So siehts ganz gut aus !

node_modules/es5-ext/object/ensure-integer.js

@@ -0,0 +1,9 @@
+"use strict";
+
+var toShortString = require("../to-short-string-representation")
+  , isInteger     = require("./is-integer");
+
+module.exports = function (num) {
+	if (!isInteger(num)) throw new TypeError(toShortString(num) + " is not a integer");
+	return Number(num);
+};