How can I make var a = add(2)(3); //5 work?

Question

I want to make this syntax possible:

var a = add(2)(3); //5

based on what I read at http://dmitry.baranovskiy.com/post/31797647

I\

Answer 1

try this will help you in two ways add(2)(3) and add(2,3)

1.)

 function add(a){ return function (b){return a+b;} }

    add(2)(3) // 5

2.)

function add(a,b){
        var ffffd = function (b){return a+b;};
        if(typeof b =='undefined'){
            return ffffd;
        }else{
            return ffffd(b);
        }
    }

add(2)(3) // 5
add(2,3) // 5