jskod

const heroes = []
heroes[0] = "batman"
heroes[1] = "spiderman";

//Function IIFE
(function IIFE() {
  console.log("Hello!")
})()

//Const IIFE
const IFEF = (() => {
  console.log("Hello")
})()

const foo = () => {
  var a = 1
  if (a >= 1) {
    const b = 2;
    console.log("yay")
  }
}
foo()


//Closure

const makeAdder = (x) => {
  const add = (y) => {
    return y + x
  }
  return add
}

const plusOne = makeAdder(1)
const plusTen = makeAdder(10)

console.log(plusOne(3))
console.log(plusOne(41))
console.log(plusTen(13))

//Modules

const User = () => {
  let username, password

  const doLogin = (user, pw) => {
    username = user
    password = pw
  }

  const publicAPI = {
    login: doLogin
  }
  return publicAPI
}

//Create a 'User' module instance
const fred = User()
fred.login("fred", "12Battery34!")