Learn SwiftUI (Day 10/10)

import Cocoa // ## Define struct struct Employee { let name: String var vacationRemaining: Int mutating func takeVacation(days: Int) { if vacationRemaining > days { vacationRemaining -= days print("I'm going on vacation!") print("Days remaining: \(vacationRemaining)") } else { print("Oops! There aren't enough days remaining.") } } } // ## Computed Properties with getter and setter struct Employee2 { let name: String var vacationAllocated = 14 var vacationTaken = 0 var vacationRemaining: Int { // getter get { vacationAllocated - vacationTaken } // setter -> even we have a setter here, no `mutating` needs to be added set { vacationAllocated = vacationTaken + newValue } } } // ## Property observers // willSet and didSet struct App { var contacts = [String]() { // newValue and oldValue are built-in variable in observers willSet { print("Current value is: \(contacts)") print("New value will be: \(newValue)") } didSet { print("There are now \(contacts.count) contacts.") print("Old value was \(oldValue)") } } } // ## custom initializers // explicitly define `init` function - no `func` needed, and you can use `self.` struct Player { let name: String let number: Int init(name: String) { self.name = name number = Int.random(in: 1...99) } }