Arvind Kumar’s Post

🚀 Day 9 of My 30 Days of JavaScript Journey ✅ Challenge: Arguments Length (LeetCode #2703) Write a function argumentsLength that returns the total number of arguments passed to it — no matter how many or what type! This challenge is a simple yet powerful way to understand rest parameters in JavaScript. 💻 Language Used: JavaScript ❓ Problem Link: https://lnkd.in/g8gK65Cp 💡 Solution: https://lnkd.in/gJQyNBaq 🧠 Concept Highlighted: This problem emphasizes the use of rest parameters (...args) to handle variable-length arguments, a handy feature for building flexible and reusable functions in JavaScript. #Day9 #JavaScript #LeetCode #30DaysOfCode #CodingChallenge #WebDevelopment #FrontendDevelopment #LearningEveryday #ProblemSolving #ES6

Keywords in JavaScript - JavaScript Tutorial 09 🚀 ► https://lnkd.in/gJPYxAec ► 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/getnwV5e #javascript #coding #programming #webdevelopment #learnjavascript #webdeveloper #coder #code #html #css

Understanding Template Literals in JavaScript" Today I learned about Template Literals — a cool way to write cleaner and more readable strings in JavaScript. Instead of using + for string concatenation, we can use backticks (`) and easily include variables or expressions! Example: const name = "Kishore"; const course = "JavaScript"; const message = `Hello, my name is ${name} and I'm learning ${course}!`; console.log(message); // Output: Hello, my name is Kishore and I'm learning JavaScript! It makes string formatting super easy and professional. 🚀 #JavaScript #WebDevelopment #LearnToCode #FrontendDevelopment #CodingJourney #TemplateLiterals #ProgrammingLife #100DaysOfCode #TechLearning #DeveloperCommunity

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

❓ Are “undefined” and “not defined” the same in JavaScript? Not really. In JavaScript, every declared variable automatically gets the placeholder undefined during the memory allocation phase — meaning the variable exists, but no value has been assigned yet. However, if you try to access a variable that was never declared, JavaScript throws not defined. ➡️ Undefined = declared but not assigned ➡️ Not Defined = not declared at all JavaScript is also a loosely typed language, so variables can change types freely. 💡 Pro tip: Never manually assign undefined. Let JavaScript handle that. #JavaScript #WebDevelopment #Programming #Frontend #LearningJS

✨ Day 9 — Mastering Functions in JavaScript (Part 1: The Fundamentals)! ✨ Today, I explored one of the most powerful and essential concepts in JavaScript — Functions! 💻 I started by understanding what a function really is — a reusable “code recipe” that helps us follow the DRY (Don’t Repeat Yourself) principle. 🔁 I learned about the anatomy of a function, including parameters vs. arguments, and the importance of the return keyword. Then, I discovered the difference between Function Declarations and Function Expressions, and how Hoisting works behind the scenes. To wrap up the fundamentals, I explored modern Arrow Functions (=>) — short, clean, and perfect for writing concise logic! ⚡ This session helped me understand how functions make our code modular, reusable, and easy to maintain — truly the foundation of JavaScript programming. 🚀 #Day9 #JavaScript #WebDevelopment #100DaysOfCode #LearningEveryday #Functions #FrontendDevelopment #CodingJourney #TechLearning

JavaScript for 15 Days – Day 5: Functions Today, You will learn about Functions, one of the most important concepts in JavaScript. A function is basically a reusable block of code that performs a specific task. It helps you write cleaner, more organized, and less repetitive code. Example: function greet(name) { return `Hello, ${name}!`; } console.log(greet("Moussa")); // Hello, Moussa! Why functions matter: - They make your code reusable and modular. - They improve readability. - They help you manage logic step by step. JavaScript also supports arrow functions and function expressions, which you’ll explore in slides! #JavaScript #FrontendDevelopment #CodingJourney #LearnToCode #WebDevelopment #15DaysJS #DevPerDay

🚀 New Project Alert — JavaScript Exception Handling! I’ve been exploring how to make JavaScript applications more robust and reliable, and I just published a hands-on project focused on Exception & Error Handling in JavaScript 🧠💻 🔍 This project covers: ✅ try...catch and finally blocks ✅ Custom error creation and throwing exceptions ✅ Best practices for handling asynchronous errors ✅ Writing cleaner, safer code with clear debugging messages You can check it out here 👇 🔗 GitHub Repository. https://lnkd.in/g3f223qc live demo : https://lnkd.in/g_KTj9PK 💬 Error handling is often overlooked, but it’s one of the key skills that separates good developers from great ones. Would love to hear how you approach exception handling in your JavaScript projects! #JavaScript #WebDevelopment #Coding #ErrorHandling #OpenSource

Understanding Async JavaScript JavaScript is single-threaded, meaning it executes code line by line. Slow operations like fetching data from a backend can freeze your app while the code waits. Asynchronous programming solves this by allowing your code to keep running while waiting for tasks like API calls or file reads. Main async patterns in JavaScript: 1.Callbacks 2.Promises 3.Async / Await In the next post, I’ll explain callbacks with an example and their drawbacks.

🚀 Day 2 of My 30 Days of JavaScript Journey ✅ Challenge: Counter Function (LeetCode #2620) Create a function createCounter(n) that returns another function. Each time the returned function is called, it should return the current value of n and then increment it by 1 — producing outputs like (n, n+1, n+2, ...). 💻 Language Used: JavaScript ❓ Problem Link: https://lnkd.in/gczTUyQ4 💡 Solution: https://lnkd.in/g2VVnv8u 🧠 Concept Highlighted: This problem reinforces the concept of closures — how JavaScript functions can "remember" variables from their outer scope even after the outer function has finished executing. It’s a foundational concept for mastering state management and functional programming in JS. 📘 My Takeaway: A small problem, but a powerful reminder that closures are at the heart of JavaScript. Understanding how functions preserve state paves the way for writing more efficient and modular code. Step by step, the logic becomes clearer! 💪 #JavaScript #LeetCode #30DaysOfCode #CodingChallenge #WebDevelopment #FrontendDevelopment #LearningEveryday #Closures