gistfile1.txt

type Message = number | true | 'goodbye'

const message1 = 100 

const message2 = true

const message3 = 'goodbye'

const response: Message[] = [true, 'goodbye', true, 100, 42]
const firstResponse = response[0]

type MyTuple = [description: string, count: number, result: boolean, status: 'OK']
const myTuple1: MyTuple = ['1', 2, false, 'OK']
const firstMyTuple = myTuple1[0]
const secondMyTuple = myTuple1[1]



// interface Airplane extends Vehicle {
//   wings: number
// }
// // console.log(Airplane)
// const airplane: Airplane = {
//   wings: 2,
//   speed: 1000,
//   position: 30000,
//   maker: 'Boeing',
//   started: false
// }

enum MenuItem {
  Salad = 'Salad',
  Burger = 'Burger',
  Cupcake = 'Cupcake'
}
// console.log(MenuItem)

const order: MenuItem = MenuItem.Salad
// console.log(order)

// const x: any = { label: ['true'] }

function announce (user: string) {
  console.log(`${user} is ready`)
  const random = Math.random()

  if (random > 0.5) {
    return 200
  }

  return user
}
// const result = announce('hello')
interface Vehicle {
  speed: number
  position: number
  maker: string
  started: boolean
}
const hovercraft: Vehicle = {
  speed: 50,
  position: 0,
  maker: 'GE',
  started: false
}
function start (vehicle: Vehicle): boolean {
  vehicle.started = true
  return vehicle.started
}
function drive (vehicle: Vehicle) {
  if (!vehicle.started) {
    throw new Error('Start the vehicle first please')
  }
  vehicle.position += vehicle.speed
  return vehicle.position
}
start(hovercraft)
const result = drive(hovercraft)
console.log(hovercraft)