function searchValueAll(x, v, fc, fm) // x: an iterable // v: search value // fc: compare function (a, b) // fm: map function (v, i, x)

const xiterable = require('extra-iterable'); var x = [1, 2, 3, 2, 5]; [...xiterable.searchValueAll(x, 2)]; // → [1, 3] ^ ^ var x = [1, 2, 3, -2, 5]; [...xiterable.searchValueAll(x, 2, (a, b) => Math.abs(a) - Math.abs(b))]; // → [1, 3] ^ ^ [...xiterable.searchValueAll(x, 2, null, v => Math.abs(v))]; // → [1, 3] ^ ^