What is Unit Testing?

Unit testing involves testing the smallest functional units of code in a software application to ensure they perform as expected. This practice is crucial for maintaining code quality and often involves writing code in small, functional units followed by creating corresponding unit tests.

? How Unit Tests Work

• Planning and Setting Up the Environment: Developers identify which units of code need to be tested and determine how to execute all relevant functionalities of each unit to test it effectively.
• Writing Test Cases and Scripts: Developers write the unit test code and prepare scripts to execute the tests.
• Executing the Unit Tests: The unit tests run and reveal how the code behaves for each test case.
• Analyzing the Results: Developers analyze the results to identify errors or issues in the code and fix them.

*? Benefits of Unit Testing*

• Early Issue Detection: Catches and fixes issues early, preventing larger problems.
• Improved Code Quality: Ensures each unit meets requirements, enhancing overall quality.
• Increased Confidence: Validates functionality, boosting developer confidence.
• Faster Development: Speeds up validation of code changes.
• Better Documentation: Clearly documents code behavior for easier maintenance.

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JavaScript Code Challenges for Beginners

1. Print all even numbers from 0 – 10

Write a function that prints all even numbers between 0 and 10. This helps beginners understand basic looping and conditional logic.

2. Print a table containing multiplication tables

Generate and print multiplication tables from 1 to 10 using nested loops. This reinforces nested loops and helps in structuring and formatting output.

3. Create a length converter function

Create a function that converts a length from kilometers to miles. This introduces functions and demonstrates unit conversion through mathematical operations.

4. Calculate the sum of numbers within an array

Write a function to calculate the sum of all numbers in an array. This teaches iterating over arrays and accumulating values, a common task in data processing.

5. Create a function that reverses an array

Create a function that takes an array and returns a new array with elements in reverse order. This helps understand array manipulation and indexing.

6. Sort an array from lowest to highest

Write a function to sort an array of numbers in ascending order. This introduces sorting algorithms and teaches using built-in methods to manipulate data.

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5 Key Habits for Software Developers

1. Write Clean, Reusable Code

Writing clean, reusable code is fundamental. It makes your codebase easier to read, maintain, and test.
⭐️ "Code is like humor. When you have to explain it, it’s bad." – Cory House

2. Begin With the End in Mind

Starting a project with a clear vision of the final goal ensures that you stay focused and aligned with the project's objectives.
⭐️ "If you don’t know where you are going, you’ll end up someplace else." – Yogi Berra

3. Be a Persistent Problem-Solver

Persistence is key in development. Problems will arise, and challenges will come, but your ability to persist and find solutions is what sets you apart.
⭐️ "It’s not that I’m so smart, it’s just that I stay with problems longer." – Albert Einstein

4. Stay Open to New Things

Technology evolves rapidly. Staying open to new tools, languages, and methodologies ensures that you remain relevant and competitive.
⭐️ "The illiterate of the 21st century will not be those who cannot read and write, but those who cannot learn, unlearn, and relearn." – Alvin Toffler

5. Put First Things First

Prioritization is crucial. By identifying what is important and focusing on it first, you can manage your time more effectively and ensure that the most critical tasks are completed.
⭐️ "The key is not to prioritize what’s on your schedule, but to schedule your priorities." – Stephen Covey

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What is Socket?

A socket is one endpoint of a two-way communication link between two programs running on a network. The socket mechanism provides a means of inter-process communication by establishing named contact points through which the communication takes place.

*? Difference Types of Sockets*

• TCP: TCP is the most commonly used protocol on the internet. When you want to see a particular web page, your computer sends packets of data to the web address, requesting it to send the web page to you.
• UDP: UDP is similar to TCP as it sends packets of data, but it does not check for errors in the packets, eliminating bidirectional communication.
• WebSockets: WebSockets provide full-duplex communication over a single TCP connection that can support any protocol. It starts with an HTTP handshake, interpreted as an HTTP upgrade request.

*? Uses of Sockets*

• Websites: Sockets can be used on websites to enable real-time features such as live chat, notifications, live updates, and interactive experiences.
• Email: For communication between email clients and servers via SMTP, IMAP, and POP3.
• File Transfer: FTP servers use sockets to send and receive files.
• Real-time Communication: For applications like chat apps, VoIP, and online gaming.
• Remote Management: SSH and other remote management tools.

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Next.js + GraphQL

Next.js provides a robust framework for building React applications with server-side rendering and static site generation, while GraphQL offers a flexible and efficient way to interact with your API. Combining these technologies can result in highly performant and scalable web applications!

Next.js and GraphQL together create a completely type-safe end-to-end solution for Next.js applications.

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NextJS + GraphQL Blueprint: Professional Grade Setup

We'll use NextJS, Apollo Server Micro, Type GraphQL, GraphQL Code Generation, react-query and graphql-request to make a completely type safe end-to-end GraphQL solution for NextJS applications. Code: https://github.com/jherr/next-gql-dogs Humane Society…

GitHub Repos to Master React

*? React+TypeScript Cheatsheets*

• Repository: typescript-cheatsheets/react
• Description: Cheatsheets for experienced React developers getting started with TypeScript.

*?React Use*

• Repository: streamich/react-use
• Description: A collection of essential React Hooks for building robust and scalable applications.

*?React Interview Questions & Answers*

• Repository: sudheerj/reactjs-interview-questions
• Description: A list of frequently asked React interview questions and their answers to help you prepare for technical interviews.

*?Ahooks*

• Repository: alibaba/hooks
• Description: A high-quality & reliable React Hooks library.

*?Beautiful React Hooks*

• Repository: antonioru/beautiful-react-hooks
• Description: A collection of beautiful and (hopefully) useful React hooks to speed-up your components and hooks development.

*?React Coding Challenges*

• Repository: alexgurr/react-coding-challenges
• Description: A series of React coding challenges with a variety of difficulties to improve your coding skills.

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React Roadmap from Beginner to Advanced

Intermediate Level:

1. Hooks:

• Enhance your understanding and application of React Hooks (useState, useEffect, useContext, etc.).
• Convert class components to functional components using hooks.

2. Context API:

• Understand the purpose and benefits of the Context API.
• Learn to create and use context providers and consumers.

3. Redux:

• Understand the principles of Redux for state management.
• Implement Redux in a React application.

4. Middleware and Async Operations:

• Learn about middleware in Redux.
• Handle asynchronous operations using middleware like Redux Thunk.

5. API Calls in React:

• Learn how to fetch data from APIs using tools like fetch or libraries like Axios.

6. Error Handling:

• Learn to use error boundaries to catch JavaScript errors anywhere in the component tree.

7. Testing in React:

• Understand the basics of Jest for unit testing.
• Learn to test React components in a user-centric way.
• Write tests for components, hooks, and Redux logic.

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Steps To Prepare for Your Coding Interview ?*✨***

Step 1: Review common technical terms

Create flashcards for key terms. Ensure you understand both definitions and practical applications to discuss them confidently.

Step 2: Research the company

Research the company's work, systems, and coding preferences. This is crucial for coding challenges and shows genuine interest.

Step 3: Prepare to share your projects

Select 2-3 significant projects. Use the STAR method (Situation, Task, Action, Result) to explain the problem, approach, technologies, challenges, and outcomes.

Step 4: Practice algorithm questions

Practice algorithms like binary searches, binary trees, and arrays. Use online platforms to improve your foundational knowledge and problem-solving speed.

Step 5: Review common interview questions

Prepare answers for both technical and behavioral questions using the STAR method. Regular practice will boost your confidence.

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