biofriction-wp-theme/node_modules/array-last/index.js

31 lines
559 B
JavaScript

/*!
* array-last <https://github.com/jonschlinkert/array-last>
*
* Copyright (c) 2014-2017, Jon Schlinkert.
* Released under the MIT License.
*/
var isNumber = require('is-number');
module.exports = function last(arr, n) {
if (!Array.isArray(arr)) {
throw new Error('expected the first argument to be an array');
}
var len = arr.length;
if (len === 0) {
return null;
}
n = isNumber(n) ? +n : 1;
if (n === 1) {
return arr[len - 1];
}
var res = new Array(n);
while (n--) {
res[n] = arr[--len];
}
return res;
};