call a function curried instead of normally

curry.js

Function.prototype.curry = function(){
  
  var length = getParamNames(this); //get arguments length
  if(arguments.length === length){ //if all the arguments are provided
    return this.apply(null, arguments); //call itself with the provided arguments
  } else { // if not enough arguments provided 
    var outterArgs = argumentsToArray(arguments); //convert the argument 'array-like object' into a real array
    return cacheOutterArguments(outterArgs, this); //cache the arguments in a function, 
    //pass original 'this' and return a new function
  }
  
  function cacheOutterArguments(outterArgsArray, self){
    //use closure to cache outter arguments
    return function(){
      // concat the previous arguments and next arguments togeather
      var bothArgsArray = outterArgsArray.concat(argumentsToArray(arguments));
      //recursevly call the same function, with the same 'this' as before and the new arguments
      return Function.prototype.curry.apply(self, bothArgsArray);
    };
  }
  
  
  
  function getParamNames(func) { // original source http://stackoverflow.com/questions/1007981/how-to-get-function-parameter-names-values-dynamically-from-javascript
    var ARGUMENT_NAMES = /([^\s,]+)/g; //this will isolate the argument names
    //getting the argument names back in an array will allow us to track how many arguments the function takes
    var fnStr = func.toString();
    var result = fnStr.slice(fnStr.indexOf('(')+1, fnStr.indexOf(')')).match(ARGUMENT_NAMES);
    if(result === null){
      result = [];
    }
    return result.length;
  }
  
  function argumentsToArray(args) {
    var argArray = [];
    for(var i = 0; i < args.length; i++){
      argArray.push(args[i]);
    }
    return argArray;
  }
};