Avoid importing lodash/filter in async.filter

1 files changed, 12 insertions, 7 deletions

diff --git a/lib/internal/filter.js b/lib/internal/filter.js
index 1a097f9..454cc54 100644
--- a/lib/internal/filter.js
+++ b/lib/internal/filter.js
@@ -1,19 +1,24 @@
-import filter from 'lodash/filter';
+import each from 'lodash/each';
+import isArrayLike from 'lodash/isArrayLike';
 import noop from 'lodash/noop';
 import once from './once';
 
-export default function _filter(eachfn, arr, iteratee, callback) {
+export default function _filter(eachfn, coll, iteratee, callback) {
     callback = once(callback || noop);
-    var truthValues = new Array(arr.length);
-    eachfn(arr, function (x, index, callback) {
+    var truthValues = isArrayLike(coll) ? new Array(coll.length) : {};
+    eachfn(coll, function (x, index, callback) {
         iteratee(x, function (err, v) {
             truthValues[index] = !!v;
             callback(err);
         });
     }, function (err) {
         if (err) return callback(err);
-        callback(null, filter(arr, function (_, index) {
-            return truthValues[index];
-        }));
+        var result = [];
+        each(coll, function(_, index) {
+            if (truthValues[index] === true) {
+                result.push(coll[index]);
+            }
+        });
+        callback(null, result);
     });
 }