Example of Go composition

gistfile1.go

// Compare to https://gist.github.com/jaekwon/8025b9f3a482b3219a21

package main

import "fmt"

type Human struct{}

func (h Human) walk()     { h.moveFeet() }
func (h Human) moveFeet() { fmt.Println("Human.walkFeet") }

type Dork struct {
	Human // embedded struct, so Human methods are exposed on Dork.
}

func (d Dork) moveFeet() { fmt.Println("Dork.walkFeet") }

func main() {
	d := Dork{}
	d.walk()           // Human.walkFeet
	d.moveFeet()       // Dork.walkFeet
	d.Human.moveFeet() // Human.walkFeet
}