Gourav Hammad - LearnYard - Free Programming & DSA Blogs

🚀 Frontend DSA 10 - 💥 JavaScript Polyfill: Array.prototype.map()

JavaScript’s built-in Array.prototype.map() method creates a new array by calling a provided callback function on every element in the calling array. Let’s write a polyfill that mimics this behavior and call it myMap(). ✅ Working Solution: const test = [1, 2, 3, 4, 5, 6, 7, 8, 8,

Recursion / Function

🚀 Frontend DSA 9 - 🧠 JavaScript Currying: Flexible Argument Pattern for Sum Function

Currying is a functional programming technique where a function of multiple arguments is transformed into a sequence of unary functions. This article explores a more advanced, flexible curry function that: * Allows partial application of arguments * Works for any calling pattern * Returns the final result only when sufficient arguments are provided

🚀 Frontend DSA 8 - 🔄 Currying in JavaScript: Define a Chainable Sum Function Without Final ()

JavaScript offers powerful flexibility when it comes to function chaining, currying, and type coercion. In this guide, we'll implement a function sum() that can be called repeatedly like this: sum(0)(1)(2)(3)(4)(5) ➞ 15 Notice: No final () required! 🤯 ✅ Problem Statement Write a function such that:

Recursion / Function

🚀 Frontend DSA 7 - 🧮 Currying in JavaScript: Create a Sum Function with Infinite Calls Ending with ()

Currying is a powerful and elegant technique in JavaScript used to transform functions with multiple arguments into a sequence of functions, each taking a single argument. In this guide, we’ll build a recursive curried sum function that allows you to call: sum(1)(2)(3)(4)(5)(); // ➞ 15 Let’

🚀 Frontend DSA 6 - 🧩 Flatten Deep Nested JavaScript Objects into Dot Notation ('a.b': 1 Style)

One common pattern in modern JavaScript development, especially when working with deeply nested APIs, configs, or JSON data, is flattening nested objects into a dot notation format like: { 'a.b': 1, 'e.f.g': 2, 'e.f.h': 3 } In this article, we'

🚀 Frontend DSA 5 - 📊 How to Sum Values in a Singly Linked List in JavaScript (Recursive Approach)

Singly linked lists are a fundamental data structure every JavaScript developer should understand. They’re used in everything from memory-efficient data storage to implementing queues and stacks. 🚀 In this article, you'll learn how to traverse and sum all values in a singly linked list using a recursive approach

🚀 Frontend DSA 4 - 🔀 How to Shuffle an Array Randomly in JavaScript (Fisher-Yates Explained)

Ever wanted to shuffle an array like a deck of cards? 🎴 Whether you're building a quiz app, a game, or need random ordering, shuffling arrays is a must-have trick in your JavaScript toolbox. 🚀 Let’s break down a clean and beginner-friendly way to shuffle any array using JavaScript.

🚀 Frontend DSA 3 - 🔍 How to Flatten a Nested Array in JavaScript up to a Given Depth

Working with deeply nested arrays in JavaScript can be tricky, especially when you want to flatten them to a specific depth. Thankfully, you can build your own custom array flattener with just a few lines of code! 🧩 In this tutorial, we’ll break down how to flatten a nested array

🚀 Frontend DSA 2 -⚡Supercharge Your JavaScript Functions with Caching (Memoization)

Are your JavaScript functions doing redundant work with the same inputs over and over again? 🤔 That’s where caching (also called memoization) steps in to save time and resources! In this tutorial, you’ll learn how to create a JavaScript caching utility that can wrap any function and return cached

🚀 Frontend DSA 1 - 🪜 Master JavaScript Method Chaining with a Fun Ladder

If you're diving into JavaScript and want to level up your object and method skills, then method chaining is a concept you must know! Let’s explore it with a fun and beginner-friendly example: a ladder object where we can call methods like: ladder.up().up().down().showStep(

🚀 My Cars24 Frontend Engineer Interview Experience (2025) | Software Development Engineer 3 - Frontend

💼 Position Applied: Software Development Engineer 3 – Frontend 🏢 Company: Cars24 📍 Location: Bangalore [Remote/Hybrid Options Available] 💰 Compensation: 25 LPA Fixed + 10 LPA ESOPs 🧠 Primary Skills: JavaScript, React, NextJs, TypeScript, Data Structures, Performance Optimization 🎯 Final Outcome: Received Offer (Did not join, got better offer from other firm) 🏢 About Cars24 CARS24 is an

🚀 My Viacom18 [JioCinema] Frontend Engineer Interview Experience (2025) | SDE II - Frontend Web

💼 Position Applied: SDE II - Frontend Web 🏢 Company: Viacom18 [JioCinema] 📍 Location: Bangalore [Hybrid] 💰 Compensation: 38 LPA Fixed + Some ESOPs 🧠 Primary Skills: JavaScript, React, TypeScript, Data Structures, Performance Optimization 🎯 Final Outcome: Received Offer (Did not join, got better offer from other firm) 🏢 About Viacom18 [JioCinema] Viacom18 Media Private Limited is a

🚀 My Servicenow Frontend Engineer Interview Experience (2025) | Software Engineer [Frontend] IC2

Position: Software Engineer [Frontend] IC2 Location: Remote / India Compensation: 💰 32 LPA Fixed + 10% Variable + ₹6-8L Stocks Tech Stack: JavaScript, HTML, CSS, VanillaJS, ReactJS 🏢 About Servicenow Servicenow is a global leader in digital workflow automation, helping enterprises streamline IT, employee, and customer operations. Known for its scalable cloud platform, it delivers

Quince

🚀 My Quince Frontend Engineer Interview Experience (2025) | Software Development Engineer 3

Position: Software Development Engineer 3 [Frontend] Location: Bangalore Compensation: 💰 40-42 LPA Fixed + 40 LPA Esops Tech Stack: JavaScript, HTML, CSS, VanillaJS, ReactJS 🏢 About Quince Quince is a fast-growing e-commerce platform focused on providing luxury-quality essentials at radically lower prices by cutting out middlemen. Their tech team is lean, and their

🚀 My Neurowyzr Frontend Engineer Interview Experience (2025) | Lead Frontend Engineer

Neurowyzr is a Singapore-based health-tech startup focused on enhancing brain health using AI and neurotechnology. 🧠💻 They aim to revolutionize early detection and monitoring of cognitive decline through digital assessments and predictive analytics. * Founded: 2019 * Industry: HealthTech | NeuroScience * Headquarters: Singapore 🇸🇬 * Company Stage: Growing early-stage startup 🚀 * Work Culture: Fully remote, lean team,

🚀 My Sense Frontend Engineer Interview Experience (2025) | Senior UI Developer

Frontend interviews at top product-based companies test far more than your UI skills—they assess your problem-solving ability, architectural thinking, and code clarity. I recently interviewed at Sense, and this article breaks down my complete journey—DSA questions, advanced JavaScript challenges, system design discussions, and hands-on machine coding. If you&

🚀 My Hanseaticsoft [🇩🇪] Frontend Engineer Interview Experience (2025) | Senior Frontend Engineer

A Journey of Technical Rigor, Cultural Insights, and a Missed Opportunity 🏢 About the Company Hanseaticsoft GmbH is a leading Germany-based software company, known for providing cloud-based solutions to the maritime industry. The company is a part of the Lloyd’s Register Group, which has a long history of serving the

🚀 My UiPath Frontend Engineer Interview Experience (2025) | Software Engineer II

📍 Location: Remote / Bengaluru 🧠 Role: Software Engineer II 💰 Compensation: ₹35 LPA Fixed + $150-200K ESOPs [vested in 4 years] 🏢 About UiPath UiPath is a global leader in Robotic Process Automation (RPA), helping enterprises automate repetitive tasks and streamline workflows. With a strong presence across the US, Europe, and India, UiPath blends AI,

🚀 My DP World Frontend Engineer Interview Experience (2025) | Sofware Development Engineer 1

Hey folks! 👋 I recently interviewed at DP World for a Frontend Engineer (SDE-1) role, and I wanted to share my complete experience — from DSA and React to Machine Coding and System Design. If you're preparing for frontend interviews, this could really help! 💡 🏃‍♂️ Round 1: DSA & Problem Solving

🚀 My Tekion Frontend Engineer Interview Experience (2025) | Software Engineer II

📌 Role: Software Engineer II (Frontend) 🏢 Company: Tekion Corp 🎯 Topics Covered: JavaScript DSA, Currying, Polyfills, Machine Coding, System Design 🗓️ Total Rounds: 4 (DSA, Machine Coding, LLD + HLD, HM Discussion) 🧠 Round 1: Data Structures & Algorithms 1️⃣ Polyfill for bind() Method in JavaScript 📌 Concept Tested: Understanding of this, closures, and function binding.