--- /dev/null
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+ value: true
+});
+exports.default = _filter;
+
+var _arrayMap = require('lodash/_arrayMap');
+
+var _arrayMap2 = _interopRequireDefault(_arrayMap);
+
+var _isArrayLike = require('lodash/isArrayLike');
+
+var _isArrayLike2 = _interopRequireDefault(_isArrayLike);
+
+var _baseProperty = require('lodash/_baseProperty');
+
+var _baseProperty2 = _interopRequireDefault(_baseProperty);
+
+var _noop = require('lodash/noop');
+
+var _noop2 = _interopRequireDefault(_noop);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function filterArray(eachfn, arr, iteratee, callback) {
+ var truthValues = new Array(arr.length);
+ eachfn(arr, function (x, index, callback) {
+ iteratee(x, function (err, v) {
+ truthValues[index] = !!v;
+ callback(err);
+ });
+ }, function (err) {
+ if (err) return callback(err);
+ var results = [];
+ for (var i = 0; i < arr.length; i++) {
+ if (truthValues[i]) results.push(arr[i]);
+ }
+ callback(null, results);
+ });
+}
+
+function filterGeneric(eachfn, coll, iteratee, callback) {
+ var results = [];
+ eachfn(coll, function (x, index, callback) {
+ iteratee(x, function (err, v) {
+ if (err) {
+ callback(err);
+ } else {
+ if (v) {
+ results.push({ index: index, value: x });
+ }
+ callback();
+ }
+ });
+ }, function (err) {
+ if (err) {
+ callback(err);
+ } else {
+ callback(null, (0, _arrayMap2.default)(results.sort(function (a, b) {
+ return a.index - b.index;
+ }), (0, _baseProperty2.default)('value')));
+ }
+ });
+}
+
+function _filter(eachfn, coll, iteratee, callback) {
+ var filter = (0, _isArrayLike2.default)(coll) ? filterArray : filterGeneric;
+ filter(eachfn, coll, iteratee, callback || _noop2.default);
+}
+module.exports = exports['default'];
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