bind_hack.js

var hugeNum = Math.pow(2, 51);
 
function generateArguments(numberOfArgs) {
	var letters = [];
	while(numberOfArgs--) letters.push("arg_" + Math.ceil(Math.random() * hugeNum));
	return letters;
}
 
Function.prototype.partial = function partial() {
	var fn = this;
	var argumentsToApply = Array.prototype.slice.call(arguments);
	var argumentsLeft = Math.max(0, fn.length - argumentsToApply.length);
	var argList = generateArguments(argumentsLeft);
	var functionCode = 'return function ';
	functionCode += fn.name + '(';
	functionCode += argList.join(', ') + ') {\n';
	functionCode += 'var args = Array.prototype.slice.call(arguments);\n';
	functionCode += 'args = suppliedArguments.concat(args);\n';
	functionCode += 'return fn.apply(this, args);\n';
	functionCode += '};'
 
	return Function("suppliedArguments", "fn", functionCode)(argumentsToApply, this);
};