Mastering setInterval() with LeetCode's Interval Cancellation challenge

Day 12 of #30DaysOfJavaScript on LeetCode Today's Challenge: 2723 — Add Two Promises Today’s problem was all about working with asynchronous operations in JavaScript — specifically how to handle multiple promises efficiently. Here’s my solution 👇 var addTwoPromises = async function(promise1, promise2) { const [a, b] = await Promise.all([promise1, promise2]); return a + b; }; This challenge reinforced how Promise.all() allows us to run promises in parallel, waiting for all of them to resolve before proceeding — a key concept in optimizing asynchronous workflows. It’s a clean and elegant way to handle multiple async tasks without unnecessary delays. Try it out here: https://lnkd.in/g6WC5mu7 #JavaScript #LeetCode #CodingChallenge #LearningJourney #30DaysOfCode #AsyncAwait #Promises #Programming #Developers #Learning

🚀 Callback Hell in JavaScript: The “Pyramid of Doom”! In JavaScript, Callback Hell happens when multiple asynchronous functions are nested inside each other, creating deeply indented code that’s hard to read, debug, and maintain. 😩 ✅ How to avoid it: Use Promises to flatten nested callbacks Use async/await for clean, readable code Modularize your logic into smaller functions #JavaScript #WebDevelopment #CallbackHell #AsyncAwait #Promises #CodingTips #FrontendDevelopment #WebDevelopers #CleanCode #Programming #LearnToCode #CodeSmarter #DeveloperCommunity

Day 8 of #30DaysOfJavaScript on LeetCode Today's challenge: 2629 — Function Composition The task was to implement a function that takes an array of functions [f1, f2, f3, ..., fn] and returns a new function that represents their composition. In simple terms, the composed function should apply all the given functions from right to left, just like: f(g(h(x))) Here’s my solution 👇 var compose = function(functions) { return function(x) { let res = x; for (let i = functions.length - 1; i >= 0; i--) { res = functions[i](res); } return res; } }; This challenge gave me a deeper understanding of how function chaining and composition work in JavaScript — building complex logic from smaller, reusable functions. It’s a beautiful example of how functional programming principles simplify problem-solving! Try it out here : https://lnkd.in/g6WC5mu7 #JavaScript #LeetCode #CodingChallenge #LearningJourney #30DaysOfCode #Functions #Callbacks #Programming #Composition

⚙️ Parallel vs Series Function Calls in JavaScript When I first started working with async code, I used to call every function one after another — and wondered why my APIs felt slow. 😅 That’s when I learned the difference between series and parallel execution. 💡 Series Execution Each function waits for the previous one to finish. 𝚊𝚠𝚊𝚒𝚝 𝚝𝚊𝚜𝚔𝟷(); 𝚊𝚠𝚊𝚒𝚝 𝚝𝚊𝚜𝚔𝟸(); 𝚊𝚠𝚊𝚒𝚝 𝚝𝚊𝚜𝚔𝟹(); ✅ Easier to debug ❌ Slower — total time = sum of all durations 💡 Parallel Execution All functions start together and resolve independently. 𝚊𝚠𝚊𝚒𝚝 𝙿𝚛𝚘𝚖𝚒𝚜𝚎.𝚊𝚕𝚕([𝚝𝚊𝚜𝚔𝟷(), 𝚝𝚊𝚜𝚔𝟸(), 𝚝𝚊𝚜𝚔𝟹()]); ✅ Much faster — total time = time of the longest task ❌ Harder to manage dependencies or shared state 🧠 When to use what: Use series when tasks depend on each other i.e you use the results from the previous function into the next one. Use parallel when tasks are independent and the system ypu are calling can take multiple request at once. Choosing the right execution model isn’t about speed alone — it’s about knowing how your tasks relate to each other. #javascript #async #webdevelopment #backend #programming #learning

Ever felt like JavaScript is secretly trolling you? 😅 Variables popping out of nowhere, functions remembering things they shouldn’t, and hoisting acting like a magician 🎩🐇 I just dropped a fun blog: 🧠 “Var, Let’s Go! JS Scopes & Closures” I broke down some of the most confusing JS concepts — Lexical Scope Function vs Block Scope Closures (with secret agents 🕵️♂️) Hoisting (aka JS’s magic trick) Explained with humor, analogies, and memes — because learning JS shouldn’t feel like debugging production code. 😬 📖 Read it here: https://lnkd.in/gtKXeQJu #JavaScript #WebDevelopment #CodingHumor #Programming #Beginners

Tired of JavaScript fundamentals feeling fuzzy? 🤯 If concepts like Hoisting, Closures, and Prototypes slow you down, you need a clearer reference. I've distilled the core structure rules of the language into Cheat Sheet Part 1: JavaScript Static Core for developers. Quickly Master: - Scope & TDZ: Variable boundaries (let/const vs var). - Hoisting Logic: What the engine really moves. - Closures: How functions create private memory. - Prototypes: The true foundation of JS inheritance. Stop guessing, start coding with confidence. ➡️ View the attached PDF now to get your free copy! 💾 #JavaScript #WebDevelopment #CodingTips #Programming #CheatSheet

Day 26 – Understanding Scope, Closure & Higher-Order Functions in JavaScript Today I learned about three powerful concepts in JavaScript: Scope, Closure, and Higher-Order Functions. These concepts helped me understand how data access and function behavior actually work behind the scenes. The lecture was deeply insightful and covered ideas that are rarely explained this clearly. Thanks to Rohit Negi for the guidance. #coderArmy #JavaScript #WebDevelopment #Frontend #LearningInPublic #Programming #tech #coding #GrowthJourney

💻 Exploring JavaScript Operators and Functions! 🚀 Today I practiced different types of operators and functions in JavaScript, including: ✨ Arithmetic Operators ( + , - , * , % ) ✨ Logical Operators ( && , || , ! ) ✨ String Concatenation ✨ Custom Functions for addition, subtraction, multiplication, and division This helped me understand how JavaScript performs calculations, comparisons, and combines strings — all fundamental skills for any developer! 🧠 Every line of code teaches something new. #JavaScript #WebDevelopment #CodingJourney #LearnToCode #Programming #JSBasics

⚡ Functions in JavaScript — Less Typing, More Flexing 😎 Today I finally learned functions, and wow… they make coding so much easier! Functions are basically your personal minions 🫡 You define them once — and they do the job every time you call them! Here’s what I learned 👇 🔹 Functions make your code clean and reusable 🔹 They accept parameters to work flexibly 🔹 And help you avoid writing the same logic again and again 🙌 It’s crazy how powerful something so simple can be. One function call — and boom 💥 — everything just works! Next up → Arrow functions 🏹 Let’s see how they make things even shorter and smarter. #JavaScript #WebDevelopment #Frontend #CodingJourney #Functions #LearningInPublic #DeveloperLife #Programming #CleanCode #100DaysOfCode

👋 Hello everyone! Today I'd practiced and solved ✅ coding questions on Javascript concepts DOM Manipulations, functions and loops. In this practice I design Your Ordered Items Page by using Javascript DOM Manipulations. Using For...of loop iterate over the list get the each item and append it to the page. Using Function Expression removed the each item from the page. Key Takeaways: ✅ Designing Your Ordered Items Page using Javascript ✅ DOM Manipulations using Javascript ✅ Handling User Interactions using functions ✅ Removed the items using removeChild() method #Day4 of #30Daysofcodingchallenge #Javascript #coding #programming #NxtWave #CCBP