a safer and cleaner future - one with way less digging. Among other key drivers of this transformation is Shanghai Hangkui, which has emerged in recent years and made a significant impact on the industry with its advanced technology (more on that later) as well as atypical environmental concerns. Shanghai Hangkui -- Technological Advancements A key driver behind Shanghai Hangkui's innovative approach is a massive technological leap. The company has perfected hydro excavation systems which have been coupled with advanced software and robotics. Water pressure and vacuum suction is optimized for proportionate digging, using real-time data analysis that they can deliver based on the availed advanced HYUNDAI EXCAVATOR machines. Shanghai Hangkui is making it a perfect example of increased efficiency in excavation processes by slashing waste out and raise productivity. By automating work has not only renewed operation velocity but also lessens error-proneness, which is indeed a kind of cutting-edge in this MCCD. Piloting the Path for a Cleaner future Faced with the massive demand for extractive resources and environmental sustainability, Shanghai Hangkui has led in green excavation streams. They have been concentrating on recycling the excavate materials and minimizing their carbon emissions as much as possible in order to reduce impact of their solutions on the environment. As a result, every job has positive effects on the natural environment by using environmentally-friendly liquids and power-efficient systems. However, Shanghai Hangkui goes further than product design and is engaged in reforestation initiatives and the development of renewable energy sources. This holistic attitude to environment preservation highlights how extensive solutions can be achieved beyond simply designing products. Hydro Excavation Solutions For Your Operations of Tomorrow Reflecting this spirit of innovation, Shanghai Hangkui's latest hydro excavation solutions have been designed with the city in mind. Their KOMATSU EXCAVATOR equipment packs a punch in an inconspicuous size, which allows them to work in and out of cramped city confines without losing any power. This capability is perfect for infrastructure updates and utility work as well as sensitive archaeological excavations. Additionally, their solutions include intelligent sensors and AI algorithms giving predictive maintenance alerts as well as the ability to connect remotely for a safer on-site process. Committed to Safe Digging Safety should be basic in any excavation work and Shanghai Hangkui values that at all expense. Their hydro excavation systems are engineered for maximum safety and guaranteed to be far less risky compared to standard digging methods that expose workers to accidental strikes on underground utilities. They target the soil with a level of precision even greater than what current GPR technology can reach to minimize damage around buried pipelines and cables in order to prevent any outages. In China, Shanghai Hangkui has invested in extremely high levels of staff training and the establishment of stringent safety protocols to create a workplace culture where zero-incident performance is not only encouraged but expected. Such a steadfast commitment to safety in return has won them industry accolades and made their name synonymous with professionalism, especially when working within critical areas. Diversification of the Excavation Industry The influence of Shanghai Hangkui is not limited to just the products and services they provide; part revolutionaries in hydro excavation. They build on research and development SANY EXCAVATOR projects via strategic partnerships and collaborations to gain new insights into uses for their excavation technology. From disaster response, where quick excavation can be a matter of life and death, to new sectors like renewable energy installations - Shanghai Hangkui has broken through limitations on what an industry long restricted by conventional methods can do. They envision a future where excavation is more than just an activity and rather, it acts as catalyst for sustainable development to bring forth a safer, cleaner & efficient world of tomorrow. In Conclusion Even more impressive, this company has led the way for innovation in hydro excavation showing how new advancements could completely transform an industry when combined with a dedication to sustainable and safe practices from Shanghai Hangkui. Their continued efforts remain visionaries, tightening the memory of tomorrow where extraction is not a work but a serious act generating sustainable foundations for all.

mona_mallarynjuy_8bdd53b

Building a Simple Blog with Flight - Part 2

This is a continuation of part 1 of the blog. Hopefully you've already finished that part of the blog...

https://dev.to/n0nag0n/building-a-simple-blog-with-flight-part-2-5acb

php, tutorial, api, blog

This is a continuation of [part 1 of the blog](https://dev.to/n0nag0n/building-a-simple-blog-with-flight-part-1-4ap8). Hopefully you've already finished that part of the blog first before we go onto some sweet improvements! ## Sweet Improvements Now that we have a basic system in place, we need a few other enhancements to really make this system shine. ### Controller improvements See how it's a little annoying that the construct is the same for each of the controllers we created? We could actually create a simple abstract class to help clean up some of the code. ```php <?php // app/controllers/BaseController.php declare(strict_types=1); namespace app\controllers; use flight\Engine; use flight\net\Request; use flight\net\Response; use Ghostff\Session\Session; use flight\database\PdoWrapper; /** * These help with IDE autocompletion and type hinting if you * use the shortcut method. * * @method Request request() * @method Response response() * @method Session session() * @method PdoWrapper db() * @method string getUrl(string $route, array $params = []) * @method void render(string $template, array $data = []) * @method void redirect(string $url) */ abstract class BaseController { /** @var Engine */ protected Engine $app; /** * Constructor */ public function __construct(Engine $app) { $this->app = $app; } /** * Call method to create a shortcut to the $app property * * @param string $name The method name * @param array $arguments The method arguments * * @return mixed */ public function __call(string $name, array $arguments) { return $this->app->$name(...$arguments); } } ``` That `__call()` method is a little helpful shortcut so you don't have to do `$this->app->something()` in your controllers, you can instead do `$this->something()` and it "forwards" it to `$this->app->something()`. There's also reference to a Session class in there that we'll talk about in juuuuuust a bit. Now we can clean up the controller code a little bit. Here's the `HomeController.php` with the cleaned up code. ```php <?php declare(strict_types=1); namespace app\controllers; class HomeController extends BaseController { /** * Index * * @return void */ public function index(): void { $this->render('home.latte', [ 'page_title' => 'Home' ]); } } ``` Cleaner right? You can apply this same set of changes to the `PostController` and `CommentController`. ### Route Cleanup You may have noticed we hard coded the routes in our little app. We can use route aliases to change that behavior so more flexible in the future (especially with such a new blog, anything can change at this point!) So let's add an alias to our home route: ```php $router->get('/', \app\controllers\HomeController::class . '->index')->setAlias('home'); ``` Then we have a couple options to generate the URLs from the alias. In some controller methods you'll notice there is a `$this->app->redirect('/blog');` statement. To generate the URL from the alias you could do the following instead: ```php // after we setup the 'blog' alias $url = $this->app->getUrl('blog'); $this->app->redirect($url); ``` If you need to add a method in your Latte code to generate the URL for you, we could change how `Latte` is setup. ```php $Latte = new \Latte\Engine; $Latte->setTempDirectory(__DIR__ . '/../cache/'); // This adds a new function in our Latte template files // that allows us to generate a URL from an alias. $Latte->addFunction('route', function(string $alias, array $params = []) use ($app) { return $app->getUrl($alias, $params); }); $app->map('render', function(string $templatePath, array $data = [], ?string $block = null) use ($app, $Latte) { $templatePath = __DIR__ . '/../views/'. $templatePath; $Latte->render($templatePath, $data, $block); }); ``` And now that you have the code in place, when you're in your template files, you can do something like this: ```html <!-- this was /blog/{$post->id}/edit --> <a class="pseudo button" href="{route('blog_edit', [ 'id' => $post->id ])}">Update</a> ``` Why do we do this when it seems like it takes longer to create the url? Well some software platforms need to adjust their URLs (because marketing or product said so). Let's say you've hard coded everything so that the blog page is the `/blog` URL and marketing says they want another blog page, but the current blog page URL they want as a different page for a different market segment. In this case, let's say they want it to be changed from `/blog` to `/blog-america`. If you used aliases, all you would have to do is change the route URL in one spot (the `routes.php` file), and everywhere around your codebase it will update to the new URL. Pretty nifty right? If you want to have some fun, now that you've added an alias for `/blog/@id/edit`, why don't you change the URL part to `/blog/@id/edit-me-i-dare-you`. Now when you refresh the page, you'll see that because of the `->getUrl('blog_edit')` code you're using, your URL's just updated themselves and when you click on the new URL is just works! Sweet! Added bonus, you'll notice with the comment aliases we use that we only do this: ```html <a class="pseudo button" href="{route('comment_destroy', [ 'comment_id' => $comment->id ])}">Delete</a> ``` We should need to also specify `@id` right cause the route is `$router->get('/@id/comment/@comment_id/delete', /* ... */);`? Well, when `getUrl()` is called, it will take a peek at your current URL and if it sees that your current URL has an `@id` in it, it will automatically add that to the URL for you. So you don't have to worry about it! ### Authentication with Middleware You don't want anyone in the world to be able to update your blog right? So we'll need to implement a simple login mechanism to make sure that only logged in people can add to or update the blog. If you're remembering from up above, we need to add a route, either a new controller and a method or a method in an existing controller, and a new HTML file. Let's create the routes we'll need first: ```php // Blog $router->group('/blog', function(Router $router) { // Login $router->get('/login', \app\controllers\LoginController::class . '->index')->setAlias('login'); $router->post('/login', \app\controllers\LoginController::class . '->authenticate')->setAlias('login_authenticate'); $router->get('/logout', \app\controllers\LogoutController::class . '->index')->setAlias('logout'); // Posts // your post routes }); ``` Now let's create new controllers with `runway`: ``` php runway make:controller Login php runway make:controller Logout ``` And you can copy the code below into your `LoginController.php`: ```php <?php declare(strict_types=1); namespace app\controllers; class LoginController extends BaseController { /** * Index * * @return void */ public function index(): void { $this->render('login/index.latte', [ 'page_title' => 'Login' ]); } /** * Authenticate * * @return void */ public function authenticate(): void { $postData = $this->request()->data; if($postData->username === 'admin' && $postData->password === 'password') { $this->session()->set('user', $postData->username); $this->session()->commit(); $this->redirect($this->getUrl('blog')); exit; } $this->redirect($this->getUrl('login')); } } ``` And copy the below code for your `LogoutController.php`: ```php <?php declare(strict_types=1); namespace app\controllers; class LogoutController extends BaseController { /** * Index * * @return void */ public function index(): void { $this->session()->destroy(); $this->redirect($this->getUrl('blog')); } } ``` Well wait a minute here, the controller is now calling a `session()` method. We'll need to register a new service in our `services.php` file to handle sessions. Thankfully there's a [great session handler](https://docs.flightphp.com/awesome-plugins/session) that we can use! First we'll need to install it with composer: ``` composer require ghostff/session ``` Now we can add the session service to our `services.php` file: ```php // Session Handler $app->register('session', \Ghostff\Session\Session::class); ``` > Do you see that `$this->session->commit();` line in the controller? This is a very intentional design decision by the library author for a very good reason. Long story short, in PHP [there is such a thing](https://www.php.net/manual/en/function.session-write-close.php) as `session_write_close()` which writes the session data and closes the session. This is important because if you have a lot of AJAX requests, you don't want to lock the session file for the entire time the request is being processed. That might sound pointless to you, but what if one of your ajax requests (or page loads) is running a very large report that might take 10-20 seconds to run? During that time you will not be able to make another request on the same site because the session in locked. Yikes! The `commit()` method is a way to write the session data and close the session. If you don't call `commit()` the session will actually never be written to, which can be annoying, but what's more annoying is having long requests hang (like a report running) that causes your entire app to appear to freeze up! Now we can create the HTML file for the login page. Create a new file at `app/views/login/index.latte` and put in the following code: ```html {extends '../layout.latte'} {block content} <h1>Login</h1> <form action="{route('login_authenticate')}" method="post"> <p>Login as whoever! And the password is always "password" (no quotes)</p> <label for="username">Username:</label> <input type="text" name="username" id="username" required> <label for="password">Password:</label> <input type="password" name="password" id="password" required> <button type="submit">Login</button> </form> {/block} ``` Lastly, we just need a link to our new login page (and a logout one while we're at it)! Let's add a link to the `app/views/blog/index.latte` file just after the `{/foreach}` loop: ```html <p><a href="{route('login')}">Login</a> - <a href="{route('logout')}">Logout</a></p> ``` Umm...wait, so we can login as anyone?! That's not very secure and you're right! We're only doing this for demonstration purposes. Of course we would want to have a system where we use `password_hash('my super cool password', PASSWORD_BCRYPT)` to hash the password and then store that in the database. But that's a topic for another blog post! So we now have a login system in place. But what if we want to make sure that only logged in users can access the blog? We can use [middleware](https://docs.flightphp.com/learn/middleware) to help us with that! A middleware is a piece of code that runs before or after a route. We can use middleware to check if a user is logged in and if they are not, we can redirect them to the login page. Let's create a new file at `app/middlewares/LoginMiddleware.php`: ```php <?php declare(strict_types=1); namespace app\middlewares; use flight\Engine; class LoginMiddleware { /** @var Engine */ protected Engine $app; public function __construct(Engine $app) { $this->app = $app; } public function before(): void { if ($this->app->session()->exist('user') === false) { $this->app->redirect($this->app->getUrl('login')); } } } ``` Now that we are able to use sessions, we actually can inject them as globals into our templates. Let's go to the `services.php` file and change our `render` method to the following: ```php $app->map('render', function(string $templatePath, array $data = [], ?string $block = null) use ($app, $Latte) { $templatePath = __DIR__ . '/../views/'. $templatePath; // Add the username that's available in every template. $data = [ 'username' => $app->session()->getOrDefault('user', '') ] + $data; $Latte->render($templatePath, $data, $block); }); ``` > **Note:** One thing that's important when injecting a variable at this point is that it becomes "global". Global variables in general are bad if they are not injected properly. Don't inject the whole session, but instead inject the specific variable you need. In this case, we only need the username. Globals can be bad, you've been warned! Now we can run checks in our templates to see if the user is logged in and if we want to show certain elements or not. For example, in the `app/views/blog/index.latte` file, we can add the following code: ```html {if $username} <p><a class="button" href="{route('blog_create')}">Create a new post</a></p> {/if} ``` If the user isn't logged in, that button won't show! Pretty cool eh? #### But wait, there's more! So, wait, remember that handy dandy debug bar called Tracy? There's an extension for it that we can take advantage of to inspect our session variables. Let's go to the `config.php` file and change a line of code: ```php (new TracyExtensionLoader($app)); // change it to... (new TracyExtensionLoader($app, [ 'session_data' => (new \Ghostff\Session\Session)->getAll() ])); ``` While we're at it, you get a free bonus of a built in Latte extension (cause you've read all the way to down here!). Go to your `services.php` file and add this line after the `$Latte->setTempDirectory(__DIR__ . '/../cache/');` line: ```php // PHP 8+ $Latte->addExtension(new Latte\Bridges\Tracy\TracyExtension); // PHP 7.4 Latte\Bridges\Tracy\LattePanel::initialize($Latte); ``` Here's some pictures of the various Tracy Extensions: See how helpful it is to see the query that's run, and to see where the query was ran so you can trace it down???  Here's Latte to help you know the template you're using.  And here's the session data. Obviously if we had more session data this would be more useful.  ### Permissions Now that we can see that we are logged in or not, maybe there are more fine grained permissions that we need to look at. For instance, can only certain people after logging in edit a blog post? Can certain people delete? Now we can create user roles for your blog such as `user` (anyone can view the blog and make a comment), `editor` (only you can create/edit a post) and `admin` (you can create, update and delete a post/comment). Flight has a package for [permissions](https://docs.flightphp.com/awesome-plugins/permissions) that we can use. Let's install it with composer: ``` composer require flightphp/permissions ``` Now we can add the permissions service to our `services.php` file: ```php // Permissions $currentRole = $app->session()->getOrDefault('role', 'guest'); $app->register('permission', \flight\Permission::class, [ $currentRole ]); $permission = $app->permission(); $permission->defineRule('post', function(string $currentRole) { if($currentRole === 'admin') { $permissions = ['create', 'read', 'update', 'delete']; } else if($currentRole === 'editor') { $permissions = ['create', 'read', 'update']; } else { $permissions = ['read']; } return $permissions; }); $permission->defineRule('comment', function(string $currentRole) { if($currentRole === 'admin') { $permissions = ['create', 'read', 'update', 'delete']; } else if($currentRole === 'editor') { $permissions = ['create', 'read', 'update']; } else { $permissions = ['read']; } return $permissions; }); ``` Also let's change some of the `LoginController->authenticate()` method to add the user role to the session: ```php if($postData->password === 'password') { $this->session()->set('user', $postData->username); // Sets the current user role if($postData->username === 'admin') { $this->session()->set('role', 'admin'); } else if($postData->username === 'editor') { $this->session()->set('role', 'editor'); } else { $this->session()->set('role', 'user'); } $this->session()->commit(); $this->redirect($this->getUrl('blog')); exit; } ``` > **Note:** This is a very simple example of how you can set roles. In a real world application, you would have a database table (or something) that would store the user roles and you would query the database to get the user role. For illustrative purposes, your user role in our blog application will be determined by the username you use to login. We can also create another function in Latte to help use utilize these permissions. Let's go to the `services.php` file and add another function after the `route` function: ```php $Latte->addFunction('permission', function(string $permission, ...$args) use ($app) { return $app->permission()->has($permission, ...$args); }); ``` Now we can use the `permission` function in our templates. Let's go to the `app/views/blog/index.latte` file and add a permission to the create button to check if you really can create a blog post or not: ```html {if $username && permission('post.create')} <p><a class="button" href="{route('blog_create')}">Create a new post</a></p> {/if} ``` You can now add additional permissions checks for reading, updating, and deleting posts. Go ahead to the login page and login as `admin` and `password`. Then try it with `user` and `password` and notice the differences! ### Active Record Improvements The active record class is relatively simple, but it has a few tricks up its sleeve. For instance we can have certain events trigger behaviors for us automatically (like adding an `updated_at` timestamp when we update a record). We also can connect records together by defining relationships in the active record class. Let's go to the `app/records/PostRecord.php` file and you can paste in the following code: ```php <?php declare(strict_types=1); namespace app\records; use app\records\CommentRecord; use Flight; /** * ActiveRecord class for the posts table. * @link https://docs.flightphp.com/awesome-plugins/active-record * * @property int $id * @property string $title * @property string $content * @property string $username * @property string $created_at * @property string $updated_at * @method CommentRecord[] comments() */ class PostRecord extends \flight\ActiveRecord { /** * @var array $relations Set the relationships for the model * https://docs.flightphp.com/awesome-plugins/active-record#relationships */ protected array $relations = [ 'comments' => [self::HAS_MANY, CommentRecord::class, 'post_id'], ]; /** * Constructor * @param mixed $databaseConnection The connection to the database */ public function __construct($databaseConnection = null) { $databaseConnection = $databaseConnection ?? Flight::db(); parent::__construct($databaseConnection, 'posts'); } public function beforeInsert(): void { $this->created_at = gmdate('Y-m-d H:i:s'); $this->updated_at = null; } public function beforeUpdate(): void { $this->updated_at = gmdate('Y-m-d H:i:s'); } } ``` So let's talk about what's different. #### Relationships We've added a `protected array $relations` property to the class. This is a way to [define relationships between records](https://docs.flightphp.com/awesome-plugins/active-record#relationships). In this case, we've defined a `comments` relationship. This is a `HAS_MANY` relationship, meaning that a post can have many comments. The `CommentRecord::class` is the class that represents the comments table, and the `post_id` is the foreign key that links the comments to the posts. What this will allow us to do is in our code we can save a lot of headache but just doing `$post->comments()` and it will return all the comments for that post. For example, in the `PostController` we can change the `show` method to the following: ```php /** * Show * * @param int $id The ID of the post * @return void */ public function show(int $id): void { $PostRecord = new PostRecord($this->db()); $post = $PostRecord->find($id); // Don't need these as it now will "just work" with the relationship we've defined // $CommentRecord = new CommentRecord($this->db()); // $post->comments = $CommentRecord->eq('post_id', $post->id)->findAll(); $this->render('posts/show.latte', [ 'page_title' => $post->title, 'post' => $post]); } ``` Super cool right? You'll also notice the `@method CommentRecord[] comments()` in the docblock. This is a way to tell your IDE that the `comments()` method will return an array of `CommentRecord` objects giving you a ton of help with autocompletion and type hinting. > **Note:** This is a very simple example of a relationship. In a real world application, you would have more complex relationships such as `HAS_ONE`, `BELONGS_TO`, and `MANY_MANY`. You can read more about relationships [here](https://docs.flightphp.com/awesome-plugins/active-record#relationships). > **Performance Note:** Relationships are great for single records, or for small collections of records. Just remember the fact that everytime you do `->comments()` it will run a query to get the comments. If you have say a query to pull back all the posts for your blog which are say 10 posts, and then put that in a foreach loop, you will have 1 query for your posts, and then 1 query for each of your 10 posts to get the comments. This is called the N+1 problem. It's not a bad problem in a small codebase, but in a large codebase it can be a big problem! #### Events Instead of coding in the date that needs to be assigned to every record, we can actually take care of that automatically through events! Above you'll notice there is now a `beforeInsert` and `beforeUpdate` method. These are example [event methods](https://docs.flightphp.com/awesome-plugins/active-record#events) that are called before the record is inserted or updated. This is a great way to add some default values to your records without having to remember to do it every time. So in the `PostController` we can remove the lines that set the `created_at` and `updated_at` fields like below (cause they'll now be filled in automatically): ```php $PostRecord = new PostRecord($this->db()); $PostRecord->find($id); $PostRecord->title = $postData->title; $PostRecord->content = $postData->content; // $PostRecord->updated_at = gmdate('Y-m-d H:i:s'); $PostRecord->save(); ``` One other thing that's really helpful with events is that you can automatically hash/encrypt/encode values and decrypt/decode values when you pull out records automatically. For instance in a `UserRecord->beforeInsert()` method you could has the password before it's inserted into the database: ```php public function beforeInsert(): void { $this->password = password_hash($this->password, PASSWORD_BCRYPT); } ``` #### Auto Create the Database Connection You'll notice that we've changed the constructor to accept no argument and that if `$databaseConnection` is `null` it will automatically use the global `Flight::db()` connection. This is a nice little feature that allows you to not have to pass in the database connection every time you create a new record and reduces precious keystrokes on your fingies. ```php public function __construct($databaseConnection = null) { $databaseConnection = $databaseConnection ?? Flight::db(); parent::__construct($databaseConnection, 'posts'); } ``` So now you can just do `$PostRecord = new PostRecord();` and it will automatically use the global database connection. But when unit testing you can inject a mock connection to test your active record class. ### Reactify/Vueify/Angularify We totally could have put some JavaScript framework in this project and changed our routes to be `->put()` or `->delete()` instead. This tutorial was just to help you grasp a basic understanding of how the framework works. Go ahead and throw some fancy JS into it in your own blog post! ## Conclusion This was a longer couple of posts, but you made it! Hopefully this illustrated some of the amazing things that Flight can do for you. It's a very lightweight framework that can be extended to do a lot of things. It's not as feature rich as Laravel or Symfony, but it's not trying to be. It's trying to be a simple framework that you can use to understand why you need a framework in the first place. Do yourself a favor and smash that subscribe button and pat yourself on the back cause you're worth it! You work hard at reading long blog posts about creating blog....posts. :D Leave a comment with any questions or catch us [in our chat room](https://matrix.to/#/#flight-php-framework:matrix.org)

n0nag0n

Unlocking the Power of Prisma with PostgreSQL

Prisma has revolutionized database access for developers with its intuitive ORM (Object-Relational...

https://dev.to/pritom_roy_1f196a4333286c/unlocking-the-power-of-prisma-with-postgresql-22ke

Prisma has revolutionized database access for developers with its intuitive ORM (Object-Relational Mapping) capabilities. It seamlessly integrates with PostgreSQL, allowing developers to define data models using a declarative schema syntax. This not only simplifies database management but also enhances productivity by automating many common tasks such as query generation and schema migrations. The PostgreSQL Advantage PostgreSQL, known for its reliability and feature-rich capabilities, complements Prisma perfectly. It supports complex queries, JSONB data types, full-text search, and ACID compliance, making it suitable for a wide range of applications from small-scale projects to enterprise-level systems. Integration and Performance Together, Prisma and PostgreSQL offer exceptional performance and scalability. Prisma's efficient query engine optimizes database interactions, while PostgreSQL's ability to handle concurrent transactions and large datasets ensures smooth operation even under heavy loads.

pritom_roy_1f196a4333286c

Learn to Create SVG by Coding in Minutes

Learn full SVG creating by coding and adding effects to it like animations. Scalable Vector...

https://dev.to/halimshams/learn-to-create-svg-by-coding-in-minutes-4955

coding, svgcoding, animation, webdev

**_Learn full SVG creating by coding and adding effects to it like animations._**  Scalable Vector Graphics or SVG is an image format that is like HTML for 2d graphics. They differ from raster images like PNG, JPEG… that is use a grid of tiny pixels to create an image and as you zoom in, the pixels become larger making the image grainy in contrast, a vector image can be scaled to any size without losing its resolution because instead of fixed pixels its appearance is based on geometry.  You can make SVG by tools like Figma or illustrator, or by writing the code directly, which is easier than you might think and opens the door to animation and interactivity. Create one by opening an SVG tag, then define a coordinate system with the _“viewBox”_ attribute that gives us a frame with a _“width”_ and _“height”_ of 100 units on which we can draw graphics.  Draw basic shapes by adding elements like rectangle, circle and polygon.  Position the rectangle by its _“x-y”_ values on the _“viewBox”_, then give it a size which can take value that are either explicit or responsive, we can change the color of the shape by defining its _“fill”_ or define an outline with the _“stroke”_ attribute.  And if our styling gets too complex, we can extract everything into a separate CSS stylesheet, by applying a class to it just like any HTML element.  We have the full power of CSS at our fingertips, which means we can react to events on the shapes and then change their styling or animation accordingly.  But most graphics are more than just basic shapes, they contain complex art work with all kinds of twists and turns, and that’s where the path element comes in. The shape of a path is determined by one attribute _“d”_ for draw. Coding a path is like controlling the tip of a pen with a series of commands. The most basic command is _“M”_ for move which will move the pen tip to an _“x-y”_ coordinate, an upper letter means move relative to the view box and a lowercase letter means move relative to the last point in the path, but _“move (M)”_ doesn’t draw anything.  To put the pen tip down on the paper and draw something use the _“I”_ command, it works exactly like _“move”_ but draws a line that can be styled.  Straight lines are cool but what if we wanted to add a curve like we would with the handles in illustrator, Create Bézier curves with the _“C”_ and _“Q”_ commands, define the position of two control points, then _“x”_ and _“y”_ coordinates where the curve should end, then SVG will automatically calculate a smooth curve for you at any scale.  --- This was **SVG** (Scalable Vector Graphics) in minutes. Hope reading this short article helped you to know what really SVG is and able to create a simple SVG. 😊 Don’t forget to support and inspire me by just following me, clapping and sharing your experience in the comment section. 🥰 Thanks for reading till the end and if you see any issue with this article you can share with me in the comments. 🙏 > … HAPPY CODDING :) … — You can follow me on [Twitter/X](https://x.com/HalimOFFI) also.😊 — Check out my [newsletter](https://halimshams.substack.com/) as well! 💛

halimshams

.NET tarixi va versiyalari

.Net bu Microsoft tomonidan ishlab chiqarilgan - Kross platforma, open source va dasturchilar uchun...

https://dev.to/shoxjaxon1202/net-tarixi-2ppf

dotnet, csharp, tutorial, basic

.Net bu **Microsoft** tomonidan ishlab chiqarilgan - Kross platforma, open source va dasturchilar uchun IOT, Mobile, Desktop, Web, Game turdagi maxsulotlar ishlab chiqish uchun bepul platforma hisoblanadi. ``  **.NET tillari** Siz .NET ilovalarini ishlab chiqish uchun C#, F#, Visual Basic tillaridan foydalanishingiz mumkin. Barcharga ma'lumki, .NET frameworklarining 3 turi hozirda faoliyatda. ".NET Framework", ".NET Core", ".NET5". Uchchala frameworkda ham SDK va Runtime bor. .NET SDK - dasturning qurilishi va ishga tushishini taminlaydi. .NET Runtime - Dasturning ishga tushishini taminlaydi xolos. Aytmoqchimanki, SDK o'zining ichiga Runtime ni ham oladi. Agar o'zining ichiga olsa nega kerak? Barchamizga ma'lum .NET platformasida yozilgan ilovalarni ishga tushirish uchun .NET Runtime lari kerak bo'ladi. Bu sizga C++ emas. Istalgan kompyuterda ishga tushib ketaveradigan. Ya'ni Windows tizimi kompyuterga yangi o'rnatilgan paytda C++ Runtime lari bo'ladi. Shuning uchun C++ da yozilgan ilovalarni ishga tushirishda xech qanday so'rov bo'lmaydi. Mana endi sekin sekin Windowsning yangi versiyalarida .NET frameworklari ko'zga ko'rinyapti. .Net dan foydalanish > .Net dan foydalanish uchun avvalambor biz sdk o'rnatib olishimiz kerak u bizga loyiha yaratishda ko'p qulayliklarni beradi. Uni o'rnatish uchun brauzerga Microsoft dotnet sdk deb yozish kerak va uni versiyasini yozib oxirida download so'zini yozasiz. Ekranda birinchi bo'lib Microsoftning o'zini afitsialniy sayti chiqadi shu saytni download bo'limi orqali kirib siz sdk ni yuklashingiz mumkin. _ Eslatma : kompyuter razryadi 64 bo'lishi kerak 32 yoki 16 razryadli kompyuterlar orqali sdk ni o'tkazib bo'lmaydi._ **.NET tarixi** NET Framework — 2002-yilda Microsoft tomonidan chiqarilgan dasturiy platformadir. Platforma turli dasturlash tillari: C#, Visual Basic .NET, J# va boshqalar uchun mos Common Language Runtime (CLR)ga asoslangan. CLR funksiyasi ushbu platformadan foydalanadigan har qanday dasturlash tilida mavjud. .NET Framework hozirda.NET sifatida rivojlanmoqda. Bu platformada koʻp dasturlarga umumiy komponentlar va optimizatsiyalangan metodlar bor. NET Framework oʻsha paytda mashhur boʻlgan Sun Microsystems (hozirda Oracle kompaniyasiga tegishli) Java platformasiga Microsoftning javobidir. .NET Framework Microsoft kompaniyasining oʻz mahsuloti hisoblanib, rasmiy ravishda Windows operatsion tizimlarida ishlash uchun moʻljallangan boʻlsa-da, baʼzi boshqa operatsion tizimlarda.NET Framework dasturlarini ishga tushirish imkonini beruvchi mustaqil loyihalar (birinchi navbatda Mono va Portable.NET) mavjud.

shoxjaxon1202

App Development with Stable Diffusion Model

1. Introduction The integration of AI models like Stable Diffusion into app development...

https://dev.to/rapidinnovation/app-development-with-stable-diffusion-model-37b8

## 1\. Introduction The integration of AI models like Stable Diffusion into app development marks a transformative era in how applications are designed, developed, and deployed. Stable Diffusion specializes in generating high-quality images from textual descriptions, enhancing user engagement and creativity. ## 2\. What is Stable Diffusion Model? The Stable Diffusion Model is a generative AI model designed to create high- quality images from textual descriptions. It uses latent diffusion to transform text into detailed images, making it efficient and rapid in generating photorealistic images. ## 3\. Types of Applications Using Stable Diffusion Model Stable Diffusion is used in various applications: ## 4\. Benefits of Integrating Stable Diffusion Model in Apps Integrating Stable Diffusion offers several benefits: ## 5\. Challenges in Implementing Stable Diffusion Model Implementing Stable Diffusion comes with challenges such as technical hurdles, ethical and privacy concerns, and resource management. Addressing these is crucial for successful deployment. ## 6\. Future of App Development with AI Models like Stable Diffusion The future of app development with AI models like Stable Diffusion is dynamic and impactful, driven by advancements in technology and changing user expectations. Trends include increased AI-driven automation, enhanced personalization, and improved natural language processing. ## 7\. Real-World Examples of Apps Using Stable Diffusion Examples include: ## 8\. In-Depth Explanations Stable Diffusion's technical architecture involves deep learning frameworks and cloud-based services. Integration techniques include containerization, microservices architecture, and efficient data flow management. ## 9\. Comparisons & Contrasts Stable Diffusion stands out for its open-source nature and efficiency compared to other AI models like DALL-E. However, it also faces limitations such as ethical concerns and potential biases. ## 10\. Why Choose Rapid Innovation for Implementation and Development Rapid Innovation offers expertise in AI and Blockchain, a proven track record with innovative solutions, and a customized development approach, making it a strategic choice for businesses. ## 11\. Conclusion The future outlook for businesses involves technological adoption, sustainability focus, and economic adaptability. Companies that navigate these areas effectively will be well-positioned for success. 📣📣Drive innovation with intelligent AI and secure blockchain technology! Check out how we can help your business grow! [Blockchain App Development](https://www.rapidinnovation.io/service- development/blockchain-app-development-company-in-usa) [Blockchain App Development](https://www.rapidinnovation.io/service- development/blockchain-app-development-company-in-usa) [AI Software Development](https://www.rapidinnovation.io/ai-software- development-company-in-usa) [AI Software Development](https://www.rapidinnovation.io/ai-software- development-company-in-usa) ## URLs * <https://www.rapidinnovation.io/post/app-development-with-stable-diffusion-model> ## Hashtags #Here #are #five #relevant #hashtags #for #the #provided #text: #1. #AppDevelopment #2. #StableDiffusion #3. #AIinTech #4. #PersonalizedContent #5. #FutureOfAI

rapidinnovation

Online oci services in canada

Discover seamless and efficient online OCI services in Canada. Apply for your Overseas Citizenship of...

https://dev.to/pan_card_canada_/online-oci-services-in-canada-738

Discover seamless and efficient online OCI services in Canada. Apply for your Overseas Citizenship of India (OCI) card with ease through our user-friendly platform. [https://www.pancardcanada.com/promotion.php](https://www.pancardcanada.com/promotion.php)

pan_card_canada_

On-call Manual: Measuring the quality of the on-call

Reasonable on-call is no accident. Getting there requires a lot of hard work. But how can you tell if...

https://www.growingdev.net/p/on-call-manual-measuring-the-quality

oncall, softwareengineering, career, devops

Reasonable on-call is no accident. Getting there requires a lot of hard work. But how can you tell if you’re on the right track if the experience can completely change from one shift to another? One answer to this question is **monitoring**. ## How does monitoring help? At the high level, monitoring can tell you if the on-call duty is improving, staying the same, or deteriorating over a longer period. Understanding the trend is important to decide whether the current investment in keeping the on-call reasonable is sufficient. At the more granular level, monitoring allows identifying areas that need attention the most, like: - noisy alerts - problematic dependencies - features causing customers’ complaints - repetitive tasks Continuously addressing the top issues will gradually improve the overall on-call experience. ## What metrics to monitor There is no one correct answer to what metrics to monitor. It depends a lot on what the team does. For example, frontend teams may choose to monitor the number of tickets opened by the customers, while backend teams may want to focus more on time spent on fixing broken builds or failing tests. Here are some metrics to consider: - outages of the products the team owns - external incidents impacting the products the team owns - the number of alerts, broken down by urgency - the number of alerts alerts acted on and ignored - the number of alerts outside the working hours - time to acknowledge alerts - the number of tickets opened by customers - the number of internal tasks - build breaks - test failures ## How to monitor? On-call monitoring is difficult because there isn’t a single metric that can reflect the health of the on-call. My team uses quantitative (data) and qualitative metrics (opinions). ### Qualitative metrics Quantitative metrics can usually be collected from alerting systems, bug trackers, and task management systems. Here are a few examples of quantitative metrics we are tracking on our team: - the number of alerts - the number of tasks - the number of alerts outside the working hours - the noisiest alerts, tracked by alert ID  As quantitative metrics are collected automatically, we built a dashboard to show them in an easy-to-understand way. Keeping historical data allows us to track trends. ### Qualitative metrics Qualitative metrics are opinions about the shift from the person ending the shift. Using qualitative metrics in addition to quantitative metrics is necessary because numbers are sometimes misleading. Here is an example: handling a dozen tasks that can be closed almost immediately without much effort is easier than collaborating with a few teams to investigate a hard-to-reproduce customer report. However, considering only how many tasks each on-call got during their shift, the first shift appears heavier than the second. On our team, each person going off-call fills out an On-call survey that is part of the On-call report. Here are some of the questions from the survey: - Rate your on-call experience from 1 to 10 (1: easy, 10: horrible) - Rate your experience with resources available for resolving on-call issues (e.g., runbooks, documentation, tools, etc.) from 1 to 10 (1: no resources or very poor resources, 10: excellent resources that helped solve issues quickly) - How much time did you spend on urgent activities like alerts, fire fighting, etc. (0%-100%)? - How much time did you spend on non-urgent activities like non-urgent tasks, noise, etc. (0%-100%)? - Additional comments (free flow) We’ve been conducting this survey for a couple of years now. One interesting observation I made is that it is not uncommon for a horrible shift for one person to be decent for someone else. Experienced on-calls usually rate their shifts easier than developers who just finished their first shift. This is understandable. We still treat all opinions equally—improving the on-call quality for one person improves it for everyone. The *Additional comments* question is my favorite as it provides insights no other metric can capture. ## Call to Action If being on-call is part of your team’s responsibilities and you don’t monitor it, I highly encourage you to start doing so. Even a simple monitoring system will tell you a lot about your on-call and allow you to improve it by addressing the most annoying issues. --- 💙 If you liked this article... I publish a weekly newsletter for software engineers who want to grow their careers. I share mistakes I’ve made and lessons I’ve learned over the past 20 years as a software engineer. Sign up here to get articles like this delivered to your inbox: https://www.growingdev.net/

moozzyk

Javascript is a Sea, and You are in a Life Jacket

Navigating the Vast and Ever-Evolving World of JavaScript Introduction JavaScript is a sea, and you...

https://medium.com/@burhanuddinhamzabhai/javascript-is-a-sea-and-you-are-in-a-life-jacket-fc727ae82416

javascript, webdev, coding

Navigating the Vast and Ever-Evolving World of JavaScript **Introduction** JavaScript is a sea, and you are in a life jacket. The analogy might sound dramatic, but if you’ve ever dived into JavaScript development, you know it fits. From its humble beginnings to becoming one of the most powerful and versatile programming languages in the world, JavaScript has grown into an ocean of frameworks, libraries, and tools. Whether you’re a beginner or an experienced developer, it’s crucial to know how to navigate these waters without feeling overwhelmed. **Understanding the Basics** Before setting sail, you need to understand the fundamentals of JavaScript. The core language itself is relatively simple, but its ecosystem can be daunting. Focus on mastering the basics: - Variables and Data Types: Understand how to declare variables using var, let, and const, and get familiar with JavaScript's data types like strings, numbers, and objects. - Functions and Scope: Learn how to define and invoke functions, and grasp the concept of scope and closures. - DOM Manipulation: Get comfortable with selecting and modifying HTML elements using JavaScript. **The Framework Frenzy** Once you’re comfortable with the basics, you might be tempted to dive into frameworks. React, Angular, Vue.js — the list goes on. Each framework has its own strengths and community, and choosing one can feel like picking a boat in a bustling harbor. Here are a few tips to help you decide: - Project Requirements: Consider what your project needs. React is great for highly interactive UIs, while Angular offers a comprehensive solution with built-in features. - Learning Curve: Assess how steep the learning curve is. Vue.js, for instance, is known for its gentle learning curve and ease of integration. - Community and Support: A large, active community means more resources, tutorials, and plugins to help you out. **Staying Afloat with Tools and Libraries** JavaScript is rich with tools and libraries designed to make your life easier. However, knowing which ones to use is crucial. Here are some essentials: - Webpack and Babel: These tools help you bundle your JavaScript files and ensure compatibility across different browsers. - ESLint and Prettier: Keep your code clean and consistent with these linters and formatters. - Testing Libraries: Jest and Mocha are popular choices for testing your code to ensure it works as expected. **Continuous Learning and Adaptation** JavaScript is a rapidly evolving sea. New frameworks, libraries, and best practices emerge frequently. To stay afloat, continuous learning is vital: - Follow Blogs and Tutorials: Sites like Medium, Dev.to, and CSS-Tricks offer valuable insights and tutorials. - Participate in Communities: Engage with other developers on platforms like Stack Overflow, GitHub, and Reddit. - Attend Conferences and Meetups: Events like JSConf and local meetups provide opportunities to learn from experts and network with peers. **Conclusion** Navigating the vast sea of JavaScript can be challenging, but with the right mindset and tools, you can keep afloat and steer your career in the right direction. Remember, every expert was once a beginner, and continuous learning is your best life jacket. > “In the vast ocean of JavaScript, let continuous learning be your life jacket, keeping you afloat and guiding you to new horizons.” — [**_Burhanuddin Mulla Hamzabhai_**](https://medium.com/@burhanuddinhamzabhai)

burhanuddin

Building a Simple Blog with Flight - Part 1

Hey everyone! I figured it was time to showcase some of the new features that have been added to the...

https://dev.to/n0nag0n/building-a-simple-blog-with-flight-part-1-4ap8

php, tutorial, blog, api

Hey everyone! I figured it was time to showcase some of the new features that have been added to the Flight Framework for PHP. Earlier this year the original creator of Flight [Mike Cao](https://x.com/caozilla) graciously offered to transfer ownership of [mikecao/flight](https://github.com/mikecao/flight) over to a new [Flight PHP](https://github.com/flightphp) organization. Since it's been moved we've added features like [middleware](https://docs.flightphp.com/learn/middleware), [route grouping](https://docs.flightphp.com/learn/routing#route-grouping), [DIC](https://docs.flightphp.com/learn/dependency-injection-container), and other features. This post will be a little longer, but it's just because I've included a lot of code examples so you can have the right context into how your blog will get built. First off, let's just get this out of the way. Flight is meant to be a simple framework with a few bells and whistles. It will not compete with Laravel or Symfony or Yii or Cake or [fill in the blank]. This framework is really built towards simple to medium size projects. It also caters to those who don't like "magic" in their code that's hard to understand or train to. It's geared more towards developers who are just starting to branch into frameworks instead of raw PHP with a lot of random `include` statements. ### tl;dr Lots of cool features, nice simple implementation, blah blah blah [here's the code](https://github.com/n0nag0n/flightphp-blog). Go to [part 2](https://dev.to/n0nag0n/building-a-simple-blog-with-flight-part-2-5acb) for the cool stuff! ## Installation Let's use [Composer](https://getcomposer.org) to get this party started. ``` composer create-project flightphp/skeleton blog/ cd blog/ ``` ## Configure your New Project First thing to do is to go to the `app/config/config.php` file where we can put any config like API keys, database credentials, and other important credentials for our app. For this blog, we'll uncomment the line with `file_path` for our SQLite database path: ```php return [ 'database' => [ // 'host' => 'localhost', // 'dbname' => 'dbname', // 'user' => 'user', // 'password' => 'password' 'file_path' => __DIR__ . $ds . '..' . $ds . 'database.sqlite' ], ]; ``` ### Create the Blog Database Flight now comes with a command line utility called [runway](https://github.com/flightphp/runway). This allows you to create custom commands for a plugin for Flight, or even for your own project. As part of the skeleton, it comes with a `SampleDatabaseCommand` that will give us a starting point with this blog project we are creating. Run the below command and it should populate your database for you! ``` php runway init:sample-db ``` Next we'll open up the `app/config/services.php` file and uncomment the line for SQLite. ```php // see how the $config variable references the config line we uncommented earlier? $dsn = 'sqlite:' . $config['database']['file_path']; ``` Just to make sure we've got everything setup correctly, run `composer start` and then go to `http://localhost:8000/` in your browser. You should see the following screen:  You'll also notice in the corner you have a [handy debug toolbar](https://tracy.nette.org/) with some custom Flight panels to help you understand what's going on in your application. If you hover over the various items in the toolbar, you'll see a variety of hovers that you can click on to keep sticky on the page (more on that later).  ### Building the HTML Templates Flight does come with a [very basic HTML templating](https://docs.flightphp.com/learn/templates) solution already in the framework. This is just fine for very simple sites or just to return a simple piece of HTML. It is recommended to use another templating platform such as Latte, Twig, or Blade. In this tutorial, we're going to use Latte because it is *awesome* and has no dependencies (you'll notice in Flight we do not like unnecessary dependencies)! Go ahead and install [Latte](https://docs.flightphp.com/awesome-plugins/latte) ``` composer require latte/latte ``` Add this to your `services.php` ```php $Latte = new \Latte\Engine; $Latte->setTempDirectory(__DIR__ . '/../cache/'); // This is fun feature of Flight. You can remap some built in functions with the framework // to your liking. In this case, we're remapping the Flight::render() method. $app->map('render', function(string $templatePath, array $data = [], ?string $block = null) use ($app, $Latte) { $templatePath = __DIR__ . '/../views/'. $templatePath; $Latte->render($templatePath, $data, $block); }); ``` Now that we have a templating engine in place, we can create a base HTML file. Let's create a `layout.latte` file: ```html <!doctype html> <html lang="en"> <head> <!-- Picnic.css is a CSS framework that works out of the box with little configuration --> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/picnic"> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>{$page_title ? $page_title.' - '}Blog Built with Flight!</title> </head> <body style="padding: 15px;"> {block content}{/block} </body> </html> ``` ### Active Record Database Class Flight has a plugin for interacting with a database called [Flight Active Record](https://docs.flightphp.com/awesome-plugins/active-record). This plugin helps you not write as much raw SQL in your apps (although sometimes it is more efficient to write a raw SQL query instead of forcing an active record/ORM/mapper to run it for you). Basically the active record extension helps you interact with rows within tables in your database: one row in a database can be mapped to an object in PHP (with autocomplete for the columns) saving time and sanity. Let's get it installed in our project. ``` composer require flightphp/active-record ``` Now you can use `runway` to create your active record classes automatically for you and it will create your properties as comments automatically (for autocomplete)! First let's create the posts class. The first time you run this, it needs to setup the connection for the database. ``` $ php runway make:record posts Database configuration not found. Please provide the following details: Driver (mysql/pgsql/sqlite): sqlite Database file path [database.sqlite]: app/database.sqlite Username (for no username, press enter) []: Password (for no password, press enter) []: Writing database configuration to .runway-config.json Creating directory app/records Active Record successfully created at app/records/PostRecord.php ``` Now we'll create the comments record class: ``` $ php runway make:record comments ``` ## It's Time for your First Page! Flight uses the MVC pattern. In order to create a new page you need to define a route in your `routes.php` file, create a new method in a controller, and then create the HTML file that the browser will serve. You can use runway to help you get started with a new controller class: ``` php runway make:controller Home ``` And you should see something similar to the following: ``` $ php runway make:controller Home Controller successfully created at app/controllers/HomeController.php ``` If you go to `app/controllers/HomeController.php` go ahead and add this new method to your `HomeController`: ```php /** * Index * * @return void */ public function index(): void { $this->app->render('home.latte', [ 'page_title' => 'Home' ]); } ``` And create a new file in `app/views/home.latte` and put in this code: ```html {extends 'layout.latte'} {block content} <h1>My Home Page</h1> <p><a href="/blog">View My Blog!</a></p> {/block} ``` Finally let's change up the routes to the `routes.php` file. Go ahead and remove any code in the routes file that begins with `$router->` and add a new route for your home router: ```php $router->get('/', \app\controllers\HomeController::class . '->index'); ``` Make sure you run `composer start` so that your development server is up. If you go to `http://localhost:8000/` in your browser, you should see something like this!  Now we're cookin'! ## Adding Routes for the Blog Let's go ahead and add all the methods in your controller, routes, and html files. Let's start with adding the routes in your `routes.php` file: ```php // Blog $router->group('/blog', function(Router $router) { // Posts $router->get('', \app\controllers\PostController::class . '->index'); $router->get('/create', \app\controllers\PostController::class . '->create'); $router->post('', \app\controllers\PostController::class . '->store'); $router->get('/@id', \app\controllers\PostController::class . '->show'); $router->get('/@id/edit', \app\controllers\PostController::class . '->edit'); $router->post('/@id/edit', \app\controllers\PostController::class . '->update'); $router->get('/@id/delete', \app\controllers\PostController::class . '->destroy'); }); ``` So you'll notice we use a `group()` method here to group all the routes together that start with `/blog`. We could actually rewrite the routes like the following with the `group()` method and the same thing would happen: ```php // Posts $router->get('/blog', \app\controllers\PostController::class . '->index'); $router->get('/blog/create', \app\controllers\PostController::class . '->create'); ``` With the controller, first let's create an empty controller with `runway`: ``` php runway make:controller Post ``` You can copy the code below for your `PostController.php`: ```php <?php declare(strict_types=1); namespace app\controllers; use app\records\CommentRecord; use app\records\PostRecord; use flight\Engine; class PostController { /** @var Engine */ protected Engine $app; /** * Constructor */ public function __construct(Engine $app) { $this->app = $app; } /** * Index * * @return void */ public function index(): void { $PostRecord = new PostRecord($this->app->db()); $posts = $PostRecord->order('id DESC')->findAll(); $CommentRecord = new CommentRecord($this->app->db()); foreach($posts as &$post) { $post->comments = $CommentRecord->eq('post_id', $post->id)->findAll(); } $this->app->render('posts/index.latte', [ 'page_title' => 'Blog', 'posts' => $posts]); } /** * Create * * @return void */ public function create(): void { $this->app->render('posts/create.latte', [ 'page_title' => 'Create Post']); } /** * Store * * @return void */ public function store(): void { $postData = $this->app->request()->data; $PostRecord = new PostRecord($this->app->db()); $PostRecord->title = $postData->title; $PostRecord->content = $postData->content; $PostRecord->username = $postData->username; $PostRecord->created_at = gmdate('Y-m-d H:i:s'); $PostRecord->updated_at = null; $PostRecord->save(); $this->app->redirect('/blog'); } /** * Show * * @param int $id The ID of the post * @return void */ public function show(int $id): void { $PostRecord = new PostRecord($this->app->db()); $post = $PostRecord->find($id); $CommentRecord = new CommentRecord($this->app->db()); $post->comments = $CommentRecord->eq('post_id', $post->id)->findAll(); $this->app->render('posts/show.latte', [ 'page_title' => $post->title, 'post' => $post]); } /** * Edit * * @param int $id The ID of the post * @return void */ public function edit(int $id): void { $PostRecord = new PostRecord($this->app->db()); $post = $PostRecord->find($id); $this->app->render('posts/edit.latte', [ 'page_title' => 'Update Post', 'post' => $post]); } /** * Update * * @param int $id The ID of the post * @return void */ public function update(int $id): void { $postData = $this->app->request()->data; $PostRecord = new PostRecord($this->app->db()); $PostRecord->find($id); $PostRecord->title = $postData->title; $PostRecord->content = $postData->content; $PostRecord->username = $postData->username; $PostRecord->updated_at = gmdate('Y-m-d H:i:s'); $PostRecord->save(); $this->app->redirect('/blog'); } /** * Destroy * * @param int $id The ID of the post * @return void */ public function destroy(int $id): void { $PostRecord = new PostRecord($this->app->db()); $post = $PostRecord->find($id); $post->delete(); $this->app->redirect('/blog'); } } ``` Let's kill some time and talk about a few things that are going on in the controller. First off we are now using our new active record classes: ```php $PostRecord = new PostRecord($this->app->db()); $posts = $PostRecord->order('id DESC')->findAll(); ``` We are injecting the database we setup in the `services.php` file above with `$this->app->db();`. Technically we could also just use `Flight::db()` as this points to the global `$app` variable. Active Record classes are really helpful to simplify interactions with a database. We could rewrite the above in the following code: ```php $posts = $this->app->db()->fetchAll("SELECT * FROM posts ORDER BY id DESC"); ``` This might not be the best example of how helpful an active record could be. But [in part 2](https://dev.to/n0nag0n/building-a-simple-blog-with-flight-part-2-22ol) I'll show you some hidden gems inside these classes that make it so much better than writing raw SQL. Now let's talk HTML files. Here are the files we'll need for the post routes: `app/views/posts/index.latte` ```html {extends '../layout.latte'} {block content} <h1>My Amazing Blog</h1> <p>Welcome to my blog!</p> <p><a class="button" href="/blog/create">Create a new post</a></p> {foreach $posts as $post} {first} <h2>Recent Posts</h2> {/first} <hr> <h3><a href="/blog/{$post->id}">{$post->title}</a></h3> <p><small>By: {$post->username} on {$post->created_at|date:'d.m.Y G:i a'}</small></p> <p>Comments: {count($post->comments)} <p>{$post->content|truncate:100}</p> <hr> <a class="pseudo button" href="/blog/{$post->id}/edit">Update</a> - <a class="pseudo button" href="/blog/{$post->id}/delete">Delete</a> {/foreach} {/block} ``` `app/views/posts/show.latte` ```html {extends '../layout.latte'} {block content} <a href="/blog">&lt; Back to blog</a> <h1>{$post->title}</h1> <p>Created by: {$post->username} on {$post->created_at|date:'d.m.Y G:i a'}.</p> <div> {$post->content|breakLines} </div> <p n:if="$post->update_at">Last update: {$post->update_at|date:'d.m.Y G:i a'}.</p> <h2>Comments</h2> {foreach $post->comments as $comment} <div> <p>{$comment->username} on {$comment->created_at|date:'d.m.Y G:i a'}.</p> <div> {$comment->content|breakLines} </div> <hr> <a class="pseudo button" href="/blog/{$post->id}/comment/{$comment->id}/delete">Delete</a> </div> {else} <p>No comments yet.</p> {/foreach} <h2>Add comment</h2> <form action="/blog/{$post->id}/comment" method="post"> <div> <label for="username">Username:</label> <input name="username" id="username" placeholder="Username" required /> </div> <div> <label for="content">Comment:</label> <textarea name="content" id="content" placeholder="Comment" required></textarea> </div> <div> <button type="submit">Add Comment</button> </div> </form> {/block} ``` `app/views/posts/create.latte` ```html {extends '../layout.latte'} {block content} <h1>Create a Post</h1> <form action="/blog" method="post"> <label><input type="text" name="title" placeholder="Title" required></label> <label><textarea name="content" placeholder="Content" required></textarea></label> <label><input type="text" name="username" placeholder="Username" required></label> <button type="submit">Create</button> </form> {/block} ``` `app/views/posts/edit.latte` ```html {extends '../layout.latte'} {block content} <h1>Update a Post</h1> <form action="/blog/{$post->id}/edit" method="post"> <label for="title">Title</label> <input type="text" name="title" placeholder="Title" value="{$post->title}" required> <label for="content">Content</label> <label><textarea name="content" placeholder="Content" required>{$post->content}</textarea> <label for="username">Username</label> <label><input type="text" name="username" placeholder="Username" value="{$post->username}" required> <button type="submit">Update</button> </form> {/block} ``` ## Create a new post Now that we've got all the pieces in place, you should be able to load up your blog page, create a new post, see a post, and delete a post. You may have noticed we've included a comment form but the form doesn't actually work. We can fix that real quick! Let's create a controller with `runway`: ``` php runway make:controller Comment ``` Now you can make the `CommentController.php` look like the following: ```php <?php declare(strict_types=1); namespace app\controllers; use app\records\CommentRecord; use flight\Engine; class CommentController { /** @var Engine */ protected Engine $app; /** * Constructor */ public function __construct(Engine $app) { $this->app = $app; } /** * Store * * @param int $id The post ID * * @return void */ public function store(int $id): void { $postData = $this->app->request()->data; $CommentRecord = new CommentRecord($this->app->db()); $CommentRecord->post_id = $id; $CommentRecord->username = $postData->username; $CommentRecord->content = $postData->content; $CommentRecord->created_at = gmdate('Y-m-d H:i:s'); $CommentRecord->updated_at = null; $CommentRecord->save(); $this->app->redirect('/blog/' . $id); } /** * Destroy * * @param int $id The post ID * @param int $comment_id The comment ID * * @return void */ public function destroy(int $id, int $comment_id): void { $CommentRecord = new CommentRecord($this->app->db()); $CommentRecord->find($comment_id); $CommentRecord->delete(); $this->app->redirect('/blog/' . $id); } } ``` Now let's add a couple other routes in the group chunk of code in `routes.php` ```php // Blog $router->group('/blog', function(Router $router) { // Posts // post routes... // Comments $router->post('/@id/comment', \app\controllers\CommentController::class . '->store'); $router->get('/@id/comment/@comment_id/delete', \app\controllers\CommentController::class . '->destroy'); }); ``` ## Conclusion (sort of) With these two additions to the code, you have a fully functioning blog built with Flight! This got the job done and you now have a blog, but the code is somewhat clunky and could be improved to have some pretty nifty features like middleware, permissions, and writing less code! [Hop over to part 2](https://dev.to/n0nag0n/building-a-simple-blog-with-flight-part-2-5acb) Go ahead and leave any questions in comments below or [join us in the chatroom](https://matrix.to/#/#flight-php-framework:matrix.org)! > If you want to see the final product with all the improvements [here's the code](https://github.com/n0nag0n/flightphp-blog)!

n0nag0n

BUG HUNTING ON scrapeAnyWebsite (SAW)

INTRODUCTION This project was carried out to explore the ScrapeAnyWebsite (SAW) App. A...

https://dev.to/umehifeanyi/exploratory-testing-of-scrapeanywebsite-saw-and-recommendation-for-app-improvement-5eoc

qa, testing, bug

## **INTRODUCTION** This project was carried out to explore the ScrapeAnyWebsite (SAW) App. A windows application designed to extract various data from any website. The app is meant to help users gather and organize data from the web efficiently. Download the app [Scrape Any Website](https://apps.microsoft.com/detail/9mzxn37vw0s2?hl=en-gb&gl=NG) and explore ## **OBJECTIVE** The aim of the exploration of this web application is to explore its functionalities to detect bugs, usability issues and possible inconsistencies in the app with core focus on bug severity in usability, performance and security to ensure delivery of quality product to end users. ## **SCOPE** Exploratory testing of the app for functionality, user navigation, UI issues, performance and data security and other vulnerabilities. ## **ENVIRONMENT** Desktop Windows 11 SAW desktop app 2.0 ## **ISSUES DETECTED** In the course of exploring the web application, the following were detected with the more detailed bug report available [here](https://docs.google.com/spreadsheets/d/1CZtbG_Rt0Cp35sRxa6kzZEVtgESxO_7RCwjVpQskQAA/edit?usp=sharing) **UI and Presentation:** The general presentation of the app page, navigation and presentation of its data is not clear, not user friendly and is not totally dynamic as it is not possible to scroll down to see the ending part of the page.This will pose a serious issue of usability for the users. **Invalid URL handling:** When setting up website to scrape, the app accepts any url typed in including invalid url without being promptd to enter a correct url. This poses a functionality and performance issue as user will not be able to scrape the website and returning back to correct url add to frustration for the user. **Option to analyse Scraped Data:** After inputting all neccessary information and scraping websites, there is no means of analysing the data because the values provided by the app are url, status, date, code and size. This prevent users from fully utilizing the potentials offered by the app posing a functionality issue. **Browser Option Switching:** Switch the browser option of the app from internet headless browser to Chrome via chromedriver did not produce any significant difference in data scraping and/or presentation of the scraped data. This makes the app ambiguous in functionality and can lead to user confusion. ## **CONCLUSION** The SAW app is a great tool that offers the service of scraping websites for users in order to meet their needs, however, the app needs some fine-tuning in terms of the bugs detected in the course of its exploration. This will enhance it functionality, usability, security of users data and general performance. For a more detailed report on the bugs detected click [here](https://docs.google.com/spreadsheets/d/1CZtbG_Rt0Cp35sRxa6kzZEVtgESxO_7RCwjVpQskQAA/edit?usp=sharing)

umehifeanyi

Empowering Minds: B.Sc. Programs That Transform Lives

In today's fast-paced and ever-evolving world, education plays a pivotal role in shaping the future....

https://dev.to/sheetalserco/empowering-minds-bsc-programs-that-transform-lives-18go

webdev, discuss

In today's fast-paced and ever-evolving world, education plays a pivotal role in shaping the future. Among various educational programs, the Bachelor of Science (B.Sc.) stands out as a transformative course that empowers minds and changes lives. A B.Sc. program not only imparts theoretical knowledge but also emphasizes practical skills, critical thinking, and problem-solving abilities. This article explores the profound impact of B.Sc. programs on individuals and society, highlighting how they transform lives and contribute to global progress. The Essence of a B.Sc. Program A B.Sc. program is a three to four-year undergraduate degree that focuses on science, technology, engineering, and mathematics (STEM) fields. These programs are designed to provide students with a solid foundation in their chosen discipline while fostering a comprehensive understanding of scientific principles. B.Sc. programs cover a wide range of subjects, including physics, chemistry, biology, mathematics, computer science, environmental science, and more. The multidisciplinary approach of these programs equips students with a diverse skill set that is highly valued in today's job market. Empowering Minds Through Education Developing Critical Thinking and Problem-Solving Skills One of the most significant benefits of a B.Sc. program is the development of critical thinking and problem-solving skills. Students are encouraged to analyze complex problems, formulate hypotheses, conduct experiments, and draw evidence-based conclusions. This scientific approach to problem-solving fosters a mindset that is analytical, logical, and innovative. Graduates of B.Sc. programs are well-equipped to tackle real-world challenges, making them valuable assets in various industries. Fostering Innovation and Research B.Sc. programs place a strong emphasis on research and innovation. Students have the opportunity to engage in hands-on laboratory work, collaborate on research projects, and contribute to scientific advancements. This exposure to research methodologies and techniques nurtures a spirit of inquiry and curiosity. Many groundbreaking discoveries and technological advancements have their roots in the research conducted by B.Sc. students and graduates. By fostering innovation, B.Sc. programs play a crucial role in driving progress and shaping the future. Building Practical Skills and Industry-Relevant Knowledge In addition to theoretical knowledge, B.Sc. programs prioritize the development of practical skills that are directly applicable in the workplace. Students gain proficiency in using scientific instruments, conducting experiments, analyzing data, and utilizing advanced software tools. This hands-on experience ensures that graduates are job-ready and can seamlessly transition into professional roles. Furthermore, many B.Sc. programs offer internships, industry collaborations, and real-world projects, providing students with valuable exposure to the demands and expectations of their chosen field. Encouraging Interdisciplinary Learning The interdisciplinary nature of B.Sc. programs allows students to explore various fields of science and develop a holistic understanding of complex phenomena. For instance, a student studying environmental science might also take courses in biology, chemistry, and geology to gain a comprehensive perspective on environmental issues. This interdisciplinary approach fosters a deeper appreciation for the interconnectedness of scientific disciplines and promotes a well-rounded education. Transforming Lives and Careers Expanding Career Opportunities A B.Sc. degree opens doors to a wide array of career opportunities across diverse sectors. Graduates can pursue careers in research and development, healthcare, information technology, environmental conservation, education, finance, and more. The versatility of a B.Sc. degree allows individuals to adapt to various roles and industries, providing them with the flexibility to explore different career paths. Moreover, the demand for STEM professionals continues to grow, ensuring that B.Sc. graduates are in high demand and have excellent job prospects. Contributing to Societal Progress B.Sc. graduates play a crucial role in addressing some of the world's most pressing challenges. From developing sustainable energy solutions and advancing medical research to improving cybersecurity and combating climate change, B.Sc. professionals are at the forefront of driving positive change. Their expertise and innovative thinking contribute to societal progress and enhance the quality of life for individuals and communities. By applying their knowledge and skills to solve real-world problems, B.Sc. graduates make a meaningful impact on society. Promoting Lifelong Learning and Personal Growth The journey of a B.Sc. program extends beyond academic achievements. It instills a passion for lifelong learning and personal growth. Graduates of B.Sc. programs are often driven by a desire to continue expanding their knowledge and staying updated with the latest advancements in their field. This commitment to continuous learning ensures that they remain competitive in the job market and can adapt to evolving industry trends. Moreover, the skills and mindset developed during a B.Sc. program, such as resilience, adaptability, and critical thinking, contribute to personal growth and success in various aspects of life. Inspiring Stories of Transformation From Student to Innovator: The Journey of Dr. Jane Smith Dr. Jane Smith's journey is a testament to the transformative power of a B.Sc. program. Starting as an inquisitive student with a passion for biology, Jane pursued a B.Sc. in Biology at a prestigious university. During her undergraduate studies, she actively participated in research projects, exploring the potential of stem cell therapy. Her groundbreaking research earned her recognition and scholarships, paving the way for her to pursue a Ph.D. in Biotechnology. Today, Dr. Smith is a renowned scientist and innovator, leading a team of researchers in developing cutting-edge medical treatments. Her contributions to regenerative medicine have the potential to revolutionize healthcare and improve the lives of millions. Empowering Communities: The Impact of Environmental Scientist John Doe John Doe's B.Sc. journey led him to become a dedicated environmental scientist committed to making a positive impact on the planet. After completing his B.Sc. in Environmental Science, John joined a non-profit organization focused on environmental conservation. Through his work, he implemented sustainable practices in local communities, conducted research on climate change mitigation, and raised awareness about environmental issues. John's efforts have empowered communities to adopt eco-friendly practices and contribute to a greener, more sustainable future. His story exemplifies how a B.Sc. program can inspire individuals to become change agents and make a difference in the world. Conclusion A [Bsc full form](https://universitychalo.com/course/bsc-bachelor-of-science-full-form) (Bachelor of science)program is more than just an academic pursuit; it is a transformative journey that empowers minds and shapes futures. Through the development of critical thinking, practical skills, and a passion for lifelong learning, B.Sc. graduates are equipped to tackle complex challenges and drive progress in various fields. Their contributions to research, innovation, and societal advancement underscore the profound impact of B.Sc. programs on individuals and communities. As we look to the future, it is evident that B.Sc. programs will continue to play a vital role in empowering minds and transforming lives, paving the way for a brighter and more prosperous world. For those aspiring to pursue a B.Sc. program in India, the [Universitychalo](https://universitychalo.com/) website is an invaluable resource. This website helps users search for courses, colleges, and universities across the country and provides assistance with admissions. Universitychalo streamlines the process of finding the right educational institution, ensuring that students can embark on their transformative educational journey with confidence and ease.

sheetalserco

Cutting-Edge Alloy Solutions by Danyang Kaixin Alloy Material Co., Ltd

Game Changing Innovation For Everybody! - Cutting-Edge Alloy Solutions Danyang Kaixin Alloy Material...

https://dev.to/kate_cacatianjzg_1c59282a/cutting-edge-alloy-solutions-by-danyang-kaixin-alloy-material-co-ltd-2m1d

design

Game Changing Innovation For Everybody! - Cutting-Edge Alloy Solutions Danyang Kaixin Alloy Material Co., Ltd is a well-established manufacturer for producing high-class stainless steel alloy materials that have completely transformed many sectors. From being applied in industrial / commercial settings to their indispensable role they have played or continue playing on safety standards. In this blog, we will discuss The benefits these modern alloy solutions offer to you then how they could be used effectively and Services of the top-notch quality that Danyang Kaixin Alloy Material Co.,Ltd delivers. Benefits of State-of-the-Art Alloy Answers First of all, the alloy solutions created by Danyang Kaixin Alloy Material Co., Ltd are revolutionary and futuristic. Alloy Buildings | lifespan: These metal buildings have very high strength and are known for their long life time which is why these offer you a cost advantage benefit ultimately leading to lot of savings in real sense. With so much research and unique processing, these two alloys are now looking very good for users to work in their maximize efficiency way. Moreover, the use of state-of-the-art manufacturing methods ensures that customers get quality Hastelloy Alloy products. Cutting-Edge Alloy Solutions Innovation Technological-driven industries are very dependent on the element of innovation, something that Danyang Kaixin Alloy Material Co., Ltd is almost flawless at doing. The company is always improving these state-of-the-art alloy solutions to provide customers with the most cost-effective tools that will get them up and running sooner. Designed to serve the demanding requirements of customers' applications that are constantly evolving, each of these alloys remain current with state-of-the-art technological advancements. Solution Danyang Kaixin Alloy Material Co., Ltd Is Secure Production environment and workplace safety are the top priority, Danyang Kaixin Alloy Material Co., Ltd attaches great importance to this. Its products undergo thorough testing with extreme conditions to verify that they will not impact the safety of anyone or anything. This commitment ensures that their advanced alloy solutions can be applied with the utmost confidence in applications requiring the strictest safety. Applying the Latest Alloy Solutions The products of Danyang Kaixin Alloy Material Co., Ltd are very well adapted and can be used in many areas. The opportunities for using these highly alloyed metals include everything from stronger engines and sturdier construction equipment to just a more rugged cellphone. These products simply require consultation with the expert team at Danyang Kaixin Alloy Material Co., Ltd for best use, and able to yield maximum R.O.I. Best-in-class Alloy Solutions & Service Quality In Danyang Kaixin Alloy Material Co., Ltd, quality control is the soul of enterprise. We hold ourselves to the highest standards of quality in delivering our Nickel Based Welding Wire products. Alloys are sold with a full warranty to meet any issues from manufacturing defects. They also have a very experienced customer service team that is willing and able to help, answer any queries or questions of yours so you get the maximum satisfaction from your purchase. Utilization of state-of-the-art alloy solutions Danyang Kaixin Alloy Material Co., Ltd's products find applications in a wide variety of areas ranging from construction and machinery components to common household items. Their malleability and functionality make them a versatile material, perfect for client-specific requirements (and demands). Their adaptability has been empowering customers to develop particular products that are tailored directly towards their distinct requirements. Conclusion In Summary, the Cutting-Edge Alloy Solutions from Danyang Kaixin Alloy Material Co., Ltd Impacts on Alloys Industry Landscap.viewModel.species. Founded in 2013, BAC has been dedicated to customer satisfaction beside health and quality assurance like few others it proves their force on how they lead by example Customers can rely on a Danyang Kaixin Alloy Material Co., Ltd team of seasoned leaders when it comes to not just customer service, but with an assurance that the High Temperature Alloy products are efficient and effective. The company ensures that its alloy offerings are not only durable and reliable but also designed, as needed by each customer. If you are looking for top-notch quality alloys that give a really good bang for your buck, then Danyang Kaixin Alloy Material Co., Ltd is the best resource.

kate_cacatianjzg_1c59282a

Leetcode Day 3: Roman to Integer Explained

The problem is as follows: Roman numerals are represented by seven different symbols: I, V, X, L, C,...

https://dev.to/simona-cancian/leetcode-day-3-roman-to-integer-explained-329o

python, leetcode, beginners, codenewbie

The problem is as follows: Roman numerals are represented by seven different symbols: `I`, `V`, `X`, `L`, `C`, `D` and `M`. Symbol: Value I: 1 V: 5 X: 10 L: 50 C: 100 D: 500 M: 1000 For example, `2` is written as `II` in Roman numeral, just two ones added together. `12` is written as `XII`, which is simply `X + II`. The number `27` is written as `XXVII`, which is `XX + V + II`. Roman numerals are usually written largest to smallest from left to right. However, the numeral for four is not `IIII`. Instead, the number four is written as `IV`. Because the one is before the five we subtract it making four. The same principle applies to the number nine, which is written as `IX`. There are six instances where subtraction is used: - `I` can be placed before `V` (5) and `X` (10) to make 4 and 9. - `X` can be placed before `L` (50) and `C` (100) to make 40 and 90. - `C` can be placed before `D` (500) and `M` (1000) to make 400 and 900. Given a roman numeral, convert it to an integer. Here is how I solved it: - Let's make use of a dictionary to map each roman numeral to its integer value. - Initialize a variable result to 0, which we will use to store the final integer value. ``` roman_numbers = {'I' : 1, 'V' : 5, 'X' : 10, 'L' : 50, 'C' : 100, 'D' : 500, 'M' : 1000} result = 0 ``` - Iterate through the string. - If current character is greater than previous character, subtract twice the value of "s[char - 1]" and add the value of "s[char]". Here is where we handle the subtraction cases. For example, `IV = 4` (`I=1` is less than `V=5`, so add `5` and subtract `1` twice: `5 - 2 + 1`. - Else, add the value of "s[char]" to the result. Here is where we handle the regular addition. - Return result, which is the integer value of the roman numeral. ``` for char in range(len(s)): if char > 0 and roman_numbers[s[char]] > roman_numbers[s[char - 1]]: result += roman_numbers[s[char]] - 2 * roman_numbers[s[char - 1]] else: result += roman_numbers[s[char]] return result ``` Here is the completed solution: ``` class Solution: def romanToInt(self, s: str) -> int: roman_numbers = {'I' : 1, 'V' : 5, 'X' : 10, 'L' : 50, 'C' : 100, 'D' : 500, 'M' : 1000} result = 0 for char in range(len(s)): if char > 0 and roman_numbers[s[char]] > roman_numbers[s[char - 1]]: result += roman_numbers[s[char]] - 2 * roman_numbers[s[char - 1]] else: result += roman_numbers[s[char]] return result ```

simona-cancian

Teen Patti Master India's Greatest Online Card Game -mod Apk

Teen Patti Master is an entertaining card game that gives prizes. Win instant cash &amp; bounce...

https://dev.to/teenpattimodapk/teen-patti-master-indias-greatest-online-card-game-mod-apk-ci2

teenpatti, teenpattimaster, cardgames, indiancardgames

 **[Teen Patti Master](https://teenpattimastermodapk.in/)** is an entertaining card game that gives prizes. Win instant cash & bounce RS.3000. Teen Patti Master is one of the best playing games in World.there are over 10 games that are also popular with this game. Essentially, it is a card game that covers three card games and various varieties of the game. This game features an unusual game play interface that makes it exciting and engaging to play and watch. By downloading and playing the game, you may win cash money, rewards, bonuses, and many more. Finally, the online platform allows you to earn money in an easy and fun way, with the possibility of winning unexpected and exciting money and rewards. If you want to be the greatest of all time, go and download the greatest game of all time, Teen Patti Master, show off your skills to the world, and become a part of the most awakened game of 2024. Play & Win: Download Today **[Teen Patti Master Mod APK](https://teenpattimastermodapk.in/)** Game Now !!!

teenpattimodapk

Exploring the Uncharted: Fun and Weird Stuff in Python

Python is widely celebrated for its simplicity and readability, making it a favourite among...

https://dev.to/subham_behera/exploring-the-uncharted-fun-and-weird-stuff-in-python-19hg

beginners, programming, learning, python

Python is widely celebrated for its simplicity and readability, making it a favourite among developers and data scientists. But beyond its practical applications, Python has a playful and quirky side that's worth exploring. In this post, I'll take you on a journey through some lesser-known and weird features of Python that can add a bit of fun and surprise to your coding experience. ## 1. The Zen of Python Before we dive into the weird stuff, let's start with a hidden gem that provides a philosophical foundation for Python: The Zen of Python. You can access it by importing this: ```python import this ``` This will print out a set of aphorisms written by Tim Peters, which serve as guiding principles for writing Python code. It's a great reminder of why Python is such a delightful language. ## 2. Python's Easter Eggs Python has several Easter eggs hidden within its standard library. One of the most famous is the "import antigravity" module, which opens a webcomic by XKCD: ```python import antigravity ``` Another fun Easter egg is the import __hello__: ```python import __hello__ ``` This will print "Hello world!" to the console. These Easter eggs are just for fun and don't serve any practical purpose, but they showcase the playful nature of the Python community. ## 3. The Walrus Operator Introduced in Python 3.8, the walrus operator (:=) allows you to assign values to variables as part of an expression. It can make your code more concise and readable in certain situations: ```python # Traditional way data = input("Enter something: ") while data != "quit": print(f"You entered: {data}") data = input("Enter something: ") # Using the walrus operator while (data := input("Enter something: ")) != "quit": print(f"You entered: {data}") ``` ## 4. The else Clause in Loops Did you know that loops in Python can have an else clause? The else clause executes only if the loop completes normally (i.e., it doesn't encounter a break statement): ```python for i in range(5): if i == 3: break print(i) else: print("Loop completed without break") for i in range(5): print(i) else: print("Loop completed without break") ``` ## 5. String Formatting Python offers several ways to format strings, from the older % operator to the format() method and the more recent f-strings (formatted string literals): ```python name = "Alice" age = 30 # Using % operator print("Hello, %s! You are %d years old." % (name, age)) # Using format() method print("Hello, {}! You are {} years old.".format(name, age)) # Using f-strings print(f"Hello, {name}! You are {age} years old.") ``` ## Conclusion Python is not just a tool for getting things done; it's also a playground for exploring new ideas and having fun. By delving into these weird and lesser-known features, you can not only enhance your Python skills but also discover the joy and creativity that Python can bring to your coding experience. Happy coding!

subham_behera

Why We Built a MongoDB-Message Queue and Reinvented the Wheel

Hey👋 I'm Mads Quist, founder of All Quiet . We've implemented a home-grown message queue based on...

https://dev.to/allquiet/why-we-built-a-mongodb-message-queue-and-reinvented-the-wheel-al3

mongodb, csharp, dotnet, eventdriven

Hey👋 I'm Mads Quist, founder of [All Quiet ](https://allquiet.app?utm_source=DEV_post). We've implemented a home-grown message queue based on MongoDB and I'm here to talk about: - Why we re-invented the wheel - How we re-invented the wheel # 1. Why we re-invented the wheel Why do we need message queuing? [All Quiet ](https://allquiet.app?utm_source=DEV_post) is a modern incident management platform, similar to [PagerDuty](https://www.pagerduty.com). Our platform requires features like: - Sending a double-opt-in email asynchronously after a user registers - Sending a reminder email 24 hours after registration - Sending push notifications with Firebase Cloud Messaging (FCM), which can fail due to network or load problems. As push notifications are crucial to our app, we need to retry sending them if there's an issue. - Accepting emails from outside our integration and processing them into incidents. This process can fail, so we wanted to decouple it and process each email payload on a queue.  ## Our tech stack To understand our specific requirements, it's important to get some insights into our tech stack: - We run a monolithic web application based on .NET Core 7. The .NET Core application runs in a Docker container. - We run multiple containers in parallel. - An HAProxy instance distributes HTTP requests equally to each container, ensuring a highly available setup. - We use MongoDB as our underlying database, replicated across availability zones. - All of the above components are hosted by AWS on generic EC2 VMs. ## Why we re-invented the wheel - We desired a simple queuing mechanism that could run in multiple processes simultaneously while guaranteeing that each message was processed only once. - We didn't need a pub/sub pattern. - We didn't aim for a complex distributed system based on CQRS / event sourcing because, you know, the first rule of distributed systems is to not distribute. - We wanted to keep things as simple as possible, following the philosophy of choosing "boring technology". Ultimately, it's about minimizing the number of moving parts in your infrastructure. We aim to build fantastic features for our excellent customers, and it's imperative to maintain our services reliably. Managing a single database system to achieve more than five nines of uptime is challenging enough. So why burden yourself with managing an additional HA RabbitMQ cluster? ## Why not just use AWS SQS? Yeah… cloud solutions like AWS SQS, Google Cloud Tasks, or Azure Queue Storage are fantastic! However, they would have resulted in vendor lock-in. We simply aspire to be independent and cost-effective while still providing a scalable service to our clients.  # 2. How we re-invented the wheel What is a message queue? A message queue is a system that stores messages. Producers of messages store these in the queue, which are later dequeued by consumers for processing. This is incredibly beneficial for decoupling components, especially when processing messages is a resource-intensive task. ## What characteristics should our queue show? - Utilizing MongoDB as our data storage - Guaranteeing that each message is consumed only once - Allowing multiple consumers to process messages simultaneously - Ensuring that if message processing fails, retries are possible - Enabling scheduling of message consumption for the future - Not needing guaranteed ordering - Ensuring high availability - Ensuring messages and their states are durable and can withstand restarts or extended downtimes MongoDB has significantly evolved over the years and can meet the criteria listed above. ## Implementation In the sections that follow, I'll guide you through the MongoDB-specific implementation of our message queue. While you'll need a client library suitable for your preferred programming language, such as NodeJS, Go, or C# in the case of All Quiet, the concepts I'll share are platform agnostic. ### Queues Each queue you want to utilize is represented as a dedicated collection in your MongoDB database. Message Model Here's an example of a processed message: ``` { "_id" : NumberLong(638269014234217933), "Statuses" : [ { "Status" : "Processed", "Timestamp" : ISODate("2023-08-06T06:50:23.753+0000"), "NextReevaluation" : null }, { "Status" : "Processing", "Timestamp" : ISODate("2023-08-06T06:50:23.572+0000"), "NextReevaluation" : null }, { "Status" : "Enqueued", "Timestamp" : ISODate("2023-08-06T06:50:23.421+0000"), "NextReevaluation" : null } ], "Payload" : { "YourData" : "abc123" } } ``` Let’s look at each property of the message. `_id` The `_id` field is the canonical unique identifier property of MongoDB. Here, it contains a `NumberLong`, not an `ObjectId` . We need `NumberLong` instead of `ObjectId` because: While `ObjectId` values should increase over time, they are not necessarily monotonic. This is because they: > Only contain one second of temporal resolution, so ObjectId values created within the same second do not have a guaranteed ordering, and are generated by clients, which may have differing system clocks. In our C# implementation, we generate an `Id` with millisecond precision and guaranteed ordering based on insertion time. Although we don't require strict processing order in a multi-consumer environment (similar to RabbitMQ), it's essential to maintain FIFO order when operating with just one consumer. Achieving this with `ObjectId` is not feasible. If this isn't crucial for you, you can still use `ObjectId`. ### Statuses The `Statuses` property consists of an array containing the message processing history. At index `0`, you'll find the current status, which is crucial for indexing. The status object itself contains three properties: - `Status`: Can be "Enqueued", "Processing", "Processed", or "Failed". - `Timestamp`: This captures the current timestamp. - `NextReevaluation`: Records when the next evaluation should occur, which is essential for both retries and future scheduled executions. ### Payload This property contains the specific payload of your message. ### Enqueuing a message Adding a message is a straightforward insert operation into the collection with the status set to `"Enqueued"`. - For immediate processing, set `NextReevaluation` to null. - For future processing, set `NextReevaluation` to a timestamp in the future, when you want your message to be processed. ``` db.yourQueueCollection.insert({ "_id" : NumberLong(638269014234217933), "Statuses" : [ { "Status" : "Enqueued", "Timestamp" : ISODate("2023-08-06T06:50:23.421+0000"), "NextReevaluation" : null } ], "Payload" : { "YourData" : "abc123" } }); ``` ### Dequeuing a message Dequeuing is slightly more complex but still relatively straightforward. It heavily relies on the concurrent atomic read and update capabilities of MongoDB. This essential feature of MongoDB ensures: - Each message is processed only once. - Multiple consumers can safely process messages simultaneously. ``` db.yourQueueCollection.findAndModify({ "query": { "$and": [ { "Statuses.0.Status": "Enqueued" }, { "Statuses.0.NextReevaluation": null } ] }, "update": { "$push": { "Statuses": { "$each": [ { "Status": "Processing", "Timestamp": ISODate("2023-08-06T06:50:23.800+0000"), "NextReevaluation": null } ], "$position": 0 } } } }); ``` So we are reading one message that is in state `“Enqueued”` and at the same time modify it by setting the status `“Processing”` at position `0`. Since this operation is atomic it will guarantee that the message will not be picked up by another consumer. ### Marking a message as processed Once the processing of the message is complete, it's a simple matter of updating the message status to `"Processed"` using the message’s `id`. ``` db.yourQueueCollection.findAndModify({ "query": { "_id": NumberLong(638269014234217933) }, "update": { "$push": { "Statuses": { "$each": [ { "Status": "Processed", "Timestamp": ISODate("2023-08-06T06:50:24.100+0000"), "NextReevaluation": null } ], "$position": 0 } } } }); ``` ### Marking a message as failed If processing fails, we need to mark the message accordingly. Often, you might want to retry processing the message. This can be achieved by re-enqueuing the message. In many scenarios, it makes sense to reprocess the message after a specific delay, such as 10 seconds, depending on the nature of the processing failure. ``` db.yourQueueCollection.findAndModify({ "query": { "_id": NumberLong(638269014234217933) }, "update": { "$push": { "Statuses": { "$each": [ { "Status": "Failed", "Timestamp": ISODate("2023-08-06T06:50:24.100+0000"), "NextReevaluation": ISODate("2023-08-06T07:00:24.100+0000") } ], "$position": 0 } } } }); ``` ### The dequeuing loop We've established how we can easily enqueue and dequeue items from our "queue," which is, in fact, simply a MongoDB collection. We can even "schedule" messages for the future by leveraging the `NextReevaluation` field. What's missing is how we will dequeue regularly. Consumers need to execute the `findAndModify` command in some kind of loop. A straightforward approach would be to create an endless loop in which we dequeue and process a message. This method is straightforward and effective. However, it will exert considerable pressure on the database and the network. An alternative would be to introduce a delay, e.g., 100ms, between loop iterations. This will significantly reduce the load but will also decrease the speed of dequeuing. The solution to the problem is what MongoDB refers to as a [change stream](https://www.mongodb.com/docs/manual/changeStreams/). ### MongoDB Change Streams What are [change streams](https://www.mongodb.com/docs/manual/changeStreams/)? I can’t explain it better than the guys at MongoDB: > Change streams allow applications to access real-time data changes […]. Applications can use change streams to subscribe to all data changes on a single collection […] and immediately react to them. Great! What we can do is listen to newly created documents in our queue collection, which effectively means listening to newly enqueued messages This is dead simple: ``` const changeStream = db.yourQueueCollection.watch(); changeStream.on('insert', changeEvent => { // Dequeue the message db.yourQueueCollection.findAndModify({ "query": changeEvent.documentKey._id, "update": { "$push": { "Statuses": { "$each": [ { "Status": "Processing", "Timestamp": ISODate("2023-08-06T06:50:24.100+0000"), "NextReevaluation": null } ], "$position": 0 } } } }); ``` ### Scheduled and Orphaned Messages The change stream approach, however, does not work for both scheduled and orphaned messages because there is obviously no change that we can listen to. - Scheduled messages simply sit in the collection with the status `"Enqueued"` and a `"NextReevaluation"` field set to the future. - Orphaned messages are those that were in the `"Processing"` status when their consumer process died. They remain in the collection with the status `"Processing"` but no consumer will ever change their status to `"Processed"` or `"Failed"`. For these use cases, we need to revert to our simple loop. However, we can use a rather generous delay between iterations. # Wrapping it up "Traditional" databases, like MySQL, PostgreSQL, or MongoDB (which I also view as traditional), are incredibly powerful today. If used correctly (ensure your indexes are optimized!), they are swift, scale impressively, and are cost-effective on traditional hosting platforms. Many use cases can be addressed using just a database and your preferred programming language. It's not always necessary to have the "right tool for the right job," meaning maintaining a diverse set of tools like Redis, Elasticsearch, RabbitMQ, etc. Often, the maintenance overhead isn't worth it. While the solution proposed might not match the performance of, for instance, RabbitMQ, it's usually sufficient and can scale to a point that would mark significant success for your startup. Software engineering is about navigating trade-offs. Choose yours wisely.

mads_quist

Multi-Tenant vs. Single-Tenant Applications

Understanding Multi-Tenant vs. Single-Tenant Applications Introduction In the...

https://dev.to/sh20raj/multi-tenant-vs-single-tenant-applications-3gc4

multitenant, sigletenant

## Understanding Multi-Tenant vs. Single-Tenant Applications ### Introduction In the world of software architecture, particularly for SaaS (Software as a Service) applications, two primary models are widely used: multi-tenant and single-tenant architectures. Each model has its advantages and challenges, and the choice between them depends on various factors such as scalability, cost, security, and customization needs. ### What is a Multi-Tenant Application? A multi-tenant application is designed to serve multiple customers (tenants) using a single instance of the software. In this architecture, resources such as databases, servers, and applications are shared among all tenants. Each tenant's data is isolated and invisible to others, but they share the same underlying infrastructure. #### Advantages of Multi-Tenant Architecture 1. **Cost Efficiency**: Since resources are shared, the cost per user is lower. Maintenance and operational costs are distributed across multiple tenants【24†source】【25†source】. 2. **Scalability**: Multi-tenant systems can scale efficiently by optimizing resource usage across tenants. Adding new tenants is straightforward and doesn't require new infrastructure for each one【25†source】【26†source】. 3. **Simplified Maintenance**: Updates and maintenance are easier to manage as changes are applied to a single instance affecting all tenants simultaneously【24†source】【26†source】. #### Disadvantages of Multi-Tenant Architecture 1. **Security Risks**: Shared resources can lead to increased security risks. A breach affecting one tenant could potentially compromise others【25†source】. 2. **Performance Issues**: The "noisy neighbor" problem, where the performance demands of one tenant impact others, can be a concern【25†source】. 3. **Limited Customization**: Customization options are usually limited compared to single-tenant systems as changes impact all tenants【26†source】. ### What is a Single-Tenant Application? In a single-tenant architecture, each tenant has their own instance of the software, including separate databases and servers. This isolation provides a higher degree of customization and security, tailored to the specific needs of each tenant. #### Advantages of Single-Tenant Architecture 1. **Enhanced Security**: Each tenant's data is completely isolated, reducing the risk of data breaches and ensuring privacy【24†source】【25†source】. 2. **Customization**: Tenants can customize their instance extensively, adapting the software to their unique requirements【26†source】. 3. **Performance**: With dedicated resources, single-tenant applications can offer better performance without the risk of interference from other tenants【25†source】. #### Disadvantages of Single-Tenant Architecture 1. **Higher Costs**: Maintaining separate instances for each tenant is resource-intensive and more expensive. The costs of infrastructure and maintenance are higher compared to multi-tenant systems【24†source】【25†source】. 2. **Complex Scalability**: Scaling single-tenant applications is more challenging as it requires provisioning new instances for each tenant, which can be time-consuming and costly【26†source】. 3. **Maintenance Overhead**: Each instance requires individual updates and maintenance, leading to increased operational overhead【25†source】. ### Key Differences Here are some key differences between multi-tenant and single-tenant architectures: | Feature | Multi-Tenant App | Single-Tenant App | |----------------------------|-----------------------------------------|------------------------------------------| | **Isolation** | Shared resources, data isolation | Separate infrastructure for each tenant | | **Security** | Increased risk due to shared resources | Higher security due to isolation | | **Scalability** | Efficient and quick | Complex and resource-intensive | | **Customization** | Limited | Extensive | | **Cost** | Lower per user | Higher | | **Maintenance** | Easier, centralized | Complex, individualized | | **Performance** | Potential noisy neighbor issues | Optimized for each tenant | ### Conclusion Choosing between a multi-tenant and single-tenant architecture depends on your specific needs and goals. Multi-tenant architectures are ideal for cost-efficiency, scalability, and ease of maintenance, making them suitable for SaaS providers with many users. Single-tenant architectures offer enhanced security, customization, and performance, making them better suited for organizations with specific, high-security requirements. ### Visual Representation #### Multi-Tenant Architecture  #### Single-Tenant Architecture  [Image Credit](https://medium.com/@sudheer.sandu/multi-tenant-application-68c11cc68929) ### References 1. [OneLogin](https://www.onelogin.com/learn/multi-tenancy-vs-single-tenancy) 2. [Frontegg](https://www.frontegg.com/blog/multi-tenant-vs-single-tenant) 3. [Clockwise Software](https://clockwise.software/blog/multi-tenant-architecture/) These sources provide comprehensive insights into the benefits, drawbacks, and use cases of multi-tenant and single-tenant architectures, helping you make an informed decision based on your application requirements.

sh20raj

dewatering

Business Directory online Dewatering.ae - in our catalog you will explore popular dewatering...

https://dev.to/dewatering2/dewatering-55n0

Business Directory online Dewatering.ae - in our catalog you will explore popular [dewatering companies in Dubai](https://dewatering.ae/). Choose the company for dewatering with the best rating and reviews. Leader in the area of equipment for dewatering in UAE. High rating and recognition for your brand.

dewatering2

Can you become a Software Developer?

Can you become a Software Developer? To answer this question, let me bust some myths you might have...

https://www.jobreadyprogrammer.com/p/blog/can-you-become-a-software-developer

programming, career, softwaredevelopment, coding

<p class="MsoNormal" style="line-height: normal;"><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; color: black;">Can you become a Software Developer?</span><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman';"><o:p></o:p></span></p> <p class="MsoNormal" style="line-height: normal;"><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; color: black;">To answer this question, let me bust some myths you might have about a career in Software Development.<o:p></o:p></span></p> <p class="MsoNormal" style="line-height: normal;"><b style="mso-bidi-font-weight: normal;"><span lang="EN-US" style="font-size: 14.0pt; mso-bidi-font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman';">Need for a college degree<o:p></o:p></span></b></p> <p class="MsoNormal" style="line-height: normal;"><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; color: black;">To begin with, do you need a college degree? Absolutely. It doesn't have to be in computer science or information technology. It could also be anything else like a bachelor's degree in accounting, finance, journalism, history, etc. It doesn't matter. Software developers still need an undergraduate degree to break into the field.&nbsp;<o:p></o:p></span></p> <p class="MsoNormal" style="line-height: normal;"><b style="mso-bidi-font-weight: normal;"><span lang="EN-US" style="font-size: 14.0pt; mso-bidi-font-size: 11.0pt; font-family: 'Times New Roman',serif;">Personal experience related to degree and job</span></b><b style="mso-bidi-font-weight: normal;"><span lang="EN-US" style="font-size: 14.0pt; mso-bidi-font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman';"><o:p></o:p></span></b></p> <p class="MsoNormal" style="line-height: normal;"><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; color: black;">Now, why should you believe me? Well, I'm a living example who does not have a computer science degree. I graduated with an accounting degree many years ago. But through coding on the side and learning this stuff myself. One year after graduating college I was able to get my foot in the door in a software development type role, it was a data role. I learned SQL first. I got a SQL developer job, learned databases, and got good at that. Then learned about the tech space, how the software development life cycle works, how project management works, learned the company culture, and the technical jargon.&nbsp;</span><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman';"><o:p></o:p></span></p> <p class="MsoNormal" style="line-height: normal;"><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; color: black;">And then I started learning about software development, and different programming languages like Python, Java, JavaScript, and Ruby. I learned all of the necessary skills and then I started applying for full-stack software development jobs. Later, I got my foot on that and then the rest is all history. I worked for various large companies, small companies, and tech startups, you name it. I&rsquo;ve been there and done it. It's possible for anyone and you are hearing it from the right person.<o:p></o:p></span></p> <p class="MsoNormal" style="line-height: normal;"><b style="mso-bidi-font-weight: normal;"><span lang="EN-US" style="font-size: 14.0pt; mso-bidi-font-size: 11.0pt; font-family: 'Times New Roman',serif;">Myths about the no-degree requirement</span></b><b style="mso-bidi-font-weight: normal;"><span lang="EN-US" style="font-size: 14.0pt; mso-bidi-font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman';"><o:p></o:p></span></b></p> <p class="MsoNormal" style="line-height: normal;"><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; color: black;">Now there is news about the tech giants that are getting rid of the requirement for a four-year degree but that's really for people who can get those jobs without a four-year degree are prodigies, to begin with. They've probably been coding since they were four. And have already had quite a bit under their belt and have a very good portfolio to show off. And typically they're already in the spotlight from these companies and they get recruited and they end up just not going to college because they got hired by this company. And then maybe later they do continue their education. That's so rare and you shouldn't be comparing yourself with other people, anyway. There's still plenty of time for you to learn something rapidly and be good at it.<o:p></o:p></span></p> <p class="MsoNormal" style="line-height: normal;"><b style="mso-bidi-font-weight: normal;"><span lang="EN-US" style="font-size: 14.0pt; mso-bidi-font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman';">Various types of tech roles<o:p></o:p></span></b></p> <p class="MsoNormal" style="line-height: normal;"><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; color: black;">So, if you have some level of a college degree, there is room for you in Tech. There are so many fields within Tech that you can get into. Let&rsquo;s say you enjoy coding then you're probably going to be a coder. But if you're a more social person, then you might want to go be a project manager or project coordinator, business analyst, or technical support or sales type role. <o:p></o:p></span></p> <p class="MsoNormal" style="line-height: normal;"><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; color: black;">Or if you have a math degree you can get into a statistics role in a machine learning environment or you know in a data science company. There's Blockchain, Cloud computing, and so on and on.<o:p></o:p></span></p> <p class="MsoNormal" style="line-height: normal;"><b style="mso-bidi-font-weight: normal;"><span lang="EN-US" style="font-size: 14.0pt; mso-bidi-font-size: 11.0pt; font-family: 'Times New Roman',serif;">Opportunities in the tech industry</span></b><b style="mso-bidi-font-weight: normal;"><span lang="EN-US" style="font-size: 14.0pt; mso-bidi-font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman';"><o:p></o:p></span></b></p> <p class="MsoNormal" style="line-height: normal;"><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; color: black;">So, I want everyone to go into Tech because that&rsquo;s where the world is headed, and that&rsquo;s the reality of job opportunities. If you do a quick search for &ldquo;Database developer&rdquo; or &ldquo;Software Developer&rdquo; on any job website like indeed.com or LinkedIn Jobs Portal. You will see that there are so many jobs out there, no matter where you are in the world, you are going to find jobs in the tech industry. Because Tech is it. Everything is headed in the world.&nbsp;</span><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman';"><o:p></o:p></span></p> <p class="MsoNormal" style="line-height: normal;"><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; color: black;">I don&rsquo;t want anyone to be unemployed or not have the means of making a living. There are many opportunities for you here at Tech and I&rsquo;m going to help you get there.</span><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman';"><o:p></o:p></span></p> <p class="MsoNormal" style="line-height: normal;"><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; color: black;">So, you know, it's really up to you and how hard you're willing to work.</span><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman';"><o:p></o:p></span></p> <p class="MsoNormal" style="line-height: normal;"><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; color: black;">Now, check out the upcoming blogs where I will be sharing the best way to get into Tech and I will provide you with insights on the right software development skills to learn.</span><span lang="EN-US" style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman';"><o:p></o:p></span></p> <h3><strong>YouTube Video</strong><strong></strong></h3> {% embed https://www.youtube.com/watch?v=5_HbArseoek %} <h3>Resources<span lang="EN-US" style="font-size: 12.0pt; mso-bidi-font-size: 11.0pt; line-height: 107%; font-family: 'Times New Roman',serif;"></span></h3> <ul style="font-size: 14px; font-weight: 400;"> <li>Join&nbsp;<a href="https://www.jobreadyprogrammer.com/p/all-access-pass?coupon_code=GET_HIRED_ALREADY">Job Ready Programmer Courses</a>&nbsp;and gain mastery in Data Analytics &amp; Software Development.</li> <li>Access our&nbsp;<a href="https://pages.jobreadyprogrammer.com/curriculum">free Programming Guide (PDF)</a>&nbsp;to explore our comprehensive Job Ready Curriculum today!</li> </ul> <p> <script src="https://exciting-painter-102.ck.page/b013e6a27f/index.js" async="" data-uid="b013e6a27f"></script> </p> #### About the Author Imtiaz Ahmad is an award-winning Udemy Instructor who is highly experienced in big data technologies and enterprise software architectures. Imtiaz has spent a considerable amount of time building financial software on Wall St. and worked with companies like S&P, Goldman Sachs, AOL and JP Morgan along with helping various startups solve mission-critical software problems. In his 13+ years of experience, Imtiaz has also taught software development in programming languages like Java, C++, Python, PL/SQL, Ruby and JavaScript. He's the founder of Job Ready Programmer - an online programming school that prepares students of all backgrounds to become professional job-ready software developers through real-world programming courses.

jobreadyprogrammer

Uncover the Secrets of Git with "Pro Git" 🔍

Comprehensive guide to the Git version control system, covering all aspects from basic commands to advanced workflows. Essential resource for collaborative software development.

https://getvm.io/tutorials/pro-git

getvm, programming, freetutorial, technicaltutorials

As a passionate software developer, I recently stumbled upon an absolute gem of a resource – the "Pro Git" book. This comprehensive guide, written by the co-authors of the official Git documentation, has become an indispensable tool in my journey to master the intricacies of version control. ## Dive into the World of Git 🌊 "Pro Git" is a treasure trove of knowledge, covering every aspect of the Git version control system. From the basic commands to the most advanced workflows, this book has it all. Whether you're a beginner just starting to explore the world of Git or an experienced developer looking to refine your skills, this resource is an absolute must-have. ## Collaborative Coding Made Easy 🤝 One of the standout features of "Pro Git" is its focus on collaborative software development. As someone who thrives in a team environment, I found the insights on Git workflows and best practices for collaborative coding to be invaluable. The book not only teaches you the technical aspects of Git but also provides practical guidance on how to effectively work with your team members. ## Always Up-to-Date and Accessible 📚 What I love most about "Pro Git" is its commitment to staying current and accessible. The book is regularly updated with corrections and additions from contributors, ensuring that you're always working with the most accurate and up-to-date information. And the best part? It's available as a free ebook in multiple formats, making it easily accessible no matter your device or preference. ## Unlock Your Full Potential 🔑 If you're serious about your software development career, I highly recommend diving into "Pro Git" [https://git-scm.com/book/en/](https://git-scm.com/book/en/). This comprehensive guide will not only teach you the ins and outs of Git but also empower you to become a more efficient and collaborative developer. Unlock your full potential and take your coding skills to new heights with "Pro Git" – your essential companion on the path to version control mastery. ## Elevate Your Learning Experience with GetVM Playground 🚀 Unlock the full potential of "Pro Git" by leveraging the powerful GetVM Playground. This Google Chrome browser extension seamlessly integrates an online coding environment, allowing you to dive deep into the concepts and practices covered in the book. With GetVM, you can instantly access a virtual machine and start coding alongside your reading, transforming passive learning into an interactive and immersive experience. The GetVM Playground [https://getvm.io/tutorials/pro-git] offers a distraction-free, cloud-based coding environment, empowering you to experiment, test, and apply the Git techniques you've learned. No more switching between multiple windows or setting up local development environments – the Playground brings everything you need right to your fingertips. Whether you're a beginner exploring Git for the first time or an experienced developer looking to refine your skills, the GetVM Playground provides a safe and collaborative space to put your knowledge into practice. Experience the power of hands-on learning with GetVM Playground. Elevate your understanding of Git, solidify your skills, and become a more confident and capable software developer. Unlock the full potential of "Pro Git" and take your coding journey to new heights with the seamless integration of GetVM. --- ## Practice Now! - 🔗 Visit [Pro Git | Version Control, Software Development, Collaborative Coding](https://git-scm.com/book/en/) original website - 🚀 Practice [Pro Git | Version Control, Software Development, Collaborative Coding](https://getvm.io/tutorials/pro-git) 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

Why Mastering API Development is Crucial for Every Developer

In the digital age, APIs (Application Programming Interfaces) are the unsung heroes driving the...

https://dev.to/vuyokazimkane/why-mastering-api-development-is-crucial-for-every-developer-2d7b

api, webdev, twilio

In the digital age, APIs (Application Programming Interfaces) are the unsung heroes driving the connectivity and functionality of modern software. As a developer, mastering API creation can significantly elevate your skills and open new doors. Here's why every developer should dive deep into API creation: #### 1. **Connecting Systems Seamlessly**  APIs are the vital connectors between disparate software systems. They allow applications to communicate and share data effortlessly, turning complex integrations into manageable tasks. Understanding how to create and leverage APIs means you can design systems that work together harmoniously, maximizing efficiency and functionality. #### 2. **Accelerating Innovation**  APIs are the catalysts for rapid innovation. By exposing your application’s functionalities through well-designed APIs, you enable other developers to build on top of your work. This collaborative approach accelerates the development of new features and applications, fostering a vibrant ecosystem of innovation. #### 3. **Achieving Scalability and Modularity**  APIs provide the framework for creating scalable and modular applications. By breaking down functionalities into discrete, reusable APIs, you can update, replace, or scale components independently. This modularity not only simplifies development but also enhances the flexibility and resilience of your systems. #### 4. **Elevating User Experience**  APIs are key to delivering exceptional user experiences. They enable seamless integrations across different platforms and devices, allowing your applications to provide consistent and intuitive interactions. Think about how effortless it is to log into various services using social media accounts – that’s the power of APIs in action. #### 5. **Unlocking Business Potential**  Mastering API creation can unlock new business opportunities and revenue streams. Companies like Stripe and Twilio have revolutionized their industries by offering APIs that simplify complex services like payments and communications. By creating robust APIs, you can develop products and services that drive business growth and innovation. #### 6. **Promoting Best Practices and Standards**  Creating APIs encourages adherence to industry standards and best practices. Well-designed APIs are intuitive, consistent, and secure, setting the stage for reliable and efficient development. This focus on standards not only improves your code quality but also facilitates better collaboration with other developers. #### 7. **Empowering Cross-Functional Collaboration**  Even beyond the development team, understanding APIs can enhance collaboration across different roles. Product managers, marketers, and sales teams can better understand technical capabilities, leading to more effective teamwork and more informed decision-making. This holistic understanding strengthens your entire organization. #### Conclusion APIs are the backbone of modern software development, driving connectivity, innovation, and user satisfaction. As a developer, mastering API creation is not just a valuable skill but a critical component of your professional toolkit. Embrace the power of APIs and transform your approach to software development – the possibilities are endless.

vuyokazimkane

My first Saas - flippcard.com

Are you tired of making decisions? Do you want to try a new and exciting way to make choices? Then...

https://dev.to/pohip_saas/my-first-saas-flippcardcom-22f

 Are you tired of making decisions? Do you want to try a new and exciting way to make choices? Then look no further than Flippcard.com - Flip the cards , Find the Suprise! Flippcard.com is a free website that helps you hide your options and make decisions randomly. Here's how it works: 1. Enter your choices: Start by entering all the options you want to consider. You can enter up to 20 options. 2. Create cards: Each option will be turned into a face-down card and the positions of the cards will be shuffled randomly. 3. Choose: Flip the cards one by one and eliminate the options you don't like. The last remaining card will be your final decision. ## Highlights of Flippcard.com: - Hides options: The website helps you not to be influenced by the order or information about other options, thus making decisions more objectively. - Randomization: The shuffling of the cards helps eliminate any bias and brings an element of surprise to your experience. - Privacy: Flippcard.com does not store any information about users or their choices. The website is completely free and does not require registration or login. - Easy to use: The website interface is simple and easy to use, suitable for everyone.  Flippcard.com can be used for a variety of purposes, including: Making personal decisions: Choosing clothes, food, travel destinations,... Solving group problems: Choosing projects, assigning tasks,... Playing games: Choosing a winner, drawing lots,... Try Flippcard.com today to bring a new and exciting twist to your decision-making! ## Visit Flippcard.com at: https://flippcard.com/ Share Flippcard.com with your friends and family so they can experience this unique website too! Thanks a lot ^^

pohip_saas

Automating User Management on Ubuntu with Bash Scripting

In modern IT operations, efficient user management on Linux systems is pivotal for maintaining...

https://dev.to/ekemini_thompson/automating-user-management-on-ubuntu-with-bash-scripting-59pc

devops, ubuntu, bash, linux

In modern IT operations, efficient user management on Linux systems is pivotal for maintaining security and operational flow. Automating tasks such as user creation, group management, and password handling not only saves time but also enhances consistency and reduces errors. This article delves into how to achieve these automation goals using a Bash script (create_users.sh) specifically tailored for Ubuntu environments. **Script Overview** The create_users.sh script simplifies the complex task of managing user accounts through automation. It reads from an input file (user_list.txt), where each line specifies a username followed by associated groups. Upon execution, the script creates users, assigns them to specified groups, sets up their home directories with proper permissions, generates secure passwords, and logs all activities for accountability. **Key Implementation Steps** Input Parsing: The script efficiently parses input to extract usernames and their respective groups, disregarding unnecessary whitespace for cleaner processing. User and Group Management: For each user entry: Checks for existing users and creates new ones as needed. Ensures groups are created if they do not already exist, then assigns users accordingly using administrative commands (useradd, groupadd, usermod). Home Directory Setup: Post user creation, the script configures home directories under /home/username, ensuring appropriate permissions (chmod) and ownership (chown) are set for security and accessibility. Password Security: Passwords are randomly generated using cryptographic standards (/dev/urandom) and securely stored in /var/secure/user_passwords.csv. This file restricts access to only authorized users, maintaining confidentiality. Logging: All script actions, from user creation to password generation, are logged meticulously in /var/log/user_management.log. This log serves as a comprehensive audit trail, aiding troubleshooting and compliance efforts. **Deployment Guide** To deploy the create_users.sh script: Clone the repository and navigate to the script directory. Prepare the user_list.txt file with usernames and their respective groups. Execute the script with root privileges (sudo bash create_users.sh user_list.txt). Review logs in /var/log/user_management.log and access passwords securely stored in /var/secure/user_passwords.csv as needed. **Detailed Script Overview** The `create_users.sh` script simplifies the complex task of managing user accounts through automation. It reads from an input file (`user_list.txt`), where each line specifies a username followed by associated groups. Upon execution, the script creates users, assigns them to specified groups, sets up their home directories with proper permissions, generates secure passwords, and logs all activities for accountability. **Key Implementation Steps** 1. **Input Parsing**: The script efficiently parses input to extract usernames and their respective groups, disregarding unnecessary whitespace for cleaner processing. ```bash #!/bin/bash LOGFILE="/var/log/user_management.log" PASSWORD_FILE="/var/secure/user_passwords.csv" if [ "$EUID" -ne 0 ]; then echo "Please run as root" exit 1 fi if [ ! -f "$1" ]; then echo "Input file not found!" exit 1 fi mkdir -p /var/secure touch "$PASSWORD_FILE" chmod 600 "$PASSWORD_FILE" while IFS=';' read -r username groups; do username=$(echo "$username" | xargs) groups=$(echo "$groups" | xargs) ``` 2. **User and Group Management**: For each user entry: - Checks for existing users and creates new ones as needed. - Ensures groups are created if they do not already exist, then assigns users accordingly using administrative commands (`useradd`, `groupadd`, `usermod`). ```bash if id "$username" &>/dev/null; then echo "User $username already exists." | tee -a "$LOGFILE" else useradd -m "$username" echo "User $username created successfully." | tee -a "$LOGFILE" fi user_group="$username" if ! getent group "$user_group" &>/dev/null; then groupadd "$user_group" echo "Group $user_group created successfully." | tee -a "$LOGFILE" fi usermod -aG "$user_group" "$username" IFS=',' read -ra ADDR <<< "$groups" for group in "${ADDR[@]}"; do group=$(echo "$group" | xargs) if ! getent group "$group" &>/dev/null; then groupadd "$group" echo "Group $group created successfully." | tee -a "$LOGFILE" fi usermod -aG "$group" "$username" echo "Added $username to group $group." | tee -a "$LOGFILE" done ``` 3. **Home Directory Setup**: Post user creation, the script configures home directories under `/home/username`, ensuring appropriate permissions (`chmod`) and ownership (`chown`) are set for security and accessibility. ```bash home_dir="/home/$username" if [ -d "$home_dir" ]; then chown "$username:$user_group" "$home_dir" chmod 755 "$home_dir" echo "Home directory $home_dir set up for $username." | tee -a "$LOGFILE" fi ``` 4. **Password Security**: Passwords are randomly generated using cryptographic standards (`/dev/urandom`) and securely stored in `/var/secure/user_passwords.csv`. This file restricts access to only authorized users, maintaining confidentiality. ```bash password=$(tr -dc A-Za-z0-9 </dev/urandom | head -c 12) echo "$username:$password" | chpasswd echo "$username,$password" >> "$PASSWORD_FILE" echo "Password set for $username." | tee -a "$LOGFILE" ``` 5. **Logging**: All script actions, from user creation to password generation, are logged meticulously in `/var/log/user_management.log`. This log serves as a comprehensive audit trail, aiding troubleshooting and compliance efforts. ```bash done < "$1" echo "User creation process completed." | tee -a "$LOGFILE" ``` ### Deployment Guide #### Prerequisites - Ubuntu environment with Bash shell. - Root or sudo privileges to execute administrative commands (`useradd`, `groupadd`, `chmod`, `chown`). #### Steps to Deploy 1. **Clone the Repository:** ```bash git clone https://github.com/EkeminiThompson/user_automation cd create_users ``` 2. **Prepare Input File (`user_list.txt`):** Create a text file with usernames and their respective groups in the format specified. 3. **Run the Script:** Execute the script with root privileges: ```bash sudo bash create_users.sh user_list.txt ``` 4. **Review Logs and Passwords:** - View detailed logs in `/var/log/user_management.log` to verify script execution. - Access generated passwords securely stored in `/var/secure/user_passwords.csv` as needed. **Conclusion** By automating user management tasks with create_users.sh, organizations can streamline operations, enhance security, and ensure consistency across Linux environments. This script exemplifies best practices in IT administration, empowering sysadmins to focus on strategic initiatives while maintaining robust user access controls. **Resources** [GitHub Repository:](https://github.com/EkeminiThompson/user_automation.git) Access the script and related files. [HNG Internship:](https://hng.tech/internship) Learn more about opportunities in tech and automation. [HNG Premium:](https://hng.tech/premium) Additional resources for professional growth and development. About the Author Ekemini Thompson is a seasoned Linux system administrator passionate about leveraging automation to optimize IT operations.

ekemini_thompson

What Technologies Help Prevent Cyber Attacks? 🛡️💻

The professional world today faces growing cybersecurity threats, making data protection an...

https://dev.to/namik_ahmedov/what-technologies-help-prevent-cyber-attacks-1e8c

cybersecurity, security

The professional world today faces growing cybersecurity threats, making data protection an increasingly critical issue. What technologies play a key role in preventing cyber attacks? Let's explore. 1. Firewalls: These systems filter network traffic and block potentially malicious packets, providing the first line of defense. 2. Antivirus Programs and Anti-Malware Solutions: Reliable protection against viruses, trojans, and other malicious software helps prevent attacks at the device level. 3. Intrusion Detection Systems (IDS): Monitoring network activity allows for the detection of unusual and suspicious access attempts, crucial for swift response. 4. Intrusion Prevention Systems (IPS): Automatically block or drop potentially dangerous data packets, minimizing threats before they reach targeted systems. 5. Data Encryption: Protects information by encoding it, making it inaccessible to unauthorized access. 6. Multi-Factor Authentication (MFA): Additional security layer requiring multiple forms of identification to access systems. 7. Regular Software Updates and Patches: Keeping software up to date with the latest security updates is crucial. 8. User Education: Awareness and training among employees on cybersecurity practices play a critical role in preventing phishing and social engineering. Effective protection against cyber threats requires a comprehensive approach and continuous attention to innovations in cybersecurity. Which of these technologies are you already using in your company or planning to implement? Share your experiences in the comments! 💬✨

namik_ahmedov

Innovations in Lisp: the Language that Shaped Programming

Lisp, short for "LISt Processing," is one of the oldest and most innovative programming languages,...

https://dev.to/francescoagati/innovations-in-lisp-the-language-that-shaped-programming-3ba4

Lisp, short for "LISt Processing," is one of the oldest and most innovative programming languages, created by John McCarthy in the 1950s. With a rich and influential history, Lisp has introduced numerous innovations that have revolutionized how programmers think and write code. This article explores the key innovations of Lisp, illustrating how they have shaped the development of programming languages and modern technology. #### 1. List-Based Structure One of Lisp's most distinctive features is its list-based structure. In Lisp, both code and data share the same representation: lists. This homogeneous approach has led to many innovations: - **Metaprogramming:** Thanks to the uniform representation of code and data, Lisp facilitates metaprogramming, allowing programs to manipulate and generate other programs. - **Simplicity and Flexibility:** The list-based structure makes Lisp extremely flexible and simple to analyze and transform, easing the writing of interpreters and compilers. #### 2. Powerful Macro System Lisp macros are among the most powerful and innovative features of the language. Unlike other macros in programming languages, Lisp macros operate at the source code level, allowing complex transformations before the compilation phase: - **Macro Expansion:** Macros can expand code during compilation, creating data structures or precomputed code, improving efficiency and modularity. - **DSLs (Domain-Specific Languages):** Lisp macros enable the creation of domain-specific languages, increasing productivity and code readability. #### 3. REPL (Read-Eval-Print Loop) The Lisp REPL is an interactive interface that allows developers to type expressions, evaluate them immediately, and see the results. This innovation has had a significant impact on software development: - **Immediate Feedback:** The REPL provides immediate feedback, facilitating debugging and rapid code iteration. - **Rapid Prototyping:** With the REPL, programmers can experiment and prototype ideas quickly without needing a full compile-and-run cycle. #### 4. Higher-Order Functions Lisp introduced the concept of higher-order functions, which treat functions as first-class values. This has led to many innovations in functional programming: - **Abstract Power:** Higher-order functions allow writing more abstract and reusable code, enhancing modularity and maintainability. - **Powerful Libraries:** Lisp has developed a wide range of libraries based on higher-order functions, like `mapcar` and `reduce`, which simplify data collection manipulation. #### 5. Automatic Memory Management Lisp was one of the first languages to introduce automatic memory management through garbage collection: - **Safety and Reliability:** Garbage collection reduces the likelihood of memory errors, such as memory leaks, increasing software safety and reliability. - **Code Simplicity:** By freeing programmers from manual memory management, Lisp allows writing simpler code focused on application logic. #### 6. Mixed Programming Paradigm Lisp supports both functional and imperative programming, allowing programmers to choose the best approach for the problem at hand: - **Flexibility:** This flexibility makes Lisp suitable for a wide range of applications, from academic research to commercial development. - **Continuous Innovation:** Lisp has influenced many modern languages, such as Python, Ruby, and JavaScript, which incorporate features from functional programming. Lisp is a language that has continually innovated and influenced the field of programming. Its distinctive features, such as the list-based structure, powerful macros, REPL, higher-order functions, automatic memory management, and support for mixed programming paradigms, have made Lisp a forerunner of many modern technologies. Its legacy continues to live on, demonstrating that the fundamental ideas of Lisp are timeless and relevant even today.

francescoagati

Number of Provinces | LeetCode

class Solution { public int findCircleNum(int[][] isConnected) { int n =...

https://dev.to/tanujav/number-of-provinces-leetcode-2p1g

java, beginners, algorithms, leetcode

``` java class Solution { public int findCircleNum(int[][] isConnected) { int n = isConnected.length; int visited[] = new int[n]; int count = 0; for(int i=0; i<n; i++){ if(visited[i]==0){ dfs(isConnected, i, visited, n); count++; } } return count; } void dfs(int grid[][], int u, int visited[], int n){ visited[u] = 1; for(int i=0; i<n; i++){ if(grid[u][i]==1 && visited[i]==0) dfs(grid, i, visited, n); } } } ``` Thanks for reading :) Feel free to comment and like the post if you found it helpful Follow for more 🤝 && Happy Coding 🚀 If you enjoy my content, support me by following me on my other socials: https://linktr.ee/tanujav7

tanujav

Sql, table 모두 삭제

SELECT Concat('DROP TABLE ', table_schema, '.', TABLE_NAME, ';') FROM INFORMATION_SCHEMA.TABLES...

https://dev.to/sunj/sql-table-modu-sagje-3c20

sql, mysql

``` SELECT Concat('DROP TABLE ', table_schema, '.', TABLE_NAME, ';') FROM INFORMATION_SCHEMA.TABLES where table_schema = '데이터베이스이름'; ``` ``` foreign_key 무시 set foreign_key_checks = 0; ``` _참조 : https://velog.io/@cykim_/MySQL-%ED%85%8C%EC%9D%B4%EB%B8%94-%EC%A0%84%EC%B2%B4-%EC%82%AD%EC%A0%9C_

sunj

THE MOST TRUSTED BTC AND ETH RECOVERY COMPANY IS MUYERN TRUST HACKER

In the digital age, where opportunities and risks coexist equally, MUYERN TRUST HACKER emerges as a...

https://dev.to/pamela_deaver/the-most-trusted-btc-and-eth-recovery-company-is-muyern-trust-hacker-202g

In the digital age, where opportunities and risks coexist equally, MUYERN TRUST HACKER emerges as a guiding force, offering solace and support to those who fall by the intricate web of online scams and frauds. Their name carries weight, synonymous with reliability and resilience in the face of adversity, The recounted tale of financial ruin serves as a poignant reminder of the pervasive threats that bloom in the virtual realm. Amidst the chaos, MUYERN TRUST HACKER stands tall, a beacon of support for those navigating the murky waters of cybercrime. Theirs is a mission defined by unwavering dedication and unwavering resolve, a testament to their commitment to safeguarding the interests of their clients. What distinguishes MUYERN TRUST HACKER is its unwavering commitment to transparency and accountability. Rooted in a foundation of trust, they approach each case with meticulous care and attention to detail. Theirs is a journey guided by integrity, where the pursuit of justice takes precedence above all else. In the case under scrutiny, MUYERN TRUST HACKER's response was nothing short of remarkable. Armed with a wealth of knowledge and expertise in cybercrime intervention, they successfully reclaimed every penny of the staggering 10.06 BTC unlawfully seized from the victim through careful investigation and strategic intervention. Their triumph was not merely financial but symbolic, a testament to the indomitable spirit of those who refuse to be cowed by adversity. But MUYERN TRUST HACKER's impact extends far beyond mere restitution. By empowering individuals to reclaim their autonomy and security in the digital realm, they sow the seeds of resilience and fortitude. Their unwavering dedication to their client's well-being serves as a beacon of hope in an otherwise uncertain world. telegram at: muyerntrusthackertech 

pamela_deaver

Crafting Memorable Experiences: The Role of LED Walls in Entertainment

Creating Memorable Experiences: The impact of an LED Wall An entertainment area is a place that...

https://dev.to/jake_pelfreynjhb_1fea920/crafting-memorable-experiences-the-role-of-led-walls-in-entertainment-4gn7

design

Creating Memorable Experiences: The impact of an LED Wall An entertainment area is a place that utilizes huge screens, large lights, grand noises as well as impressive attractions to make them stand out and also offer recollections for life. They provide the appeal and attention desire, so that not only makes deep impressions but also very important to achieve in memorable experiences. In this regard, today we are going to talk about the remarkable and pretty LED walls which help us in making these moments memorable - even after leaving out from VENUES. Advantages of LED Walls The days of boring, static walls are behind us and these video panels have indeed become an integral part (pun intended) to the thrillin They are packed with features that will take the whole guest experience to another level. With Crystal clear and vibrant images, LED walls can give the audience a truly immersive viewing experience. Also, the fact that they are made of smaller modules is a great advantage as it gives coverage to endless rental led screen design opportunities in shapes and sizes making them perfectly fit for any place. From mesmerizing concert visuals, to exciting sports game displays and breath-taking theatrical performances - the use cases for LED walls are endless. Evolution of LED Wall Technology The advancements in LED wall technology have been a game changer - the list of dynamic, audience-engaging opportunities seems endless thanks to these cutting edge displays. It is possible to program LED walls even in such the way that they respond and reflect performers, or elements of the audience themselves: transforming a concert into an interactive performance which can truly engage its viewers. The fantasy of sci-fi movies has level matched this type interactivity - and made it real, exciting entertainment. Safety Measures for LED Walls One thing that we cannot ignore in any case for working with LED walls is Safety. Luckily, design has evolved to feature a secure locking mechanism which secures the individual modules in practically all kinds of weather conditions - even high-wind situations. Furthermore, the adoption of outdoor resilient lightweight materials has greatly improved the safety prospects for LED walls - this is a device that no longer requires even its own insurance policy if deployed during an outdoor event where reliability is critical. How to Use an LED Wall Because new LED walls can easily seem intimidating to operate, but actually are the contrary. End users can simply assemble the LED wall or screen freely by linking one panel after another. Once put together, the LED wall can also be programmed to outdoor led screen display a variety of images or videos which just adds another layer of dynamism to any event. Service and Quality It is important as this will decide whether you have a complete solution from deployment to maintenance of the LED wall. You should always work with excellent service and products from a vendor to ensure the best performance of your LED wall over time. On top of that, you should also choose vendors who can provide exceptionally high-quality LCD, OLED or QLED panels because in the long run this little thing (using premium products) is going to impact a lot your LED wall's performance and success. Applications of LED Walls LED walls prove their adaptability and overall video utility across a vast number of settings, events, you name it. From the high-octane, pulsating energy of a music festival to the exacting discipline and athleticism required for professional sports events; from comedians keeping them laughing their rental led display screen heads off at stages across conventions like DevLearn Las Vegas 2019 later this month to get inspired by informative speakers on-stage during any configuration conference or ponder over cool trade show displays - well-designed LED walls fit everywhere. Additionally, they also become meaningful outdoor advertising billboards and interesting indoor exhibition in shopping malls that showcase bakeries or other retailers. Conclusion LED walls can, then for all intents and purposes be considered as a game changing technological innovation that is set to transform the entertainment sector. These are the things that contribute to them deeep in crafting an immersive experience, giving some sense of greater security and a long list of features; which make it even more important for you when making memories with your guests. Opt for an established vendor who prides themselves on the highest customer service standards and whose product is of only exceptional quality - your LED wall, which has served you so well thus far will be able to continue its outstanding performance among today's latest innovations years down the line.

jake_pelfreynjhb_1fea920

Best E-Commerce FREE Word Press Theme

Free WooCommerce theme for WordPress. This theme supports popular page builders like Elementor,...

https://dev.to/code_guruva_204d4e19ed643/best-e-commerce-free-word-press-theme-39oo

Free WooCommerce theme for WordPress. This theme supports popular page builders like Elementor, KingComposer, Beaver Builder, SiteOrigin, Thrive Architect, Divi, Brizy, Visual Composer, etc. Theme [DEMO](https://envothemes.com/envo-storefront/) Theme [DOWNLOAD](https://codeguruva.blogspot.com/2018/02/envo-store-front.html)

code_guruva_204d4e19ed643

Understanding OAuth 2.0

What is OAuth 2.0? OAuth 2.0 is an authorization framework that allows third-party...

https://dev.to/looph0le/understanding-oauth-20-3i8b

webdev, systems, backend

## What is OAuth 2.0? OAuth 2.0 is an authorization framework that allows third-party services to exchange access to user information without revealing the user’s credentials. Instead of sharing credentials, OAuth 2.0 uses access tokens to grant access. This mechanism is widely adopted by major platforms like Google, Facebook, and GitHub. ## Key Concepts and Components ### 1. **Resource Owner (User)** The resource owner is the user who owns the data stored on the resource server. They grant access to this data to third-party applications. ### 2. **Client (Application)** The client is the third-party application that wants to access the user's data on the resource server. It needs authorization from the resource owner to obtain access tokens. ### 3. **Authorization Server** The authorization server is responsible for authenticating the resource owner and issuing access tokens to the client after successful authentication and authorization. ### 4. **Resource Server** The resource server hosts the protected resources and accepts access tokens from the client to serve the requested resources. ### 5. **Access Token** An access token is a string representing the authorization granted to the client. It is issued by the authorization server and used by the client to access protected resources on the resource server. ### 6. **Refresh Token** A refresh token is used to obtain a new access token without requiring the resource owner to re-authenticate. This enhances user experience by maintaining seamless access. ## OAuth 2.0 Authorization Flow OAuth 2.0 supports several authorization flows tailored for different scenarios. The most common flows are: ### 1. **Authorization Code Grant** The authorization code grant is suitable for web applications and involves the following steps: 1. **Authorization Request** - The client directs the resource owner to the authorization server's authorization endpoint. - The resource owner authenticates and grants permission. - The authorization server redirects the resource owner to the client with an authorization code. 2. **Token Exchange** - The client exchanges the authorization code for an access token by making a request to the authorization server's token endpoint. - The authorization server verifies the authorization code and issues an access token (and optionally a refresh token). 3. **Access Resource** - The client uses the access token to access protected resources on the resource server. ### 2. **Implicit Grant** The implicit grant is optimized for client-side applications, such as single-page applications (SPAs). It omits the token exchange step, directly issuing an access token. 1. **Authorization Request** - The client directs the resource owner to the authorization server's authorization endpoint. - The resource owner authenticates and grants permission. - The authorization server redirects the resource owner to the client with an access token embedded in the URL fragment. 2. **Access Resource** - The client extracts the access token from the URL fragment and uses it to access protected resources on the resource server. ### 3. **Resource Owner Password Credentials Grant** This flow is used in highly trusted applications, such as the official client of a service, where the resource owner’s credentials are directly shared with the client. 1. **Credentials Submission** - The client collects the resource owner's username and password. - The client sends these credentials to the authorization server's token endpoint. 2. **Token Issuance** - The authorization server verifies the credentials and issues an access token (and optionally a refresh token). 3. **Access Resource** - The client uses the access token to access protected resources on the resource server. ### 4. **Client Credentials Grant** The client credentials grant is used for server-to-server communication, where the client is acting on its own behalf rather than on behalf of a user. 1. **Token Request** - The client sends its own credentials to the authorization server's token endpoint. 2. **Token Issuance** - The authorization server verifies the client credentials and issues an access token. 3. **Access Resource** - The client uses the access token to access protected resources on the resource server. ## Security Considerations OAuth 2.0 addresses various security concerns through several mechanisms: - **Scopes:** Define the level of access requested by the client. - **State Parameter:** Prevents CSRF attacks by maintaining state between the client and authorization server. - **PKCE (Proof Key for Code Exchange):** Enhances security in public clients by mitigating interception attacks. ## Conclusion OAuth 2.0 has revolutionized the way third-party applications interact with user data, providing a secure and scalable framework for authorization. Understanding its components, flows, and security measures is essential for developers to implement OAuth 2.0 effectively. By leveraging OAuth 2.0, applications can enhance user experience and data security, fostering trust and reliability in digital interactions. Whether you're developing a web application, a mobile app, or a server-to-server integration, OAuth 2.0 offers a versatile and robust solution for managing authorization in the modern digital landscape.

looph0le

Exploring the Benefits of Digital Signage for Businesses

Engaging in the Universe of Digital Signage for Businesses Ever been to a store and one that grabs...

https://dev.to/jake_pelfreynjhb_1fea920/exploring-the-benefits-of-digital-signage-for-businesses-3p43

design

Engaging in the Universe of Digital Signage for Businesses Ever been to a store and one that grabs your attention is the vibrant screen with advertisements, offers? Well friends, that beautiful display is called digital signage! This is an unconventional and contemporary style that businesses use to reach communications with their customer, giving customers the last user experience. This is because we are going to talk about a few advantages of digital signage and its multiple applications that will take your business marketing brand strategies up the notch. Advantages of Digital Signage Digital Signage Benefits for Businesses Second, it is a dynamic way of communicating with the masses. Digital signage, on the other hand gives you quick digestible information as opposed to traditional printed advertising. Good signage can attract even the most distracted pedestrian or fastest-moving window shopper, and it often helps them remember what they saw as well. Digital signage can also rotate through multiple types of content at different times (so the information is always up to date), making it a far more diverse medium. Digital Signage : A Marketing Innovation Digital signage is not just a display screen, but its ability to market your company helps it make an impact! Creative elements along with video will allow you to deliver your message in an attention-grabbing and visually appealing way, catching the eye of consumers. This provides an opportunity to reach out with tailored messaging and similarly, they are an excellent brand statement for how you display your Backpack Display Machine products. On top of this, digital signage enables interactive elements such as touchscreens, QR codes and social media links to further engage audiences and provide a more tailored customer experience. Digital Signage: Safety First More than creating business revenue, the digital signage also serves as an important role of security and safety in public places. This is particularly relevant in the current circumstances of lockdown due to COVID-19 where digital signage has become an essential device for communicating essential messages with customers. Store entrances can have signs to let customers know about the basic safety protocols (masks, social distancing, and occupancy limits). Digital signage facilitates communication by presenting safety guidelines in a more efficient way than traditional paper signs and verbal reminders from staff. Dealing with digital signage How to Make Digital Signage Sounds simpler than you think, right? First, you will need to purchase the right equipment for your business. This includes an HD display screen and a media player that is responsible for content organization. You can seek professional assistance or you may manage the signage yourself as well. Then, use the creativity to generate this visually appealing and engaging content. There are a lot of software tools out there that allow you to Interactive Whiteboard design and manage your content. Subsequently program the media player to render the content and maintain a rotation schedule. Customer Service Improvement Features for Digital Signage In business, the goal is to provide and digital signage becomes a brilliant weapon in this sense. You can strategically place signs around your store or facility to communicate information about the products and services available to customers. A key feature of digital signage is to answer common questions (FAQ) without any human intervention, freeing staff from the need to assist customers with basic exchanges and requests for directions. This frees employees up at other information points or providing expert advice elsewhere on complicated matters as well. At its core, digital signage is a second customer service agent that can quickly and easily help resolve issues. Applications in differenct industries From this discussion, it is clear that Digital Signage stands as the potential superordinate to all industries and has proven itself exceedingly beneficial in every sector. From advertising upcoming events in shopping centres, to displaying menus at restaurants and announcing arrivals and departures at airports or showcasing new products in a retail store these signs have many uses. While in waiting areas they can update clients on a range of services or display educational content. In the same way healthcare institutions like hospitals and clinics use digital screens for patient and visitor information on medical procedures, service notices etc. In Conclusion In other words, digital signage is a disrupting agent in the world of marketing and many advantages await those who dare to adopt it. This tool renewed the potential not only to distribute critical information but also for Digital Kiosk Display product and service promotion, to improve customer support, and that at a public safety perspective. However, as the technology has improved digital signage is both more affordable and easier to access than ever before... making it a smart investment for any business. As the world goes under digital transformation, keeping up with technology helps to get new customers and keep old ones. So, why delay any longer? Welcome digital signage to perceive how much it can do for your business.

jake_pelfreynjhb_1fea920

Deploying a React Application to Production: A Comprehensive Guide

In the world of web development, deploying a React application to production is a crucial step in...

https://dev.to/vyan/deploying-a-react-application-to-production-a-comprehensive-guide-4pm

webdev, javascript, beginners, react

In the world of web development, deploying a React application to production is a crucial step in making your application available to users. There are several methods and platforms available for deploying React applications, each with its own set of advantages and considerations. In this blog post, we will explore various deployment options for React applications, including Vercel, virtual machines, CDNs, and containerization with Kubernetes. ## Deploying with Vercel Vercel is a popular platform for deploying modern web applications, including React applications. It provides a seamless deployment experience with features like automatic SSL certificates, serverless functions, and preview deployments. To deploy a React application to Vercel, you can simply link your GitHub repository to Vercel and trigger automatic deployments whenever you push a new commit. **Example:** 1. Create a new React project using Create React App: ``` npx create-react-app my-react-app cd my-react-app ``` 2. Initialize a Git repository and push your code to GitHub: ``` git init git add . git commit -m "Initial commit" git remote add origin <github-repository-url> git push -u origin master ``` 3. Connect your GitHub repository to Vercel: - Visit the Vercel dashboard and import your GitHub repository. - Configure your deployment settings and domain. - Trigger automatic deployments whenever you push new code to GitHub. ## Deploying on Virtual Machines Deploying a React application on virtual machines gives you more control over the infrastructure and allows you to customize the server environment to suit your needs. You can use services like AWS EC2, Google Compute Engine, or DigitalOcean to provision virtual machines and deploy your React application. However, managing virtual machines requires more technical expertise and maintenance compared to platform-as-a-service (PaaS) solutions like Vercel. **Example:** 1. Provision a virtual machine on AWS EC2: - Launch an EC2 instance with the desired configuration. - SSH into the instance and install Node.js, npm, and other dependencies. - Clone your React project repository and build the project. 2. Set up a reverse proxy (e.g., Nginx) to serve your React application: - Configure Nginx to proxy requests to your React app. - Start the Nginx service and access your React application through the VM's public IP. ## Using CDNs for Hosting Content Delivery Networks (CDNs) can be used to host static assets of a React application, such as HTML, CSS, and JavaScript files. By leveraging a CDN, you can distribute your assets across multiple edge servers worldwide, improving the loading speed and reliability of your application. Popular CDN providers like Cloudflare, Akamai, and Amazon CloudFront offer easy integration with React applications for efficient content delivery. **Example:** 1. Upload your built React application to a CDN provider like Cloudflare: - Configure a new CDN distribution and point it to your React application assets. - Use the CDN URL to access your React application, benefiting from faster content delivery. ## Containerization with Kubernetes Containerization with Kubernetes offers a scalable and reliable way to deploy React applications in production. By packaging your application into containers and orchestrating them with Kubernetes, you can easily manage resource allocation, scaling, and monitoring of your application. Kubernetes enables features like auto-scaling, rolling updates, and service discovery, making it a powerful platform for deploying complex React applications. **Example:** 1. Dockerize your React application: - Create a Dockerfile to build your React app image. - Build the Docker image and push it to a container registry like Docker Hub. 2. Deploy your Dockerized React app on Kubernetes: - Define Kubernetes manifests (Deployment, Service, Ingress) to deploy and expose your React app. - Apply the manifests to your Kubernetes cluster to start running your React application. In conclusion, deploying a React application to production requires careful consideration of your project's requirements, scalability needs, and technical proficiency. Whether you choose Vercel for its simplicity, virtual machines for customization, CDNs for performance, or Kubernetes for scalability, each deployment method has its own advantages and trade-offs. By understanding the strengths of these deployment options and following the examples provided, you can choose the right approach to successfully launch your React application and deliver a seamless user experience. --- In this blog post, we covered various deployment options for React applications, including Vercel, virtual machines, CDNs, and containerization with Kubernetes, along with examples to guide you through the deployment process. Feel free to reach out if you have any further questions or need assistance with deploying your React application.

vyan

Understanding .NET Core Service Lifetimes: A Beginner's Guide

When building applications with .NET Core, managing the lifecycle of your services is crucial for...

https://dev.to/mahendraputra21/understanding-net-core-service-lifetimes-a-beginners-guide-1d3a

csharp, dotnet, beginners, learning

When building applications with .NET Core, managing the lifecycle of your services is crucial for maintaining a clean and efficient codebase. .NET Core's dependency injection (DI) framework provides three types of service lifetimes: Singleton, Scoped, and Transient. Understanding these lifetimes helps you control how services are created and managed throughout your application. Let's explore each service lifetime in detail. --- ## What is Dependency Injection? Before diving into service lifetimes, let's briefly understand dependency injection (DI). DI is a design pattern that allows an object to receive its dependencies from an external source rather than creating them itself. This approach promotes loose coupling and makes your code more modular, testable, and maintainable. In .NET Core, DI is built-in and services are registered in the `Startup` class, typically in the `ConfigureServices `method. --- ## Service Lifetimes in .NET Core .NET Core defines three service lifetimes: Singleton, Scoped, and Transient. Each has its own use case and behavior. **1. Singleton** A Singleton service is created once and shared across the entire application lifetime. It is ideal for services that maintain state or need to be reused globally. Here’s how it works: - **Lifetime:** The service is created once and reused for every subsequent request. - **Use Case:** Ideal for stateful services, configuration settings, or services that are expensive to create. Example: ```csharp public void ConfigureServices(IServiceCollection services) { services.AddSingleton<IMySingletonService, MySingletonService>(); } ``` In this example, `MySingletonService `is registered as a singleton, ensuring only one instance is created and shared. **2. Scoped** A Scoped service is created once per client request. This is useful for services that should be unique per request but reused within that request. Here’s how it works: - **Lifetime:** The service is created once per HTTP request and shared within that request. - **Use Case:** Ideal for database contexts or unit of work patterns where a new instance is needed per request. Example: ```csharp public void ConfigureServices(IServiceCollection services) { services.AddScoped<IMyScopedService, MyScopedService>(); } ``` In this example, `MyScopedService `is registered as scoped, ensuring a new instance is created for each request. **3. Transient** A Transient service is created each time it is requested. This is useful for lightweight, stateless services. Here’s how it works: - **Lifetime:** A new instance is created every time the service is requested. - **Use Case:** Ideal for stateless services, utilities, or lightweight operations. Example: ```csharp public void ConfigureServices(IServiceCollection services) { services.AddTransient<IMyTransientService, MyTransientService>(); } ``` In this example, `MyTransientService `is registered as transient, ensuring a new instance is created each time it’s needed. --- ## Choosing the Right Service Lifetime Choosing the appropriate service lifetime depends on your specific requirements: - **Singleton:** Use for shared, stateful services or expensive-to-create objects that need to be reused. - **Scoped:** Use for per-request services, like database contexts, to ensure a new instance is used within each request. - **Transient:** Use for lightweight, stateless services that can be created frequently without significant overhead. --- ## Conclusion Understanding .NET Core service lifetimes is crucial for building efficient and scalable applications. By choosing the right service lifetime, you can ensure your services are created and managed appropriately, leading to better performance and maintainability. Whether you need a singleton for shared state, scoped for per-request instances, or transient for lightweight tasks, .NET Core’s DI framework provides the flexibility to meet your needs.

mahendraputra21

How the VTable component progressively loads sub-nodes in a list?

Question title How to progressively load sub-nodes in a list with the VTable component? ...

https://dev.to/rayssss/how-the-vtable-component-progressively-loads-sub-nodes-in-a-list-5hhm

visactor, vtable

### Question title How to progressively load sub-nodes in a list with the VTable component? ### Problem description Using the VTable table component, how to gradually load sub-nodes in the list, click the expand button of the parent node, and then dynamically load the information of the sub-node ### Solution VTable provides `setRecordChildren`API to update the sub-node status of a node, which can be used to implement progressive loading function 1. Data preparation Normally, in the data of the tree structure list, the `children`attribute is an array, which is the sub-node information of the node ```typescript { name: 'a', value: 10, children: [ { name: 'a-1', value: 5, children: [ // ...... ] }, // ...... ] } ``` How to dynamically load sub-node information, you can configure the `children`property to `true`. At this time, the node will be displayed as the parent node in the table, but clicking the expand button in the cell will trigger relevant events, but the table will not have any active changes. 1. Monitoring events After the expand button is clicked, the `VTable. ListTable.EVENT_TYPE`event will be triggered. You need to listen to this event and use the `setRecordChildren`API to update the sub-node information ```typescript const { TREE_HIERARCHY_STATE_CHANGE } = VTable.ListTable.EVENT_TYPE; instance.on(TREE_HIERARCHY_STATE_CHANGE, args => { if (args.hierarchyState === VTable.TYPES.HierarchyState.expand && !Array.isArray(args.originData.children)) { setTimeout(() => { const children = [ { name: 'a-1', value: 5, }, { name: 'a-2', value: 5 } ]; instance.setRecordChildren(children, args.col, args.row); }, 200); } }); ``` ### Code example demo：https://visactor.io/vtable/demo/table-type/list-table-tree-lazy-load ### Related Documents Related api: https://visactor.io/vtable/option/ListTable-columns-text#tree Tutorial: https://visactor.io/vtable/guide/table_type/List_table/tree_list github：https://github.com/VisActor/VTable

rayssss

How the VTable component progressively loads sub-nodes in pivot tables

Question title How to progressively load sub-nodes in a pivot table using the VTable...

https://dev.to/rayssss/how-the-vtable-component-progressively-loads-sub-nodes-in-pivot-tables-2n60

visactor, vtable

### Question title How to progressively load sub-nodes in a pivot table using the VTable component? ### Problem description Using the VTable table component, how to gradually load sub-nodes in the pivot table, click the expand button of the parent node, and then dynamically load the information of the sub-node ### Solution VTable provides `setTreeNodeChildren`API, which is used to update the sub-node status of a node in the pivot structure and can be used to implement progressive loading function 1. Dimension tree configuration Normally, in the dimension tree (columnTree/rowTree), the `children`attribute is an array, which is the sub-node information of the node ```typescript { dimensionKey: 'name', value: 'a', children: [ { dimensionKey: 'name-1', value: 'a-1', children: [ // ...... ] }, // ...... ] } ``` How to dynamically load sub-node information, you can configure the `children`property to `true`. At this time, the node will be displayed as the parent node in the table, but clicking the expand button in the cell will trigger relevant events, but the table will not have any active changes. 1. Monitoring events After the expand button is clicked, the `VTable. ListTable.EVENT_TYPE`event will be triggered. You need to listen to this event and use the `setTreeNodeChildren`API to update the sub-node information and the corresponding increased data ```typescript const { TREE_HIERARCHY_STATE_CHANGE } = VTable.ListTable.EVENT_TYPE; instance.on(TREE_HIERARCHY_STATE_CHANGE, args => { if (args.hierarchyState === VTable.TYPES.HierarchyState.expand && !Array.isArray(args.originData.children)) { setTimeout(() => { const newData = [ // ...... ]; const children = [ { dimensionKey: 'name-1', value: 'a-1', }, { dimensionKey: 'name-1', value: 'a-2' } ]; instance.setTreeNodeChildren(children, newData, args.col, args.row); }, 200); } }); ``` ### Code example demo：https://visactor.io/vtable/demo/table-type/pivot-table-tree-lazy-load ### Related Documents Related api: https://visactor.io/vtable/option/PivotTable#rowHierarchyType ('grid'% 20% 7C% 20'tree ') Tutorial: https://visactor.io/vtable/guide/table_type/Pivot_table/pivot_table_tree github：https://github.com/VisActor/VTable

rayssss

Revolutionizing Database Migration: From MongoDB to SQL with AI

In the ever-evolving landscape of data management, the need for efficient and seamless database...

https://dev.to/coderbotics_ai/revolutionizing-database-migration-from-mongodb-to-sql-with-ai-1809

ai, database, mongodb, sql

In the ever-evolving landscape of data management, the need for efficient and seamless database migration has never been greater. At CoderboticsAI, we are at the forefront of this transformation, leveraging cutting-edge artificial intelligence to simplify and optimize the migration process. Today, we're excited to share our latest demo video showcasing how our AI-driven solutions can effortlessly migrate databases from MongoDB to SQL. ## **The Importance of Database Migration** Database migration is a critical process for many businesses, whether they are scaling operations, consolidating data systems, or transitioning to more robust platforms. Traditional migration methods can be time-consuming, error-prone, and resource-intensive. However, with advancements in AI, we can now perform these migrations with greater accuracy, speed, and minimal downtime. ## **Why Migrate from MongoDB to SQL?** MongoDB and SQL databases serve different purposes and offer unique advantages. MongoDB, a NoSQL database, is known for its flexibility and scalability, making it ideal for handling unstructured data. On the other hand, SQL databases are renowned for their reliability, consistency, and powerful querying capabilities, which are essential for structured data and complex transactions. Migrating from MongoDB to SQL might be necessary for various reasons: **Enhanced Data Integrity:** SQL databases ensure data integrity through ACID (Atomicity, Consistency, Isolation, Durability) properties. **Advanced Querying:** SQL offers robust querying capabilities that can handle complex queries efficiently. **Better Reporting and Analysis:** SQL databases are well-suited for reporting and data analysis, which is crucial for business intelligence. ## **How CoderboticsAI Transforms Database Migration** Our proprietary AI technology is designed to streamline the migration process, ensuring that your data is transferred accurately and efficiently. Here's a glimpse into how our system works: **1. Automated Schema Mapping** One of the most challenging aspects of database migration is schema mapping. Our AI algorithms automatically analyze the MongoDB schema and map it to the corresponding SQL schema. This automated process reduces the risk of human error and ensures a smooth transition. **2. Data Transformation and Cleaning** Data formats in MongoDB can differ significantly from those in SQL. Our AI handles the necessary data transformations, ensuring that all data conforms to the SQL standards. Additionally, our system performs data cleaning to remove any inconsistencies or redundancies. **3. Efficient Data Transfer** Our solution uses optimized data transfer protocols to move data from MongoDB to SQL swiftly. We prioritize minimizing downtime and ensuring data integrity throughout the process. **4. Validation and Testing** Post-migration, our AI performs thorough validation and testing to ensure that all data has been accurately transferred and that the new SQL database functions as expected. ## **Benefits of Choosing CoderboticsAI** By partnering with CoderboticsAI for your database migration needs, you can expect: **Reduced Migration Time:** Our AI-driven approach significantly cuts down on migration time, allowing you to resume normal operations quickly. **Improved Accuracy:** Automated schema mapping and data transformation ensure that your data is accurately migrated without manual errors. **Cost Efficiency:** Reduced downtime and faster migration mean lower operational costs. **Scalability:** Our solutions are scalable to handle databases of all sizes and complexities. **Contact Us** Ready to revolutionize your database migration process? Contact us today to learn more about how CoderboticsAI can help your business achieve seamless and efficient database migration from MongoDB to SQL. Join the waitlist [here](https://forms.gle/MRWfbYkjHUqL4U368) to get notified. Follow us on [Linkedin](https://www.linkedin.com/company/coderbotics-ai) [Twitter](https://x.com/coderbotics_ai) [YouTube](https://www.youtube.com/@coderbotics_ai)

coderbotics_ai

How to customize highlighted cells in the VTable component

Question title How to customize highlighted cells in the VTable component? ...

https://dev.to/rayssss/how-to-customize-highlighted-cells-in-the-vtable-component-1oid

visactor, vtable

### Question title How to customize highlighted cells in the VTable component? ### Problem description How to customize highlighted cells and specify the highlighting style using the VTable table component? ### Solution VTable supports custom cell styles, which can be used to implement custom highlighting function. #### Registration style First, you need to register a custom style Need to define `id`and `style`two attributes: - Id: the unique id of the custom style - Style: Custom cell style, the same as the `style`configuration in the `column`, the final presentation effect is the fusion of the original cell style and the custom style Custom style registration is divided into two ways, `option`configuration and API configuration: - The customCellStyle property in the option option receives an array composed of multiple custom style objects. ```javascript // init option const option = { // ...... customCellStyle: [ { id: 'custom-1', style: { bgColor: 'red' } } ] } ``` - The API can register custom styles through the `registerCustomCellStyle`methods provided by the VTable instance: ```javascript instance.registerCustomCellStyle(id, style) ``` #### Assignment style To use a registered custom style, you need to assign the custom style to the cell. Assignment requires defining two properties, `cellPosition`and `customStyleId`: - cellPosition: Cell position information, supports configuring individual cells and cell ranges. - Single cell: `{row: number, col: number}` - Cell range: `{range: {start: {row: number, col: number}, end: {row: number, col: number}}}` - customStyleId: Custom style id, the same as the id defined when registering custom styles There are two ways to allocate, configure in `option`and configure using API: - The `customCellStyleArrangement`property in option receives an array of custom assignment style objects: ```javascript // init option const option = { // ...... customCellStyleArrangement: [ { cellPosition: { col: 3, row: 4 }, customStyleId: 'custom-1' }, { cellPosition: { range: { start: { col: 5, row: 5 }, end: { col: 7, row: 7 } } }, customStyleId: 'custom-2' } ] } ``` - The API can assign custom styles through the `arrangeCustomCellStyle`methods provided by the VTable instance: ```javascript instance.arrangeCustomCellStyle(cellPosition, customStyleId) ``` #### Update and delete styles Custom style After registration, you can update the custom style of the same id through `registerCustomCellStyle`method. After the update, the cell style of the assigned custom style will be updated; if `newStyle`is `undefined`| `null`, it means to delete the custom style. After deletion, the cell style of the assigned custom style will restore the default style ```javascript instance.registerCustomCellStyle(id, newStyle) ``` The assigned custom style cell area can be updated by `arrangeCustomCellStyle`method, and the style of the cell area will be updated after the update; if the `customStyleId`is `undefined`| `null`, it means that the restored cell style is the default style ### Code example demo：https://visactor.io/vtable/demo/custom-render/custom-style ### Related Documents Related api: https://visactor.io/vtable/option/ListTable-columns-text#style.fontSize github：https://github.com/VisActor/VTable

rayssss

How to set the text style of the VTable table component?

Question title How to set text style for VTable component? Problem...

https://dev.to/rayssss/how-to-set-the-text-style-of-the-vtable-table-component-196n

visactor

### Question title How to set text style for VTable component? ### Problem description What text styles are supported and how to configure them when using the VTable table component? ### Solution VTable supports the following text styles: - `fontSize`: The font size of the text. - `FontFamily`: Font used for text. Multiple fonts can be specified, such as `Arial, sans-serif`, and the browser will search and use them in the specified order. - `FontWeight`: Set font thickness. - `FontVariant`: Sets the font variant. - `fontStyle`: Set font style. The places where VTable supports setting text styles are: - `Column (row/indicator)`, configure the style corresponding to the column (row/indicator) - `Style`: The style corresponding to the content cell - `headerStyle`: the style corresponding to the header cell - `In theme`, configure the theme style - `defaultStyle`: default style - `bodyStyle`: table content area style - `headerStyle`: header (list)/list header (pivot table) style - `rowHeaderStyle`: Row header style - `cornerHeaderStyle`: corner head style - `bottomFrozenStyle`: Bottom frozen cell style - `rightFrozenStyle`: Freeze cell style on the right ### Code example You can paste it into the official website editor for testing: [https://visactor.io/vtable/demo/table-type/list-table](https%3A%2F%2Fvisactor.io%2Fvtable%2Fdemo%2Ftable-type%2Flist-table) ```typescript let tableInstance; fetch('https://lf9-dp-fe-cms-tos.byteorg.com/obj/bit-cloud/VTable/North_American_Superstore_data.json') .then((res) => res.json()) .then((data) => { const columns =[ { "field": "Order ID", "title": "Order ID", "width": "auto", style: { fontSize: 14 }, headerStyle: { fontSize: 16, fontFamily: 'Verdana' } }, { "field": "Customer ID", "title": "Customer ID", "width": "auto" }, { "field": "Product Name", "title": "Product Name", "width": "auto" }, { "field": "Category", "title": "Category", "width": "auto" }, { "field": "Sub-Category", "title": "Sub-Category", "width": "auto" }, { "field": "Region", "title": "Region", "width": "auto" } ]; const option = { records:data, columns, widthMode:'standard', theme: VTable.themes.DEFAULT.extends({ bodyStyle: { fontSize: 12 }, headerStyle: { fontSize: 18 } }) }; tableInstance = new VTable.ListTable(document.getElementById(CONTAINER_ID),option); window['tableInstance'] = tableInstance; }) ``` ### Related Documents Related api: https://visactor.io/vtable/option/ListTable-columns-text#style.fontSize github：https://github.com/VisActor/VTable

rayssss

Learn C Programming: Fibonacci Series Generation

The Fibonacci Series is a series of numbers where each number is the sum of the two preceding numbers. In this lab, you will learn how to write a program in C to generate the Fibonacci Series.

https://labex.io/tutorials/c-fibonacci-series-generation-in-c-123246

c, coding, programming, tutorial

## Introduction The Fibonacci Series is a series of numbers where each number is the sum of the two preceding numbers. In this lab, you will learn how to write a program in C to generate the Fibonacci Series. ## Open the `main.c` file To begin, open the `main.c` file in your preferred text editor. This file has been created in the `~/project/` directory. ## Declare variables In this step, you will declare all of the variables that you will be using in the program. The variables required for this program are as follows: - `num`: An integer to store the number of terms of the Fibonacci Series to be generated. - `a`: An integer to store the first number of the series. - `b`: An integer to store the second number of the series. - `c`: An integer to store the sum of the preceding two numbers. - `i`: An integer to count the number of terms generated so far. ```c #include <stdio.h> #include <stdlib.h> #include <conio.h> void fibonacci(int num); int main() { int num = 0; printf("Enter number of terms: "); scanf("%d", &num); fibonacci(num); return 0; } ``` ## Define the `fibonacci()` function In this step, you will define the `fibonacci()` function. This function takes one argument, `num`, which represents the number of terms of the Fibonacci Series to be generated. The function uses a `while` loop to generate the series. ```c void fibonacci(int num) { int a, b, c, i = 3; a = 0; b = 1; if(num == 1) printf("%d",a); if(num >= 2) printf("%d\t%d", a, b); while(i <= num) { c = a + b; printf("\t%d", c); a = b; b = c; i++; } } ``` ## Run the program To run the program, compile and execute the `main.c` file. The program will prompt the user to enter the number of terms of the Fibonacci Series to be generated. Once the input is provided, the program will generate the series and display it on the screen. ```c #include <stdio.h> #include <stdlib.h> #include <conio.h> void fibonacci(int num); int main() { int num = 0; printf("Enter number of terms: "); scanf("%d", &num); fibonacci(num); return 0; } void fibonacci(int num) { int a, b, c, i = 3; a = 0; b = 1; if(num == 1) printf("%d",a); if(num >= 2) printf("%d\t%d", a, b); while(i <= num) { c = a + b; printf("\t%d", c); a = b; b = c; i++; } } ``` ## Summary In this lab, you learned how to write a C program to generate the Fibonacci Series. You were introduced to the concept of functions and loops. You also learned how to declare and define variables in C. Finally, you were able to write a program that prompts the user to enter the number of terms of the Fibonacci Series to be generated and generates the series accordingly. --- ## Want to learn more? - 🚀 Practice [Fibonacci Series Generation in C](https://labex.io/tutorials/c-fibonacci-series-generation-in-c-123246) - 🌳 Learn the latest [C Skill Trees](https://labex.io/skilltrees/c) - 📖 Read More [C Tutorials](https://labex.io/tutorials/category/c) Join our [Discord](https://discord.gg/J6k3u69nU6) or tweet us [@WeAreLabEx](https://twitter.com/WeAreLabEx) ! 😄

labby

Understanding LSTM Networks: A Guide to Time Series and Sequence Prediction

In the realm of artificial intelligence and deep learning, Long Short-Term Memory (LSTM) networks...

https://dev.to/monish3004/understanding-lstm-networks-a-guide-to-time-series-and-sequence-prediction-10eb

computerscience, ai, deeplearning

In the realm of artificial intelligence and deep learning, Long Short-Term Memory (LSTM) networks have emerged as a powerful tool for handling time series and sequential data. This blog aims to demystify LSTM networks, explaining their architecture, functioning, and applications. **What is an LSTM Network?** LSTM is a type of recurrent neural network (RNN) designed to overcome the limitations of traditional RNNs, particularly the issue of long-term dependencies. Standard RNNs struggle to remember information from earlier time steps when the gap between relevant information and the point where it's needed becomes too large. LSTMs address this problem with a sophisticated memory cell structure. **The Architecture of LSTM Networks** LSTM networks are composed of units called LSTM cells, each containing three main components: gates, cell state, and hidden state. 1. **Cell State**: This is the memory of the network, carrying information across different time steps. 2. **Gates**: LSTMs have three gates (input, forget, and output gates) that regulate the flow of information. **Forget Gate** The forget gate decides what information should be discarded from the cell state. It takes the previous hidden state and the current input, passes them through a sigmoid function, and outputs a number between 0 and 1. A value of 0 means "completely forget" and 1 means "completely keep".  **Input Gate** The input gate determines what new information should be added to the cell state. It has two parts: a sigmoid layer (to decide which values to update) and a tanh layer (to create new candidate values).   **Output Gate** The output gate decides what the next hidden state should be. This hidden state is also used for predictions.   **How LSTM Works** At each time step, LSTM processes the input data through the gates and updates the cell state and hidden state accordingly. Here's a step-by-step overview: 1. **Forget Step**: The forget gate evaluates which information from the previous cell state should be carried forward. 2. **Input Step**: The input gate assesses and updates the new information. 3. **Update Step**: The cell state is updated by combining the information from the forget and input steps. 4. **Output Step**: The output gate decides the new hidden state, which is used for making predictions and passed to the next time step. **Applications of LSTM Networks** LSTMs are particularly well-suited for: - **Time Series Prediction**: Forecasting stock prices, weather, and other temporal data. - **Natural Language Processing (NLP)**: Language modeling, text generation, machine translation, and sentiment analysis. - **Speech Recognition**: Transcribing spoken words into text. - **Anomaly Detection**: Identifying unusual patterns in data, such as fraud detection. **Conclusion** LSTM networks have revolutionized the way we handle sequential data, providing a robust solution to the challenges posed by long-term dependencies in traditional RNNs. With their unique architecture and gate mechanisms, LSTMs can retain crucial information over extended periods, making them indispensable for a wide range of applications in time series analysis, NLP, and beyond. Whether you're working on predicting stock prices, generating human-like text, or detecting anomalies, LSTM networks offer a powerful toolset to achieve remarkable results.

monish3004

JavaScript Equality Under the Lens: Enhancing React’s Dependency Checks - Part 2

In a previous blog, JavaScript Equality Under the Lens: Enhancing React’s Dependency Checks, we...

https://dev.to/baliachbryan/javascript-equality-under-the-lens-enhancing-reacts-dependency-checks-part-2-5f99

javascript, react, nextjs

In a previous blog, [JavaScript Equality Under the Lens: Enhancing React’s Dependency Checks](https://www.balysnotes.com/javascript-equality-checks), we delved into the nuances of JavaScript data types and their equality checks. We explored values with identity and those without, examining how JavaScript stores objects by reference rather than by value. To address object comparison within React's dependency checks, we devised a method to fetch keys from an object and compare their values, though this method was limited to one level deep. You can find [this original blog post here.](https://www.balysnotes.com/javascript-equality-checks-version-2) In this blog, we'll talk about a new way to do equality checks that will allow us to go n levels deep (rather than just one level) and will still be applicable not only to simple data types like numbers and strings, but also complex structures like objects and arrays. For this approach, we'll rely on an advanced but straightforward technique for value-based comparison of objects using `JSON.stringify` and `JSON.parse`. ### Revisiting Object Equality: The Challenge JavaScript’s intrinsic method of object comparison works by comparing memory references. This means two distinct objects with identical properties and values are considered unequal: ```javascript const objectOne = { key: "value" }; const objectTwo = { key: "value" }; console.log(objectOne === objectTwo); // returns 'false' ``` In our previous blog, we created a function to check equality by manually comparing object keys and values. However, this function was limited to a shallow comparison: ```javascript function shallowEqual(obj1, obj2) { const keys1 = Object.keys(obj1); const keys2 = Object.keys(obj2); if (keys1.length !== keys2.length) return false; for (let key of keys1) { if (obj1[key] !== obj2[key]) return false; } return true; } ``` While this approach was somewhat effective, it fell short when dealing with nested objects and arrays. This is where `JSON.stringify` and `JSON.parse` come into play. ### The Magic of `JSON.stringify` and `JSON.parse` In JavaScript, `JSON.stringify` converts a JavaScript object to a JSON string, while `JSON.parse` parses a JSON string to construct the JavaScript object. By converting objects into strings and comparing these string representations, we can bypass the idiosyncrasies of object reference comparison and handle nested structures efficiently: ```javascript const objectOne = { key: "value" }; const objectTwo = { key: "value" }; console.log(JSON.stringify(objectOne) === JSON.stringify(objectTwo)); // returns 'true' ``` And at the same time still return the original object using `JSON.parse` (if there's this use case). ### Applying JSON Techniques in React This approach is pivotal for React components' dependency checks. Let’s consider an advanced example where we use this technique in a custom hook: ```typescript import { useCallback, useEffect, useMemo, useRef, useState } from "react"; export type ObjType = { [key: string | number | symbol]: any; }; /** * This hook checks for equality even for nested objects or arrays. Only causes a re-render if the [obj] param changes. */ const useObjectEqualityChecker = (obj: ObjType) => { const renders = useRef(0); if (renders.current >= 10) { throw new Error( `Total Renders: ${renders.current}. A tad bit too much ey?` ); } const _internalStringify = useCallback((o: any) => { return JSON.stringify(o); }, []); const _objString = _internalStringify(obj); const currentObjRef = useRef(_internalStringify(obj)); const [currentObj, setCurrentObj] = useState<string>(_internalStringify(obj)); useEffect(() => { if (_objString) { try { if (currentObjRef.current !== _objString) { renders.current += 1; currentObjRef.current = _objString; setCurrentObj(_objString); } } catch (e) { // left blank intentionally. No need for any re-render. } } }, [_objString]); return useMemo(() => { return JSON.parse(currentObj); }, [currentObj]); }; export default useObjectEqualityChecker; ``` This hook can come in handy when building components that take arrays or objects as props, where a developer might have forgotten to use `useCallback` or `useMemo` therefore returning different memory references every render. ### Why This Approach is Better 1. **Value-Based Comparison**: - Unlike reference-based comparison, the JSON-based approach guarantees that objects with the same properties and values will be considered equal, thereby avoiding unexpected re-renders in React. 2. **Depth Coverage**: - This method seamlessly handles nested objects and arrays, ensuring accurate and deep comparisons without the need for custom deep equality functions. 3. **Simplicity and Clarity**: - The technique is straightforward to implement, making your code more readable and less error-prone. It reduces the cognitive load for developers trying to understand object equality logic. 4. **Consistency**: - Standardized behavior of `JSON.stringify` ensures consistency across different environments and usages, avoiding potential pitfalls of manually deep-checking objects or relying on third-party libraries. ### Performance Implications Though the JSON approach is powerful, it comes with performance trade-offs, especially for larger objects or frequent comparisons: 1. **Serialization Overhead**: - Serializing and deserializing objects involve significant overhead compared to reference-based comparisons. For large and complex data structures, this could lead to performance bottlenecks. 2. **Frequency of Operation**: - If used excessively in performance-critical sections of your application, the cumulative impact might be noticeable. However, for infrequent or isolated checks, the performance impact might be negligible. ```javascript const largeObject1 = { /* a large complex structure */ }; const largeObject2 = { /* a similarly large complex structure */ }; // Comparing using reference console.time('Reference Comparison'); console.log(largeObject1 === largeObject2); console.timeEnd('Reference Comparison'); // Comparing using JSON console.time('JSON Comparison'); console.log(JSON.stringify(largeObject1) === JSON.stringify(largeObject2)); console.timeEnd('JSON Comparison'); ``` In most cases, the reference comparison will be significantly faster. ### Conclusion No one-size-fits-all solution exists in software development. Understanding the trade-offs and careful application of these techniques will greatly enhance your ability to manage and optimize equality checks in JavaScript. This method of using `JSON.stringify` and `JSON.parse` for object comparison, especially in React, guarantees accurate value-based comparisons, making your components more reliable and efficient. Until next time, happy coding!

baliachbryan

How to Expand Ubuntu Drive

When you are using vmware to create Ubuntu Server VM, it will only use half of the assigned hard...

https://dev.to/mss/how-to-expand-ubuntu-drive-3l6o

When you are using vmware to create Ubuntu Server VM, it will only use half of the assigned hard drive storage if you are not changing it in the installation process. Here is how to resize it. ```sh root@util:~# vgdisplay <snip> root@util:~# lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv <snip> root@util:~# resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv <snip> ``` This method still works in Ubuntu 24.04 as of today (2024-07-04) Reference: - https://askubuntu.com/questions/1269493/how-to-make-lv-use-all-disk-space-in-pv

mss

Introduction to CI/CD: A Beginner's Guide

In the world of software development, delivering high-quality software quickly and efficiently is...

https://dev.to/mahendraputra21/introduction-to-cicd-a-beginners-guide-1a4n

cicd, devops

In the world of software development, delivering high-quality software quickly and efficiently is crucial. This is where Continuous Integration (CI) and Continuous Delivery/Deployment (CD) come into play. CI/CD automates the process of software integration and delivery, making it easier to build, test, and release software faster. Let's dive into what CI/CD is and how it can benefit your projects. ---  Continuous Integration is a practice where developers frequently merge their code changes into a central repository. Each merge triggers an automated build and testing process. The goal of CI is to identify and fix integration issues as early as possible. Here’s how it works: 1. **Code Integration:** Developers commit their code changes to a shared repository multiple times a day. 2. **Automated Build:** Each commit triggers an automated build process to compile the code. 3. **Automated Tests:** After the build, automated tests run to ensure the new code doesn’t break existing functionality. 4. **Feedback:** If the build or tests fail, developers receive immediate feedback to fix the issues quickly. By integrating code frequently, teams can detect and address problems early, reducing the risk of last-minute integration issues. ---  ## What is Continuous Delivery (CD)? Continuous Delivery is an extension of CI that automates the release process. With Continuous Delivery, code changes are automatically prepared for a release to production. Here’s how it works: 1. **Deployment Pipeline:** After successful integration, the code goes through a deployment pipeline with various stages such as additional automated tests, performance tests, and security checks. 2. **Manual Approval:** Once the code passes all stages, it’s ready for deployment. A manual approval step can be included to decide when to release the code to production. Continuous Delivery ensures that your code is always in a deployable state, making it possible to release new features and bug fixes quickly and reliably. --- ## What is Continuous Deployment? Continuous Deployment takes Continuous Delivery a step further by automating the entire release process. Every change that passes all stages of the deployment pipeline is automatically deployed to production without manual intervention. This allows for a rapid release cycle and ensures that new features and fixes are delivered to users as soon as they are ready. --- ## Benefits of CI/CD Implementing CI/CD offers several benefits: 1. **Faster Releases:** Automating the integration and delivery process speeds up the release cycle, allowing you to deliver new features and fixes more frequently. 2. **Improved Quality:** Automated testing ensures that code changes are thoroughly tested, reducing the risk of bugs and issues in production. 3. **Early Problem Detection:** Frequent integration helps identify and fix issues early in the development process, reducing the cost and effort of fixing problems later. 4. **Reduced Manual Work:** Automation reduces the need for manual intervention, freeing up developers to focus on writing code and adding value to the project. 5. **Increased Collaboration:** CI/CD encourages collaboration among team members by providing immediate feedback and promoting shared responsibility for the codebase. --- ## Getting Started with CI/CD To get started with CI/CD, you’ll need a few key components: 1. **Version Control System (VCS):** A VCS like Git to manage your codebase. 2. **CI/CD Tools:** Tools like Jenkins, GitLab CI, CircleCI, or GitHub Actions to automate the build, test, and deployment process. 3. **Automated Tests:** A suite of automated tests to ensure code quality and functionality. 4. **Deployment Environment:** A staging or production environment where your code can be deployed. --- ## Conclusion CI/CD is a powerful practice that can significantly improved your software development process. By automating the integration, testing, and deployment of code changes, you can deliver high-quality software faster and more reliably. Whether you’re working on a small project or a large enterprise application, implementing CI/CD can help you stay competitive and meet the demands of modern software development.

mahendraputra21

Detailed Explanation of New Features of Strategy Interface Parameters and Interactive Controls

When developing strategies on the FMZ Quant Trading Platform, it is necessary to design strategy...

https://dev.to/fmzquant/detailed-explanation-of-new-features-of-strategy-interface-parameters-and-interactive-controls-1e81

comtrols, fmzquant, interface, parameters

When developing strategies on the FMZ Quant Trading Platform, it is necessary to design strategy parameters and strategy interactions. The FMZ Quant Trading Platform is committed to providing easy-to-use and powerful quantitative trading tools, and continuously iterating product design and functions. By upgrading "strategy parameters" and "interactive controls", the design flexibility of parameters and interactions in strategy design has been further increased. The functions of strategy parameters and interactive controls have been enhanced, making some design requirements easier to achieve. In this article, let's re-understand two essential contents in strategy design: "strategy parameter design" and "strategy interaction design". ## Strategy interface parameters The types of strategy parameters in FMZ Quant have not increased, and they are still the five types of parameters we are familiar with: - Numeric parameters - String parameters - Boolean parameters - Drop-down box parameters - Encrypted string parameters Then you will definitely ask me, what content has been added and optimized in this platform update? This upgradation adds "component configuration" for parameter binding controls, simplifies the "grouping" and "parameter dependency" functions, and integrates these two functions into "component configuration". For the default value of the parameter, an "optional"/"required" option is added to determine whether the strategy has the conditions to run. If the parameter is set to "required" but no specific parameters are written in the parameter control when the strategy is executed, the strategy cannot run at this time. Now that we have a general understanding of the upgrade changes, let's test it in detail. ### 1. Numeric parameters  We briefly talked about the "optional"/"required" functions before, so I won't go into details here. The following mainly explains "component configuration", which can be simply understood as: > Set various properties, types, and rules of the control that the parameter corresponds to (is bound to). The default control bound to the numeric parameter (number type) is the input box. You can set the rules for the data received by the input box, that is, use the "minimum value" and "maximum value" controls in the figure to set. In addition to the default input box control, the platform has added: - Time Selector In "Component Type", select "Time Selector", and the input box control on the strategy interface corresponding to the current parameter will become a time selection control. When setting this parameter, select a specific time, and the variable value of this parameter is the timestamp corresponding to the set time. Such controls are usually used for time range settings, start and end date settings. This is very convenient and intuitive. Using the date control can let the strategy know the corresponding timestamp, and there is no need to write complex time conversion code. The variable value of the interface parameter is: value (representing the timestamp) - Sliding Input Bar If set as a sliding input bar control, you must specify the "Minimum Value" and "Maximum Value" to determine the range of the slider. The step size refers to the value of the interval on the slider. The sliding input bar can implement a parameter for controlling the stop loss and take profit levels conveniently. Of course, there may be more other designs, which will not be repeated here. The variable value of the interface parameter is: value (representing the position information of the slider on the slider) ### 2. Boolean parameters  Boolean parameters are special in that they only have one corresponding control, which is the default switch control. And the parameter default value is also required. > Because Boolean values ​​are either true or false, they are binary options. Therefore, it is very appropriate to use a switch control to correspond to this parameter type. Generally, Boolean type parameters are used to control whether certain strategy functions are enabled on the platform. ### 3. String parameters  In addition to the default input box control, the platform has added: - Text In "Component Type", set to: Text. The input box control on the strategy interface corresponding to the current parameter will be changed to a larger text box. The difference between the text control and the ordinary input box control is that the text entered in the text box can wrap, and the text box can adjust the control size. The variable value of the interface parameter is: string. - Time Selector In "Component Type", select "Time Selector". The input box control on the strategy interface corresponding to the current parameter will become a control for setting time and date. "Time Selector for Component Type of String Parameter" is different from "Time Selector for Component Type of Numeric Parameter". The time selection of string type parameter has an additional "Time Format" option, which can set the selection format of the control: 1. Date: When "Time Format" is set to "Date", the control is a complete time selection control for selecting year, month, day, hour, minute, and second, and supports one-click selection of the current time. 2. Time: When "Time Format" is set to "Time", the control is a time selection control for selecting minute, hour, and second. 3. Year and Month: When "Time Format" is set to "Year and Month", the control is a time selection control for selecting year and month. 4. Year: When "Time Format" is set to "Year", the control is a time selection control for selecting year. The variable value of the interface parameter is: string (formatted as the corresponding time). - Color Selector In "Component Type", select "Color Selector". The input box control on the strategy interface corresponding to the current parameter will become a color selection control. It is generally used to design parameters for setting colors. The variable value of the interface parameter is: string (the color value corresponding to the selected color, for example: #7e1717). ### 4. Drop-Down Box Parameters  The default corresponding control of the drop-down box parameter is a drop-down box, but this time a lot of upgrades have been made to the previous simple single-select drop-down box: - Support Multiple Selections You can select multiple options at the same time in the drop-down box control corresponding to the drop-down box parameter. At this time, the variable value of the drop-down box parameter is no longer the selected option index, but an array. The array contains the indexes or bound data of all selected options. - Support Custom Default Values When this option is turned on, you can customize the default values ​​instead of having to select an option from the drop-down box as the default value. - Added the function of binding numeric values ​​and strings to drop-down box options. Bind a string or a numeric value to an option. When setting this parameter, the value of the drop-down box variable is no longer the index of the selected option, but the string or numeric value bound to the selected option. In addition to the default drop-down box control, this time the platform adds: - Segment Controller In "Component type", select "Segment controller". The control bound to the current parameter becomes a selectable segment slider, and you can select a specific segment block. Generally, it can be designed as follows: Usually used to switch between several mutually exclusive options, often used to filter content by category or tag, and choose between different operation modes. The variable value of the interface parameter is: the index of the selected part of the segment controller or the data bound to the selected part (the bound data supports numeric values ​​and strings). ### 5. Encrypted String Parameters  The encrypted string parameter is also quite special, and it has only one corresponding control, which is the default encrypted input box control. On the platform, encrypted string type controls are generally used to set sensitive information, such as secret keys, passwords, etc. These input parameter values ​​will be encrypted locally before transmission. The variable value of the interface parameter is: string. For all the above types of strategy interface parameters, this upgrade integrates the previous "parameter grouping" and "parameter dependency" functions into "component configuration". There are "grouping" and "filter" settings in the component configuration of all interface parameters. - Grouping You can enter the label you want directly to group in the group drop-down box control, and use the Enter key to confirm the group input. The system will record the currently entered label in the grouping option. Then you can specify a group for the current interface parameters. After grouping, on the strategy backtesting/live trading interface, the parameters marked as a group will be displayed in a grouping area. - Filter Enter some expressions in the filter control to determine whether the current parameter needs to be activated and displayed. This function can realize that the current parameter depends on a certain parameter setting to choose to display or hide. Filter expression example: ``` Filter format: a>b , a==1 , a , !a , a>=1&&a<=10 , a>b ``` Here, both a and b represent variables of strategy interface parameters. ## Interface Parameter Testing Strategy If the above explanations are a bit unintuitive, the best way to understand them is to actually use and test these parameter functions: Take JavaScript language strategy as an example: ``` function main() { Log("---------------------------Start testing numeric type parameters---------------------------") Log("Variable pNum1:", pNum1, ", Variable value type:", typeof(pNum1)) Log("Variable pNum2:", pNum2, ", Variable value type:", typeof(pNum2)) Log("Variable pNum3:", pNum3, ", Variable value type:", typeof(pNum3)) Log("Variable pNum4:", pNum4, ", Variable value type:", typeof(pNum4)) Log("---------------------------Start testing Boolean type parameters---------------------------") Log("Variable pBool1:", pBool1, ", Variable value type:", typeof(pBool1)) Log("Variable pBool2:", pBool2, ", Variable value type:", typeof(pBool2)) Log("---------------------------Start testing string type parameters---------------------------") Log("Variable pStr1:", pStr1, ", Variable value type:", typeof(pStr1)) Log("Variable pStr2:", pStr2, ", Variable value type:", typeof(pStr2)) Log("Variable pStr3:", pStr3, ", Variable value type:", typeof(pStr3)) Log("Variable pStr4:", pStr4, ", Variable value type:", typeof(pStr4)) Log("---------------------------Start testing the drop-down box type parameters---------------------------") Log("Variable pCombox1:", pCombox1, ", Variable value type:", typeof(pCombox1)) Log("Variable pCombox2:", pCombox2, ", Variable value type:", typeof(pCombox2)) Log("Variable pCombox3:", pCombox3, ", Variable value type:", typeof(pCombox3)) Log("---------------------------Start testing encryption string type parameters---------------------------") Log("Variable pSecretStr1:", pSecretStr1, ", Variable value type:", typeof(pSecretStr1)) } ```  Complete parameter testing strategy: https://www.fmz.com/strategy/455212 There is a parameter dependency design hidden in the above parameters. Many strategies have the requirement to enable a series of settings based on a certain parameter, which can be achieved with parameter dependencies like this. ## Interactive Controls The FMZ Quant Trading Platform also has five types of strategy interactive controls, which have been optimized and upgraded this time. "Component Configuration" has been added to simplify the grouping function. ### 1. Number Interactive Controls  The interactive controls are basically the same as the "component configuration" of the strategy interface parameters. In addition to the default input box controls, the component types also support: - Time Selector The interactive command sent contains the timestamp of the selected time. - Slider Input Bar The interactive command sent contains the value represented by the selected slider position. The usage is the same as that of various component types of strategy interface parameters, so it will not be repeated here. ### 2. Boolean (true/false) Interactive Controls  The interactive controls are basically the same as the "component configuration" of the strategy interface parameters. ### 3. String Interactive Controls  In addition to the default input box control, the component type also supports: - Text The interactive command sent contains the content entered in the text box. - Time selector The interactive command sent contains a time string of the selected time, with multiple formats to choose from. - Color Picker The interactive command sent contains a color value string for the selected color. ### 4. Drop-Down Box (selected) Interactive Control  The drop-down box of the interactive control has also been upgraded: "support multiple selections", "custom default values", option binding to specific data, etc. In addition to the default drop-down box component, the following are added: - Segment Controller The interactive command sent contains the index or bound data of the selected slider. ### 5. Button Interactive Control  The button type interactive control does not have any input items. When triggered, the interactive command sent contains only the button control name. ## Interactive Control Testing Strategy The best way to understand it is to test it manually. A testing strategy is also prepared here. It should be noted that interactive controls cannot be tested in the backtesting system, and only live testing can be created. ``` function main() { var lastCmd = "" while (true) { var cmd = GetCommand() // Receive messages generated by interactive controls if (cmd) { Log(cmd) lastCmd = cmd } LogStatus(_D(), lastCmd) Sleep(500) } } ``` Enter some random information, set some options, and then click the interactive control button to generate interactive messages. The strategy captures the messages and prints them out.   Completed interactive control testing strategy: https://www.fmz.com/strategy/455231 From: https://www.fmz.com/bbs-topic/10455

fmzquant

Welcome to Anime Heaven!

Are you also deep into the magic of anime? Have you been searching around to find your favourite...

https://dev.to/florence_xu_2c9cfbe0a2cf5/welcome-to-anime-heaven-5bci

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How to Check and Improve My Website for More Organic Traffic?

Increasing organic traffic is something many website owners aim for. To make this happen, it's...

https://dev.to/juddiy/how-to-check-and-improve-my-website-for-more-organic-traffic-2gdc

website, seo, learning

Increasing organic traffic is something many website owners aim for. To make this happen, it's important to take a good look at your current website and make some improvements. Here are some key steps and strategies to help boost your website's organic traffic: #### 1. Conduct a Comprehensive SEO Audit Performing an SEO audit is the first step to understanding your website's current status. This involves checking: - **Technical SEO**: Including website speed, mobile optimization, HTTPS security, XML sitemap, etc. - **Content**: Ensure your pages contain high-quality and relevant content, effectively using keywords. - **Backlinks**: Analyze the quantity and quality of external links. - **User Experience**: Evaluate website usability and navigation structure. Tools like [SEO AI](https://seoai.run/), Screaming Frog or SEMrush can expedite this process and identify areas needing improvement. #### 2. Optimize Content Strategy High-quality content is key to attracting and retaining organic traffic. Consider the following content strategies: - **Create Valuable Content**: Write in-depth and useful content tailored to your target audience. - **Regular Content Updates**: Maintain freshness by regularly publishing blog posts or updating existing content. - **Diversify Content Formats**: Include videos, infographics, case studies, and long-form articles to appeal to different audiences. Ensure keywords are naturally integrated into content without over-optimization. #### 3. Improve Page Loading Speed Page loading speed is critical for both user experience and SEO. Enhance speed through: - **Image Compression**: Use tools like TinyPNG to compress large images. - **Enable Browser Caching**: Reduce load times, especially for repeat visitors. - **Optimize Code**: Remove unnecessary CSS and JavaScript, streamline code structure. Google PageSpeed Insights is a helpful tool for identifying and resolving page speed issues. #### 4. Ensure Mobile-Friendliness With increasing mobile device users, ensuring your site performs well on mobile is crucial. Optimize by: - **Responsive Design**: Ensure your site automatically adjusts layout for different screen sizes. - **Simplify Navigation**: Clean, concise navigation enhances mobile user experience. - **Optimize Mobile Loading Speed**: Given slower mobile networks, speed optimization is paramount. Google’s Mobile-Friendly Test tool can help assess your site’s mobile performance. #### 5. Local SEO Optimization For local businesses, optimizing for local SEO can attract nearby customers. Take these steps: - **Optimize Google My Business**: Ensure accurate and complete business information, encourage positive reviews. - **Localize Content**: Include local keywords in your content to better match local search queries. - **Build Local Links**: Collaborate with local businesses and organizations to acquire relevant local backlinks. #### 6. Enhance User Experience (UX) User experience is crucial for maintaining and increasing organic traffic. Consider these UX improvements: - **Simplify Navigation**: Make it easy for users to find what they need. - **Improve Readability**: Use readable fonts and appropriate line spacing. - **Minimize Distractions**: Avoid excessive pop-ups and ads that distract from user experience. #### 7. Utilize Analytics Tools Regularly use tools like Google Analytics and Google Search Console to monitor and analyze your site’s performance. With these tools, you can: - **Track Traffic Sources**: Understand which channels drive the most traffic. - **Analyze User Behavior**: View user patterns on your site, such as bounce rates and session duration. - **Monitor Keyword Rankings**: Assess which keywords bring the most organic traffic. #### 8. Regular Updates and Maintenance Websites require ongoing updates and maintenance to ensure performance and relevance. Regularly check and address: - **Broken Links**: Fix or replace any broken internal and external links. - **Outdated Content**: Update obsolete information or data to maintain accuracy and relevance. - **Security Issues**: Ensure your site is free from security vulnerabilities and employs the latest security measures. ### Conclusion By systematically assessing and optimizing your website, you can significantly increase organic traffic. SEO and website optimization are continuous processes that require ongoing monitoring and adjustment. Stay informed about the latest SEO trends and algorithm updates to keep your site in top shape.

juddiy

Top Features of Outdoor Awning Fabric by Suzhou Ruihe Textile Technology Co., Ltd

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design

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Nanyang JZJ Testing Equipment Co., Ltd: A Leader in Testing Solutions

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design

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Gerenciamento de Estado com Context API vs Redux

Introdução O gerenciamento de estado é um aspecto crucial no desenvolvimento de aplicações...

https://dev.to/vitorrios1001/gerenciamento-de-estado-com-context-api-vs-redux-16f7

react, redux, typescript, javascript

#### Introdução O gerenciamento de estado é um aspecto crucial no desenvolvimento de aplicações React. Existem diversas abordagens para gerenciar o estado global, sendo a Context API e o Redux duas das mais populares. Neste artigo, vamos explorar as diferenças entre elas, os casos de uso e como implementar cada uma, para ajudar você a decidir qual é a melhor para o seu projeto. #### Context API A Context API é uma solução nativa do React para passar dados de forma eficiente através da árvore de componentes sem a necessidade de passar props manualmente em cada nível. ##### Quando Usar a Context API - **Estado Simples**: Ideal para estados globais simples que não exigem lógica complexa. - **Aplicações Pequenas**: Funciona bem em aplicações pequenas e médias. - **Evitar Biblioteca Externa**: Se você prefere não adicionar dependências externas ao seu projeto. ##### Implementação da Context API Vamos criar um exemplo simples para gerenciar o estado de autenticação de um usuário. **1. 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( <> <p>Welcome, {user.name}!</p> <button onClick={logout}>Logout</button> </> ) : ( <p>Please log in.</p> )} </div> ); }; const App = () => { const { login } = useAuth(); return ( <div> <button onClick={() => login({ name: 'John Doe' })}>Login</button> <UserProfile /> </div> ); }; export default App; ``` #### Redux Redux é uma biblioteca de gerenciamento de estado previsível para aplicações JavaScript. É amplamente utilizado em aplicações React para gerenciar estados complexos. ##### Quando Usar o Redux - **Estado Complexo**: Ideal para estados globais complexos e interdependentes. - **Escalabilidade**: Funciona bem em grandes aplicações que precisam de um gerenciamento de estado robusto. - **DevTools**: Oferece suporte a ferramentas de desenvolvimento, facilitando a depuração e rastreamento do estado. ##### Implementação do Redux Vamos criar um exemplo simples para gerenciar o estado de autenticação de um usuário usando Redux. **1. Instalando Dependências** ```bash npm install redux react-redux ``` **2. Configurando o Redux Store** ```jsx import { createStore } from 'redux'; import { Provider, useDispatch, useSelector } from 'react-redux'; // Ação const LOGIN = 'LOGIN'; const LOGOUT = 'LOGOUT'; const login = (user) => ({ type: LOGIN, payload: user }); const logout = () => ({ type: LOGOUT }); // Redutor const authReducer = (state = { user: null }, action) => { switch (action.type) { case LOGIN: return { ...state, user: action.payload }; case LOGOUT: return { ...state, user: null }; default: return state; } }; // Store const store = createStore(authReducer); export { login, logout, store }; ``` **3. Usando Redux em Componentes** ```jsx import React from 'react'; import { Provider, useDispatch, useSelector } from 'react-redux'; import { login, logout, store } from './store'; const UserProfile = () => { const user = useSelector((state) => state.user); const dispatch = useDispatch(); return ( <div> {user ? ( <> <p>Welcome, {user.name}!</p> <button onClick={() => dispatch(logout())}>Logout</button> </> ) : ( <p>Please log in.</p> )} </div> ); }; const App = () => { const dispatch = useDispatch(); return ( <div> <button onClick={() => dispatch(login({ name: 'John Doe' }))}>Login</button> <UserProfile /> </div> ); }; const Root = () => ( <Provider store={store}> <App /> </Provider> ); export default Root; ``` #### Comparação entre Context API e Redux **Complexidade**: - **Context API**: Simples e fácil de configurar para estados simples. - **Redux**: Pode ser complexo devido à configuração inicial, mas oferece mais funcionalidades para estados complexos. **Escalabilidade**: - **Context API**: Adequado para aplicações menores e estados simples. - **Redux**: Melhor para grandes aplicações com estados interdependentes. **Ferramentas de Desenvolvimento**: - **Context API**: Sem suporte nativo para DevTools. - **Redux**: Suporte robusto para DevTools, facilitando a depuração. **Boas Práticas**: - Use Context API para estados globais simples e localizados. - Use Redux para estados globais complexos e interdependentes que exigem um gerenciamento robusto e escalável. #### Conclusão Tanto a Context API quanto o Redux têm seus próprios méritos e são adequados para diferentes tipos de aplicações. A escolha entre eles depende da complexidade do estado da sua aplicação e dos requisitos de escalabilidade. A Context API é excelente para estados simples e localizados, enquanto o Redux é ideal para estados complexos em grandes aplicações. Espero que este artigo tenha ajudado você a entender melhor as diferenças entre a Context API e o Redux, e quando usar cada um deles. Se tiver alguma dúvida ou sugestão, sinta-se à vontade para comentar!

vitorrios1001

Logistics Packaging Essentials: Key Components for Safe Transit

Logistics Packaging Basics for Damage-Free Shipment You ever take a moment and think about how that...

https://dev.to/ezequiel_pittmanz_a2f2b3a/logistics-packaging-essentials-key-components-for-safe-transit-32kg

design

Logistics Packaging Basics for Damage-Free Shipment You ever take a moment and think about how that thing you ordered on the internet got from point A to your front door? Thank the wonderful land of logistics packaging for this. It is a painstaking operation in which goods are packed, stored and moved from the point of production to that of distribution. This article will help you understand more about the key elements related to logistics packaging: what it is and how this system works so that your packages reach their final destination both safely. Benefits Of Logistics Packaging Logistics packaging in the world comes with plenty of benefits for both recipient and sender. It is the first line of defense for shipped package contents. When you are dealing with shipping goods from one place to another, there is a certain risk of exposure that electrical tape items may have to vibrations or moisture in transit. Logistics packaging is a protector, providing shelter for the goods within against these risks and assisting in delivering your products safely to their destination. Logistics packaging, secondly is a low-cost outcome. Extremely well design for minimal damage to goods which could have otherwise cost a return and reshipping fee. In addition, the choice of packaging with lightweight but durable materials is a plus because not only can protect goods are right kept safety but also carry good costs down. New Light on Logistics Packaging Innovation In recent years, there have been creative improvements in the logistic packaging sector. This includes a range of new types of packaging materials that are designed to make sure products do not get damaged when being shipped. This is in line with the increasing sustainability movement that has seen more materials used be biodegradable and sustainable. One of the significant innovations to highlight here is smart packaging. The innovative packaging contains sensors and monitoring devices within its construction. These sensors identify alterations in temperature, humidity and pressure etc. 4- Tokenomics: So before we move on, let us first discuss what token economics are? Logistics Packaging Safety SAFETY OF GOODS DURING TRANSIT IS THE TOP MOST PRIORITY IN LOGISTICS PACKAGING The packaging materials must be strong enough to withstand the rigors of shipping yet allow for easy placement and maneuvering, as well. Moreover, proper labeling needs to be on point as well with details about weight, what is inside the box and any specific handling procedures. This makes certain that everyone in the shipping process has detailed information about what is included within their masking tape package as well how they need to safely handle them. Things to know about Logistics Packaging The use of logistic packaging is a relatively simple process; it plays an important role in securing the good delivery. The first step is to choose the right material for packaging, with items measured by size and weight (including the fragile nature). Choosing eco-friendly packaging materials is just as crucial. Then, the items should be cautiously wrapped using protective supplies such as bubble wrap, peanuts or foam to avoid getting damaged. After which the package shall be properly labeled with anything of the following to aid in an efficient transit process. Service and Quality It is important that when you choose other packaging and logistics companies, services should also be the same material The company has a goodwill which is on time delivery of packages and in very good packing material. Admittedly, high-quality service is everything but pricing also plays an important role during your decision making. Logistics Packaging Applications Logistics packaging is very simple to accommodate and for this reason it can be used any number of industries, particularly in retail, manufacturing, food processing and healthcare. Logistics packaging is critical to equip the retail sector for shipping products from warehouses to Stores. It also helps in moving raw insulating tape materials and finished goods to customers, especially useful in the manufacturing varsities. In food, logistics packaging is used to make sure perishable goods such as vegetables and fruits meat should easily be flown one country another countries. Also in the healthcare industry, it is vital for carrying medical and pharmaceutical supplies as well. To sum up, logistics packaging is an essential part of safe and effective transit operations. It ensures the protection of goods during shipping, saves time and money, is applicable across a variety of industries; thus making it indispensable in present logistics compliance.

ezequiel_pittmanz_a2f2b3a

Leveraging Regular Service Role for Secured Alibaba Cloud Elasticsearch Integrations

Introduction If you want to upload a plug-in or dictionary file stored in Object Storage...

https://dev.to/a_lucas/leveraging-regular-service-role-for-secured-alibaba-cloud-elasticsearch-integrations-3fhn

## Introduction If you want to upload a plug-in or dictionary file stored in Object Storage Service (OSS) via the Elasticsearch console, you can use the OSS URL for this process. This requires a regular service role for Alibaba Cloud Elasticsearch, authorizing Elasticsearch to access and load the file from the OSS URL without altering permissions on the OSS bucket. <a name="uqlNM"></a> ## Overview of Regular Service Role <a name="dLRRj"></a> ### What is a Regular Service Role? A regular service role is a RAM role whose trusted entity is an Alibaba Cloud service. These roles facilitate authorized access across different Alibaba Cloud services. For more details, refer to the [RAM role overview](https://www.alibabacloud.com/help/doc-detail/122329.htm). <a name="ShrPf"></a> ### Creating and Using the Regular Service Role If the regular service role does not exist when uploading a dictionary via the OSS URL, you need to create the role and attach the required policy. This way, Elasticsearch can assume the role to access the file, ensuring higher data security than making the OSS bucket publicly readable. <a name="bckM0"></a> ### Role Details - **Trusted Service Name**: elasticsearch.aliyuncs.com - **Role Name**: AliyunElasticsearchAccessingOSSRole - **Policy Name**: AliyunElasticsearchAccessingOSSRolePolicy - **Policy Document**: ```json { "Version": "1", "Statement": [ { "Action": [ "oss:GetObject", "oss:GetObjectMetadata", "oss:GetObjectMeta" ], "Resource": "*", "Effect": "Allow" } ] } ``` <a name="deleting-the-regular-service-role"></a> ## Deleting the Regular Service Role You can delete the regular service role in the RAM console. However, note that deleting this role will disable features dependent on it. For more information, see [Delete a RAM role](https://www.alibabacloud.com/help/doc-detail/93707.htm). <a name="limiting-permissions-of-the-regular-service-role"></a> ## Limiting Permissions of the Regular Service Role To define finer-grained permissions, create a custom RAM policy and attach it to the role. <a name="adding-a-tag-to-a-bucket"></a> ### Adding a Tag to a Bucket Tags can be used to manage bucket permissions. Here’s how to add a tag to a bucket: 1）Log on to the OSS console. 2）Navigate to **Buckets** > **Bucket Settings** > **Bucket Tagging**. 3）Click **Create Tag** and add the desired tag. <a name="creating-a-custom-ram-policy"></a> ### Creating a Custom RAM Policy Create a custom policy that specifies the bucket or the tag in the condition. Example: ``` { "Version": "1", "Statement": [ { "Action": [ "oss:GetObject", "oss:GetObjectMetadata", "oss:GetObjectMeta" ], "Resource": [ "acs:oss:*:193248xxxxxxx:*" ], "Effect": "Allow", "Condition": { "StringEquals": { "oss:BucketTag/key1":"value1" } } } ] } ``` Attach this custom policy to the AliyunElasticsearchAccessingOSSRole role. <a name="faq"></a> ## FAQ <a name="5f56529c"></a> ### Why is the ElasticsearchNoPermissionForCurrentBucket error returned? For Elasticsearch clusters deployed in the cloud-native control architecture (e.g., versions V7.16, V8.5, or V8.9), only the regular service role enables the clusters to read dictionary files stored in OSS. Ensure complete authorization on the authorization page. This role is required for: - OSS-based synonym dictionary updates - Standard and rolling updates of IK dictionaries - Dictionary updates for the analysis-aliws plugin <a name="conclusion"></a> ## Conclusion Implementing a regular service role in [Alibaba Cloud Elasticsearch](https://www.alibabacloud.com/en/product/elasticsearch) ensures secure and efficient access to OSS resources. Ready to start your journey with Elasticsearch on Alibaba Cloud? Explore our tailored Cloud solutions and services to transform your data into a visual masterpiece.<br />[Click here to embark on Your 30-Day Free Trial](https://c.tb.cn/F3.bTfFpS)

a_lucas

How To Create Users and Groups from a File Using Bash Script

This article explains how to create users and assign them groups and passwords from a given text...

https://dev.to/toluwalemi/how-to-automate-user-creation-with-bash-script-3kkk

ubuntu, bash, linux, devops

This article explains how to create users and assign them groups and passwords from a given text file. ## Contents - [Objectives](#objectives) - [Project Setup](#project-setup) - [Bash Script](#bash-script) - [Test](#test) ## Objectives By the end of this tutorial, you will be able to: 1. Create users with a bash script 2. Create groups for these users 3. Assign users to groups 4. Generate and set passwords for users 5. Log actions and manage permissions for security ## Project Setup 1. Create a `.sh` file named `create_users.sh`. ```bash touch create_users.sh ``` 2. Create a text file named `sample.txt` with user and group data. ```bash touch sample.txt ``` ## Bash Script To get started, we first need to declare that this is a bash script using: ```bash #!/bin/bash ``` This line tells the system to use the bash shell to interpret the script. Next, we define our log file path and the password file path. This ensures we have paths to store logs and passwords securely: ```bash # Define the log file and password file paths LOGFILE="/var/log/user_management.log" PASSWORD_FILE="/var/secure/user_passwords.csv" ``` The next step ensures the script is run with root permissions. If you don't have the right permissions, the script will exit and inform you: ```bash # Ensure the script is run with root permissions if [[ $EUID -ne 0 ]]; then echo "This script must be run as root or with sudo" exit 1 fi ``` Here, `[[ $EUID -ne 0 ]]` checks if the effective user ID is not zero (i.e., not root). The _effective user ID (EUID)_ represents the user identity the operating system uses to decide if you have permission to perform certain actions. If the `EUID` is not zero, it means you're not running the script as the root user, and the script will print a message and exit with status 1. We then define a function to log actions: ```bash # Function to log actions log_action() { local message="$1" echo "$message" | tee -a "$LOGFILE" } ``` This function takes a message as an argument and appends it to the log file, also displaying it on the terminal. Let us create another function that will help us check if a group already exists. ```bash does_group_exists() { local group_name=$1 if getent group "$group_name" > /dev/null 2>&1; then return 0 else return 1 fi } ``` If the function returns a 0 then it means that the group exists. If it returns 1, then it means that it does not exist. Next, we check if the log file exists, create it if it doesn't, and set the correct permissions: ```bash # Check if the log file exists, create it if it doesn't, and set the correct permissions if [[ ! -f "$LOGFILE" ]]; then touch "$LOGFILE" log_action "Created log file: $LOGFILE" else log_action "Log file already exists, skipping creation of logfile ' $LOGFILE ' " fi ``` Here, `[[ ! -f "$LOGFILE" ]]` checks if the log file does not exist. If true, it creates the file and logs the action. We repeat a similar process for the password file: ```bash # Check if the password file exists, create it if it doesn't, and set the correct permissions if [[ ! -f "$PASSWORD_FILE" ]]; then mkdir -p SECURE_DIR touch "$PASSWORD_FILE" log_action "Created password file: $PASSWORD_FILE" chmod 600 "$PASSWORD_FILE" log_action "Password file permissions set to 600: $PASSWORD_FILE" else log_action "Password file already exists, skipping creation of password file: $PASSWORD_FILE" fi ``` This ensures the password file is created if it doesn't exist and sets the correct permissions for security. Next, we define a function to generate random passwords: ```bash # Function to generate random passwords generate_password() { local password_length=12 tr -dc A-Za-z0-9 </dev/urandom | head -c $password_length } ``` The `local` keyword is used to define a variable that is local to the function. This means that the variable `password_length` is only accessible with the `generate_passsword` function, preventing it from interfering with other parts of the script. Let's break down what `tr -dc A-Za-z0-9 </dev/urandom | head -c $password_length` does, shall we? - `/dev/urandom`: This is a special file in Unix-like systems that provides random data. It's often used for generating cryptographic keys, passwords, or any other data requiring randomness. - `tr -dc A-Za-z0-9`: The `tr` command is used to translate or delete characters. Here: - `-d` tells `tr` to delete characters. - `-c` complements the set of characters, meaning it includes everything except the specified set. - `A-Za-z0-9` specifies the set of allowed characters: uppercase letters (A-Z), lowercase letters (a-z), and digits (0-9). - `</dev/urandom`: Redirects the random data from `/dev/urandom` into the `tr` command. - `| head -c $password_length`: The head command is used to output the first part of files. - `-c $password_length` specifies the number of characters to output, defined by the variable password_length (which is 12). This ensures the generated password is exactly 12 characters long. This function uses `tr` to generate a random string of 12 characters from `/dev/urandom`. We then define the `create_user_groups_from_file` function, which creates a user and assigns groups: ```bash create_user_groups_from_file() { local filename="$1" # Check if the file exists if [[ ! -f "$filename" ]]; then log_action "File not found: $filename" return 1 fi # Read the file line by line while IFS= read -r line; do # Remove whitespace and extract user and groups username=$(echo "$username" | xargs) groups=$(echo "$groups" | tr -d ' ') ``` - `[[ ! -f "$filename" ]]`: checks if the file exists. `-f`: This is a file test operator. It checks if the provided path (in this case, stored in the variable `$filename`) exists and is a regular file. - `while IFS= read -r line; do ... done < "$filename"`: reads the file line by line. - `username=$(echo "$username" | xargs)`: extracts the username from the file. `xargs` trims any leading or trailing whitespace and ensures that the result is treated as a single entity. - `groups=$(echo "$groups" | tr -d ' ')`: extracts the groups from the file. Now, let us add the logic to actually create the users and the groups. ```bash create_user_groups_from_file() { # ... previous code here # Check if the user already exists if ! id "$username" &>/dev/null; then # Create the user with a home directory useradd -m -s /bin/bash "$username" if [[ $? -ne 0 ]]; then echo "ERROR: Failed to create user $username." >> "$LOG_FILE" continue fi log_action "User $username created." # Generate a password and set it for the user password=$(generate_password) # and set password echo "$username:$password" | chpasswd echo "$username,$password" >> "$PASSWORD_FILE" log_action "Created user: $username" else log_action "User $username already exists, skipping creation" fi # Create a personal group for the user if it doesn't exist if ! does_group_exists "$username"; then groupadd "$username" log_action "Successfully created group: $username" usermod -aG "$username" "$username" log_action "User: $username added to Group: $username" else log_action "User: $username added to Group: $username" fi # Add the user to additional groups IFS=',' read -r -a group_lst <<< "$groups" for group in "${group_lst[@]}"; do if ! does_group_exists "$group"; then # Create the group if it does not exist groupadd "$group" log_action "Successfully created Group: $group" else log_action "Group: $group already exists" fi # Add the user to the group usermod -aG "$group" "$username" done # Set up home directory permissions chown -R "$username:$username" "/home/$username" chmod 700 "/home/$username" done < "$filename" } ``` - `if id "$username" &>/dev/null; then ...`: This checks if the user exists then redirects both the standard output (stdout) and standard error (stderr) to `/dev/null`. `/dev/null` is a special device file that discards any data written to it. - `useradd -m "$username"`: creates the user with a home directory. `-m` flag tells `useradd` to create a home directory for the user. - `groupadd "$username"`: creates a personal group for the user. - `usermod -aG "$username" "$username"`: adds the user to their personal group.`-a` flag stands for "append". It tells `usermod` to append the user to the specified group(s) without removing them from any other groups. On the other hand, `-G` flag specifies that the following argument (`"$username"`) is a list of supplementary groups which the user is also a member of. - `IFS=',' read -ra group_lst <<< "$groups"` splits additional groups by commas. Here the _Internal Field Separator_ (`IFS`) means the shell will split strings into parts based on commas. - `groupadd "$group"`: creates additional groups if they don't exist. - `chown -R "$username":"$username" `"/home/$username" sets the ownership of the home directory. `chown` stands for change owner and the command recursively changes ownership for all files and subdirectories within `/home/$username`. - `chmod 700 "/home/$username"` sets permissions of the home directory. `chmod` stands for change mode and it changes file permission to 700. 7 grants read, write and execute permissions to the owner. 0 denies all permissions to others. ## Test To test the code simply run the following command in your terminal: ```bash bash create_users.sh sample.txt ``` That's it! You can find the full code in my [repository](https://github.com/Toluwalemi/hng-devops-stage-one-task). Cheers! _[This article was written in completion of the [HNG Internship]( https://hng.tech/internship) stage one DevOps task. Learn more about the program [here](https://hng.tech/premium).]_

toluwalemi

Leveraging PySpark.Pandas for Efficient Data Pipelines

In the world of big data, Spark has become a pivotal tool for handling and processing large datasets...

https://dev.to/felipe_de_godoy/leveraging-pysparkpandas-for-efficient-data-pipelines-2opf

dataengineering, spark, pandas, python

In the world of big data, Spark has become a pivotal tool for handling and processing large datasets efficiently. However, if you're a data scientist or a data analyst accustomed to the simplicity and power of Pandas, you might find transitioning to Spark a bit daunting. That's where the Pandas API on Spark comes in! It brings the familiar Pandas syntax to the Spark ecosystem, allowing you to leverage the distributed computing power of Spark while working with a Pandas-like interface. ### Why Use Pandas API on Spark? The Pandas API on Spark allows you to: 1. **Handle Larger-Than-Memory Data**: Work with datasets that exceed the memory capacity of a single machine. 2. **Leverage Distributed Computing**: Benefit from the parallel processing power of a Spark cluster. 3. **Use Familiar Syntax**: Transition smoothly from Pandas to Spark without having to learn a completely new API. ### Setting Up Your Environment To get started, we'll use Docker to set up a local PySpark environment. Open your terminal and run the following command: ```sh docker run -it -p 8888:8888 jupyter/pyspark-notebook ``` Once the container is running, open your browser and navigate to the second link to access your PySpark environment.  ### Getting the Data We'll use a dataset from Kaggle for this example. You can find the dataset here: [Students Performance Dataset](https://www.kaggle.com/rabieelkharoua/students-performance-dataset). Download the CSV file and place it in the appropriate location within your Docker container (you can drag it to jupyter tab in your browser). ### Processing Data with Pandas API on Spark With the environment set up and the file in the correct place, you can run the following code to read, treat, visualize, and save the data to S3. **Step 1: Import Libraries and Initialize Spark Session** ```python !pip install boto3 plotly import pandas as pd import numpy as np import pyspark.pandas as ps from pyspark.sql import SparkSession import boto3 spark = SparkSession.builder.appName("PandasOnSparkExample").getOrCreate() ``` **Step 2: Read Data from CSV** ```python columns = ['StudentID', 'Age', 'Gender', 'Ethnicity', 'ParentalEducation', 'StudyTimeWeekly', 'Absences', 'Tutoring', 'ParentalSupport', 'Extracurricular', 'Sports', 'Music', 'Volunteering', 'GPA', 'GradeClass'] psdf = ps.read_csv('Student_performance_data _.csv', names=columns, header=0) ``` **Step 3: Exploring the Data** Check the first few rows of the dataset to ensure it's loaded correctly: ```python print(psdf.head()) ```  Print column names and data types: ```python print(psdf.columns) print(psdf.dtypes) ``` **Step 4: Handling Missing Data** Handle missing data by either dropping rows with missing values: ```python psdf_cleaned = psdf.dropna() print(psdf_cleaned.head()) ``` Or filling them with a specific value: ```python psdf_filled = psdf.fillna(value=0) print(psdf_filled.head()) ``` **Step 5: Data Manipulations and Insights** Group your data and apply aggregate functions: ```python grouped_psdf = psdf.groupby('Gender').mean() print(grouped_psdf) ```  Sort your DataFrame by values: ```python sorted_psdf = psdf.sort_values(by='GPA', ascending=False) print(sorted_psdf.head()) ``` **Step 6: Visualization** Plot the GPA distribution using plotly (it must be installed): ```python psdf['StudyTimeWeekly'].to_pandas().plot(kind='hist') ```  **Step 7: Save as Compressed Parquet and Upload to S3** Save the DataFrame as a compressed Parquet file: ```python parquet_file = 'student_data.parquet.gzip' psdf.to_parquet(parquet_file, compression='gzip') ``` Upload the Parquet file to S3 using `boto3`: ```python s3_bucket = 'your-s3-bucket-name' s3_key = 'path/to/save/student_data.parquet.gzip' # Initialize a session using Amazon S3 s3 = boto3.client('s3') # Upload the file to S3 s3.upload_file(parquet_file, s3_bucket, s3_key) print(f"File uploaded to s3://{s3_bucket}/{s3_key}") ``` ### Conclusion The Pandas API on Spark bridges the gap between Pandas and Spark, offering you the best of both worlds. Whether you're handling massive datasets or looking to scale your data processing pipelines effortlessly, this API empowers you to harness the full power of Spark with the simplicity of Pandas. Try it out and supercharge your data analytics workflow today! For more details, you can refer to [Spark's official documentation](https://spark.apache.org/docs/latest/api/python/getting_started/index.html). Happy data wrangling! Repo: https://github.com/felipe-de-godoy/spark_with_pandas

felipe_de_godoy

Realtime AI gemini nano using vercel ai sdk

linkedin

https://dev.to/kenangain/realtime-ai-gemini-nano-using-vercel-ai-sdk-1g15

chatgpt, vercel, aisdk, webdev

[linkedin](https://www.linkedin.com/posts/kenan-gain-33048518a_overpowerdai-artificialintelligence-machinelearning-activity-7213722148283011073--gdH?utm_source=share&utm_medium=member_desktop)

kenangain

Come and see China：Beijing，a city that blends ancient and modern beauty！

A post by pang Jack

https://dev.to/pang_jack/come-and-see-chinabeijinga-city-that-blends-ancient-and-modern-beauty-51bj

pang_jack

Solving Complex Backend Challenges: My Journey with Node.js and HNG Internship

As I embark on my journey with Node.js and prepare for the HNG Internship, I reflect on a recent...

https://dev.to/sunday_covenant/solving-complex-backend-challenges-my-journey-with-nodejs-and-hng-internship-2bak

As I embark on my journey with Node.js and prepare for the HNG Internship, I reflect on a recent challenging backend problem that pushed my limits and expanded my skills. The Challenge: Handling Concurrent User Requests Efficiently In developing a robust user management system for a client, the primary challenge was optimizing the backend to handle concurrent user requests seamlessly. With Node.js as my framework of choice, scalability and performance were critical concerns. Step-by-Step Solution Breakdown 1. Understanding the Problem Scope - Identified the need for efficient CRUD operations on user records stored in MongoDB. - Recognized potential bottlenecks in handling multiple simultaneous requests. 2. Designing the Solution Architecture - Implemented a microservices architecture using Node.js to modularize components. - Utilized Mongoose for MongoDB interactions, ensuring schema validation and ease of data manipulation. 3. Implementing Optimized Query Handling - Employed indexing and query optimization techniques within MongoDB to enhance read and write operations. - Leveraged caching mechanisms (Redis) for frequently accessed user data to reduce database load. 4. Ensuring Scalability and Resilience - Implemented load balancing using NGINX and clustering in Node.js to distribute incoming requests across multiple server instances. - Monitored system performance using tools like PM2 and New Relic to detect and mitigate performance issues in real-time. 5. Testing and Iteration - Conducted extensive unit testing with Mocha and Chai to validate each endpoint’s functionality. - Implemented stress testing using tools like Apache JMeter to simulate high traffic scenarios and fine-tune performance. Why HNG Internship? Joining the HNG Internship represents a pivotal opportunity for me to deepen my skills in backend development within a supportive community of tech enthusiasts. The internship's emphasis on practical learning through real-world projects aligns perfectly with my career aspirations. Navigating complex backend challenges has reinforced my passion for creating scalable, efficient solutions using Node.js. The journey ahead with HNG Internship promises to be a transformative experience, where I aim to contribute meaningfully while continuing to learn and grow. About Me: I am Covenant Sunday, a passionate backend developer specializing in Node.js, driven by a curiosity to solve intricate problems and deliver robust solutions. Follow my journey on https://www.linkedin.com/in/covenant-sunday-860812246 and connect with me! https://hng.tech/internship https://hng.tech/hire https://hng.tech/premium

sunday_covenant

The Ultimate React Roadmap for 2024 - Learn React the Right Way

React has become one of the most popular libraries for building user interfaces, and it's...

https://dev.to/docusignlog-in/the-ultimate-react-roadmap-for-2024-learn-react-the-right-way-4680

webdev, javascript, react, beginners

React has become one of the most popular libraries for building user interfaces, and it's continuously evolving. As we move into 2024, understanding the latest roadmap for learning React is crucial for developers looking to stay ahead of the curve. This guide will walk you through the essential topics and concepts you need to master to become proficient in React. We'll provide links to official documentation and resources for further reading and practice. ## 1. CLI Tools ### Vite [Vite](https://vitejs.dev/) is a next-generation front-end tool that allows for fast and optimized development. It serves as an excellent alternative to create-react-app for setting up your React projects. Vite provides a lightning-fast development server and a highly efficient build process. ### Create React App [Create React App](https://create-react-app.dev/) is the official React CLI tool for setting up a new React project. It's an excellent starting point for beginners as it abstracts away the configuration details, allowing you to focus on writing your application. ## 2. Components ### Class Components Although functional components are now the preferred way of writing components in React, understanding [class components](https://reactjs.org/docs/react-component.html) is still beneficial, especially for maintaining legacy codebases. ### Functional Components [Functional components](https://reactjs.org/docs/components-and-props.html) have become the standard for writing React components due to their simplicity and the introduction of Hooks, which allow for state and lifecycle management within these components. ### Component Life Cycle Understanding the [component lifecycle](https://reactjs.org/docs/react-component.html#the-component-lifecycle) is essential for managing the state and side effects in your application. It helps in optimizing performance and ensuring proper resource management. ### Lists and Keys Managing lists and keys correctly is crucial for performance optimization in React. Learn more about [lists and keys](https://reactjs.org/docs/lists-and-keys.html). ### Render Props [Render props](https://reactjs.org/docs/render-props.html) is a pattern for sharing code between React components using a prop whose value is a function. ### Refs [Refs](https://reactjs.org/docs/refs-and-the-dom.html) provide a way to access DOM nodes or React elements created in the render method. ### Events Handling [events](https://reactjs.org/docs/handling-events.html) in React is different from handling DOM events in plain HTML, primarily due to the virtual DOM. ### High Order Components [High Order Components](https://reactjs.org/docs/higher-order-components.html) (HOCs) are a pattern in React for reusing component logic. ## 3. State Management ### Recoil [Recoil](https://recoiljs.org/) provides a way to manage the global state in React applications. It's an alternative to other state management solutions and integrates seamlessly with the React ecosystem. ### MobX [MobX](https://mobx.js.org/README.html) is a simple, scalable state management solution that uses observables to track state changes. ### Redux / Toolkit [Redux](https://redux.js.org/) is one of the most popular state management libraries for React. The [Redux Toolkit](https://redux-toolkit.js.org/) simplifies the process of setting up and using Redux in your projects. ### Zustand [Zustand](https://zustand-demo.pmnd.rs/) is a small, fast, and scalable state management solution that provides an intuitive API for managing state in React applications. ### Context The [Context API](https://reactjs.org/docs/context.html) is built into React and allows you to share state across your application without passing props down manually through every level of the component tree. ## 4. Routers ### React Router [React Router](https://reactrouter.com/) is the standard routing library for React. It allows you to handle navigation in your single-page application effectively. ### Reach Router [Reach Router](https://reach.tech/router) aims to provide accessible routing for React applications with a focus on accessibility and simplicity. ## 5. Hooks ### Basic Hooks - **useState**: [useState](https://reactjs.org/docs/hooks-state.html) is a Hook that lets you add state to functional components. - **useEffect**: [useEffect](https://reactjs.org/docs/hooks-effect.html) lets you perform side effects in function components. ### Writing Custom Hooks [Custom Hooks](https://reactjs.org/docs/hooks-custom.html) allow you to extract component logic into reusable functions. ### Common Hooks - **useCallback**: [useCallback](https://reactjs.org/docs/hooks-reference.html#usecallback) returns a memoized callback. - **useMemo**: [useMemo](https://reactjs.org/docs/hooks-reference.html#usememo) returns a memoized value. - **useRef**: [useRef](https://reactjs.org/docs/hooks-reference.html#useref) returns a mutable ref object. - **useReducer**: [useReducer](https://reactjs.org/docs/hooks-reference.html#usereducer) is usually preferable to useState when you have complex state logic. - **useContext**: [useContext](https://reactjs.org/docs/hooks-reference.html#usecontext) lets you subscribe to React context without introducing nesting. ## 6. Styling ### Emotion [Emotion](https://emotion.sh/docs/introduction) is a performant and flexible CSS-in-JS library. ### Styled Components [Styled Components](https://styled-components.com/) allows you to write plain CSS in your JavaScript. ### CSS Modules [CSS Modules](https://github.com/css-modules/css-modules) are a popular way to write scoped CSS. ### TailwindCSS [TailwindCSS](https://tailwindcss.com/) is a utility-first CSS framework that allows you to build modern websites without leaving your HTML. ### Material UI [Material UI](https://mui.com/) is a popular React UI framework that implements Google's Material Design. ### Mantine [Mantine](https://mantine.dev/) is a modern React component library with a focus on accessibility and usability. ### Chakra UI [Chakra UI](https://chakra-ui.com/) is a simple, modular, and accessible component library that provides the building blocks you need to build your React applications. ## 7. API Calls ### REST REST is the standard for building APIs. Learn more about [REST](https://restfulapi.net/). ### SWR [SWR](https://swr.vercel.app/) is a React Hook for data fetching that makes it easy to fetch, cache, and revalidate data at the component level. ### react-query [react-query](https://tanstack.com/query/v3/) simplifies data fetching and state management in your React applications. ### Axios [Axios](https://axios-http.com/) is a promise-based HTTP client for the browser and Node.js. ### superagent [superagent](https://visionmedia.github.io/superagent/) is a small progressive client-side HTTP request library. ### rtk-query [rtk-query](https://redux-toolkit.js.org/rtk-query/overview) is part of Redux Toolkit and provides powerful data fetching and caching capabilities. ### GraphQL [GraphQL](https://graphql.org/) is a query language for your API, and a runtime for executing those queries by using a type system you define for your data. ### Apollo [Apollo](https://www.apollographql.com/) is a comprehensive state management library for JavaScript that enables you to manage both local and remote data with GraphQL. ### Relay [Relay](https://relay.dev/) is a JavaScript framework for building data-driven React applications. ### Urql [Urql](https://formidable.com/open-source/urql/) is a highly customizable and versatile GraphQL client for React. ## 8. Testing ### Jest [Jest](https://jestjs.io/) is a delightful JavaScript testing framework with a focus on simplicity. ### Vitest [Vitest](https://vitest.dev/) is a blazing-fast unit test framework powered by Vite. ### React Testing Library [React Testing Library](https://testing-library.com/docs/react-testing-library/intro/) provides simple and complete React DOM testing utilities. ### Cypress [Cypress](https://www.cypress.io/) is a next-generation front-end testing tool built for the modern web. ### Playwright [Playwright](https://playwright.dev/) enables reliable end-to-end testing for modern web apps. ## 9. Forms ### React Hook Form [React Hook Form](https://react-hook-form.com/) provides performant, flexible, and extensible forms with easy-to-use validation. ### Formik [Formik](https://formik.org/) is the world's most popular open-source form library for React and React Native. ### Final Form [Final Form](https://final-form.org/react) is a framework-agnostic library for managing form state in React. ## 10. Mobile ### React Native [React Native](https://reactnative.dev/) enables you to build mobile applications using only JavaScript and React. ## 11. Advanced Topics ### Suspense [React Suspense](https://reactjs.org/docs/concurrent-mode-suspense.html) lets you wait for some code to load and declaratively specify a loading state while waiting. ### Portals [Portals](https://reactjs.org/docs/portals.html) provide a way to render children into a DOM node that exists outside the DOM hierarchy of the parent component. ### Error Boundaries [Error Boundaries](https://reactjs.org/docs/error-boundaries.html) are React components that catch JavaScript errors anywhere in their child component tree, log those errors, and display a fallback UI instead of the component tree that crashed. ### Fiber Architecture [React Fiber](https://reactjs.org/docs/faq-internals.html) is the new reconciliation algorithm in React 16. ### Remix [Remix](https://remix.run/) is a full stack web framework that lets you focus on the user interface and works back through web fundamentals to deliver a fast, slick, and resilient user experience. ### Next.js [Next.js](https://nextjs.org/) is a React framework that enables functionality such as server-side rendering and generating static websites for React-based web applications. ## Conclusion Following this roadmap will ensure you have a comprehensive understanding of React and its ecosystem. For those looking to integrate advanced digital signature functionality using digital certificates, be sure to explore [OpenSign's official website](https://www.opensignlabs.com) and [GitHub repository](https://github.com/opensignlabs/opensign) for more insights and integration options. Stay updated with the latest in React development, and happy coding!

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