Leetcode 2620: Closure Function with Incrementing Counter

📚 New article just published on SYUTHD! 🔖 Mastering Local-First Frameworks: The 2026 Guide to Building With PGLite and CRDTs 🏷️ Category: JavaScript Frameworks 📖 Full article → https://lnkd.in/gMuajsA2 👉 Follow our page for more tech tutorials: https://lnkd.in/gsJDptPM 💬 Telegram: https://t.me/nisethtechno 👍 Facebook: https://lnkd.in/gsKv3Dyn #JavaScriptFrameworks #Tech #Tutorial #Programming #TechBlog #2026

Closures look confusing at first, but the core idea is simple: A closure is when a function remembers variables from the scope where it was created, even after that outer function has finished running. That is why closures are so useful for private state, counters, factories, and callbacks. The infographic breaks it down visually: create a variable, return an inner function, and that inner function keeps access to the remembered value. If you understand this, a lot of JavaScript starts making more sense. What JavaScript concept should I simplify next? #JavaScript #Closures #WebDevelopment #FrontendDevelopment #Programming #LearnToCode #ReactJS #SoftwareEngineering

Understanding Sets, Maps, and Objects in JavaScript: When and How to Use Each Learn the differences between JavaScript's Set, Map, and plain Object data structures, their performance characteristics, and real‑world use cases. This tutorial walks you through practical examples, best practices, and guidelines for choosing the right structure for your code. Read the full article 👇 https://lnkd.in/gpUYsFux #JavaScript #WebDevelopment #Programming #Tech #Coding #JavaScriptSet #JavaScriptMap #DataStructures #FrontendDevelopment #JSBestPractices #DigitalTransformation #FutureOfWork

Day 3 of 30 days of javascript, Leetcode problem - 2704 The problem statement asked to create a function "expect" that needs to return an object with two functions "toBe" and "notToBe" where in the value assigned to "toBe" , if is same as the parent function, it should return true, else it should throw an error, "Not Equal" and... where in the value assigned to "notToBe", if is not same as the parent function should return true, or else it should throw an error "Equal". This problem taught me the understanding of nesting objects in function body, I deep dived into closures and how a object can access the parent through lexical scope. #coding #logic #leetcode #programming #lexicalscope #MERN #web #webdevelopment #goals

Mastering JavaScript Arrays Made Simple! Understanding JavaScript array methods is a game-changer. They help you write cleaner, more efficient code without relying on lengthy loops. The image below highlights essential array methods every developer should know-use it as a quick visual guide to level up your JavaScript skills. #JavaScript #WebDevelopment #Coding #Frontend #Programming #LearnToCode #JavaScriptDeveloper #JSArray #ArrayMethods #ArrayMap #ArrayFilter #ArrayReduce #ES6JavaScript #FrontendDevelopment #CodingTips

The "this" Keyword: Predictable or a Trap? 🧐 Most devs think they understand this, until it returns undefined. Can you guess the output of this simple object? const obj = { a: 10, f: function () { return this.a; }, }; console.log(obj.f()); The answer seems easy... but do you know what happens to this if we change that function to an Arrow Function? 🤯 In my latest video, I break down exactly how execution context works so you never have to guess again. #JavaScript #WebDev #CodingTips #SoftwareEngineering #Programming

30 Days JavaScript Challenge: Day 18 ✅ Today’s problem was about implementing a debounce function. The idea is simple but very useful delay the execution of a function, and if it gets called again within that delay, cancel the previous call and restart the timer. This concept is widely used in real-world scenarios like: • search input optimization • reducing unnecessary API calls • handling rapid user events It was a great exercise to understand how timers and function control work together in JavaScript. 18 days in getting more comfortable with concepts that are actually used in real applications. 💻🚀 #javascript #leetcode #webdevelopment #frontenddeveloper #codingchallenge #learninginpublic #developers #programming #buildinpublic

What is the difference between let, var, and const? `var`, `let`, and `const` are used to declare variables in JavaScript, but they behave differently. `var` is the older way and has function scope, which can lead to unexpected behavior. It also allows redeclaration and can be updated freely. `let` is block-scoped, meaning it only exists within the block where it’s defined. It can be updated but not redeclared in the same scope, making it safer than `var`. `const` is also block-scoped but cannot be reassigned after it’s declared. It’s used for values that should not change. Overall, `let` and `const` are preferred in modern JavaScript. #webdeveloper #tech #coding #programming

🚀 Day 22 - Poll answer & Explanation const map = new Map(); map.set("a", 1); map.set("b", 2); const set = new Set([1, 2, 3, 3]); console.log(map.size, set.size); 2 3  Explanation (simple & clear):  - Map stores key-value pairs → "a" and "b" → size = 2  - Set stores only unique values → duplicates removed  - [1, 2, 3, 3] → becomes [1, 2, 3] → size = 3  Key Point:  - Map counts unique keys  - Set automatically removes duplicate values  Output:  2 3 #JavaScript #JSInterview #FrontendDevelopment #WebDevelopment  #CodingChallenge #JSConcepts #Developers #Programming  #TechInterview #LearnJavaScript #100DaysOfCode #CodeNewbie  #SoftwareDevelopment #CodingTips #JSBasics #DevelopersLife

Just published a deep dive into how V8 handles arrays under the hood 🚀 Key takeaway: not all arrays are equal. Packed arrays (SMI/Double) and TypedArrays are highly optimized, while holey and mixed arrays introduce hidden performance costs due to extra checks and de-optimizations. If you're writing performance-critical JavaScript, these low-level details *matter more than you think*. I’ve also included a benchmark to see the differences yourself 👇 https://lnkd.in/gsxGFNZv #JavaScript #V8 #Performance #NodeJS #Programming