/** * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved. * For licensing, see LICENSE.md. */ /** * @module utils/count */ /** * Returns the number of items return by the iterator. * * count( [ 1, 2, 3, 4, 5 ] ); // 5; * * @param {Iterable.<*>} iterator Any iterator. * @returns {Number} Number of items returned by that iterator. */ export default function count( iterator ) { let count = 0; for ( const _ of iterator ) { // eslint-disable-line no-unused-vars count++; } return count; }