Question

How to create a two dimensional (2D) array and initialize the array with specific number in JavaScript

Answer 1

const rows = 3;
const cols = 4;
const arr = new Array(rows).fill(new Array(cols).fill(-1));

console.log(arr);




/*
run:

[ [ -1, -1, -1, -1 ], [ -1, -1, -1, -1 ], [ -1, -1, -1, -1 ] ]

*/

 

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