How to implement multiple function call in JavaScript?

Question

JavaScript

Is it realistic to get such a result or not? If yes, how?
console.log(add(1)(3)(5)(35)); // 44
There can be any number of calls.

Answer 1

Sum of arbitrary number of brackets

Answer 2

read about currying
sekrasoft.livejournal.com/60548.html

Answer 3

Unreal.

Answer 4

Here are some of the examples.
As far as I remember, it is necessary not toString, but valueOf to assign.
Check both options.

function sum(a) {

  var currentSum = a;

  function f(b) {
    currentSum += b;
    return f;
  }

  f.toString = function() {
    return currentSum;
  };

  return f;
}

alert( sum(1)(2) ); // 3
alert( sum(5)(-1)(2) ); // 6
alert( sum(6)(-1)(-2)(-3) ); // 0
alert( sum(0)(1)(2)(3)(4)(5) ); // 15