How can I declare and fill at the same time an array of arrays (matrix) using the JavaScript Array fill() Method?

Question

I tried to make an array and then to map over it and declare new arrays but failed miserably.

let matrix = (new Array(5).fill(0)).map(new Array(5).fill(0));

`let matrix = (new Array(5).fill(0)).map(v => v = new Array(5).fill(0));` — kind user, May 04 '17 at 19:36
You only need `let matrix = new Array(this.size).fill(0).map(v => new Array(this.size).fill(0))`. — Sebastian Simon, May 04 '17 at 19:38
That's perfect! Thank you kindly! Seems like I didn't use map correctly. — Ioan Ungurean, May 04 '17 at 19:39
Possible duplicate of [How can I create a two dimensional array in JavaScript?](http://stackoverflow.com/questions/966225/how-can-i-create-a-two-dimensional-array-in-javascript) — Heretic Monkey, May 04 '17 at 19:43

score 1 · Accepted Answer · answered May 04 '17 at 19:38

1

function matrix(size) {
  return new Array(size).fill(0).map(el => Array(size).fill(0));
}

console.log(matrix(4));

answered May 04 '17 at 19:38

KevBot

score 1 · Answer 2 · answered May 04 '17 at 19:42

1

I like the following solution

Array.apply(0, {length: 5}).map(function() {return Array(5).fill(0)})

answered May 04 '17 at 19:42

NS0

2 Answers2