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