From 340f7e3acb689d949755993cd5d33d217d97b2d9 Mon Sep 17 00:00:00 2001
From: gensym <david@gensym.org>
Date: Sat, 4 May 2013 23:17:20 -0500
Subject: [PATCH] Format function now uses "instanceof" on a var rather than
 "typeof" on that var's call to determine if the variable is a function. This
 fixes an incompatibility with ClojureScript, which defines
 String.prototype.call as a function.

---
 moment.js                       |  2 +-
 test/moment/string_prototype.js | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 test/moment/string_prototype.js

diff --git a/moment.js b/moment.js
index 9b52be593..1b72884bc 100644
--- a/moment.js
+++ b/moment.js
@@ -597,7 +597,7 @@
         return function (mom) {
             var output = "";
             for (i = 0; i < length; i++) {
-                output += typeof array[i].call === 'function' ? array[i].call(mom, format) : array[i];
+                output += array[i] instanceof Function ? array[i].call(mom, format) : array[i];
             }
             return output;
         };
diff --git a/test/moment/string_prototype.js b/test/moment/string_prototype.js
new file mode 100644
index 000000000..d4712d1fc
--- /dev/null
+++ b/test/moment/string_prototype.js
@@ -0,0 +1,17 @@
+var moment = require("../../moment");
+
+exports.add = {
+    "string prototype overrides call" : function(test) {
+        test.expect(1);
+
+        var prior = String.prototype.call;
+        String.prototype.call = function() { return null;};
+
+        var b = moment(new Date(2011, 7, 28, 15, 25, 50, 125));
+        test.equal(b.format('MMMM Do YYYY, h:mm a'), 'August 28th 2011, 3:25 pm');
+
+        String.prototype.call = prior;
+        test.done();
+    }
+
+};
-- 
2.47.2