Скачать или смотреть Word Frequency | Print Numbers with Delay | Array.map Polyfill — JS Machine Coding Round (Episode 2)

Welcome to Episode 2 of the JavaScript Machine Coding Round series on Code My Hobby!
In this episode, I solve three real interview-style JavaScript problems commonly asked in service-based IT companies like TCS Digital, Infosys SP, Accenture, Cognizant, LTIMindtree, Tech Mahindra, and more.

🔥 What We Solve in Episode 1
1️⃣ Core Logic Problem — Word Frequency Counter

Learn how to break a sentence into words, normalize text, loop through values, and generate a frequency map using JavaScript objects.

2️⃣ Async JavaScript — Print Numbers 1 to 5 with Delay

Understand how to build a custom wait() function, use async/await, and print numbers sequentially with a 1-second gap.

3️⃣ Polyfill — Array.prototype.map()

Write your own version of Array.map() from scratch, learn how internal callbacks work, and handle sparse arrays properly.

🧠 Why These Problems Matter

These three problems form the foundation of many service-based company machine coding rounds because they test:

Core JavaScript logic

Async behavior & sequencing

Deep understanding of JS internals

Problem breakdown & clean coding

🚀 What To Expect in This Series

Every episode contains three new problems:
✔ Core Logic
✔ Async Simulation
✔ Polyfill (or advanced core JS concept)

Daily episodes will help you build solid fundamentals and prepare for real interview rounds.

If you enjoy this video, please Like, Comment, and Subscribe.
Let’s learn and grow together — because coding is not just a skill… it’s a hobby! ❤️

— Suraj | Code My Hobby

#javascriptinterview,
#javascriptmachinecodinground,
#wordfrequencyjavascript,
#javascriptstringproblems,
#asyncjavascript,
#printnumbersjavascript,
#javascriptdelay,
#arraymappolyfill,
#javascripttutorial,
#servicebasedcompanyinterview,
#codemyhobby