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/**
* @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
*/
/**
* @module utils/nth
*/
/**
* Returns `nth` (starts from `0` of course) item of the given `iterable`.
*
* If the iterable is a generator, then it consumes **all its items**.
* If it's a normal iterator, then it consumes **all items up to the given index**.
* Refer to the [Iterators and Generators](https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Iterators_and_Generators)
* guide to learn differences between these interfaces.
*
* @param {Number} index
* @param {Iterable.<*>} iterable
* @returns {*}
*/
export default function nth( index, iterable ) {
for ( const item of iterable ) {
if ( index === 0 ) {
return item;
}
index -= 1;
}
return null;
}