curry_ex2.js

const curry = (func) => {
  return (a) => {
    return (b) => {
      return (c) => {
        return func(a, b, c);
      }
    }
  }
}

const add = (a, b, c) => a + b + c;

console.log(add(1, 2, 3)); // 6

const f = curry(add);
/* 
  Our curry function should be able to pull off 
  something that lets us do this!
*/
const f1 = f(1);
const f2 = f1(2);
const res = f2(3); // in the end calls add(1, 2, 3) giving 6.

/* 
  You can see how the previous arguments are stored
  in the scope of the returned function
*/

console.log(res); // 6