var vs let vs const in JavaScript

🚀 Today I Practiced JavaScript: Quick Sort Algorithm: Sorting is one of the most fundamental concepts in programming, and Quick Sort is a powerful algorithm every developer should know. 💡 Core Concept: Quick Sort follows a divide and conquer approach: 1. Divide the array into smaller parts based on a pivot 2.Conquer by recursively sorting the smaller parts 3.Combine the results to get the final sorted array 🎯 Key Insight: In my JavaScript implementation: 1.I used push() to partition elements into smaller and larger groups 2.I used the spread operator (...) to combine the results efficiently 3.This approach keeps the logic simple while clearly demonstrating how the algorithm works internally. ⚡ Time Complexity: 1. Average: O(n log n) 2. Worst: O(n²) Quick Sort is widely used because of its efficiency and elegant approach to problem-solving. #JavaScript #DSA #Algorithms #Coding #Programming #WebDevelopment #Quick Sort 😊

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

30 Days JavaScript Challenge : Day 27 ✅ Today’s problem was about creating a compact object basically removing all falsy values from an object or array, even if they are nested. At first glance it looks easy, but once nested structures come in, it gets interesting. This problem really tests your understanding of: Falsy values (null, 0, false, "", etc.) Recursion for nested objects/arrays Treating arrays like objects (since indices are keys) It’s one of those questions that feels very practical like cleaning API responses or filtering unwanted data before using it. Definitely helped me think more deeply about how JavaScript handles data structures. Almost at the end now… consistency paying off 🚀 #javascript #leetcode #webdevelopment #frontenddeveloper #codingchallenge #learninginpublic #developers #programming #buildinpublic

What are variables in JavaScript? Variables in JavaScript are used to store data that can be used and updated in your program. They act like containers for values such as numbers, strings, or objects. You can declare variables using let, const, or var. let allows changes, const is for values that shouldn’t change, and var is older and less commonly used. Choosing the right one helps avoid errors. Variables make your code flexible and reusable, allowing you to store user input, perform calculations, and manage data efficiently. #webdeveloper #tech #coding #programming

30 Days JavaScript Challenge : Day 26 ✅ Today’s problem was about flattening a multi-dimensional array, but with a twist we were given a depth n and had to flatten only up to that level. Not a full flatten, not a shallow one… somewhere in between. It really makes you think about recursion and depth control: When to go deeper When to stop How to keep track of current depth What I liked is how this problem builds intuition around nested data structures something you see a lot in real apps (APIs, configs, UI trees, etc.). Slowly getting more comfortable with recursion and thinking in layers. #javascript #leetcode #webdevelopment #frontenddeveloper #codingchallenge #learninginpublic #developers #programming #buildinpublic

Leetcode Day 1 : Problem 1 (Merge Sorted Array) Just solved my first LeetCode problem. It was the classic "Merge Sorted Array" sounds simple, right? But here's what I actually learned: JavaScript's .sort() doesn't sort numbers by default, it sorts them as strings. [1, 10, 2] becomes [1, 10, 2] not [1, 2, 10]. A one-line bug that would fail silently. Reassigning an array variable (arr = []) doesn't modify the original. LeetCode wants in-place changes. That took me a moment. I was filtering out zeros thinking they were empty slots, but 0 is a perfectly valid element. Hidden test cases would've caught me. Three bugs. One "easy" problem. Tons of learning. The real lesson? Passing the visible test cases doesn't mean your code is correct. Always think about edge cases. If you've been putting off starting DSA Interview questions like I was just open problem 1 and start. The first step is the hardest. #DSA #LeetCode #JavaScript #CodingJourney #Programming

this in JavaScript looks simple… until it starts pointing to the wrong thing 😵 Same function, different outputs — just because of how it’s called. So what does this actually mean? 👉 It’s not about where the function is written 👉 It’s about who is calling the function In this blog, I’ve explained: What this really represents this in global context this inside objects and functions How calling context changes everything Kept it simple with clear examples (no unnecessary theory) ✨ 🔗 Read here: https://lnkd.in/dMkPffeA Would appreciate your feedback 🙌 #javascript #webdevelopment #programming #coding

Sharing beginner-friendly notes on Object-Oriented Programming (OOP) in JavaScript 🧠 Covered core concepts like Classes, Constructors, Inheritance, Encapsulation, Polymorphism, Getters/Setters, Static methods, and Private fields (#) with clear examples. Also explained how super, instanceof, and prototypes work behind the scenes. A practical guide to understanding how OOP works in modern JavaScript. Feedback and suggestions are welcome! #JavaScript #OOP #Coding #Learning #Programming

The new keyword looks simple… but most people use it without knowing what it actually does 👀 That’s exactly where confusion starts. Why does a function suddenly create objects? Where does this point? And how do methods magically appear? 👉 It’s all because of new. In this blog, I’ve explained: What new actually does behind the scenes How constructor functions create objects How objects link to shared methods (prototype) Why everything breaks without new Kept it simple, with step-by-step explanation and examples ✨ 🔗 Read here: https://lnkd.in/dyZwek-x Would love your feedback 🙌 Next: Constructor Functions or this keyword? #javascript #webdevelopment #programming #coding

JavaScript array methods visualized with Pokémon. I’ve been experimenting with short visual loops using Claude Code and Remotion to explain concepts faster and this one shows some of the most common array methods in practice. Quick reference using real behavior: • filter() selects matching items • map() transforms items • find() returns the first match • findIndex() returns the index of the match • fill() replaces values • every() checks all items • some() checks at least one • concat() merges arrays • includes() checks existence • push() adds to the end • pop() removes from the end • shift() removes from the start • unshift() adds to the start • splice() removes or replaces items Same concepts, just easier to visualize. #javascript #webdev #frontend #coding #programming