function split(x, ft) // x: an iterable // ft: test function (v, i, x)

const xiterable = require('extra-iterable'); var x = [1, 2, 2, 3, 5, 4, 4, 7]; [...xiterable.split(x, v => v % 2 === 0)]; // → [[1], [3, 5], [7]] var x = [2, 4, 5, 6, 8]; [...xiterable.split(x, v => v % 2 === 0)]; // → [[5]]