function chunk(x, n, s) // x: an iterable // n: chunk size [1] // s: chunk step [n]

const xiterable = require('extra-iterable'); var x = [1, 2, 3, 4, 5, 6, 7, 8]; [...xiterable.chunk(x, 3)]; // → [[1, 2, 3], [4, 5, 6], [7, 8]] [...xiterable.chunk(x, 2, 3)]; // → [[1, 2], [4, 5], [7, 8]] [...xiterable.chunk(x, 4, 3)]; // → [[1, 2, 3, 4], [4, 5, 6, 7], [7, 8]]