From 81c9dc2f1fdd324846ddaa0c0fe255be114f91e6 Mon Sep 17 00:00:00 2001
From: Kevin Malakoff <xmann.intl@gmail.com>
Date: Thu, 6 Oct 2011 18:23:42 +0200
Subject: [PATCH] yuchi spotted duplication

---
 underscore.js | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/underscore.js b/underscore.js
index 610533673..73ffa58ce 100644
--- a/underscore.js
+++ b/underscore.js
@@ -641,9 +641,9 @@
     // Unwrap any wrapped objects.
     if (a._chain) a = a._wrapped;
     if (b._chain) b = b._wrapped;
-    // One of them implements an isEqual()
-    if (a.isEqual) return a.isEqual(b);
-    if (b.isEqual) return b.isEqual(a);
+    // Invoke a custom `isEqual` method if one is provided.
+    if (_.isFunction(a.isEqual)) return a.isEqual(b);
+    if (_.isFunction(b.isEqual)) return b.isEqual(a);
     // Compare object types.
     var typeA = typeof a;
     if (typeA != typeof b) return false;
@@ -675,8 +675,6 @@
     }
     // Ensure that both values are objects.
     if (typeA != 'object') return false;
-    // Invoke a custom `isEqual` method if one is provided.
-    if (_.isFunction(a.isEqual)) return a.isEqual(b);
     // Assume equality for cyclic structures. The algorithm for detecting cyclic structures is
     // adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
     var length = stack.length;