simplify index tracking

caolan · Jun 1, 2016 · 611a442 · 611a442
1 parent 5f6e76d
commit 611a442
Showing 1 changed file with 4 additions and 11 deletions.
diff --git a/lib/internal/map.js b/lib/internal/map.js
@@ -1,23 +1,16 @@
-import isArrayLike from 'lodash/isArrayLike';
-import getIterator from './getIterator';
 import noop from 'lodash/noop';
-import okeys from 'lodash/keys';
-import indexOf from 'lodash/_baseIndexOf';
 import once from './once';
 
 export default function _asyncMap(eachfn, arr, iteratee, callback) {
     callback = once(callback || noop);
     arr = arr || [];
     var results = [];
-    var keys;
-    if (!isArrayLike(arr) && !getIterator(arr)) {
-        keys = okeys(arr);
-    }
+    var counter = 0;
 
-    eachfn(arr, function (value, index, callback) {
+    eachfn(arr, function (value, _, callback) {
+        var index = counter++;
         iteratee(value, function (err, v) {
-            var idx = keys ? indexOf(keys, index, 0) : index;
-            results[idx] = v;
+            results[index] = v;
             callback(err);
         });
     }, function (err) {