ChatGPT3 response to "swift code exemplifying sandy metz style duck types"

swift code-exemplifying-sandy-metz-style-duck-types.gpt3

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swift code exemplifying sandy metz style duck types
Sure, here's an example of a Swift code that uses duck typing, in a style similar to that of Sandi Metz:

swift
Copy code
protocol Quackable {
    func quack() -> String
}

class Duck: Quackable {
    func quack() -> String {
        return "Quack!"
    }
}

class Person {
    func quackLikeADuck(duck: Quackable) -> String {
        return duck.quack()
    }
}

let duck = Duck()
let person = Person()

person.quackLikeADuck(duck: duck) // Output: "Quack!"
In this example, we have two classes - Duck and Person. Duck implements the Quackable protocol, which has a single method quack() that returns a string. Person has a method quackLikeADuck() that takes a Quackable object as an argument and calls its quack() method.

The beauty of duck typing is that the Person class doesn't care whether the object it receives is actually a Duck or any other class that implements the Quackable protocol - as long as it quacks like a duck (i.e. has a quack() method that returns a string), it will work just fine. This allows for more flexible and reusable code, since the Person class can work with any object that quacks like a duck, regardless of its specific implementation.