How JavaScript map() Works Internally | Dry Run from Scratch (Beginner Friendly)
Автор: Hammad++
Загружено: 2026-02-08
Просмотров: 200
Описание:
Ever wondered how JavaScript’s map() function actually works behind the scenes?
In this video, we build our own map() function from scratch and do a step-by-step dry run using a simple array example.
📌 What you’ll learn:
How callback functions work in JavaScript
How data flows inside map()
How loops and functions connect together
How to think like JavaScript does (execution flow)
This video is perfect for:
✅ JavaScript beginners
✅ Students learning arrays & functions
✅ Anyone who wants to understand JS from first principles
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