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| /** | |
| * Iterates over elements of `array`, returning an array of all elements | |
| * `predicate` returns truthy for. The predicate is invoked with three | |
| * arguments: (value, index, array). | |
| * | |
| * **Note:** Unlike `remove`, this method returns a new array. | |
| * | |
| * @since 5.0.0 | |
| * @category Array | |
| * @param {Array} array The array to iterate over. | |
| * @param {Function} predicate The function invoked per iteration. | |
| * @returns {Array} Returns the new filtered array. | |
| * @see pull, pullAll, pullAllBy, pullAllWith, pullAt, remove, reject | |
| * @example | |
| * | |
| * const users = [ | |
| * { 'user': 'barney', 'active': true }, | |
| * { 'user': 'fred', 'active': false } | |
| * ] | |
| * | |
| * filter(users, ({ active }) => active) | |
| * // => objects for ['barney'] | |
| */ | |
| function filter(array, predicate) { | |
| let index = -1 | |
| let resIndex = 0 | |
| const length = array == null ? 0 : array.length | |
| const result = [] | |
| while (++index < length) { | |
| const value = array[index] | |
| if (predicate(value, index, array)) { | |
| result[resIndex++] = value | |
| } | |
| } | |
| return result | |
| } | |
| export default filter |