Go duck typing

gistfile1.txt

package main

import (
	"fmt"
)

type Duck interface {
	Quak()
	Walk()
}

func QuakAndWalk(duck Duck) {
	duck.Quak()
	duck.Walk()
}

type Chicken struct{}

func (c *Chicken) Quak() {
	fmt.Println("Chicken quaking")
}

func (c *Chicken) Walk() {
	fmt.Println("Chicken walking")
}

func main() {
	var c Duck
	c = &Chicken{}
	QuakAndWalk(c)
}