So siehts ganz gut aus !

node_modules/es5-ext/object/map.js

@@ -0,0 +1,14 @@
+"use strict";
+
+var callable = require("./valid-callable")
+  , forEach  = require("./for-each")
+  , call     = Function.prototype.call;
+
+module.exports = function (obj, cb /*, thisArg*/) {
+	var result = {}, thisArg = arguments[2];
+	callable(cb);
+	forEach(obj, function (value, key, targetObj, index) {
+		result[key] = call.call(cb, thisArg, value, key, targetObj, index);
+	});
+	return result;
+};