Code With Jaffer – Learn JavaScript, DSA & Frontend Development

 🚀 Day 3 – Check if a String is a Palindrome (JavaScript DSA) Hey developers 👋, Welcome to Day 3 of my JavaScript + DSA Interview Series – Code With Jaffer. Today, we’re solving a super common and super important problem: > 🧠 Check if a given string is a palindrome. --- 🔍 What is a Palindrome? A palindrome is a word, phrase, number, or sequence that reads the same forward and backward. 🔤 Examples: ✅ "madam" → Palindrome ❌ "hello" → Not a palindrome ✅ "racecar" → Palindrome --- 💡 Problem Statement: Input: A string Output: true if it's a palindrome, else false --- ✅ Solution 1: Built-in JavaScript Functions function isPalindrome(str) {   return str === str.split('').reverse().join(''); } 🧠 Explanation: split(''): Converts string to array reverse(): Reverses array join(''): Combines back into a string Compares reversed and original 💬 Tips to Remember: > Split → Reverse → Join → Compare Use this when you need a...

🚀 Day 2 – Reverse a String in JavaScript (Google/Amazon Favorite!) Hello coders! 👋 Welcome back to Code With Jaffer – Day 2 of our JavaScript + DSA Interview Prep Series. Today’s challenge is simple, but often asked in interviews at Google , Amazon , and TCS : Reverse a string using different techniques . Let’s solve it in 3 different ways , with clear code and explanation! 👇 🧠 Problem Statement: Q: Reverse a given string. Input: "hello" Output: "olleh" 🔹 Method 1: Using JavaScript Built-in Functions javascript Copy Edit function reverseStringBuiltIn ( str ) { return str. split ( '' ). reverse (). join ( '' ); } console . log ( reverseStringBuiltIn ( "hello" )); // Output: olleh ✅ Explanation: split('') converts the string to an array → ['h','e','l','l','o'] reverse() reverses the array join('') joins it back into a string 🧠 Best for : Quick an...

🚀 Welcome to Day 1 – JavaScript DSA Interview Series! Hi developers 👋, Welcome to Code With Jaffer – your new go-to series for mastering JavaScript + DSA (Data Structures & Algorithms). This series is designed to help you: Crack coding interviews at companies like Google, Amazon, and Infosys Improve your problem-solving skills using JavaScript Learn different approaches with clear explanations 🔍 What You'll Learn Today ✅ Why JavaScript is great for DSA ✅ How to set up your JS environment ✅ First DSA problem teaser ✅ Tips to build consistency 💡 Why JavaScript for DSA? JavaScript isn’t just for frontend work – it’s powerful for algorithms too: ✅ Easy to read and write ✅ Works in browser and Node.js ✅ Used in interviews at product companies ✅ Builds logic faster for frontend roles 🔧 Setup Your JavaScript Playground Use any of these: JSFiddle CodeSandbox Replit VS Code + Node.js (for offline practice)