Destructuring.js

function calcValues(a, b) {
  return [
    a + b,
    a - b,
    a * b,
    a / b
  ]
}

const [sum, sub = 'Вычитания нет', mult, ...other] = calcValues(42, 10)
// const sum = result[0]
// const sub = result[1]
// const [sum, sub] = result

console.log(sum, mult, other, sub)

// Objects
const person = {
  name: 'Max',
  age: 20,
  address: {
    country: 'Russia',
    city: 'Moscow'
  }
}

// const name = person.name
const {
  name: firstName = 'Без имени',
  age,
  car = 'Машины нет',
  address: {city: homeTown, country}
} = person

// const {name, ...info} = person
// console.log(name, info)

function logPerson({name: firstName = '111', age}) {
  console.log(firstName + ' ' + age)
}


logPerson(person)