30-seconds-of-code/snippets/initialize2DArray.md

initialize2DArray

Initializes a 2D array of given width and height and value.

Use Array.map() to generate h rows where each is a new array of size w initialize with value. If the value is not provided, default to null.

const initialize2DArray = (w, h, val = null) =>
  Array(h)
    .fill()
    .map(() => Array(w).fill(val));

initialize2DArray(2, 2, 0); // [[0,0], [0,0]]