A naukri.com initiative
Javascript
Dev
3w
408
Image Credit: Dev
Daily JavaScript Challenge #JS-197: Validate Palindrome Number
- Daily JavaScript Challenge #JS-197: Validate Palindrome Number
- Write a function that checks if a given integer is a palindrome, meaning it reads the same backward as forward.
- Function should return true if the number is a palindrome, and false otherwise.
- Join the Daily JavaScript Challenge for more coding practice and learning opportunities.
Read Full Article
24 Likes
Medium
3w
324
Image Credit: Medium
5 Common JavaScript mistakes and how to avoid them
- JavaScript has its pitfalls that developers often encounter while working with it.
- Avoid using var for variable declarations due to its function or global scope; opt for let and const instead.
- When assigning object or array to new variables, be cautious of mutating the original variable; use the spread operator for this purpose.
- To handle the confusion around 'this' in JavaScript, prefer using arrow functions as they use this from the place where they were written.
- Use === (strict equality) over == for comparing values in JavaScript to avoid type coercion.
- Combat callback hell by utilizing promises and async/await to make asynchronous code more readable and maintainable.
Read Full Article
19 Likes
Medium
3w
364
Image Credit: Medium
What Happens in JavaScript When You Reassign an Imported Binding
- JavaScript modules handle imports differently than local variables, creating live connections between files.
- ECMAScript Modules (ESM) maintain live references to exported variables, updating values across files.
- Reassigning imported bindings in ESM is prohibited to maintain the module structure.
- Live bindings in ESM dynamically reflect changes in the original source, ensuring synchronization.
- In contrast, CommonJS modules export objects, not live references, resulting in static data imports.
- In CommonJS, reassignment of imported bindings is allowed, impacting the shared object's properties directly.
- However, CommonJS lacks automatic synchronization across files like ESM, requiring manual handling for shared state.
- ESM's structured system enforces read-only imported bindings, highlighting the differences between ESM and CommonJS.
- Understanding how JavaScript manages imported bindings between modules helps prevent unexpected behaviors in code.
- ESM provides a more controlled and synchronized approach to handling modules, while CommonJS offers more flexibility with potential for shared state inconsistencies.
Read Full Article
21 Likes
Dev
3w
149
Image Credit: Dev
"The Untold Secret Behind JavaScript's Flexibility: Lexical Scope and Closures Revealed"
- JavaScript's flexibility is powered by concepts like lexical scoping and closures.
- Lexical scoping determines variable scope by position in source code, enabling access to outer function variables from inner functions.
- Closures allow functions to retain access to outer function variables even after the function has returned.
- Understanding lexical scoping and closures is essential for writing elegant and efficient JavaScript code.
Read Full Article
8 Likes
Dev
3w
26
Image Credit: Dev
Day-23 I Built a Colorful Random Number Guessing Game with JavaScript!
- A developer built a Random Number Game using HTML, CSS, and JavaScript.
- The game generates a random number between 1 and 10, allowing players 10 chances to guess it right.
- If a player guesses right, they win, while each incorrect guess reduces their score by 1.
- The project showcases the use of Math.random(), Math.floor(), DOM manipulation, event handling, and styling with CSS gradients and animations.
Read Full Article
1 Like
Dev
3w
158
Image Credit: Dev
Real-Time Messaging with Go and JavaScript
- WebSockets enable real-time communication between frontend and backend without HTTP delays.
- The tutorial demonstrates creating a real-time chat application using Go on the backend and JavaScript on the frontend.
- The backend setup involves Go server handling WebSocket connections by upgrading HTTP connections and echoing received messages.
- The frontend code consists of HTML and JavaScript for sending and receiving messages instantly via WebSocket, opening possibilities for various real-time applications.
Read Full Article
9 Likes
Dev
3w
303
Image Credit: Dev
🧒🍬 Beginner-Friendly Guide to Solving "Distribute Candies Among Children" | LeetCode 135 Explained (C++ | JavaScript | Python)
- LeetCode 135 - Candy problem involves distributing candies to children based on their ratings in a line, following certain rules.
- The problem requires each child to receive at least one candy and a child with a higher rating than adjacent child gets more.
- Two strategies discussed in the guide are a naive two-pass greedy approach and an optimized greedy algorithm.
- The optimized greedy solution reduces space complexity from O(n) to O(1) by tracking peaks, valleys, and previous candies given.
- Code implementations provided in C++, JavaScript, and Python demonstrate the optimized approach.
- Test cases cover various scenarios to validate the correctness of the implemented solutions.
- Key takeaways include understanding the intuition behind both approaches and the significance of optimizing space for large datasets.
- Overall, mastering this problem helps in grasping greedy algorithms and efficient space utilization in coding interviews and DSA practice.
Read Full Article
18 Likes
Dev
3w
74
Image Credit: Dev
Daily JavaScript Challenge #JS-196: Transform All Vowels to Uppercase in a String
- Daily JavaScript Challenge: Transform All Vowels to Uppercase in a String
- Create a function that changes lowercase vowels to uppercase in a given string while leaving other characters unchanged.
- Difficulty: Easy, Topic: String Manipulation
- Join the daily coding challenge to improve your programming skills and share your solutions and approaches.
Read Full Article
4 Likes
Dev
3w
237
Image Credit: Dev
A Voyage through Algorithms using Javascript - Quick Sort
- Quick Sort is a widely-used sorting algorithm known for its efficiency in computer science.
- It follows a 'divide and conquer' approach by selecting a 'pivot' element and partitioning the array around it.
- Quick Sort has an average-case time complexity of O(n log n) and is capable of in-place sorting.
- However, its performance can degrade to O(n²) in worst-case scenarios, emphasizing the importance of pivot selection.
- The algorithm recursively sorts sub-arrays on both sides of the pivot until everything is organized.
- Quick Sort implementation in JavaScript involves selecting a pivot, partitioning, and recursive sorting.
- The algorithm works by creating an invisible boundary and organizing elements in-place within the same array.
- Quick Sort is not stable and can change the relative positions of equal elements during partitioning.
- Its performance heavily depends on pivot selection, with good pivots leading to balanced partitions and optimal performance.
- Advantages of Quick Sort include excellent average-case performance, in-place sorting, and cache efficiency.
- Quick Sort is suitable for general-purpose sorting, memory-constrained environments, and performance-critical applications.
Read Full Article
14 Likes
Medium
3w
21
Image Credit: Medium
Native Stream Handling with JavaScript Web Streams API
- The Web Streams API in JavaScript provides a way to handle data piece by piece, which is useful for real-world applications where data arrives incrementally.
- Before the Web Streams API, stream handling in JavaScript was inconsistent between Node and browser environments.
- The API standardizes stream handling with ReadableStream, WritableStream, and TransformStream, working seamlessly across browsers, Node, and Deno.
- Readable streams allow control over the flow of data, with a queuing strategy and backpressure management.
- Writable streams handle data writing to destinations, managing queues and backpressure efficiently.
- Connecting readable and writable streams, and adding transforms in between, allows for building multi-step processing systems easily.
- The Web Streams API is widely supported in modern browsers without the need for polyfills, facilitating streaming operations in web applications.
- Newer versions of Node also support the Web Streams API, making it easier to develop applications that run on both the client and server sides.
- Streams can be utilized for various tasks like working with network responses, decoding data, handling compressed files, and more.
- Custom stream pipelines can be built for specific data processing tasks, providing flexibility and efficiency in handling data incrementally.
Read Full Article
1 Like
Medium
3w
378
Image Credit: Medium
Mastering JavaScript: DOM, Events, and ES6+ Features
- JavaScript is essential for web development, allowing control and updating of webpage content without reloading the page.
- The DOM (Document Object Model) is a tree-like structure that JavaScript interacts with to change webpage elements.
- JavaScript can change content, styles, add or remove elements, and react to user actions using the DOM.
- Event handling in JavaScript allows websites to feel interactive and responsive by responding to user actions.
- addEventListener() method is used to handle events in JavaScript, making webpages respond instantly to user input.
- Asynchronous JavaScript complements event handling to keep web apps responsive while dealing with time-consuming tasks.
- Async/Await, Promises, and Callbacks are tools in JavaScript for managing asynchronous behavior efficiently.
- ES6+ features like Arrow Functions, Destructuring, Spread and Rest Operators enhance JavaScript for more concise and powerful code.
- JavaScript's modern enhancements make code cleaner and more intuitive, enabling efficient handling of real-world tasks.
- JavaScript is crucial for web development, mastering its features and tools is essential for developers of all levels.
Read Full Article
22 Likes
Medium
3w
317
Image Credit: Medium
Event Timing Tricks That Only Work in JavaScript Microtasks
- JavaScript runs everything on a single thread, managed by the event loop which processes tasks and microtasks in a specific order.
- Tasks like setTimeout callbacks go to the task queue, while microtasks like Promise .then() callbacks go to the microtask queue.
- Microtasks have higher priority and are executed before tasks, allowing for nested microtasks and timely execution of Promise callbacks.
- Async operations like await utilize microtasks, pausing functions briefly and resuming with microtasks for responsive behavior.
- Microtasks offer a way to delay operations without actual waiting, ensuring timely execution within the JavaScript event cycle.
- Chaining microtasks enables breaking down work into smaller steps for efficient processing without freezing the browser.
- By using microtasks, developers can keep related logic closely grouped, ensuring correct sequencing without reliance on delays.
- Microtasks provide a lightweight method to maintain order of operations and quick follow-ups without interference from external events.
- Utilizing microtasks allows for precise timing control and execution sequencing within JavaScript, optimizing performance.
- Microtasks leverage the JavaScript event loop structure to prioritize and efficiently handle asynchronous operations and tasks.
Read Full Article
19 Likes
Dev
3w
61
Image Credit: Dev
How I Built a DApp Using PHP, Solidity, and JavaScript on Binance Smart Chain (With Dockerized Deployment)
- A developer shares their experience building a DApp using PHP, Solidity, and JavaScript on Binance Smart Chain, with Dockerized deployment.
- They utilized PHP for backend logic, JavaScript for frontend UI, and Solidity for smart contracts on BSC.
- Smart contracts were written in Solidity, tested with Hardhat, and deployed to the BSC Testnet.
- The backend handled wallet signature verification, API endpoints, and interacted with blockchain nodes using ext-curl.
- Docker & Docker Compose were used for containerizing the backend, with provided Dockerfile and Docker Compose setups.
- Frontend interactions were made using Web3.js, connecting to MetaMask and reading data from the deployed contract on BSC.
- Deployment options included AWS EC2/ECS, GCP Cloud Run, DigitalOcean App Platform, and Kubernetes with Helm charts.
- Future steps involve integrating NFTs with ERC-721, adding WalletConnect support, and implementing CI/CD with GitHub Actions.
- Key lessons learned include the effectiveness of PHP in Web3 projects, the benefits of Docker for consistency, and the advantages of BSC for dApps.
- The developer invites connections and feedback, sharing their LinkedIn and GitHub profiles for further engagement.
Read Full Article
3 Likes
Medium
3w
277
Image Credit: Medium
How I Earned My First $1,000 With Just JavaScript
- The author shares how they earned their first $1,000 with JavaScript by solving problems for others step by step.
- Started by picking a niche to solve problems, offering skills for free initially to build trust, and then turning free projects into paid work.
- Once established, the author productized their knowledge by creating downloadable tools and showcasing them on platforms like IndieHackers and Twitter.
- Key lessons learned include not waiting to start, beginning with small projects, and emphasizing value over complex code explanations.
Read Full Article
16 Likes
Dev
3w
66
Image Credit: Dev
A Case for Semicolon-less JavaScript (ASI)
- Experienced developers prefer using semi-columns in JavaScript to reduce bugs in poorly maintained code bases and provide clearer intent.
- A case for semicolon-less JavaScript argues that automatic semicolon insertion (ASI) can be beneficial for code readability and maintenance in version control history.
- Maintaining blame and version control history is crucial for code quality, but semi-columns can cause issues in certain patterns like the builder pattern or functional programming.
- Semicolon-less JavaScript can prevent unintended blame in Git diffs and make code changes more descriptive and easier to track in certain scenarios.
Read Full Article
3 Likes
For uninterrupted reading, download the app