JavaScript: Range Function for Array

By Xah Lee. Date: 2015-07-25. Last updated: 2021-06-27.

There's no builtin range function to creat a array.

Here is a general range function.

/* [
xah_range(min, max) → return a array from min to max, inclusive.
xah_range(min, max, step) → in steps of step.
If step is not integer, then max may not be included.
http://xahlee.info/js/javascript_range_array.html
version 2019-10-31
] */
const xah_range = (( min, max, step = 1, ) => (Array(Math.floor((max - min) / step) + 1).fill(min).map( ((x, i) => (x + i * step)), )));