1 files changed, 51 insertions, 0 deletions
diff --git a/js/src/Ice/MapUtil.js b/js/src/Ice/MapUtil.js
new file mode 100644
index 00000000000..d8511839085
--- /dev/null
+++ b/js/src/Ice/MapUtil.js
@@ -0,0 +1,51 @@
+// **********************************************************************
+//
+// Copyright (c) 2003-2016 ZeroC, Inc. All rights reserved.
+//
+// This copy of Ice is licensed to you under the terms described in the
+// ICE_LICENSE file included in this distribution.
+//
+// **********************************************************************
+
+const Ice = require("../Ice/ModuleRegistry").Ice;
+
+class MapUtil
+{
+    static equals(m1, m2)
+    {
+        if(m1 === m2)
+        {
+            return true;
+        }
+        else if(m1.size != m2.size)
+        {
+            return false;
+        }
+        else
+        {
+            for(let [key, value] of m1)
+            {
+                if(value === undefined)
+                {
+                    if(!m2.has(key))
+                    {
+                        return false;
+                    }
+                    else if(m2.get(key) !== value)
+                    {
+                        return false;
+                    }
+                }
+                else if(m2.get(key) !== value)
+                {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+}
+
+Ice.MapUtil = MapUtil;
+
+module.exports.Ice = Ice;