Curry example for future reference

gistfile1.js

/**
 first arg is a function, second is the number of arguments
 to expect before executing
 (N.B.  The second arg is optional and will default to the arity
 of the function if not provided)
*/

function curry (fn, numArgs) {
  var numArgs = numArgs || fn.length;
  
  function makeCurried (previousArgs) {
    return function () {
      var args = previousArgs.concat(Array.prototype.slice.call(arguments));
      
      if (args.length < numArgs) return makeCurried(args);
      return fn.apply(this, args);
    }
  }
  return makeCurried([]);
}