PATs-Dynamic-Dispatch-2.swift

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

class Cow: Animal {
    
    let name: String
    
    init(withName name: String) {
        self.name = name
    }
    
    func walk() {
        print("\(name) is walking in the farm.")
    }
}

class Tiger: Animal {
    
    let name: String
    
    init(withName name: String) {
        self.name = name
    }
    
    func walk() {
        print("\(name) is walking in the jungle.")
    }
}

// Create concrete Animal instant
let myTiger = Tiger(withName: "My Tiger")
let myCow = Cow(withName: "My Cow")
let animalArray: [Animal] = [myTiger, myCow]

for animal in animalArray {
    animal.walk()
    // Output:
    // My Tiger is walking in the jungle.
    // My Cow is walking in the farm.
}