From b3a373a7166716bacef4643ad35254bd1993b3d5 Mon Sep 17 00:00:00 2001
From: Jeremy Ashkenas <jashkenas@gmail.com>
Date: Mon, 20 Dec 2010 17:39:57 -0500
Subject: [PATCH] safer but slower toArray fallback, in light of .callee
 throwing in strict mode.

---
 underscore.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/underscore.js b/underscore.js
index 1f18e1e61..163268888 100644
--- a/underscore.js
+++ b/underscore.js
@@ -590,7 +590,7 @@
   // Is a given value an array?
   // Delegates to ECMA5's native Array.isArray
   _.isArray = nativeIsArray || function(obj) {
-    return !!(obj && obj.concat && obj.unshift && !obj.callee);
+    return toString.call(obj) === '[object Array]';
   };
 
   // Is a given variable an arguments object?