id int64 5 1.93M | title stringlengths 0 128 | description stringlengths 0 25.5k | collection_id int64 0 28.1k | published_timestamp timestamp[s] | canonical_url stringlengths 14 581 | tag_list stringlengths 0 120 | body_markdown stringlengths 0 716k | user_username stringlengths 2 30 |
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1,878,991 | Slotenmaker service | slotenmaker slotenmaker antwerpen | 0 | 2024-06-06T08:53:36 | https://dev.to/slotenmaker/slotenmaker-service-2a4c | ai, slotenmaker | [slotenmaker](https://www.slotenmakerservice.be/)
[slotenmaker antwerpen](https://www.slotenmakerservice.be/slotenmaker-antwerpen) | slotenmaker |
1,878,990 | swapping in js | Swapping two variables with one another is an extremely easy task. We need a temporary variable to... | 0 | 2024-06-06T08:53:03 | https://dev.to/yomtech/swapping-in-js-1agg | beginners, javascript, programming, tutorial | Swapping two variables with one another is an extremely easy task.
We need a temporary variable to hold the value of one variable (let's say a) while we update that variable (a) to the other variable (b, in this case).
Once the first variable (a) is updated to the second variable (b), the second variable is updated to the temporary variable.
In the code below, we create this temporary variable temp, and complete the swapping of a and b:
var a = 10;
var b = 20;
// Swap a and b
var temp = a;
a = b;
b = temp;
Let's inspect the values of a and b:
a == 20
b == 10
 | yomtech |
1,878,989 | Git Branching Strategy Guide | As a developer since 2008, I’ve witnessed the evolution of version control systems firsthand.... | 0 | 2024-06-06T08:52:24 | https://dev.to/ak_23/branching-strategy-guide-24d6 | git, learning, beginners, productivity |
As a developer since 2008, I’ve witnessed the evolution of version control systems firsthand. Starting with SVN and eventually transitioning to Git, I’ve seen how these tools have become indispensable in our daily workflows. Let me share a detailed branching strategy that has proven effective in managing codebases, ensuring stability, and facilitating collaboration.
#### Main Branches
- **`main` (or `master`) Branch:**
- The production-ready code.
- Only contains thoroughly tested and stable code.
- Direct commits are restricted; only allowed through pull requests (PRs) after code review and approval.
- **`develop` Branch:**
- The latest codebase reflecting the current state of development.
- All features and fixes are integrated into this branch before being merged into `main`.
- Serves as a base for all new feature branches.
#### Supporting Branches
- **Feature Branches:**
- **Naming Convention:** `feature/<feature-name>`
- **Created from:** `develop`
- **Purpose:** For developing new features or enhancements.
- **Merging:** Once complete and tested, merge back into `develop`.
- **Bugfix Branches:**
- **Naming Convention:** `bugfix/<issue-id>`
- **Created from:** `develop` (or `release` if the fix is for an upcoming release)
- **Purpose:** For fixing bugs identified during development.
- **Merging:** Merge back into `develop` (or `release` if applicable) once fixed.
- **Release Branches:**
- **Naming Convention:** `release/<version-number>`
- **Created from:** `develop`
- **Purpose:** To prepare for a new production release.
- **Activities:** Final testing, bug fixing, and preparing release notes.
- **Merging:** Merge into both `main` and `develop` once ready.
- **Hotfix Branches:**
- **Naming Convention:** `hotfix/<issue-id>`
- **Created from:** `main`
- **Purpose:** For urgent fixes that need to go directly into production.
- **Merging:** Merge into both `main` and `develop` once applied.
#### Branch Workflow
1. **Feature Development:**
- Create a branch from `develop` using `feature/<feature-name>`.
- Implement the feature, commit changes, and push the branch to the repository.
- Open a pull request to merge the feature branch into `develop`.
- Conduct code reviews, perform necessary tests, and merge the changes into `develop`.
2. **Bug Fixing:**
- Create a branch from `develop` using `bugfix/<issue-id>`.
- Fix the bug, commit changes, and push the branch.
- Open a pull request to merge the bugfix branch into `develop`.
- After reviews and tests, merge the changes into `develop`.
3. **Release Preparation:**
- Create a branch from `develop` using `release/<version-number>`.
- Perform final testing, fix any last-minute bugs, and update documentation.
- Merge the release branch into both `main` and `develop` once ready.
4. **Hotfixes:**
- Create a branch from `main` using `hotfix/<issue-id>`.
- Apply the fix, commit changes, and push the branch.
- Open a pull request to merge the hotfix branch into `main`.
- Merge changes into `develop` to include the fix in ongoing development.
#### Best Practices
- **Regular Merges:** Merge `develop` into feature branches regularly to stay updated and avoid integration issues.
- **Code Reviews:** Conduct mandatory code reviews before merging any branch to ensure quality and adherence to standards.
- **Automated Testing:** Implement continuous integration with automated testing to catch issues early and maintain code quality.
- **Documentation:** Keep all changes well-documented, including comments in code, update logs, and comprehensive commit messages.
[Demystifying Advanced Git Commands: A Simple Guide](https://dev.to/amit_k_812b560fb293c72152/demystifying-advanced-git-commands-a-simple-guide-1lpj)
---
[Explore More: AI Development Phases](https://dev.to/ak_23/phases-of-ai-development-1g2)
If you're interested in expanding your knowledge beyond Git branching strategies, check out our latest post on AI Development Phases. This comprehensive guide covers the key stages involved in developing AI solutions, from initial planning to deployment and maintenance. Whether you're a beginner or an experienced professional, this post provides valuable insights to help you navigate the complex landscape of AI development.
[Read the AI Development Phases Post](https://dev.to/ak_23/phases-of-ai-development-1g2)
---
### SVN vs. Git Comparison
#### SVN (Subversion)
- **Centralized Version Control:** SVN relies on a central server to store all versions of the project files.
- **Commit Structure:** Changes are committed directly to the central repository.
- **Branching:** Branches are typically created on the server, and branching operations can be slow and resource-intensive.
- **Merging:** Merging can be more complex and less efficient compared to Git.
#### Git
- **Distributed Version Control:** Git allows every developer to have a local copy of the entire project history.
- **Commit Structure:** Changes are committed locally first and can be pushed to a remote repository.
- **Branching:** Branching is lightweight and fast, encouraging the use of feature branches.
- **Merging:** Git’s merging capabilities are more advanced, making it easier to integrate changes from different branches.
---
I hope this guide helps you as much as Git has helped me since it became my everyday buddy. Happy coding!
--- | ak_23 |
1,878,988 | newbie needs help | Hi there, I am new to programming and now learning web development with Vue.js a year ago I started... | 0 | 2024-06-06T08:52:13 | https://dev.to/hassan-wanas/newbie-needs-help-5cb6 | newbie, career, beginners, help | Hi there,
I am new to programming and now learning web development with Vue.js
a year ago I started learning HTML5, CSS3, JavaScript, some basics of vue.js, and Tailwind CSS.
Then I stopped for about the year mentioned and came back to continue my learning journey a month ago buying a course on Vue.js and Firebase on Udemy.
Do I need to review the basics again?
as I nearly ended up the course.
What do I need to do to land my first job?
I searched for it and found out that I need to follow these steps:
- Refine my GitHub account with a readme file as a resume for GitHub or something
- Start making a portfolio
- Start making projects to add to my portfolio
- write some posts on LinkedIn and give networking some of my time
- The most important point is that I should start applying for jobs because I do not know when I am ready.
So would it be a good idea to get a job with no experience?
- in the interview, they will know that I have no experience right?
I mean will they accept me and how would it go ? will I be trained or what?
| hassan-wanas |
1,878,986 | Upgrade Edition of Keltner Channel trading Strategy | Introduction to the Keltner Channel trading Strategy The Keltner channel is a trading... | 0 | 2024-06-06T08:49:56 | https://dev.to/fmzquant/upgrade-edition-of-keltner-channel-trading-strategy-48mg | trading, strategy, keltner, fmzquant | ## Introduction to the Keltner Channel trading Strategy
The Keltner channel is a trading system invented by Chester W. Keltner in the 1960s. Its core idea is the average line theory. And at that time the system had achieved remarkable results for a very long time. Although the original Keltner channel system was not as effective as it was when it first appeared, its core idea has so far had a profound impact on the trading community.
## The principle of the Keltner channel
Speaking of the channel type strategy, you may think of the famous Bollinger Band (BOLL), but the difference is that the Keltner channel uses the average of the highest price, the lowest price, and the closing price as the base price, and then calculates The N-period average of this base price, which is the middle rail of the Keltner channel. The upper rail is the multiple of the middle rail plus the fluctuation amplitude, and the lower rail is the multiple of the middle rail minus the fluctuation amplitude.
So how is this fluctuation amplitude calculated? That is, the average value of the N period (highest price - lowest price), multiplied by a certain number. In this way, you will find that it is similar to the Bollinger Band (BOLL), there is also the price of the middle rail, and the upper and lower rails calculated according to the price of the middle rail. However, the Keltner channel is smoother than the Bollinger Band (BOLL).
## Calculation formula of Keltner channel
- Base price: (highest price + lowest price + closing price) / 3
- Middle rail: N-period moving average of the base price
- Volatility: highest price - lowest price
- Upper rail: middle rail + fluctuation amplitude * multiple
- Lower rail: middle rail - fluctuation amplitude * multiple
## Upgraded version of Keltner Strategy
Later on, the Keltner channel was improved by Linda Raschke. Linda Raschke is a well-known trader in commodity futures in the US and president of LBR Asset Management. The original Keltner strategy Middle rail is a normal moving average that was changed to an exponential average. In addition, the calculation method of the fluctuation range is also changed to the average true fluctuation range (ATR). Its calculation formula is:
- Base price: (highest price + lowest price + closing price) / 3
- Middle rail: N-period exponential moving average of the base price
- Volatility: Average true fluctuation range (ATR)
- Upper rail: middle rail + fluctuation range
- Lower rail: middle rail - fluctuation range
## Keltner channel trading strategy
We know that prices don't always run in a trend or turbulent way, but in a way that trends and oscillations do not completely alternate randomly. Then Keltner uses the channel as a dividing line to separate the trend market from the turbulent market. When the price runs between the upper and lower rails, we can think of it as a turbulent market. When the price breaks above the upper limit, it shows that a stronger buying pressure has emerged, and the price will continue rise in the future. When the price breaks the lower rail, it shows that there is already a stronger selling pressure, and the price may continue fall in the future.
**Open Position**
- The middle rail is up, and the price rises above the upper rail, opening long position;
- The middle rail is down, and the price falls below the lower rail, opening short position;
**Close Position**
- When holding long position, the price fell below the middle rail, close long position;
- When holding short position, the price rises above the middle rail, close short position;
## Using MyLanguage to write Keltner Strategy
Through the above trading logic, we can build this strategy on the FMZ Quant platform. Let's using the Mylanguage as an example. Following these steps: fmz.com > Login > Dashboard > Strategy Library > New Strategy > Click the drop-down box in the upper left corner to select My language, start writing the strategy, and pay attention to the comments in the code below.
```
// parameter
MAN:=20;
ATRN:=50;
JG:=(HIGH+LOW+CLOSE)/3; // base price
ZG:MA(JG, MAN); // Middle rail
TRUEHIGH1:=IF(HIGH>REF(C,1),HIGH,REF(C,1));
TRUELOW1:=IF(LOW<=REF(C,1), LOW, REF(C,1));
TRUERANGE1:=IF(ISLASTBAR,H-L,TRUEHIGH1-TRUELOW1); // Calculate the true fluctuation range
SG: ZG+MA (TRUERANGE1, ATRN); // Upper rail
XG: ZG-MA (TRUERANGE1, ATRN); // Lower rail
ZG>REF(ZG,1)&&C>SG,BK; // The middle rail is up, and the price rises above the upper rail. open long position
C<ZG, SP; // When holding long position, the price falls below the middle rail, close long position
ZG<REF(ZG,1)&&C<XG,SK; // The middle rail is down, and the price falls below the lower rail, open short position
C>ZG, BP; // When holding short position, the price rises above the middle rail, close short position
AUTOFILTER; // Set the signal filtering method
```
## Keltner Strategy Backtest
In order to get closer to the real trading environment, we used the 2 pips of slippage and 2 times the normal transaction fee to test the pressure during the backtest. The test environment is as follows:
- Exchange: BitMEX
- Trading Target: XBTUSD
- Time: January 01, 2019 ~ July 27, 2019
- Cycle: one hour k-line
- Slippage: 2 pips for opening and closing positions
- Fee: 2 times of the normal exchange transaction fee
**Backtest environment**
**Profit report**
**Fund curve**
The above figures are the backtest results of the XBTUSD perpetual contract on the BitMEX exchange. In the trend market, Keltner strategy still maintains valid. Although its efficiency is not too high, the overall fund curve is upward. Even in the retracement of the market trend in July 2019, the net value curve did not have a large retracement.
## Strategy source code
For the complete source code of this strategy, please click it : https://www.fmz.com/strategy/159285
## Summary
Although Keltner is an old trading method, we have restored its value through coding its logic and improved it. It turns out that this strategy is still valid today. Especially in the field of low and medium frequency CTA strategy, Keltner strategy still has something to dig from, that is, cut off losses and let profits run!
It can be said that most successful trading methods adhere to the trading philosophy of “Less loss when losing, earn a little more when earing”, and then consistently implement this concept. Therefore, as a long-term trading strategy, the short-term loss will inevitably bear the cost, and short-term profit is not our goal.
From: https://blog.mathquant.com/2019/07/31/upgrade-edition-of-keltner-channel-trading-strategy.html | fmzquant |
1,878,984 | Purple Grape Twist E Liquid Flavor 120ml Vape Device | *Introduction * Are you craving a vaping experience that tantalizes your taste buds with a burst of... | 0 | 2024-06-06T08:49:01 | https://dev.to/twisteliquid/purple-grape-twist-e-liquid-flavor-120ml-vape-device-4k84 | twist, purple, grape, eliquid | **Introduction
**
Are you craving a vaping experience that tantalizes your taste buds with a burst of fruity goodness? Look no further than Purple Grape Twist E-Liquid Flavor! With its luscious blend of ripe grapes and subtle twists of sweetness, this flavor promises to elevate your vaping journey to new heights. Whether you're a seasoned vaper or just starting out, this 120ml vape device-compatible e-liquid is sure to become your next obsession.
**The Essence of Purple Grapes
**
Dive into a sea of succulent purple grapes with every puff. Our Purple Grape Twist E-Liquid Flavor captures the essence of these plump, juicy fruits, delivering an authentic taste that's both refreshing and satisfying. Say goodbye to artificial flavors and hello to pure grape goodness!
**A Twist of Sweetness
**
What sets our Purple Grape Twist E-Liquid Flavor apart is its subtle twist of sweetness. We've carefully balanced the natural tartness of grapes with just the right amount of sweetness, creating a harmonious flavor profile that keeps you coming back for more. Prepare your taste buds for a delightful dance of flavors with each inhale and exhale.
**Smooth Vaping Experience
**
Compatible with 120ml vape devices, our e-liquid ensures a smooth and enjoyable vaping experience every time. Whether you prefer sub-ohm vaping or mouth-to-lung inhales, you can trust Purple Grape Twist to deliver consistent flavor and satisfying clouds. It's the perfect companion for your vaping adventures, whether you're at home or on the go.
**Quality Ingredients, Premium Taste
**
At Purple Grape Twist, quality is our top priority. We use only the finest ingredients to craft our e-liquids, ensuring a premium taste that exceeds expectations. Each bottle undergoes rigorous testing and quality control measures to guarantee freshness and purity. With Purple Grape Twist, you can vape with confidence, knowing you're getting the best of the best.
**Conclusion
**
Indulge your senses in the irresistible allure of Purple Grape Twist E-Liquid Flavor. With its tantalizing blend of ripe grapes and subtle sweetness, this 120ml vape device-compatible e-liquid promises to elevate your vaping experience to a whole new level. Whether you're a fruit enthusiast or simply seeking a deliciously satisfying vape, Purple Grape Twist is sure to become your new favorite flavor. Try it today and discover why vapers everywhere are falling in love with Purple Grape Twist!
[https://twistofficialwebsite.com/product/grape-berry-twist-e-liquid-flavor-120ml-vape-device/
]
| twisteliquid |
1,878,983 | How not to learn HTML and CSS | When starting off with learning any language, VS(Visual studio) code does not disappoint in serving... | 0 | 2024-06-06T08:47:11 | https://dev.to/jaydenomins/how-not-to-learn-html-and-css-59oh | When starting off with learning any language, VS(Visual studio) code does not disappoint in serving as a good text editor. A fan favourite reason being the rich auto completion feature that auto completes code elements for various languages.
In the process of learning a language, a person might be doing well following tutorials whilst using this auto completion feature until the time comes to write a line of code without a tutorial, and especially without auto completion.
You will find out that you have not truly mastered how to write the actual elements of not just HTML and CSS but any programming language.
It's right at the back of your mind but you can't quite write it correctly.
**<u>
## How can you solve this problem?
</u>**
-
Navigate to VSCode settings and look for inline.
-
Untick the checkbox to enable/disable inline suggestions.
-
You can go further by:
Going to Tools -> Options -> IntelliCode -> Completions for whole lines of code(turn this off).
After doing all this , your coding will be more hands on and you will eventually be able to recall HTML and CSS elements like the back of your hand. | jaydenomins | |
1,878,981 | Fabric Filters: Keeping Industrial Air Clean | Industrial Air Warriors: Fabric Filters https://www.intensiv-filter-himenviro.com/ In today's world,... | 0 | 2024-06-06T08:46:07 | https://dev.to/marketing_intensivfilterh/fabric-filters-keeping-industrial-air-clean-2lkc | webdev, javascript, beginners, programming | Industrial Air Warriors: Fabric Filters
https://www.intensiv-filter-himenviro.com/
In today's world, where factories and plants strive to be eco-friendly and meet air quality standards, fabric filters play a critical role in capturing dust, fumes, and other nasty particles from factory emissions. This article explores how these filters work, their advantages, and why they're important for clean air.
The Science of Fabric Filters
Also known as baghouse filters, fabric filters are like super-sieves for air. They use finely woven bags or tubes to trap particles as polluted air flows through them. The clean air is then released, leaving the nasty stuff behind. This filtration process is essential for protecting people's health and the environment.
Benefits of Fabric Filters
Here's why fabric filters are rockstars in air pollution control:
Super Catchers: They can grab even tiny particles, ensuring factories meet strict emission regulations.
All-Rounders: No matter the size, type, or amount of particles, fabric filters can handle it, making them suitable for many industries.
Energy Efficient: These filters operate smoothly without needing a lot of extra energy.
Adaptable: They can be easily adjusted to fit different needs and pollution levels.
Long-Lasting: With proper care, fabric filters can work for a long time, making them a sustainable solution.
Different Types of Fabric Filters
Just like different tools are used for different jobs, there are various types of fabric filters, each suited for specific situations:
Pulse-Jet: These filters use short blasts of compressed air to knock particles off the fabric, keeping them working continuously.
Reverse Air: For sticky or clumpy particles, reverse air filters use a reversed airflow to clean the fabric.
Shaker-Type: These filters give the fabric a good shake to remove built-up particles. They're a simple and cost-effective option.
Clean Air for Everyone
Fabric filters are air quality heroes. By capturing pollutants, they create cleaner air for everyone to breathe, protecting our health and the environment.
The Takeaway: Champions of Clean Air
In a world concerned about air quality, fabric filters are champions. They help factories comply with regulations, safeguard health, and promote sustainable practices. Understanding these filters is crucial for effective air pollution control strategies. Let's keep the skies clear and our lungs healthy with the help of these amazing filtration systems!
Also Check-[air pollution control equipments](https://www.intensiv-filter-himenviro.com/
)
[dust collector](https://www.intensiv-filter-himenviro.com/
)
https://www.intensiv-filter-himenviro.com/info/blogs/demystifying-fabric-filters-a-comprehensive-guide-to-their-functionality
website www.intensiv-filter-himenviro.com
Mail- sales@intensiv-filter-himenviro.com
Phone "+49-2053-4200990
+91 92050 82364"
Germany "Intensiv Filter Himenviro Technologies
GmbH Neustraße 45 - 49, 42553,
Velbert, Deutschland/Germany
+49 20534200990"
India "Intensiv-Filter Himenviro Private Limited
D-247/11, Sector-63, Noida - 201301,
Uttar Pradesh, India
+91-120-4642-500"
United Arab Emirates "Intensive Filter Himenviro Technologies
FZE – LLC Business Centre,
Sharjah Publishing City Free Zone,
Sharjah, UAE
+971-556074697" | marketing_intensivfilterh |
1,878,980 | Top 10 Mobile App Testing Tools | Mobile applications have become an integral part of our daily lives. From social media to online... | 0 | 2024-06-06T08:45:53 | https://dev.to/morrismoses149/top-10-mobile-app-testing-tools-2pab | mobileapp, testingtools, testgrid | Mobile applications have become an integral part of our daily lives. From social media to online shopping, work management to fitness tracking, the number of mobile apps and their users is surging across all categories. With the ever-increasing number of apps and users, ensuring the seamless functionality and superior quality of these applications has become crucial for developers. In this article, we will introduce you to the best mobile test automation tools and will also provide some tips for selecting the right tool for your needs.
## Here are some of the factors to consider when choosing a mobile automation Testing tool:
With so many mobile app testing tools available, choosing the right one can greatly affect the quality of the final product. It’s important to know what makes a testing tool stand out. Here are the key things to look for.
Always go for Real Devices, no emulators & simulators: While emulators and simulators are great for early-stage testing, real device testing is crucial for understanding real-world performance. The tool should seamlessly integrate with both of them.
**The type of app being tested**: The type of app being tested dictates the appropriate testing framework. Native apps require tools that simulate real-world user interactions, such as Appium. Web apps are best tested with frameworks like Selenium, which can simulate browser interactions.
**Cross-platform compatibility**: As mobile apps become increasingly cross-platform, it’s essential to choose a tool that supports multiple platforms like iOS, Android, and Windows. The tool should allow you to write tests once and run them across different platforms.
**Budget**: Mobile testing tools can range from free options to higher-priced enterprise solutions.
**Scalability**: When considering the scalability of a mobile test automation tool, look for one that supports parallel test execution. Make sure it efficiently handles larger test suites and offers cloud testing capabilities.
**Third-party integrations:** The tool should integrate with third-party services such as JIRA, Trello, Slack, or GitHub, allowing teams to streamline their workflow and leverage existing tools.
## Best Mobile Test Automation Tools
### TestGrid
TestGrid offers a comprehensive suite of features for end-to-end mobile test automation, from app testing to load testing to API testing. It allows users to conduct both manual and AI based codeless automation on real devices hosted on the cloud, on-premise or in a hybrid manner.
With the AI-driven scriptless approach, you can easily automate Functional, Performance, Visual, and Compatibility testing.
Here are some of the benefits of using TestGrid for mobile app testing:
- TestGrid can test your apps on hundreds of real devices ranging from Android, iOS, Samsung, Oppo, Pixel and more.
- Users can perform codeless automation & save their time on testing complex use cases.
- Integrate with custom scripts or code, which can give you more flexibility in your testing process.
- It also offers AI-driven auto heal to reduce maintenance and automatically identify and fix defects.
- Allows you to create custom dashboards to visualize your test results and get insights into the performance of your apps.
- TestGrid integrates seamlessly with popular CI/CD tools, allowing users to automate their entire testing process.
- Reserve a device for a period of time for exclusive access. This can be useful if you need to test a specific app or feature in a controlled environment.
### Appium
Appium is a widely used mobile app testing tool, mostly preferred by open-source communities. It allows you to automate testing for native, hybrid, and web applications on iOS and Android platforms.
Appium supports a variety of programming languages, including Java, Python, Ruby, and C#.
Here are some key things to know about Appium testing:
- Appium is Cross-platform compatible which means it allows you to write tests once and run them on multiple platforms, saving time and effort.
- Appium provides support for testing hybrid applications that combine native and web elements.
- It supports parallel testing, which allows you to run multiple test scripts simultaneously.
- It has extensive documentation and a large community of users and contributors.
### Selendroid
Selendroid is an open-source test automation tool specifically designed for Android applications. It can be used to automate the testing process for both native and hybrid Android apps, as well as mobile web applications.
**Features:**
- Selendroid supports hot plugging of hardware devices, which means that you can connect or disconnect hardware devices to your Android device without needing to restart the app or the device.
- It also comes with a built-in inspector that helps simplify test case development. The inspector provides a graphical user interface for analyzing the UI components of an Android application.
- Selendroid can simultaneously engage with multiple Android devices, whether they are emulators or physical devices, allowing for efficient testing and automation across various platforms.
- It ensures seamless integration with the JSON Wire Protocol and Selenium
### ACCELQ
Accelq is an AI-powered codeless test automation platform that helps enterprises deliver high-quality software faster. ACCELQ offers a comprehensive solution for testing various types of applications, including mobile, web, API, database, and packaged apps, through a single platform.
Its automation-first approach and codeless capabilities make it accessible to testing teams with limited programming knowledge. This enables them to efficiently validate the functionality and performance of their applications.
**Features**:
- Accelq can automate testing across the entire software development lifecycle, from requirements gathering to deployment.
- It utilizes artificial intelligence and machine learning algorithms to automate the testing process intelligently. It can understand and adapt to application changes, reducing maintenance effort and increasing test coverage.
- Supports integration with popular testing frameworks and CI/CD tools
- AccelQ promotes collaboration among team members by providing a centralized platform for test design, execution, and reporting.
### Calabash
Calabash is a Behavior Driven Development (BDD) framework for automating mobile app testing. It uses natural language to interact with mobile apps, making it easier to write tests that are clear, concise, and easy to understand. It consists of two test libraries: calabash-android and calabash-iOS. Calabash also supports a variety of other features, such as parallel testing, test reporting, and test coverage analysis.
Some key features of Calabash include:
- Calabash supports test coverage analysis, which can help you to determine how well your tests are covering your app’s code.
- Calabash provides mobile-specific functionality, such as the ability to interact with mobile devices, simulate gestures, and verify the appearance of elements on the screen.
- Calabash allows developers to test their apps on physical devices, providing a more accurate representation of how the app will behave in real-world scenarios.
### Ranorex
Ranorex is a powerful testing software that can be used to automate desktop, web, and mobile applications. It is easy to use, even for non-technical users, and it supports a wide range of programming languages.
**Features**:
- Ranorex Studio uses a powerful object recognition engine to identify UI elements even when they are not visible or have been changed.
- It integrates with various popular tools, such as Jenkins, Jira, and TestRail, making it easy to automate your entire testing process.
### Kobiton
Kobiton is a mobile-first testing platform that helps enterprises streamline their testing processes. It offers a variety of features to automate testing, including scriptless automation, visual testing, and performance testing. Kobiton utilizes the Appium framework, which provides a uniform way to interact with various mobile platforms and undergoes frequent updates to enhance its testing capabilities and efficiency.
**Features:**
- Offers access to the hundreds of latest devices on a flexible real device testing cloud, ensuring apps are tested in real-world conditions.
- Kobiton provides comprehensive support for a variety of widely used testing frameworks, including Appium, Selenium, XCUI, Espresso, and others.
- In addition to functional testing, Kobiton performs thorough performance evaluation, detecting anomalies such as CPU spikes, battery drain, and latency.
- Kobiton supports mobile continuous testing, self-healing test scripts, and integration into all CI/CD platforms for a seamless workflow.
### TestComplete Mobile
TestComplete, developed by SmartBear Software, can automate UI actions on real devices or emulators using script-free record and replay.
**Features:**
- Use a library of pre-defined keywords to create tests that are easy to maintain and update.
- Allows tests to run in parallel across multiple devices and operating systems, ensuring comprehensive coverage.
- Allows you to record your test steps as you interact with the app, and then play them back to automate the test.
Also Read: [15 Amazing Automation Testing Tools to Ease Your Testing Journey](https://testgrid.io/blog/automation-testing-tools/)
### Eggplant
Eggplant is a versatile tool for automating GUI testing across various platforms and technologies. By using its image-based approach, it enables users to create a single script that can seamlessly automate diverse combinations of mobile, desktop, and web applications. This streamlines the testing process and maximizes efficiency.
**Features:**
- Eggplant automates GUI testing using image-based testing. Testers can simply record actions, and Eggplant generates test scripts. No coding is needed.
- Eggplant can automate complex tests, such as tests that involve multiple windows or tabs, or tests that require the user to interact with a database.
- It uses a unique English-like scripting language: SenseTalk
- Its AI-powered automation capabilities can help you to automate even the most complex tests.
### Frank
Frank is a testing tool designed specifically for iOS and Mac applications. It uses the Cucumber framework to write tests in a natural language style. It has a powerful app inspector called Symbiote that can be used to get detailed information about your running app.
**Features:**
- Integrating Frank with an iOS app is straightforward and can be completed in less than 10 minutes.
- Offers the capability to record videos of test runs, showcasing the app’s behavior during testing.
- Frank integrates with continuous integration (CI) systems, so you can run your tests on every checkin.
- Comes with a powerful app inspector that can be used to get detailed information about your app.
## Conclusion
In this blog, we explored different mobile app testing tools that have gained recognition and popularity in the industry. These tools help developers and testers streamline their testing processes. They minimize manual effort and enhance overall testing efficiency.
It is essential to equip oneself with the best mobile automation testing tools, embrace innovation, and create exceptional mobile experiences that leave a lasting impact.This blog is originally published at [TestGrid](https://testgrid.io/blog/mobile-test-automation-tools/)
| morrismoses149 |
1,878,976 | CA Inter result 2024 Passing Percentage - Complete Analysis | Introduction to CA Inter result 2024 Passing Percentage It is anticipated that the... | 0 | 2024-06-06T08:41:04 | https://dev.to/simrasah/ca-inter-result-2024-passing-percentage-complete-analysis-3oi2 |
## Introduction to CA Inter result 2024 Passing Percentage
It is anticipated that the [**CA Inter result 2024 passing percentage**](https://www.studyathome.org/ca-exam-result-may-2024-date-toppers-pass-percentage/) will be revealed shortly. The demanding three-level Chartered Accountants (CA) test is administered by the Institute of Chartered Accountants of India (ICAI) to evaluate applicants' knowledge of taxation, law, accounting, auditing, and related subjects. Those who successfully complete all three levels will be equipped with the knowledge and abilities needed for jobs in finance and accounting.
The Intermediate and Final CA Exams for May 2024 are already over. **CA final result May 2024 pass percentage** ICAI-administered CA final result is shown below. Exams are divided into two groups, therefore which candidates can pass concurrently or individually. The dates of the **CA Inter result 2024 passing percentage** test were May 2–May 16.
Candidates are now looking forward to the results, therefore the ICAI is anticipated to release in July, once the exam dates have passed. You will require your registration and roll number in order to view your results online. This blog will offer a direct access to the ICAI Result page for your convenience.
## About CA Final result May 2024 Pass Percentage
The Institute of Chartered Accountants of India (ICAI) has not formally announced the date for the **CA Inter result 2024 passing percentage**. Typically, ICAI releases results one to two months after concluding the examinations.
Considering that the examinations took place from May 2nd to May 16th in 2024, ICAI is expected to issue the CA Inter result 2024 around July 2024. It's crucial to remember that this is only an estimate, thus that ICAI may really make an announcement sooner or later.
## Pass Percentage of CA Inter result
The precise date of the Intermediate Result May 2024 has not yet been announced by the Institute of Chartered Accountants of India (ICAI), but we may estimate it with confidence based on past patterns.
ICAI usually releases the results a month or so following the conclusion of the tests. The **CA Inter result 2024 passing percentage** were held from May 2 to May 10 in accordance with previous schedules.
It is feasible to anticipate the announcement of the **CA final result May 2024 pass percentage** around July 2024 based on this pattern. Thus it's important to keep in mind that this is only an estimate. And that ICAI may make an official statement at some point in the future.
## Events for CA Final result 2024 Passing Percentage
Attaining the pass % for the CA Final result in May 2024 is an essential step towards becoming a chartered accountant. It is important for applicants to remember the following dates in order to prepare:
The dates of the **CA Inter result 2024 passing percentage** are set for May 3rd through May 17th.
Anticipated outcomes are for July 2024, subject to formal validation from ICAI.
In addition, the passing % and Topper List for the CA Inter result 2024 are anticipated in July 2024, thus subject to ICAI certification.
These are the dates that you need to know in order to prepare and be ready for this important test time.
## How Can I View My May 2024 Exam Results?
Use these simple methods to view the CA Final & Intermediate Result for May 2024:
1. Check Out the Official Website: Proceed to the ICAI's official website.
2. Enter Roll Number: Fill in the appropriate area with your six-digit roll number for the **CA Inter result 2024 passing percentage**.
3. Provide your 4-digit Personal Identification Number (PIN) or Registration Number. Use your CA Inter result 2024 registration number if you can't recall it.
4. Finish the CAPTCHA Verification by entering the text that is presented in the appropriate box to verify that you are human.
5. View Your Result: To view your **CA final result May 2024 pass percentage** & Intermediate Result for May 2024 on the screen, click the "SUBMIT" button. Additionally, you may print your statement of marks by downloading it in PDF format future reference.
## Exam Pass Rate - November 2023
The demanding standards and challenges experienced by prospective chartered accountants are seen in the passing rates for the **CA Inter result 2024 passing percentage**. The cumulative pass rate for Group I and Group II of the result 2024 passing percentage test was 9.42%. With their separate pass percentages being 9.46% and 21.6%. Therefore these numbers highlight how challenging the CA Final test is. And how crucial it is to have a solid foundation in accounting, auditing, taxation, and law.
Similar to this, depending on the tries and groupings, thus the pass rates for the CA Intermediate test in 2023 ranged from 10% to 20%. These figures demonstrate how the Institute of Chartered Accountants of India (ICAI) has strict evaluation guidelines. In order to **CA Inter result 2024 passing percentage**. Aspiring chartered accountants must concentrate on their study and have a thorough comprehension of intricate financial topics.
## November 2023 CA Final Pass Probability
The following are the pass rates for the **CA final result May 2024 pass percentage**:
With 6,176 out of 65,294 applicants passing for Group I, the pass percentage was 9.46%.
In Group II, 13,540 out of 62,679 applicants were successful, thus yielding a 21.6% pass percentage.
3,099 out of 32,907 applicants in both categories were successful, thus resulting in a 9.42% success rate.
These numbers demonstrate the strict evaluation criteria and high standards that the **CA Inter result 2024 passing percentage** ICAI has for prospective chartered accountants.
## Nov 2023 - CA Inter result 2024 Passing Percentage
The breakdown of pass rates for the 2024 passing percentage result is as follows:
Group I had a pass rate of 16.78% with 19,686 test takers out of 117,304.
With 17,957 out of 96,638 candidates passing, thus Group II had a 19.18% pass rate.
5,204 out of 53,459 candidates that took the exam were successful for both categories combined. Therefore resulting in a 9.73% pass percentage.
These figures highlight the ICAI's strict standards and evaluation procedure. Highlighting how crucial it is to prepare well and have a solid understanding of the subject. | simrasah | |
1,878,975 | IoT Interview Questions and Answers | Introduction The Internet of Things (IoT) continues to revolutionize various industries, the demand... | 0 | 2024-06-06T08:41:00 | https://dev.to/lalyadav/iot-interview-questions-and-answers-ddp | iot, programming, coding | Introduction
The Internet of Things (IoT) continues to revolutionize various industries, the demand for skilled professionals in this field is on the rise. If you’re a fresher looking to kickstart your career in IoT, it’s essential to be well-prepared for interviews. To help you out, we’ve compiled a list of the [top IoT interview questions and answers](https://www.onlineinterviewquestions.com/iot-interview-questions/).
Q1. What is IoT?
Ans: IoT refers to a network of interconnected devices that communicate and exchange data over the internet. These devices can range from everyday objects like smartphones and wearable devices to industrial machines and sensors.
Q2. How does IoT work?
Ans: IoT devices collect data through sensors and transmit it to a central system or cloud server via the internet. This data is then processed and analyzed to extract meaningful insights or trigger actions.
Q3. What are some common applications of IoT?
Ans: IoT finds applications in various domains, including smart homes, healthcare, agriculture, industrial automation, and smart cities. Examples include home automation systems, wearable health monitors, precision agriculture solutions, and traffic management systems.
Q4. What are the key components of an IoT system?
Ans: An IoT system consists of three main components: sensors/devices, connectivity, and data processing. Sensors/devices collect data, connectivity enables communication between devices and the cloud, and data processing involves analyzing and deriving insights from the collected data.
Q5. What are the different communication protocols used in IoT?
Ans: Common communication protocols used in IoT include MQTT, HTTP, CoAP, and AMQP. These protocols facilitate efficient data exchange between IoT devices and cloud servers.
Q6. What is MQTT?
Ans: MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol designed for IoT applications. It enables efficient communication between IoT devices and servers, making it ideal for low-bandwidth, high-latency networks.
Q7. What is edge computing in IoT?
Ans: Edge computing involves processing data locally on IoT devices or gateways, rather than sending it to a central cloud server for processing. This helps reduce latency, minimize bandwidth usage, and enhance real-time decision-making in IoT applications. | lalyadav |
1,878,973 | Top Free Game Engines for Aspiring Developers | What Are Game Engines? Game engines are specialized development software used to create... | 0 | 2024-06-06T08:38:43 | https://dev.to/zoltan_fehervari_52b16d1d/top-free-game-engines-for-aspiring-developers-68a | gamedev, freegameengines, gameengines, programming | ## What Are Game Engines?
[Game engines](https://bluebirdinternational.com/free-game-engines/) are specialized development software used to create video games. They provide the necessary tools to render 2D or 3D graphics, play sounds, handle physics calculations, and enable various gameplay mechanics. Game engines also manage complex tasks such as memory management, networking, and streaming, allowing developers to focus on game design and creativity.
## Key Features of Game Engines:
Rendering of 2D and/or 3D graphics
Sound and music playback
Physics engine for simulating real-world behavior
Networking capabilities for multiplayer games
Memory management and optimization
Scripting or programming language support
Support for asset management and importing
## Recommended Free Game Engines
1. Unity
Features: Advanced graphics, cross-platform development, extensive asset store
Strengths: Intuitive interface, extensive documentation, and community support
2. Unreal Engine
Features: High-quality visuals, powerful blueprint visual scripting, VR support
Strengths: Advanced rendering capabilities and flexible development environment
3. Godot
Features: Open-source, intuitive visual scripting, 2D and 3D support
Strengths: User-friendly interface and strong community support
4. CryEngine
Features: Photorealistic visuals, advanced AI system, real-time animation editing
Strengths: High-quality graphics and comprehensive tools for game development
5. Armory
Features: Based on Blender 3D, seamless workflow for artists and designers
Strengths: Open-source, supports multiple platforms including HTML5
## Do Game Engines Require Programming?
Yes, programming skills are essential for using game engines effectively. Most game engines use languages like C++, C#, JavaScript, Python, and Java. However, some game engines offer visual scripting or drag-and-drop functionality, which lowers the barrier to entry for those without extensive coding knowledge.
## Easiest Game Engines for Beginners
1. Scratch
Features: Drag-and-drop interface, beginner-friendly
Strengths: Great for learning basic programming concepts
2. Construct 3
Features: Browser-based, visual scripting, supports 2D and 3D
Strengths: Intuitive design and easy for beginners
3. GDevelop
Features: Open-source, visual scripting, easy prototyping
Strengths: Focus on creativity and rapid game development
4. ClickTeam Fusion
Features: Simplified game development, easy-to-use interface
Strengths: Suitable for beginners
5. Microsoft MakeCode Arcade
Features: Similar to Scratch, beginner-friendly
Strengths: Great for young developers
C++ or C# for Game Development?
C++
Strengths: Low-level control, high performance, extensive libraries and frameworks
Weaknesses: Steep learning curve, complex syntax
C#
Strengths: User-friendly, native support in Unity, simpler syntax
Weaknesses: Less control over hardware, potentially lower performance
The choice between C++ and C# depends on the game engine and the developer’s preference. C++ is suitable for high-performance games, while C# is ideal for Unity-based projects.
## Free Game Engines That Use C++
1. CryEngine
Features: High-quality graphics, advanced rendering capabilities
Strengths: Comprehensive tools for immersive gaming experiences
2. Godot
Features: Open-source, visual scripting, supports C++
Strengths: User-friendly interface and flexibility
3. Unreal Engine
Features: Wide range of features for high-quality games
Strengths: Strong foundation in C++ for advanced programming
4. Unity
Features: Extensive asset library, cross-platform support
Strengths: Popular among beginners and experienced developers
Benefits of No-Code Game Engines
1. Lower Barrier to Entry
Enables non-programmers to create games
Expands the reach of game development to a wider audience
2. Faster Development Process
Pre-built systems and tools for quick prototyping
Allows focus on creative aspects rather than coding
3. Focus on Game Design
Intuitive interfaces and visual scripting
Encourages creativity and experimentation | zoltan_fehervari_52b16d1d |
1,878,972 | Amazon Packaging Material Online: A Comprehensive Guide | In the fast-paced world of e-commerce, efficient and reliable packaging is crucial for ensuring that... | 0 | 2024-06-06T08:38:17 | https://dev.to/avonpackaging/amazon-packaging-material-online-a-comprehensive-guide-ho | amazon, packaging, material, online | In the fast-paced world of e-commerce, efficient and reliable packaging is crucial for ensuring that products reach customers in perfect condition. Amazon packaging material online offers a wide range of solutions to meet various packaging needs. This comprehensive guide explores the different types of packaging materials available on Amazon, their uses, benefits, and tips for selecting the right materials for your business.
**Types of Amazon Packaging Material
1. Cardboard Boxes**
Cardboard boxes are the most common type of packaging material available on Amazon. They come in various sizes and strengths, including standard corrugated boxes, multi-depth boxes, and heavy-duty boxes. Cardboard boxes are ideal for shipping a wide range of products, providing durability and protection.
**2. Bubble Wrap
**Bubble wrap is a versatile [buy packaging material online](https://avonpackaging.com/) used to cushion and protect fragile items during shipping. Available in rolls or sheets, bubble wrap offers excellent shock absorption, preventing damage from impacts and vibrations.
**3. Packing Paper
**Packing paper is an eco-friendly option for wrapping and protecting items. It is typically used to fill voids in boxes, preventing movement and providing a layer of protection against scratches and abrasions. Packing paper is available in various weights and sizes.
**4. Packing Peanuts
**Packing peanuts are lightweight, foam-based materials used to fill empty spaces in boxes. They provide excellent cushioning and are available in biodegradable options, making them a more sustainable choice for businesses.
**5. Stretch Wrap
**Stretch wrap is a plastic film used to secure and stabilize pallet loads. It is also used to bundle items together and protect them from dust and moisture. Stretch wrap is available in different gauges and widths to suit various applications.
**6. Poly Mailers
**Poly mailers are lightweight, durable, and waterproof mailing bags. They are ideal for shipping clothing, soft goods, and other non-fragile items. Poly mailers are available in various sizes and can be customized with branding.
**7. Tape
**Tape is essential for sealing boxes and securing packages. Amazon offers a variety of tape types, including standard packing tape, reinforced tape, and water-activated tape. Each type has its own benefits and is suited for different packaging needs.
**8. Labels and Stickers
**Labels and stickers are used for addressing packages, providing handling instructions, and adding branding elements. They are available in various sizes, materials, and adhesive strengths to meet different packaging requirements.
**Uses of Amazon Packaging Material
1. Protecting Products**
The primary use of packaging materials is to protect products during transit. Cardboard boxes, bubble wrap, packing paper, and packing peanuts provide cushioning and shock absorption, preventing damage from impacts and handling.
**2. Enhancing Brand Presentation
**Custom packaging materials, such as branded poly mailers and printed tape, enhance the presentation of products and reinforce brand identity. They create a memorable unboxing experience for customers and promote brand recognition.
**3. Organizing and Securing Shipments
**Stretch wrap and tape are used to organize and secure shipments, ensuring that items remain together and stable during transportation. Labels and stickers provide clear identification and handling instructions, streamlining the shipping process.
**4. Reducing Environmental Impact
**Eco-friendly packaging materials, such as biodegradable packing peanuts and recyclable packing paper, help businesses reduce their environmental footprint. Using sustainable materials appeals to eco-conscious consumers and supports responsible business practices.
**Benefits of Using Amazon Packaging Material
1. Wide Variety**
Amazon offers a wide variety of packaging materials to suit different needs. From standard cardboard boxes to specialized materials like stretch wrap and poly mailers, businesses can find everything they need in one place.
**2. Convenience
**Purchasing packaging materials online from Amazon is convenient and time-saving. Businesses can easily compare options, read reviews, and place orders from the comfort of their office or home.
**3. Quality and Reliability
**Amazon’s selection of packaging materials includes products from trusted brands known for their quality and reliability. This ensures that businesses receive materials that meet their packaging standards and protect their products effectively.
**4. Competitive Pricing
**Amazon offers competitive pricing on packaging materials, allowing businesses to find cost-effective solutions without compromising on quality. Bulk purchasing options are also available for added savings.
**5. Sustainability
**With a growing range of eco-friendly packaging materials, Amazon helps businesses adopt sustainable practices. Choosing biodegradable, recyclable, and compostable options supports environmental conservation and reduces waste.
**Tips for Selecting the Right Amazon Packaging Material
****1. Assess Your Packaging Needs
**Evaluate the types of products you ship, their fragility, and the shipping conditions they will encounter. This will help you determine the appropriate materials and packaging methods to ensure maximum protection.
**2. Consider Customization
**If branding is important, look for customizable packaging materials. Printed tape, branded poly mailers, and custom labels can enhance brand visibility and create a professional appearance.
**3. Opt for Eco-Friendly Options
**Choose eco-friendly packaging materials to align with sustainable business practices. Look for certifications and labels that indicate the materials’ environmental credentials.
**4. Check for Quality and Durability
**Ensure that the packaging materials you select are of high quality and durable. Read reviews and product descriptions carefully to make informed decisions.
**5. Balance Cost and Quality
**While it’s important to find cost-effective solutions, don’t compromise on quality. Investing in reliable packaging materials can prevent product damage, reduce returns, and enhance customer satisfaction.
**Conclusion
**[amazon packaging material online](https://avonpackaging.com/) provide a comprehensive range of solutions for businesses looking to secure, protect, and present their products effectively. With a variety of options available, from standard cardboard boxes to eco-friendly packing peanuts, businesses can find the right materials to meet their specific needs. By understanding the types, uses, and benefits of these packaging materials, businesses can make informed decisions that enhance their packaging strategies and contribute to a positive customer experience. | avonpackaging |
1,878,971 | My Programming Journey so far …. | My Programming Journey so far: The HTML Adventure Begins!…… Hey there, fellow tech brothers and... | 0 | 2024-06-06T08:37:03 | https://dev.to/marvin_omokaro_/my-programming-journey-so-far--1g79 | webdev, programming, devops, css | My Programming Journey so far: The HTML Adventure Begins!……
Hey there, fellow tech brothers and sisters! I'm excited to share my programming journey with you, and where better to start than the beginning? I've been diving into web development, and my first stop is HTML.
So far, I've learned some fantastic fundamentals that have opened my eyes to the world of web dev. Let me take you through my HTML highlights reel!
First up, I discovered how to link CSS to my HTML files. This was a game-changer! I realized how to separate my presentation from my content, making my code more organized and efficient.
Next, I dived into the world of HTML images. I learned how to add images to my web pages, making them more visually appealing. Who doesn't love a good image, right?. I used my a picture of mine when I was little as my first HTML image.
Then, I tackled table elements and styling. I learned how to create tables, add borders, and even style them with CSS. It's amazing how much of a difference a well-designed table can make!
Display properties were next on my list. I learned how to control the layout of my web pages using display types like block, inline, and none. It's incredible how much flexibility this gives me!
HTML classes and IDs were another exciting discovery. I realized how to target specific elements and apply styles or functionality to them. This has opened up a world of possibilities for me!
Iframes were another new concept I explored. I learned how to embed external content into my web pages, like videos or maps. It's amazing how much functionality this adds!
Semantic elements were a revelation! I learned how to use elements like header, footer, and nav to give my web pages meaning and structure. This has made my code more readable and accessible.
Forms, labels, and selects were next on my agenda. I learned how to create interactive forms that users can engage with. It's incredible how much power this gives me to collect user input!
Lastly, I delved into HTML input attributes. I learned how to customize my form inputs with attributes like placeholder text, required fields, and more. It's amazing how much flexibility this adds to my forms!
That's my HTML journey so far! I'm excited to continue learning and exploring the world of web development. Stay tuned for my next update, where I'll share my adventures in CSS and beyond!
| marvin_omokaro_ |
1,878,945 | Feign Client | Feign Client, Netflix tarafından geliştirilen ve Spring Cloud ile entegrasyon içinde sıkça kullanılan... | 0 | 2024-06-06T08:15:38 | https://dev.to/mustafacam/feign-client-3anj | **Feign Client**, Netflix tarafından geliştirilen ve Spring Cloud ile entegrasyon içinde sıkça kullanılan bir HTTP istemci kütüphanesidir. Feign, HTTP API çağrılarını kolaylaştırmak için basit ve sezgisel bir yaklaşım sunar. RESTful web servisleri ile etkileşim kurmak için kullanılan Feign, HTTP istemci kodunu büyük ölçüde azaltır ve daha temiz, daha bakımı kolay bir kod yazmayı sağlar.
### Feign Client Kullanımı
#### 1. Feign Bağımlılıklarını Ekleyin
`pom.xml` dosyanıza aşağıdaki bağımlılıkları ekleyin:
```xml
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
```
#### 2. Feign Client'ı Etkinleştirin
Ana uygulama sınıfınıza `@EnableFeignClients` anotasyonunu ekleyin:
```java
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.openfeign.EnableFeignClients;
@SpringBootApplication
@EnableFeignClients
public class KitapyurdumServiceApplication {
public static void main(String[] args) {
SpringApplication.run(KitapyurdumServiceApplication.class, args);
}
}
```
#### 3. Feign Client Arayüzünü Tanımlayın
Feignedilecek hizmet için bir arayüz oluşturun. Bu arayüz, çağrılacak HTTP yöntemlerini belirtir. Örneğin:
```java
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
@FeignClient(name = "kitap-api", url = "http://localhost:8080/api")
public interface KitapApiClient {
@GetMapping("/kitaplar/{id}")
Kitap getKitapById(@PathVariable("id") Long id);
}
```
#### 4. Feign Client'ı Kullanma
Feign Client'ı kullanarak API çağrısı yapmak için bir bileşen veya hizmet sınıfında inject edebilirsiniz:
```java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class KitapService {
private final KitapApiClient kitapApiClient;
@Autowired
public KitapService(KitapApiClient kitapApiClient) {
this.kitapApiClient = kitapApiClient;
}
public Kitap getKitap(Long id) {
return kitapApiClient.getKitapById(id);
}
}
```
### Feign Client'ın Avantajları
1. **Kolay Kullanım**: Feign Client, HTTP API'lerine kolay ve sezgisel bir şekilde erişim sağlar.
2. **Temiz Kod**: Feign, istemci tarafı kodunu büyük ölçüde azaltır ve daha temiz ve bakımı kolay bir kod yazmayı sağlar.
3. **Spring Cloud ile Entegrasyon**: Spring Cloud ile sıkı entegrasyon, Feign Client'ın Spring Boot projelerinde kolayca kullanılmasını sağlar.
4. **Deklaratif Anotasyonlar**: Feign, HTTP isteklerini tanımlamak için basit anotasyonlar kullanır, bu da geliştirme sürecini hızlandırır.
### Örnek Senaryo
Bir kitap yönetim sistemi düşünün. Başka bir hizmetten kitap bilgilerini almak istiyorsunuz. Feign Client, bu tür senaryolarda HTTP çağrılarını kolayca yapmanızı sağlar. Kitap hizmetiyle etkileşim kuran bir Feign Client tanımlayarak, HTTP isteklerini basit metod çağrıları ile gerçekleştirebilirsiniz.
Feign Client, mikroservis mimarilerinde sıkça kullanılan bir araçtır ve RESTful web servisleriyle etkileşimi büyük ölçüde basitleştirir. Bu özellikleri sayesinde, Feign Client, Spring Cloud ekosisteminde önemli bir rol oynar. | mustafacam | |
1,878,970 | Apple Shortcuts - Import & Delete Calendar Files Automation | Here is a walkthrough of how I built a shortcut to import and delete calendar files from my iCloud... | 0 | 2024-06-06T08:36:35 | https://github.com/ahandsel/articles/blob/main/calendar-import-automation/calendar-import-automation.md | applescript, ica, calendar, beginners | Here is a walkthrough of how I built a shortcut to import and delete calendar files from my iCloud calendar.
I hope this can be useful for you in building your own shortcuts or modifying this one to suit your needs.
## TL;DR
* Apple Shortcuts: [Import & Delete Calendar Files](https://www.icloud.com/shortcuts/ceb35c3d1b524af5a65b40d8bc07c598)
* Click the link above to download the Apple Shortcut to your Mac and set the folder path to your `Downloads` folder.
* Download calendar files (`.ics`) to the `Downloads` folder.
* Run the shortcut to import the events to your Apple Calendar and delete the files from the `Downloads` folder.
## Apple Shortcut's Structure
### Open the Calendar App
* Use the `Open App` action to open the Calendar app.
* The shortcut works smoother if the Calendar app is open at the start.
### Find and Get the Calendar Files
* Use the `Get Contents of Folder` action to get the files from the `Downloads` folder.
* Use the `Filter Files` action to filter the files with the `.ics` extension.
### Notify the User
* Use the `Count` action to count the number of files.
* Use the `Show Notification` action to display the number of files found.
* This gives the user an estimate of how long the import will take.
### Import the Calendar Files
* Use the `Repeat with Each` action to loop through the files.
* Use the `Open File` action to open the file (`Repeat Item`) in the Calendar app.
* Use the `Run AppleScript` action to execute the script to automate clicking the `OK` button when prompted by the Calendar app.
* The script is provided in the section below.
* End the `Repeat with Each` action.
### Delete the Calendar Files
* Repeat the steps to find and get the calendar files.
* Use the `Delete File` action to delete the files from the `Downloads` folder.
* Why duplicate the shortcut steps? For some reason, using the `Delete File` action after the `Open File` action does not work smoothly after the `Run AppleScript` action.
### Hide the Calendar App
* Use the `Hide App` action to hide the Calendar app.
## AppleScript to Automate Importing Calendar Events
This AppleScript automates the process of importing calendar events in the Calendar app on macOS. It mainly clicks the `OK` button when prompted by the Calendar app to import an event or skip already-imported events.
[calendar-event-importer.applescript](https://github.com/ahandsel/articles/blob/main/calendar-import-automation/calendar-event-importer.applescript)
```applescript
-- Script Name: Calendar Event Importer
-- Version: 1.1 - Improved script with timeout mechanism
-- Usage: Use this script to automate importing calendar events in the Calendar app on macOS.
-- Function: Check if the Calendar event window is open
on isEventWindowOpen(timeoutSeconds)
set startTime to current date
repeat until (existsEventWindow() or ((current date) - startTime) > timeoutSeconds)
delay 0.5
end repeat
return existsEventWindow()
end isEventWindowOpen
-- Function: Check if the event window exists
on existsEventWindow()
tell application "System Events"
tell process "Calendar"
if exists button "OK" of window 1 then
return true
end if
end tell
end tell
return false
end existsEventWindow
-- Main script execution
try
-- Adjust the delay as necessary to ensure the event window has time to open
delay 2
-- Set timeout period (in seconds) for event window to open
set timeoutPeriod to 10
-- Check if the event window is open within the timeout period
if isEventWindowOpen(timeoutPeriod) then
tell application "System Events"
tell process "Calendar"
click button "OK" of window 1
end tell
end tell
else
-- Event window did not open within timeoutPeriod. Skipping event.
end if
end try
```
### How to Import and Use the Apple Shortcut
This automation uses the [Shortcuts on Mac](https://support.apple.com/guide/shortcuts-mac/intro-to-shortcuts-apdf22b0444c/mac).
You can get it on your Mac by clicking on the [Import & Delete Calendar Files](https://www.icloud.com/shortcuts/ceb35c3d1b524af5a65b40d8bc07c598) link.
You will be prompted with three questions:
1. Which folder do you want to import the calendar files from? (Default: Downloads)
2. Folder path (same as above)
3. Do you want to delete the calendar files after importing them? (Default: Yes)
After answering the questions, the shortcut will be added to your Shortcuts app on your Mac.
To run the shortcut:
1. Download the calendar files (`.ics`) to the folder you specified.
2. Open the Shortcuts app and run the shortcut.
3. The events will be imported to your Apple Calendar, and the files will be deleted from the folder.
## Apple Shortcut Screenshot
 | ahandsel |
1,878,969 | Hot Wallets: The Convenience of Everyday Cryptocurrency Transactions | Hot wallets play a crucial role in the world of cryptocurrency, offering a balance between... | 0 | 2024-06-06T08:35:54 | https://dev.to/digitalmarketer/hot-wallets-the-convenience-of-everyday-cryptocurrency-transactions-2cah | Hot wallets play a crucial role in the world of cryptocurrency, offering a balance between accessibility and security for day-to-day transactions. In this **[best crypto wallet](https://ptpwallet.com)** of our series, we will explore what hot wallets are, their advantages and disadvantages, how they work, and some of the best practices for using them effectively.
What is a Hot Wallet?
A hot wallet is a type of cryptocurrency wallet that is connected to the internet, making it easily accessible for sending and receiving digital assets. Hot wallets are typically used for everyday transactions due to their convenience and ease of use. They come in various forms, including web wallets, mobile wallets, and desktop wallets.
Types of Hot Wallets
Web Wallets: These wallets are accessible through a web browser. They are convenient and can be used on any device with internet access.
Examples: MetaMask, MyEtherWallet
Mobile Wallets: These are applications installed on a smartphone, providing quick access to cryptocurrencies on the go.
Examples: Trust Wallet, Coinbase Wallet
Desktop Wallets: These are software applications installed on a personal computer, offering robust features and greater control over security.
Examples: Exodus, Electrum
How Hot Wallets Work
Hot wallets store private keys online, allowing users to quickly access their funds and make transactions. The process of using a hot wallet typically involves:
Creating an Account: Users set up a hot wallet by creating an account and generating a private key.
Managing Funds: Users can store, send, and receive cryptocurrency through the wallet’s interface.
Conducting Transactions: Transactions are signed with the private key and broadcasted to the blockchain for confirmation.
Advantages of Hot Wallets
Accessibility: Hot wallets provide instant access to funds, making them ideal for everyday use and frequent transactions.
User-Friendly: Most hot wallets are designed with ease of use in mind, featuring intuitive interfaces and straightforward setup processes.
Integration with Exchanges: Many hot wallets are integrated with cryptocurrency exchanges, enabling seamless trading and asset management.
Additional Features: Some hot wallets offer features like in-wallet exchanges, staking, and interaction with decentralized applications (dApps).
Disadvantages of Hot Wallets
Security Risks: Because they are connected to the internet, hot wallets are more susceptible to hacking, phishing, and malware attacks.
Less Control: Users must trust the wallet provider's security measures, which can vary in reliability.
Potential for Loss: If a user’s device is compromised or lost, they risk losing access to their funds, especially if backups are not properly maintained.
Best Practices for Using Hot Wallets
Enable Two-Factor Authentication (2FA): Adding 2FA provides an extra layer of security, reducing the risk of unauthorized access.
Use Strong, Unique Passwords: Ensure that your wallet password is strong and unique, and avoid reusing passwords across different platforms.
Regular Backups: Regularly back up your wallet’s private keys or recovery seed phrases and store them securely.
Keep Software Updated: Ensure that your wallet software is up to date with the latest security patches and features.
Be Cautious of Phishing Scams: Always verify the authenticity of wallet websites and applications. Avoid clicking on suspicious links or downloading software from untrusted sources.
Popular Hot Wallets
MetaMask: A widely used web and mobile wallet that supports Ethereum and ERC-20 tokens, with robust security features and integration with dApps.
Trust Wallet: A mobile wallet backed by Binance, supporting a wide range of cryptocurrencies and offering staking and DeFi integration.
Exodus: A desktop and mobile wallet known for its user-friendly interface, supporting multiple cryptocurrencies and offering an integrated exchange.
Coinbase Wallet: A mobile wallet that allows users to manage their private keys and interact with dApps, providing a seamless connection to the Coinbase exchange.
Hot Wallets vs. Cold Wallets
Security: Cold wallets offer higher security by keeping private keys offline, while hot wallets are more vulnerable to online threats.
Accessibility: Hot wallets provide quick and easy access to funds, making them suitable for frequent transactions. Cold wallets are better for long-term storage and large amounts of cryptocurrency.
Convenience: Hot wallets are generally more convenient for everyday use, while cold wallets require more effort to set up and use for transactions.
Conclusion
Hot wallets are essential tools for anyone involved in the daily use of cryptocurrency, offering a convenient and user-friendly way to manage digital assets. While they provide greater accessibility, it is important to follow best security practices to mitigate the risks associated with online storage. By balancing the use of hot and cold wallets, users can achieve both convenience and security in their cryptocurrency management.
This concludes our ten-article series on crypto wallets. We hope this comprehensive guide has provided valuable insights and knowledge to help you make informed decisions about managing your cryptocurrency. Thank you for reading, and stay secure in your crypto endeavors! | digitalmarketer | |
1,878,967 | What are the typical profit margins for successful crypto trading bots? | Introduction Trading bots have become incredibly useful tools in the constantly changing... | 0 | 2024-06-06T08:33:22 | https://dev.to/josephinesaro/what-are-the-typical-profit-margins-for-successful-crypto-trading-bots-24ja | cryptocurrency, trading, blockchain, bot |
**Introduction**
Trading bots have become incredibly useful tools in the constantly changing cryptocurrency space, enabling traders to automate their tactics and take advantage of opportunities in the market as they arise. The goal of these bots is to minimize human mistakes and emotional decision-making while maximizing profits by executing trades according to predefined parameters. Anyone thinking about using these trading bots has to understand their profit margins because they provide light on their possible performance and possible rewards. This blog will explore the usual profit margins for profitable [cryptocurrency trading bots](https://www.kryptobees.com/crypto-trading-bot-development-company), looking at a range of contributing factors, expenses, and real-world instances.
**Understanding Crypto Trading Bots**
Software programs known as "crypto trading bots" that communicate with cryptocurrency exchanges to make purchases or sell orders on users' behalf.
They allow traders to automate their methods because they function according to a predefined set of rules and algorithms. Trading bots come in several forms, such as:
- Arbitrage Bots: These bots exploit price differences between different exchanges to generate profit.
- Market-Making Bots: They create buy-and-sell orders to profit from the bid-ask spread.
- Trend-Following Bots: These bots execute trades using market trends, such as momentum indicators and moving averages.
- Factors Influencing Profit Margins
- The profitability of a crypto trading bot is influenced by various factors, including:
- Market Conditions: The performance of a bot can be significantly impacted by the degree of market movement.
In markets with high fluctuation, where price swings offer greater profit potential, bots typically outperform human traders.
- Trading Strategies: Different profit margins may result from the bot's use of particular methods like arbitrage, swing trading, or scalping.
- Algorithm Quality: In order for the bot to recognize and carry out profitable trades, its algorithm's complexity and effectiveness are critical factors.
- Trade Frequency and Volume: Increased exposure to market risks and transaction costs can result from increased trade volume and frequency, even though they can also boost profitability.
**Measuring Profitability**
To evaluate the profitability of a trading bot, traders typically look at several key metrics:
- Return on Investment (ROI): In relation to the initial investment, this gauges profitability.
- Net Profit: The entire profit following the subtraction of all expenses, such as trading commissions and operating costs.
- Win Rate: The percentage of profitable transactions made by the bot out of all the trades it executed.
Before implementing the bot in live trading, backtesting which involves testing the bot against past market data is a popular technique used to assess potential profitability. However, real-world performance data is necessary for a thorough assessment.
**Typical Profit Margins**
Profit margins for profitable cryptocurrency trading bots might differ significantly. Many bots typically aim for monthly returns in the range of 1% to 5%, while some may do better based on the state of the market and how well the trading strategy works. It is imperative to acknowledge that although these margins may seem appealing, there is no assurance of them, and historical performance is not always indicative of future outcomes. These profit margins are influenced by a number of factors, including the degree of market competition, the bot's capacity to quickly adjust to changes in the market, and the effectiveness of the trading algorithms.
**Costs and Fees Impacting Profitability**
Several costs and fees can impact the profitability of a trading bot, including:
- Trading Fees: Exchanges charge fees for executing trades, which may reduce profit margins, especially for high-frequency trading bots.
- Operational Costs: These include server fees and software subscription charges for the bot, as well as any expenses related to operating and maintaining the bot.
- Exchange Fees: Certain exchanges may impose extra fees for deposits and withdrawals in addition to trading fees.
- Hidden Costs: Movement, which happens when a trade is executed at a different price than expected because of market volatility, is one example of this.
**Risks and Challenges**
While crypto trading bots offer the potential for profit, they also come with several risks and challenges:
- Market Risks: Major losses may result from sudden changes in the market environment, such as news stories or changes in regulations.
- Technical Risks: Software errors or bugs in the bot may cause losses and unpredictable trading behavior.
- Regulatory Risks: Trading activity may be impacted by modifications to laws or the legal standing of cryptocurrencies in various regions.
- Security Risks: Insufficiently secured bots are susceptible to cyberattacks and other security risks.
**Maximizing Profit Margins**
To maximize the profit margins of a crypto trading bot, traders can take several steps:
- Optimize Bot Performance: Keep an eye on the bot's settings and adjust them as needed to accommodate shifting market conditions.
- Use Advanced Features: AI and machine learning should be used to enhance the bot's decision-making.
- Diversify Strategies: To disperse risk and seize more opportunities, combine various trading methods and pairs.
- Continuous Learning: To continuously improve trading techniques, keep up with both technological advancements and market trends.
**Real-Life Success Stories**
Several crypto trading bots have earned reputations for delivering impressive profit margins. For example, HaasOnline, renowned for its intricate features and advanced algorithms, has claimed significant profits for numerous consumers. Similar to this, 3Commas has assisted traders in making large profits thanks to its simple interface and innovative trading techniques. During an interview, a proficient bot trader shared that their success was mostly due to fundamental techniques including thorough backtesting, regular monitoring, and strategy optimization. These real-world examples demonstrate how technology developments combined with smart implementation may produce positive outcomes in the unpredictable cryptocurrency market, underscoring the potential for huge profits when deploying well-designed and effectively managed trading bots.
**Conclusion**
[Crypto trading bot development](https://www.kryptobees.com/crypto-trading-bot-development-company) offer a promising avenue for automating trading strategies and potentially achieving attractive profit margins. Making smart selections, however, requires an awareness of the variables that affect profitability, the related risks, and the expenses. Successful bots can have monthly profit margins of anything from 1% to 5%, but getting there needs careful design, ongoing oversight, and efficient risk management. Traders can improve their overall trading performance and optimize their bots' profit margins by utilizing advanced features and diverse techniques.
| josephinesaro |
1,878,966 | Puppet 8 readiness with Onceover | Puppet 8 has been released, with it comes security enhancements, the dropping of deprecated features,... | 0 | 2024-06-06T08:29:15 | https://dev.to/puppet/puppet-8-readiness-with-onceover-135f | puppet |
Puppet 8 has been released, with it comes security enhancements, the dropping of deprecated features, and performance improvements, you can read more about Puppet 8 on this [blog post](https://www.puppet.com/blog/puppet-8).
In this blog post, well look at how you can take your existing Puppet 7 code and use [Onceover](https://github.com/voxpupuli/onceover), a free testing tool, to test it against Puppet 8 to prepare for your migration.
## Puppet 8
Of the many changes to Puppet 8, a few will have a direct impact on your current Puppet code.
Strict mode will now be enforced, for example, in Puppet 7 you could add a string to an integer, `"1" + 1`, this will now fail.
Legacy facts, which have been deprecated for some time, have been removed.
Hiera 3 has also been removed.
## Onceover
The simple question we want to answer is "will my Puppet 7 code compile into a catalog on Puppet 8" and for that, [Onceover](https://github.com/voxpupuli/onceover) is the perfect tool. If you haven't used [Onceover](https://github.com/voxpupuli/onceover) before, it's a stand alone tool that you can run on any machine, and test that the roles and profiles in your control-repo will compile into catalogs.
### Install Ruby 3
The first thing we'll need to do is install Ruby 3, it's a requirement of Puppet 8. Follow these steps to install it [Installing Ruby](https://www.ruby-lang.org/en/documentation/installation/).
If you're on your own workstation you may want to consider using [rbenv](https://github.com/rbenv/rbenv) to allow you to quickly switch between versions of Ruby that your other project may depend upon.
### Install Onceover
The first step in installing [Onceover](https://github.com/voxpupuli/onceover) is to clone your control-repo onto your system.
Then install bundler `gem install bundler`; this is required to read the Gemfile we'll produce in the next step to install the required Gems.
In the root of your control-repo create a Gemfile, this specifies the main Gems we want to install and their versions. If you wanted to use a different version of Puppet, just change the version in the Gemfile. If you host Gems internally such as Artifactory, you can specify the source in here too.
```
# Gemfile
source "https://rubygems.org"
gem 'puppet', '~> 8.4'
gem 'onceover', '~> 3.22'
```
Run `bundle install` to install all the gems and their dependencies.
Run `bundle exec onceover init` to initialise the control-repo, one of the things this does is create the .onceover directory and puts the [Onceover](https://github.com/voxpupuli/onceover) config file, onceover.yaml, into the spec directory.
### Run a test
To keep things simple, my control-repo contains one role.
```
# site-modules/role/manifests/example.pp
class role::example {
include profile::coercion.pp
}
```
And that role will contain one profile, this profile contains some code that would compile a catalog under Puppet 7, but not under Puppet 8.
```
# site-modules/profile/manifests/coercion.pp
class profile::coercion {
$result = '1' + 1
}
```
The last job is to modify the [Onceover](https://github.com/voxpupuli/onceover) configutation file, to keep this simple I just want it to compile the example role on Ubuntu 20.04.
```
classes:
- role::example
nodes:
- Ubuntu-20.04-64
node_groups:
non_windows_nodes:
- Ubuntu-20.04-64
test_matrix:
- all_nodes:
classes: 'all_classes'
tests: 'spec'
```
Finaly, to run the test, run `onceover run spec`.
This will return the following error, which is expected, as Puppet 8 enforces [strict mode](https://www.puppet.com/docs/puppet/8/upgrading-from-puppet7-to-puppet8.html#upgrading-from-puppet7-to-puppet8-legacy-strict-mode) on coercion.
```
role::example: F
role::example: failed
errors:
Evaluation Error: The string '1' was automatically coerced to the numerical value 1
file: site-modules/profile/manifests/coercion.pp
line: 3
column: 13
factsets: Ubuntu-20.04-64
```
### Refactor our code and rerun the test
The error is reasonably clear, we provided a string and it was used as an integer. Lets fix that code!
```
# site-modules/profile/manifests/coercion.pp
class profile::coercion {
$result = 1 + 1
}
```
The result is a pass!
```
role::example: P
```
## Conclusion
Using [Onceover](https://github.com/voxpupuli/onceover) and the Puppet 8 Gem, we can quickly detect code that will not work on Puppet 8 and we can do this on a test machine or laptop, well away from our Puppet servers and production environment.
## A note on Continuous Delivery for Puppet Enterprise (CD4PE)
If you're using [Continuous Delivery](https://help.puppet.com/cdpe/) you're probably already using [Onceover](https://github.com/voxpupuli/onceover) on the [puppet-dev-tools:4.x](https://hub.docker.com/r/puppet/puppet-dev-tools/tags) container that ships with [Continuous Delivery](https://help.puppet.com/cdpe/). To start testing against Puppet 8, duplicate the [Onceover](https://github.com/voxpupuli/onceover) job you're already running, but change the Docker container it uses to [puppet-dev-tools:puppet8](https://hub.docker.com/layers/puppet/puppet-dev-tools/puppet8/images/sha256-6da1c6cdde55a3b174a6042b0e724ce0340d146f616e4ea1853aee78d4e87677?context=explore) | 16c7x |
1,878,962 | Welcome to My Journey: From Career Change to Ruby Developer | Hello everyone and welcome to my blog! I’m thrilled to have you here as I share my journey of... | 27,731 | 2024-06-06T08:27:59 | https://dev.to/palak/welcome-to-my-journey-from-career-change-to-ruby-developer-1a3e | career, learning, watercooler, beginners | Hello everyone and welcome to my blog! I’m thrilled to have you here as I share my journey of changing careers and becoming a Ruby developer. This blog will cover various topics related to my experiences, the lessons I’ve learned, and tips for anyone looking to embark on a similar path.
## What to Expect
In the upcoming posts, I’ll be discussing a range of topics, including:
- **The Reason Behind My Career Change:** Why I decided to leave my previous job and pursue programming.
- **Choosing Ruby:** What made me choose Ruby as my primary programming language.
- **Learning to Program:** The resources and methods I used to teach myself coding.
- **The Role of Mentorship:** How mentors played a crucial role in my development and success.
- **Conference Highlights:** My experience meeting tech celebrities at a conference on my first day of employment.
- **Overcoming Challenges:** How I handled being laid off and quickly found a new job.
- **Career Growth:** Doubling my salary as a junior developer and the strategies that helped me achieve this.
- **Embracing Opportunities:** The importance of recognizing and seizing opportunities as they come.
I’m excited to share more about my journey, the technical challenges I encounter, and the strategies that help me overcome them. Whether you’re considering a career change or are already on your path to becoming a developer, I hope my experiences and insights will inspire and guide you.
Thank you for reading, and I look forward to embarking on this adventure together. Stay tuned for more posts!
Feel free to leave comments or questions below. I’d love to hear from you and engage in meaningful discussions about career changes, programming, and everything in between.
Happy coding!
Mati | palak |
1,877,289 | How to Implement Refresh Tokens with Token Rotation in NestJS | In this episode, we will learn how to implement refresh tokens using local storage as a strategy for... | 0 | 2024-06-06T08:27:20 | https://dev.to/zenstok/how-to-implement-refresh-tokens-with-token-rotation-in-nestjs-1deg | webdev, javascript, node, nestjs | In this episode, we will learn how to implement refresh tokens using local storage as a strategy for storing both access and refresh tokens. If you want to jump directly to the GitHub repo, you can [access it here](https://github.com/zenstok/nestjs-auth-refresh-token-example).
### Prerequisites
Before diving into this guide, it's important to have some experience with NestJS and the implementation of Passport strategies in NestJS. If you're not familiar with these topics, please visit the following articles from the NestJS documentation:
- [Passport Integration](https://docs.nestjs.com/recipes/passport)
### Why Do We Use Refresh Tokens?
Even though we use HTTPS to encrypt network traffic, there are additional steps we can take to prevent malicious users from stealing access tokens through methods like social engineering or library hacks. Refresh tokens allow a user to stay logged in for a long time without needing to log in again, provided they are active users. We can log them out after a set period, such as six months, if they have been inactive.
Why use refresh tokens instead of a single access token with a long or no expiration date? Because we want to counter token theft with short-lived access tokens, so attackers are likely to obtain expired tokens. Additionally, refresh tokens can provide a way to revoke user access without resetting the JWT signing key and logging out all users.
### Implementation Overview
When we log in for the first time, we receive a token pair that includes an access token and a refresh token. As the access token approaches expiration, we can obtain a new token pair by requesting a new set of tokens from our authentication server. The server will provide the new token pair only if the refresh token is provided.
Why do you think I mentioned receiving a new token pair consisting of both access token and refresh token? If I have the refresh token with a long expiration date, wouldn't it have been sufficient to just get a new access token? Well, storing the refresh token with long expiration date invalidates the logic that hackers obtain short-lived tokens that are likely to be expired. Furthermore, this approach eliminates the possibility of implementing the 'permanently logged in' users feature, even if they are active. So, what we do is when we request a new token pair, we immediately invalidate the previous refresh token through a mechanism called refresh token rotation.
### Refresh Token Rotation
Refresh token rotation operates by generating a blacklist which will "force invalidate" previously used refresh tokens. When a new token pair is requested, we utilize a refresh token and then include this used refresh token in our blacklist. This means that if a hacker gains control of a refresh token, it will already be invalid if the user has refreshed their token pair.
But what if the hacker gets a fresh, valid refresh token? You've got two options: if you spot the hack right away, though that's unlikely, you can quickly get a new token pair to make the hacker's refresh token worthless. If the hacker uses your refresh token and it's marked invalid, there's not much you can do. They might have access to your app indefinitely until you change the JWT signing key. To stop this, we can store the refresh token in an HTTP-only cookie and guard against CSRF attacks. That way, even if your app has XSS vulnerabilities, the hacker can't read the refresh token. If you're interested in an article about storing refresh tokens in HTTP-only cookies, leave a comment, and I'll get right on it.
### Getting Started
For this article, we'll focus on the core logic and keep the app simple.
Clone the project from GitHub and start the Docker containers:
```sh
yarn dc up
```
Pre-fill your database with two users:
```sh
yarn dc-db-init
```
Access Swagger at `localhost:3000/docs` to log in. For the admin user, use:
Email: admin@admin.com
Password: 1234
Our app allows refreshing the token pair by calling the `/refresh-tokens` endpoint. When called with a refresh token as bearer auth, it invalidates the previous token. Try calling the endpoint twice with the same token to see the `401 Unauthorized error` on the second call.
The core logic is in the authentication module. We have three guards:
- **Local Auth Guard**: For initial authentication with email and password.
- **JWT Auth Guard**: Protects all app routes globally, defined as an `APP_GUARD` in `app.module.ts`, uses access token for validation.
- **JWT Refresh Auth Guard**: Guards the `/refresh-tokens endpoint`, uses refresh token for validation.
The critical aspect here is the interaction between access tokens and refresh tokens, so I'll skip discussing the local auth guard. For the JWT auth guard, we utilize the JWT strategy from the `'passport-jwt'` package.
In the following section, we define how to extract the JWT from the request and the JWT signature key, which we set in the environment. In the validate method, we receive the payload of the JWT, which we use to retrieve the user ID and verify if the user exists in the database before granting access if true.
```typescript
export class JwtStrategy extends PassportStrategy(Strategy) {
constructor(
private userService: UserService,
configService: ConfigService<EnvironmentVariables>,
) {
super({
jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
ignoreExpiration: false,
secretOrKey: configService.get('jwtSecret'),
});
}
async validate(payload: any): Promise<User | null> {
const authUser = await this.userService.findOne(payload.sub);
if (!authUser) {
throw new UnauthorizedException();
}
return authUser;
}
}
```
Similarly, for the JWT refresh auth guard, we employ the same JWT strategy from the `'passport-jwt'` package. The distinction here from the JWT strategy file is that we utilize a different secret key for JWT token generation, and we return both the user attributes and the refresh token expiration date. This expiration date becomes necessary later in the process.
```typescript
@Injectable()
export class JwtRefreshStrategy extends PassportStrategy(Strategy, 'jwt-refresh') {
constructor(
private userService: UserService,
configService: ConfigService<EnvironmentVariables>,
) {
super({
jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
ignoreExpiration: false,
secretOrKey: configService.get('jwtRefreshSecret'),
});
}
async validate(payload: any) {
const authUser = await this.userService.findOne(payload.sub);
if (!authUser) {
throw new UnauthorizedException();
}
return {
attributes: authUser,
refreshTokenExpiresAt: new Date(payload.exp * 1000),
};
}
}
```
In the authentication.controller's login method, we observe that we call the login method, which, in turn, invokes the generateTokenPair from our `AuthRefreshTokenService`. It's important to note that we also implement a throttle mechanism to limit the number of requests on the login route, thereby preventing brute force attacks, with a maximum of 2 requests per second and a maximum of 5 login attempts per 60 seconds.
```typescript
@Throttle({ short: { limit: 2, ttl: 1000 }, long: { limit: 5, ttl: 60000 } })
@ApiBody({ type: UserLoginDto })
@Public()
@UseGuards(LocalAuthGuard)
@Post('login')
login(@Request() req: any) {
return this.authenticationService.login(req.user);
}
```
From within authentication service:
```typescript
login(user: User) {
return this.authRefreshTokenService.generateTokenPair(user);
}
```
The auth.refresh.token.service.ts looks like this:
```typescript
export class AuthRefreshTokenService {
constructor(
private jwtService: JwtService,
private configService: ConfigService<EnvironmentVariables>,
@InjectRepository(AuthRefreshToken)
private authRefreshTokenRepository: Repository<AuthRefreshToken>,
) {}
async generateRefreshToken(authUserId: number, currentRefreshToken?: string, currentRefreshTokenExpiresAt?: Date) {
const newRefreshToken = this.jwtService.sign(
{ sub: authUserId },
{ secret: this.configService.get('jwtRefreshSecret'), expiresIn: '30d' },
);
if (currentRefreshToken && currentRefreshTokenExpiresAt) {
if (await this.isRefreshTokenBlackListed(currentRefreshToken, authUserId)) {
throw new UnauthorizedException('Invalid refresh token.');
}
await this.authRefreshTokenRepository.insert({
refreshToken: currentRefreshToken,
expiresAt: currentRefreshTokenExpiresAt,
userId: authUserId,
});
}
return newRefreshToken;
}
private isRefreshTokenBlackListed(refreshToken: string, userId: number) {
return this.authRefreshTokenRepository.existsBy({ refreshToken, userId });
}
async generateTokenPair(user: User, currentRefreshToken?: string, currentRefreshTokenExpiresAt?: Date) {
const payload = { email: user.email, sub: user.id };
return {
access_token: this.jwtService.sign(payload),
refresh_token: await this.generateRefreshToken(user.id, currentRefreshToken, currentRefreshTokenExpiresAt),
};
}
@Cron(CronExpression.EVERY_DAY_AT_6AM)
async clearExpiredRefreshTokens() {
await this.authRefreshTokenRepository.delete({ expiresAt: LessThanOrEqual(new Date()) });
}
}
```
Looking at `generateRefreshToken` method, we generate a new refresh token with a 30-days expiration. If we don't receive the optional currentRefreshToken and currentRefreshTokenExpiresAt parameters, we simply return the newly created refresh token, as expected after a successful login.
Examining the `refreshTokens` method below in the authentication controller, we notice the implementation of a throttle mechanism: a maximum of 1 request per second or 2 requests per 60 seconds. We invoke generateTokenPair with user attributes, the used refresh token, and its expiration date:
```typescript
@Throttle({
short: { limit: 1, ttl: 1000 },
long: { limit: 2, ttl: 60000 },
})
@ApiBearerAuth()
@Public()
@UseGuards(JwtRefreshAuthGuard)
@Post('refresh-tokens')
refreshTokens(@Request() req: ExpressRequest) {
if (!req.user) {
throw new InternalServerErrorException();
}
return this.authRefreshTokenService.generateTokenPair(
(req.user as any).attributes,
req.headers.authorization?.split(' ')[1],
(req.user as any).refreshTokenExpiresAt,
);
}
```
The `generateTokenPair` method of `AuthRefreshTokenService`, when invoked with `currentRefreshToken` and `currentRefreshTokenExpiresAt`, checks if the current token is blacklisted and throws an error if it's reused. For the first-time usage, it inserts this token into our auth refresh tokens database table, effectively acting as our blacklist.
In the final method of our service, we have a cron job responsible for deleting all refresh tokens whose expiration date has passed, as we no longer need to retain them in the database.
This is part 1 of a 3-episode series. In the next episode, I will show you how to manage access and refresh tokens easily in a React app. In episode 3, we'll delve deeper into storing the refresh token in an HTTP-only cookie instead of local storage. This approach prevents attackers from reading the refresh token, even if your app is vulnerable to XSS attacks.
If you'd like me to cover more interesting topics about the node.js ecosystem, feel free to leave your suggestions in the comments section. Don't forget to subscribe to my newsletter on [rabbitbyte.club](rabbitbyte.club) for updates! | zenstok |
1,878,961 | Retrieving API Fields from an Azure Static Web App Using a Bash Script | Azure Static Web Apps provide a streamlined full-stack development experience for static site... | 0 | 2024-06-06T08:26:22 | https://www.techielass.com/retrieving-api-fields-from-an-azure-static-web-app-using-a-bash-script/ | azure, bash | 
Azure Static Web Apps provide a streamlined full-stack development experience for static site hosting and serverless API endpoints. If you need to retrieve detailed configuration information about your Azure Static Web App, you can use the Azure CLI combined with a simple Bash script to automate this task.
In this blog post, I'll walk you through a Bash script that retrieves all the API fields from an Azure Static Web App.
### Prerequisites
Before running the script, ensure you have the following:
- Azure Account.
- Access to Azure Shell: You want to launch [<u>https://shell.azure.com</u>](https://shell.azure.com/?ref=techielass.com) and run the Bash console.
### The Bash Script
Below is the Bash script that retrieves all the API fields from an Azure Static Web App.
```
#!/bin/bash
# Variables
subscriptionId="<subscriptionId>"
resourceGroup="<resourceGroup>"
appName="<appName>"
apiVersion="2023-12-01"
# Get the access token using Azure CLI
echo "Retrieving access token..."
accessToken=$(az account get-access-token --query accessToken --output tsv)
if [-z "$accessToken"]; then
echo "Error: Unable to retrieve access token. Make sure you are logged in with Azure CLI."
exit 1
fi
# URL for the GET request
url="https://management.azure.com/subscriptions/${subscriptionId}/resourceGroups/${resourceGroup}/providers/Microsoft.Web/staticSites/${appName}?api-version=${apiVersion}"
echo "Making GET request to URL: $url"
# Make the GET request and store the response
response=$(curl -s -w "\nHTTP_STATUS_CODE:%{http_code}" -X GET "$url" \
-H "Authorization: Bearer $accessToken" \
-H "Content-Type: application/json")
# Extract HTTP status code from response
http_status=$(echo "$response" | tail -n1 | sed 's/.*HTTP_STATUS_CODE://')
# Extract the response body
response_body=$(echo "$response" | sed '$d')
# Check the HTTP status code
if ["$http_status" -ne 200]; then
echo "Error: Received HTTP status code $http_status"
echo "Response body: $response_body"
exit 1
fi
# Print the entire response body
echo "Response body:"
echo "$response_body" | jq .
```
## Script Explanation
Let's take a look at what each section of the script means.
**Variable Definitions** : The script starts by defining the variables 'subscriptionId', 'resourceGroup', 'appName', and 'apiVersion'. Replace the placeholders with your actual Azure subscription ID, resource group name, and app name.
**Access Token Retrieval** :
```
accessToken=$(az account get-access-token --query accessToken --output tsv)
```
The script retrieves an access token using the Azure CLI. This token is required for authentication when making API requests to Azure.
**URL Definition** :
```
url="https://management.azure.com/subscriptions/${subscriptionId}/resourceGroups/${resourceGroup}/providers/Microsoft.Web/staticSites/${appName}?api-version=${apiVersion}"
```
The script constructs the URL for the GET request using the provided subscription ID, resource group, app name, and API version.
**Making the GT Request** :
```
response=$(curl -s -w "\nHTTP_STATUS_CODE:%{http_code}" -X GET "$url" \
-H "Authorization: Bearer $accessToken" \
-H "Content-Type: application/json")
```
The script makes a GET request to the constructed URL using `curl`. The `-s` flag suppresses progress output, and `-w "\nHTTP_STATUS_CODE:%{http_code}"` appends the HTTP status code to the response.
**HTTP Status Code Handling** :
```
http_status=$(echo "$response" | tail -n1 | sed 's/.*HTTP_STATUS_CODE://')
response_body=$(echo "$response" | sed '$d')
```
The script extracts the HTTP status code and the response body from the `curl` output. If the HTTP status code is not 200, it prints an error message and exits.
**Printing the Response** :
```
echo "$response_body" | jq .
```
The script uses [jq](https://jqlang.github.io/jq/?ref=techielass.com) to pretty-print the JSON response body, which contains all the API fields of the Azure Static Web App.
### Running the Script
- Open your web browser.
- Navigate to [https://shell.azure.com/](https://shell.azure.com/?ref=techielass.com)
- Log in with your Azure account credentials.
- - If you don't have an account, you will need to create one.
_Azure Cloud Shell_
- Select the Bash environment (if prompted to choose between Bash and PowerShell).
- To create a new file to store your script in, type the following command and press Enter:
```
touch get_static_web_app_details.sh
```
_Azure Cloud Shell_
- To open the VS Code editor built into the Azure Cloud Shell, type in the following command:
```
code get_static_web_app_details.sh
```
- Copy your bash script from above into the new file you've created.
_Azure Cloud Shell_
- After pasting your script, **save the file** by using the command **Ctrl + S** (Cmd + S on Mac).
- To close VSCode and return to the Bash shell, use the command **Ctrl + Q**.
We now need to make the file executable within our environment. Type in the following command:
```
chmod +x get_static_web_app_details.sh
```
It's now time to run the script, we can do this by typing the command:
```
./get_static_web_app_details.sh
```
_Azure Cloud Shell_
### Conclusion
This Bash script provides a simple and effective way to retrieve all the API fields from your Azure Static Web App. By leveraging the Azure CLI and `curl`, you can automate the retrieval of detailed configuration information, which can be helpful for monitoring, troubleshooting, or documenting your web app's setup. | techielass |
1,878,959 | Screen LED Manufacturers: Engineering the Future of Display Technology | screenshot-1717424907896.png Screen LED Manufacturers: Engineering the Future of Display... | 0 | 2024-06-06T08:24:59 | https://dev.to/ronald_woodgo_ba03f686524/screen-led-manufacturers-engineering-the-future-of-display-technology-2gpp | design | screenshot-1717424907896.png
Screen LED Manufacturers: Engineering the Future of Display Technology
As we continually progress into the future, the technology we use advances with us too. One of the most essential innovations for modern-day living is our screens. It is through our screens that we obtain information and enjoy entertainment, which is why it is critical to invest in the best display technology. That's where Screen led comes in. We'll explore all the advantages that led screen Manufacturing offers while looking at the future of display technology.
Features of Screen LED Production:
Screen led may be the frontier of display innovation, and as such, it gives advantages which can be a few
One of many advantages will be the high-quality, sharp image shows therefore it produces
Meaning that when you are making use of things like phones, laptop computers, or televisions, you will get the absolute most display like high-definition
Furthermore, Screen LED boasts power like low, which will be a energy-saving feature like fantastic
The longevity of Screen LED displays is still another plus like huge
They keep going longer than other screen technologies, reducing the need for replacements and reducing waste like electronic
While you worry in a position to see, led display are much better than other technologies in a number of means
Innovation of Screen LED Production:
Screen LED is in charge of numerous groundbreaking innovations
The most recent innovation has been the development of curved LED displays for example
Curved screens give a far more viewing like immersive whenever viewing movies or video gaming like playing
Another impressive innovation is the Light-emitting Diode display like clear
This display technology permits pictures which can be appearance like holographic as should they truly are floating
It's a breakthrough like significant product advertising and retail as it provides ahead thinking and futuristic way of presenting items
The options are endless with Screen LED so we additionally can not wait to learn just what else the run like long
Security of Screen LED Manufacturing:
This point with regards to display technology, security is a must, and Screen LED emphasizes
LED screens are radiation-free, which means that they don't really pose any ongoing health problems to users
The reduction of radiation implies that display LED technology does not have any impacts that are undesirable user attention health
Additionally, screen LED means that are manufacturing the displays concentrate on low light like blue decreasing the chance of eye strain
This attention like safety like give make certain that clients may use Screen LED manufactured products for very long durations without fretting about their health or eye damage
Usage of Screen LED Manufacturing:
Finding out how to utilize Screen products that are LED are manufactured effortless
The point like very first fulfill is usually to make sure that your computer or device works together due to the display
When like made, all you have to do is link the screen to your unit and power it on, and you also're all set
The standard of the display image would be evident from the brief minute you power the screen on, and you should rapidly realise why Screen LED Manufacturing could be the future of display technology
Provider of Screen LED Production:
The grade of solution supplied by Screen LED manufacturers is excellent
They offer a myriad of solutions such as marketing development and research, customer service support, and solutions that are after-sales
This service like comprehensive means that their products are for the quality like most beneficial and any dilemmas you've will be swiftly solved
Their customer service is present 24/7 so that you can reach them any right time you will need support
This amount of solution is just why display screen led Manufacturing companies rise above the crowd off their display manufacturers available in the market
Quality of Screen LED Production:
The typical of Screen LED is incomparable with other display technologies available in the market
LED screens are notable for his or her colors that are vibrant hi-def, and sharpness
Furthermore, they will have a more lifespan like extended these are typically energy saving
The quality of their displays provides consumers with an exemplary watching experience across various applications, from gaming to creative work to activity like movie
In conclusion, Screen LED is the future of display technology, and it's evident with the numerous advantages it holds. From its propensity for innovation, focus on safety, simplicity of use, outstanding service quality, and noticeable screen display quality, it's likely to be the go-to product for all display technology requirements.
| ronald_woodgo_ba03f686524 |
1,878,958 | Mastering Postman: Innovative Ways to Overcome Collection Runner Limitations | API development and testing are pivotal in building resilient applications, and leveraging... | 0 | 2024-06-06T08:21:58 | https://dev.to/sattyam/mastering-postman-innovative-ways-to-overcome-collection-runner-limitations-599j | postman, postmanapi | API development and testing are pivotal in building resilient applications, and leveraging specialized tools can vastly enhance this process. In this article, we compare the capabilities of Postman and Apidog, exploring their unique features and dissecting how shifting between these platforms can optimize your API testing workflow.
### Exploring Postman’s API Testing Tools
Postman is a popular choice among developers for its user-friendly design which simplifies API implementation and testing:
- **Collections**: Grouping related API requests into collections streamlines their management and execution.
- **Collection Runner**: Facilitates the batch execution of requests, either sequentially or concurrently, supporting automated testing.
- **Variables**: Serve as placeholders that add flexibility and adaptability to requests and responses in different scenarios.
- **Examples**: Provide predefined requests and responses, illustrating endpoint functionalities clearly, and aiding in the understanding of expected results.
Interestingly, Apidog’s concept of "test scenarios" aligns closely with Postman’s Collection Runner, offering similar sequence organization and testing functionalities.
### Benefits of Transitioning to Apidog
[Apidog](https://apidog.com/) elevates API testing with enhanced features surpassing Postman’s Collection Runner:
- **Test Scenarios**: Expound upon Postman’s capabilities with additional features for thorough API request management and comprehensive reporting, which are particularly advantageous in collaborative settings.
- **Continuous Integration**: Seamlessly integrates API tests into your CI/CD pipelines, improving operational efficiency and ensuring quality control throughout the development lifecycle.
### A Step-by-Step Migration from Postman to Apidog
#### **Step 1: Export Your Postman Collection**
Locate your collection in Postman and click **"Export"** . Select **Collection v2.1** format to ensure a thorough and complete export process.
#### **Step 2: Import into Apidog**
Log into Apidog, go to the **"Settings"** tab, and choose **"Import"** . Upload the Postman collection file you exported earlier.
#### **Step 3: Configure Test Scenarios in Apidog**
Create a new test scenario within the Testing section of Apidog. Input details such as name, priority, and organize them within appropriate folders for better management.
#### **Step 4: Develop and Execute Tests**
Craft detailed test cases in Apidog. Populate them with necessary data, outline expected results, and specify pre-conditions and post-conditions for accurate test executions.
### Assessing the Benefits and Implementing Transition
By setting up your test scenarios in Apidog, the resulting insights into your API’s behavior and responses will be invaluable. This refinement will bolster your interface quality and user experience.
### Conclusion
Transitioning from Postman to Apidog offers a significant upgrade in your API testing capabilities. With its extensive feature set and intuitive interface, Apidog stands as a superior alternative, allowing developers to overcome the limitations posed by Postman’s Collection Runner. Optimal usage of these platforms can contribute to creating effective, reliable, and scalable API solutions, ensuring robust performance and a seamless integration into development cycles.
By thoughtfully leveraging these tools, development teams can guarantee their API solutions are both dependable and highly scalable. | sattyam |
1,878,957 | Why Rust? | 2D, 3D and more? These are Rust Game Engines. Why Choose Rust? Rust, originally developed... | 0 | 2024-06-06T08:21:46 | https://dev.to/zoltan_fehervari_52b16d1d/why-rust-2289 | rust, gamedev, gamengines, programming | 2D, 3D and more? These are Rust Game Engines.
## **Why Choose Rust?**
Rust, originally developed by Mozilla and now maintained by an active open-source community, is a low-level programming language that offers exceptional control over hardware and performance. Its standout feature is memory safety, achieved through an ownership and borrowing system that eliminates the need for a garbage collector. This makes Rust an excellent choice for game development, ensuring high performance and stability without memory leaks.
## **Rust in Game Development**
The [Rust game engines'](https://bluebirdinternational.com/rust-game-engines/) popularity in game development is due to its speed, safety, and efficient memory management. These attributes are vital for creating high-performance games with robust code, minimizing bugs and crashes. Rust’s low-level control enables optimized code, essential for smooth gameplay and impressive graphics.
**
## Top Rust Game Engines
**
Amethyst
Features: Multi-threading, data-oriented design, high-level API, ECS architecture.
Strengths: Excellent for graphics, audio, input handling, and performance optimization.
Bevy
Features: Lightweight, user-friendly, modular design.
Strengths: Ease of use, fast performance, strong community support.
Fyrox
Features: Advanced 3D graphics, high-performance rendering, efficient memory management.
Strengths: Ideal for visually stunning games and advanced rendering techniques.
Piston
Features: Modular design, low-level API.
Strengths: Highly customizable, active community, simplicity for 2D games.
Nannou
Features: Creative coding, multimedia experiences.
Strengths: Cross-platform support, ideal for artistic and multimedia projects.
## 2D Game Engines in Rust
Amethyst
Uses ECS architecture and offers tools for graphics, audio, and input handling.
GGEZ
Lightweight and built on SDL2, perfect for beginners due to its simplicity.
Piston
Highly customizable with a low-level API, suitable for developers with specific requirements.
## 3D Game Engines in Rust
Amethyst
Supports physics simulation, networking, and procedural generation.
Fyrox
Focuses on advanced 3D graphics and rendering capabilities.
Bevy
Offers simplicity and flexibility with a clean syntax, suitable for various projects.
GGEZ
Primarily for 2D, but supports simple 3D development.
Piston
Modular with support for both 2D and 3D development, including a built-in game editor.
## Rust Game Engine Libraries and Frameworks
Graphics: Gfx provides low-level rendering control.
Input Handling: Gilrs offers a unified interface for input events.
Audio: Rodio simplifies sound playback; CPAL allows for advanced audio stream manipulation.
Physics: NPhysics and Rapier provide tools for simulating physical phenomena.
## Advantages of Using Rust Game Engines
Speed: Low-level control allows for optimized performance.
Memory Safety: Prevents common errors like null pointers.
Low-Level Control: Customizable for specific hardware configurations.
Concurrency: Efficiently handles multiple tasks, making games scalable.
## Getting Started with Rust Game Engines
Install Rust: Follow the installation guide on the official Rust website.
Select an Engine: Choose based on your project needs (e.g., Amethyst, Piston, GGEZ).
Set Up the Engine: Follow the installation instructions and consult documentation.
Start Coding: Utilize Rust’s low-level control and concurrency features.
Test and Deploy: Ensure your game runs smoothly across platforms.
## Case Studies
Veloren
Genre: Open-world RPG
Description: Uses Amethyst, featuring procedurally generated worlds and multiplayer gameplay.
Citybound
Genre: City-building simulator
Description: Built entirely in Rust, showcasing complex simulations.
Disruptor Beam
Genre: Mobile games
Description: Uses Rust for memory safety and performance in mobile game development.
These examples highlight the potential of Rust game engines to create high-performance, stable, and visually impressive games. | zoltan_fehervari_52b16d1d |
1,878,956 | Shree Vardhman Ambrosia Sector 70 Gurgaon | Vardhman Ambrosia | Shree Vardhman Ambrosia is a distinguished residential community offering luxurious 4 BHK apartments... | 0 | 2024-06-06T08:21:20 | https://dev.to/narendra_kumar_5138507a03/shree-vardhman-ambrosia-sector-70-gurgaon-vardhman-ambrosia-19ai | realestate, realestateinvestment, realestateagent, shreevardhmanambrosia | Shree Vardhman Ambrosia is a distinguished residential community offering luxurious 4 BHK apartments that elevate modern living. This exceptional development seamlessly blends comfort, style, and convenience, providing an unparalleled living experience.
[**Shree Vardhman Ambrosia offers**](https://shreevardhmanambrosia.tech) a host of premium amenities crafted to elevate your lifestyle. Stay active in the cutting-edge gym, dip in the crystal-clear swimming pool, or unwind in the serene, beautifully landscaped gardens that provide a tranquil escape in the city's heart.
Perfectly positioned, Shree Vardhman Ambrosia offers effortless access to major highways, shopping destinations, and business centers, guaranteeing a convenient and smooth daily routine. Enjoy the optimal blend of city convenience and tranquil living, with every aspect meticulously designed for comfort.
Discover Shree Vardhman Ambrosia, where sophistication meets comfort.
This thoughtfully crafted community delivers the pinnacle of contemporary living, addressing all your needs and wishes. Indulge in ultimate luxury, where each moment transforms into a treasured experience.
Contact Us: 8595808895 | narendra_kumar_5138507a03 |
1,878,954 | Automating Insulin Ordering: Adding an Event to Google Calendar (Part 5) | In the previous parts of this series, we discussed capturing the browser request to the GP's website... | 27,532 | 2024-06-06T08:20:47 | https://dev.to/goudekettingrm/automating-insulin-ordering-adding-an-event-to-google-calendar-part-5-3bhn | automation, productivity, programming, processoptimisation | In the previous parts of this series, we discussed capturing the browser request to the GP's website and sending an email to the pharmacy. Now, we will focus on automating the addition of an event to Google Calendar. We're going to be using `gcalcli` to reduce the amount of manual labor.
## Installing `gcalcli`
First, we need to install `gcalcli`. I'm using MacOS, so I can install in using homebrew:
```bash
brew install gcalcli
```
If you're on a different Operating System, check out [the gcalcli docs](https://github.com/insanum/gcalcli) to find your installation method.
## Setting Up Google Calendar API
To enable making events, we need to create a project in the Google Developer Console and set up OAuth credentials. Otherwise Google does not allow us using the Calendar API to create events. Here are the steps I used:
**Step 1.** Go to [Google Developers Console](https://console.developers.google.com) and create a new project, e.g., gcalcli or Insulin Orderer.
**Step 2.** In the left sidebar, click Enabled APIs and Services and click on "+ Enable APIs and Services". Look for the Google Calendar API and enable it.
**Step 3.** Create Credentials:
- Go back to the project gcalcli in the Developers Console.
- Navigate to the "Credentials" section in the left menu.
- Click "+ Create Credentials" > "OAuth client ID".
- Choose "Application type Desktop App".
- Name it gcalcli.
- The credentials produced here are needed in step 5.
**Step 4.** OAuth Consent Screen:
- Navigate to the "OAuth consent screen" section in the left menu.
- Select "External" users.
- Fill in the App name (e.g., gcalcli), User support email, and Developer contact information with your Gmail address.
- Leave the App domain blank.
- For Scopes, choose all calendar API-related scopes.
- Add your Gmail address as a Test user.
- Save everything and then go back to the dashboard. It is important to leave the Publishing status as Testing, otherwise your google calendar will be openly available to the world.
**Step 5.** Authenticate locally:
There are two ways in which you can authenticate your machine to enable interacting with Google Calendar. Either you login using the OAuth screen from google or you create a configuration file.
To login using the Google OAuth screen, paste the following command into your terminal (here you of course change the values of the `--client-id` and `--client-secret`):
```bash
gcalcli --client-id "your client ID ending in ...apps.googleusercontent.com" --client-secret "your client secret" agenda
```
This will open your browser and allow you to login.
Alternatively, you can create a configuration file like this: `touch ~/.gcalclirc`. Then edit this file and add the following to it:
```bash
--client-id="your client ID ending in ...apps.googleusercontent.com" --client-secret="your client secret"
```
In either case, after you've done this, you should be able to run `gcalcli agenda` and it should show you your agenda items.
## Adding a Task to Google Calendar
To check if the gcalcli command works, run:
```bash
gcalcli add
```
If this command runs correctly, it will ask you a few questions regarding the event you want to add. The most important parts are 'Title', 'When', 'Duration', and to which calendar to add the event to. Since I have access to multiple calendars, I needed to select the calendar to add the event to. I copied the name of the calendar to use in the command itself.
Here is the command I use to add an event to my Google Calendar:
```bash
gcalcli add --calendar 'Calendar Name' --title 'Pick up insulin' --when 'Tomorrow 13:00' --duration 15 --noprompt
```
This will add the event to the calendar with name `Calendar Name`. The title of the event will be `Pick up insulin`. It will be an event of 15 minutes and it will be scheduled for tomorrow at 13:00. Tomorrow is important, because it can take up to 24h before the prescription is available on my insurance card. Lastly, `--noprompt` will ensure that if data is missing (like the Location), it will not go into interactive mode to fill in the missing information, which is important for a script that needs to run autonomously.
The command can be added into the bash function relatively simply:
```bash
function add_calendar_task() {
gcalcli add --calendar 'Robin Goudeketting (privé)' --title 'Pick up insulin' --when 'Tomorrow 13:00' --duration 15 --noprompt
}
```
## What’s Next?
With the complete automation script in place, the next step will be to have this automation run regularly in the background. I can now already order insulin with one command in my terminal, but ideal would be if it runs periodically in the background.
Stay tuned for any further enhancements and refinements to this process!
Thank you for following along! If you have any questions or suggestions, feel free to leave a comment below. Don't forget to share this post with anyone who might find it useful.
| goudekettingrm |
1,878,949 | fydsiyfuyds876friuereur | https://gaming.lenovo.com/au/connect/groups/general/f/forum/15818/pelisplus-ver-garfield-fuera-de-cas... | 0 | 2024-06-06T08:18:09 | https://dev.to/sri_sugianti_29233e049efe/fydsiyfuyds876friuereur-16a3 | https://gaming.lenovo.com/au/connect/groups/general/f/forum/15818/pelisplus-ver-garfield-fuera-de-casa-2024-completa-gratis-en-espanol-latino
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https://jsbin.com/cuhigalake/edit?html,output | sri_sugianti_29233e049efe | |
1,878,946 | Innovation in Motion: The World of Screen LED Manufacturing | Innovation in Motion: Screen LED Manufacturing It features a display screen with LED lights when you... | 0 | 2024-06-06T08:17:13 | https://dev.to/ronald_woodgo_ba03f686524/innovation-in-motion-the-world-of-screen-led-manufacturing-50ld | design | Innovation in Motion: Screen LED Manufacturing
It features a display screen with LED lights when you have a television or a computer, it’s likely that. LED signifies Light Emitting Diode. Displays with LED lights possess total large amount of benefits. We're going to tell you exactly about it.
Benefits
Light-emitting Diode screens tend to be a lot better than old screens along with other kinds of lighting, like fluorescent lights. To start with, they normally use less energy. That's great for our planet! They also go longer than old displays. beneficial to your wallet.
Innovation
People who make led screen displays will always looking for ways to better cause them to become. They're constantly coming up with brand new ideas. For instance, they're constantly attempting to make the colors regarding the screen appearance better still.
Security
Light-emitting Diode screens tend to be less dangerous than old displays since they do not have as mercury much. Mercury is really a type or types of poison that's detrimental to folks and for the environment. Light-emitting Diode displays also emit less heat. That means they don't get since hot as old screens.
How to Use
Utilizing an screen LED easy! What you need to do is turn it on and then make use of your computer system or television remote to improve the station or pull a video up. You can even connect in your phone or other device to view video wall in the screen LED.
Innovation in Motion: the global world of Screen LED Manufacturing
Screen LED manufacturing is really a globe fascinating of and creativity. With brand new technology and developments on the go, LED screens are getting to be the norm in nearly every household. Nevertheless, there are numerous concerns and doubts in connection with usage, protection, and quality of those screens. Let us dig deeper into the various components of screen manufacturing LED make an effort to answer a few of these concerns.
Advantages
One of the biggest advantages of LED screens is their energy savings. They eat much less energy than fluorescent or incandescent screens, making all of them eco-friendly and affordable in the run long. Light-emitting Diode screens are also more durable and also have a lengthier lifespan than traditional screens. They provide a significantly better viewing knowledge, with brighter colors and sharper detail.
Development
The production LED is consistently trying to enhance their panel leds product. These are generally constantly searching for ways to improve the shade precision and brightness associated with displays, making use of technology advanced software. Producers may also be tinkering with brand-new styles and materials to help make the displays thinner, less heavy, and more versatile. Foldable screens are the innovation latest, which may revolutionize just how we view and interact with displays in the future.
| ronald_woodgo_ba03f686524 |
1,878,947 | How to create a chat bubble with Tailwind CSS and JavaScript | Remember the chat bubble we did with Tailwind CSS and Alpine JS? Well today we'll be doing the same... | 0 | 2024-06-06T08:17:13 | https://dev.to/mike_andreuzza/how-to-create-a-chat-bubble-with-tailwind-css-and-javascript-go2 | tutorial, javascript, tailwindcss | Remember the chat bubble we did with Tailwind CSS and Alpine JS? Well today we'll be doing the same thing but using vanilla JavaScript instead!
[Read the article,See it live and get the code](https://lexingtonthemes.com/tutorials/how-to-create-a-chat-bubble-with-tailwind-css-and-javascript/)
| mike_andreuzza |
1,878,944 | Digital marketing | Digital marketing is the use of digital channels to market products. Also known as online marketing,... | 0 | 2024-06-06T08:15:10 | https://dev.to/simranpreet_singh_12725eb/digital-marketing-40dg | webdev, javascript, programming, beginners | Digital marketing is the use of digital channels to market products. Also known as online marketing, digital marketing promotes brands and connects them to potential customers via the Internet. There are several digital marketing companies in Mohali. There are some digital marketing companies in Mohali - Wood Box Digital Media, Dezcode, Solution1313, Social Win, Digi Hawks Marketing, etc. These all companies are Google-verified companies in Mohali. These companies provide content marketing, website marketing, pay-per-click advertising, email marketing, social media marketing, affiliate marketing, video marketing, text messaging, etc. These companies' fees are under 20000-40000 rupees. These companies provide all gadgets to the student needs. In my opinion solution 1313 is best in all of these. This company is located on Airport road Mohali sector-82. This company provides website layout and development, Shopify website development, Website hosting, CMS-based websites, computer | simranpreet_singh_12725eb |
1,878,943 | Digital marketing | Digital marketing is the use of digital channels to market products. Also known as online marketing,... | 0 | 2024-06-06T08:15:07 | https://dev.to/simranpreet_singh_12725eb/digital-marketing-4apg | webdev, javascript, programming, beginners | Digital marketing is the use of digital channels to market products. Also known as online marketing, digital marketing promotes brands and connects them to potential customers via the Internet. There are several digital marketing companies in Mohali. There are some digital marketing companies in Mohali - Wood Box Digital Media, Dezcode, Solution1313, Social Win, Digi Hawks Marketing, etc. These all companies are Google-verified companies in Mohali. These companies provide content marketing, website marketing, pay-per-click advertising, email marketing, social media marketing, affiliate marketing, video marketing, text messaging, etc. These companies' fees are under 20000-40000 rupees. These companies provide all gadgets to the student needs. In my opinion solution 1313 is best in all of these. This company is located on Airport road Mohali sector-82. This company provides website layout and development, Shopify website development, Website hosting, CMS-based websites, computer | simranpreet_singh_12725eb |
1,878,942 | Nutrabliss | Boost your well-being with Nutrabliss's Best Whey protein, Multivitamin & Omega Fatty Acids.... | 0 | 2024-06-06T08:14:13 | https://dev.to/nutrabliss_0ee441e83cfab3/nutrabliss-3af3 | wheyprotein, bestwheyprote | Boost your well-being with Nutrabliss's [ Best Whey protein](https://www.nutrabliss.in/
), Multivitamin & Omega Fatty Acids. Buy Online 100% authentic Health & Sports Supplement.
We at Nutrabliss believe that a good diet is the foundation for great health. But even with the best intentions, the modern-day food chain doesn’t offer the nutrition you need for optimal health and vitality.
| nutrabliss_0ee441e83cfab3 |
1,878,941 | Reiconnect: Leading the Way in Renewable Energy Solutions | In today's world, the need for sustainable energy solutions has never been more critical. As the... | 0 | 2024-06-06T08:12:01 | https://dev.to/reiconnect/reiconnect-leading-the-way-in-renewable-energy-solutions-4abo | solar, renewableenergyproviders | In today's world, the need for sustainable energy solutions has never been more critical. As the effects of climate change become increasingly evident, individuals, businesses, and governments are seeking effective ways to reduce their carbon footprint and embrace eco-friendly power sources. This is where Reiconnect, a pioneering renewable energy provider, steps in, offering innovative and reliable solutions that harness the power of green energy.
The Rise of Renewable Energy Firms:
The transition to renewable energy has gained significant momentum over the past decade. [Renewable energy firms](https://reiconnect.online/) like Reiconnect are at the forefront of this movement, driving technological advancements and making clean energy more accessible and affordable. These firms are not just providing power; they are reshaping how we think about energy consumption and sustainability.
Embracing Solar Power:
Among the various renewable energy sources, solar power stands out for its versatility and abundance. Solar energy can be harnessed almost anywhere the sun shines, making it a viable option for a wide range of applications. Reiconnect specializes in solar power solutions, including the latest in solar hybrid inverters and hybrid solar systems.
Solar Hybrid Inverters: A Game-Changer
Solar hybrid inverters are an essential component of modern solar power systems. These devices convert the direct current (DC) generated by solar panels into alternating current (AC) that can be used by household appliances or fed into the grid. But what sets solar hybrid inverters apart is their ability to manage multiple power sources simultaneously.
Reiconnect’s solar hybrid inverters are designed to integrate solar power with other energy sources, such as wind turbines or the electrical grid, ensuring a seamless and uninterrupted power supply. This technology not only enhances the efficiency of solar power systems but also provides a reliable backup during periods of low solar generation, making it a cornerstone of hybrid solar systems.
The Advantages of Hybrid Solar Systems:
Hybrid solar systems combine the best of both worlds: solar energy and traditional power sources. These systems can store excess energy generated during sunny periods in batteries for use when the sun isn’t shining. This stored energy can then be used to power homes or businesses during nighttime or cloudy days, significantly reducing reliance on the grid and lowering electricity bills.
Reiconnect’s hybrid solar systems are tailored to meet the unique needs of each customer, ensuring maximum efficiency and cost savings. By leveraging advanced [renewable energy technology](https://reiconnect.online/), Reiconnect is helping to make green energy a practical and attractive option for a diverse range of users.
Eco-Friendly Power for a Sustainable Future
The adoption of eco-friendly power solutions is not just about reducing carbon emissions; it’s about creating a sustainable future for generations to come. Renewable energy technology plays a vital role in this endeavor. By investing in and promoting the use of renewable energy, Reiconnect is contributing to a cleaner, healthier planet.
Comprehensive Renewable Energy Solutions:
Reiconnect offers a comprehensive suite of [renewable energy solutions ](https://reiconnect.online/)designed to meet the diverse needs of its clients. From residential solar installations to large-scale commercial projects, Reiconnect provides end-to-end services, including consultation, design, installation, and maintenance.
Their commitment to quality and customer satisfaction ensures that each project is executed with precision and care. By focusing on renewable energy solutions that are both innovative and practical, Reiconnect is empowering individuals and businesses to make a positive impact on the environment.
The Future of Clean Energy:
As renewable energy technology continues to evolve, the potential for even greater efficiency and affordability is within reach. Innovations in solar power, battery storage, and energy management systems are paving the way for a future where clean energy is the norm, not the exception.
Reiconnect is dedicated to staying at the cutting edge of these developments, continually refining and expanding their offerings to meet the growing demand for sustainable energy solutions. Their vision is a world where green energy powers our lives, reduces our environmental impact, and supports a thriving, sustainable economy.
Conclusion:
Reiconnect is more than just a renewable energy provider; it is a beacon of innovation and sustainability in the renewable energy sector. Through their advanced solar hybrid inverters, hybrid solar systems, and comprehensive renewable energy solutions, they are making significant strides toward a greener future.
By choosing Reiconnect, consumers and businesses alike can take an active role in the global transition to eco-friendly power, contributing to the preservation of our planet and the well-being of future generations. Embrace the power of renewable energy with Reiconnect and join the movement towards a sustainable, clean energy future.
Source: https://reiconnect.online/
| reiconnect |
1,878,940 | Golden Ambiance: Creating Warmth with Gold Pendant Lights | Warm Atmosphere :Gold Pendant Lights Golden atmosphere could be the answer perfect anyone who wants... | 0 | 2024-06-06T08:10:02 | https://dev.to/ronald_woodgo_ba03f686524/golden-ambiance-creating-warmth-with-gold-pendant-lights-2aja | design | Warm Atmosphere :Gold Pendant Lights
Golden atmosphere could be the answer perfect anyone who wants to add a touch of heat and style for their residence. These silver pendant lights are a gorgeous and method in which is revolutionary enhance any space's ambiance, in addition they provide many advantageous assets to their particular users. We shall explore the advantages which are different will enjoy by utilizing these pendant lights, the unique functions which make them shine, and just how best to use them. We'll additionally have a look at the standard of the product, its security functions, and its application in numerous settings. So let's dive right into it as we discussed it further.
Benefits of Golden Ambiance Gold Pendant Lights
One of the main advantages of Golden Ambiance gold pendant chandelier lights is the capacity to produce a hot and atmosphere inviting any room. The golden colour of the lights adds a touch of style and elegance to your area while creating a atmosphere welcoming.
Innovation and Safety
Golden Ambiance gold pendant lights may also be innovative with regards to their security functions. They function UL official certification, which helps to ensure that they satisfy security requirements when it comes to North American marketplace. Which means that they've been rigorously tested and fulfill strict protection criteria that you can trust these lights, once you understand.
Another special function of the pendant chandelier lights lights is the fact that they are made of durable materials that withstand utilize daily. The grade of the item guarantees it a great investment in your home's ambiance that it will last for years to come, making.
Utilizing Golden Ambiance Pendant Lights
Utilizing Golden Ambiance gold pendant lights is easy, and they may be installed in almost any room with just minimal effort. These lights work nicely in a number of settings, from traditional to decor modern. You are able to put them over your living area table, in the hallway, and on occasion even in the bathroom to create a comfortable, warm ambiance.
To use these lights being pendant you should start with choosing the area in which you would you like to install all of them. Then, gauge the height regarding the ceiling, as this will determine the length of the cord you'll need. After that, you can easily install the light installation, following manufacturer's guidelines carefully.
Provider and Quality
Golden Ambiance is known for its solution exceptional and crystal chandeliers products. They take great pleasure within their items, ensuring that each piece is very carefully crafted to display the beauty and beauty of the material. Additionally they provide exemplary customer care, making certain consumers are satisfied with their particular expenditures and assistance receive they have any questions or issues.
| ronald_woodgo_ba03f686524 |
1,878,939 | Premier Social Media Marketing Agency in Delhi - Digital Script | Welcome to Digital Script, your premier destination for exceptional social media marketing services... | 0 | 2024-06-06T08:08:51 | https://dev.to/digital_script/premier-social-media-marketing-agency-in-delhi-digital-script-4o3p | Welcome to [Digital Script](https://www.digitalscript.in/), your premier destination for exceptional social media marketing services in Delhi. As a leading social media marketing agency in Delhi, we specialize in empowering small businesses, medium enterprises, and esteemed brands to thrive in the dynamic digital marketing landscape. Our commitment is to deliver unparalleled results through innovative strategies tailored to meet your unique business needs.
At Digital Script, we understand the pivotal role that social media platforms play in connecting with your target audience and fostering meaningful conversations. Leveraging our expertise, we craft compelling social media campaigns designed to elevate your brand presence and drive tangible results. Whether you're seeking to increase brand awareness, boost engagement, or drive sales, our dedicated team is here to transform your social media presence into a powerful revenue-generating asset.
**Why Choose Digital Script as Your Social Media Marketing Partner in Delhi?**
**Expertise:** With years of experience in the industry, we possess the knowledge and skills to deliver exceptional results that exceed your expectations.
**Customized Strategies:** We believe in a tailored approach, crafting bespoke social media marketing strategies aligned with your business objectives and target audience.
**Comprehensive Services:** From social media management and community engagement to targeted advertising campaigns, Digital Script offers a full spectrum of services to propel your brand forward.
**Proven Results:** Our track record speaks for itself. We have helped numerous clients achieve remarkable success and establish a formidable presence in the digital realm.
**Transparent Communication:** We prioritize transparency and open communication, keeping you informed every step of the way and providing insightful analytics to track your progress.
Partner with Digital Script today and experience the difference that strategic social media marketing can make for your business. Let us be your trusted ally on the journey to digital success. | digital_script | |
1,878,938 | DeepNude AI: Exploring the Moral Entanglement and Administrative Labyrinth in AI Advancement | Introduction: In the mind-boggling domain of man-made consciousness, the appearance of DeepNude AI... | 0 | 2024-06-06T08:05:59 | https://dev.to/ramisa_seo_6646ca8b9d1c24/deepnude-ai-exploring-the-moral-entanglement-and-administrative-labyrinth-in-ai-advancement-4kfg | **Introduction:**
In the mind-boggling domain of man-made consciousness, the appearance of DeepNude AI has catalyzed a change in perspective, compelling partners to stand up to complex moral quandaries and explore a maze of administrative difficulties. This article sets out on an excursion to investigate the multi-layered effect of DeepNude AI on the definition of AI strategies, unwinding the moral predicaments and administrative problems it presents.
**Interpreting DeepNude AI:**
Brought about by a perplexing designer in 2019, DeepNude AI saddles the force of cutting-edge generative ill-disposed networks (GANs) to consistently take away attire from pictures, delivering exact bare recreations. While the specialized ability behind this advancement is obvious, its moral repercussions resound across society, touching off banter on protection encroachment, assent disintegration, and the disintegration of human pride.
**Moral Junction:**
The rise of DeepNude AI fills in as a powerful litmus test for the moral limits of AI improvement and organization. By empowering the production of non-consensual bare symbolism, the innovation stomps all over individual independence and protection, raising a genuine stronghold of weakness against double-dealing, badgering, and mental injury. Besides, the verisimilitude of the produced content foggy spots the line between the real world and creation, creating a long, shaded area of uncertainty and disinformation.
**Influence on Arrangement Talk:**
DeepNude AI's disputable presentation has pushed policymakers, researchers, and activists into the cauldron of consideration, convincing them to rethink existing AI administration systems and examine novel administrative mediations. There is a developing agreement on the basics of cultivating straightforward and responsible AI rehearsals that focus on moral goals and moderately likely mischief. Thus, states and administrative bodies wind up at a junction, constrained to order regulation to control the odious abuse of AI, especially in the domain of non-consensual sexual entertainment and protection infringement.
**Legitimate Traps and Intricacies:**
The worldwide reaction to the moral pickles presented by DeepNude AI has been portrayed by an interwoven of authoritative and administrative measures. While certain locales have proactively condemned the creation and spread of deepfake sexual entertainment without assent, others wrestle with the complexities of the requirement in a period of borderless advanced scenes. The transnational idea of the web muddles administrative undertakings, requiring coordinated endeavors and worldwide joint efforts to stem the tide of AI-empowered hurt.
**Orchestrating Development and Guidelines:**
The logic between development and guidelines lies at the core of the talk encompassing DeepNude AI. While AI holds the commitment of extraordinary cultural advancement, unrestrained expansion presents existential dangers to security, respect, and social attachment. Policymakers stand up to the huge assignment of stringing the needle between encouraging development and defending major freedoms, all while exploring the tempestuous waters of consistency and responsibility.
**Looking Towards the Skyline:**
As AI proceeds with its unyielding walk forward, the moral and administrative repercussions of innovations like DeepNude AI will keep on molding strategy thoughts and cultural standards. Cooperative undertakings between policymakers, industry partners, and common society are essential to charting a course towards powerful administration structures that maintain moral objectives, shield individual freedoms, and encourage capable AI development. By facing the moral entanglements presented by DeepNude AI head-on, society can establish the groundwork for a more impartial and morally grounded AI environment.
**Conclusion:**
**[DeepNude AI](https://www.deepnudeaitool.com/)** fills in as a sobering sign of the complex transaction between mechanical development, moral contemplations, and administrative objectives in the AI scene. While its rise has catalyzed discussions and difficulties, it additionally presents an unrivaled chance to rethink moral boondocks and sustain administration components for AI. By facing the moral problems presented by DeepNude AI with resolve and strength, policymakers and partners can chart a course towards a future where AI fills in as a power for good, directed by moral goals and moored in human respect.
| ramisa_seo_6646ca8b9d1c24 | |
1,878,937 | Beautiful Soup: An Essential Tool for Web Scraping | As a developer, my journey into web scraping began back in 2008. I first started using PHP to... | 0 | 2024-06-06T08:04:58 | https://dev.to/ak_23/beautiful-soup-an-essential-tool-for-web-scraping-2k1f | python, beginners, productivity, learning |
As a developer, my journey into web scraping began back in 2008. I first started using PHP to download songs from songs.pk, a site I used just for fun and learning. I’m not sure if that site is still available, but it was my introduction to the fascinating world of web scraping. Around the same time, my roommates worked at a major security firm where they crawled the web to download files and analyze them for malware. Their work sparked my interest in web scraping and data extraction.
## The Importance of Data in AI
In today's AI-driven world, data is king. Collecting and curating large datasets is crucial for training machine learning models. Web scraping is one of the methods used to gather this data. While the ethics and legality of web scraping can be complex and vary by jurisdiction and specific use case, this post is focused on the technical aspects for learning purposes.
## Getting Started with Beautiful Soup
To begin using Beautiful Soup, you first need to install it. This can be done using `pip`:
```bash
pip install beautifulsoup4
```
For better performance, I recommend using the `lxml` parser:
```bash
pip install lxml
```
### Example
Here's a quick example from a recent project where I needed to scrape data from a sample page:
```python
from bs4 import BeautifulSoup
html_doc = """
<html>
<head>
<title>Sample Page</title>
</head>
<body>
<h1>Welcome to the Sample Page</h1>
<p class="description">This is a sample paragraph with <a href="http://example.com/link1" class="link">a link</a>.</p>
<p class="description">Here is another paragraph with <a href="http://example.com/link2" class="link">another link</a>.</p>
</body>
</html>
"""
soup = BeautifulSoup(html_doc, 'lxml')
print(soup.prettify())
```
When I first saw the formatted HTML output, I was amazed at how easily Beautiful Soup could parse and tidy up even the messiest HTML.
## Navigating the Parse Tree
Navigating through HTML content is straightforward with Beautiful Soup. Here are a few methods I frequently use:
### Tag
Accessing tags is simple:
```python
print(soup.h1) # <h1>Welcome to the Sample Page</h1>
print(soup.h1.name) # h1
print(soup.h1.string) # Welcome to the Sample Page
```
### NavigableString
Extracting text within a tag:
```python
print(soup.p.string) # This is a sample paragraph with a link.
```
### BeautifulSoup Object
The `BeautifulSoup` object itself provides a way to search the document's content:
```python
print(soup.name) # [document]
print(soup.attrs) # {}
```
### Finding All Tags
Retrieving all occurrences of a tag is particularly useful:
```python
links = soup.find_all('a')
for link in links:
print(link.get('href'))
# http://example.com/link1
# http://example.com/link2
```
### Searching by Attributes
Searching by tag attributes has been a lifesaver:
```python
descriptions = soup.find_all('p', class_='description')
for description in descriptions:
print(description.text)
# This is a sample paragraph with a link.
# Here is another paragraph with another link.
```
## Modifying the Parse Tree
Beautiful Soup isn't just for reading data; you can modify the HTML content as well:
### Adding Content
Adding new tags dynamically:
```python
new_tag = soup.new_tag('p')
new_tag.string = 'This is a newly added paragraph.'
soup.body.append(new_tag)
print(soup.body)
# <body>
# <h1>Welcome to the Sample Page</h1>
# <p class="description">This is a sample paragraph with <a href="http://example.com/link1" class="link">a link</a>.</p>
# <p class="description">Here is another paragraph with <a href="http://example.com/link2" class="link">another link</a>.</p>
# <p>This is a newly added paragraph.</p>
# </body>
```
### Removing Content
Removing tags is straightforward:
```python
soup.h1.decompose()
print(soup.h1)
# None
```
### Altering Content
Changing attributes and text within tags is easy:
```python
first_link = soup.find('a')
first_link['href'] = 'http://example.com/modified'
first_link.string = 'modified link'
print(first_link)
# <a class="link" href="http://example.com/modified">modified link</a>
```
## Real-World Applications
In my experience, Beautiful Soup has been incredibly useful for various tasks. Here are a few scenarios where it can shine:
- **Data Analysis**: Extracting data from web pages to feed into data analysis tools.
- **Automation**: Automating the retrieval of information from websites, saving time and effort.
- **Research**: Gathering data for research projects, especially when dealing with large volumes of web content.
## Conclusion
Beautiful Soup simplifies the process of web scraping by providing an intuitive interface for parsing HTML and XML documents. Its robust feature set allows for efficient navigation, searching, and modification of the parse tree, making it an indispensable tool for developers working with web data.
For more detailed information and advanced usage, refer to the [Beautiful Soup documentation](https://www.crummy.com/software/BeautifulSoup/bs4/doc/). | ak_23 |
1,878,936 | TECHNOLOGY | Nowadays technology is increasing day by day. Our scientists are working on new devices regularly to... | 0 | 2024-06-06T08:04:29 | https://dev.to/karanveer_singh_ea4d59f45/technology-1leo | beginners, tutorial, learning | Nowadays technology is increasing day by day. Our scientists are working on new devices regularly to make human life easy. In this modern era, digital marketing is at its peak. which makes people's life more smooth. There are a plethora of advantages of Internet marketing. First, It is 24x7 available. Furthermore, It provides door-to-door services and several targets have wide advantages. It is globally available. Furthermore, denizens can cancel their products. Lastly, It also provides jobs to human beings.
Many people are earning from home through digital marketing. Mases can give ads for products. Moreover, Nowadays teenagers are also doing work through digital marketing. they are not dependent on their parents. In our society, there are many digital marketing training centers.
It is easy to learn and provides good earnings. It has fewer requirements you need only a laptop and wifi to learn it. It has no fixed age to learn. In addition, Denizens can also sell their products through online advertising.
| karanveer_singh_ea4d59f45 |
1,878,935 | Golden Glamour: Enhancing Your Home with Gold Pendant Lights | Golden Glamour: Add Style to Gold Pendant Lights to your house Do you want to give your property an... | 0 | 2024-06-06T08:02:29 | https://dev.to/ronald_woodgo_ba03f686524/golden-glamour-enhancing-your-home-with-gold-pendant-lights-2d7e | design | Golden Glamour: Add Style to Gold Pendant Lights to your house
Do you want to give your property an elegant and appearance luxurious? Then take a look at fantastic lights that are pendant! These lights are a definite combination perfect of and functionality, and may be used to brighten your whole house. We will be speaking about the many benefits of utilizing gold lights that are pendant how exactly to use them, their safety functions, quality, programs, while the excellent services that can come with their particular purchase.
Features of Gold Pendant Lights
Gold pendant lights have several benefits that make all of them an option of interest your house. Firstly, they boost the good thing about their striking and sleek design to your house. Visually, they could bring allure and glamor to your residence and present it an vibe genuine.
Their particular development is yet another valid reason the reason why they've been well suited for your home. They're made to give a hot yet believe is modern will add a refreshing touch to your space. Advanced technology has been used in order to make these lights durable and also to supply efficient black chandelier lighting that can continue for a time very long.
When installed, these lights will brighten your home whole can be adjusted to fit your certain requirements. If you are interested in an energy-efficient way to enhance your home up, then gold pendant lights are perfect for you.
Security Features
The security popular features of silver pendant lights are a consideration significant buying them. Top-quality materials are acclimatized to make sure these are typically safe and durable. Safety features add a durable and material heat-resistant, which can avoid any risks of electric surprise or fire. The steel installation could well keep the bulb also in position, making certain it does not fall and trigger damage or damage.
Usage of Gold Pendant Lights
Silver pendant lights can be used in lots of ways and can fit in with many interior different. They could be installed within the home island, in your bedroom or family room to offer an shine background. These lights can also be used within the dining room to give it a feel luxurious.
To get the most from the pendant lights, think about the level that you'll go through the illumination most readily useful. This could easily be determined by the dimensions of the area and also the size of the chandelier light pendant you purchase.
Just how to Use Gold Pendant Lights
To use a gold pendant light in your house, you may first want to select style correct design. It’s important to think about the motif general of area and select a pendant that suits it. There are lots of designs being various and you ought to take time to choose the right one for your house.
Once you have selected the light pendant of choice, it is possible to install it in your home. You need to proceed with the guidelines being certain have the light installation. Many light fixtures are easy to install and certainly will be performed with the aid of a grouped member of the family or friend. You may also employ a electrician professional set up.
Service and high quality
Golden pendant lights come with numerous services and characteristics which are exceptional. A maker reputable quality services and products with positive customer care. There are many gold different light companies readily available, so it’s essential doing study and choose a trusted one. When selecting a business to obtain a chandelier lights pendant, start thinking about their reviews and customer feedback. A manufacturer with reviews that are positive and comments shall present confidence inside their product.
Application of Gold Pendant Lights
Gold lights which can be pendant be applied in numerous applications and locations around your home. They may be made use of to add charm and magnificence to your bedroom, living room, family area, dining area, and kitchen. You should use them to check your wall design or being a point focal your interior decorating.
| ronald_woodgo_ba03f686524 |
1,876,958 | Getting Started with GTM in Next.js App Router | Have you ever thought about tracking user behavior on your website? If yes, you are probably familiar... | 27,618 | 2024-06-06T08:00:29 | https://richardkovacs.dev/blog/getting-started-with-gtm-in-nextjs-app-router | nextjs, seo, gtm, google | ---
date: 2024-01-06 19:35:00 UTC
tags:
canonical_url: https://richardkovacs.dev/blog/getting-started-with-gtm-in-nextjs-app-router
---
Have you ever thought about tracking user behavior on your website? If yes, you are probably familiar with Google Analytics, the state-of-the-art user tracker companion. How about Google Tag Manager? Also yes? Of course, since that's how you've found this post. If you are at the first step of setting it up, you are in the right place. But in case you have never heard about it, I still recommend reading it to the end because who knows? You might learn something you didn't even know you needed. So let's get started.
## Motivation
Why did I write this post? There are a couple of reasons. First, I have always felt that there is much more to Google Analytics than simply seeing how many active users you have currently and had in the last few days. But I had no idea how to configure this. I also knew it was possible to see which buttons your users press the most, but again, I didn't know how to do it.
Second, I found a convenience library made by the Next.js team that makes it extremely easy to integrate Google Tag Manager and Google Analytics into a website. Still, sadly, as of writing this post, it contains an unresolved bug many face when installing it. I will uncover how to overcome this and what my workaround is.
And finally, my ultimate reason was that I wanted to configure all of the above on [ReadSonic](https://readsonic.io/), my audioblog website. So, if you have the same ambitions as me and work with the same tech stack, namely Next.js, and Google, then look no further because this post was written for you.
A quick disclaimer before I jump into it: this post isn't an in-depth guide about Google Tag Manager. It is a simple Next.js and GTM tutorial to get you started as fast as possible.
## What is Google Tag Manager?
Google Tag Manager (GTM) is a marketing tool that helps you track user behavior with extremely granular configuration for each kind of interaction. It can track scroll behavior, clicks, video plays, back and forward navigation inside the page, and many more, just to mention a few. But the primary goal of this post is to show how to set up GTM with the Next.js App Router, so I will simply stay at tracking clicks on the website.
GTM is free to use, and you can also easily connect it to Google Analytics to see the tracked clicks in one location. GTM defines numerous user interaction types by default, but of course, you can define custom ones, although they recommend using the built-in interactions for better results.
GTM can look extremely overwhelming on the first visit. You find Tags, Triggers, and Variables everywhere. You feel they are somehow connected and need them all, but you don't know how and when. On top of that, many guides on the internet use the same terminology as GTM, so you aren't helped with those either. Here is my attempt.
The first step you must make if you just opened Google Tag Manager is to create a new Account and a Container. In my case, it looks like the image below.
You have to choose the name and location of the new account. Then, you have to configure the name and type of the container. Next, you must agree to the Google Tag Manager Terms of Service Agreement and, depending on your location, potentially GDPR. Once your account and container are created, you will see a code snippet that you can use to embed GTM on your website.
You may use this option, but I will show you a more convenient method designed explicitly for Next.js. Don't worry if you accidentally close this popup since you can reopen it later by pressing your GTM tag in the toolbar. It has a format like this: GTM-XXXXXXXX.
You are done with the first step, so let's explore a more exciting territory: Variables.
### What are Variables?
You definitely need them, but chances are you don't have to define custom ones, contrary to what other guides might suggest. Variables have two major types: built-in and user-defined ones. There are many more types inside these two categories, but explaining them is out of the scope of this post. For now, you have to understand three things:
- there are built-in variables you can choose from,
- you can define custom ones if they are not enough, and finally,
- you most probably won't need custom ones for simple use cases.
Simply put, Variables are metadata in your website that you can refer to. The `id` of a button is a Variable. Its `class` is also a Variable. And so is its target, text, and URL. The same is true for any other element. You can refer to any `div`, `a` tag, `button`, `span`, etc., by variables in GTM. But the hostname, URL, and the path the user is currently on are also Variables. There are specific Variables for forms, videos, and navigation history. I think you get the idea now.
The most basic use case is this: you have some buttons on your landing page, each having a different `id`, and you want to track clicks on them. For this, first, you must enable clicks in the Variables menu by clicking the Configure button in the upper right corner.
Enable each Click Variable like the image above, and that's it. Understanding what a Variable is is important because, in the next step, you have to refer to them when you define Triggers.
### What are Triggers?
While it's relatively hard to choose the most important component of GTM, if I had to choose one, I would say Triggers are these.
Triggers are user interactions GTM can track. They have multiple types. Like in Variables, you can also define custom Triggers or events your app can listen to. Click-type Triggers can be the click on a link or any element in the DOM, like a button.
But the depth of scrolling a user does on your site is also a Trigger. And so is the loading of the DOM.
So, how are Triggers and Variables connected? For the sake of simplicity, I will stay at the simplest kind of Trigger: a click.
To simplify things even more, I must mention that you can define a Trigger that listens for _every_ click. In this case, you don't need a Variable at all. However, usually this is not the case. Collecting every single click, even those on a div, would probably bloat your logs, and you don't want that.
What you want instead is to listen to specific clicks. For example, you would collect every click on the main call-to-action button in your hero section with `id="cta-button"`. Or you could also collect every navigation to the login page with a link or button having `id="login-button"`.
Remember what Variables were? Metadata in your website, like an `id` or a `class`. To filter clicks based on these, you must use them when setting up a Trigger. Here is what it looks like on the UI.
**NOTE:** If you want to track clicks on a button with other elements in itself, child elements can hijack that click if they are below the cursor. A common example is a button with an icon in it. A click of the button will usually be a click on the image. To overcome this, you can set `pointer-events: none;` on the image. This way, every click will happen on the button and show up correctly in your analytics.
Okay, so you already know that you can listen to user events on your site (Triggers), and you can filter them based on some conditions (Variables). But you still have no idea how to collect and view these. You probably also want to provide this information to other services like Google Analytics or some other external user behavior monitoring tool. For this, you need Tags.
### What are Tags?
Since GTM is only for configuration, you need a place to collect and view events that happened on your page. This is what Tags are for. Tags are the connection to the world outside GTM.
When you define a Tag, you must choose a Trigger that the Tag should listen to, and then you must configure where the event should be forwarded. As you probably already guessed, Tags also have multiple types, and you can define custom Tags, but I will keep things at the beginner level for this post. If you are a Google user, forwarding events to Google Analytics 4 is an obvious choice. In the image below, you can see how the `GA4 Event` type is chosen for the Tag Type, and below it, there is the Trigger from the previous image.
In this case, you must also configure a Measurement ID, which is the ID of your Google Analytics 4 web data stream. It has the format G-XXXXXXXXXX. This ID is crucial to finding the correct GA4 configuration where GTM should forward the button clicks. Finally, you must provide an Event Name, which will be displayed in Google Analytics. The event name can be static, or it can be a Variable. The same Variable I spoke about earlier. If you are using a variable like Click Text, the event's name in Google Analytics will be the innerText of the button clicked. It is especially useful when you define Triggers based on class, and the same Tag collects multiple button clicks. Click Text makes it easy to differentiate between them. You can, of course, use other available Variables if you want.
When you define your Measurement ID, there is one thing you must be aware of. You will probably see the warning below.
The **Google Tag** is a specific kind that helps establish the data flow from the website to Google Analytics or other destinations. You can find more information on the [Tag Manager Help page](https://support.google.com/tagmanager/answer/9442095) if interested.
Simply create it with the **Create tag** button on the right. Again, use your Google Analytics ID as the Tag ID when creating it. You only need to do this once. Other Tags created later will find your existing Google Tag and won't throw the warning anymore.
With this setup, you are done. You should see the events in Google Analytics soon if everything goes well. Disable any ad blockers if you experience nothing being shown on the dashboard. Using them is a common cause of missing events since they usually prohibit website trackers from working correctly.
When you created the container in the first step, you received a guide (a code snippet) that you must include in your website to make GTM work. But as I mentioned at that point, you don't need it at all because Next.js already did the hard work for you.
## Integration with Next.js
Since you are here, you are probably familiar with Next.js, so I won't make this post longer by introducing it. Next.js makes it ridiculously easy to integrate some third-party apps. Luckily for us, one of them is Google Tag Manager.
**NOTE:** I am using the App Router in this guide. Ensure you are also using it when following the examples below. There's a good chance it would also work with the Pages Router, but I only tested and used the App Router in the following snippets.
Execute the following command to install the [third-party extension](https://nextjs.org/docs/app/building-your-application/optimizing/third-party-libraries) module:
```bash
npm i @next/third-parties
```
When it is finished, you can integrate GTM with a simple line:
```tsx
import { GoogleTagManager } from '@next/third-parties/google';
export default function RootLayout({
children,
}: {
children: React.ReactNode
}) {
return (
<html lang="en">
<body>{children}</body>
<GoogleTagManager gtmId="GTM-XXXXXXXX" /> <-- The line you need
</html>
)
}
```
Put the above code in your root layout.tsx file to include GTM on every page of your web application. This module also exposes helper functions to send custom events to GTM. However, if you are satisfied with the built-in Triggers and Variables I explained earlier, the code above is enough to send every button click to GTM. No additional code is required.
### Integrating Google Analytics
The third-party module also helps with Google Analytics integration and lots of other web analytics tools, but as of writing this post, there is an unresolved bug with it, which results in the following error:
To fix this, I only used the third-party extension for GTM and solved GA configuration with a custom snippet. Here is my workaround in case you need it.
```tsx
import Script from "next/script";
import { GoogleTagManager } from "@next/third-parties/google";
import conf from "../conf/config";
export default function Analytics() {
return process.env.NEXT_PUBLIC_ENVIRONMENT === "production" ? (
<>
<Script
src={`https://www.googletagmanager.com/gtag/js?id=${conf.googleAnalyticsId}`}
strategy="afterInteractive"
/>
<Script id="google-analytics" strategy="afterInteractive">
{`
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', '${conf.googleAnalyticsId}');
`}
</Script>
<GoogleTagManager gtmId={conf.googleTagManagerId} />
</>
) : null;
}
```
To avoid errors locally and in the test environment, I have a guard that only includes Google Analytics and Tag Manager when the app runs on production. The `<Script>` tags are what GA gives you for manual setup, and down below is the `GoogleTagManager`, which is reduced to a single line if you are using the third-party extension. This `<Analytics />` component is included in the root layout instead of `GoogleTagManager`.
## The final result
Hopefully, you did everything by my description, and the UIs haven't updated much since I released this post. 😁
If everything is set up, click some buttons you connected with GTM to Google Analytics, then open the dashboard and check the events arriving in a minute or two. Here is the result in my case.
The landing page of [ReadSonic](https://readsonic.io) has some call-to-action buttons at the top named **Let's hear it** and **Read more** , and it also has some sample voices with names the user can try before registering. You can see in the image above that I pressed these buttons several times when I tested that GTM was working and forwarding events to GA correctly. You don't see here `primary-cta` and `secondary-cta` anywhere because I am using the `Click Text` Variable as the event's name. Remember this part? You can configure the forwarded click events to appear as the `innerText` of the pressed button in Analytics. You can see it in action above.
## Summary
This post won't turn you into The Master of Tag Manager, but that wasn't the goal either. Since the App Router in Next.js is relatively new, and so is GA4, I haven't found any introductory posts about integrating them with GTM. Now we have one.
By following the steps above, you should have a working setup that can track any particular click on your site, and they will appear in your Analytics dashboard.
There's much more to GTM than simple Variables, Triggers, and Tags, but if your requirements are as simple as mine, you don't need a complicated solution. Go with the built-in options and make your life easier.
See you next time. | richardkovacs |
1,843,973 | Database Chaos: Is Your Bottom Line Hanging By a Thread? | Today’s business relies heavily on data-driven decisions. The importance of leveraging data lies in... | 0 | 2024-06-06T08:00:00 | https://www.metisdata.io/blog/database-chaos-is-your-bottom-line-hanging-by-a-thread | sql, database, monitoring | Today’s business relies heavily on data-driven decisions. The importance of leveraging data lies in its ability to provide valuable insights into consumer behavior, market trends, and operational efficiency. Advanced technologies such as artificial intelligence, machine learning, and big data analytics enable the collection, processing, and interpretation of vast amounts of data at unprecedented speeds. This not only enhances the accuracy of decision-making but also empowers businesses to stay agile and responsive in a rapidly changing environment.
We can apply many different solutions to get more from our data. However, all of them rely on the database. To build modern observability, reporting, business intelligence, or machine learning, we need to have well-maintained data sources that hold all we need and can run queries fast. Therefore, we need to master [database maintenance](https://www.metisdata.io/product/prevention) to make sure that our databases are in shape and can keep up with the increased load and more complex database tasks.
Database management is not easy. We need good [database observability](https://www.metisdata.io/) solutions that monitor database health and can save us from various issues. Also, we need to work on database optimizations, whether it’s through our database directly (like some intricate PostgreSQL tuning) or by changing the architecture of our applications.
In this article, we’re going to see how database bugs can negatively affect our business and how we can protect ourselves from dire consequences.
**Recommended reading:** [**Observability vs Monitoring: Key Differences & How They Pair**](https://www.metisdata.io/blog/observability-vs-monitoring-key-differences-how-they-pair)
## Database Bugs and Their Impact on Your Business
Slow databases affect your business in many ways. First and foremost, they can take your business down and cause an outage. **Downtime disrupts regular business operations, resulting in immediate financial losses and potential damage to the organization's reputation**. Additionally, lost productivity is a significant direct cost as employees may struggle to access essential information, leading to inefficiencies and delays in completing tasks.
There are also indirect costs that arise from compromised decision-making processes, as inaccurate or outdated data can mislead strategic planning and hinder the ability to make informed choices. When you base your decisions on invalid data, you get invalid decisions.
Yet another issue is around productivity. You don’t want to waste time on fixing the database. You prefer to use the time of your developers to build new features and move the business forward. Fixing the database is neither of these.
A well-maintained and optimized database serves as the backbone of organizational data management, ensuring the accuracy, reliability, and accessibility of crucial information. A healthy database not only facilitates efficient data retrieval but also enhances system performance, reducing the risk of downtime and operational disruptions. In essence, database health is a linchpin for operational excellence and a key determinant of a company's ability to outperform competitors in today's fast-paced and data-centric business environment.
**Recommended reading:** [**Troubleshooting Database Issues Like a Pro**](https://www.metisdata.io/blog/troubleshooting-database-issues-like-a-pro)
We can face many bugs when dealing with databases. Some of them may be attributed to clients having the **wrong configuration** (like SQLSTATE 08006, [PostgreSQL F0000](https://www.metisdata.io/knowledgebase/errors/postgresql-f0000), or [MySQL 1087](https://www.metisdata.io/knowledgebase/errors/mysql-1087)), some others may indicate **problems with the database schema** (like PostgreSQL 3F000or [MySQL 182](https://www.metisdata.io/knowledgebase/errors/mysql-182)). No matter what the issues are, they can lead to serious business problems. GitLab faced a [couple](https://about.gitlab.com/blog/2017/02/10/postmortem-of-database-outage-of-january-31/) of [outages](https://gitlab.com/gitlab-com/gl-infra/production-engineering/-/issues/791) because of a slow database. [Sony was breached](https://www.theverge.com/2023/10/5/23905370/sony-interactive-entertainment-security-breach-confirmation) multiple times. [Heroku was failing](https://status.heroku.com/incidents/2558) because of a data type mismatch. Many other issues could have happened just like the [Halloween Problem](https://en.wikipedia.org/wiki/Halloween_Problem). You simply need to keep your database in shape.
## Routine Database Tasks for Optimal Performance
Let’s go through the typical routines you should follow to keep your databases healthy. This is by no means an exhaustive list. Depending on your business, you may need to do more.
* Vacuuming
* Defragmenting indexes
* Refreshing statistics
* Taking a backup
* Updating your database
* Checking the distribution of values
* Revisiting indexes usage
* Checking logs for attacks
* Looking for slow queries
* Partitioning your data
* Verifying a backup
As mentioned above, there are other tasks you should perform depending on your business. Do not let your database break. Let’s now see the details.
### Vacuuming
In normal PostgreSQL operation, tuples that are deleted or obsoleted by an update are not physically removed from their table. We need to remove them manually. This is called vacuuming.
Vacuuming is important because dead tuples slow the queries down. When there are dead tuples, the database engine needs to load more data from the drive which directly impacts the performance.
To vacuum, we need to run the command ***VACUUM*** which cleans all tables and indexes the user can access. This should be executed by the superuser.
### Defragmenting Indexes
Indexes may get fragmented when you add and remove data. Since indexes need to be ordered, they can’t easily insert rows in the middle. They either need to allocate pages outside of the regular space, or they need to be reorganized. The same goes for deletion - if you delete rows, then indexes may have holes.
Fragmentation may slow down your queries and you want to avoid it.
You can use [pgstattuple](https://www.postgresql.org/docs/current/pgstattuple.html) to get the metric around fragmentation. To fix the problem, you need to use ***REINDEX***.
### Refreshing Statistics
Outdated statistics negatively affect the queries. The database engine gets misled about the content of the tables and may not use indexes appropriately or pick inefficient execution plans.
To refresh statistics, you use the ***ANALYZE*** command.
### Taking a Backup
Your database is the most precious resource of your business. If you lose data, you lose your clients and your company goes down. Unfortunately, we are never safe. People make mistakes, systems crash, and infrastructure providers fail their SLAs. We always need to take backups and be prepared to restore our systems.
Take your backups periodically. [Read our guide about backups](https://www.metisdata.io/blog/the-essential-guide-to-database-backup-tips-strategies) and do not lose your data.
### Updating Your Database
It’s important to keep your database system up to date. New versions of database engines bring more features, fix bugs, and improve performance. Therefore, stay up to date.
There are many ways to update the database depending on how you host it. If you keep it in the cloud, then it’s probable that your cloud provider handles updates automatically. If you host it on-premise, then you need to take care of updating the operating system, the database, and everything in between. No matter how it’s done, make sure that you don’t fall behind because outdated systems slow you down and pose security risks.
### Checking the Distribution of Values
It’s always a good idea to understand what is in your database. As a data expert, you should understand the business meaning of your data and be able to recognize the values that your business depends on. You should recognize and easily handle things like identifiers, abbreviations, or specific customer codes.
However, things change over time. Your database gets bigger and bigger, you have millions of rows and it’s inevitable that some of the records will be missing data. Empty values can heavily skew your queries, break your machine-learning solutions, or propagate to external systems. The worst is these things may go unnoticed for months. To avoid that, routinely check the distribution of your data. Have some understanding of the business and come up with legit rules like “most of the invoices should have the delivery date”. Next, check these rules and monitor if they significantly change over time. When you introduce a bug, you’ll quickly see the distributions changing which indicates issues with your code or data.
> To ensure data integrity and avoid issues, routinely use Metis to check your data's distribution. Monitor critical metrics like empty values and adherence to business rules, such as invoice delivery dates, to quickly identify and address anomalies.
### Revisiting Indexes Usage
Indexes can [speed up your queries](https://www.metisdata.io/blog/mastering-sql-query-optimization-techniques-for-maximum-database-performance). However, not all queries can benefit from the indexes. Queries must extract proper columns or filter data in specific ways to benefit from indexing.
A typical problem with indexes is that they become unused over time. You change your application, you notice performance issues, you add an index, and then all is good. However, six months later someone else changes the application in a way that the query stops using the index. If the performance is acceptable, then you end up with an index that is not used and nobody notices the problem.
You need to review your indexes periodically and check if they are used. Unused indexes decrease the performance because every data modification needs to update both the table and the index. Drop unused indexes.
### Checking Logs for Attacks
Your database may be attacked. People may try to brute force passwords or look for SQL injection issues. You need to prevent that from happening.
To keep your database safe, you need to review the logs. Go through them periodically and look for unsuccessful connections, weird queries with syntax errors, IP addresses of clients, or authentication issues. All these things may indicate that your database is under attack.
Do not think that you can be safe. Automated robots scan the networks and look for well-known ports. Your database will be attacked sooner or later.
### Looking for Slow Queries
Even if your database works well, you may still have issues that go unnoticed. Slow queries may still be fast enough even though they are inefficient. Reducing the execution time decreases your costs and lets you scale better.
You should routinely check your logs and look for queries that execute for more than 50 milliseconds. Check their execution plans and verify if they are optimal. Fix them if needed.
### Partitioning Your Data
Your business grows over time and it’s common that you don’t need historical entities to run your daily operations. However, these entities may still be scanned by your database engine which doesn’t know that they are old and irrelevant for business as usual.
Look for big tables and partition them based on time. [Read our guide](https://www.metisdata.io/blog/partitioning-made-easy-in-postgresql) to learn how to partition efficiently.
### Verifying a Backup
It’s not enough to take backups. You need to verify the backups as well. It’s often the case that we take backups but we don’t check them, and then they are unusable right when we need them.
Ideally, check every backup. Try recreating the database on the side and see if everything works well. This can be completely automated and protect you from catastrophic issues when the time comes.
## Introducing Metis: Your Automated Solution to Database Health
We shouldn’t do the routine tasks manually. First, it takes time and resources. Second, it’s error-prone. We need to automate as much as possible. Metis can do that for you.
Metis focuses on three aspects: preventing the bad code from reaching production, providing monitoring and observability for your databases, and automatically troubleshooting the issues. For us, monitoring and observability are what we need to automate the routines that keep our database in shape.
Metis can analyze your queries and look for slow queries automatically. It can check the execution plans, detect anomalies, and suggest how to improve the performance. So don’t let a poorly-kept database ruin your business, [let Metis safeguard it for you](https://oauth.app.metisdata.io/oauth/account/sign-up)!
Metis can analyze your schemas, check statistics, and look for fragmentation or dead tuples. This way you don’t need to run your tasks manually. Metis alerts you when things require your attention.
Finally, Metis can track all the interactions with the database to show how they can be optimized. This streamlines the development and lets you avoid rollbacks.
**Metis turns your guessing into a data-driven approach**. It gives you the tools to develop your business with confidence and based on reliable data points. Metis automates tedious tasks, keeps your databases in shape, and lets you focus on your business. Thanks to database-oriented metrics and automated reasoning, Metis can provide a consistent and coherent story of what happened and why your database may be slowing down.
## Making the Case for Investment in Metis
The management may be hesitant to adopt a new tool. There may be reasons to avoid that, especially in mature organizations that already have tools and processes in place. Let’s see that investing in Metis still pays off.
### Your Monitoring Is Not Enough
[Existing monitoring solutions are just not enough](https://www.metisdata.io/blog/all-your-monitoring-solutions-are-just-wrong). They focus on generic metrics instead of database-specific ones. Tools like Datadog, New Relic, AppDynamics, or Dynatrace focus on raw infrastructure metrics that are easy to capture but don’t show the full picture. It’s not enough to show that the CPU spikes. We need to understand the reason and how moving pieces interoperate to cause trouble.
Similarly, monitoring tools swamp you with too many metrics and charts. You need to manually slice and dice them to find the root causes. There is no reasoning that can explain the coherent story.
Metis addresses these cases. [Metis brings database-oriented metrics and can connect the dots from many places](https://www.metisdata.io/blog/observability-vs-monitoring-key-differences-how-they-pair). Effectively, Metis can improve the MTTR and MTBF metrics. Developers can reliably work with the databases, and the operations team is released from manual tasks.
### You Can’t Use Old Solutions For The New World
[The world has changed significantly](https://www.metisdata.io/blog/platform-engineers-must-change-developers-and-databases-and-here-is-how). We have many databases, multi-tenant applications, and hundreds of clusters, and we deploy changes many times a day. We learned DevOps and changed our deployment procedures significantly in the last few years.
However, our maintenance procedures didn’t change much. We still rely on monitoring tools (and we already know they are not enough), we manually debug slow queries, and we still lack understanding of the databases. Just like we changed the way we build and deploy applications, we need to change the way we own and maintain databases.
Metis does exactly that. Metis turns things around by detecting anomalies, automating troubleshooting, and alerting you when things really need your attention. There is no need to look after databases when you have Metis integrated. Metis is like a good maintenance team of DBAs. It can fix issues before they even manifest themselves.
### Developers Don’t Have Tools For Maintaining Databases
Developers tend to claim that they test their solutions whereas [in fact they don’t](https://www.metisdata.io/blog/you-must-test-your-databases-and-here-is-how). They focus on the correctness of the data, but they ignore the performance and implications over time. This leads to long deployments, rollbacks, and reluctance to deploy changes.
Metis can help with that. Developers can own their databases and can reliably develop, maintain, and fix them. **This effectively reduces the work of developers**! While they own another scope (database maintenance), they have less work to be done because they can do that on their own. They don’t need to interact with other teams, they don’t need to wait for approvals or logs, and they don’t need to communicate. They can own everything end-to-end. What’s more, we can reduce the number of teams or unlock people to do more.
## Conclusion
Neglecting database maintenance is a recipe for failure. You can’t let your database go down because it will bring down your whole business. There are many tasks that you should perform periodically to make sure that your database runs well.
Most of these tasks can be automated. Metis does exactly that. Metis can protect your databases from bad code modifications, slow queries, inefficient configurations, and breaking changes. You can deploy Metis in no time and get proactively notified when there are issues.
Take the next step in safeguarding your company. Use Metis and never go blind again.
## FAQs
### How can database optimization improve my company's bottom line?
Many companies lost their clients due to database issues. GitLab, Sony, or Heroku are just some of the examples. If your database is slow or unreliable, then your clients will move to other companies and you will get out of business.
### What are the most common database bugs and how can they be prevented?
Most issues are around invalid configuration, bad data types, lack of indexes, or inefficient database schema. They can all be prevented by routinely checking how your database performs and fixing issues as you go.
### What routine database tasks should be prioritized for optimal performance?
You should vacuum and defragment your databases. You should keep it up to date and install all the updates. You should refresh statistics, look for slow queries, and revisit the usage of the indexes. Finally, you should backup your database and always make sure that the backups are correct. | adammetis |
1,875,728 | Building a CRUD Application with Node.js, Express, and MySQL | In this blog, we'll walk through creating a simple CRUD (Create, Read, Update, Delete) application... | 0 | 2024-06-06T08:00:00 | https://dev.to/manthanank/building-a-crud-application-with-nodejs-express-and-mysql-4d2m | webdev, javascript, beginners, programming | In this blog, we'll walk through creating a simple CRUD (Create, Read, Update, Delete) application using Node.js, Express, and MySQL. This tutorial will guide you through setting up the project, configuring the database, and implementing the CRUD operations.
## Project Setup
### Step 1: Initializing the Project
Create a new directory for your project and initialize it with npm:
```bash
mkdir crud-nodejs
cd crud-nodejs
npm init -y
```
Install the necessary dependencies:
```bash
npm install express mysql2 dotenv body-parser
npm install --save-dev nodemon
```
### Step 2: Project Structure
Create the following project structure:
```
crud-nodejs
├── config
│ └── database.js
├── controllers
│ └── todoController.js
├── middleware
│ └── errorMiddleware.js
├── models
│ └── todo.js
├── routes
│ └── todoRoutes.js
├── .env.example
├── index.js
└── package.json
```
### Step 3: Configuring Environment Variables
Create a `.env` file (copy from `.env
.example`):
```bash
cp .env.example .env
```
Fill in your MySQL database credentials in the `.env` file:
```
PORT=3000
DB_HOST=localhost
DB_USER=your_user
DB_PASSWORD=your_password
DB_DATABASE=your_database
```
### Step 4: Connecting to MySQL
In `config/database.js`, we set up the MySQL connection using the `mysql2` package:
```js
const mysql = require('mysql2');
require('dotenv').config();
const connection = mysql.createConnection({
host: process.env.DB_HOST,
user: process.env.DB_USER,
password: process.env.DB_PASSWORD,
database: process.env.DB_DATABASE
});
connection.connect((err) => {
if (err) throw err;
console.log('Connected to MySQL database');
});
module.exports = connection;
```
### Step 5: Creating the Express Server
In `index.js`, we configure the Express server and set up the routes and error handling middleware:
```js
const express = require('express');
const bodyParser = require('body-parser');
const todoRoutes = require('./routes/todoRoutes');
const errorMiddleware = require('./middleware/errorMiddleware');
require('dotenv').config();
const app = express();
const PORT = process.env.PORT || 3000;
// Middleware
app.use(bodyParser.json());
// Routes
app.use('/todos', todoRoutes);
// Error middleware
app.use(errorMiddleware);
// Start the server
app.listen(PORT, () => {
console.log(`Server is running on http://localhost:${PORT}`);
});
```
### Step 6: Defining the Todo Model
In `models/todo.js`, we define the functions to interact with the MySQL database:
```js
const db = require('../config/database');
exports.getAllTodos = function(callback) {
db.query('SELECT * FROM todos', callback);
};
exports.getTodoById = function(id, callback) {
db.query('SELECT * FROM todos WHERE id = ?', [id], callback);
};
exports.createTodo = function(newTodo, callback) {
db.query('INSERT INTO todos SET ?', newTodo, callback);
};
exports.updateTodo = function(id, updatedTodo, callback) {
db.query('UPDATE todos SET ? WHERE id = ?', [updatedTodo, id], callback);
};
exports.deleteTodo = function(id, callback) {
db.query('DELETE FROM todos WHERE id = ?', [id], callback);
};
```
### Step 7: Creating the Controller
In `controllers/todoController.js`, we define the logic for handling CRUD operations:
```js
const Todo = require('../models/todo');
exports.getAllTodos = function(req, res) {
Todo.getAllTodos((err, todos) => {
if (err) throw err;
res.json(todos);
});
};
exports.getTodoById = function(req, res) {
Todo.getTodoById(req.params.id, (err, todo) => {
if (err) throw err;
res.json(todo);
});
};
exports.createTodo = function(req, res) {
const newTodo = {
title: req.body.title,
completed: req.body.completed
};
Todo.createTodo(newTodo, (err, result) => {
if (err) throw err;
res.json({ message: 'Todo created successfully' });
});
};
exports.updateTodo = function(req, res) {
const updatedTodo = {
title: req.body.title,
completed: req.body.completed
};
Todo.updateTodo(req.params.id, updatedTodo, (err, result) => {
if (err) throw err;
res.json({ message: 'Todo updated successfully' });
});
};
exports.deleteTodo = function(req, res) {
Todo.deleteTodo(req.params.id, (err, result) => {
if (err) throw err;
res.json({ message: 'Todo deleted successfully' });
});
};
```
### Step 8: Defining Routes
In `routes/todoRoutes.js`, we set up the routes for the Todo API:
```js
const express = require('express');
const router = express.Router();
const todoController = require('../controllers/todoController');
// Routes
router.get('/', todoController.getAllTodos);
router.get('/:id', todoController.getTodoById);
router.post('/', todoController.createTodo);
router.put('/:id', todoController.updateTodo);
router.delete('/:id', todoController.deleteTodo);
module.exports = router;
```
### Step 9: Error Handling Middleware
In `middleware/errorMiddleware.js`, we define a simple error handling middleware:
```js
module.exports = function errorHandler(err, req, res, next) {
console.error(err.stack);
res.status(500).send('Something broke!');
};
```
### Step 10: Running the Application
Add the following scripts to `package.json`:
```json
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"dev": "nodemon index.js",
"start": "node index.js"
}
```
Start the application in development mode:
```bash
npm run dev
```
## Conclusion
You now have a fully functional CRUD application built with Node.js, Express, and MySQL. This application allows you to create, read, update, and delete Todo items. This basic structure can be expanded and customized to fit more complex requirements. Happy coding!
## Exploring the Code
Visit the [GitHub repository](https://github.com/manthanank/crud-nodejs/tree/mysql) to explore the code in detail.
---
| manthanank |
1,878,933 | Programming Assignment Help Released: 10 Essential Tips for Students | In today's technology-driven world, mastering programming languages is a crucial skill for students... | 0 | 2024-06-06T07:55:26 | https://dev.to/julia_ann_103d13c078e79b0/programming-assignment-help-released-10-essential-tips-for-students-41ic | programming, assignment, help, service | In today's technology-driven world, mastering programming languages is a crucial skill for students pursuing careers in computer science, engineering, and related fields. However, navigating through complex programming assignments can often be daunting and overwhelming for many students.
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Placing an order is simple. Visit our website programmingassignmenthelp.uk, fill out the order form with your assignment details, and make a payment. Our team will then assign a suitable expert to assist you.
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1,878,932 | Crafting Cohesion: The Art of Masking Tape Solutions | Crafting Cohesion: the creative art which was imaginative of Tape Alternatives Did your ever listen... | 0 | 2024-06-06T07:54:48 | https://dev.to/ronald_woodgo_ba03f686524/crafting-cohesion-the-art-of-masking-tape-solutions-5f62 | design |
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1,878,931 | Introducing the adaptive moving average KAMA | As the name implies, the Moving Average (KAMA) belongs to the Moving Average category, but unlike the... | 0 | 2024-06-06T07:53:01 | https://dev.to/fmzquant/introducing-the-adaptive-moving-average-kama-4cj9 | trading, cryptocurrency, fmzquant, average | As the name implies, the Moving Average (KAMA) belongs to the Moving Average category, but unlike the traditional moving average, it is way “smarter” than normal MA. We know that the MA has many shortcomings. For example, the short-term moving average is close to the price trend, which is very sensitive, but it is easy to produce false signals. The long-term moving average is very accurate in the trend capture, but often react very slow when the market price has moved for a while.
KAMA's "smartness" is reflected in the fact that it can be based on the current market state, that is, the volatility, to adjust the sensitivity. The form of its realization is: in the shock market, the change of KAMA is obviously slowed down; when the trend comes, it will quickly react.
The benefits are: it can reduce the transaction costs caused by the price "in-day moves", and can get on the trend in time when the market takes off.
## KAMA in the chart
## KAMA calculation method
- Direction (DIR) = closing price - closing price before n days
- Volatility (VIR) = sum(abs (closing price - closing price of the previous trading day), n)
- Efficiency (ER) = direction / volatility
- Fast = 2 / (n1 + 1)
- Slow = 2 / (n2 + 1)
- Smooth (CS) = efficiency * (fast - slow) + slow
- Coefficient (CQ) = smooth * smooth
- KAMA = exponentially weighted average (dynamic moving average (closing price, coefficient), 2)
Among them, n, n1, and n2 are periodic parameters. By default, the number of n cycles is 10, n1 is the number of short-term cycles is 2, and n2 is the number of long-term cycles is 30. This is also a set of parameters agreed by KAMA author Perry Kaufman, n is used for direction and volatility calculation efficiency, n1 and n2 are the number of periods of fast moving average and slow moving average. Theoretically, the larger the parameter of n1, the smoother KAMA.
KAMA is calculated by first calculating the direction (DIR) and the volatility (VIR), then calculating the efficiency in proportion according to these two. Efficiency (ER) is a measure of the degree of price change and is calculated in a simple way: direction / volatility. The calculation result is between 0 and 1. When the value of ER is closer to 0, the market is in a state of oscillation. When the value of ER is closer to 1, the market is in a trend state.
When calculating the efficiency (ER), the smoothing constant (CS) can be derived by combining the fast moving average and the slow moving average:
efficiency * (fast - slow) + slow
CS represents the speed of the trend operation. According to the calculation formula of CS, we can find that the change of CS is always proportional to the change of ER.
Then the coefficient (CQ) is calculated according to the smoothed power, and the purpose is to make the slow cycle parameter play a more important role in the calculation, which is also a more conservative approach.
The final smoothness of KAMA is determined by the coefficient (CQ). In the calculation of KAMA, the coefficient (CQ) determines the periodic parameters of the last two moving average smoothing, namely: exponential weighted average (dynamic moving average (closing price, coefficient), 2).
## How to use KAMA
Although KAMA's calculation method is very complicated, the usage method is similar to the ordinary moving average. In practical applications, it can not only judge the market trend, but also can be used for precise trading points. Because it is very "smart", it can be used in many trading targets, even in cryptocurrency market.
- When the price is greater than KAMA and KAMA is up, the long position is opened.
- When the price is less than KAMA and KAMA is down, the short position is opened.
- When the price is less than KAMA, or KAMA is down, the long position is closed.
- When the price is greater than KAMA, or KAMA is up, the short position is closed.
## Building a trading strategy based on KAMA
**Step 1: calculate KAMA**
Note that in the upper left corner, please select the programming language: My language. There is already a ready-made KAMA in the talib library, but it has only one external parameter (n) cycle, and n1 and n2 have defaulted to 2 and 30.
The strategies in this article are only used as references. Readers with strong programming ability can write their own. During the My language programming process, we can also mix with the JavaScript language, pay attention to the following code:
```
%% // Standard format for JavaScript within My language
scope.KAMA = function() {
var r = _C(exchange.GetRecords); // Get the K line array
if (r.length > 140) { // filter the length of the K line
var kama = talib.KAMA(r, 140); // Call talib library to calculate KAMA
Return kama[kama.length - 2]; // return the specific value of KAMA
}
Return;
}
%% // Standard format for JavaScript within My language
```
**Step 2: Calculate the trading conditions and place an order**
```
%%
scope.KAMA = function() {
var r = _C(exchange.GetRecords);
if (r.length > 140) {
var kama = talib.KAMA(r, 140);
Return kama[kama.length - 2];
}
Return;
}
%%
K^^KAMA; // Print KAMA on the chart
A:CLOSE; // print the closing price on the chart
K > REF(K, 1) && CLOSE > K,BK; // Open long position
K < REF(K, 1) && CLOSE < K,SK; // Open short position
K < REF(K, 1) || CLOSE < K,SP; // close long position
K > REF(K, 1) || CLOSE > K,BP; // close short position
```
**Step 3: Set the strategy signal filtering method**
```
%%
scope.KAMA = function() {
var r = _C(exchange.GetRecords);
if (r.length > 140) {
var kama = talib.KAMA(r, 140);
Return kama[kama.length - 2];
}
Return;
}
%%
K^^KAMA;
A:CLOSE;
K > REF(K, 1) && CLOSE > K,BK;
K < REF(K, 1) && CLOSE < K,SK;
K < REF(K, 1) || CLOSE < K,SP;
K > REF(K, 1) || CLOSE > K,BP;
AUTOFILTER; // Enable one open and one close signal filtering mechanism
```
## Strategy backtest
In order to get closer to the real trading environment, we used the 2 pips of slippage to test the pressure in the actual trading. The test environment is as follows:
- Exchange: BitMEX
- Trading variety: XBTUSD
- Time: July 01, 2017 ~ July 01, 2019
- K line cycle: daily line
- Slippage: 2 pips for opening and closing positions
**Backtest environment**
**Profit Details**
**Fund curve**
From the above backtest results, this simple KAMA strategy really live up to expectations. Even in the super-big bear market of the cryptocurrency in 2018, the capital curve did not show a large retracement, and there was no repeatedly open and close position in the long-term shock period in the market causing unnecessary losses. At the later time, there is a very good performance in the bull market in 2019.
## Strategy source code
For more information, please check us at : https://www.fmz.com/strategy/155663
## Summary
An excellent strategy that can be a firm strategy must be polished. The strategies in this article have a lot of space to optimize and upgrade, such as adding certain filtering conditions, active stop-loss and stop-loss conditions. As a kind of moving average, KAMA inherits the advantages and disadvantages of ordinary moving averages and at the same time sublimates. In an unpredictable market, even if you fix a "best parameter", it is difficult to adapt to the future market. Therefore, this method of changing with the trend and changing with the market may be a better choice.
From: https://blog.mathquant.com/2019/07/24/introducing-the-adaptive-moving-average-kama.html | fmzquant |
1,878,927 | Core Architectural components of Microsoft Azure | Introduction Microsoft Azure relies on a few key architectural components to provide redundancy and... | 0 | 2024-06-06T07:48:59 | https://dev.to/mabis12/core-architectural-components-of-microsoft-azure-4323 | azure, cloudcomputing, arm | **Introduction**
Microsoft Azure relies on a few key architectural components to provide redundancy and high availability. Core Azure architectural components include Azure regions, Azure Availability Zones, resource groups, and the Azure Resource Manager.
Here are the core architectural components of Azure:
**Azure Regions**
An Azure region refers to an area within a geography that contains one or more Azure data centers.
**Azure Availability Zones**
Availability Zones is an Azure offering that is used to protect applications and data centers from data center failures. Each Availability Zone is a unique physical location within an Azure region, and each zone is supported by one or more data centers, equipped with their own independent power, cooling, and networking infrastructure.
**Resource Groups in Azure**
Resource groups are logical containers in Azure. They hold related Azure resources that are part of a larger Azure solution. These resource groups can host all resources that comprise an overall Azure solution, or they can also host just the resources that need to be managed as part of a group. The administrator gets to decide, based on needs, how to allocate resources in resource groups within Azure.
Azure Resource Manager
Within Azure, there are several underlying components that provide the infrastructure for an application or service that’s been deployed in Azure. For example, a solution deployed in Azure might consist of a virtual machine or two that run an application, a storage account that’s used to host storage for the application, an Azure web app that provides the front end for the application, and maybe even a database, which is running on a SQL server.
**Inconclusion**
By understanding these key architectural components, you will have a better understanding of how Azure solutions are built and supported
| mabis12 |
1,878,926 | [AIAnsible]Using Ansible to Deploy Kubernetes --- Detailed Explanation of Kubespray Source Code (Part One) | Using Ansible to Deploy Kubernetes --- Detailed Explanation of Kubespray Source Code (Part... | 0 | 2024-06-06T07:48:27 | https://dev.to/a_jun_1d592a39703eed80f31/using-ansible-to-deploy-kubernetes-detailed-explanation-of-kubespray-source-code-part-one-3ab6 | # Using Ansible to Deploy Kubernetes --- Detailed Explanation of Kubespray Source Code (Part One)
- Some content is generated by AIAnsible by calling Ansible tasks in debug mode.
- The repository for AIAnsible is available at: [https://github.com/sunnycloudy/aiansible](https://github.com/sunnycloudy/aiansible)
Kubespray is an open-source project that uses Ansible as an automation tool for installing, upgrading, and configuring Kubernetes clusters. As an infrastructure engineer or DevOps engineer, here are three reasons why you should read the Kubespray source code:
1. **In-depth Understanding of Kubernetes Deployment Process**:
Reading the Kubespray source code can help you gain a deep understanding of how Kubernetes clusters are automatedly deployed and managed. This includes understanding the details of cluster initialization, node joining, network policy configuration, storage setup, and the deployment of key components such as authentication and authorization. This knowledge is invaluable for developers and operations engineers who want to master the lifecycle management of Kubernetes clusters.
2. **Learning Ansible Automation Best Practices**:
Kubespray uses Ansible as its automation tool, and its source code contains numerous best practices and patterns for Ansible. By reading the source code, you can learn how to write Ansible playbooks, roles, and handle complex configuration tasks. This is extremely beneficial for anyone looking to improve their skills in configuration management and automation.
3. **Customization and Optimization of Kubernetes Cluster Deployment**:
If you need to customize or optimize your Kubernetes cluster, reading the Kubespray source code can help you understand how to modify existing Ansible playbooks and roles to meet your needs. This could include adding new features, modifying network configurations, integrating additional services, or optimizing performance. Understanding the source code allows you to make effective customizations, ensuring that the cluster deployment meets your specific requirements.
Additionally, being familiar with the Kubespray source code can help you contribute to open-source projects like Kubespray, improve the project, and expand your technical horizons while building connections within the open-source community.
### Kubespray Version Used in This Article:
```
v2.22.2
```
### ansible version:
```
ansible [core 2.12.10]
config file = /root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/ansible.cfg
configured module search path = ['/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/library']
ansible python module location = /opt/conda/lib/python3.9/site-packages/ansible
ansible collection location = /root/.ansible/collections:/usr/share/ansible/collections
executable location = /opt/conda/bin/ansible
python version = 3.9.18 (main, Sep 11 2023, 13:41:44) [GCC 11.2.0]
jinja version = 3.1.2
libyaml = True
```
### host info:
| hostname | ansible_host | ansible_user | os | cpu| ram|
| ------ | ------------- | ------------ | -- | --| --|
| test1 | 192.168.121.91 | root | CentOS8| 6c| 8g|
| test2 | 192.168.121.92 | root | CentOS8| 6c| 8g|
| test3 | 192.168.121.95 | root | CentOS8| 6c| 8g|
### inventory
```
test1 ansible_host=192.168.121.91 ansible_user=root ip=192.168.121.91 etcd_member_name=etcd1
test2 ansible_host=192.168.121.92 ansible_user=root ip=192.168.121.92 etcd_member_name=etcd2
test3 ansible_host=192.168.121.95 ansible_user=root ip=192.168.121.95 etcd_member_name=etcd3
[kube_control_plane]
test1
test2
test3
[etcd]
test1
test2
test3
[kube_node]
test1
test2
test3
[calico_rr]
[k8s_cluster:children]
kube_control_plane
kube_node
calico_rr
```
<**STEP**: 1>
kubespray/playbooks/ansible_version.yml #11
```
[ code and comment: ]
11| - name: "Check {{ minimal_ansible_version }} <= Ansible version < {{ maximal_ansible_version }}" # This line defines a task with a descriptive name to check the Ansible version against specified minimum and maximum versions.
12| assert: # The assert keyword is used to perform a test and raise an error if the test fails.
13| msg: "Ansible must be between {{ minimal_ansible_version }} and {{ maximal_ansible_version }} exclusive" # This message is displayed if the assert condition fails, indicating the required version range for Ansible.
14| that: # This keyword is followed by a list of conditions that must be met for the assert to pass.
15| - ansible_version.string is version(minimal_ansible_version, ">=") # Asserts that the Ansible version is greater than or equal to the minimal version specified.
16| - ansible_version.string is version(maximal_ansible_version, "<") # Asserts that the Ansible version is less than the maximal version specified.
17| tags: # The tags keyword is used to assign tags to the task, which can be used for selective execution or organization.
18| - check # This tag is applied to the task, allowing it to be executed selectively when the 'check' tag is specified.
```
[params:]
```
msg: Ansible must be between 2.11.0 and 2.13.0 exclusive
that: ['ansible_version.string is version(minimal_ansible_version, ">=")', 'ansible_version.string is version(maximal_ansible_version, "<")']
```
<**STEP**: 2>
kubespray/playbooks/ansible_version.yml #20
```
[ code and comment: ]
20| - name: "Check that python netaddr is installed" # This task is named to check if the python netaddr module is installed.
21| assert: # The assert module is used here to perform a check and provide a message if the condition is not met.
22| msg: "Python netaddr is not present" # The message that will be displayed if the python netaddr module is not found.
23| that: "'127.0.0.1' | ipaddr" # The condition to check if the string '127.0.0.1' can be used with the ipaddr filter, indicating that the netaddr module is available.
24| tags: # Tags are used to label the task for selective execution or categorization.
25| - check # The task is tagged with 'check', which can be used to execute this task or a group of tasks with this tag.
```
[params:]
```
msg: Python netaddr is not present
that: '127.0.0.1' | ipaddr
```
<**STEP**: 3>
kubespray/playbooks/ansible_version.yml #28
```
[ code and comment: ]
28| - name: "Check that jinja is not too old (install via pip)" # This task is named to check the Jinja version and ensure it is not too old, recommending installation via pip if necessary.
29| assert: # The assert module is used to check if certain conditions are met.
30| msg: "Your Jinja version is too old, install via pip" # The error message that will be displayed if the Jinja version is too old.
31| that: "{% set test %}It works{% endset %}{{ test == 'It works' }}" # A Jinja2 template test to ensure the Jinja version is functioning correctly.
32| tags: # Tags are used to categorize tasks for selective execution.
33| - check # The task is tagged with 'check', indicating it is a check task that can be executed selectively.
```
[params:]
```
msg: Your Jinja version is too old, install via pip
that: True
```
<**STEP**: 4>
kubespray/roles/bootstrap-os/tasks/bootstrap-centos.yml #7
```
[ code and comment: ]
7|- name: Add proxy to yum.conf or dnf.conf if http_proxy is defined # Task to add a proxy configuration to yum.conf or dnf.conf based on the http_proxy variable.
8| ini_file: # The ini_file module is used to manipulate INI-style files.
9| path: "{{ ( (ansible_distribution_major_version | int) < 8) | ternary('/etc/yum.conf','/etc/dnf/dnf.conf') }}" # Determines the path to the configuration file based on the major version of the distribution.
10| section: main # The section in the configuration file where the proxy setting will be added.
11| option: proxy # The option in the configuration file to set the proxy.
12| value: "{{ http_proxy | default(omit) }}" # The value for the proxy option, using the http_proxy variable or omitting if not defined.
13| state: "{{ http_proxy | default(False) | ternary('present', 'absent') }}" # The state of the proxy setting, present if http_proxy is defined, otherwise absent.
14| no_extra_spaces: true # Ensures that no extra spaces are included in the configuration file.
15| mode: 0644 # Sets the file permissions to 0644.
16| become: true # The task requires root privileges.
17| when: not skip_http_proxy_on_os_packages # The task is only executed if the skip_http_proxy_on_os_packages is not set to true.
```
[params:]
```
path: /etc/dnf/dnf.conf
section: main
option: proxy
state: absent
no_extra_spaces: True
mode: 420
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: ini_file
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642256.6176965-22586-124692463853214/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 5>
kubespray/roles/bootstrap-os/tasks/bootstrap-centos.yml #91
```
[ code and comment: ]
91|- name: Check presence of fastestmirror.conf # This task is named to check if the file fastestmirror.conf exists.
92| stat: # The 'stat' module is used to get information about the file.
93| path: /etc/yum/pluginconf.d/fastestmirror.conf # Specifies the path to the file to check.
94| get_attributes: no # Indicates not to retrieve the file attributes.
95| get_checksum: no # Indicates not to retrieve the file checksum.
96| get_mime: no # Indicates not to retrieve the file's MIME type.
97| register: fastestmirror # The result of the stat operation will be stored in the 'fastestmirror' variable.
```
[params:]
```
path: /etc/yum/pluginconf.d/fastestmirror.conf
get_attributes: False
get_checksum: False
get_mime: False
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: stat
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642286.3840618-24185-135926824661667/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 6>
kubespray/roles/bootstrap-os/tasks/bootstrap-centos.yml #113
```
[ code and comment: ]
113|- name: Install libselinux python package # This task is named to install the libselinux python package.
114| package: # The package module is used to manage packages on the system.
115| name: "{{ ( (ansible_distribution_major_version | int) < 8) | ternary('libselinux-python','python3-libselinux') }}" # The name of the package to install is determined based on the major version of the distribution. If the major version is less than 8, 'libselinux-python' is installed, otherwise 'python3-libselinux'.
116| state: present # The state is set to 'present' to ensure the package is installed.
117| become: true # The task requires elevated privileges, hence 'become' is set to true to execute with root permissions.
```
[params:]
```
name: python3-libselinux
state: present
```
<**STEP**: 7>
kubespray/roles/bootstrap-os/tasks/main.yml #42
```
[ code and comment: ]
42|- name: Create remote_tmp for it is used by another module # This task is named to create a remote temporary directory which is required by another module.
43| file: # The 'file' module is used to manage files and directories.
44| path: "{{ ansible_remote_tmp | default('~/.ansible/tmp') }}" # The path for the directory is defined, with a default fallback to '~/.ansible/tmp' if 'ansible_remote_tmp' is not set.
45| state: directory # Ensures that the specified path is a directory.
46| mode: 0700 # Sets the directory's permissions to 0700, which is read, write, and execute permissions for the owner only.
```
[params:]
```
path: ~/.ansible/tmp
state: directory
mode: 448
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: file
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642415.2451587-30859-39757558046314/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 8>
kubespray/roles/bootstrap-os/tasks/main.yml #50
```
[ code and comment: ]
50|- name: Gather host facts to get ansible_os_family # This task is named to gather host facts, specifically to retrieve the 'ansible_os_family' variable.
51| setup: # The 'setup' module is used to gather information about the system on which the task is run.
52| gather_subset: '!all' # The 'gather_subset' option is set to '!all' to negate the default behavior and gather only a subset of facts.
53| filter: ansible_* # The 'filter' option is used to specify that only facts that start with 'ansible_' should be gathered.
```
[params:]
```
gather_subset: !all
filter: ansible_*
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: setup
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642434.3098886-31866-265638705868642/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 9>
kubespray/roles/bootstrap-os/tasks/main.yml #55
```
[ code and comment: ]
55|- name: Assign inventory name to unconfigured hostnames (non-CoreOS, non-Flatcar, Suse and ClearLinux, non-Fedora) # Assigns a hostname from inventory to systems that are not CoreOS, Flatcar, Suse, ClearLinux, or Fedora.
56| hostname: # The hostname module is used to set or change the system's hostname.
57| name: "{{ inventory_hostname }}" # Sets the hostname to the value of the inventory_hostname variable.
58| when: # The task is only executed if the following conditions are met.
59| - override_system_hostname # A variable that, when true, allows overriding the system's hostname.
60| - ansible_os_family not in ['Suse', 'Flatcar', 'Flatcar Container Linux by Kinvolk', 'ClearLinux'] # Ensures the task is not run on Suse, Flatcar, or ClearLinux systems.
61| - not ansible_distribution == "Fedora" # Excludes Fedora from having its hostname overridden.
62| - not is_fedora_coreos # Ensures the task is not run on systems that are Fedora CoreOS.
```
[params:]
```
name: test3
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: hostname
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642452.111304-344-21241785401700/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 10>
kubespray/roles/bootstrap-os/tasks/main.yml #94
```
[ code and comment: ]
94|- name: Ensure bash_completion.d folder exists # This task ensures that the bash_completion.d directory exists.
95| file: # The file module is used for managing files, directories, and links.
96| name: /etc/bash_completion.d/ # The path to the directory that needs to be managed.
97| state: directory # Ensures that the specified path is a directory.
98| owner: root # Sets the owner of the directory to root.
99| group: root # Sets the group ownership of the directory to root.
100| mode: 0755 # Sets the permissions of the directory to 0755, which allows the owner full permissions, group and others read and execute permissions.
```
[params:]
```
name: /etc/bash_completion.d/
state: directory
owner: root
group: root
mode: 493
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: file
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642476.0681832-1651-47771645735141/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 11>
kubespray/playbooks/facts.yml #29
```
[ code and comment: ]
29| - name: Gather necessary facts (network) # This task is named to gather only the network-related facts.
30| setup: # The 'setup' module is used to gather facts about the system.
31| gather_subset: '!all,!min,network' # This option specifies to gather only the 'network' facts, excluding 'all' and 'min' subsets.
32| filter: "ansible_*_ipv[46]*" # This filter is applied to select only facts that match the pattern, which in this case is related to IPv4 and IPv6 addresses.
```
[params:]
```
gather_subset: !all,!min,network
filter: ansible_*_ipv[46]*
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: setup
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642499.5156522-3137-205620002257081/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 12>
kubespray/playbooks/facts.yml #37
```
[ code and comment: ]
37| - name: Gather necessary facts (hardware) # This task is named to gather specific hardware-related facts from the system.
38| setup: # The setup module is used to gather facts about the system.
39| gather_subset: '!all,!min,hardware' # This option specifies that only the 'hardware' subset of facts should be gathered, excluding 'all' and 'min'.
40| filter: "ansible_*total_mb" # This filter specifies that only facts with keys that match the pattern 'ansible_*total_mb' should be included in the gathered facts.
```
[params:]
```
gather_subset: !all,!min,hardware
filter: ansible_*total_mb
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: setup
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642516.1441417-4049-127803497571242/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 13>
kubespray/roles/kubernetes/preinstall/tasks/0010-swapoff.yml #12
```
[ code and comment: ]
12|- name: check swap # This task is named to check the status of swap on the system.
13| command: /sbin/swapon -s # The command module is used here to execute the 'swapon -s' command, which reports the current swap space usage.
14| register: swapon # The output of the command is registered to a variable named 'swapon' for later use.
15| changed_when: no # This flag ensures that the task is always considered unchanged, regardless of the command's output.
```
[params:]
```
_raw_params: /sbin/swapon -s
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: ansible.legacy.command
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642557.4197576-6489-162053332755449/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 14>
kubespray/roles/kubernetes/preinstall/tasks/0020-set_facts.yml #24
```
[ code and comment: ]
24|- name: check if booted with ostree # This task is named to check if the system has booted using ostree.
25| stat: # The 'stat' module is used to gather information about a file or directory.
26| path: /run/ostree-booted # The path to the file that is being checked.
27| get_attributes: no # This option is set to 'no' to indicate that file attributes should not be retrieved.
28| get_checksum: no # This option is set to 'no' to indicate that the checksum of the file should not be retrieved.
29| get_mime: no # This option is set to 'no' to indicate that the MIME type of the file should not be retrieved.
30| register: ostree # The result of the 'stat' module will be stored in the variable 'ostree'.
```
[params:]
```
path: /run/ostree-booted
get_attributes: False
get_checksum: False
get_mime: False
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: stat
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642576.5248625-7488-133739276387859/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 15>
kubespray/roles/kubernetes/preinstall/tasks/0020-set_facts.yml #95
```
[ code and comment: ]
95|- name: NetworkManager # This task is named to check if NetworkManager is installed and active on the host.
96| # noqa 303 Should we use service_facts for this? # This comment suggests that there is a discussion or consideration about whether to use the 'service_facts' module instead of the 'systemctl' command.
97| command: systemctl is-active --quiet NetworkManager.service # The command module is used here to run the 'systemctl' command to check if the NetworkManager service is active.
98| register: networkmanager_enabled # The output of the command is stored in the 'networkmanager_enabled' variable for later use.
99| failed_when: false # This ensures that the task will never report a failure, regardless of the command's exit status.
100| changed_when: false # This ensures that the task will never report a change, indicating that it does not make any modifications to the system.
101| check_mode: false # This tells Ansible that this task should not be run in check mode, which means it will execute the command instead of just simulating it.
```
[params:]
```
_raw_params: systemctl is-active --quiet NetworkManager.service
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: ansible.legacy.command
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642619.7917168-9988-112438307632560/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 16>
kubespray/roles/kubernetes/preinstall/tasks/0020-set_facts.yml #103
```
[ code and comment: ]
103|- name: check systemd-resolved # This task is named to check the status of the systemd-resolved service.
104| # noqa 303 Should we use service_facts for this? # This comment suggests that there is a consideration about whether to use the service_facts module instead.
105| command: systemctl is-active systemd-resolved # The command module is used to run a command that checks if systemd-resolved is active.
106| register: systemd_resolved_enabled # The command's output is stored in the variable systemd_resolved_enabled.
107| failed_when: false # This ensures that the task will not be marked as failed regardless of the command's outcome.
108| changed_when: false # This ensures that the task will not be marked as changed regardless of the command's outcome.
109| check_mode: no # This specifies that the task should not be run in check mode, which means it will perform the actual action instead of a dry run.
```
[params:]
```
_raw_params: systemctl is-active systemd-resolved
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: ansible.legacy.command
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642639.462811-11036-248730951510072/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 17>
kubespray/roles/kubernetes/preinstall/tasks/0020-set_facts.yml #168
```
[ code and comment: ]
168|- name: check if /etc/dhcp/dhclient.conf exists # This task is named to check for the existence of the file /etc/dhcp/dhclient.conf.
169| stat: # The 'stat' module is used to gather information about the file.
170| path: /etc/dhcp/dhclient.conf # Specifies the path to the file that will be checked.
171| get_attributes: no # Indicates that file attributes should not be retrieved.
172| get_checksum: no # Indicates that the file checksum should not be retrieved.
173| get_mime: no # Indicates that the file's MIME type should not be retrieved.
174| register: dhcp_dhclient_stat # The variable 'dhcp_dhclient_stat' will hold the result of the 'stat' module.
```
[params:]
```
path: /etc/dhcp/dhclient.conf
get_attributes: False
get_checksum: False
get_mime: False
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: stat
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642676.8299215-13136-68095510686394/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 18>
kubespray/roles/kubernetes/preinstall/tasks/0020-set_facts.yml #181
```
[ code and comment: ]
181|- name: target dhclient hook file for Red Hat family # This task is named to specify the file path for the dhclient hook for systems in the Red Hat family.
182| set_fact: # This module is used to set a variable for later use in the playbook.
183| dhclienthookfile: /etc/dhcp/dhclient.d/zdnsupdate.sh # The variable 'dhclienthookfile' is set to the path of the dhclient hook script for DNS updates.
184| when: ansible_os_family == "RedHat" # The task is only executed if the target system belongs to the 'RedHat' family, as determined by the 'ansible_os_family' fact.
```
[params:]
```
dhclienthookfile: /etc/dhcp/dhclient.d/zdnsupdate.sh
```
<**STEP**: 19>
kubespray/roles/kubernetes/preinstall/tasks/0040-verify-settings.yml #25
```
[ code and comment: ]
25|- name: Stop if the os does not support # This task is named to stop the execution if the operating system does not support the required setup.
26| assert: # The assert module is used to make sure that certain conditions are met before proceeding.
27| that: (allow_unsupported_distribution_setup | default(false)) or ansible_distribution in supported_os_distributions # The condition checks if either the setup is allowed for unsupported distributions or if the current distribution is in the list of supported ones.
28| msg: "{{ ansible_distribution }} is not a known OS" # The message that will be displayed if the assertions fail, indicating that the current OS is not recognized.
29| when: not ignore_assert_errors # The task will only run if the variable 'ignore_assert_errors' is not set to true, ensuring that assertion errors are not ignored.
```
[params:]
```
that: (allow_unsupported_distribution_setup | default(false)) or ansible_distribution in supported_os_distributions
msg: CentOS is not a known OS
```
<**STEP**: 20>
kubespray/roles/kubernetes/preinstall/tasks/0040-verify-settings.yml #31
```
[ code and comment: ]
31|- name: Stop if unknown network plugin # This task is named to stop the process if an unknown network plugin is specified.
32| assert: # The assert module is used to make sure that the condition is met.
33| that: kube_network_plugin in ['calico', 'flannel', 'weave', 'cloud', 'cilium', 'cni', 'kube-ovn', 'kube-router', 'macvlan', 'custom_cni'] # Ensures that the kube_network_plugin is one of the listed supported plugins.
34| msg: "{{ kube_network_plugin }} is not supported" # The message to be displayed if the assertion fails, indicating the plugin is not supported.
35| when: # Defines the conditions under which the assertion should be performed.
36| - kube_network_plugin is defined # The first condition checks if the kube_network_plugin variable is defined.
37| - not ignore_assert_errors # The second condition ensures that the assertion will not be ignored even if errors are present.
```
[params:]
```
that: kube_network_plugin in ['calico', 'flannel', 'weave', 'cloud', 'cilium', 'cni', 'kube-ovn', 'kube-router', 'macvlan', 'custom_cni']
msg: calico is not supported
```
<**STEP**: 21>
kubespray/roles/kubernetes/preinstall/tasks/0040-verify-settings.yml #164
```
[ code and comment: ]
164|- name: "Check that kube_service_addresses is a network range" # This task is named to verify that the variable 'kube_service_addresses' is a valid network range.
165| assert: # The assert module is used to check if a condition is true.
166| that: # The condition(s) that must be true for the assertion to pass.
167| - kube_service_addresses | ipaddr('net') # Checks if 'kube_service_addresses' is a valid network using the ipaddr filter.
168| msg: "kube_service_addresses = '{{ kube_service_addresses }}' is not a valid network range" # The error message that will be displayed if the condition is not met.
169| run_once: yes # This task will run only once, regardless of how many hosts are targeted.
```
[params:]
```
that: ["kube_service_addresses | ipaddr('net')"]
msg: kube_service_addresses = '10.233.0.0/18' is not a valid network range
```
<**STEP**: 22>
kubespray/roles/kubernetes/preinstall/tasks/0040-verify-settings.yml #171
```
[ code and comment: ]
171|- name: "Check that kube_pods_subnet is a network range" # This task is named to verify that the 'kube_pods_subnet' variable is a valid network range.
172| assert: # The assert module is used to check if certain conditions are met.
173| that: # The conditions that must be true for the assertion to pass.
174| - kube_pods_subnet | ipaddr('net') # This condition checks if 'kube_pods_subnet' is a valid network range using the ipaddr filter.
175| msg: "kube_pods_subnet = '{{ kube_pods_subnet }}' is not a valid network range" # The message that will be displayed if the assertion fails, indicating that the 'kube_pods_subnet' is not a valid network range.
176| run_once: yes # This task will only be executed once, regardless of how many hosts it is run against.
```
[params:]
```
that: ["kube_pods_subnet | ipaddr('net')"]
msg: kube_pods_subnet = '10.233.64.0/18' is not a valid network range
```
<**STEP**: 23>
kubespray/roles/kubernetes/preinstall/tasks/0040-verify-settings.yml #227
```
[ code and comment: ]
227|- name: Stop if container manager is not docker, crio or containerd # This task is named to stop the play if the container manager is not one of the specified types.
228| assert: # The assert module is used to validate that a condition is true.
229| that: container_manager in ['docker', 'crio', 'containerd'] # The condition checks if the variable 'container_manager' is within the specified list of valid container managers.
230| msg: "The container manager, 'container_manager', must be docker, crio or containerd" # The error message to display if the condition fails, indicating the required container manager types.
231| run_once: true # This flag ensures that the task is only executed once, regardless of how many hosts are targeted.
```
[params:]
```
that: container_manager in ['docker', 'crio', 'containerd']
msg: The container manager, 'container_manager', must be docker, crio or containerd
```
<**STEP**: 24>
kubespray/roles/kubernetes/preinstall/tasks/0040-verify-settings.yml #233
```
```yaml
233|- name: Stop if etcd deployment type is not host or kubeadm when container_manager != docker # Asserts that the etcd deployment type must be either 'host' or 'kubeadm' when the container manager is not Docker.
234| assert: # The assert module is used to evaluate conditions and handle failures.
235| that: etcd_deployment_type in ['host', 'kubeadm'] # Checks if the etcd deployment type is one of the specified valid types.
236| msg: "The etcd deployment type, 'etcd_deployment_type', must be host or kubeadm when container_manager is not docker" # Error message to display if the condition fails.
237| when: # The following conditions must be met for the assertion to be evaluated.
238| - inventory_hostname in groups.get('etcd',[]) # Ensures the assertion is only evaluated for hosts in the 'etcd' group.
239| - container_manager != 'docker' # The assertion is only relevant when the container manager is not Docker.
```
```
[params:]
```
that: etcd_deployment_type in ['host', 'kubeadm']
msg: The etcd deployment type, 'etcd_deployment_type', must be host or kubeadm when container_manager is not docker
```
<**STEP**: 25>
kubespray/roles/kubernetes/preinstall/tasks/0050-create_directories.yml #70
```
[ code and comment: ]
70|- name: Create cni directories # This task is named to create the necessary directories for CNI plugins.
71| file: # The file module is used for managing files, directories, and links.
72| path: "{{ item }}" # The path is dynamically set to each item in the with_items list.
73| state: directory # Ensures that the path is a directory.
74| owner: "{{ kube_owner }}" # Sets the owner of the directory to the specified kube_owner variable.
75| mode: 0755 # Sets the permissions of the directory to 0755 (readable and writable by owner, readable by others).
76| with_items: # Loops over the list of directory paths.
77| - "/etc/cni/net.d" # The first directory to be created for CNI configuration files.
78| - "/opt/cni/bin" # The second directory for CNI binary files.
79| - "/var/lib/calico" # The third directory for Calico-specific files.
80| when: # Conditions under which this task will be executed.
81| - kube_network_plugin in ["calico", "weave", "flannel", "cilium", "kube-ovn", "kube-router", "macvlan"] # The task will only run if the kube_network_plugin is one of the listed network plugins.
82| - inventory_hostname in groups['k8s_cluster'] # The task will also only run if the inventory_hostname is part of the 'k8s_cluster' group.
83| tags: # Tags are used to categorize tasks.
84| - network # The task is tagged with 'network', indicating it's related to network configuration.
85| - cilium # The task is also tagged with 'cilium', indicating it's related to the Cilium network plugin.
86| - calico # The task is tagged with 'calico', indicating it's related to the Calico network plugin.
87| - weave # The task is tagged with 'weave', indicating it's related to the Weave network plugin.
88| - kube-ovn # The task is tagged with 'kube-ovn', indicating it's related to the kube-ovn network plugin.
89| - kube-router # The task is tagged with 'kube-router', indicating it's related to the kube-router network plugin.
90| - bootstrap-os # The task is tagged with 'bootstrap-os', possibly indicating it's part of the OS bootstrapping process.
```
[params:]
```
path: {{ item }}
state: directory
owner: {{ kube_owner }}
mode: 493
```
<**STEP**: 26>
kubespray/roles/kubernetes/preinstall/tasks/0062-networkmanager-unmanaged-devices.yml #2
```
[ code and comment: ]
2|- name: NetworkManager # Ensure NetworkManager conf.d directory is present
3| file: # The file module is used for managing files, directories, and links.
4| path: "/etc/NetworkManager/conf.d" # Specifies the path to the directory to manage.
5| state: directory # Ensures the specified path is a directory.
6| recurse: yes # Recursively applies the state to all directories and files within the specified path.
```
[params:]
```
path: /etc/NetworkManager/conf.d
state: directory
recurse: True
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: file
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642952.949568-28094-50677966811571/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 27>
kubespray/roles/kubernetes/preinstall/tasks/0063-networkmanager-dns.yml #14
```
[ code and comment: ]
14|- name: set default dns if remove_default_searchdomains is false # This task sets the default search domains if the variable remove_default_searchdomains is not set to true.
15| set_fact: # The set_fact module is used to set new variables or modify existing ones.
16| default_searchdomains: ["default.svc.{{ dns_domain }}", "svc.{{ dns_domain }}"] # Defines a list of default search domains using the dns_domain variable.
17| when: not remove_default_searchdomains|default()|bool or (remove_default_searchdomains|default()|bool and searchdomains|default([])|length==0) # The condition checks if remove_default_searchdomains is not true or if it is true and the searchdomains list is empty, then it sets the default search domains.
```
[params:]
```
default_searchdomains: ['default.svc.cluster.local', 'svc.cluster.local']
```
<**STEP**: 28>
kubespray/roles/kubernetes/preinstall/tasks/0063-networkmanager-dns.yml #19
```
[ code and comment: ]
19|- name: NetworkManager | Add DNS search to NM configuration # This task is named to add DNS search entries to the NetworkManager configuration.
20| ini_file: # The ini_file module is used for managing INI-style configuration files.
21| path: /etc/NetworkManager/conf.d/dns.conf # Specifies the path to the configuration file where the DNS search entries will be added.
22| section: global-dns # Identifies the section in the configuration file where the DNS search entries will be added.
23| option: searches # Specifies the option within the section where the DNS search entries will be set.
24| value: "{{ (default_searchdomains|default([]) + searchdomains|default([])) | join(',') }}" # Defines the value for the DNS search entries, combining default and provided search domains into a comma-separated list.
25| mode: '0600' # Sets the file permissions to be read and writable only by the owner.
26| backup: yes # Ensures a backup of the original configuration file is made before modifications.
27| notify: Preinstall | update resolvconf for networkmanager # Specifies a handler to be notified to run after the task, which will update the resolvconf for NetworkManager.
```
[params:]
```
path: /etc/NetworkManager/conf.d/dns.conf
section: global-dns
option: searches
value: default.svc.cluster.local,svc.cluster.local
mode: 0600
backup: True
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: ini_file
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717642998.8344269-30639-100383611787964/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 29>
kubespray/roles/kubernetes/preinstall/tasks/0080-system-configurations.yml #3
```
[ code and comment: ]
3|- name: Confirm selinux deployed # This task is named to confirm that SELinux is deployed.
4| stat: # The 'stat' module is used to retrieve information about the specified file or directory.
5| path: /etc/selinux/config # The path to the SELinux configuration file.
6| get_attributes: no # This option specifies that the file attributes should not be retrieved.
7| get_checksum: no # This option specifies that the file checksum should not be retrieved.
8| get_mime: no # This option specifies that the file MIME type should not be retrieved.
9| when: # The 'when' clause is used to conditionally execute the task.
10| - ansible_os_family == "RedHat" # The task will only run if the operating system family is RedHat.
11| - "'Amazon' not in ansible_distribution" # The task will only run if 'Amazon' is not part of the distribution name.
12| register: slc # The output of the 'stat' module will be stored in the 'slc' variable for use in subsequent tasks.
```
[params:]
```
path: /etc/selinux/config
get_attributes: False
get_checksum: False
get_mime: False
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: stat
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717643037.2119532-377-150187025559707/
_ansible_remote_tmp: ~/.ansible/tmp
```
<**STEP**: 30>
kubespray/roles/kubernetes/preinstall/tasks/0080-system-configurations.yml #14
```
[ code and comment: ]
14|- name: Set selinux policy # This task is named to set the SELinux policy to a specific state.
15| selinux: # The selinux module is used to manage SELinux policies and settings.
16| policy: targeted # The 'targeted' policy specifies the targeted SELinux policy type.
17| state: "{{ preinstall_selinux_state }}" # The state of SELinux is set based on the variable 'preinstall_selinux_state'.
18| when: # Conditions under which the task will be executed.
19| - ansible_os_family == "RedHat" # The task will only run if the operating system family is RedHat.
20| - "'Amazon' not in ansible_distribution" # The task will not run if the distribution is Amazon Linux.
21| - slc.stat.exists # The task will run if the file referenced by 'slc' exists.
22| changed_when: False # This flag indicates that the task will not change the state of the system.
23| tags: # Tags are used to categorize tasks for selective execution.
24| - bootstrap-os # The task is tagged with 'bootstrap-os', which can be used to run only this task or a group of tasks with this tag.
```
[params:]
```
policy: targeted
state: permissive
_ansible_check_mode: False
_ansible_no_log: False
_ansible_debug: False
_ansible_diff: False
_ansible_verbosity: 0
_ansible_version: 2.12.10
_ansible_module_name: selinux
_ansible_syslog_facility: LOG_USER
_ansible_selinux_special_fs: ['fuse', 'nfs', 'vboxsf', 'ramfs', '9p', 'vfat']
_ansible_string_conversion_action: warn
_ansible_socket: None
_ansible_shell_executable: /bin/sh
_ansible_keep_remote_files: False
_ansible_tmpdir: /root/.ansible/tmp/ansible-tmp-1717643061.7674525-1641-527885090576/
_ansible_remote_tmp: ~/.ansible/tmp
```
| a_jun_1d592a39703eed80f31 | |
1,878,863 | Resolving the "zsh: command not found: yarn" Error on macOS | As a new Mac user transitioning from a Windows environment, you will encounter some initial... | 0 | 2024-06-06T07:47:55 | https://dev.to/giwajossy/resolving-the-zsh-command-not-found-yarn-error-on-macos-1fnk | webdev, macos, programming, node | As a new Mac user transitioning from a Windows environment, you will encounter some initial challenges while setting up your development environment. One of the primary issues I faced was running the `yarn` command in the terminal. Here's a step-by-step account of resolving the `zsh: command not found: yarn` error.
😑 **Problem:** `zsh: command not found: yarn`
After cloning my project repository and navigating into the directory, I tried running yarn to install dependencies but got the error below:
```
zsh: command not found: yarn
```
😊 **Solution**
This error indicates that yarn is not installed on your system. To fix this, I used Homebrew, a package manager for macOS, to install yarn.
1) **Install Homebrew** (if not already installed):
Homebrew simplifies the installation of software on macOS. Open your terminal and run:
```
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
```
2) **Install yarn**:
With Homebrew installed, you can now install yarn by running:
```
brew install yarn
```
3) **Verify yarn installation:**
After the installation, verify that Yyrn is installed by running:
```
yarn -v
```
😑 **Problem:** `env: node: No such file or directory`
While verifying yarn installation, I encountered another error:
```
env: node: No such file or directory
```
This error indicates that yarn is installed, but it cannot find Node.js. Yarn depends on Node.js to run.
😊 **Solution:**
To resolve this, you need to install Node.js using Homebrew:
1) Install Node.js:
```
brew install node
```
2) Verify both yarn and Node.js Installation as shown below.
```
node -v
yarn -v
```
This time, the command should work without any issues, and you can proceed with installing dependencies and running your application.
Hope this helps.
| giwajossy |
1,878,925 | Step-by-Step Guide to Hiring ReactJS Developers for Your Tech Team | Introduction In today's tech-driven world, finding skilled developers is crucial for the success... | 0 | 2024-06-06T07:46:15 | https://dev.to/hirelaraveldevelopers/step-by-step-guide-to-hiring-reactjs-developers-for-your-tech-team-2k5f | webdev, beginners, programming, react | <div class="flex-shrink-0 flex flex-col relative items-end"> </div>
<div class="group/conversation-turn relative flex w-full min-w-0 flex-col agent-turn">
<div class="flex-col gap-1 md:gap-3">
<div class="flex flex-grow flex-col max-w-full AIPRM__conversation__response">
<div class="min-h-[20px] text-message flex flex-col items-start whitespace-pre-wrap break-words [.text-message+&]:mt-5 juice:w-full juice:items-end overflow-x-auto gap-2" dir="auto" data-message-author-role="assistant" data-message-id="b0ac02bb-a411-48f6-a3e1-c39a272598fd">
<div class="flex w-full flex-col gap-1 juice:empty:hidden juice:first:pt-[3px]">
<div class="result-streaming markdown prose w-full break-words dark:prose-invert dark">
<h1>Introduction</h1>
<p>In today's tech-driven world, finding skilled developers is crucial for the success of any software project. ReactJS, a popular JavaScript library for building user interfaces, has gained immense traction among developers and companies alike. In this comprehensive guide, we'll walk you through the process of hiring ReactJS developers for your tech team, covering everything from defining your requirements to conducting interviews.</p>
<h2>Define Your Requirements</h2>
<p>Before you start searching for ReactJS developers, it's essential to clearly define your project requirements and the specific skills you're looking for. Consider factors such as project scope, timeline, and technology stack. Create a detailed job description outlining the responsibilities and qualifications required for the role.</p>
<h3>SEO Meta Description:</h3>
<p>Define your project requirements and find the perfect ReactJS developer for your team. Learn how to create a compelling job description that attracts top talent.</p>
<h2>Understand the ReactJS Ecosystem</h2>
<p>Familiarize yourself with the ReactJS ecosystem, including its core concepts, tools, and best practices. Understanding the fundamentals of ReactJS will help you assess candidates' proficiency and ensure they can effectively contribute to your project.</p>
<h3>SEO Meta Description:</h3>
<p>Explore the ReactJS ecosystem and gain insights into its core concepts and best practices. Discover how this knowledge can help you evaluate potential candidates for your tech team.</p>
<h2>Utilize Online Platforms and Communities</h2>
<p>Tap into online platforms and communities dedicated to ReactJS development, such as GitHub, Stack Overflow, and Reddit. These platforms are excellent resources for finding talented developers, engaging with the community, and showcasing your job opportunities.</p>
<h3>SEO Meta Description:</h3>
<p>Discover where to find top ReactJS developers online and engage with the vibrant developer community. Learn how to leverage platforms like GitHub and Stack Overflow to attract skilled candidates to your job postings.</p>
<h2>Networking and Referrals</h2>
<p>Utilize your professional network and ask for referrals from colleagues, friends, and industry contacts. Personal recommendations can often lead to high-quality candidates who are a good fit for your team and project.</p>
<h3>SEO Meta Description:</h3>
<p>Harness the power of networking and referrals to find talented ReactJS developers for your tech team. Learn how personal recommendations can streamline your hiring process and connect you with qualified candidates.</p>
<h2>Review Portfolios and Projects</h2>
<p>When evaluating potential candidates, review their portfolios and previous projects to assess the quality of their work and their level of experience with ReactJS. Look for projects that demonstrate relevant skills and showcase creativity and problem-solving abilities.</p>
<h3>SEO Meta Description:</h3>
<p>Discover how to assess ReactJS developers' skills and experience by reviewing their portfolios and previous projects. Learn what to look for when evaluating candidates' work samples and project contributions.</p>
<h2>Conduct Technical Assessments</h2>
<p>Implement technical assessments or coding challenges to evaluate candidates' coding skills, problem-solving abilities, and understanding of ReactJS concepts. Tailor the assessments to reflect real-world scenarios relevant to your project requirements.</p>
<h3>SEO Meta Description:</h3>
<p>Learn how to conduct effective technical assessments to evaluate ReactJS developers' coding skills and problem-solving abilities. Discover practical tips for designing coding challenges that accurately assess candidates' proficiency.</p>
<h2>Evaluate Soft Skills</h2>
<p>In addition to technical skills, assess candidates' soft skills, such as communication, teamwork, and adaptability. Effective collaboration and communication are essential for success in a tech team environment.</p>
<h3>SEO Meta Description:</h3>
<p>Explore the importance of soft skills in hiring ReactJS developers for your tech team. Learn how to evaluate candidates' communication, teamwork, and adaptability to ensure a cohesive and productive work environment.</p>
<h2>Interview Process</h2>
<p>Design a structured interview process that allows you to assess candidates thoroughly and make informed hiring decisions. Include a mix of technical and behavioral interview questions to evaluate both skills and fit for your team culture.</p>
<h3>SEO Meta Description:</h3>
<p>Create a comprehensive interview process for hiring ReactJS developers that evaluates both technical skills and cultural fit. Discover effective interview techniques and sample questions to assess candidates' qualifications and compatibility.</p>
<h2>Offer Competitive Compensation</h2>
<p>Attract top talent by offering competitive compensation packages that reflect candidates' skills, experience, and market demand. Consider factors such as salary, benefits, and opportunities for professional growth and development.</p>
<h3>SEO Meta Description:</h3>
<p>Learn how to attract skilled ReactJS developers with competitive compensation packages and enticing perks. Explore strategies for offering competitive salaries, benefits, and career advancement opportunities to top candidates.</p>
<h2>Onboarding and Integration</h2>
<p>Once you've hired ReactJS developers for your tech team, focus on their onboarding and integration into the company culture. Provide comprehensive training and support to help new hires become productive members of your team quickly.</p>
<h3>SEO Meta Description:</h3>
<p>Discover how to onboard new ReactJS developers effectively and integrate them into your tech team. Learn best practices for providing training, support, and resources to help new hires succeed in their roles.</p>
<h2>Conclusion</h2>
<p><a title="Hiring ReactJS developers " href="https://www.aistechnolabs.com/hire-reactjs-developers/">Hiring ReactJS developers </a>for your tech team can be a challenging but rewarding process. By following this step-by-step guide and leveraging the resources and strategies outlined, you can find and onboard top talent to drive the success of your software projects.</p>
</div>
</div>
</div>
</div>
</div>
</div> | hirelaraveldevelopers |
1,878,924 | LLM can’t replace lawyers, Microsoft beats Apple Sillicon, Google Cloud lets Kinesis in | mknews #6 | 0 | 2024-06-06T07:45:50 | https://dev.to/mkdev/llm-cant-replace-lawyers-microsoft-beats-apple-sillicon-google-cloud-lets-kinesis-in-33a6 | ai, cloud, devops, news | ---
title: LLM can’t replace lawyers, Microsoft beats Apple Sillicon, Google Cloud lets Kinesis in
published: true
description: mknews #6
tags: ai, cloud, devops, news
# cover_image: https://direct_url_to_image.jpg
# Use a ratio of 100:42 for best results.
# published_at: 2024-06-06 07:44 +0000
---
LLMs fail to replace lawyers, Microsoft Surface beats Apple Sillicon, Google Cloud lets Kinesis in and improves traffic management and more in the new mknews episode!
{% embed https://www.youtube.com/watch?v=TFbEE5PIDHY %}.
| mkdev_me |
1,878,923 | 松下哲也: 知恵と経験を兼ね備えた投資の達人 | 松下 哲也 MATSUSHITA TETSUYA 国籍：日本 生年月日：1985年6月12日 性別: 男性 星座:... | 0 | 2024-06-06T07:44:21 | https://dev.to/matetsuya/song-xia-zhe-ye-zhi-hui-tojing-yan-wojian-nebei-etatou-zi-noda-ren-5035 | 松下 哲也 MATSUSHITA TETSUYA
国籍：日本
生年月日：1985年6月12日
性別: 男性
星座: 双子座
身長：180cm
体重：75kg
血液型：A型
性格：社交的、明るい、まじめ
出身地：東京
居住地：東京
現住所：東京都中央区銀座
住宅購入年と価格：2015年購入、価格600万円
車購入年と価格：2018年購入、価格100万円
利用交通機関：地下鉄銀座線
近隣のスーパーマーケット: マックスバリュー
近隣の学校：東京大学
近隣の映画館：TOHOシネマズ
近隣のレストラン: 寿司屋、ラーメン屋、イタリアンレストラン
近隣のショッピングモール：銀座中央通り
近隣にある食べ物屋: 寿司、バーベキュー、ラーメン、刺身
趣味: ショッピング、観光、美術館巡り
観光スポット：東京タワー、浅草寺
学歴: 大学で金融の修士号を取得
小学校：東京都中央区の小学校
中学校：東京都中央区の中学校
高校：東京都中央区立高等学校
卒業大学：東京大学
専攻：経済学
婚姻状況: 既婚
職業: 投資家
職場：東京の投資会社
家から職場まで歩いてどれくらいかかりますか: 15分
家から職場まで車でどれくらいかかりますか: 10分
就寝時間と起床時間：毎晩11時に就寝、毎朝6時に起床
営業時間：9:00～17:00
日々の主な業務内容：株式取引、投資分析
勤務中のスケジュール:
午前：運動、経済ニュースを読む
正午：昼食と休憩
午後：投資分析、トレーディング
夜：帰家、本を読んで休む
趣味：音楽、読書、旅行
音楽：ポップミュージック
書籍: 経済学、投資、財務管理
好きな芸能人：三浦春馬
好きな服装：フォーマル、カジュアル
父親：松下健一
性格：堅実家、努力家
生年月日：1960年3月5日
職業：実業家
趣味：ゴルフ、読書
母親：松下光子
生年月日：1963年8月20日
職業：主婦
趣味：料理、ガーデニング
個人的な観点
経済社会は不透明で閉塞感が強いといわれ続けていますが、多くの人々がそれぞれの立場で未来を明るいものにしようとしている努力は報われると信じています。これまで、制度・法制、経済政策、規制、金融資本市場、景気・経済、財政・税制、人口動態などさまざまな分野の調査・分析を、民間シンクタンクの研究員として行ってきました。世の中にある無数のサブシステムは、複雑に、また、意外なところで結びついています。前途を切り開くために挑戦を続ける方々のお役にたてるよう、分かりやすい情報や幅広い視点からの思考の発信を続けていきます。
座右の銘
少額でいいですから、投資をしてください。本を読むだけではダメです。
はじめに紹介するバフェットの格言は、これから株式投資を本格的に始めようと考えている人向けのものです。バフェットが11歳から株式投資を始めたエピソードは有名。この経験の積み上げのなかから、独自の成功法則を築き上げました。もし、彼が本を読むばかりで投資のプレイヤーにならなければ、今の成功はなかったでしょう。実践なきところに成功はない。このことをバフェット流の言い方で表現した格言といえます。
| matetsuya | |
1,878,921 | Innovations Unveiled: The Latest in Adhesive Tape Solutions | Headline: Past Limits: Exactly how Concealing Tape Producers are actually Broadening Their Get to As... | 0 | 2024-06-06T07:44:05 | https://dev.to/ronald_woodgo_ba03f686524/innovations-unveiled-the-latest-in-adhesive-tape-solutions-1igo | design | Headline: Past Limits: Exactly how Concealing Tape Producers are actually Broadening Their Get to
As a kid, you might have actually utilized concealing tape towards catch illustrations into your wall surface or even towards embellish your institution jobs
However performed you understand that concealing tape has actually lots of various other useful requests past fine craft jobs? Concealing tape producers have actually been actually innovating their items towards broaden their get to towards various market
, we'll check out the benefits as well as advantages of utilization concealing tape, its own security, ways to utilize it, as well as the high top premium of its own request
Benefits of Concealing Tape
Concealing tape is actually a flexible sticky tape that could be utilized for a selection of functions
It is actually created coming from a slim as well as easy-to-tear report that's covered along with a pressure-sensitive sticky on one edge
Among the primary benefits of utilization concealing tape is actually its own simplicity of utilization
It is actually simple towards use as well as eliminate without leaving behind any duct tape black color of deposit or even harming surface areas
Concealing tape is actually likewise affordable, creating it a prominent option for each specialist as well as DIY jobs
Development in Concealing Tape
Concealing tape producers are actually continuously innovating their items towards stay up to date with the needs of various markets
For example, they have actually designed specific concealing strips for the automobile market that can easily endure heats as well as offer an accuracy surface
Concealing tape for paint has actually likewise developed towards consist of UV-resistant as well as water resistant choices
Various other ingenious concealing strips consist of double-sided as well as foam-backed strips that can easily bond various products with each other
Security of Concealing Tape
When utilizing concealing tape, it is actually necessary to guarantee that it adheres to security requirements
Concealing strips ought to be actually made from safe products that are actually risk-free for utilize about kids, animals, as well as meals items
Very most concealing strips are actually risk-free towards utilize along with a selection of surface areas, consisting of wall surfaces, floorings, as well as furnishings
Nevertheless, some concealing strips might certainly not appropriate for utilize on delicate masking paint tape products like wallpaper or even fragile materials
Ways to Utilize Concealing Tape
Concealing tape is actually an user friendly sticky tape that could be utilized for a selection of functions
Towards utilize concealing tape, comply with these actions:
1. Cleanse the surface area: Guarantee that the surface area to become taped is actually cleanse as well as completely dry out
This will certainly guarantee that the tape sticks correctly
2. Reduce the tape: Reduce an item of concealing tape towards the preferred size
The tape ought to be actually somewhat much a lot longer compared to the surface area to become taped.
3. Use the tape: Catch the concealing tape into the surface area as well as push it securely towards guarantee it sticks
4. Eliminate the tape: Towards eliminate the tape, draw it away carefully coming from the surface area at a 45-degree angle
High top premium of Concealing Tape Request
When utilizing concealing tape, it is actually necessary to guarantee that it is actually been applicable properly for a top quality surface
Concealing tape ought to be actually been applicable uniformly as well as securely towards the surface area to avoid any type of hemorrhaging of coat or even various other products
When eliminating the tape, guarantee that it is actually performed thoroughly as well as gradually towards prevent any type of damages towards the surface area
The high top premium of concealing gummed tape request can easily guarantee an expert, cleanse surface for any type of job | ronald_woodgo_ba03f686524 |
1,878,920 | Exploring the future of communication | VoIP protocol works its magic, revolutionizing our connections. Now, in this digital age we're... | 0 | 2024-06-06T07:43:10 | https://dev.to/growwwise/exploring-the-future-of-communication-2698 | VoIP protocol works its magic, revolutionizing our connections. Now, in this digital age we're navigating together, SIP gateways and recording via SIP are absolutely crucial for internet calls. Ready to get to grips with these vital bits that don't just send our chats but keep them crystal clear?
Have you noticed how the internet has turned our way of chatting upside down, especially when it comes to voice chats? This shift owes a lot to Voice over Internet Protocol (VoIP), which is radically reshaping old-school phone conversations. At its heart, [voip protocol](https://www.vaxvoip.com/voipblog/voip/2401 ) operates on joining forces so we can gab away online.
But here's something intriguing: ever thought about how those natters get recorded for playback? That's where Session Initiation Protocol (SIP) recording steps in — it’s like having a tape recorder for online chinwags that zip through SIP networks. As one of VoIP's crucial elements, SIP takes charge by kicking off, keeping up and ending calls or even video meets!
## Exploring the essentials of VoIP protocol and SIP recording
For any business worth its salt, tucking into these recordings is super handy; talk about eavesdropping on customer service banter or making sure chat quality stays top-notch.
Let's unwrap the mysteries of SIP recording – it's more than just catching what’s said; we're talking about snagging all those juicy call details too.
Picture this: you've got info on how long each chinwag lasted, who was nattering and when they fancied a chat—it's like your own personal logbook that never forgets. Are you setting up [sip recording](https://www.vaxvoip.com/recordingsdk)? Here’s the scoop - where to stash these gems is key. You could tuck 'em away right on your gadgets or float them up to cloud storage heavens.
We are talking about the process of capturing and storing communication sessions that include voice calls, video calls and other multimedia sessions. SIP recording is crucial for various purposes :
1. Compliance
2. Quality assurance
3. Training
4. Dispute resolutions
### Integrating SIP gateways into modern communication systems
As we dive into the digital age, it's essential to get our communication tech up to speed. Think [sip gateway](https://www.vaxvoip.com/sip-gateway) – they're pivotal for this whole thing. Picture these nifty gadgets as a sort of translator, smoothly linking old-school phone lines with snazzy VoIP systems.So why should you care?
Let’s say there’s a company clinging onto its vintage phone setup but itching for the perks and penny-pinching of VoIP. Enter: SIP gateway - your knight in shining armour! This handy device flips analog chatter from yesteryear's wires into crisp digital packets that zip across cyberspace.
Now imagine keeping your tried-and-tested digits while basking in all the goodies VoIP throws at you; that’s what hopping onto a SIP gateway bandwagon offers businesses eager not to upset their communications applecart yet crave innovation benefits.
#### The advantages of SIP recording in business telephony
SIP recording isn't just some fancy tech trick; it's a game changer for business phone systems, offering heaps of perks that could totally transform the way you handle calls. Got a customer on the line and need to sort out who said what? No sweat – play back their call to iron out any wrinkles, get the lowdown on complaints or double-check your team is hitting those high standards we all aim for.
SIP recording steps in as a true lifesaver, it provides companies with concrete evidence of their interactions, crucial when it comes to showing you've met industry standards or legal demands. Can you imagine how reassuring it must be to have those recordings handy during an audit? Take industries like:
• Finance
• Healthcare
• Insurance company
#### Understanding the role of VoIP
To wrap things up, the advancements in VOIP technology have massively influenced how we chat around the world – it's all about swifter and more expandable talks now. Who'd have thought that SIP recording would become such a game-changer?
It's crucial for keeping tabs on call quality and making sure everyone's playing by the rules, snagging priceless info from each conversation. And let me tell you about the SIP gateway! These clever bits of tech take a mishmash of protocols from various gadgets and networks and translate them into one universal lingo.
This clever bit of kit blends different networks so smoothly, voice chats are easier to jump onto than ever before. Together, these systems are really shaking things up; they represent an era brimming with innovative ways to connect that completely transform our day-to-day banter as well as business dealings.
| growwwise | |
1,878,919 | EmployeeRemote | The Remote Work Revolution: At EmployeeRemote, we understand that the future of work lies beyond the... | 0 | 2024-06-06T07:39:18 | https://dev.to/employeeremote/employeeremote-1lae | work, job, remote | **The Remote Work Revolution:** At EmployeeRemote, we understand that the future of work lies beyond the confines of traditional office spaces. Our platform is designed to connect professionals with the most sought-after remote jobs of 2024, offering not just a job, but a lifestyle transformation. With opportunities spanning various industries, we ensure that every professional finds their perfect match, promising flexibility, growth, and the comfort of working from anywhere.
Visit [our website](https://employeeremote.com/) for more info
Member of [marsx.dev](https://marsx.dev/) family
Got a question or wanna say hi?
I’m on Twitter: [@johnrushx](https://twitter.com/johnrushx/) | employeeremote |
1,878,918 | How to Build a Command-Line Barcode Reader with Rust and C++ Barcode SDK | Rust's popularity is increasing rapidly. This article aims to integrate Rust with the Dynamsoft C++... | 0 | 2024-06-06T07:38:03 | https://www.dynamsoft.com/codepool/rust-barcode-reader-command-line.html | rust, cpp, windows, linux | **Rust**'s popularity is increasing rapidly. This article aims to integrate **Rust** with the **Dynamsoft C++ Barcode Reader SDK**. We will walk through the process of building a command-line barcode reader for **Windows** and **Linux**.
## Prerequisites
- [Rust](https://www.rust-lang.org/tools/install): A systems programming language renowned for speed, safety, and concurrency.
- **bindgen**: A Rust tool that generates Rust FFI bindings to C and C++ libraries. You can install it with the following command:
```bash
cargo install bindgen-cli
```
- [Dynamsoft Barcode Reader Trial License](https://www.dynamsoft.com/customer/license/trialLicense/?product=dbr): You will receive a 30-day free trial license by email.
- [Dynamsoft C++ Barcode SDK v9.x](https://www.dynamsoft.com/barcode-reader/downloads/1000003-confirmation-v9.x/): A ZIP package that contains the shared library and header files for Windows and Linux.
## Step 1: Setting Up the Rust Project
1. Use `Cargo` to initialize the project:
```bash
cargo new barcode_reader
cd barcode_reader
```
2. Modify `Cargo.toml` to include the required dependencies:
```toml
[package]
name = "hello_world"
version = "0.1.0"
edition = "2018"
[build-dependencies]
cc = "1.0"
walkdir = "2.5.0"
```
The `cc` crate is used to compile the C++ code. The `walkdir` crate is used to traverse the directory to find the shared library.
## Step 2: Configuring the C++ Barcode SDK
1. Extract the downloaded Dynamsoft C++ Barcode SDK, and copy the headers and platform-specific libraries to the Rust project directory structure as follows:
```bash
|- include
|- DynamsoftBarcodeReader.h
|- DynamsoftCommon.h
|- platforms
|- linux
|- libDynamicPdf.so
|- libDynamsoftLicenseClient.so
|- libDynamsoftBarcodeReader.so
|- win
|- bin
|- DynamicPdfx64.dll
|- DynamsoftBarcodeReaderx64.dll
|- DynamsoftLicenseClientx64.dll
|- vcomp110.dll
|- lib
|- DBRx64.lib
```
2. Create a `lib` directory within your project. In the `lib` folder, create two files: `bridge.cpp` and `bridge.h`. These files will handle communication between Rust and the C++ SDK.
3. Edit `build.rs` to build the C++ code and link the shared libraries.
1. Determine the target operating system (**Windows**/**Linux**). When running `cargo build`, the `println!()` function won't output anything to the console unless you add `cargo:warning` to the message.
```rust
use std::env;
use cc::Build;
use std::fs;
use walkdir::WalkDir;
use std::path::{Path, PathBuf};
fn main() {
// Determine the target operating system
let target_os = env::var("CARGO_CFG_TARGET_OS").unwrap();
println!("cargo:warning=OS: {}..............................................", target_os);
}
```
2. Link the shared libraries based on the target operating system, and copy the shared libraries to the output path.
```rust
fn get_out_dir() -> PathBuf {
let out_dir = env::var("OUT_DIR").unwrap();
let debug_offset = out_dir.find("debug").unwrap_or(0);
let release_offset = out_dir.find("release").unwrap_or(0);
let mut path = String::from("");
if debug_offset > 0 {
println!(">>> where is debug {}", debug_offset);
path.push_str(&format!("{}", &out_dir[..debug_offset]));
path.push_str("debug");
println!("{}", path);
}
if release_offset > 0 {
println!(">>> where is release {}", release_offset);
path.push_str(&format!("{}", &out_dir[..release_offset]));
path.push_str("release");
println!("{}", path);
}
PathBuf::from(path)
}
fn copy_shared_libs_from_dir_to_out_dir(src_dir: &Path, out_dir: &Path, extension: &str) {
for entry in WalkDir::new(src_dir).into_iter().filter_map(|e| e.ok()) {
if entry.path().extension().and_then(|ext| ext.to_str()) == Some(extension) {
let lib_path = entry.path();
let file_name = lib_path.file_name().unwrap();
let dest_path = out_dir.join(file_name);
fs::copy(lib_path, dest_path.clone()).expect("Failed to copy shared library");
println!("Copied {} to {}", lib_path.display(), dest_path.display());
}
}
}
match target_os.as_str() {
"windows" => {
// Link Dynamsoft Barcode Reader for Windows
println!("cargo:rustc-link-search=../../../platforms/win/lib");
println!("cargo:rustc-link-lib=static=DBRx64");
// Copy *.dll files to the output path for Windows
let src_dir = Path::new("../../../platforms/win/bin");
copy_shared_libs_from_dir_to_out_dir(src_dir, &get_out_dir(), "dll");
},
"linux" => {
// Link Dynamsoft Barcode Reader for Linux
println!("cargo:rustc-link-search=../../../platforms/linux");
println!("cargo:rustc-link-lib=dylib=DynamsoftBarcodeReader");
// Set rpath for Linux
println!("cargo:rustc-link-arg=-Wl,-rpath,../../../platforms/linux");
// Copy *.so files to the output path for Linux
let src_dir = Path::new("../../../platforms/linux/bin");
copy_shared_libs_from_dir_to_out_dir(src_dir, &get_out_dir(), "so");
},
}
```
3. Compile the C++ code that exposes some C functions to Rust.
```rust
Build::new()
.cpp(true)
.include("../../../include")
.file("lib/bridge.cpp")
.compile("bridge");
println!("cargo:rustc-link-lib=static=bridge");
println!("cargo:rustc-link-search=native={}", env::var("OUT_DIR").unwrap());
```
## Step3: Implementing the C/C++ Bridging Code
In this step, we will create the bridging code to enable Rust to interact with the C++ SDK. We will declare and implement the necessary structures and functions in C/C++.
### Declaring Structures and Functions in bridge.h
In the directory, create a file named `bridge.h` and declare the C structures and functions that will be called by Rust.
```cpp
#ifndef BRIDGE_H
#define BRIDGE_H
#include "DynamsoftBarcodeReader.h"
#ifdef __cplusplus
extern "C"
{
#endif
typedef struct
{
const char *barcode_type;
const char *barcode_value;
int x1;
int y1;
int x2;
int y2;
int x3;
int y3;
int x4;
int y4;
} Barcode;
typedef struct
{
Barcode *barcodes;
int count;
} BarcodeResults;
Barcode *create_barcode(const char *type, const char *value, int x1, int y1, int x2, int y2, int x3, int y3, int x4, int y4);
BarcodeResults *decode_barcode_file(void *instance, const char *filename);
void free_barcode(BarcodeResults *results);
int init_license(const char *license);
#ifdef __cplusplus
}
#endif
#endif // BRIDGE_H
```
- The `Barcode` structure represents the barcode information.
- The `BarcodeResults` structure contains an array of `Barcode` structures.
- The `create_barcode` function creates a `Barcode` structure.
- The `decode_barcode_file` function decodes barcodes from an image file.
- The `free_barcode` function releases the memory allocated for the `BarcodeResults` structure.
- The `init_license` function initializes the license.
### Implementing the Functions in bridge.cpp
In the `bridge.cpp` file, implement the functions declared in `bridge.h`.
```cpp
#include "bridge.h"
#include <cstring>
#include <cstdlib>
Barcode *create_barcode(const char *type, const char *value, int x1, int y1, int x2, int y2, int x3, int y3, int x4, int y4)
{
Barcode *barcode = (Barcode *)std::malloc(sizeof(Barcode));
barcode->barcode_type = strdup(type);
barcode->barcode_value = strdup(value);
barcode->x1 = x1;
barcode->y1 = y1;
barcode->x2 = x2;
barcode->y2 = y2;
barcode->x3 = x3;
barcode->y3 = y3;
barcode->x4 = x4;
barcode->y4 = y4;
return barcode;
}
void free_barcode(BarcodeResults *results)
{
for (int i = 0; i < results->count; i++)
{
std::free((void *)results->barcodes[i].barcode_type);
std::free((void *)results->barcodes[i].barcode_value);
}
std::free(results->barcodes);
std::free(results);
}
int init_license(const char *license)
{
char errorMsgBuffer[512];
// Click https://www.dynamsoft.com/customer/license/trialLicense/?product=dbr to get a trial license.
int ret = DBR_InitLicense(license, errorMsgBuffer, 512);
return ret;
}
BarcodeResults *decode_barcode_file(void *instance, const char *filename)
{
char errorMsgBuffer[512];
TextResultArray *pResults = NULL;
BarcodeResults *all_barcodes = NULL;
int ret = DBR_DecodeFile(instance, filename, "");
DBR_GetAllTextResults(instance, &pResults);
if (pResults->resultsCount > 0)
{
all_barcodes = (BarcodeResults *)std::malloc(sizeof(BarcodeResults));
all_barcodes->count = pResults->resultsCount;
all_barcodes->barcodes = (Barcode *)std::malloc(sizeof(Barcode) * pResults->resultsCount);
for (int iIndex = 0; iIndex < pResults->resultsCount; iIndex++)
{
LocalizationResult *localizationResult = pResults->results[iIndex]->localizationResult;
Barcode *barcode = create_barcode(pResults->results[iIndex]->barcodeFormatString, pResults->results[iIndex]->barcodeText,
localizationResult->x1, localizationResult->y1, localizationResult->x2, localizationResult->y2,
localizationResult->x3, localizationResult->y3, localizationResult->x4, localizationResult->y4);
all_barcodes->barcodes[iIndex] = *barcode;
}
}
DBR_FreeTextResults(&pResults);
return all_barcodes;
}
```
## Step4: Generating Rust Bindings for C/C++ Code
To invoke the C/C++ functions from Rust, we need to generate Rust bindings for the C/C++ code. We can either write the bindings manually or use the `bindgen` tool to generate them automatically as follows:
```bash
bindgen ./lib/bridge.h -o bindings.rs
```
In addition to the methods implemented in `bridge.cpp`, we add two more functions contained in the C++ SDK: `DBR_CreateInstance` and `DBR_DestroyInstance`. The full `bindings.rs` file is as follows:
```rust
use std::ffi::c_void;
use std::os::raw::c_char;
use std::os::raw::c_int;
#[repr(C)]
pub struct Barcode {
pub barcode_type: *const c_char,
pub barcode_value: *const c_char,
pub x1: c_int,
pub y1: c_int,
pub x2: c_int,
pub y2: c_int,
pub x3: c_int,
pub y3: c_int,
pub x4: c_int,
pub y4: c_int,
}
#[repr(C)]
pub struct BarcodeResults {
pub barcodes: *mut Barcode,
pub count: c_int,
}
extern "C" {
// Bridge functions
pub fn free_barcode(barcode: *mut BarcodeResults);
pub fn init_license(license: *const c_char) -> c_int;
pub fn decode_barcode_file(instance: *mut c_void, filename: *const c_char) -> *mut BarcodeResults;
// Dynamsoft C++ Barcode Reader SDK functions
pub fn DBR_CreateInstance() -> *mut c_void;
pub fn DBR_DestroyInstance(barcodeReader: *mut c_void);
}
```
## Step5: Writing Rust Code
The final step is to write Rust code in the `main.rs` file to implement the command-line barcode reader.
1. Import the generated bindings and other necessary libraries.
```rust
mod bindings;
use std::io::{self, Write};
use std::ffi::CString;
use bindings::*;
```
2. Activate the license of Dynamsoft Barcode Reader:
```rust
let license = "LICENSE-KEY";
let ret = unsafe {
let license = CString::new(license).expect("CString::new failed");
init_license(license.as_ptr())
};
println!("InitLicense: {}", ret);
```
3. Create an instance of Dynamsoft Barcode Reader:
```rust
let reader_ptr = unsafe { DBR_CreateInstance() };
if reader_ptr.is_null() {
panic!("Failed to create barcode reader instance");
}
```
4. Prompt the user to enter a file name in a loop. If the user types `exit`, the program will exit.
```rust
loop {
print!("Please enter the file name (or type 'exit' to quit): ");
io::stdout().flush().unwrap();
let mut file_name = String::new();
io::stdin().read_line(&mut file_name).expect("Failed to read line");
let file_name = file_name.trim();
if file_name.to_lowercase() == "exit" {
break;
}
println!("Processing file: {}", file_name);
let path = CString::new(file_name).expect("CString::new failed");
}
```
5. Decode barcodes from the image file and print the results.
```rust
unsafe {
let results_ptr = decode_barcode_file(reader_ptr, path.as_ptr());
if results_ptr.is_null() {
println!("No barcodes found.");
} else {
let results = &*results_ptr;
let barcodes = std::slice::from_raw_parts(results.barcodes, results.count as usize);
for (i, barcode) in barcodes.iter().enumerate() {
let barcode_type = std::ffi::CStr::from_ptr(barcode.barcode_type).to_string_lossy();
let barcode_value = std::ffi::CStr::from_ptr(barcode.barcode_value).to_string_lossy();
println!("Barcode {}: type = {}, value = {}", i + 1, barcode_type, barcode_value);
println!(
"Coordinates: ({}, {}), ({}, {}), ({}, {}), ({}, {})",
barcode.x1, barcode.y1, barcode.x2, barcode.y2,
barcode.x3, barcode.y3, barcode.x4, barcode.y4
);
}
free_barcode(results_ptr);
}
}
```
6. Run the program.
```bash
cargo clean
cargo run
```
## Source Code
[https://github.com/yushulx/cmake-cpp-barcode-qrcode/tree/main/examples/9.x/rust](https://github.com/yushulx/cmake-cpp-barcode-qrcode/tree/main/examples/9.x/rust)
| yushulx |
1,878,917 | My first launch on Product Hunt | Hello Dev.to After losing my job as a frontend developer on 1st of April I decided it is a perfect... | 0 | 2024-06-06T07:37:16 | https://dev.to/alenvarazdinac/my-first-launch-on-product-hunt-2chd | webdev, career, frontend, saas | Hello Dev.to
After losing my job as a frontend developer on 1st of April I decided it is a perfect moment to start creating something on my own. Firstly I decided to offer coaching to other developers and after that web development services to businesses. Neither of those didnt go well, because I didn't really wanted to spend my time getting leads and then going on calls with those leads. What I wanted to do is to create applications that will be used by other people. But I was always intimitated to release on Product Hunt and to share my application everywhere because I am aware that a lot of other applications created are much better than mine. Until I stumbled upon videos of a SaaS maker Marc Lou, which motivated me to launch an application on Product Hunt no matter what. That was the perfect timing with my current unemployeed situation. And I got the app idea from Marc Lou, he is the one who shared the idea publicly on his Twitter/X account.
So here we go, I am more than happy to announce that my application Bento Highlights is currently launched on Product Hunt and it is waiting for your votes and feedback. (6.6.2024.)
[Product Hunt Launch](https://www.producthunt.com/posts/bento-highlights)
Bento Highlights lets you showcase your milestones with style. Create beautiful visuals that reflect your brand's progress and engage your audience. Perfect for startups, businesses, and influencers aiming to fascinate their followers.
Application has a free plan so feel free to test it out.
[Bento Highlights](https://www.bentohighlights.com/)
If you are willing to spare some of your time to go and vote for my Product Hunt launch, thank you a lot, it means a world to me in my current situation.
If not, no harm, thank you for reading this.
Thank you,
Alen
| alenvarazdinac |
1,878,916 | List of Best Linux RDP Client: 2024 Guide | When it comes to remote desktop connectivity, choosing the best RDP client for Linux has become a... | 0 | 2024-06-06T07:34:02 | https://dev.to/leasepacket/list-of-best-linux-rdp-client-2024-guide-2pde | linux, rdp, linuxserver, leasepacket | When it comes to remote desktop connectivity, choosing the best RDP client for Linux has become a crucial task for many users. As businesses and individuals are increasingly looking for endless solutions to access Windows-based systems from their Linux environments. To find the most reliable and efficient Linux RDP client to Windows becomes paramount. In this article, we will explore the features, advantages and disadvantages of various RDP clients available in 2024 for Linux helping you to make an informed decision.
## Best RDP Softwares: 2024
Here we are giving a list of some of the best Linux [RDP (Remote Desktop Protocol)](https://leasepacket.com/buy-rdp/) clients for 2024, with various needs such as performance, security, and usability.
### 1. Remmina – Remote Desktop Client for Linux
Remmina is an open-source RDP client for linux. It provides users versatility and some rich features for accessing and managing remote desktops and remote applications on various platforms. Below, we'll explain its key features, advantages, and disadvantages.
**Key Features of Remmina**
- Remmina supports a wide array of remote desktop protocols, such SSH, NX, SPICE, and more.
- Remmina allows users to manage multiple RDP connections simultaneously.
- Remmina offers a user-friendly interface.
- Remmina provides customizable profile features to create and save connection profiles, allowing for quick access to frequently used remote systems.
- Remmina supports file transfer between the local and remote systems for sharing files during remote sessions.
- It supports audio redirection which allows users to hear sound from the remote system on their local machine.
- Remmina offers remote printing service, so that users can print documents from the remote system on your local printer.
- Users can establish secure connections using SSH tunneling with Remmina, improving the security of your remote desktop sessions.
- Remmina is well integrated with various Linux desktop environments, including GNOME and KDE.
**Disadvantages of Remmina:**
- Limited OS Support
- Lack of Advanced Features
### 2. TigerVNC (Virtual Network Computing)
TigerVNC is also an open-source RDP client software for linux windows that allows users to access and control the graphical desktop of a remote server over a connection. It is based on the VNC (Virtual Network Computing) protocol which provides a secure and efficient way to share and control desktop environments across different platforms, including Linux.
**Key Features of TigerVNC**
- TigerVNC allows users to connect and control remote Linux desktops from other devices.
- It provides cross-platform compatibility for Linux, Windows, and macOS, enabling compatibility across different operating systems.
- TigerVNC supports secure encryption techniques to protect data.
- It is performance optimized and provides a smooth remote desktop experience.
- Clipboard Integration allows sharing clipboard contents between the local and remote desktops and simplifies data transfer.
- TigerVNC offers multiple authentication methods that are supported to enhance security.
Disadvantages of TigerVNC
- Configuration complexity for users who are not familiar with Linux and networking.
- Limited Network Bandwidth Usage
- Lack of Built-In Features
### 3. Anydesk- Remote Desktop Application for Linux
AnyDesk is a popular remote desktop program used virtually everywhere. Employees may help their clients from their workplace by using AnyDesk to connect to the client's PC and resolve issues.
**Key Features of AnyDesk:**
- AnyDesk allows users to connect to remote computers and control them virtually.
- It offers Cross-Platform compatibility with various OSs including Linux, Windows, macOS, Android, and iOS.
- AnyDesk is known for high-performance remote desktop capabilities.
- It uses encryption to secure connections and prevent unauthorized access.
- Users can transfer files easily between the local and remote devices.
- AnyDesk supports unattended access for remote support scenarios.
- It supports multi-monitor setups handling, making it suitable for professionals who use multiple screens.
**Disadvantages of AnyDesk:**
- Limited Free Plan for Businesses and professional users
- Limited Features on Linux
### 4. VNC Connect – Remote Desktop Access Solution
VNC Connect is a RDP client access solution for linux developed by RealVNC. It allows users to connect to and control remote systems or servers from various platforms, like Windows, macOS, Linux, and smartphones. VNC stands for Virtual Network Computing, and VNC Connect is one of the implementations of the VNC protocol.
**Key Features of VNC Connect:**
- VNC Connect allows users to access and control remote computers or servers.
- Cross-Platform Compatibility with Windows, macOS, Linux, and mobile devices.
- VNC Connect ensures secure communication between local and remote systems.
- It supports easy file transfer between the local and remote machines.
- Customization feature offers options to customize display settings for optimal performance.
- Grouping and Deployment feature provides tools for organizing and managing multiple remote systems.
**Disadvantages of VNC Connect:**
- Performance Issue
- Lack of advanced authentication methods
- Advanced features are available only in the paid version.
### 5. Vinagre – Remote Desktop Viewer for Linux
Vinagre is a RDP client for linux. It provides GUI (Graphical User Interface) for remote connection using various remote desktop protocols, including VNC (Virtual Network Computing) and RDP (Remote Desktop Protocol). Vinagre is often included in the GNOME desktop environment, which is the default desktop environment for several Linux distributions.
**Key Features of Vinagre:**
- Vinagre supports both VNC and RDP protocols which makes it versatile for connecting to various types of remote systems.
- GNOME Integration provides a consistent user experience.
- Vinagre allows users to manage connection profiles for easy access to remote systems.
- Clipboard sharing and integration allows users to copy and paste text and files between the local and remote desktops.
- It supports various authentication methodologies to ensure secure remote access.
- Vinagre provides a straightforward interface that makes it accessible to users of all levels of experience.
Disadvantages of Vinagre:
- Limited Advanced Features
- Performance issue for graphics-intensive applications
## How to Choose the Best RDP for LInux?
Choosing the best RDP client for linux depends on your specific needs and preferences. Linux offers several remote desktop client options, each with its own features and advantages. Here are some factors to consider when selecting the right Linux RDP for you:
- Cross Platform Compatibility
- Remote Desktop Protocol (RDP) Support
- Multiple Protocol Options
- Easy User Interface
- Optimized Performance
- Enhanced Security
- Clipboard and File Transfer Features
- Multi-Monitor Supportable
- Community and Support
- Cost Effectiveness
## Conclusion
In 2024, remote desktop client software that caters to different needs and preferences. Whether you prioritize performance, security, or a combination of both, the best Linux remote desktop clients mentioned in this article, including Remmina, VNC Connect, Anydesk, TigerVNC, and Vinagre are sure to meet your requirements. Evaluate your specific needs and choose the most suitable RDP client to ensure a seamless and efficient remote desktop experience on your Linux system. Still if you have any doubts while choosing the right one feel free to contact us.
At [Lease Packet](https://leasepacket.com/) get reliable RDP Server with instant delivery on major global locations. Lease Packet offers you the best RDP server at the lowest price. The easy graphical interface and Remote Desktop feature make Windows VPS suitable for anyone. Our Windows remote desktop server is reliable and comes with a 24×7 server support guarantee.
| leasepacket |
1,878,915 | Vn138 - Vn138.events Nhà Cái Cá Cược Uy Tín #1 Việt Nam | Vn138 chỉ mới bắt đầu hoạt động tại Việt Nam trong thời gian gần đây. Sự xuất hiện này đã thu hút sự... | 0 | 2024-06-06T07:33:39 | https://dev.to/vn138events/vn138-vn138events-nha-cai-ca-cuoc-uy-tin-1-viet-nam-1eoh | Vn138 chỉ mới bắt đầu hoạt động tại Việt Nam trong thời gian gần đây. Sự xuất hiện này đã thu hút sự quan tâm của cộng đồng cầu thủ Việt, và nhanh chóng nhà cái đã đạt được một triệu thành viên.
Địa Chỉ: 31/2 Đ. Tân Kỳ Tân Quý, Phường 15, Tân Bình, Thành phố Hồ Chí Minh, Việt Nam
Email: duncanfoulk@gmail.com
Website: https://vn138.events/
Điện Thoại: (+63) 9303401219
#vn138 #nhacaivn138 #vn138events #vn138com#casinovn138
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http://www.rohitab.com/discuss/user/2178834-vn138events/ | vn138events | |
1,878,914 | シニア投資家松下 哲也（MATSUSHITA TETSUYA）の市場分析スキル | シニア投資家松下 哲也（MATSUSHITA TETSUYA）の市場分析スキル 松下 哲也氏は、金融分野における豊富な経験と優れた投資ビジョンを持つシニア金融投資家です。過去数十年にわたり、松下... | 0 | 2024-06-06T07:32:43 | https://dev.to/matsushitatetsuya/siniatou-zi-jia-song-xia-zhe-ye-matsushita-tetsuyanoshi-chang-fen-xi-sukiru-2o68 | 松下哲也matsushitatetsuya, 松下哲也 | **シニア投資家松下 哲也（MATSUSHITA TETSUYA）の市場分析スキル**
松下 哲也氏は、金融分野における豊富な経験と優れた投資ビジョンを持つシニア金融投資家です。過去数十年にわたり、松下 哲也氏は市場の詳細な分析と把握を通じて多くの収益性の高い投資に成功し、財務目標を達成してきました。
松下 哲也氏は、テクノロジー、不動産、金融など、さまざまな業界の企業に投資してきました。彼は、質の高い投資機会を発見し、市場の動向を正確に把握することに優れており、それによって目覚ましい投資収益を達成しています。金融投資における彼の成功体験は、豊かな富をもたらしただけでなく、業界での良い評価も確立しました。
金融投資の分野での優れた業績により、松下 哲也氏は複数の賞を受賞しています。彼はインベスター・オブ・ザ・イヤーに選ばれ、大手金融機関からベスト・インベストメント賞を何度も受賞しています。これらの栄誉は、彼の個人的な業績が認められただけでなく、長年にわたる金融分野での努力が認められたものでもあります。
松下 哲也氏の金融投資の経験と業績は、金融界における彼の評価と地位を確立しました。彼は自分の力と努力を駆使して金融投資の成功物語を描き、業界のリーダーになりました。今後の投資でも、松下 哲也氏はその強みとビジョンを活かして、より良い結果を達成し続けると信じています。 | matsushitatetsuya |
1,878,912 | Hallmark Treasor Gandipet Hyderabad | Hallmark Treasor | Hallmark Treasor nestled in the esteemed Gandipet area of Hyderabad, offers a serene escape from city... | 0 | 2024-06-06T07:25:47 | https://dev.to/narendra_kumar_5138507a03/hallmark-treasor-gandipet-hyderabad-hallmark-treasor-1ph8 | realestate, realestateinvestment, realestateagent, hallmarktreasor | Hallmark Treasor nestled in the esteemed Gandipet area of Hyderabad, offers a serene escape from city life while providing convenient access to urban amenities.
These meticulously crafted [**3 BHK homes**](https://hallmarkbuilders.co.in/treasor/) showcase exceptional quality and attention to detail. Each residence promises a sophisticated and peaceful living experience with spacious interiors, lush green landscapes, and state-of-the-art amenities to enhance your lifestyle. Whether you desire elegance and comfort or a quiet sanctuary, Hallmark Treasor meets all your needs.
Discover a home where every detail is designed for your utmost delight, seamlessly blending refined living with the perfect mix of tranquility and convenience. Experience the joy and satisfaction of living in the thoughtfully planned community at Hallmark Treasor.
Contact us: 8595808895
| narendra_kumar_5138507a03 |
1,878,911 | Crafting the Perfect Brand Identity by Logo Magicians | Introduction to Branding In the dynamic landscape of business, where differentiation is... | 0 | 2024-06-06T07:23:43 | https://dev.to/hannatuc1993/crafting-the-perfect-brand-identity-by-logo-magicians-57l5 | logo, designs, graphicdesigns, professionallogodesigners | ## Introduction to Branding
In the dynamic landscape of business, where differentiation is key, a strong brand identity reigns supreme. At its core stands the logo – a potent symbol embodying a brand's essence, values, and character. Enter the Logo Magicians, the creative wizards behind captivating designs that resonate deeply. Join us on a journey into the fascinating realm of [**logo design services in the USA**](https://www.logomagicians.com/), as we unveil the artistry behind crafting emblems that rival the impact of iconic symbols like the [**Amazon Logo**](https://www.logomagicians.com/blog/the-amazon-logo-history-symbolism-and-significance/).
## The Artistry of Logo Design
Logo design is more than just combining colors, shapes, and fonts. It's a delicate dance between artistry and strategy, where every element holds significance. From the sleek curves of the Apple logo to the bold simplicity of the Nike swoosh, iconic logos are born from a meticulous process of ideation, iteration, and refinement. [**Logo Magicians**](https://www.logomagicians.com/) understand the importance of storytelling through design, crafting logos that resonate with the target audience and convey the brand's narrative in a single glance.
## The Power of Brand Identity
A logo is the cornerstone of a brand's identity, serving as a visual representation of its values and mission. As such, it must be carefully crafted to evoke the desired emotions and perceptions. Logo Magicians possess an innate understanding of brand psychology, leveraging color theory, typography, and symbolism to create logos that forge strong connections with consumers. Whether it's instilling trust, evoking nostalgia, or sparking curiosity, a well-designed logo has the power to leave a lasting impression on the subconscious mind.
## The Role of Logo Design Services
In a world inundated with brands vying for attention, [**professional logo design services**](https://www.logomagicians.com/) in the USA play a crucial role in helping businesses carve out their unique identity. These services offer a wealth of expertise, from conducting in-depth market research to creating custom design concepts tailored to the client's vision and values. With their finger on the pulse of design trends and consumer preferences, Logo Magicians possess the skills and knowledge to deliver logos that command attention and leave a lasting impact.
## The Journey of Logo Creation
The journey of logo creation is a collaborative process between the client and the designer, guided by a shared vision of the brand's identity. It begins with a thorough discovery phase, where Logo Magicians immerse themselves in the client's brand story, target audience, and competitive landscape. Armed with this insight, they embark on the creative process, sketching, iterating, and refining until the perfect concept emerges. Through open communication and feedback, clients are actively involved in shaping the final design, ensuring that it resonates with their brand ethos.
## Elevating Your Brand with Logo Magic
A well-crafted logo is more than just a symbol – it's a powerful tool that can elevate your brand to new heights. Logo Magicians understand the importance of creating a cohesive brand identity that extends across all touchpoints, from business cards to websites to social media profiles. By harnessing the magic of design, they help businesses leave a memorable impression on their audience, fostering brand loyalty and driving long-term success.
## Conclusion
In the ever-evolving landscape of business, the role of Logo Magicians remains as crucial as ever. Their ability to weave together artistry, strategy, and storytelling enables brands to carve out their unique identity in a crowded marketplace. As businesses continue to recognize the importance of a strong brand presence, the demand for professional logo design services in the USA will only continue to grow. So, embrace the magic of design and watch as your brand takes flight on the wings of creativity and innovation. | hannatuc1993 |
1,878,756 | Deploying WordPress on a Private Subnet in AWS EC2 Using a Linux Server | After conquering the AWS Cloud Resume Challenge, I decided to build another project that would... | 0 | 2024-06-06T07:21:22 | https://dev.to/madhesh_waran_63/deploying-wordpress-on-a-private-subnet-in-aws-ec2-using-a-linux-server-4a65 | devops, aws, cloud, tutorial | After conquering the AWS Cloud Resume Challenge, I decided to build another project that would broaden my cloud skills. This time I wanted to deploy the WordPress application using a secure LAMP stack on a private subnet.
The LAMP stack consists of Linux, Apache, MySQL, and PHP and provides an efficient server environment for application development and web hosting.
Here, I will take you through the process of setting up a LAMP stack and deploying WordPress on a private subnet to host secure websites.
The first thing you should do is create a VPC with private and public subnets. Let's see how it's done.
## Creating a VPC:
Log in to your AWS console and select Create VPC on Your VPC section. There are 2 ways you can go. You can select the VPC section and configure the rest later or select VPC and More and configure it all then and there. I decided to configure everything by myself, so I selected the first option. If you want to skip some steps, select the more options. Anyways, when asked to specify an IPv4 CIDR block for your VPC, put some publicly available IPv4 CIDRs. I put 10.0.0.0/16 which has a range of 65,536 IP addresses from 10.0.0.0 to 10.0.255.255. After creating this VPC, we should start creating the public and private subnets that we will be using for this project.
## Creating our required subnets:
For my purpose, I needed 2 public subnets and 4 private subnets in 2 Availability Zones. To create it, go to the subnet section of your VPC and select Create Subnet. Select the VPC ID of the VPC you just created and fill in the details of the first subnet. Click Add New Subnets for as many subnets as you need and fill them with your desired details.
For my project, I filled them as below:
Subnet name - public-subnet-1
Availability Zone - us-east-1
CIDR block for the subnet: 10.0.0.0/24
Subnet name - private-subnet-1
Availability Zone - us-east-1
CIDR block for the subnet: 10.0.1.0/24
Subnet name - public-subnet-2
Availability Zone - us-east-1
CIDR block for the subnet: 10.0.2.0/24
Subnet name - private-subnet-2
Availability Zone - us-east-1
CIDR block for the subnet: 10.0.3.0/24
Subnet name - public-subnet-3
Availability Zone - us-east-1
CIDR block for the subnet: 10.0.4.0/24
Subnet name - private-subnet-3
Availability Zone - us-east-1
CIDR block for the subnet: 10.0.5.0/24
After creating the subnet, we need to give them a connection outside of the VPC using gateways.
## Creating Internet and NAT gateways:
Internet gateway is the primary reason that determines the difference between public and private subnets. A subnet that routes traffic to IGW is a public subnet and one that doesn't automatically become a private subnet. Create an Internet Gateway from your VPC section and attach it to the VPC that you created.
Private subnets need some way to communicate with the outside world. This can be done by NAT gateways. A NAT gateway is placed in a public subnet and acts like a proxy for traffic from private subnets in the VPC to the rest of the internet. Create a NAT gateway by choosing a public subnet as its subnet and Allocate Elastic IP. After creating the gateways, we need to configure their traffic by using the Route table.
## Configure Route Tables:
The main table that is created while we deploy our VPC is the route table that will be used as the default table for subnets that do not have any table associated with them. We should configure them to be private by making this main table target the NAT gateway. This can be done by clicking Edit Routes and then clicking Add Route. Enter 0.0.0.0/0 as the Destination and
select NAT Gateway as the Target then select the NAT gateway you created before.
We should create a new public route table for the public subnets that target the IGW. Create a new route table and associate it with the VPC that you just deployed. Clicking Edit routes and then click Add route and configure the table by entering 0.0.0.0/0 as the Destination and
selecting Internet Gateway as the Target then selecting the NAT gateway you created above. Now navigate back to the route tables list and select the public route table you just created. Select the Subnet Associations tab click on Edit subnet associations and pick public-subnet-1 and public-subnet-2 subnets you created and save them to make them public subnets.
Doing this will ensure that you have an AWS VPC (Virtual Private Cloud) with public and private subnets with NAT gateway access for private subnets.
For more details refer to [this document.](https://docs.aws.amazon.com/vpc/latest/userguide/create-vpc.html)
Now that the networking part of the project is over, let's create the instance that will host and deploy our WordPress dependencies.
## Creating an Amazon Linux 2023 Instance:
Almost all of the tutorials and guides for setting up LAMP stack out there are based on Amazon Linux 2 AMI or Ubuntu AMI, so to keep things fresh let's deploy the LAMP stack on an Amazon Linux 2023 Image EC2 instance.
Navigate to the EC2 dashboard and click on “Launch Instance”. Choose the most recent “Amazon Linux 2023 AMI”. Choose the t2.micro instance that qualifies for the AWS free tier. You won't be using key pairs to SSH into that instance but if you wish you can Use an Existing Key Pair or Create a New Key Pair. Click the edit button next to network settings and enter the following details to deploy the instance in our private subnet.
VPC - (Choose the VPC you deployed)
Subnet - (Choose one of the private subnets eg: public_subnet_1)
Create a new security group with the following configuration:
SSH: Port 22 Protocol: TCP (Source: Anywhere)
HTTP: Port 80 Protocol: TCP (Source: Anywhere).
HTTPS: Port 443 Protocol: TCP (Source: Anywhere).
Click on “Launch Instance” once everything’s set.
Now since the instance is completely locked down in the private subnet, you cannot access it using normal ways. If you require additional access via SSH or Remote Desktop, you can try one of the following ways.
1) Use a Bastion host in a public subnet that can SSH into our private secure instance in the private subnet. (Old way of doing things, incurs costs due to the provision of EC2 resources)
2) Connect to the private EC2 Instances using SSM.
3) Connect using EC2 Instance Connect Endpoint.
There are loads of resources available for the first method. You can use this [link](https://towardsdatascience.com/going-bastion-less-accessing-private-ec2-instance-with-session-manager-c958cbf8489f) for a detailed tutorial on using the second method. This article will guide you through the third method.
In the instance that you created, click on the connect button at the top. Select EC2 instance connect and click on Connect using EC2 Instance Connect Endpoint. The EC2 Instance Connect Endpoint sublist will be empty so we need to create one. Click on Create New Endpoint and you will be redirected to the VPC section. Select Endpoint and click on Create New Endpoint. Name the Endpoint and choose EC2 Instance Connect Endpoint as the Service Category. Select your VPC and create a new SG with no inbound rules and an Outbound rule allowing all traffic. Choose this SG for your endpoint. Select the same subnet that your instance is running on (eg: private_subnet_1). Now create the endpoint and choose it as the endpoint for EC2 Instance Connect Endpoint. Now this will allow you to SSH into your instance on the private server.
Now that we can access our instance, we can SSH into it and set up and deploy our WordPress package. Let's leave the EC2 Instance Connect page alone for now.
Before starting this let us create the RDS database that will store all our data.
## Creating RDS Database:
Instead of creating a host database, we are creating a new RDS database in another subnet and connecting it to our instance. Create a Database with the following configurations:
Engine: MySQL
Template: Free Trial
DB Instance Identifier: wp_database
Master Username: admin
Autogenerate or type in your password (remember this if you typed it in)
DB Instance Class: db.t3.micro
Connectivity: Don't Connect to an EC2 Compute Resource
VPC: (Choose your VPC)
Subnet Group: Default
Public Access: No
Choose the default option for rest and create the database.
After creating the database, edit the inbound rules for the SG security group by adding a rule of type MYSQL/Aurora and Source being Custom and the ID of your instance security group(This step is very important).
<u>Now write down the Username, Password and get the DB endpoint address</u> (It will usually be like wp-database.msifunffjxhn.us-east-1.rds.amazonaws.com)
Now this will ensure that your instance can access the RDS database.
Now let's SSH into the instance using EC2 Instance Connect Endpoint and set up and deploy our LAMP stack and WordPress application.
## Setting up LAMP Stack:
Type the following codes in the instance command shell to install and run the LAMP stack.
`sudo dnf update -y
`
`sudo dnf install -y httpd wget php-fpm php-mysqli php-json php php-devel
`
`sudo dnf install mariadb105-server
`
`sudo systemctl start httpd
`
`sudo systemctl enable httpd
`
`sudo systemctl enable mariadb
sudo systemctl start mariadb
`
To connect our RDS database with Wordpress,
`
mysql -h wp_database.xxxxx.us-east-1.rds.amazonaws.com -u admin -p`
(Note: do not copy-paste this, ~~wp_database.xxxxx.us-east-1.rds.amazonaws.com~~. Get your endpoint address from your RDS Database)
Enter Password: (Note: The password you type will be blank.) (This password is the one you configured while creating RDS database).
## Deploying WordPress:
`cd /tmp
sudo wget https://wordpress.org/latest.tar.gz
sudo tar xzvf latest.tar.gz
`
`cd Wordpress
sudo mv * /var/www/html/
cd /var/www/html/
sudo mv wp-config-sample.php wp-config.php
sudo nano wp-config.php`
Replace database details with the name, user, and password you just created. Replace localhost with your RDS database endpoint (wp_database.xxxxx.us-east-1.rds.amazonaws.com).
Now your instance will have all the necessary dependencies to host WordPress. But you have no way of accessing it since it is in the private subnet. To access it, you need to use an Application Load Balancer to route all the HTTP traffic to the instance.
## Deploying Load Balancer:
Create a security group for the Load balancer. Edit Inbound rules to HTTP/80/Anywhere.
Create Target groups so that the load balancer routes the traffic to the registered targets in the Target group. Provide the target group name, Protocol, Port, VPC, and Health checks. Register the two Private EC2 instances in the Target group
It is now time to create the Application Load Balancer
Give a name to the ALB. Select the VPC you created and click on one of the public Subnets in ALB (only Public Subnets will receive HTTP requests).Add the security group you created. Choose the Target group created above under Listeners and Routing. Wait for 5 mins.
Copy the DNS name from Load Balancer and paste the DNS address in a browser.
You should be able to see the WordPress Configuration page.
Enjoy.
| madhesh_waran_63 |
1,878,872 | Mastering Package Management in Debian and Ubuntu Systems | Package management is a fundamental aspect of any Linux distribution, ensuring that software can be... | 0 | 2024-06-06T07:19:27 | https://dev.to/iaadidev/mastering-package-management-in-debian-and-ubuntu-systems-2omc | ubuntu, linux, devops, bash |
Package management is a fundamental aspect of any Linux distribution, ensuring that software can be easily installed, upgraded, and maintained. In Debian-based systems such as Ubuntu, the Advanced Package Tool (APT) and other related tools provide a powerful and flexible package management system. This extensive guide covers advanced package management techniques, including repository management, package pinning, package holds, dependency resolution, and more. By the end, you will be equipped with the knowledge to expertly manage packages on your Debian-based system.
### Table of Contents
1. **Introduction to APT and Debian Package Management**
2. **Repository Management**
- Adding and Removing Repositories
- Using PPAs (Personal Package Archives)
- Managing Repository Priorities
3. **Package Pinning**
- Creating Pinning Rules
- Examples of Pinning Scenarios
4. **Holding and Unholding Packages**
5. **Advanced APT Commands**
- APT Flags and Options
- Simulating Actions
6. **Dependency Management**
- Understanding Dependencies
- Resolving Dependency Issues
7. **Building and Managing Custom Packages**
- Building DEB Packages
- Managing Local Repositories
8. **Using Advanced Package Tools**
- Aptitude
- dpkg
- debconf
9. **Automating Package Management with Scripts**
10. **Best Practices for Package Management**
11. **Troubleshooting Common Issues**
### 1. Introduction to APT and Debian Package Management
The Advanced Package Tool (APT) is the core package management system for Debian-based distributions. It provides a user-friendly interface for managing software packages, handling tasks such as installing, updating, and removing software. APT works with `dpkg`, the low-level package manager, to perform these operations.
#### Basic APT Commands
Before diving into advanced techniques, let's review some basic APT commands:
- **Updating Package Lists:**
```bash
sudo apt update
```
- **Upgrading Packages:**
```bash
sudo apt upgrade
```
- **Installing Packages:**
```bash
sudo apt install package_name
```
- **Removing Packages:**
```bash
sudo apt remove package_name
```
### 2. Repository Management
Repositories are collections of software packages that APT can retrieve and install. Managing repositories effectively allows you to control where your system obtains its software.
#### Adding and Removing Repositories
Repositories are defined in files located in `/etc/apt/sources.list` or `/etc/apt/sources.list.d/`.
- **Adding a Repository:**
To add a new repository, you can edit the sources list directly or add a new file in `/etc/apt/sources.list.d/`:
```bash
sudo add-apt-repository 'deb http://repository_url/ubuntu distribution component'
```
For example, to add the Google Chrome repository:
```bash
sudo add-apt-repository 'deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main'
```
After adding the repository, update the package list:
```bash
sudo apt update
```
- **Removing a Repository:**
To remove a repository, you can edit the sources list or remove the relevant file from `/etc/apt/sources.list.d/`:
```bash
sudo add-apt-repository --remove 'deb http://repository_url/ubuntu distribution component'
```
#### Using PPAs (Personal Package Archives)
PPAs are repositories hosted on Launchpad, allowing developers to distribute software easily.
- **Adding a PPA:**
```bash
sudo add-apt-repository ppa:repository_name
sudo apt update
```
For example, to add the PPA for the latest version of `git`:
```bash
sudo add-apt-repository ppa:git-core/ppa
sudo apt update
```
- **Removing a PPA:**
```bash
sudo add-apt-repository --remove ppa:repository_name
sudo apt update
```
#### Managing Repository Priorities
APT uses priority levels to determine which repository's packages should be preferred. This is managed through the `/etc/apt/preferences` file or files in `/etc/apt/preferences.d/`.
- **Creating a Preferences File:**
```bash
sudo nano /etc/apt/preferences.d/custom_preferences
```
- **Setting Priorities:**
```plaintext
Package: *
Pin: release a=stable
Pin-Priority: 900
Package: *
Pin: release a=unstable
Pin-Priority: 400
```
This configuration sets the priority for the stable repository higher than the unstable repository.
### 3. Package Pinning
Package pinning allows you to control the version of packages that are installed on your system. This is useful for maintaining specific versions or avoiding upgrades to unstable versions.
#### Creating Pinning Rules
Pinning rules are defined in the `/etc/apt/preferences` file or files within `/etc/apt/preferences.d/`.
- **Example Pinning Rule:**
```plaintext
Package: apache2
Pin: version 2.4.29-1ubuntu4.14
Pin-Priority: 1001
```
This rule pins the `apache2` package to a specific version.
#### Examples of Pinning Scenarios
- **Pinning a Package to a Specific Version:**
```plaintext
Package: firefox
Pin: version 89.0*
Pin-Priority: 1001
```
- **Preventing a Package from Being Upgraded:**
```plaintext
Package: bash
Pin: release *
Pin-Priority: -1
```
### 4. Holding and Unholding Packages
Holding packages prevents them from being upgraded. This is useful when you need to maintain a specific version of a package.
- **Holding a Package:**
```bash
sudo apt-mark hold package_name
```
Example:
```bash
sudo apt-mark hold firefox
```
- **Unholding a Package:**
```bash
sudo apt-mark unhold package_name
```
Example:
```bash
sudo apt-mark unhold firefox
```
### 5. Advanced APT Commands
#### APT Flags and Options
APT commands come with numerous flags and options to control their behavior.
- **Force Yes:**
```bash
sudo apt-get --yes --force-yes install package_name
```
- **Fix Broken:**
```bash
sudo apt --fix-broken install
```
#### Simulating Actions
Simulating actions allows you to preview changes without actually applying them.
- **Simulating an Upgrade:**
```bash
sudo apt-get --simulate upgrade
```
- **Simulating an Installation:**
```bash
sudo apt-get --dry-run install package_name
```
### 6. Dependency Management
#### Understanding Dependencies
Dependencies are other packages required for a package to function properly. APT automatically handles dependencies, but understanding them can help troubleshoot issues.
- **Viewing Package Dependencies:**
```bash
apt-cache depends package_name
```
Example:
```bash
apt-cache depends apache2
```
#### Resolving Dependency Issues
Sometimes, dependency issues can arise, requiring manual intervention.
- **Fixing Broken Dependencies:**
```bash
sudo apt --fix-broken install
```
- **Installing Specific Versions:**
```bash
sudo apt install package_name=version
```
Example:
```bash
sudo apt install apache2=2.4.29-1ubuntu4.14
```
### 7. Building and Managing Custom Packages
#### Building DEB Packages
Building your own DEB packages allows you to distribute custom software. The `dpkg-deb` tool is used for this purpose.
- **Creating a DEB Package:**
1. **Create the Directory Structure:**
```bash
mkdir -p mypackage/DEBIAN
mkdir -p mypackage/usr/local/bin
```
2. **Create the Control File:**
```bash
nano mypackage/DEBIAN/control
```
Example control file:
```plaintext
Package: mypackage
Version: 1.0
Section: base
Priority: optional
Architecture: all
Essential: no
Maintainer: Your Name <youremail@example.com>
Description: My custom package
```
3. **Add the Software:**
```bash
echo 'echo "Hello, world!"' > mypackage/usr/local/bin/mypackage
chmod +x mypackage/usr/local/bin/mypackage
```
4. **Build the Package:**
```bash
dpkg-deb --build mypackage
```
This command creates a DEB package that can be installed using APT or dpkg.
#### Managing Local Repositories
Local repositories allow you to manage and distribute custom packages within your organization.
- **Creating a Local Repository:**
1. **Install `dpkg-dev`:**
```bash
sudo apt install dpkg-dev
```
2. **Create the Repository Directory:**
```bash
mkdir -p /path/to/repo
cp mypackage.deb /path/to/repo
```
3. **
Generate the Package Index:**
```bash
cd /path/to/repo
dpkg-scanpackages . /dev/null | gzip -9c > Packages.gz
```
4. **Add the Local Repository to APT:**
```bash
echo "deb file:/path/to/repo ./" | sudo tee /etc/apt/sources.list.d/local.list
sudo apt update
```
### 8. Using Advanced Package Tools
#### Aptitude
Aptitude is an advanced interface to APT, providing more functionality and a text-based interface.
- **Installing Aptitude:**
```bash
sudo apt install aptitude
```
- **Using Aptitude:**
```bash
sudo aptitude
```
Aptitude allows for interactive package management, including searching, installing, and removing packages.
#### dpkg
`dpkg` is the underlying package manager for Debian-based systems. It provides low-level package management functions.
- **Installing a DEB Package:**
```bash
sudo dpkg -i package.deb
```
- **Removing a Package:**
```bash
sudo dpkg -r package_name
```
- **Listing Installed Packages:**
```bash
dpkg -l
```
#### debconf
`debconf` is a configuration management system for Debian packages.
- **Reconfiguring a Package:**
```bash
sudo dpkg-reconfigure package_name
```
### 9. Automating Package Management with Scripts
Automating package management can save time and ensure consistency across multiple systems.
- **Example Script to Install Packages:**
```bash
#!/bin/bash
PACKAGES=(
"curl"
"git"
"vim"
)
for package in "${PACKAGES[@]}"; do
sudo apt install -y $package
done
```
- **Running the Script:**
```bash
chmod +x install_packages.sh
./install_packages.sh
```
### 10. Best Practices for Package Management
- **Regularly Update Your System:**
```bash
sudo apt update && sudo apt upgrade
```
- **Use Repositories Wisely:**
Only add trusted repositories to avoid security risks.
- **Monitor Package Changes:**
Keep track of installed packages and changes using tools like `aptitude`.
- **Backup Configuration Files:**
Before upgrading or removing packages, backup important configuration files.
- **Automate Repetitive Tasks:**
Use scripts to automate package management tasks.
### 11. Troubleshooting Common Issues
- **Broken Packages:**
```bash
sudo apt --fix-broken install
```
- **Unmet Dependencies:**
```bash
sudo apt install -f
```
- **Locked Package Manager:**
If the package manager is locked, remove the lock file:
```bash
sudo rm /var/lib/dpkg/lock-frontend
sudo rm /var/lib/dpkg/lock
```
- **Debugging APT:**
Use the `-o Debug::pkgProblemResolver=yes` flag to get detailed information about dependency resolution:
```bash
sudo apt-get -o Debug::pkgProblemResolver=yes install package_name
```
### Conclusion
Advanced package management in Debian-based systems like Ubuntu offers powerful tools and techniques to maintain and optimize your system. From managing repositories and dependencies to building custom packages and automating tasks, mastering these skills will significantly enhance your ability to administer Linux systems effectively.
By understanding and implementing the concepts covered in this guide, you can ensure a robust and efficient package management process, keeping your system secure, up-to-date, and tailored to your needs. Happy package managing! | iaadidev |
1,878,731 | CSS Art: June was made for happiness | This is a submission for Frontend Challenge v24.04.17, CSS Art: June. Inspiration The... | 0 | 2024-06-06T07:19:10 | https://dev.to/tanveermahendra/css-art-june-was-made-for-happiness-5acm | frontendchallenge, devchallenge, css, june2024 | _This is a submission for [Frontend Challenge v24.04.17](https://dev.to/challenges/frontend-2024-05-29), CSS Art: June._
## Inspiration
The idea for this project blossomed from a casual conversation with my friend [Ritul Choudhary](https://www.instagram.com/ritulchoudhary) over Discord. In search of inspiration, Ritul found several poems about June, and [this one by Annette Wynne](https://thedailygardener.org/june-was-made-for-happiness/) resonated deeply with him. Captivated by the poem's imagery, we decided to transform its essence into a visual representation.
To bring our vision to life, we enlisted the help of our talented artist friend [Niranjan Bharati](https://www.instagram.com/puntorturedartist/). He skillfully translated the poem's elements onto a 100px x 200px canvas, creating a beautiful piece of pixel art that encapsulates the poem's serene and joyful spirit.
The artwork depicts a tender moment between a mother and her daughter on a summer afternoon. They are seated in a lush grassland, surrounded by pink tulips and fluttering butterflies, while the mother reads a book to her daughter. The scene is set against a backdrop of majestic mountains and a sky dominated by a large, fluffy cloud, partially veiling the sun. This imagery perfectly captures the poem's celebration of June's simple pleasures and the happiness found in nature.
## Demo
{% codepen https://codepen.io/tanveermahendra/pen/YzbQQwj %}
Github: [Source Code](https://github.com/tanveermahendra/css-art-june24)
## The Art Process
Our journey began with a simple idea and evolved into a beautiful piece of digital art. Here are the steps we took to create our pixel art masterpiece:
1. **Initial Sketch:**
We started with a basic sketch to outline the elements we wanted to include. This initial sketch helped us visualize the overall composition and placement of key elements like the mother, daughter, butterflies, and the surrounding nature.
2. **Defining Shapes and Colors:**
Next, we began defining the shapes and adding basic colors. This stage was crucial in establishing the structure and color palette of the artwork. We focused on ensuring the characters and elements were easily recognizable and aligned with the mood of the poem.
3. **Adding Details:**
With the basic shapes and colors in place, we moved on to adding details. This included refining the characters, enhancing the background elements, and adding textures to make the scene more vibrant and lively.
4. **Final Touches:**
In the final stage, we added the finishing touches to the artwork. This involved adjusting colors, smoothing out lines, and ensuring all elements were cohesive. The result was a beautiful pixel art piece that captured the essence of Annette Wynne's poem.
## Journey and What I Learned
Why 100px x 200px, you might ask? Well, as this was my first CSS art project, I wanted to keep it simple and draw it in pixel-art form. I followed this [useful tutorial](https://www.youtube.com/watch?v=LjlHcmEclFE) to get started. Soon, I realized that creating a 100px by 200px image would require me to write 20,000 individual values to generate the art. The art size restriction we had set earlier wasn't small enough. But here we were, so I decided to automate the CSS pixel values generation.
```
from PIL import Image
def pixel_to_em(pixel, em_scale):
return pixel * em_scale
def image_to_css_box_shadow(image_path, width_em, height_em):
img = Image.open(image_path)
img = img.convert('RGBA')
width_px, height_px = img.size
# Calculate em scaling factors based on provided width and height
em_scale_x = width_em / width_px
em_scale_y = height_em / height_px
box_shadows = []
for y in range(height_px):
for x in range(width_px):
r, g, b, a = img.getpixel((x, y))
if a > 0: # If pixel is not transparent
x_em = pixel_to_em(x, em_scale_x)
y_em = pixel_to_em(y, em_scale_y)
hex_color = f'#{r:02x}{g:02x}{b:02x}'
box_shadows.append(f'{x_em}em {y_em}em {hex_color}')
return ', '.join(box_shadows)
if __name__ == "__main__":
image_path = 'final-art.png'
width_em = 100 # The width of the image in em units
height_em = 200 # The height of the image in em units
css_box_shadow = image_to_css_box_shadow(image_path, width_em, height_em)
print(f'box-shadow: {css_box_shadow};')
```
The Python code above takes the constraint of 1em as a base unit in CSS and translates the pixel values into em counterparts. The logic is to iterate over the image, pick individual pixel values, and convert them into a CSS `box-shadow` property in the format: `'x'em 'y'em #xxxxxx`. Then, the script joins them with a comma separator. I ran the Python script and saved the output in a text file to later copy-paste into the `style.css` file.
This worked perfectly, and we were able to see the CSS code come to life! While discussing the results, we felt that the dimensions resembled a bookmark. Why not transform this into a digital bookmark? So, that's what we started looking into. I found this [amazing tutorial by w3schools](https://www.w3schools.com/howto/howto_css_flip_card.asp) and applied the learnings to our project.
The poem was the perfect candidate for the back side of the digital bookmark. I added a hover interaction on the parent `<div>` of the flip card to allow everyone to appreciate the inspiration behind the artwork. As a final touch, applied the [Noto Sans font by Google](https://fonts.google.com/noto/specimen/Noto+Sans) to the back side of the bookmark.
Through this project, I learned the importance of variables, and automation in CSS art projects. Automating repetitive tasks not only saves time but also allows for more complex and detailed creations. Additionally, incorporating interactive elements like the flip card adds a layer of engagement and depth to the final piece.
If you have any questions, feel free to ask them in the comments. | tanveermahendra |
1,878,871 | Examining Liv pure supplement A Thorough Analysis | Official 1 Month) Liv Pure Capsules Liver Detox Pills In today's fast-paced world, prioritising our... | 0 | 2024-06-06T07:19:04 | https://dev.to/vinay_saini_6970101da4907/examining-liv-pure-supplement-a-thorough-analysis-hbo | healthydebate | Official 1 Month) Liv Pure Capsules Liver Detox Pills
In today's fast-paced world, prioritising our health has never been more essential. With hectic schedules and endless demands, it's easy to overlook our well-being. Thankfully, the health and wellness industry continues to innovate, providing solutions to support our bodies in achieving better health. One such solution gaining attention is Liv Pure, a supplement renowned for its unique blend of natural ingredients and promising health benefits.
Visit site :- [https://www.live--pure.com/](https://www.live--pure.com/)
Understanding the Importance of Dietary Supplements:
Before diving into the specifics of Liv Pure, it's crucial to understand why dietary supplements have become integral to many people's wellness routines. Despite our efforts to maintain a balanced diet, obtaining all the necessary nutrients can be challenging due to busy lifestyles, dietary restrictions, and other factors.
The Science Behind Liv Pure:
[Liv Pure ](https://www.live--pure.com/)stands out as more than just another supplement. It's a meticulously formulated blend designed to address various health concerns. Its effectiveness lies in scientifically backed ingredients, each selected for its specific contribution to overall well-being.
Collagen Peptides:
Liv Pure features high-quality collagen peptides, essential proteins crucial for skin, hair, nails, and joint health. Collagen supports skin elasticity, joint health, and a youthful appearance.
Turmeric Extract:
Turmeric, with its potent anti-inflammatory properties, is a star ingredient in [Liv Pure](https://www.live--pure.com/). Curcumin, its active compound, has been extensively studied for its ability to reduce inflammation, support joint health, and boost the immune system.
Ashwagandha:
Included for its stress-relieving properties, ashwagandha is an adaptogenic herb known to promote balance and well-being, helping the body adapt to stress.
Vitamin C:
Liv Pure is fortified with vitamin C, a powerful antioxidant crucial for immune support, collagen synthesis, and overall skin health.
| vinay_saini_6970101da4907 |
1,878,870 | Zencortex: A Comprehensive Review 2024. | Click to order Now :- https://www.zencortexe.com/<<<<< What is... | 0 | 2024-06-06T07:16:07 | https://dev.to/vinay_saini_6970101da4907/zencortex-a-comprehensive-review-2024-5g84 | zencortex | >>>>>Click to order Now :-[ https://www.zencortexe.com/](https://www.zencortexe.com/)<<<<<
What is Zencortex?
Zencortex is a nootropic supplement designed to support cognitive function and mental performance. It is formulated with a blend of natural ingredients. each selected for its purported ability to enhance various aspects of brain health. The supplement is marketed as a tool to improve focus, memory, concentration, and overall cognitive function.
Key Ingredients of Zencortex.
Bacopa Monnieri:
Bacopa is an herb known for its traditional use in Ayurvedic medicine to support memory and cognitive function. Research suggests that Bacopa may enhance cognitive performance by reducing anxiety and improving memory formation.
L-Theanine:
Found naturally in green tea, L-Theanine is known for its calming effects. It may promote relaxation without causing drowsiness, making it an ideal ingredient for improving focus and attention.
Phosphatidylserine:
Phosphatidylserine is a phospholipid that plays a crucial role in cell membrane structure and function, particularly in the brain. It has been studied for its potential to improve memory, learning, and cognitive function, especially in older adults.
Ginkgo Biloba:
Ginkgo Biloba extract is derived from the leaves of the Ginkgo tree and has long been used in traditional Chinese medicine. It is believed to improve blood flow to the brain, thereby enhancing cognitive function, concentration, and memory.
Rhodiola Rosea:
Rhodiola is an adaptogenic herb known for its ability to help the body adapt to stress. It may improve mental performance, reduce fatigue, and enhance mood, making it a valuable addition to cognitive supplements.
Potential Benefits of Zencortex
Enhanced Focus and Concentration:
The combination of ingredients in [Zencortex, ](https://www.zencortexe.com/)such as L-Theanine and Bacopa Monnieri, may help improve focus and concentration, allowing users to stay alert and attentive for longer periods.
Improved Memory Retention:
Phosphatidylserine and Ginkgo Biloba are believed to support memory function, potentially leading to better retention of information and improved cognitive performance, particularly in tasks requiring memory recall.
Reduced Stress and Anxiety:
Rhodiola Rosea is known for its stress-relieving properties, which may help individuals maintain a calmer state of mind, reduce anxiety levels, and improve overall cognitive function.
Enhanced Mental Clarity:
By promoting optimal brain health and circulation,[ Zencortex](https://www.zencortexe.com/) may contribute to enhanced mental clarity, enabling users to think more clearly and make decisions with greater precision.
Does Zencortex Live Up to the Hype?
While Zencortex boasts a promising blend of ingredients backed by scientific research, individual results may vary. Some users may experience noticeable improvements in cognitive function, while others may not perceive significant changes. Factors such as dosage, frequency of use, and individual differences in brain chemistry and physiology can influence the efficacy of the supplement.
It's essential to approach cognitive supplements like Zencortex as part of a holistic approach to brain health, including adequate sleep, regular exercise, a balanced diet, and mental stimulation. Additionally, consulting with a healthcare professional before starting any new supplement regimen is advisable, especially for individuals with underlying medical conditions or those taking medicine.
Conclusion
In conclusion,[ Zencortex ](https://www.zencortexe.com/)offers a blend of natural ingredients aimed at supporting cognitive function and mental performance. While the supplement shows promise in enhancing focus, memory, and overall brain health, individual experiences may vary. Incorporating Zencortex into a comprehensive approach to brain health, including lifestyle modifications and professional guidance, may yield the best results for those seeking to unlock their mind's full potential.As with any supplement, it's essential to approach Zencortex with realistic expectations and prioritize overall well-being. By doing so, individuals can make informed decisions about incorporating Zencortex into their daily routine to support optimal cognitive function and mental clarity. | vinay_saini_6970101da4907 |
1,878,869 | What is Performance Testing?Types of Performance Testing | Performance testing is a crucial aspect of the software development lifecycle, aimed at ensuring that... | 0 | 2024-06-06T07:15:33 | https://dev.to/testscenario/what-is-performance-testingtypes-of-performance-testing-4mfi | testing | Performance testing is a crucial aspect of the software development lifecycle, aimed at ensuring that applications function correctly under expected workloads. It involves evaluating various performance metrics such as speed, responsiveness, stability, and scalability to determine how a system behaves under different conditions. This article explores what performance testing is, its significance, and the various types of performance testing used to ensure optimal software performance.
Understanding Performance Testing
Definition
Performance testing is a non-functional testing technique performed to determine how a system performs in terms of responsiveness and stability under a particular workload. It helps identify and eliminate performance bottlenecks in the software application.
## Importance of Performance Testing
Ensures Stability: Verifies that the application remains stable under varying loads.
Enhances User Experience: Ensures that users have a smooth and responsive experience.
Identifies Bottlenecks: Helps in identifying performance issues and bottlenecks that can affect the user experience.
Validates Scalability: Ensures the application can scale to meet the demands of increasing users and data volume.
Improves Optimization: Assists in optimizing resource usage, such as CPU, memory, and network bandwidth.
## Types of Performance Testing
There are several types of performance testing, each serving a specific purpose in ensuring the software performs optimally under various conditions.
1. Load Testing
Overview
Load testing involves testing the system's performance under expected load conditions. The primary goal is to identify performance bottlenecks before the software application goes live.
Key Aspects
Simulated User Load: Tests how the application behaves under a specific number of users.
Response Time: Measures the time taken for the application to respond under load.
Throughput: Evaluates the amount of data processed by the application in a given time frame.
Use Cases
E-commerce Websites: Ensuring the website can handle high traffic during peak shopping seasons.
Online Services: Testing online services like banking and booking systems to handle a large number of transactions simultaneously.
2. Stress Testing
Overview
Stress testing involves testing the system beyond its normal operational capacity to determine its breaking point. The goal is to identify how the system behaves under extreme conditions and to ensure it fails gracefully.
Key Aspects
Extreme Conditions: Tests the system under extreme user loads, data volumes, or resource constraints.
Failure Points: Identifies the point at which the system fails or degrades in performance.
Recovery: Evaluates how well the system recovers after failure.
Use Cases
Financial Systems: Ensuring banking applications can handle extreme transaction loads during financial crises.
Critical Applications: Testing critical applications like healthcare systems to ensure they perform under extreme conditions.
3. Endurance Testing (Soak Testing)
Overview
Endurance testing, also known as soak testing, involves testing the system over an extended period to identify performance issues that may arise from prolonged usage.
Key Aspects
Long-term Performance: Evaluates the system’s performance over an extended period.
Resource Leaks: Identifies memory leaks and other resource depletion issues.
Stability: Ensures the system remains stable over time.
Use Cases
Streaming Services: Testing streaming services like Netflix to ensure continuous performance over long viewing sessions.
Enterprise Applications: Evaluating enterprise applications that are used continuously over long periods.
4. Spike Testing
Overview
Spike testing involves testing the system’s performance under sudden and extreme changes in load. The goal is to determine how the system handles unexpected spikes in user load.
Key Aspects
Sudden Load Changes: Tests the system’s response to sudden, extreme increases in load.
System Behavior: Evaluates the system’s ability to handle and recover from sudden spikes.
Use Cases
Ticket Booking Systems: Ensuring ticket booking systems can handle sudden spikes in traffic during popular events.
Social Media Platforms: Testing social media platforms to handle viral content that generates sudden traffic spikes.
5. Volume Testing
Overview
Volume testing involves testing the system with a large volume of data to determine its performance and behavior. The primary goal is to identify any issues related to data handling and processing.
Key Aspects
Data Volume: Evaluates the system’s performance with a large volume of data.
Data Integrity: Ensures data integrity and accuracy under high data volumes.
Throughput: Measures the system’s ability to process large data volumes efficiently.
Use Cases
Big Data Applications: Testing big data applications to handle and process large datasets.
Database Systems: Evaluating database systems for performance with large data volumes.
6. Scalability Testing
Overview
Scalability testing involves testing the system’s ability to scale up or down to meet changing user loads. The goal is to ensure the application can handle growth without compromising performance.
Key Aspects
Horizontal Scaling: Evaluates the system’s ability to scale horizontally by adding more nodes.
Vertical Scaling: Tests the system’s performance when scaled vertically by adding more resources to existing nodes.
Performance Metrics: Measures key performance metrics such as response time, throughput, and resource usage under scaled conditions.
Use Cases
Cloud Applications: Testing cloud-based applications to ensure they can scale to meet increasing user demand.
Distributed Systems: Evaluating distributed systems for scalability and performance.
7. Configuration Testing
Overview
Configuration testing involves testing the system’s performance under various configuration settings. The goal is to determine the optimal configuration for the best performance.
Key Aspects
Configuration Settings: Evaluates different configuration settings and their impact on performance.
Optimal Configuration: Identifies the optimal configuration for maximum performance.
Use Cases
Web Servers: Testing web server configurations to determine the best settings for performance.
Database Systems: Evaluating database configurations for optimal performance.
Best Practices for Performance Testing
To ensure effective performance testing, it is essential to follow best practices that cover planning, execution, and analysis.
1. Define Clear Objectives
Specific Goals: Define specific performance goals and objectives.
Key Metrics: Identify key performance metrics such as response time, throughput, and resource usage.
2. Create a Realistic Test Environment
Production-like Environment: Create a test environment that closely resembles the production environment.
Resource Allocation: Ensure adequate resources are allocated for performance testing.
3. Use Appropriate Tools
Performance Testing Tools: Utilize appropriate tools such as JMeter, LoadRunner, and Gatling.
Monitoring Tools: Use monitoring tools to track performance metrics during testing.
4. Develop Detailed Test Plans
Test Scenarios: Develop detailed test scenarios covering various load conditions.
Test Data: Prepare realistic test data to simulate actual usage.
5. Execute Tests Thoroughly
Multiple Runs: Execute performance tests multiple times to ensure consistent results.
Monitor Metrics: Continuously monitor performance metrics during test execution.
6. Analyze Results
Identify Bottlenecks: Analyze test results to identify performance bottlenecks.
Optimize Performance: Implement optimizations based on test results to improve performance.
7. Continuous Improvement
Iterative Testing: Conduct performance testing iteratively to continuously improve performance.
Update Tests: Regularly update performance tests to reflect changes in the application.
Tools for Performance Testing
Several tools are available for performance testing, each offering unique features and capabilities.
JMeter
Features: Open-source tool, supports load and performance testing, extensive reporting.
Use Cases: Load testing, stress testing, spike testing.
LoadRunner
Features: Comprehensive performance testing tool, supports a wide range of protocols, detailed analysis.
Use Cases: Load testing, endurance testing, scalability testing.
Gatling
Features: Open-source tool, high-performance testing, real-time monitoring.
Use Cases: Load testing, stress testing, performance testing.
Neoload
Features: Continuous testing, integrates with CI/CD pipelines, detailed analysis.
Use Cases: Load testing, scalability testing, performance testing.
BlazeMeter
Features: Cloud-based testing, integrates with JMeter, real-time reporting.
Use Cases: Load testing, stress testing, performance testing.
AppDynamics
Features: Application performance monitoring, real-time visibility, detailed diagnostics.
Use Cases: Performance monitoring, bottleneck identification, optimization.
Dynatrace
Features: Full-stack monitoring, AI-powered insights, automatic root cause analysis.
Use Cases: Performance monitoring, anomaly detection, optimization.
Conclusion
Performance testing is an essential aspect of software development, ensuring that applications are stable, responsive, and scalable under various conditions. By understanding the different types of performance testing and following best practices, organizations can identify and resolve performance issues before they impact users. Utilizing the right tools and continuously improving the testing process will help deliver high-quality applications that meet user expectations and perform optimally in production environments.
| testscenario |
1,878,868 | Changing User Preferences: From Facebook to Cryptocurrencies | In today’s digital world, changes are happening extremely fast. Yesterday, everyone was interested in... | 0 | 2024-06-06T07:14:25 | https://36crypto.com/changing-user-preferences-from-facebook-to-cryptocurrencies/ | cryptocurrency, news |
In today’s digital world, changes are happening extremely fast. Yesterday, everyone was interested in Instagram and Facebook, and today they are giving way to crypto wallets. So what is behind this phenomenon?
**Phantom Wallet surpassed Facebook and ChatGPT in popularity**
Phantom Wallet is a self-custodial crypto wallet originally developed to hold only SOL but later expanded to support BTC, ETH, and MATIC. Recently, according to [Appfigures](https://appfigures.com/top-apps/google-play/united-states/top-apps), it was ranked 11th in the free downloads ranking after Cash App and Snapchat and had approximately 770,000 downloads in April, ahead of social media giant Facebook and OpenAI’s ChatGPT language model.
This is not the first time that the wallet has been in the news because it has risen in the ratings of app stores. On May 19, Phantom also took 3rd place in the Apple App Store utility category, right after Google and Google Chrome. In addition, the company [reported](https://x.com/phantom/status/1784910607415714047) that more than 7 million active monthly users were recorded in April. This is often interpreted by the cryptocurrency community as a sign of the growing popularity of cryptocurrencies.
The wallet’s growing popularity coincided with the news that the company has acquired Bitski, an extension for the web3 browser, amid demand for intuitive decentralized applications. Phantom plans to integrate the extension to simplify connectivity and improve the user experience. With Bitski, users will be able to create wallets using only an email address, eliminating the need to manage passphrases and private keys. In addition, the extension allows developers to embed the wallet function directly into their applications, allowing users to interact with them without leaving the program.
**MetaMask plans to integrate Bitcoin**
The popular cryptocurrency wallet MetaMask is planning to add support for Bitcoin. This is [reported](https://www.coindesk.com/business/2024/05/22/bitcoin-is-coming-to-ethereum-stalwart-metamask-sources/) by CoinDesk, citing people familiar with the matter. The wallet provider plans to introduce Bitcoin support within the next month, but the exact time is unknown. The specific functionality of the cryptocurrency has not yet been determined, but the possibilities may be initially limited but later expanded.
Even though MetaMask has already gone beyond the Ethereum ecosystem with the inclusion of Snaps, such a move will add one of the leading blockchains to the most popular digital wallet platforms. Recently, the wallet’s developers have added other features to improve the user experience, such as Blockaid-based security alerts for multiple blockchains, Ethereum validator staking, and a feature that allows users to verify their eligibility to receive airdrop and NFT claims.
MetaMask’s Ethereum wallet is the gateway for more than 30 million monthly active users to the world of decentralized applications and non-fungible tokens (NFTs) on Web3. It integrates with exchanges such as Binance, WhiteBIT, and OKX and allows users to top up their balance with ETH tokens and related networks.
While MetaMask is working on integrating BTC support, Cardano founder Charles Hoskinson has [expressed](https://x.com/Cointelegraph/status/1793640683091423373) a provocative vision. He argues that the crypto industry must evolve beyond Bitcoin to remain relevant and sustainable. Hoskinson notes that Bitcoin, with its proof-of-work consensus mechanism, is no longer in line with the technological advances needed to meet current needs for scalability and sustainability. He compares the commitment to a digital asset to a form of “religion”.
**Summary**
The popularity of Phantom Wallet, which surpasses the major social media giants, shows that cryptocurrencies are becoming more accessible and understandable to the world. MetaMask and its Bitcoin extension open up new opportunities for users to integrate different digital assets in one place. These moves demonstrate the importance of developing the cryptocurrency ecosystem and show how popular wallets are actively adapting to market needs. | hryniv_vlad |
1,878,867 | All You Need to Know About Coupa R39 Release | As a top provider of Cloud-based business expenditure management solutions, Coupa is no exception to... | 0 | 2024-06-06T07:12:55 | https://digitalxfuture.com/all-you-need-to-know-about-coupa-r39-release/ | coupa, release | 
As a top provider of Cloud-based business expenditure management solutions, Coupa is no exception to the rule that the enterprise software industry is always changing. Businesses all throughout the world are looking forward to the new features and improvements that a much-awaited R39 version will offer. If you’re new or an experienced user, getting ready for a Coupa R39 Release is essential to ensuring a smooth transition and making the most of all it has to offer.
1. **Embracing Change: Why Preparation Matters**
Software updates are essential to remaining competitive and fulfilling the ever-changing needs of modern enterprises in the fast-paced digital economy. Updates can create potential issues if they are not properly managed, even though they frequently bring exciting new features. To reduce risks, minimize disruptions, and guarantee a seamless implementation of new features and functionalities, thorough planning is essential.
2. **Understanding the R39 Release**
Numerous platform improvements are anticipated with the upcoming Coupa R39 update, including tighter third-party system integration, greater analytics and reporting, better user experience, expedited procurement procedures, and increased mobile functionality. It is essential that you get familiar with these changes in order to properly align your preparation efforts and prioritize the areas that are most pertinent to the requirements of your firm. The first step to a successful implementation of R39 is understanding its scope and potential impact.
3. **Assessing Organizational Readiness**
A thorough evaluation of organizational preparedness is essential to an effective R39 implementation. Key topics including technological infrastructure capabilities, any effects on current business processes and workflows, user training requirements for a seamless adoption and transition, and data management procedures to guarantee clean and suitable data should all be included in this study. Identifying the necessary adjustments and ensuring operational efficiency throughout the update can be achieved by thoroughly evaluating these areas.
4. **Leveraging Test Automation**
Putting in place a strong test automation plan is a great way to get ready for the R39 release. It expedites testing, guarantees comprehensive coverage, lowers mistake rates, and enhances quality control. Important actions include determining which processes are crucial, creating thorough test scripts, utilizing dependable automation solutions that complement your tech stack, and adopting an automated testing mindset by integrating testing into development cycles. By taking a proactive stance, problems are found and fixed early on, reducing interruptions to the actual release.
5. **Stakeholder Engagement and Communication**
Successful R39 preparation requires effective communication and a stakeholder engagement. A cross-functional project team must be formed, a thorough communication plan must be created, open collaboration must be fostered through debates and feedback, and extensive training and support materials must be made available. Including stakeholders from other departments, such as IT, finance, procurement, and end users, guarantees that different viewpoints are taken into account and that a cooperative approach is adopted, resulting in a common understanding and support from all parties.
**Conclusion**
Preparing for a Coupa’s R39 release is a multifaceted endeavor that requires careful planning, and a collaboration, along with a proactive approach. Companies can get ahead of Coupa’s R39 release with Opkey’s leading test automation platform. As an official Coupa partner, Opkey empowers enterprises to seamlessly navigate major updates like R39. Their no-code solution enables both business and IT teams to create self-healing test scripts effortlessly through a visual, drag-and-drop interface – no coding expertise required. The teams can accelerate testing, ensure thorough coverage, and maximize ROI with Opkey’s robust reporting and analytics. Don’t get caught unprepared. Request Opkey’s in-depth R39 Advisory Document today and experience the most efficient Coupa release cycle yet with automated testing from Opkey.
| rohitbhandari102 |
1,878,866 | Top 10 Developer Communities You Should Explore | Top 10 Developer Communities You Should Explore In today's rapidly evolving tech... | 0 | 2024-06-06T07:12:46 | https://dev.to/sh20raj/top-10-developer-communities-you-should-explore-4aa8 | webdev, javascript, beginners, programming | # Top 10 Developer Communities You Should Explore
In today's rapidly evolving tech landscape, staying updated and connected is crucial for developers. One of the best ways to do this is by joining developer communities. These communities offer support, knowledge sharing, and networking opportunities that can be invaluable for both budding and experienced developers. Here’s a look at the top 10 developer communities you should explore:
## 1. Stack Overflow
### Overview:
Stack Overflow is one of the largest and most popular online communities for developers. It’s a question-and-answer site where developers can ask questions, share knowledge, and learn from each other.
### Why Join?
- **Vast Knowledge Base:** Millions of questions and answers across various programming topics.
- **Active Community:** Highly active with quick responses to questions.
- **Reputation System:** Earn points and badges for your contributions, which can enhance your credibility.
## 2. GitHub
### Overview:
GitHub is a platform for version control and collaboration. It’s also a hub for millions of developers to host and review code, manage projects, and build software together.
### Why Join?
- **Collaboration:** Work on projects with developers worldwide.
- **Open Source Projects:** Discover and contribute to open source projects.
- **GitHub Discussions:** Engage in discussions about projects and technologies.
## 3. Reddit (r/programming, r/learnprogramming)
### Overview:
Reddit hosts numerous subreddits dedicated to programming, where developers can discuss news, share resources, and seek advice.
### Why Join?
- **Diverse Topics:** Subreddits for nearly every programming language and framework.
- **Community Engagement:** Upvote, comment, and engage in discussions.
- **Learning Resources:** Access to tutorials, courses, and study materials.
## 4. Hacker News
### Overview:
Hacker News, run by Y Combinator, is a social news website focusing on computer science and entrepreneurship. It’s a place for developers to share and discuss the latest tech news and developments.
### Why Join?
- **Current News:** Stay updated with the latest trends and news in tech.
- **Discussions:** Engage in meaningful discussions about technology and startups.
- **Networking:** Connect with other tech enthusiasts and professionals.
## 5. Dev.to
### Overview:
Dev.to is a community where developers share articles, tutorials, and discuss various aspects of software development.
### Why Join?
- **Content Creation:** Write and share your own articles and tutorials.
- **Supportive Community:** Friendly and inclusive environment for all developers.
- **Variety of Topics:** Covers a wide range of programming languages and frameworks.
## 6. FreeCodeCamp
### Overview:
FreeCodeCamp is an interactive learning platform that offers free coding lessons. It also has a vibrant community forum where learners and developers can interact.
### Why Join?
- **Learning Resources:** Access to free coding lessons and projects.
- **Community Support:** Get help and support from fellow learners and experienced developers.
- **Networking:** Connect with others on a similar learning journey.
## 7. Hashnode
### Overview:
Hashnode is a blogging platform designed specifically for developers. It’s a place to write and share your tech articles, connect with other developers, and grow your readership.
### Why Join?
- **Developer-focused Blogging:** Tailored tools for writing and sharing tech content.
- **Community Interaction:** Engage with readers and other writers.
- **Growth Opportunities:** Build a following and establish your online presence.
## 8. DZone
### Overview:
DZone is a knowledge-sharing platform for software professionals. It offers articles, tutorials, and tools across various tech topics.
### Why Join?
- **Expert Content:** Access to high-quality articles and tutorials from industry experts.
- **Wide Range of Topics:** Covers many programming languages, frameworks, and best practices.
- **Contributor Opportunities:** Write and share your own articles.
## 9. Discord Developer Communities
### Overview:
Discord hosts numerous developer communities where members can chat in real-time about various programming topics.
### Why Join?
- **Real-time Communication:** Instant messaging and voice chat capabilities.
- **Specialized Servers:** Join servers dedicated to specific programming languages or technologies.
- **Community Events:** Participate in coding challenges, hackathons, and other events.
## 10. Meetup
### Overview:
Meetup is a platform for finding and building local communities. It’s widely used for organizing in-person and virtual meetups related to software development.
### Why Join?
- **Local Networking:** Connect with local developers and tech enthusiasts.
- **Events and Workshops:** Attend or organize meetups, workshops, and hackathons.
- **Learning Opportunities:** Gain knowledge from speakers and peers.
## Conclusion
Joining a developer community is an excellent way to enhance your skills, stay updated with industry trends, and connect with like-minded individuals. Whether you prefer engaging in discussions, contributing to open-source projects, or attending meetups, there’s a community out there for you. Explore these top 10 developer communities and find the ones that best suit your interests and goals. | sh20raj |
1,878,864 | Glam Up My Markup: Beaches - Frontend Challenge v24.04.17 | This is a submission for [Frontend Challenge... | 0 | 2024-06-06T07:11:52 | https://dev.to/abhi-g/glam-up-my-markup-beaches-frontend-challenge-v240417-3kgh | devchallenge, frontendchallenge, css, javascript | _This is a submission for [Frontend Challenge v24.04.17]((https://dev.to/challenges/frontend-2024-05-29), Glam Up My Markup: Beaches_
## What I Built
I used the power of images. Images are very much the core of any travel or place showcase projects. Hence I embedded images and used CSS and simple JS to glamorously enhance the looks to match what I wanted to achieve.
## Demo
Access my project on [Stackblitz](https://stackblitz.com/~/github.com/abgaonkar/dev.to-frontend-2024-05-29)
And I encourage to view it on full-screen 16:9 ratio, since it's not mobile friendly.
## Journey
I am a NextJS developer. Yet this was fun to do since, it gets to the basics of manipulating HTML with JS using DOMs. Looking forward to the next challenge :)
Thank you. | abhi-g |
1,878,862 | Financial Due Diligence | Your gateway to going public, Databoss Inc. specializes in IPOs, SPACs, M&A, and private... | 0 | 2024-06-06T07:10:51 | https://dev.to/databoss/financial-due-diligence-4f3f | Your gateway to going public, Databoss Inc. specializes in IPOs, SPACs, M&A, and private placements in the U.S. financial markets. We offer expert strategy consulting, market research, and investor relations with a 100% success rate.
visit my website:http://www.databossinc.com/ | databoss | |
1,878,861 | Tape Trends: Exploring the Future of Masking Solutions | What Precisely Tape Styles Tape designs are revolutionary plus brand name practices being latest... | 0 | 2024-06-06T07:10:18 | https://dev.to/ronald_woodgo_ba03f686524/tape-trends-exploring-the-future-of-masking-solutions-2166 | design |
What Precisely Tape Styles
Tape designs are revolutionary plus brand name practices being latest tape that is utilizing solve difficulty. Within the previous couple of years, people have become tape that was using various applications, from sticking strategies together to areas which are masking. Masking solutions, in particular, are becoming more and more popular in to the many years which can be past is few. Masking tape is just a as form of automotive adhesive tape that will be utilized mainly for artwork, to shield areas that are specific paint. The tape is made to eliminate effectively minus damaging the liner which was external, we'll being looking into the ongoing future of masking solutions as well as the a few importance of using tape in a variety of applications.
Subtitle: Features Of Utilizing Tape
Using tape has value that are a few. First, you'll be able to use. People, regardless of ages since degree of experience, can merely make use of tape to their desired region, tape is definitely an solution that was low difficulty that is priced is more. When compared with additional adhesives, tape test reasonably affordable. There is no need to divide the financial institution to find out an effective way to fix their masking since specifications which may be sticking.
An perks which are extra is significant of tape is safety. Unlike additional adhesives, tape test safer plus non-toxic to make use of. This could feel especially important in households plus people which can be younger pets. Tape does not produce fumes because cause issues for the environmental surroundings which can be ecological. Using tape is a safer plus solution that was dependable your sticking which are whole plus specs.
Subtitle: Innovation in Tape Possibility
Tape techniques need really proceeded to evolve plus new innovations available on the market. Need, for example, the growth of multi-surface tape. This tape could be applied to areas concrete, rock, along with lumber. It is actually built to follow any region, producing application smoother plus much more efficient. The shipping tape may be developed to additionally feeling weather-resistant, that makes it ideal for outside applications.
You will find tapes that are clear can be employed instead of glue because additional adhesives. Clear tape is great for utilized in arts plus crafts and that may be used to laminate papers plus shield them from damage. It is an solution which try excellent you need the application that was waterproof.
Subtitle: Just How To Render Use Of Tape
Using tape for decorating take to effortless. First, recognize the utmost effective you should utilize the tape to. Wash the liner which was outer be sure there is absolutely no dust since debris that could influence the tape's adhesive properties.
Next, apply the tape to the specific region, ensuring it is actually firmly create. If you want to cut the tape to their desired size, also use scissors or perhaps a blade to generate a cut that are clean.
Once the tape come in put, usage force to ensure the sticks and this can be adhesive the liner which was exterior. It is flush upwards contrary to the region that is specific could be painting if you utilize masking tape, vow.
To eliminate the tape, peel it well very carefully the very best. In case tape is reluctant in the future that is foreseeable down, start using a hairdryer for the heat that are reduced to warm the tape, which makes it better to eradicate.
Subtitle: Quality of Tape
In relation to tape quality, just a tapes which can be few made equal. Different tapes has adhesive that is significantly diffent plus properties. It is critical to find the tape that was fit for function.
For example, going for the tape that has been intended to peel through the lime effectively minus damaging the most truly effective underneath if you utilize tape that has been masking make certain. Likewise, in the event that tape was desired by your that was weather-resistant, decide on a tape which will withstand environment that has been extreme.
Whenever tape that was choosing additionally it is important on compared to that you see the region you might be placing it. Different areas might necessitate filament tape which will be considerably diffent, adhesive energy plus weather opposition.
Subtitle: Application of Tape
Tape has applications being countless from masking areas during artwork to actions which are sticking. Check out methods try use tape which try revolutionary
1. Generate wall surface area art with the use of tape to build types that are unique designs concerning the wall surface area.
2. use tape to label services and products throughout the residence which are homely room containers plus compartments.
3. use tape to hold cables plus cables arranged.
4. utilize tape to produce a pattern that has been documents which are grid significantly help plus drawing as producing.
The options try endless in relation to tape applications.
To sum up, tape products can be a versatile plus solution which can be problems that are really untapped are wide ranging. Their affordability, ease of use, plus security help it become perfect for different applications. The continuing future of tape techniques seems bright, plus tape which was revolutionary plus merchandise striking the market usually. With a imagination that are little tape might solve almost any pressing problems it's likely you have. | ronald_woodgo_ba03f686524 |
1,878,860 | Pentagon Games is Launching a Dedicated Pentagon Chain leveraging Zeeve’s Comprehensive RaaS Offering | Pentagon Games, an innovative video game publishing & distribution platform powered with XR... | 0 | 2024-06-06T07:08:44 | https://dev.to/zeeve/pentagon-games-is-launching-a-dedicated-pentagon-chain-leveraging-zeeves-comprehensive-raas-offering-2in7 | announcement, pentagongaming, zeeve | <p>Pentagon Games, an innovative video game publishing & distribution platform powered with XR Metaverse, AI, and Web3 for empowering GameFi adoption, is set to launch a custom, gaming-focused Pentagon chain (CDK ZKEVM) leveraging Zeeve’s comprehensive CDK-specific RaaS stack offering. </p>
<p><a href="https://pentagon.games/">Pentagon Games</a> originally chose to utilize a public chain, as its focus centered around unlocking new ways of game development through futuristic technologies like AI, Web3, and AR/VR, further pushing the boundaries of advancement in gameFi. Now that the platform is growing tremendously with 7+ years of web3 gaming experience, 10+ game titles, and more than 1.2 million global users– Pentagon Games is transitioning to an application-specific, standalone chain to achieve higher scalability, enhanced modularity, atomic inter-chain transactions, and robust security arrangements. </p>
<p>The decision to launch the Pentagon chain comes from Pentagon games’ vision to tap into CDK’s modularity, EVM compatibility and novel features like independent data availability, near-instant block finality, plus cutting-edge security. A standalone chain will allow Pentagon games to meet the diverse needs of their platform and meanwhile govern the ecosystem for a more adaptable player's perception and interactions. As a part of their action plan, Pentagon Games will release their own native token; $PEN, UE5 cross reality metaverse, as well as a mature game launchpad to empower a futuristic gaming infrastructure to scale mass adoption amid rising competition. Players, developers, and game studios will leverage the upcoming Pentagon chain to capture higher value by deploying unique web3 games, and most importantly be able to interact across an aggregated ecosystem of many such games running on the chain.</p>
<p>To ensure a streamlined and complexity-free launch of the Pentagon chain, their team will utilize Zeeve’s comprehensive rollups-as–a-service (RaaS) stack offering. As an official implementation partner for CDK, Zeeve has expertise in working closely with the CDK team to provide quality rollup services to all its clients. Speaking about Pentagon Games, they will benefit from core CDK infrastructure offerings such as a quick, automated infrastructure setup, end-to-end infra management for reliable performance, 24/7 enterprise SLA, 99.9% uptime guarantee, and full compliance for ISO, SOC 2 Type II, and GDPR standards. Further, <a href="https://www.zeeve.io/">Zeeve</a> will enable modularity into the Pentagon chain with 30+ third-party integration services spanning off-chain DA layers, provers, account abstraction, wallets, and more. Zeeve is also assisting Pentagon Games to use a hybrid decentralized sequencer; Cero, alongside essential blockchain components like native bridge, testnet faucet, etc. </p>
<p><em>“It’s exciting to be teaming up with Pentagon Games. As their official RaaS provider, Zeeve allows Pentagon Games to be entirely focused on catering a solid ecosystem for top-level immersive games while we ensure a seamless launch, management, and timely scaling of the Pentagon chain’s infrastructure. With us, Pentagon Games envisions to utilize CDK’s zero-knowledge proof-based security, massive scalability, and easy modularity as their bedrock to accomplish their mission of revamping the video game industry entirely.” </em></p>
<p>Ravi Chamria</p>
<p>Co-founder and CEO at Zeeve</p>
<p><em>"The team at Pentagon Games is thrilled to have reached this stage in our development, collaborating with Zeeve to build critical infrastructure that will power the next generation of experiences in Web3 gaming." </em></p>
<p>Idon Liu</p>
<p>Co-founder of Pentagon Games</p>
<p>The Pentagon chain’ testnet is expected to go live in June 2024, and mainnet in Sept 2024. The Pentagon games team is currently dedicated to the successful execution of this project. From launch to infrastructure management and further upgradation, <a href="https://www.zeeve.io/">Zeeve</a> will be a reliable RaaS provider for the Pentagon to perform all the operations without hassle. Zeeve’s highly-optimized RaaS infrastructure, blockchain experts, and proven track of deploying/managing L2 rollups for a range of enterprises, including 30,000+ users and 40+ industry partners, makes Zeeve RaaS a trusted <a href="https://www.zeeve.io/rollups/">rollup infrastructure provider</a> and a valuable contributor in the rapidly evolving web3 ecosystem.</p> | zeeve |
1,878,859 | How to Play and Win on 3 Patti Room APK? | **Introduction Teen Patti, also known as Indian Poker, is a popular card game that can be played on... | 0 | 2024-06-06T07:07:26 | https://dev.to/sultan_khan_a412f27a485c3/how-to-play-and-win-on-3-patti-room-apk-4el0 | **Introduction
Teen Patti, also known as Indian Poker, is a popular card game that can be played on various platforms, including the [3 Patti Room APK Pakistan Latest Version Android 2024](https://3pattiroomapk.pk/). Here are some tips on how to play and improve your chances of winning:
## How to Play Teen Patti
## Understand the Basic Rules:
Teen Patti is usually played with a standard 52-card deck without jokers.
Each player is dealt three cards face down.
The goal is to have the best three-card hand and to maximize the pot before the showdown.
## Hand Rankings (From Highest to Lowest):
Trail (Set/Trio): Three cards of the same rank.
Pure Sequence (Straight Flush): Three consecutive cards of the same suit.
Sequence (Straight): Three consecutive cards not of the same suit.
Color (Flush): Three cards of the same suit, not in sequence.
Pair (Double): Two cards of the same rank.
High Card: When none of the above combinations are made, the highest card plays.
## Gameplay:
Players place an initial bet (boot amount) to form the pot.
Players take turns to bet, raise, or fold.
Betting continues until all but one player folds or when the betting ends, and a showdown occurs.
## Tips to Win at Teen Patti
Know When to Play Blind:
Playing blind (not looking at your cards) can add an element of unpredictability to your game. However, it's essential to read the table and judge the right moments to play blind.
Observe Other Players:
Pay close attention to the behavior and betting patterns of other players. This can give you insights into their strategies and the strength of their hands.
Control Your Emotions:
Stay calm and composed, regardless of whether you have a good or bad hand. Emotional decisions often lead to mistakes.
Bluff Wisely:
Bluffing is a crucial part of Teen Patti. Use it to your advantage, but don't overdo it. Bluff selectively and be aware of when others might be bluffing.
Manage Your Bankroll:
Set a budget for how much you are willing to spend and stick to it. Avoid chasing losses and betting recklessly.
Practice Makes Perfect:
The more you play, the better you'll get at understanding the game and developing strategies. Practice with free games before playing with real money.
Know When to Fold:
Don’t be afraid to fold if you have a weak hand. It's better to save your chips for a stronger hand than to lose them on a weak one.
By understanding the rules, observing your opponents, and using strategic betting, you can increase your chances of winning in Teen Patti. Happy playing! | sultan_khan_a412f27a485c3 | |
1,878,858 | Puravive Weight Loss Supplement. | Introduction Achieving and maintaining a healthy weight is a challenge many people face. With busy... | 0 | 2024-06-06T07:05:55 | https://dev.to/vinay_saini_6970101da4907/puravive-weight-loss-supplement-1a3g | healthydebate | Introduction
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[Read more ….](https://www.getpuravives.com/)
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Garcinia Cambogia:
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Green Tea Extract:
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Caffeine Anhydrous:
A potent form of caffeine, this ingredient helps increase alertness and energy levels, making it easier to stay active and burn more calories.
Glucomannan:
A dietary fiber extracted from the konjac plant, Glucomannan expands in the stomach to create a feeling of fullness, helping to reduce overall calorie intake.
Raspberry Ketones:
These compounds found in raspberries are thought to help break down fat and increase levels of adiponectin, a hormone that regulates metabolism.
Chromium Picolinate:
This mineral helps regulate blood sugar levels and reduces cravings for carbohydrates, making it easier to stick to a healthy eating plan.
How Does Puravive Work?
[Puravive](https://www.getpuravives.com/) supports weight loss through a multifaceted approach:
Boosting Metabolism:
Ingredients like green tea extract and caffeine anhydrous increase the body’s metabolic rate, allowing for more calories to be burned even at rest.
Suppressing Appetite:
Garcinia Cambogia and Glucomannan help control hunger and reduce overall food intake, making it easier to maintain a calorie deficit.
Enhancing Energy Levels:
The caffeine in Puravive provides an energy boost, which can enhance exercise performance and overall activity levels.
Promoting Fat Breakdown:
Raspberry ketones and green tea extract aid in the breakdown of fat, which can help reduce body fat percentage over time.
Regulating Blood Sugar Levels:
Chromium picolinate helps stabilize blood sugar levels, which can reduce cravings for unhealthy foods and prevent energy crashes.
Benefits of Puravive
Puravive offers several benefits for those seeking to lose weight:
Natural Ingredients:
Puravive is made from natural ingredients that are generally safe and effective.
Increased Metabolism:
By boosting metabolism, Puravive helps burn more calories throughout the day.
Appetite Control:
Ingredients that reduce hunger can make it easier to stick to a healthy diet.
Enhanced Energy:
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Improved Fat Burning:
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Blood Sugar Regulation:
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How to Use Puravive
To get the best results from Puravive, follow these guidelines:
Dosage:
The typical dosage is one or two capsules per day, taken with a glass of water before meals.
Timing:
Taking the supplement before meals can maximize its appetite-suppressing effects.
Hydration:
Drink plenty of water while using Puravive, especially because Glucomannan requires adequate hydration to expand in the stomach.
Diet and Exercise:
For optimal results, combine Puravive with a balanced diet and regular physical activity.
Order Now :- Puravive supplement
Potential Side Effects
While Puravive is generally considered safe due to its natural ingredients, some individuals may experience side effects:
Caffeine Sensitivity:
Those sensitive to caffeine might experience jitteriness, insomnia, or an increased heart rate. It’s advisable to limit other sources of caffeine while taking Puravive.
Digestive Issues:
Glucomannan can cause bloating, gas, or diarrhea in some individuals, particularly if not taken with enough water.
Allergic Reactions:
Check the ingredient list to ensure you aren’t allergic to any components. Consult a healthcare provider if you have any known allergies.
Medication Interactions:
Some ingredients might interact with medications, such as blood thinners or diabetes medications. It’s important to talk to a healthcare provider before starting any new supplement.
Customer Reviews and Testimonials
Many users have shared positive experiences with Puravive, noting significant weight loss and other health benefits. Here are a few examples:
John D.: "I was skeptical at first, but after using Puravive for three months, I've lost 20 pounds. My energy levels are higher, and I don't feel as hungry throughout the day."
Sarah M.: "Puravive has been a game-changer for me. I've struggled with weight loss for years, but this supplement has helped me shed those stubborn pounds without feeling deprived."
Emily R.: "I love that Puravive uses natural ingredients. I've lost 15 pounds in two months and feel more energetic and focused."
Scientific Evidence
The ingredients in Puravive are supported by scientific research:
Garcinia Cambogia:
Studies show that HCA, the active ingredient, can reduce appetite and inhibit fat production. A review in the Journal of Obesity found Garcinia Cambogia can lead to short-term weight loss.
Green Tea Extract:
Research indicates green tea extract boosts metabolism and fat oxidation. A study in the American Journal of Clinical Nutrition found it significantly increased energy expenditure and fat burning.
Caffeine Anhydrous:
Caffeine has been shown to enhance physical performance and promote fat loss. A review in the International Journal of Obesity associated caffeine intake with weight loss and fat reduction.
Glucomannan:
A systematic review in the American Journal of Clinical Nutrition concluded that Glucomannan could significantly reduce body weight in overweight and obese individuals.
Raspberry Ketones:
Animal studies suggest raspberry ketones can increase fat breakdown and reduce body weight, though more human research is needed.
Chromium Picolinate:
Studies show chromium picolinate helps regulate blood sugar and reduce food intake, promoting weight loss. A review in the Journal of Clinical Pharmacology supports these findings.
Tips for Maximizing Results with Puravive
To get the most out of Puravive, consider these tips:
Maintain a Healthy Diet:
Focus on a balanced diet rich in whole foods, such as fruits, vegetables, lean proteins, and whole grains. Avoid processed foods and sugary snacks.
Stay Active:
Incorporate regular physical activity into your routine. Aim for at least 150 minutes of moderate-intensity exercise or 75 minutes of vigorous-intensity exercise per week.
Stay Hydrated:
Drink plenty of water throughout the day to support overall health and enhance the effectiveness of Puravive.
Get Enough Sleep:
Aim for 7-9 hours of quality sleep each night. Poor sleep can negatively impact weight loss and overall health.
Monitor Progress:
Keep track of your weight loss progress by recording your weight, measurements, and how you feel. This can help you stay motivated and make necessary adjustments to your routine.
Consult a Healthcare Provider:
Before starting any new supplement, it’s always a good idea to consult with a healthcare provider, especially if you have any underlying health conditions or are taking medications.
Conclusion
Puravive is a weight loss supplement designed to support healthy weight management through a blend of natural ingredients. By boosting metabolism, suppressing appetite, enhancing energy levels, and promoting fat oxidation,[ Puravive](https://www.getpuravives.com/) offers a comprehensive approach to weight loss. While individual results may vary, the positive reviews and scientific evidence supporting its ingredients suggest that Puravive can be an effective tool for those looking to lose weight and improve their overall health. As with any supplement, it’s important to use Puravive as directed, maintain a healthy lifestyle, and consult with a healthcare provider to ensure it’s the right choice for your weight loss journey.
| vinay_saini_6970101da4907 |
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1,878,855 | New post | Hello I'm New here | 0 | 2024-06-06T07:01:32 | https://dev.to/kunalkumar/new-post-2aee | webdev, javascript, beginners, programming |
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1,863,018 | Best SQL Server Clients for Mac: Simplify Your Database Management | Managing SQL Server on macOS can be challenging due to its Windows-centric tools. This article... | 21,681 | 2024-06-06T07:00:00 | https://dev.to/dbvismarketing/best-sql-server-clients-for-mac-simplify-your-database-management-3h2m | sqlserver |
Managing SQL Server on macOS can be challenging due to its Windows-centric tools. This article explores the best SQL Server clients for Mac, providing essential features and tips for efficient database management.
## Top SQL Server Clients for Mac
### DbVisualizer
DbVisualizer supports over 40 SQL Server object types, has a responsive UI, and handles large datasets efficiently. It's available in both Free and Pro versions, making it a top choice for macOS users.
### HeidiSQL
HeidiSQL is lightweight and perfect for hobbyists. It's free, easy to use, and suitable for small database projects.
### SQLiteOnline
For quick, non-sensitive data edits, SQLiteOnline is ideal. This web-based solution supports multiple databases, including SQL Server, and is accessible from your browser.
## FAQs
**Why isn't SSMS available for macOS?**
SSMS is developed for Windows. Mac users need alternatives like DbVisualizer for similar capabilities.
**Can I connect to SQL Server from a Mac?**
Yes, clients like DbVisualizer allow you to connect and manage SQL Server databases from a Mac.
**Are there free SQL Server clients for Mac that offer robust features?**
DbVisualizer Free offers comprehensive features and a trial of the Pro version without registration.
**How do I ensure my data is secure when using an SQL Server client on Mac?**
Choose clients with encrypted connections and secure authentication methods, and keep software updated for security.
## Conclusion
The right SQL Server client can enhance your database management on Mac. DbVisualizer is a top choice, offering comprehensive features and ease of use. Please read more in the article [SQL Server for Mac: The Ultimate Guide to the Best SQL Server Client.](https://www.dbvis.com/thetable/sql-server-for-mac-the-ultimate-guide-to-the-best-sql-server-client/) | dbvismarketing |
1,878,853 | Cat Tunnel Tree Skirt | Cats, with their curious nature and love for exploration, often seek out cozy hideaways and... | 0 | 2024-06-06T06:58:35 | https://dev.to/asafranco/cat-tunnel-tree-skirt-44mb | cat, tunnel, skirt, catskirt | Cats, with their curious nature and love for exploration, often seek out cozy hideaways and intriguing spaces to satisfy their natural instincts. The cat tunnel tree skirt emerges as a delightful solution, offering feline companions an enticing haven within the confines of a familiar household item.
**Understanding the Cat Tunnel Tree Skirt**
The cat tunnel tree skirt combines the functionality of a traditional Christmas tree skirt with the added feature of an integrated tunnel system designed specifically for cats. Crafted from soft, durable materials such as fleece or plush fabric, it provides a comfortable surface for cats to lounge upon while also serving as a playful retreat.
**Design and Features**
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**Encouraging Physical Activity**
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**Providing Mental Stimulation**
In addition to physical exercise, the cat tunnel tree skirt provides valuable mental stimulation for cats. The enclosed space offers opportunities for sensory exploration, encouraging cats to use their senses of sight, smell, and touch to navigate their surroundings. This mental engagement is essential for preventing boredom and promoting cognitive health.
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1,878,839 | Best Practices for Building Microservices with NestJS | Microservices architecture has become a popular approach for developing scalable and maintainable... | 0 | 2024-06-06T06:57:49 | https://dev.to/ezilemdodana/best-practices-for-building-microservices-with-nestjs-p3e | nestjs, typescript, microservices, backend | Microservices architecture has become a popular approach for developing scalable and maintainable applications. NestJS, a progressive Node.js framework, offers robust support for building microservices with its modular architecture and powerful features. In this article, we'll explore best practices for building microservices with NestJS, providing clear details and examples to help you implement these practices effectively.
**1. Design Microservices with a Clear Domain**
**Best Practice**
Start by defining the boundaries of each microservice based on the business domains. Each microservice should have a single responsibility and encapsulate a specific business capability.
**Example**
Suppose we are building an e-commerce platform. We can define the following microservices:
**User Service**: Handles user authentication, registration, and profile management.
**Product Service**: Manages product listings, inventory, and pricing.
**Order Service**: Processes customer orders and handles payment transactions.
By designing microservices around specific business domains, we ensure better scalability and maintainability.
**2. Use a Consistent Communication Protocol**
**Best Practice**
Choose a consistent communication protocol for inter-service communication. Common protocols include HTTP, [gRPC](https://grpc.io/), and message brokers like [RabbitMQ](https://www.rabbitmq.com/) or [Kafka](https://kafka.apache.org/). NestJS supports various communication strategies, allowing you to choose the one that best fits your needs.
**Example**
Using RabbitMQ for event-driven communication between microservices:
```
// user.service.ts
import { Controller } from '@nestjs/common';
import { EventPattern } from '@nestjs/microservices';
@Controller()
export class UserService {
@EventPattern('user_created')
handleUserCreated(data: any) {
console.log('User created event received:', data);
// Process the event
}
}
// product.service.ts
import { Controller } from '@nestjs/common';
import { ClientProxy, ClientProxyFactory, Transport } from '@nestjs/microservices';
@Controller()
export class ProductService {
private client: ClientProxy;
constructor() {
this.client = ClientProxyFactory.create({
transport: Transport.RMQ,
options: {
urls: ['amqp://localhost:5672'],
queue: 'product_queue',
},
});
}
createProduct(product: any) {
// Create product logic
this.client.emit('product_created', product);
}
}
```
**3. Implement API Gateways**
**Best Practice**
Use an API gateway to aggregate multiple microservice endpoints into a single entry point. This simplifies client interactions and allows for better management of cross-cutting concerns like authentication, rate limiting, and logging.
**Example**
Creating an API gateway with NestJS:
```
import { Module } from '@nestjs/common';
import { ClientsModule, Transport } from '@nestjs/microservices';
@Module({
imports: [
ClientsModule.register([
{ name: 'USER_SERVICE', transport: Transport.RMQ, options: { urls: ['amqp://localhost:5672'], queue: 'user_queue' } },
{ name: 'PRODUCT_SERVICE', transport: Transport.RMQ, options: { urls: ['amqp://localhost:5672'], queue: 'product_queue' } },
]),
],
})
export class ApiGatewayModule {}
```
**4. Implement Robust Error Handling**
**Best Practice**
Implement consistent and robust error handling mechanisms across all microservices. This includes handling exceptions, retries, and fallback mechanisms.
**Example**
Using an exception filter in NestJS:
```
import { ExceptionFilter, Catch, ArgumentsHost, HttpException } from '@nestjs/common';
@Catch(HttpException)
export class HttpErrorFilter implements ExceptionFilter {
catch(exception: HttpException, host: ArgumentsHost) {
const ctx = host.switchToHttp();
const response = ctx.getResponse();
const status = exception.getStatus();
const errorResponse = {
statusCode: status,
timestamp: new Date().toISOString(),
path: ctx.getRequest().url,
};
response.status(status).json(errorResponse);
}
}
// In your main.ts
import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import { HttpErrorFilter } from './common/filters/http-error.filter';
async function bootstrap() {
const app = await NestFactory.create(AppModule);
app.useGlobalFilters(new HttpErrorFilter());
await app.listen(3000);
}
bootstrap();
```
**5. Secure Microservices**
**Best Practice**
Implement security best practices to protect your microservices. This includes using TLS/SSL, API keys, OAuth, and JWT for authentication and authorization.
**Example**
Securing an endpoint with JWT in NestJS:
// auth.module.ts
```
import { Module } from '@nestjs/common';
import { JwtModule } from '@nestjs/jwt';
import { PassportModule } from '@nestjs/passport';
import { JwtStrategy } from './jwt.strategy';
@Module({
imports: [
PassportModule.register({ defaultStrategy: 'jwt' }),
JwtModule.register({
secret: 'secretKey',
signOptions: { expiresIn: '60s' },
}),
],
providers: [JwtStrategy],
exports: [PassportModule, JwtModule],
})
export class AuthModule {}
// jwt.strategy.ts
import { Injectable } from '@nestjs/common';
import { PassportStrategy } from '@nestjs/passport';
import { ExtractJwt, Strategy } from 'passport-jwt';
@Injectable()
export class JwtStrategy extends PassportStrategy(Strategy) {
constructor() {
super({
jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
secretOrKey: 'secretKey',
});
}
async validate(payload: any) {
return { userId: payload.sub, username: payload.username };
}
}
// In your controller
import { Controller, Get, UseGuards } from '@nestjs/common';
import { AuthGuard } from '@nestjs/passport';
@Controller('protected')
export class ProtectedController {
@Get()
@UseGuards(AuthGuard('jwt'))
getProtectedResource() {
return 'This is a protected resource';
}
}
```
**6. Implement Health Checks and Monitoring**
**Best Practice**
Implement health checks and monitoring to ensure the availability and performance of your microservices. Use tools like [Prometheus](https://prometheus.io/), [Grafana](https://grafana.com/), or NestJS built-in health checks.
**Example**
Adding a health check endpoint in NestJS:
```
import { Module } from '@nestjs/common';
import { TerminusModule } from '@nestjs/terminus';
import { TypeOrmModule } from '@nestjs/typeorm';
import { HealthController } from './health.controller';
@Module({
imports: [TerminusModule, TypeOrmModule.forRoot()],
controllers: [HealthController],
})
export class AppModule {}
// health.controller.ts
import { Controller, Get } from '@nestjs/common';
import { HealthCheck, HealthCheckService, TypeOrmHealthIndicator } from '@nestjs/terminus';
@Controller('health')
export class HealthController {
constructor(
private health: HealthCheckService,
private db: TypeOrmHealthIndicator,
) {}
@Get()
@HealthCheck()
check() {
return this.health.check([
async () => this.db.pingCheck('database'),
]);
}
}
```
**7. Use CI/CD for Continuous Deployment**
**Best Practice**
Implement continuous integration and continuous deployment (CI/CD) pipelines to automate the testing, building, and deployment of your microservices. Use tools like GitHub Actions, Jenkins, or GitLab CI/CD.
**Conclusion**
Building microservices with NestJS offers a powerful and flexible approach to developing scalable and maintainable applications. By following these best practices, you can ensure your microservices are well-designed, secure, and resilient. Embrace the modular architecture of NestJS, leverage its rich ecosystem, and implement robust communication and error-handling strategies to create a successful microservices-based system.
**My way is not the only way!** | ezilemdodana |
1,878,851 | Unlock Mobile Monitoring: zkSync Hyperchain DevNets Now on Zeeve App | We are happy to announce that we have extended the support of the Zeeve mobile app, and now clients... | 0 | 2024-06-06T06:57:38 | https://www.zeeve.io/blog/unlock-mobile-monitoring-zksync-hyperchain-devnets-now-on-zeeve-app/ | announcement, zksynchyperchains, devnets | <p>We are happy to announce that we have extended the support of the Zeeve mobile app, and now clients running their <a href="https://www.zeeve.io/appchains/zksync-hyperchains-zkrollups/">zkSync Hyperchain</a> DevNets on Zeeve RaaS can also view and monitor their networks directly from their Android or iOS app. This enhanced mobile version, while read-only, provides a comprehensive view of analytics, chain configurations, node details, deployed smart contracts, cloud infrastructure, and more. For creating and managing new services, users will continue to use our web-based platforms.</p>
<p><em>"Launching a DevNet and having immediate access to crucial metrics without being tethered to a desktop significantly enhances flexibility for business owners, system administrators, and other key stakeholders</em>. <em>This integration does more than just display data; it powers our clients to oversee their zkSync Hyperchain environments with unmatched ease and agility anytime and anywhere. We are confident this will foster more efficient and scalable blockchain development, enhancing mobile monitoring capabilities that keep you informed and decision-ready, no matter where you are."</em></p>
<p>Dr. Ravi Chamria</p>
<p>Co- founder and CEO of Zeeve</p>
<h2 class="wp-block-heading" id="h-what-s-possible-for-zksync-hyperchains-on-mobile">What’s Possible for zkSync Hyperchains on Mobile?</h2>
<li><strong>zkSync Hyperchain Overview Page: </strong>Click on the <strong>Explorers </strong>button to open L2 Explorer, along with basic zkSync Hyperchain Info, Block height, Health Status (Healthy or Unhealthy), L1 Info, Node Count, Cloud Infra details, alerts and access to docs.</li>
<li><strong>Blockchain Configurations:</strong> To view blockchain configuration, click the Blockchain Config tab on the overview page. On the blockchain configuration<strong> </strong>page, you can view the blockchain configurations<strong>.</strong> Users can also have information<strong> </strong>related to the General Config, Block Config, Transaction Config, and zkSync Hyperchain Env.</li>
<li><strong>Bridge: </strong>To view the bridge, click on the Bridge tab on the overview page. Open the bridge by clicking on the icon next to the bridge URL. This will open the zkSync Hyperchain Bridge page, where you can perform bridge operations.</li>
<li><strong>My Nodes: </strong>To view nodes, click on the <strong>My Nodes</strong> Tab. Users can see the machine status of the nodes (zkSync Hyperchain Nodes, RPC Nodes and Prover Nodes (not available in devnet).</li>
<li><strong>My Wallets: </strong>To view wallet information, click on the <strong>My Wallets</strong> tab on the overview page. You can view the wallets on Explorers by clicking on the links provided against each wallet.</li>
<li><strong>Smart Contracts: </strong>To view smart contracts for both L1 and L2, click on the <strong>Smart Contracts </strong>tab on the overview page. Click on the icon under the <strong>Actions</strong> column to view smart contracts on the Explorer.</li>
<li><strong>Cloud Infra:</strong> Details of Clod, Region, Machine Status, Machine Configurations and Storage.</li>
<li><strong>Analytics:</strong> Advanced tools for tracking the performance and health of blockchain nodes, Servers, logs and alerts.</li>
<h2 class="wp-block-heading" id="h-get-access">Get access</h2>
<p>Download the Zeeve app from the <a href="https://apps.apple.com/us/app/zeeve/id6449033150">Apple App Store</a> or <a href="https://play.google.com/store/apps/details?id=io.zeeve.app">Google Play Store</a>. Log in to your Zeeve account with Google, Apple, GitHub, and your Registered email ID, or sign up in just a few taps. Go to the <a href="https://www.zeeve.io/appchains/zksync-hyperchains-zkrollups/">zkSync Hyperchain</a> section, and your deployed DevNet should be visible there (along with a public Demo network). That's it! </p>
<p>Thank you for choosing <a href="https://www.zeeve.io/">Zeeve</a> as your trusted partner in blockchain infrastructure. We can't wait to see what you'll build next!</p>
| zeeve |
1,878,850 | Shenzhen Yaopeng: Excellence in Metal Product Manufacturing | Shenzhen Yaopeng: Producing the Best Steel Products Shenzhen Yaopeng is actually really a proceeding... | 0 | 2024-06-06T06:57:05 | https://dev.to/ronald_woodgo_ba03f686524/shenzhen-yaopeng-excellence-in-metal-product-manufacturing-5fg3 | design |
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| ronald_woodgo_ba03f686524 |
1,878,849 | Understanding the Software Testing Life Cycle (STLC) | In the realm of software development, ensuring the quality and functionality of a product is... | 0 | 2024-06-06T06:56:43 | https://dev.to/keploy/understanding-the-software-testing-life-cycle-stlc-58p9 | softwaredevelopment, software, testing, ai |
In the realm of software development, ensuring the quality and functionality of a product is paramount. This is where the [Software Testing Life Cycle](https://keploy.io/blog/community/4-ways-to-accelerate-your-software-testing-life-cycle) (STLC) comes into play. The STLC is a systematic process that defines the various stages involved in testing a software product. It encompasses a series of activities conducted methodically to help certify that software meets specified requirements and is free of defects. This article delves into the intricacies of the STLC, elucidating each phase and its significance in delivering a robust software solution.
1. Requirement Analysis
The STLC begins with the Requirement Analysis phase. In this stage, the testing team studies the requirements from a testing perspective to identify testable requirements. If the requirements are not clear or incomplete, the testing team works with stakeholders to clarify any doubts.
• Objective: To identify test requirements and understand the functional and non-functional aspects of the application.
• Activities: Reviewing requirements documents, identifying types of tests to be performed, preparing requirement traceability matrices, and identifying test environment details.
• Outcome: Requirement understanding document and a list of testable requirements.
2. Test Planning
The Test Planning phase is crucial as it defines the strategy and approach for testing the software product. This phase involves the creation of the test plan, which acts as a blueprint for the entire testing process.
• Objective: To develop a comprehensive test plan that outlines the scope, objectives, resources, schedule, and activities for testing.
• Activities: Defining test objectives, determining test scope, estimating resources and time, identifying test environment, and preparing risk management plans.
• Outcome: Test plan document, test estimation document, and resource allocation plan.
3. Test Case Development
In the Test Case Development phase, detailed test cases are created. Test cases are specific conditions or variables under which a tester will determine whether the software satisfies requirements.
• Objective: To develop test cases and test scripts that cover all the functional and non-functional requirements.
• Activities: Creating test cases, preparing test data, reviewing and baselining test cases, and automating test scripts (if applicable).
• Outcome: Test cases, test data, and automated test scripts.
4. Test Environment Setup
The Test Environment Setup phase involves preparing the hardware and software conditions under which a product is tested. This stage can be initiated in parallel with test case development.
• Objective: To establish the environment where testing will be conducted.
• Activities: Setting up hardware and software configurations, preparing test bed, and ensuring the test environment resembles the production environment.
• Outcome: Test environment setup and configuration document.
5. Test Execution
During the Test Execution phase, the actual testing is performed. Testers execute the test cases based on the planned strategy and document the outcomes.
• Objective: To execute test cases and identify defects.
• Activities: Executing test cases, logging defects, mapping defects to test cases, and re-testing and regression testing.
• Outcome: Test execution report, defect logs, and updated test cases.
6. Test Cycle Closure
The Test Cycle Closure phase marks the conclusion of the testing process. This phase involves evaluating the testing process, including test completion criteria, and analyzing test artifacts.
• Objective: To assess the testing process and ensure all planned testing activities are completed.
• Activities: Analyzing test results, preparing test closure reports, documenting lessons learned, and ensuring all defects are resolved.
• Outcome: Test closure report, metrics, and insights for future projects.
The Importance of the STLC
1. Structured Approach: The STLC provides a structured approach to testing, ensuring all aspects of software quality are evaluated.
2. Early Defect Detection: By starting the testing process early in the development cycle, defects are identified and resolved sooner, reducing the cost of fixing them later.
3. Risk Management: The STLC helps in identifying potential risks and their mitigation strategies early in the project lifecycle.
4. Resource Optimization: By planning resources and activities meticulously, the STLC ensures optimal use of resources, including human and technical resources.
5. Improved Product Quality: Systematic and thorough testing leads to the development of high-quality software that meets customer expectations and requirements.
Challenges in STLC
1. Requirement Changes: Frequent changes in requirements can lead to rework and affect the testing schedule.
2. Resource Constraints: Limited availability of skilled testers and necessary tools can hinder the testing process.
3. Time Constraints: Tight deadlines can lead to incomplete testing and potential defects in the final product.
4. Complex Test Environment: Setting up and maintaining a test environment that mirrors the production environment can be challenging.
Best Practices for Effective STLC
1. Early Involvement: Engage testers early in the software development life cycle to understand requirements and plan effectively.
2. Continuous Communication: Maintain open communication channels between development and testing teams to address issues promptly.
3. Automation: Implement test automation to increase efficiency and coverage, especially for regression testing.
4. Regular Reviews: Conduct regular reviews of test plans, test cases, and test environments to ensure alignment with project objectives.
5. Metrics and Analysis: Use metrics to track testing progress, defect density, and other key performance indicators to continuously improve the testing process.
Conclusion
The Software Testing Life Cycle is an integral part of the software development process. By following a structured approach to testing, organizations can ensure that they deliver high-quality software products that meet user expectations and perform reliably in real-world conditions. Despite the challenges, adhering to the STLC phases and best practices can significantly enhance the effectiveness and efficiency of the testing process, leading to successful software deployment and satisfied customers.
| keploy |
1,878,848 | 👾 Git - Getting Started Guide for Dummies 👾 | Note:- This is not an exhaustible tutorial to git. It's meant for people with no knowledge about the... | 0 | 2024-06-06T06:56:39 | https://dev.to/hammyasf/git-getting-started-guide-for-dummies-50a | git, github, source, control | Note:- This is not an exhaustible tutorial to git. It's meant for people with no knowledge about the subject, to provide an easier transition for them into the world of version control.
### What is Git?
Git is the most popular version control system which lets you manage, share and track your content.
### Why should you care?
Let's say you are working on a project with a team, it's a hassle sharing your code between peer, git solves that. Along side it's other benefits such as tracking your progress over time, it let's you easily and efficiently manage your projects without conflicts, making the process of maintain and sharing your project a breeze.
#### That kinda sounds confusing?
### Step 1 - Download and Install git
[Mac (OSX)](http://git-scm.com/download/mac) • [Windows](https://gitforwindows.org/) • [Linux](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git)
### Step 2 - Create your first git
Create a folder and navigate in it through your cmd or terminal (by the way if you are a windows user I would greatly suggest [CMDer](https://cmder.net/) as a CMD alternative.) Then run a git init as defined in the image.
### Step 3 - First File
Now that we have git initiated in our directory, let's create a new file in our directory. For this example, let's just make a standard text file in our folder. The file can contain anything, for this example, I'm going to use this.
### Step 4 - Let's add and commit
What do I mean when I say add and commit. So, in your terminal, you tell git what files do you want it to keep a track of (in a way). you can use * instead of the file name to grab everything as I'm going to do here. So go into your terminal and run git add * to add the file. After you are done with that. You type git commit -m "Added TextFile" to commit your changes. Now what I mean by commit- a commit is git's way of saving your files, in their current state, and having a copy of your current project/file you can traceback to at any time, It's git's way of saving something or as we can say commiting to your files. You can commit at the end of everyday or after every minor/major milestone in your project, it's on you. Just remember a commit is basically a point in history you can refer back to at any time. So it's like a journal that keeps a track of your project/files. Now to put the new commands in practice. Here's what you do.
## 🎉 Congratulations
You have successfully learned the basics of git.
### But wait.. what good does it serve me again?
While this covers the basics of git, in the very minimum, there is still a lot more to git. Which I do intend to cover in a follow up post to this, since it'll have a little complex terms than this, but nothing too daunting or anything. So you can look forward to that. However, I do want to mention 2 more commands that might come helpful to you.
### Bonus - Clone
While git is operate-able locally on your machine, it's true value shines when it's server over the network. For this you can use services like Github or BitBucket. You can even host your own git server using GitLab. Now let's talk about clone. Imagine you are browsing through Github and looking through all the projects that people created. You know you can clone the whole project in your machine and let git manage the versions of it for you? Well, here's how you do it. I've made a dummy git repository for you guys to clone. All you guys have to do is, go back to your terminal and run git clone https://github.com/hammyasf/git-tutorial.git <folder-name>. Notice that <folder-name> could be anything and it'll create a new folder with the folder-name provided with all the git files of the repository in it.
Now you can just cd into the folder and start editing the files like you just learned, being able to add and commit changes to it.
## Thank you for your time 🕰️
In the follow-up post I'll use a more in-depth tutorial on stuff like how to make your own repositories and commit stuff to them and how to update them. Also the concept of branches and merging. So stick around. Thanks 🙏
| hammyasf |
1,878,847 | Buy Verified Paxful Account | Buy Verified Paxful Account There are several compelling reasons to consider purchasing a... | 0 | 2024-06-06T06:54:56 | https://dev.to/robertthompson02/buy-verified-paxful-account-2clb | Buy Verified Paxful Account
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1,878,845 | Things to Be Considered While Using Workday Testing Tool | Workday has become a prominent provider of Cloud-based financial, planning, and human capital... | 0 | 2024-06-06T06:53:53 | https://elephantstages.com/workday-testing-tool/ | workday, testing, tool | 
Workday has become a prominent provider of Cloud-based financial, planning, and human capital management software in a field of enterprise software solutions. Robust testing is becoming more and more important as businesses use Workday to automate processes. Here comes into picture the Workday testing tool for thorough testing of Workday setups and making integrations easier. However, there are some aspects that businesses must be aware of to properly utilize its potential.
1. **Test Data Management**
A good testing endeavor must have effective management of test data. Assuring the availability of realistic, representative, and safe test data sets is crucial when utilizing the Workday testing tool. There are a lot of hazards associated with using production data, including breaches of data privacy and inadvertent changes to operational systems. On the other hand, testing scenarios may be erroneous or incomplete if insufficient or contrived test data is used.
2. **Test Scenario Design and Coverage**
The caliber and thoroughness of the test scenarios have a major impact on the efficacy of the Workday testing tool. It is imperative to create test cases that address a broad spectrum of integration points, edge situations, and functional requirements. Testing coverage gaps may result from failing to fully evaluate and take into account intricate business processes, data flows, and system interdependencies, which could expose the company to risks and vulnerabilities.
3. **Automation and Continuous Testing**
It is crucial in today’s competitive business environment to provide high-quality software upgrades and promptly adjust to changing requirements. Businesses may streamline their testing processes and shorten a time-to-market by utilizing Workday testing tool’s robust automation features. Teams may test integrations more consistently and efficiently by using automation to carry out load and performance testing, regression testing, and integration validation.
4. **Reporting and Traceability**
Testing that works requires more than just running test cases; it also requires thorough reporting and traceability. With the powerful reporting features offered by the Workday Testing Tool, teams can record and examine test results, spot patterns, and clearly and succinctly convey findings to relevant parties. Traceability is also essential for preserving transparency throughout the testing procedure and guaranteeing adherence to legal and industry standards.
5. **Training and Knowledge Sharing**
Despite the Workday testing tool’s user-friendly interface, using it effectively calls for a certain degree of skill and understanding. To make sure that the testing teams are competent in utilizing the tool’s numerous capabilities and functionalities, organizations need to make significant investments in training programs. Additionally, encouraging a culture of information exchange inside the company can significantly improve the testing procedure as a whole. Teams may improve testing procedures, cut down on effort duplication, and preserve consistency across many projects and initiatives by promoting cooperation, information sharing, and the documenting of best practices.
**Conclusion**
Organizations may optimize the advantages of the Workday testing tool by closely examining these five factors: reporting and traceability, automation and continuous testing, test data management, test scenario design and coverage, and training and knowledge sharing. Opkey is one of the leading powerful automation tools for businesses looking for Workday testing. Its test discovery mines process logs, instantly identifying existing tests and coverage gaps. With one-click, Opkey increases coverage with no coding needed. The intuitive no-code test builder empowers any team member to create complex tests via drag-and-drop. Users can stay ahead with proactive impact analysis alerting them to tests impacted before production changes. Opkey’s self-healing scripts ensure tests won’t break when apps change. The teams can seamlessly collaborate on broken tests, automatically generate reports, and save valuable time – all within Opkey’s integrated platform. | rohitbhandari102 |
1,878,842 | How to Implement Autoscaling in the Cloud: Practical Experience and Lessons from AutoMQ | Background Elasticity serves as the bedrock of cloud-native and Serverless architectures. From its... | 0 | 2024-06-06T06:49:45 | https://dev.to/automq/how-to-implement-autoscaling-in-the-cloud-practical-experience-and-lessons-from-automq-531n | Background
Elasticity serves as the bedrock of cloud-native and Serverless architectures. From its inception, AutoMQ has prioritized elasticity as a fundamental aspect of its offering. In contrast, Apache Kafka was developed during the data center era and tailored for physical hardware setups, relying heavily on local storage—a design less adaptable to today's cloud-centric environments. Yet, this does not imply Kafka should be discarded. Thanks to its robust ecosystem, Kafka has cemented a formidable position in the stream processing domain, with the Kafka API emerging as the standard protocol for stream processing. In light of this, AutoMQ has enthusiastically adopted the Kafka ecosystem. While maintaining compatibility with the computational aspects of Kafka, AutoMQ has adapted its underlying storage architecture to be cloud-native, thus maximizing the cloud's scalability, cost efficiency, and technological advances.
AutoMQ employs object storage and cloud disks to construct a core that facilitates rapid elasticity, thereby enabling automatic elasticity (hereinafter referred to as Autoscaling) within the cloud. This article will explore AutoMQ's implementation of Autoscaling in cloud environments and share insights and lessons learned from the endeavor.
What AutoMQ Aims for in Autoscaling
In streaming systems, the essence of Autoscaling lies in the system's capacity to dynamically scale its resources in response to fluctuating write workloads. As the write traffic increases, the cluster can swiftly expand to manage the increased demand; conversely, when the write traffic diminishes or even ceases, the cluster can contract, reducing resource expenditures and potentially scaling down to zero, thereby utilizing no resources whatsoever.
We believe that products with optimal autoscaling capabilities must possess the following characteristics:
- Built on public clouds or on sizable private clouds: The essence of cloud technology lies in the integration and reuse of resources, which yields technological and cost benefits. Public clouds, operating at the largest scale, offer the most significant advantages. The utility of autoscaling is in its ability to rapidly release resources when they are no longer needed, thus avoiding unnecessary expenses; and to quickly access reserved resources from the resource pool when needed again. Here, the vast scale of public clouds provides the greatest benefit. Although private clouds can achieve similar results, a 10% reserved capacity might equate to 100 machines in a private cloud, but on AWS, it could be 10,000 machines, highlighting the difference in scalability.
Tips: Currently and going forward, there will still be scenarios that necessitate deployments in non-cloud environments. However, given recent trends like the rise of Kubernetes, it is expected that the technical foundations of private infrastructures will increasingly align with those of public clouds. Private environments can also offer similar functionalities as cloud disks (openebs) and object storage (minio).
- Capable of fully leveraging cloud services: The core philosophy of AutoMQ is to utilize mature, scalable, and technically superior cloud services to develop its leading product capabilities. Regarding elasticity, after thorough research in multi-cloud environments, we observed that the elasticity of compute instance groups (also known as node groups) has become a standard feature. Thus, AutoMQ maximizes the use of cloud-based elastic scaling group services to facilitate the rapid deployment of production-level elastic capabilities.
Tips: As elastic scaling groups and their associated capabilities are becoming standardized across various clouds, the subsequent explanation will focus on AWS cloud services as an example.
From a technical perspective, the Autoscaling that AutoMQ pursues is:
- Fast Scaling: Here at "fast scaling," we primarily focus on the process of scaling out. In production environments, we usually adhere to the best practice of "scale out fast, scale in slow" to ensure a smooth autoscaling experience for the business. The quicker the AutoMQ cluster responds to a sudden surge in write traffic and completes the scaling out process until the final write throughput meets the target, the more efficient the scaling is considered.
- Precise Scaling: Precise scaling has two primary interpretations. First, the capacity adjustment should stabilize at the desired target as swiftly as possible, avoiding any fluctuations due to the settings of the elastic strategy. Secondly, the target capacity of the scaling should align precisely with the actual demand to prevent both over-scaling, which can lead to resource waste, and under-scaling, which can impact message end-to-end latency.
- Cost-efficient Scaling: Autoscaling largely depends on monitoring data to determine appropriate times to scale out or in. The storage, management, and application of metrics all involve additional costs.
Autoscaling Technology Architecture
Leveraging cloud capabilities simplifies AutoMQ's autoscaling architecture significantly. It includes the following components:
- Auto Scaling Group (abbreviated as ASG): AWS provides the Auto Scaling Group, which organizes EC2 computing instances into logical groups. It manages capacity at the group level and includes additional features such as machine monitoring, elasticity, and lifecycle hooks. This service is available at no cost across various cloud platforms.
- Cloud Watch: AWS cloud monitoring can set up monitoring and alerts to initiate capacity adjustments in ASG. AWS offers complimentary machine monitoring for EC2 (with a granularity of 5 minutes). In scenarios where the demand for rapid elasticity is low, this free service provided by cloud platforms can be fully leveraged to minimize costs.
- AutoMQ Control Panel: The control panel of AutoMQ, tasked with interfacing with the cloud's API, creates ASG elastic policies, and connects the alarm modules in Cloud Watch to the ASG's elastic policies. This integration ensures that reaching alarm thresholds can trigger adjustments in ASG's capacity. For ASG, linking elastic policies with the appropriate metric thresholds automates the capacity adjustment process once thresholds are met.
Challenges of Autoscaling in the Cloud
Understanding the characteristics and combined effects of various elasticity strategies offered by cloud providers
Cloud providers typically provide a range of standardized elasticity strategies that enable AutoMQ to quickly develop its own autoscaling capabilities. However, our experience has shown that the implementation is not always straightforward. Without a deep understanding of these strategies, there is a risk of misapplying them, which can lead to not achieving the intended results.
Here, we provide insights into how several elasticity strategies from AWS ASG (similar to those of other cloud providers) are applied by AutoMQ.
Simple Strategy
The Simple Strategy[1] activates based on metric-based alerts. When an alert is triggered, possible actions include scaling the number of compute instances up or down by x. The primary advantage of this strategy is its simplicity; however, it lacks the flexibility to dynamically fine-tune various steps based on different scenarios. Additionally, it's crucial to recognize that simple scaling requires a wait for either the scaling operation or a health check replacement to complete, and for the cooldown period to expire, before it can react to further alerts. The cooldown period is designed to prevent the initiation of additional scaling activities before the effects of the previous one are fully realized.
Elastic Policy Step Size: When an elastic policy is activated, necessitating an increase or decrease by x instances, x denotes the step size.
Cooldown Period: This period is the time required to wait after a previous scaling operation has completed. It's designed to allow the application to stabilize post-scaling before further capacity adjustments are made, thereby smoothing the scaling transitions and minimizing impact on the application.
Step Scaling Policy
The Step Scaling Policy[1] can be viewed as an advanced version of a basic strategy, permitting different step sizes based on varying monitoring thresholds. For instance, if the CPU utilization is between 75%-85%, add 2 instances; if between 85%-95%, add 3 instances; and if over 95%, add 4 instances. This method offers more nuanced control over capacity adjustments, helping to prevent both over and under scaling.
Target Tracking Policy
The main objective is to optimize capacity usage to prevent resource wastage. The Target Tracking Policy[2] achieves this by setting a target, such as CPU utilization, and allowing AWS to adjust the number of instances to be added or removed, with the step size being user-definable. What does it mean to maintain a value close to the target? AWS generally employs a capacity-first approach. For example, if a target CPU utilization of 50% is set and the Auto Scaling group exceeds this, adding 1.5 instances might approximate the CPU utilization back to 50%. Since adding 1.5 instances isn't practical, rounding up to two instances is the next best option. This adjustment might push the CPU utilization slightly below 50%, but it ensures that the application has ample resources. Conversely, if removing 1.5 instances would push the CPU utilization above 50%, only one instance would be removed.
When AutoMQ first adopted the Target Tracking Policy, the goal was to dynamically adjust the step size to reach the target capacity more accurately and quickly. However, it was found to be less effective than anticipated. In reality, integrating simple strategies often offers more flexibility than the Target Tracking for Policy, which does not permit customizing the step size adjustments.
Pre-test Expansion
Applicable for periodic loads (requiring at least 24 hours of data), AWS will utilize machine learning to best fit the load. This can be executed in conjunction with other scaling strategies. AutoMQ did not initially attempt this elasticity strategy. On one hand, AutoMQ, as a general stream processing system, is not only used in periodic load scenarios, and on the other hand, we cannot predict what kind of workload users will adopt.
Plan to Expand
Essentially, it's about scheduled scaling, where you can set up timed tasks to adjust capacity, which is suitable for scenarios like major promotions where there is a clear awareness of the target capacity.
How do multiple elastic policies work in the event of a conflict?
Different cloud vendors have varying methods for handling conflicts between elasticity policies. Proper use of these policies requires a thorough understanding of how they behave during conflicts. For instance, on Alibaba Cloud, when there is a conflict between elasticity policies, the results of the two policies are cumulatively applied. For example, if one policy calls for a scale-out of four instances, and another calls for a scale-in of two, the final result would be a scale-out of two instances. However, AWS's approach to elasticity policies primarily prioritizes maintaining capacity to ensure availability. When multiple elasticity policies conflict, AWS prioritizes the execution of the policy that results in a larger capacity.
Seeking the golden metrics for triggering elastic execution
Elastic policies are merely logical execution plans. Deciding when to trigger the execution of these policies is a crucial challenge in practice. The triggering conditions for the execution of elastic policies are based on monitored data. Identifying a golden metric that triggers elasticity accurately is key. However, in real-world production applications, factors such as deployment models and workload can affect the choice of this golden metric.
Ideally, we hope the application kernel can provide a golden metric. Any external environment bottlenecks, such as high CPU Load or network traffic congestion, can ultimately be reflected in this unique golden metric. Unfortunately, Kafka itself does not provide such a metric at the kernel side. Currently, AutoMQ determines the timing of automatic elasticity based on network traffic. According to our judgment, the golden metric for elasticity cannot be a single metric, but a composite metric combining multiple factors and weights. Key factors can include the network uplink and downlink traffic of broker machines, CPU usage, memory usage, disk IOPS and bandwidth, etc. The weight of these factors will vary under different loads and hardware environments. The ideal situation in the future is for AutoMQ to provide a default multi-factor metric to guide the triggering of elasticity, and users can also customize the factors and weights involved in the composite metric.
AutoMQ's final application of elasticity policies
Scheduled Elasticity
The core of AutoMQ's elasticity strategy is a target-tracking strategy based on simple rules, augmented by an optional scheduled elasticity policy. The default target-tracking strategy utilizes moderate scaling steps to ensure a smooth application of elasticity and to minimize resource waste. However, in scenarios like e-commerce promotions or food delivery services, where traffic spikes occur during specific periods, relying solely on the default elasticity policy may prove inadequate. Thus, integrating an optional scheduled elasticity policy is essential for effective elasticity management in production environments. Scheduled elasticity involves proactive capacity planning by humans—a heuristic approach—where the cluster automatically downscales to a predetermined capacity post-peak traffic periods. The scheduled elasticity policy leverages cloud infrastructure capabilities, setting execution times and target capacities based on cron expressions. For instance, the scheduled elasticity strategy below is well-suited for the food service industry, scaling up at 11 AM to a specified capacity of 20 and then scaling down at 2 PM to a lower target capacity.
Custom Target Tracking Strategy
AutoMQ has developed a custom target tracking strategy founded on a straightforward policy. This strategy, now the default, is activated by network traffic and meets the demands of most standard scenarios. Offering more flexibility than typical cloud default target tracking policies, it allows for swift scaling up and gradual scaling down, enhancing the robustness of the elasticity effect in real-world applications. The custom target tracking strategy employs a simple policy for scaling up and another for scaling down.
In the custom target tracking strategy, the step sizes for scaling up and down are proportionally adjusted, ensuring uniform scaling efficiency across varying cluster sizes. The elasticity policies displayed on AWS ASG are as follows.
Since most clouds already provide default metrics collection, AutoMQ's default elasticity strategy does not necessitate independent metrics collection and management. Leveraging these cloud capabilities can significantly simplify our implementation. Let's first define the variables involved in the elasticity strategy expressions:
- network-in bytes (nin): the cumulative number of bytes of network traffic incoming during each metric reporting interval.
- network-in bytes per second (nins): AWS calculates the bytes per second using the formula nins = nin / DIFF_TIME(nin), which determines the rate of network inbound bytes per second.
- network-out (nout): Cumulative network outbound bytes during each metric reporting interval.
- network-out bytes per second (nouts): AWS calculates the bytes per second using the formula nouts = nout / DIFF_TIME(nout), which determines the rate of network outbound bytes per second.
- active instance count in ASG (acount): Number of active instances in an ASG, with AWS typically aggregating metrics for the group, necessitating a division by the number of broker machines in the ASG to calculate the traffic per broker.
- upper: Network traffic threshold for scaling up, generally set at 80% of the instance type's network bandwidth cap, though this value can be customized by users.
- lower: Network traffic threshold for scaling down, typically set at 50% of the instance type's network bandwidth minimum, with the option for user customization.
Simple scaling strategy for expansion is as follows, meaning: If the average network traffic of inbound or outbound per broker exceeds the set average bandwidth, then scale up by our set step (default is 10% of current capacity and at least one instance). It is essential to note that for computing instances provided by cloud providers, if the network bandwidth is assumed to be 100MB/s, it would imply 100MB/s each for both inbound and outbound.
max(nins/acount,nouts/acount) > upper
The simple elastic strategy for scaling down is as follows, meaning: Scale down only when the following three conditions are met:
- The minimum number of live brokers must be at least 1; it is not allowed to scale down to zero.
- A scale-down is permitted only when the average network traffic of incoming or outgoing brokers is below the set threshold limit.
- The third part essentially assumes a reduction of one broker from the current count, then calculates the value according to the scaling-up formula, ensuring it remains below our set upper threshold. This approach primarily aims to prevent the behavior of scaling down and then immediately scaling up in small-scale clusters, where frequent scaling activities can significantly impact the cluster.
acount>1 && ( max(nins/acount,nouts/acount) < lower ) && ( max(nins/acount-1,nouts/acount-1) < upper )
AutoMQ Elasticity Effect Display
The figure below shows the relationship between cluster size and network traffic under a varying load in AutoMQ, demonstrating how well the broker count adapts to changes in traffic, achieving effective automatic elasticity. For frequently varying loads, enabling automatic elasticity can significantly save costs, achieving a pay-as-you-go effect. For specific experimental tests, please refer to our cost report [4].
Looking Towards the Future of AutoMQ Autoscaling
The current automatic elasticity capabilities still have many areas that could be optimized, including:
- More effective elasticity strategy trigger gold standards: providing a default set of metrics for elasticity strategies and their accompanying product capabilities. The default metrics set allows the elasticity strategies to adapt to a wider range of scenarios. Providing product capabilities enables users to flexibly adjust the composition and weight of metrics according to their specific scenarios, thus achieving more precise elasticity effects.
- Multi-cloud Auto-Scaling Adaptation: Currently, some cloud platforms still lack support for automatic scaling. There are significant variations in cloud monitoring, alerting, and automatic machine monitoring collection capabilities across different Cloud providers. Enhancing auto-scaling to accommodate more clouds is crucial for developing a robust multi-cloud auto-scaling framework.
- Custom Monitoring Collection and Reporting: During our implementation, we've observed disparities in the monitoring capabilities and SLAs offered by various Cloud providers. In stringent scenarios, the default monitoring collection and reporting mechanisms provided by cloud vendors may prove inadequate. For instance, AWS's default machine monitoring operates at one-minute intervals. For more immediate scaling requirements, adopting a model where AutoMQ independently collects and reports monitoring data is essential. This method allows for more flexible and controllable monitoring data, and it also facilitates ongoing optimization of monitoring metrics collection and storage, ultimately reducing infrastructure costs.
- Auto-Scaling on K8S: In the context of k8s, we have begun experimenting with AutoScaler [5]. As a major player in the current cloud-native landscape, k8s boasts a substantial user base. AutoMQ is committed to staying current, enabling users to leverage AutoMQ's auto-scaling capabilities on k8s platforms as well.
References
[1] Step and simple scaling policies for Amazon EC2 Auto Scaling: https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-scaling-simple-step.html
[2] Target tracking scaling policies for Amazon EC2 Auto Scaling: https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-scaling-target-tracking.html
[3] Basic monitoring and detailed monitoring: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/cloudwatch-metrics-basic-detailed.html
[4] AutoMQ Cost Analysis Report: https://docs.automq.com/zh/docs/automq-s3kafka/EJBvwM3dNic6uYkZAWwc7nmrnae
[5] AutoScaler: https://github.com/kubernetes/autoscaler
| automq | |
1,878,840 | Hire Skilled SEO Experts: Staying Ahead of the Competition | In today’s digital landscape, businesses must adapt to ever-changing algorithms and consumer... | 0 | 2024-06-06T06:49:07 | https://dev.to/ajmal_kp/hire-skilled-seo-experts-staying-ahead-of-the-competition-26dg | <p> <img alt="" class="bg kp lu c" height="394" loading="eager" role="presentation" src="https://miro.medium.com/v2/resize:fit:1400/1*wZoehqz-LgqpjpHhf6JA6g.png" style="background-color: white; box-sizing: inherit; color: rgba(0, 0, 0, 0.8); font-family: medium-content-sans-serif-font, -apple-system, "system-ui", "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif; height: auto; max-width: 100%; vertical-align: middle; width: 680px;" width="700" /></p><p class="pw-post-body-paragraph lv lw fr lx b ly lz ma mb mc md me mf mg mh mi mj mk ml mm mn mo mp mq mr ms fk bj" data-selectable-paragraph="" id="b6b8" style="background-color: white; box-sizing: inherit; color: #242424; font-family: source-serif-pro, Georgia, Cambria, "Times New Roman", Times, serif; font-size: 20px; letter-spacing: -0.003em; line-height: 32px; margin: 2.14em 0px -0.46em; word-break: break-word;">In today’s digital landscape, businesses must adapt to ever-changing algorithms and consumer behaviors to maintain a competitive edge. A robust online presence is crucial, and hiring skilled SEO experts is a key strategy to achieve this. If you are looking to enhance your website’s visibility and drive more organic traffic, it’s time to <a class="af mt" href="https://jurysoft.com/raas/hire-seo-experts-in-bangalore.php" rel="noopener ugc nofollow" style="-webkit-tap-highlight-color: transparent; box-sizing: inherit;" target="_blank">hire SEO experts</a> in Bangalore.</p><h1 class="mu mv fr be mw mx my mz na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr bj" data-selectable-paragraph="" id="a986" style="background-color: white; box-sizing: inherit; color: #242424; font-family: sohne, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 24px; letter-spacing: -0.016em; line-height: 30px; margin: 1.95em 0px -0.28em;">The Importance of SEO in Modern Business</h1><p class="pw-post-body-paragraph lv lw fr lx b ly ns ma mb mc nt me mf mg nu mi mj mk nv mm mn mo nw mq mr ms fk bj" data-selectable-paragraph="" id="f016" style="background-color: white; box-sizing: inherit; color: #242424; font-family: source-serif-pro, Georgia, Cambria, "Times New Roman", Times, serif; font-size: 20px; letter-spacing: -0.003em; line-height: 32px; margin: 0.94em 0px -0.46em; word-break: break-word;">Search Engine Optimization (SEO) is the process of optimizing your website to rank higher in search engine results pages (SERPs). 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1,878,838 | Key mathematical formulas and concepts relevant to AI | Artificial Intelligence (AI) relies heavily on a foundation of mathematical principles. Here’s a... | 0 | 2024-06-06T06:45:43 | https://dev.to/ak_23/key-mathematical-formulas-and-concepts-relevant-to-ai-3f1k | math, ai, beginners, learning | Artificial Intelligence (AI) relies heavily on a foundation of mathematical principles. Here’s a concise overview of some of the key mathematical concepts and formulas
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1,878,836 | Golden Moments: Creating Ambiance with Gold Pendant Lights | Golden Moments: Gold Pendant Lights Golden Moment's gold pendant lights are really a choice popular... | 0 | 2024-06-06T06:44:22 | https://dev.to/ronald_woodgo_ba03f686524/golden-moments-creating-ambiance-with-gold-pendant-lights-34n6 | design | Golden Moments: Gold Pendant Lights
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1,878,835 | Introduction to RangeBreak Strategy | The RangeBreak strategy was originally derived from futures and foreign exchange trading and is a... | 0 | 2024-06-06T06:43:31 | https://dev.to/fmzquant/introduction-to-rangebreak-strategy-5a5d | strategy, trading, cryptocurrency, fmzquant | The RangeBreak strategy was originally derived from futures and foreign exchange trading and is a type of intraday breakthrough strategy. In the <<Futures Truth Magazine>>(US authoritative trading system selection magazine), it has been ranked in the top ten for many years. Both professional investment institutions and individual traders are widely used.
However, if a trading strategy is widely known to the public, then the application of this trading strategy in actual combat will be greatly reduced. Therefore, the purpose of this article is not to introduce the RangeBreak strategy for everyone to make a hard copy, but to learn from the RangeBreak strategy, let everyone integrate from a profitable trading system, improve the ability of trading.
## The calculation method of RangeBreak strategy
The original RangeBreak strategy was the opening price of the day and the price volatility of yesterday to determine the long and short direction of today. The opening price of the day plus the price volatility of yesterday formed the upper track, and the opening price of the day minus the price volatility of yesterday formed the lower track. If the price rises above the upper limit, it will enter the market go long and if the price falls below the lower limit, it will enter the market and go short. There is no stop loss and take profit.
The Specific calculation formula are:
```
Upper rail = opening price of the day + (yesterday's highest price - yesterday's lowest price) x N
Lower track = opening price of the day - (yesterday's highest price - yesterday's lowest price) x N
The price rose above the upper rail, the long position opened
The price fell below the lower rail, the short position opened
When time close to market close, close all positions
```
Some readers may find that there is a variable N when calculating the upper and lower tracks, readers may wondering why the yesterday price fluctuations are multiplied by N, what does this N mean? In fact, the variable N here has no special meaning. The reason why a variable N is added to this place is that the trader can flexibly adjust the distance between the upper and lower rails according to the specific trading variety or the subjective experience of the individual. The parameter range can be from 0.1 to 1.5.
## RangeBreak strategy source code
Open: fmz.com > Login > Dashboard > Strategy Library > New Strategy. In the upper left corner of the Strategy editing interface, click the drop-down box and select the programming language: My language to start writing the Strategy. Note the comments in the code below.
```
Q:=BARSLAST(DATE<>REF(DATE,1))+1; // Judge whether it is a new day's K line
DIFF:=REF(HHV(HIGH,Q),Q)-REF(LLV(LOW,Q),Q); // The price difference between the highest and lowest price yesterday
OO: VALUEWHEN (Q=1, OPEN); // Opening price of the day
UP: OO+DIFF*N; // upper rail
DOWN: OO-DIFF*N; // lower rail
TIME>=0905&&TIME<1455&&CLOSE>UP,BK; // long position open
TIME>=0905&&TIME<1455&&CLOSE<DOWN,SK; // short position open
TIME>=1455,CLOSEOUT; // close the position
AUTOFILTER; // signal filtering
```
## RangeBreak strategy backtest
In order to get closer to the real trading environment, we used the 2 pips of slippage and 2 times of the transaction fee to test the pressure during the backtest. The test environment is as follows:
Trading variety: BTC to USDT
Time: June 01, 2015 ~ June 28, 2019
Cycle: daily K-line
Slippage: 2 pips for opening and closing positions
Transaction Fee: 2 times of the exchange standard
Fund curve
From the above backtest results, the strategy preforms very good when the market trend is smooth, whether in the rise or fall, the Aron indicator can completely track the market. The capital curve also showed an overall upward trend, and there was no significant retracement. However, in the volatile market, especially in the continuous shock market, there was a partial retracement.
## RangeBreak strategy improvement
As shown in the above figure, the original RangeBreak strategy is not satisfactory even when the market trend is obvious, especially when the market is in a state of shock, the capital curve fluctuates greatly. When the market is in a long-term shock, there is a large retracement. Therefore, We know that RangeBreak is a trend-oriented strategy, and it also has the weakness of the trend strategy.
It is important to note that the original strategy used the simple yesterday's highest price to subtract yesterday's lowest price when calculating yesterday's volatility. However, when calculating the price volatility, you can use the ATR indicator, because ATR represents the average real volatility of the price, such as the ATR used in the Turtle Trading Rules.
In addition, the price trend of cryptocurrency tends to rise slowly, and it falls more urgently when falling. So we can use N1 and N2 when calculating the upper and lower rails, which can make the strategy more flexible. Respond to different market conditions.
## Strategy source code
Click to copy the full Strategy source code, based on My language, for commodity futures and digital currency
For more information, please check : https://www.fmz.com/strategy/156836
## Summary
Just like the design concept of the RangeBreak strategy, never predict whether the market will eventually rise or fall, as long as the price breaks the upper and lower rails of the day, it indicates the direction of the market price trend that day, and traders only need to follow the signal. In addition, you can also improve according to your trading habits or market characteristics, upgrade and iterative this trading strategy.
From: https://blog.mathquant.com/2019/07/23/introduction-to-rangebreak-strategy.html | fmzquant |
1,878,832 | What is the best way to center elements in a CSS page? | To center elements in a CSS page, you have several methods at your disposal, each suitable for... | 0 | 2024-06-06T06:39:37 | https://dev.to/elightwalk/what-is-the-best-way-to-center-elements-in-a-css-page-10ii | css, webdesign, center, elements | To center elements in a CSS page, you have several methods at your disposal, each suitable for different scenarios. Here’s a detailed explanation of each method you listed:
**1. Display: flex/grid**
This code is highly flexible and effective for centering elements both vertically and horizontally within a parent element.
```
.parent-element {
display: flex;
justify-content: center;
align-items: center;
}
```
Ideal for centering multiple child elements and useful when the content size is dynamic.
**2. position: fixed**
This code centers a single element in the viewport, regardless of scrolling.
```
.position-element {
position: fixed;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
z-index: 100;
}
```
It is ideal for modal dialogs, loading spinners, or any element that should remain centered regardless of scrolling.
**3. text-align:center**
This code centers inline or inline-block elements horizontally within a block-level parent element.
```
.parent-element {
text-align:center
}
.child-element {
display: inline-block;
}
```
Suitable for centering text or inline-block elements within a parent.
**4. margin:auto**
This code centers block-level elements horizontally within a container.
```
.margin-element {
width:500px;
margin:0 auto;
}
```
Ideal for centering fixed-width block elements within their parent.
Choose the code based on the specific needs of your layout and the type of elements you are working with. We hope this basic information helps developers better understand how to centre elements on a webpage. Still, this small detail adds flexibility to the process of [web design and development](https://www.elightwalk.com/services/ui-ux-development).
| elightwalk |
1,878,785 | Self-Training LLMs for Text Classification using DQC Toolkit | Large language models (LLMs) have demonstrated exceptional language capabilities. In the context of... | 0 | 2024-06-06T06:37:00 | https://dev.to/sumanthprabhu/self-training-llms-for-text-classification-using-dqc-toolkit-13a4 | nlp, machinelearning, datascience, llm | Large language models (LLMs) have demonstrated exceptional language capabilities. In the context of Text Classification, if Labelled Data is unavailable, LLMs are commonly employed using [In-Context Learning](https://arxiv.org/abs/2301.00234) (ICL). With ICL, the LLM implicitly learns how to classify text by relying on a task instruction and (optionally) a few labelled examples relevant to the task. While this approach may appear to be flexible and powerful, it can often be sensitive to the choice of prompts, choice of ICL examples, etc. resulting in poor performance. In such scenarios, can we improve the performance of the LLM without manually labelling more data ?
In this article, we will be talking about Self-Training LLMs for Text Classification. [Self-Training](https://arxiv.org/abs/2202.12040) is a semi-supervised learning approach which leverages a model’s own predictions on unlabelled data to build a labelled dataset for training of the model. Concretely, we will use the LLM to predict labels for unlabelled data to construct a training dataset and then fine-tune the LLM on the training data.
Intuitively, the main downside of Self-Training is its inability to correct its own mistakes. Typically, the most confident predictions of the model are the only samples considered to be included in the labelled dataset. However, “confidence” does not always imply “correctness”. Incorrectly labelled samples can end up amplifying the LLM errors.
To address this, we include a “Label Correction” step. We use [DQC-Toolkit](https://github.com/sumanthprabhu/DQC-Toolkit), a Python library that facilitates improvement of Machine Learning models by identifying and mitigating label errors in training dataset.
## Pre-liminaries
Most of the code is based on our [previous post](https://dev.to/sumanthprabhu/can-llms-truly-understand-text-based-emotion--547e). For the purposes of our experiment, we will be using [Mistral-7B](https://huggingface.co/mistralai/Mistral-7B-Instruct-v0.2) as our LLM. We will also extend the observations to [Llama3–8B](https://huggingface.co/meta-llama/Meta-Llama-3-8B) at the end of the article.
We begin by installing and loading the required dependencies. We will require the Python version to be ≥ 3.9
```python
!pip install transformers
!pip install bitsandbytes
!pip install accelerate
!pip install huggingface_hub
!pip install peft
!pip install dqc-toolkit
```
```python
from datasets import load_dataset, Dataset
from typing import List, Union
import numpy as np
import pandas as pd
import torch
import transformers
import wandb
import warnings
transformers.logging.set_verbosity_error()
wandb.init(mode="disabled")
warnings.filterwarnings('ignore')
```
## Dataset
We will be using [emotion](https://huggingface.co/datasets/dair-ai/emotion), a publicly available dataset hosted on Hugging Face. It consists of English-language tweets annotated with one of six emotions as shown below —
\[‘sadness’, ‘joy’, ‘love’, ‘anger’, ‘fear’, ‘surprise’\]
The dataset has 16,000 training samples and 2,000 validation samples.
We also extend the observations to the [MTOP domain](https://huggingface.co/datasets/mteb/mtop_domain) dataset towards the end of the article.
```python
from datasets import load_dataset
import pandas as pd
dataset = 'dair-ai/emotion'
dset = load_dataset(dataset, trust_remote_code=True)
train_data = pd.DataFrame(dset['train'])
val_data = pd.DataFrame(dset['validation'])
train_data.head()
```
Since LLMs cannot comprehend the emotion labels in integer format, we define a mapping of the integer labels to semantic text descriptions and create text labels for downstream consumption.
```python
label_to_text = {0 : 'sadness',
1 : 'joy',
2 : 'love',
3 : 'anger',
4 : 'fear',
5 : 'surprise'}
train_data['label_text'] = train_data['label'].map(label_to_text)
val_data['label_text'] = val_data['label'].map(label_to_text)
```
## Evaluation Metric
For the purpose of benchmarking our experiments, we choose Weighted F1 score as the metric. We also display the [classification report](https://scikit-learn.org/stable/modules/generated/sklearn.metrics.classification_report.html) and [confusion matrix](https://scikit-learn.org/stable/modules/generated/sklearn.metrics.confusion_matrix.html) for detailed interpretation.
```python
from sklearn.metrics import (classification_report, confusion_matrix,
ConfusionMatrixDisplay, f1_score)
import matplotlib.pyplot as plt
def fetch_performance_metrics(y_true: np.ndarray, y_pred: np.ndarray, exp_name: str,
display_report: bool = True, display_confusion_matrix: bool = True,
label_list: List[str] = ['sadness', 'joy', 'love', 'anger', 'fear', 'surprise'],
num_labels: int = 6) -> dict:
"""
Util function to compute F1 score and optionally display the classification report and confusion matrix for a given experiment.
Args:
y_true (np.ndarray): Array containing true labels.
y_pred (np.ndarray): Array containing predicted labels.
exp_name (str): Name of the experiment (used to save results).
display_report (bool, optional): Boolean flag indicating whether to display classification report (True) or not (False). Defaults to True.
display_confusion_matrix (bool, optional): Boolean flag indicating whether to display confusion matrix (True) or not (False). Defaults to True.
label_list (list, optional): List of labels. Defaults to ['sadness', 'joy', 'love', 'anger', 'fear', 'surprise'].
num_labels (int, optional): Number of unique labels. Defaults to 6.
Returns:
dict: A dictionary containing F1 score.
"""
if display_report:
print('\nClassification Report:')
print(classification_report(y_true=y_true, y_pred=y_pred, labels=list(range(num_labels)),
target_names=label_list[:num_labels]))
if display_confusion_matrix:
cm = confusion_matrix(y_true=y_true, y_pred=y_pred)
fig, ax = plt.subplots(figsize=(8, 8))
display = ConfusionMatrixDisplay(confusion_matrix=cm, display_labels=label_list)
display.plot(ax=ax)
plt.savefig(exp_name)
return {'F1-score' : f1_score(y_true, y_pred, average='weighted')}
```
Alright ! let’s begin.
## Baseline : LLM with ICL
We will need to login to Hugging Face hub to be able to access the LLM. We do this via Hugging Face’s [notebook\_login](https://huggingface.co/docs/huggingface_hub/en/package_reference/login#huggingface_hub.notebook_login)
```python
from huggingface_hub import notebook_login
notebook_login()
```
### Defining the LLM Pre-liminaries
We define a few LLM Utility functions as we did in the [previous post](https://dev.to/sumanthprabhu/can-llms-truly-understand-text-based-emotion--547e).
```python
from peft import AutoPeftModelForCausalLM
from tqdm import tqdm
from transformers import (AutoTokenizer, AutoModelForCausalLM,
BitsAndBytesConfig, pipeline)
import datasets
def _generate_predictions(example: datasets.formatting.formatting.LazyBatch,
generator: pipeline, text_column: str,
max_new_tokens: int = 9, split_token: str ='[/EMOTION]') -> dict:
"""
Generates predictions using the text generation model for a given example.
Args:
example (datasets.formatting.formatting.LazyBatch): Batch of samples from a dataset.
generator (pipeline): Huggingface pipeline for text generation.
text_column (str): Prompt for the text generation model.
max_new_tokens (int, optional): Maximum number of tokens to generate. Defaults to 9.
split_token (str, optional): Token to demarcate the emotion prediction. Defaults to '[/EMOTION]'.
Returns:
dict: A dictionary containing the generated predictions.
"""
num_examples = len(dataset)
predictions = []
batch_results = generator(example[text_column], max_new_tokens=max_new_tokens, num_return_sequences=1)
predictions.extend([result[0]["generated_text"] for result in batch_results])
return {'prediction' : predictions}
def infer_LLM(model_name: str, input_ds: Dataset, batch_size: int = 4, max_new_tokens: int = 9,
text_column: str = 'emotion_prompt', finetuned_model_path: str = None) -> Dataset:
"""
Util function to run LLM inference
Args:
model_name (str): The name or path of the LLM model.
input_ds (Dataset): Input dataset containing text prompts.
batch_size (int, optional): Batch size for inference. Defaults to 4.
max_new_tokens (int, optional): Maximum number of tokens to generate. Defaults to 9.
text_column (str, optional): Name of the column containing text prompts. Defaults to 'emotion_prompt'.
finetuned_model_path (str, optional): Path to the fine-tuned model. Defaults to None.
Returns:
dataset: Dataset with generated predictions.
"""
quantization_config = BitsAndBytesConfig(
load_in_4bit=True,
bnb_4bit_compute_dtype=torch.float16,
bnb_4bit_quant_type="nf4",
bnb_4bit_use_double_quant=True,
)
tokenizer = AutoTokenizer.from_pretrained(model_name, padding_side="left")
if finetuned_model_path is None:
model = AutoModelForCausalLM.from_pretrained(model_name, device_map="auto",
quantization_config=quantization_config)
else:
model = AutoPeftModelForCausalLM.from_pretrained(finetuned_model_path,
device_map="auto",
quantization_config=quantization_config)
text_generator = pipeline("text-generation", model=model, tokenizer=tokenizer,
batch_size=batch_size, truncation=False)
text_generator.tokenizer.pad_token_id = model.config.eos_token_id
input_ds = input_ds.map(_generate_predictions, fn_kwargs={'generator' : text_generator,
'text_column' : text_column,
'max_new_tokens' : max_new_tokens
},
batched=True, batch_size=batch_size)
return input_ds
def build_LLM_prompt(input_ds: Dataset, label_column: str = None, prompt_template: Union[str, None] = None,
with_label: bool = False) -> Dataset:
"""Util function to build the LLM prompt from input text data
Args:
input_ds (Dataset): Input dataset containing text
label_column (str, optional): Label column in the data. Applicable if constructing prompts for in-context samples / finetuning LLM. Defaults to None.
prompt_template (Union[str, None], optional): Text instruction to prepend to each transformed input text sample. Defaults to None.
with_label (bool, optional): `True` if the prompts should include labels from the `label_column`. Defaults to False.
Returns:
Dataset: Dataset with generated predictions.
"""
if type(input_ds) == pd.DataFrame:
input_ds = Dataset.from_pandas(input_ds)
if with_label:
input_ds = input_ds.map(lambda x: {'emotion_prompt': '[UTTERANCE]' + x['text'] + '[/UTTERANCE]' + \
'[EMOTION]' + x[label_column] + '[/EMOTION]'})
else:
input_ds = input_ds.map(lambda x: {'emotion_prompt': prompt_template + '[UTTERANCE]' + x['text'] + '[/UTTERANCE]' + \
'[EMOTION]'})
return input_ds
def _extract_label(sample: datasets.formatting.formatting.LazyRow, label_list: List[str]) -> dict:
"""Util function to extract the emotion from the generated LLM prediction
Args:
sample (datasets.formatting.formatting.LazyRow): Batch of samples from a dataset
label_list (List[str]): List of possible emotions
Returns:
dict: Dictionary of extracted predicted labels
"""
prompt_length = len(sample['emotion_prompt'])
generated_answer = sample['prediction'][prompt_length:].split('[/EMOTION]')[0].lower()
label_matched = False
predicted_label = None
for label in label_list:
if label in generated_answer:
predicted_label = label
label_matched = True
break
if not label_matched:
predicted_label = "no_match"
return {'predicted_label' : predicted_label}
def run_llm(val_data: pd.DataFrame, prompt_template: str, model_name: str, emotion_list: List[str], label_mapping: dict,
label_column: str = 'label', batch_size: int = 4, finetuned_model_path: str = None,
num_labels: int = 6, compute_metrics: bool = True) -> dict:
"""Run end-to-end LLM inference (from pre-processing input data to post-processing the predictions) and return the computed performance metrics on input validation data
Args:
val_data (pd.DataFrame): Validation data with labels
prompt_template (str): Text instruction to prepend to each transformed input text sample.
model_name (str): The name or path of the pre-trained LLM.
emotion_list (List[str]): List of possible emotions
label_mapping (dict): Dictionary mapping to convert text labels to integers
label_column (str, optional): Label column in the data. Defaults to 'label'.
batch_size (int, optional): Batch size for inference. Defaults to 4.
finetuned_model_path (str, optional): Path to the fine-tuned model, if available.. Defaults to None.
num_labels (int, optional): Number of unique labels. Defaults to 6.
compute_metrics (bool, optional): Boolean flag indicating whether to compute the performance metrics (True) or not (False)
Returns:
dict: A dictionary containing F1 score.
"""
predicted_label_list = []
val_ds = build_LLM_prompt(val_data, prompt_template=prompt_template)
val_ds_with_pred = infer_LLM(model_name, val_ds, batch_size, finetuned_model_path=finetuned_model_path)
predicted_label_list = val_ds_with_pred.map(_extract_label,
fn_kwargs={"label_list": emotion_list[:num_labels]})['predicted_label']
y_pred = [label_mapping[pred] if pred in label_mapping else num_labels for pred in predicted_label_list]
y_true = val_data[label_column].astype(int).values.tolist()
if num_labels not in y_pred:
# All LLM predictions match a valid emotion from `emotion_list`
emotion_list.remove('no_match')
if compute_metrics:
return y_pred, fetch_performance_metrics(y_true, y_pred, 'mistral_7b', label_list=emotion_list)
return y_pred
```
In summary -
* `build_LLM_prompt` transforms the input text into a LLM prompt
* `infer_LLM` and `_generate_predictions` instantiate the LLM using 4 bit quantization and run inference with the constructed input prompts.
* `_extract_label` maps the LLM free text outputs to valid emotion predictions. If the generated text has no matching emotion, the predicted label is set to “*no\_match*”.
* `run_LLM` invokes functions `build_LLM_prompt` and `infer_LLM` to perform inference and return the computed performance metrics on input validation data.
### Build the LLM prompt
We select one sample at random for each label and build the prompt prefix to run ICL.
```python
model_name = "mistralai/Mistral-7B-Instruct-v0.2"
seed = 43
sample_data = train_data.groupby('label_text').sample(n=1, random_state=seed).reset_index(drop=True)
emotion_list = ['sadness', 'joy', 'love', 'anger', 'fear', 'surprise']
emotion_list_str = ', '.join(emotion_list)
transformed_sample_data = build_LLM_prompt(sample_data, with_label=True, label_column='label_text')
samples_str = '\n'.join(transformed_sample_data['emotion_prompt'])
prompt_template = "<s>[INST] You are a helpful, respectful and honest assistant. Choose one option that best describes the emotion behind the given utterance based on the following comma separated options: " + emotion_list_str + "[/INST] </s>"
```
### Putting it all to work
We are ready to run our LLM now.
```python
text_to_label = {v: k for k, v in label_to_text.items()}
llm_emotion_list = emotion_list + ['no_match']
_, score = run_llm(val_data, prompt_template, model_name, llm_emotion_list, text_to_label,
batch_size=64)
print(score)
```
The F1-score is **0.442** with a large proportion of the samples ending up in the “no\_match” bucket. Can we do better than this ? Let’s find out.
## Our Approach : Self-Training using DQC Toolkit
Self-Training LLMs for Text Classification using DQC Toolkit
As shown in the figure, our proposed self-training approach is comprised of the following three steps -
1. Generate LLM Predictions for Unlabelled Data
2. Apply Label Correction using DQC Toolkit
3. Fine-tune LLM using Reliably Labelled Data
### Step 1 — Generate LLM Predictions for Unlabelled Data
We leverage LLM with ICL to generate initial labels for training our model.
```python
predictions = run_llm(train_data, prompt_template, model_name, llm_emotion_list, text_to_label,
batch_size=64, compute_metrics=False)
```
As mentioned before, many predictions can end up being mapped to “*no\_match*” (when we are unable to extract the emotion prediction from the LLM’s generated answer). We remove such samples from the data.
```python
train_data['llm_predicted_label'] = pd.Series(predictions)
## Only valid label predictions
train_data_with_llm_pred = train_data.loc[train_data['llm_predicted_label'] < len(emotion_list), ].reset_index(drop=True)
```
### Step 2 — Apply Label Correction using DQC Toolkit
Currently, DQC toolkit offers `CrossValCurate` for curation of text classification datasets (binary / multi-class) using cross validation based label prediction. We will leverage this module to acquire better quality labels for our data.
```python
cvc = CrossValCurate(random_state=seed,
calibration_method='calibrate_using_baseline' )
train_data_curated = cvc.fit_transform(train_data_with_llm_pred, y_col_name='llm_predicted_label')
```
`CrossValCurate` accepts two parameters `random_state` (random seed for reproducibility) and `calibration_method`(whether/how to calibrate the prediction probabilities of the model being trained for label correction). You can check out all the hyper-parameters available in the documentation [here](https://sumanthprabhu.github.io/DQC-Toolkit/latest/api/crossval/).
The returned object _`train_data_curated`_ is a Pandas dataframe similar to the input dataframe _`train_data_with_llm_pred`_ with the following additional columns -
* ‘`label_correctness_score`*’* represents a normalized score quantifying the correctness of `llm_predicted_label`.
* ‘`is_label_correct`*’* is a boolean flag indicating whether the `llm_predicted_label` is to be considered correct (True) or incorrect (False).
* ‘`predicted_label`’ and ‘`prediction_probability`’ represent DQC Toolkit’s predicted label for a given sample and the corresponding probability score.
We leverage `is_label_correct` to identify reliably labelled samples
```python
train_data_curated = train_data_curated.loc[train_data_curated['is_label_correct']].reset_index(drop=True)
```
### Step 3 — Fine-tune LLM using Reliably Labelled Data
We fine-tune the LLM Using _`train_data_curated`_ with `llm_predicted_label` as the target variable. First, we map the integer labels to text labels for LLM interpretability.
```python
train_data_curated['llm_predicted_label_text'] = train_data_curated['llm_predicted_label'].map(label_to_text)
```
Next, we transform the data into instruction prompts for better performance
```python
prompt_template = "<s>[INST] You are a helpful, respectful and honest assistant. Choose one option that best describes the emotion behind the given utterance based on the following comma separated options: " + emotion_list_str + "[/INST] </s>"
label_column = 'llm_predicted_label_text'
train_data_curated_ds = build_LLM_prompt(train_data_curated, with_label=True, label_column=label_column)
train_data_curated_ds = train_data_curated_ds.map(lambda example, prompt_template=prompt_template : {'emotion_prompt' : prompt_template + example['emotion_prompt']})
```
Then, we define the LLM fine-tuning function
```python
from peft import get_peft_model, LoraConfig, PeftConfig, PeftModel, prepare_model_for_kbit_training
from tqdm import tqdm
from transformers import (AutoModelForCausalLM, AutoTokenizer,
BitsAndBytesConfig, DataCollatorForLanguageModeling,
pipeline, Trainer, TrainingArguments
)
import bitsandbytes as bnb
import torch.nn as nn
def tokenize(example: datasets.formatting.formatting.LazyRow, tokenizer: AutoTokenizer ) -> dict:
"""Util function to tokenize text data
Args:
example (datasets.formatting.formatting.LazyRow): Batch of samples containing text to tokenize.
tokenizer (AutoTokenizer): Tokenizer object used for tokenization.
Returns:
dict: Dictionary containing tokenized text.
"""
tokenized = tokenizer(
example['emotion_prompt'],
truncation=False
)
return {**tokenized}
def finetune_LLM(base_model_name: str, train_ds: Dataset,
save_path: str, seed: int, batch_size: int = 64, num_epochs: int = 1):
"""Function to fine-tune an LLM on the given input training data
Args:
base_model_name (str): The name or path of the LLM model to be fine-tuned
train_ds (Dataset): Input dataset containing text prompts.
save_path (str): Path to save the trained model
seed (int): Random seed for reproducibility
batch_size (int, optional): Batch size to use during training. Defaults to 64.
num_epochs (int, optional): Number of training epochs. Defaults to 1.
"""
bnb_config = BitsAndBytesConfig(
load_in_4bit=True,
bnb_4bit_use_double_quant=False,
bnb_4bit_quant_type="nf4",
bnb_4bit_compute_dtype=torch.float16
)
model = AutoModelForCausalLM.from_pretrained(base_model_name,
quantization_config=bnb_config,
device_map="auto")
tokenizer = AutoTokenizer.from_pretrained(base_model_name, padding_side="left")
tokenizer.pad_token = tokenizer.eos_token
train_ds = train_ds.map(
tokenize,
batched=False,
fn_kwargs={"tokenizer": tokenizer},
)
model = prepare_model_for_kbit_training(model)
peft_config = LoraConfig(
lora_alpha=16,
lora_dropout=0.1,
r=64,
bias="none",
task_type="CAUSAL_LM",
)
args = TrainingArguments(
disable_tqdm=False,
output_dir=save_path,
warmup_steps=1,
per_device_train_batch_size=batch_size,
num_train_epochs=num_epochs,
learning_rate=2e-4,
fp16=True,
optim="paged_adamw_8bit",
logging_dir="./logs",
save_strategy="no",
evaluation_strategy="no",
report_to=None
)
model = get_peft_model(model, peft_config)
model.config.use_cache = False
trainer = Trainer(
model=model,
train_dataset=train_ds.select_columns(['input_ids', 'attention_mask']),
eval_dataset=None,
args=args,
data_collator=DataCollatorForLanguageModeling(tokenizer, mlm=False),
)
trainer.train()
trainer.model.save_pretrained(save_path)
return
```
Finally, we are ready to fine-tune the model. The number of training epochs is set to 1 and batch size is set to 64.
```python
model_name = "mistralai/Mistral-7B-Instruct-v0.2"
finetuned_model_path = "selftrained-mistral-emotion"
finetune_LLM(model_name, train_data_curated_ds, save_path=finetuned_model_path, seed=seed)
```
The fine-tuned model is stored in your working directory under the folder ‘**selftrained-mistral-emotion**’
### Test the Self-Trained Model’s Performance
We run the inference with the fine-tuned model using the same function `run_llm` as we did for the ICL baseline.
```python
text_to_label = {v: k for k, v in label_to_text.items()}
LLM_emotion_list = emotion_list + ['no_match']
_, score = run_llm(val_data, prompt_template, model_name, LLM_emotion_list, text_to_label,
finetuned_model_path=finetuned_model_path, batch_size=64)
print(score)
```
There’s a **29.41%** improvement in the F1-score (from **0.442** to **0.572**). The number of “*no\_match*” predictions have also drastically reduced. And we didn’t have to label any data manually !
The following plot summarizes our results visually —
Performance of Mistral 7B in Text Classification using Emotion dataset with Minimal Labelled Data
## Further Experimental Validation
**Additional LLM** — To verify the reproducibility of our observations with Mistral-7B, we run experiments with Llama3–8B as well.
**Additional Dataset** — We also include the MTOP domain dataset where LLM ICL is known to perform well in general. This helps us understand if our approach is capable of achieving improvements when LLMs are already doing a reasonable job.
We re-run our experiments with the new LLM and dataset. The code for these experiments can be found [here](https://github.com/sumanthprabhu/DQC-Toolkit/tree/main/notebooks/self-training-using-dqc-toolkit). Following are the results —
The first plot from the left shows LLama3–8B’s performance in Text Classification with the Emotion dataset using ICL. The observations are similar to Mistral-7B experiment. The results with ICL are poor (F1-score of **0.365**) and there is a **49.86%** improvement in the F1-score after Self-Training using DQC Toolkit (F1 score of **0.547**).
With MTOP Domain, both the LLMs perform well with ICL. As shown in the second and third plot, ICL with Mistral-7B and Llama3–8B achieve F1-scores of **0.9** and **0.88** respectively. Post Self-Training using DQC Toolkit, Mistral-7B scores **0.916** while Llama3–8B scores **0.938**. Essentially, we observe a **1.78%** improvement with Mistral-7B and a **6.59%** improvement with Llama3–8B.
## In a Nutshell
We observe that Self-Training using DQC Toolkit improves the ICL performance of both Mistral-7B and Llama3–8B for both Emotion and MTOP Domain datasets in Text Classification.
## Similarity to “Teacher-Student” Learning
Self Training can be considered a special case of “[Teacher-Student](https://arxiv.org/abs/2210.17332)” framework where the Teacher model is an LLM and the Student model is the same LLM. In practice, you would want to explore a Student model that is more cost effective when it comes to deployment. Similar to what we’ve seen in this article, we can bootstrap smaller models using LLM ICL predictions to achieve improved performance. We leave this discussion for future posts.
> Currently, DQC Toolkit supports text classification (binary/multi class) problems with various parameter customization options. The plan is to enhance it further by adding more capabilities. Any form of feedback / support will be much appreciated ! Following is the link to the repo.
{% github sumanthprabhu/DQC-Toolkit %}
PS - If you found this helpful, it would be great if you could give the repo a shout out.
## Thank you for reading
Passionate about Machine Learning? Please feel free to add me on [Linkedin](https://www.linkedin.com/in/sumanth-prabhu/) | sumanthprabhu |
1,878,830 | Timeless Elegance: Crystal Chandeliers for Classic Homes | screenshot-1717390648303.png Timeless Elegance: Crystal Chandeliers for Classic... | 0 | 2024-06-06T06:34:55 | https://dev.to/ronald_woodgo_ba03f686524/timeless-elegance-crystal-chandeliers-for-classic-homes-24n0 | design |
screenshot-1717390648303.png
Timeless Elegance: Crystal Chandeliers for Classic Homes
Introduction:
If you want to make your home look more elegant and luxurious, the best option is to buy a crystal chandelier. Crystal chandeliers have been used for centuries to add a touch of class to any room. They are timeless, elegant, and classic. We will explore the advantages of crystal chandeliers, the innovation used to create them, how to use and take care of them, their safety features, and the black chandelier quality of the services provided.
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Keeping the chandelier is simple
You should make usage of a cloth or perhaps a duster like feather totally clean the crystalline chandelier, and acquire far from utilizing detergents which are harsh which will harm the chandelier
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Conclusion:
There is no better way to add elegance and glamour to your home than by installing a timeless and elegant crystal chandeliers. They are timeless, elegant, and classic and offer a wide range of advantages. Crystal chandeliers are now available with modern designs that cater to different preferences and modern living styles. They require proper use and maintenance to ensure they last a lifetime. You should also ensure that the company providing the chandelier offers excellent after-sales services and provides a warranty. Choose a crystal chandelier today and experience the elegance and sophistication it can bring to your home.
| ronald_woodgo_ba03f686524 |
1,878,828 | A Comprehensive Guide to Game Art Outsourcing for Smooth Collaboration | Outsourcing game art involves hiring external art studios or freelancers to develop the visual assets... | 0 | 2024-06-06T06:31:33 | https://dev.to/ediiie/a-comprehensive-guide-to-game-art-outsourcing-for-smooth-collaboration-3kh8 | gamedev, gaming | Outsourcing game art involves hiring external art studios or freelancers to develop the visual assets for your game, as opposed to creating them in-house.
When you choose to outsource, you gain access to a wide array of visual elements, including:
- 3D character design
- Environment modeling
- UX and UI design
- Character animation
- Texture and material design, and more.
This blog post aims to answer all your questions and address any uncertainties about [game art outsourcing](https://www.ediiie.com/blog/game-art-outsourcing/): what it entails, its importance, various approaches, and more. | ediiie |
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