20 lines
384 B
JavaScript
20 lines
384 B
JavaScript
/**
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* Array#filter.
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*
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* @param {Array} arr
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* @param {Function} fn
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* @return {Array}
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*/
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module.exports = function (arr, fn) {
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if (arr.filter) return arr.filter(fn);
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var ret = [];
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for (var i = 0; i < arr.length; i++) {
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if (!hasOwn.call(arr, i)) continue;
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if (fn(arr[i], i, arr)) ret.push(arr[i]);
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}
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return ret;
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};
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var hasOwn = Object.prototype.hasOwnProperty;
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