From 2f369f8eca4add2e901ddc8f344c70665ba0a414 Mon Sep 17 00:00:00 2001
From: Jeremy Ashkenas <jashkenas@gmail.com>
Date: Tue, 18 Jan 2011 16:34:33 -0500
Subject: [PATCH] Fixing #95 ... Maloptimization of _.keys for sparse arrays.

---
 underscore.js | 1 -
 1 file changed, 1 deletion(-)

diff --git a/underscore.js b/underscore.js
index ec9c46277..7c25ec41a 100644
--- a/underscore.js
+++ b/underscore.js
@@ -501,7 +501,6 @@
   // Retrieve the names of an object's properties.
   // Delegates to **ECMAScript 5**'s native `Object.keys`
   _.keys = nativeKeys || function(obj) {
-    if (_.isArray(obj)) return _.range(0, obj.length);
     var keys = [];
     for (var key in obj) if (hasOwnProperty.call(obj, key)) keys[keys.length] = key;
     return keys;