1 files changed, 35 insertions, 1 deletions
diff --git a/lib/eachOf.js b/lib/eachOf.js
index 4d453c5..43accc7 100644
--- a/lib/eachOf.js
+++ b/lib/eachOf.js
@@ -1,5 +1,36 @@
+import isArrayLike from 'lodash/isArrayLike';
+
 import eachOfLimit from './eachOfLimit';
 import doLimit from './internal/doLimit';
+import noop from 'lodash/noop';
+import once from 'lodash/once';
+import onlyOnce from './internal/onlyOnce';
+
+// eachOf implementation optimized for array-likes
+function eachOfArrayLike(coll, iteratee, callback) {
+    callback = once(callback || noop);
+    var index = 0,
+        completed = 0,
+        length = coll.length;
+    if (length === 0) {
+        callback(null);
+    }
+
+    function iteratorCallback(err) {
+        if (err) {
+            callback(err);
+        } else if (++completed === length) {
+            callback(null);
+        }
+    }
+
+    for (; index < length; index++) {
+        iteratee(coll[index], index, onlyOnce(iteratorCallback));
+    }
+}
+
+// a generic version of eachOf which can handle array, object, and iterator cases.
+var eachOfGeneric = doLimit(eachOfLimit, Infinity);
 
 /**
  * Like [`each`]{@link module:Collections.each}, except that it passes the key (or index) as the second argument
@@ -42,4 +73,7 @@ import doLimit from './internal/doLimit';
  *     doSomethingWith(configs);
  * });
  */
-export default doLimit(eachOfLimit, Infinity);
+export default function(coll, iteratee, callback) {
+    var eachOfImplementation = isArrayLike(coll) ? eachOfArrayLike : eachOfGeneric;
+    eachOfImplementation(coll, iteratee, callback);
+}