is - nodef/extra-regexp GitHub Wiki

Produces accumulating values. [:running:] [:vhs:] [:package:] [:moon:] [:ledger:]

Similar: [map], [filter], [reduce], [accumulate].

iterable.accumulate(x, fn, [acc]);
// x:   an iterable
// fn:  reduce function (acc, v, i, x)
// acc: initial value

const regexp = require('extra-regexp');

regexp.is(/[A-Z]/);
// true

regexp.is(0);
// false

references