39 currying

curry.js

function curry(fn) {
  return function curried(...args) {
    if (args.length >= fn.length) {
      return fn.call(this, ...args)
    } else {
      return curried.bind(this, ...args)
    }
  }
}

const _add3 = (a, b, c) => a + b + c
const add3 = curry(_add3)

// console.log(add3(1)(2)(3))