wishthis/node_modules/array-last/index.js

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2022-01-21 08:28:41 +00:00
/*!
* 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;
};