Algorithms, Data Structures, Competitive Coding, and problems from LeetCode with complete Solution Approach, Pseudocode, and Explanation.
🔗 LC2667 🟢 Easy 🧩 Pattern – Closures and Higher Order Functions 📅 Day 1/30 Days of JavaScript Write a function createHelloWorld. It should return a new function that always returns “Hello World”. Example Solution While this is a straightforward question, it’s important to understand key JavaScript concepts such as Higher Order Functions,… Read More »Create Hello World Function – 2667
A Linked List 🔗 is a linear data structure that stores data in a list of nodes, each node has a pointer to the next node and so on until the tail points to null. Singly Linked List: In a singly linked list, each node has a pointer only to… Read More »Doubly Linked List in JavaScript
Linked List 🔗 is a linear data structure that stores data as a list of nodes, where each node has a pointer to the next node and so on until the tail points to null. It has a head, tail, and length properties. We have arrays, but insertion/deletion or modification… Read More »Singly Linked List in JavaScript
A Queue is a data structure that follows the FIFO (First In, First Out) principle. Think of it like a real-world queue 🧑🤝🧑 where people join from the last and exit from the start. Operations performed on a Queue JavaScript Code for a Queue I have implemented the JavaScript code… Read More »Implementing Queue in JavaScript
A stack is a data structure that follows the LIFO (Last In, First Out) principle. Think of it like a stack of books 📚: you can only add a new book to the top or remove one from the top. Operations performed on a Stack JavaScript Code for a Stack… Read More »Implementing Stack in JavaScript
Contains Duplicate – LeetCode problem: We need to check if the given array contains duplicates and return True if duplicates are present and False otherwise. Link: Contains Duplicate LeetCode Difficulty: Easy Examples:Input: nums = [1,2,3,2]Output: true Example 2:Input: nums = [1,2,3,4]Output: false Solution in JavaScript Here we use an object… Read More »Contains Duplicate LeetCode – JS Solution