`array.fill()`

Array API: array.fill()

Array.prototype.fill() can fill up an array with one value.

`Array.prototype.fill` can fill up an array with one value

fill(0) will populate 0 into each array element

const arr = new Array(3).fill(); assert.deepEqual(arr, [0, 0, 0]);

fill only changes content, adds no new elements

const arr = [undefined].fill(0); assert.deepEqual(arr, []);

second parameter to fill() is the position where to start filling

const fillPosition = 0; const arr = [1,2,3].fill(42, fillPosition); assert.deepEqual(arr, [1, 2, 42]);

third parameter is the position where filling stops

const fillStartAt = 1; const fillEndAt = 1; const arr = [1,2,3].fill(42, fillStartAt, fillEndAt); assert.deepEqual(arr, [1, 42, 3]);