Day 7 - Array ForEach & Map Method Polyfill | 75 Days Coding Challenge | JS Interview Questions |
Welcome to Day 7 of the 75 Days JavaScript Machine Coding Challenge! 🚀
In today’s session, we dive deep into writing polyfills for map() and forEach() methods in JavaScript. These array methods are widely used in everyday coding, and knowing how they work internally will boost your interview prep and help you write cleaner, more optimized code.
🔑 What you’ll learn in this video:
How map() works under the hood and when to use it
How forEach() differs from map()
Step-by-step guide to writing polyfills for both methods
Edge cases and best practices for interviews
💡 Why Polyfills?
Polyfills are a great way to understand the internal workings of JavaScript methods. They sharpen your logic and give you confidence during machine coding rounds and JavaScript interviews.
📌 Don’t forget to check out the full 75 Days Challenge Playlist to follow along from Day 1!
👉 Watch till the end and try implementing it yourself. Drop your solutions in the comments!
If you enjoyed this video, try creating the Polyfill for filter method which we will cover in next video, but before that I want to see your solutions first.
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