curry

currying.js

/**
 * curry
 * 
 * var curried = curry(function(a, b, c) {
 *   console.log(a+b+c);
 * });
 *
 *
 * curried(2)(2)(2); // => 6
 * curried(2,2)(2);  // => 6
 * curried(2,2,2);   // => 6
 *
 */

function curry(fn) {
  var totalArgsLength = fn.length;
  var params = [];

  function genCurried() {
    var args = [].slice.call(arguments);
    params = params.concat(args);

    if (params.length < totalArgsLength) {
      return genCurried;
    }
    else {
      return fn.apply(this, params);
    }  
  }

  return genCurried;
}