messages-communicating-objects.js

(new Number()).toString()
// '0'

(new Boolean()).toString()
// 'false'

(new Array('Hello', 'World')).toString()
// 'Hello','World'

(new Date('2025-05-03T23:11:10.312Z')).toString()
// 'Sat May 03 2025 20:11:10 GMT-0300 (Brasilia Standard Time)'

(new Error('Boom!')).toString()
// 'Error: Boom!'


class Money {
  constructor(amount, currency = '$') {
    this.amount = amount
    this.currency = currency
  }

  toString() {
    return `${this.currency}${this.amount}`
  }
}

class PhoneNumber {
  constructor(aNANP) {
    this.phoneNumber = aNANP
  }

  toString() {
    return this.phoneNumber.replace(/(\d{3})(\d{3})(\d{4})/, '($1) $2-$3')
  }
}

(new Money(5)).toString()
// '$5'

(new PhoneNumber('2607768461')).toString()
// '(260) 776-8461'