Javascript Currying

curry.js

Function.prototype.curry = function(){
  var func = this, args = Array.prototype.slice.call(arguments);
  return function(){
      return func.apply(this, args.concat(Array.prototype.slice.call(arguments)));
  }
};
 
var add = function(a,b){
    return a+b;
}
 
console.log('add(2,3)=', add(2,3));
 
var increment = add.curry(1);
 
console.log('increment(4)=',increment(4));