Initializes a 2D array of given width and height and value.
Use Array.prototype.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
.
代码片段
const initialize2DArray = (w, h, val = null) =>
Array.from({ length: h }).map(() => Array.from({ length: w }).fill(val));
使用样例
initialize2DArray(2, 2, 0); // [[0,0], [0,0]]