Currying in just 6 lines of Javascript code

curry.js

// this helper function takes as argument the function that will be curried
function curry(func) {
  return function accumulator() {
    var args = [].slice.call(arguments);
    return args.length < func.length ? accumulator.bind.apply(accumulator, [null].concat(args)) : func.apply(null, args);
  };
}

// Use it: first create two function that will be curried
function add(a,b,c) {
  return a + b + c;
}

function greet(greeting, name) {
  return [greeting, name].join(' ');
}

// curry greet() 
var curryGreet = curry(greet);
var sayHi = curryGreet('Hi');
console.log(sayHi('Danny'));  // Hi Danny

// curry add()
var curryAdd = curry(add);
var add2 = curryAdd(1,2);
console.log(add2(3));  // 6