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34 lines
630 B
JavaScript
Executable file
34 lines
630 B
JavaScript
Executable file
/*!
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* arr-filter <https://github.com/jonschlinkert/arr-filter>
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*
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* Copyright (c) 2014-2015, 2017, Jon Schlinkert.
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* Released under the MIT License.
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*/
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'use strict';
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var makeIterator = require('make-iterator');
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module.exports = function filter(arr, fn, thisArg) {
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if (arr == null) {
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return [];
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}
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if (typeof fn !== 'function') {
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throw new TypeError('expected callback to be a function');
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}
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var iterator = makeIterator(fn, thisArg);
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var len = arr.length;
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var res = arr.slice();
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var i = -1;
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while (len--) {
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if (!iterator(arr[len], i++)) {
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res.splice(len, 1);
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}
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}
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return res;
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};
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