JavaScript Array Splicing Pitfall: Avoid Modifying Length in Loops

💻 JavaScript Practice: Merging Two Arrays Using a While Loop Today I practiced an important JavaScript concept — merging two arrays using a while loop. It’s a great exercise to improve logical thinking and understand how loops and indexes work together. Instead of using built-in methods like concat() or the spread operator, I tried doing it manually with a while loop. This helps in understanding how data moves step by step inside arrays. Key Idea: Start with two arrays. Use a while loop to iterate through them. Push elements into a new array until all elements are merged. Example: let arr1 = [1, 2, 3]; let arr2 = [4, 5, 6];then let result = [1,2,3,4,5,6] Practicing these small problems helps build a stronger foundation in JavaScript logic and problem-solving. 🚀 #JavaScript #DSA #WebDevelopment #CodingPractice #FrontendDevelopment 😊

🚀 30 Days of JavaScript – Day 6 Continuing my journey to improve my JavaScript logical thinking by building small programs every day. 💡 Today’s Program: Find the Largest Number (User Input) This program allows the user to enter numbers separated by commas and then finds the largest number in the list. 🧠 Concepts Used: • prompt() for user input • split() to convert input into an array • map(Number) to convert strings into numbers • for loop for iteration • Conditional comparison (if statement) 📌 Example Input: 10,25,7,90,30 Output: Largest Number: 90 🎥 Demo below 👇 Full source code in the First comment. #JavaScript #WebDevelopment #CodingJourney #ProblemSolving #LearningJavaScript #30DaysOfCode

Day 1 of 30 days of javascript challenge. problem-2667 Problem - Write a function createHelloWorld that returns another function, that returns "Hello World" As this is my first code, I revised my notes on javascript scope. ☑️ Function scope - Any variables declared inside a function body cannot be accessed outside the function body, but global variables can be used inside function body ☑️ Block scope - Any variable declared inside { } cannot be used outside the { } block, although it supports only let and const keyword, var can be used ☑️ Lexical scope - A variable declared outside a function can be accessed inside another function defined after the variable declaration. (The opposite is not true ) This problem uses the concept of closures and higher order functions. Please feel free to discuss where can I improve the code or if you have a different perspective, comment below your views. #javascript #coding #development #motivation #goals #leetcode #webdevelopment

🚀 Today’s JavaScript Practice: Merging Two Arrays Using a For Loop Today I practiced how to merge two arrays in JavaScript using a for loop instead of built-in methods. This helped me better understand how array indexing and loops work internally. 🔹 First, I created two arrays with some numbers. 🔹 Then I used a for loop to copy elements from the first array into a new array. 🔹 After that, I used another for loop to add elements of the second array after the first array’s elements. 💻 Example idea: data1 = [10,20,30,40,50] data2 = [60,70,80,90,100] ✅ Result → [10,20,30,40,50,60,70,80,90,100] You can also check my GitHub profile for more practice projects and code. #DSA #JavaScript #WebDevelopment #CodingPractice 😊

🚨 Many beginners get confused between var, let, and const in JavaScript. They all create variables… but they behave very differently. If you understand this early, your JavaScript code will be cleaner and safer. Here is the simple difference 👇 • var Old way to create variables. It is function scoped and can be re-declared and updated. • let Modern JavaScript variable. It is block scoped and can be updated but not re-declared in the same scope. • const Used for values that should not change. It is block scoped and cannot be re-assigned. Quick tip 💡 Use const by default, let when value changes, and avoid var in modern JavaScript. Small concepts like this make a big difference in writing better code. #javascript #webdevelopment #frontenddevelopment #codingtips #learnjavascript #programmingbasics #softwaredevelopment #devcommunity #100daysofcode #javascriptdeveloper

JavaScript Closures — made simple 💡 Closures sound complex… but they’re actually simple once you get the idea. A closure is when a function remembers variables from its outer scope even after the outer function has finished executing. Think of it like this: An inner function carries a “backpack” of variables and never forgets them. How it works: 1. Outer function creates a variable 2. Inner function uses that variable 3. Outer function returns the inner function 4. Inner function still has access to that variable Why closures are powerful: • Data privacy (encapsulation) • Maintain state between function calls • Used in callbacks, event handlers, React hooks • Foundation for advanced JavaScript concepts Real-world uses: • Counters • Private variables • One-time execution functions • Custom hooks & memoization One-line takeaway: A closure = function with a memory of its lexical scope If you understand closures, you’re moving from basics to real JavaScript thinking. What concept in JavaScript took you the longest to understand? #JavaScript #Closures #WebDevelopment #Frontend #CodingConcepts #LearnJavaScript #Programming #DeveloperLife

JavaScript Closures — made simple 💡 Closures sound complex… but they’re actually simple once you get the idea. A closure is when a function remembers variables from its outer scope even after the outer function has finished executing. Think of it like this: An inner function carries a “backpack” of variables and never forgets them. How it works: 1. Outer function creates a variable 2. Inner function uses that variable 3. Outer function returns the inner function 4. Inner function still has access to that variable Why closures are powerful: • Data privacy (encapsulation) • Maintain state between function calls • Used in callbacks, event handlers, React hooks • Foundation for advanced JavaScript concepts Real-world uses: • Counters • Private variables • One-time execution functions • Custom hooks & memoization One-line takeaway: A closure = function with a memory of its lexical scope If you understand closures, you’re moving from basics to real JavaScript thinking. What concept in JavaScript took you the longest to understand? #JavaScript #Closures #WebDevelopment #Frontend #CodingConcepts #LearnJavaScript #Programming #DeveloperLife

💻 JavaScript Intermediate – Custom map() Function The map() method is widely used to transform arrays. Here’s how you can implement it manually. 📌 Problem: Apply a function to each element of an array and return a new array. function customMap(arr, callback) { let result = []; for (let i = 0; i < arr.length; i++) { result.push(callback(arr[i])); } return result; } let numbers = [1, 2, 3]; let doubled = customMap(numbers, function(num) { return num * 2; }); console.log(doubled); 📤 Output: [2, 4, 6] 📖 Explanation: • map() creates a new array by applying a function to each element. • Here, we manually implemented the same logic using a loop and callback. 💡 Tip: Understanding this helps you grasp how higher-order functions work in JavaScript. #JavaScript #Coding #WebDevelopment #FrontendDevelopment #LearnToCode #ProgrammingTips

JavaScript objects have a powerful feature called Prototype that enables inheritance. In JavaScript, if an object doesn’t have a specific property or method, the engine automatically looks for it in its prototype. This process continues up the prototype chain until the property is found or the chain ends. Example: function Person(name) { this.name = name; } Person.prototype.greet = function () { console.log("Hello, my name is " + this.name); }; const john = new Person("John"); john.greet(); Even though john doesn’t directly have the greet() method, it can still access it through Person.prototype. This mechanism allows JavaScript objects to share methods and inherit behavior efficiently. Understanding prototypes helps you better understand how inheritance and object behavior work behind the scenes in JavaScript. Follow for more JavaScript concepts explained visually. #javascript #webdevelopment #frontenddeveloper #coding #learninginpublic #100DaysOfCode

JavaScript Practice – Day by Day Improvement Today I practiced a JavaScript logic problem “Array Chunking.” The goal was to split an array into smaller subarrays (chunks) of a given size.  Concepts & Methods Used: • for loop for iteration • Array.slice() method to extract subarrays • Incrementing index by chunk size (i += n) for efficient traversal This approach helps break a large array into manageable chunks and improves understanding of array manipulation and problem-solving in JavaScript. I’m focusing on improving my JavaScript logic day by day through consistent practice. 💻 #JavaScript #ProblemSolving #CodingPractice #WebDevelopment #FrontendDevelopment