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- 'use strict';
- var isPlainArray = require('../../is-plain-array')
- , callable = require('../../../object/valid-callable')
- , isArray = Array.isArray, filter = Array.prototype.filter
- , forEach = Array.prototype.forEach, call = Function.prototype.call;
- module.exports = function (callbackFn/*, thisArg*/) {
- var result, thisArg, i;
- if (!this || !isArray(this) || isPlainArray(this)) {
- return filter.apply(this, arguments);
- }
- callable(callbackFn);
- thisArg = arguments[1];
- result = new this.constructor();
- i = 0;
- forEach.call(this, function (val, j, self) {
- if (call.call(callbackFn, thisArg, val, j, self)) result[i++] = val;
- });
- return result;
- };
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