How to Rotate a Matrix by 90° in JavaScript

Struggling with asynchronous JavaScript? 🤔 You're not alone! The Node.js Event Loop can seem like a black box, but understanding it is KEY to writing efficient code. Here's the breakdown: 👉 Understanding the V8 engine and libUV is CRUCIAL. 👉 Differentiate between BLOCKING vs NON-BLOCKING I/O. Choose wisely for optimal performance. ⚙️ 👉 Know when to use setImmediate vs setTimeout(0). Hint: it's not always about the timing! ⏰ What are your biggest challenges with asynchronous programming in Node.js? Let's discuss in the comments! 👇 #Nodejs #Javascript #AsyncAwait #EventLoop #BackendDevelopment #Programming #V8

If you only had 2 hours a week to learn JavaScript, what would you do? Here’s what actually works: 1️⃣ Review what you learned last week. 2️⃣ Complete the next CSX unit. 3️⃣ Join a free Beginner Study Group to practice with others. Start free on https://lnkd.in/eNshGh4b and take your first JavaScript lesson today. You’ll write real code in your browser and see instant results.🌱 #javascript #coding #webdevelopment #csx #datatypes

𝗥𝗲𝗮𝗰𝘁 𝟭𝟵.𝟮 𝗷𝘂𝘀𝘁 𝗮𝗱𝗱𝗲𝗱 "𝘂𝘀𝗲 𝗻𝗼 𝗺𝗲𝗺𝗼" 💀 Finally, a directive that tells React: "Hey compiler, I know what I'm doing. Stop helping me." It's like putting "DO NOT OPTIMIZE" on a function. When you'd actually use this: → Never (probably) → Debugging weird performance issues → Your function has side effects React shouldn't cache → You enjoy living dangerously Most devs will never touch this. But knowing it exists? That's the flex. 💪 Anyone else excited about features they'll add "just in case" and never actually use? #React #WebDev #JavaScript #Programming

 • React doesn't memoize.  • You memoize manually with React.memo, useMemo(), useCallback()  • React introduces React Compiler that does memoization automatically  • React Compiler comes with "use no memo" directive that says 'Do not optimize this function for me'😭😭😭😭😭

𝗥𝗲𝗮𝗰𝘁 𝟭𝟵.𝟮 𝗷𝘂𝘀𝘁 𝗮𝗱𝗱𝗲𝗱 "𝘂𝘀𝗲 𝗻𝗼 𝗺𝗲𝗺𝗼" 💀 Finally, a directive that tells React: "Hey compiler, I know what I'm doing. Stop helping me." It's like putting "DO NOT OPTIMIZE" on a function. When you'd actually use this: → Never (probably) → Debugging weird performance issues → Your function has side effects React shouldn't cache → You enjoy living dangerously Most devs will never touch this. But knowing it exists? That's the flex. 💪 Anyone else excited about features they'll add "just in case" and never actually use? #React #WebDev #JavaScript #Programming

🚀 Did you know? In JavaScript, setTimeout(..., 0) doesn’t actually run immediately. It runs after all Promises and await calls — even if the delay is 0ms 🧠 Why? Because JS runs all microtasks (like Promises and await) before moving on to macrotasks (like setTimeout, setInterval, etc.). 💡 Takeaway: Understanding the event loop helps you fix async bugs and write smoother, predictable code. #JavaScript #Coding #WebDevelopment #EventLoop #AsyncProgramming #CodeTips #Developers #Learning #letsLearnWithPrateek #Day7 Here’s proof 👇

🚀 JavaScript Tip of the Day – Find Duplicate Values in an Array Efficiently! Today I worked on a simple but powerful logic to detect duplicate elements in an array using ES6 Sets. This approach is clean, fast, and avoids unnecessary loops. 🔍 What this does: Tracks seen values Captures duplicates only once Converts the result back to an array ✨ Output: [2, 3] Small logic, big impact! #JavaScript #Coding #WebDevelopment #100DaysOfCode #LearnEveryday

Keyboard Events in JavaScript Keyboard events make web pages more interactive by detecting when users press or release keys. These events help in creating shortcuts, form controls, and smooth navigation experiences. ✨The three main keyboard events are: 🔹keydown – triggered when a key is pressed. 🔹keypress – triggered while the key is held down (mostly for character keys). 🔹keyup – triggered when the key is released. #JavaScript #WebDevelopment #Coding #WebDesign #FrontendDevelopment #Stemup

Want to learn JavaScript by doing, not just watching. 💻 Here is why people stick with it • Short lessons you can actually finish • Write code in the browser and see it run right away • Little challenges that turn into real habits • Free modules and a friendly community when you need a hand It feels practical, supportive, and kind of fun Jump in today and tell us how it felt. Start free on CSX → https://lnkd.in/eRNMVDh2 #javascript #coding #webdevelopment #csx #datatypes

🎯 How Online Exams Detect Malpractice Using JavaScript! Ever wondered how online exams instantly terminate when you switch tabs or click outside the window? 💻 In this video, I’ve explained how simple JavaScript events like visibilitychange and blur work behind the scenes to detect user activity and prevent cheating in online assessments. This concept is widely used in real-world exam portals to maintain integrity and ensure fair testing environments. #JavaScript #WebDevelopment #OnlineExams #TechExplained #Programming #Frontend #CodingConcepts #Developers