How to Check if a Number is Odd or Even in JavaScript

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

JS Tutorial #1: Introduction to JavaScript Title: JS Tutorial #1: What is JavaScript and How It Works Content: JavaScript is a programming language used to make web pages interactive. It runs in the browser and can also run on the server using Node.js. Code snippet: console.log("Hello, Cognothink!"); Engagement: Try running this in your browser console. What message do you see? Comment below! #JavaScript #Coding #LearnJS #WebDevelopment #Cognothink

💻 Day 2 — Learning to Think in Logic 🧠 Today was all about decision making in JavaScript — learning how code “thinks.” I explored conditional statements: if, else if, switch, and even played around with alert, prompt, and error handling. It’s wild how these simple tools form the foundation of every program’s logic. Each concept feels like another small piece of the bigger picture coming together. Still early days — but every line of code is one step closer to clarity and confidence. 🌱 #Day2 #CodingJourney #MERNStack #LearnInPublic #JavaScript

🚀 Day 19 of JS series by Rohit Negi Today, I learned about one of the most important concepts in modern JavaScript — Promises! Here’s what I explored 👇 ✅ What a Promise is and how it’s created ✅ How to handle Promises using .then() and .catch() ✅ What JSON (JavaScript Object Notation) is. It is independent of programming languages ✅ How Promises help solve the callback hell problem #JavaScript #WebDevelopment #LearnInPublic #AsyncJS #Promises #CodingJourney

💡 Understanding the Difference Between 0, Null & Undefined Every developer faces this at least once — the classic confusion between 0, null, and undefined. Here’s a fun way to remember it 👇 🧻 0 → The roll is empty but exists. 🚫 Null → The roll holder is empty by intent. ❓ Undefined → The roll holder doesn’t even exist yet. These subtle differences can make or break your logic, especially in JavaScript! #JavaScript #WebDevelopment #CodingHumor #ProgrammingConcepts #FrontendDevelopment #TechEducation #Developers #SoftwareEngineering #LearningToCode #CodingTips #ProgrammingBasics #DataTypes #NullVsUndefined #CodeLife #TechCommunity #SoftwareDeveloper #ProgrammingJokes #CodingKnowledge #DeveloperCommunity #TechLearning

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

JS Tutorial #3: Functions Title: JS Tutorial #3: Functions in JavaScript Content: Functions are reusable blocks of code. They help organize your program. Code snippet: function greet(name) { return `Hello, ${name}!`; } console.log(greet("Cognothink")); Engagement: Write a function that takes two numbers and returns their sum. Try it out! #JavaScript #WebDevelopment #Coding #LearnJS #Cognothink

Closures in JavaScript (Made Super Simple) Ever seen a function that remembers something from where it was created — even after that place no longer exists? That’s called a Closure. 🔹 What’s a Closure? When a function is created inside another function, the inner one can use the outer function’s variables — even after the outer one finishes running. Think of it like a child remembering things from its parent’s home 🏠 🔒 Why It’s Useful Closures help you keep data safe and private — only the inner function can access it. ✨ Remember: Closures = Function + Memory 🧠 They make your JavaScript smarter and safer. 💡 Next Up: Callback functions — the secret behind async code in JS #JavaScript #WebDevelopment #FrontendDevelopment #Programming #Coding #MERNStack #JSBasics #TechTips #LearnToCode #SoftwareEngineering #JavaScriptForBeginners #WebDevTips #CodingLife #DevCommunity #Closure

👋 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

Keywords in JavaScript - JavaScript Tutorial 09 🚀 ► https://lnkd.in/ggh6CJ5Q ► In this tutorial, we dive into JavaScript keywords, explaining their use in defining variables, control flow, and more. Learn how to use them effectively to write clean, functional JavaScript code. JavaScript Tutorials Playlist:  ► https://lnkd.in/g-TAmZZ3 #javascript #coding #programming #webdevelopment #learnjavascript #webdeveloper #coder #code #html #css