So siehts ganz gut aus !

node_modules/es5-ext/function/#/partial.js

@@ -0,0 +1,16 @@
+"use strict";
+
+var callable     = require("../../object/valid-callable")
+  , aFrom        = require("../../array/from")
+  , defineLength = require("../_define-length")
+
+  , apply = Function.prototype.apply;
+
+module.exports = function (/* …args*/) {
+	var fn = callable(this)
+	  , args = aFrom(arguments);
+
+	return defineLength(function () {
+		return apply.call(fn, this, args.concat(aFrom(arguments)));
+	}, fn.length - args.length);
+};