LeeKahSeng

protocol MyProtocol {
    var myVar1: String { get set }
    var myVar2: String { get }
}

struct MyStruct: MyProtocol {
    var myVar1 = ""
    var myVar2 = ""
}

LeeKahSeng

var testStruct = MyStruct()
testStruct.myVar1 = "test var1"
testStruct.myVar2 = "test var2"

print(testStruct.myVar1) // "test var1"
print(testStruct.myVar2) // "test var2"

LeeKahSeng

var testProtocol: MyProtocol = MyStruct()
testProtocol.myVar1 = "test var1" // No error
testProtocol.myVar2 = "test var2" // error: cannot assign to property: 'myVar2' is a get-only property

LeeKahSeng

protocol Flyable {
    
    /// Limit the speed of flyable
    var speedLimit: Int { get set }
    
    func fly()
}

extension Flyable {
    func fly() {

LeeKahSeng

class Bird: Flyable {
    var speedLimit = 20
}

LeeKahSeng

protocol Flyable {
    // Make speedLimit only gettable
    var speedLimit: Int { get }
    
    func fly()
}

class Bird: Flyable {
    // Make speedLimit private
    private(set) var speedLimit = 20

LeeKahSeng

protocol Flyable {
    
    /// Limit the speed of flyable
    var speedLimit: Int { get }
    
    func fly()
}

extension Flyable {
    func fly() {

LeeKahSeng

protocol Animal {
  
    associatedtype FoodType
    func eat(food: FoodType)
}

LeeKahSeng

protocol Animal {
    
    var name: String { get }
    func walk()
}

class Cow: Animal {
    
    let name: String
    

LeeKahSeng

protocol Animal {
    
    var name: String { get }
    func walk()
    
    associatedtype FoodType
    func eat(food: FoodType)
}

class Cow: Animal {