Whats the difference between Array.fill and a for loop to create Array

Question

I\'m creating a dungeon crawler game using React.js and I was initializing the board using Array.fill(0). but when I set an element inside the 2d array it sets the entire Ar

Answer 1

You can fill 2D array with a help of Array.fill in a such way:

let arr = Array(5).fill(0).map(x => Array(5).fill(0))