Swift 5.1: Classes Cheat Sheet

class Person {
  let name: String
  // Class initializer
  init(name: String) {
  self.name = name
  }

  // Using deinit to perform object's resources cleanup
  deinit {
  print("Perform the deinitialization")
  }

  var numberOfLaughs: Int = 0
  func laugh() {
  numberOfLaughs += 1

  // Define a computed property
  var isHappy: Bool {
  return numberOfLaughs > 0
  }
}

let david = Person(name: "David")
david.laugh()
let happy = david.isHappy