Some functional concepts implemented in js

currying.js

'use strict';

const curry = (f) => {
  const argc = f.length;
  if (argc === 1) {
    return f;
  }
  return (a) => curry(f.bind(null, a), argc - 1);
};

const add3 = (a, b, c) => {
  return a + b - c;
};

const add3Curried = curry(add3);
const result = add3Curried(1)(2)(5);
console.log(result);