Duck Typing in GoLang - Lightning Talk Code

go_duck.go

	package main

	import "fmt"

	type Animal interface {
		sound() string
		getName() string
	}

	func makeSound(a Animal) string {
	  return a.sound()
	}

	type Dog struct {
		name string
	}

	func (d *Dog) sound() string {
		return "Woof!"
	}

	func (d *Dog) getName() string {
		return d.name
	}

	type Duck struct {
		name string
	}

	func (d *Duck) sound() string {
		return "Quack!"
	}

	func (d *Duck) getName() string {
		return d.name
	}


  func main() {
	  var dog *Dog = new(Dog)
	  var duck *Duck = new(Duck)

	  dog.name = "Brewster"
	  duck.name = "Donald"

	  fmt.Println(makeSound(dog))
	  fmt.Println(makeSound(duck))
  }