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

Concept of CLOSURES can be used in this case.
The function "add" returns another function. The function being returned can access the variable in the parent scope (in this case variable a).

function add(a){

    return function(b){
        console.log(a + b);
    }

}


add(2)(3);

Here is a link to understand closures http://www.w3schools.com/js/js_function_closures.asp