Initialize an array in javascript

initialize-array.js

const initArray = (n, v) => Array(n).fill(v);
const initList = (size, fromZero = true) =>  Array.from({ length: size }, (_, i) => fromZero? i: i+1)

const l = initArray(5, 0);
// l = [0, 0, 0, 0, 0]
const l2 = initList(5);
// l2 = [0, 1, 2, 3, 4]
const l3 = initList(5, false);
// l3 = [1, 2, 3, 4, 5]

Mostly taken from https://stackoverflow.com/questions/3746725/how-to-create-an-array-containing-1-n