[Golang]struct pointer

gistfile1.txt

#https://play.golang.org/p/bGs5TPZksJ
#http://nathanleclaire.com/blog/2014/08/09/dont-get-bitten-by-pointer-vs-non-pointer-method-receivers-in-golang/
import "fmt"

type foo struct {
	name string
}

type bar struct {
	f    *foo
	name string
}

func (b bar) changeNames() {
	b.name = "changed"
	b.f.name = "changed"
}

type baz struct {
	f    foo
	name string
}

func (b baz) changeNames() {
	b.name = "changed"
	b.f.name = "changed"
}

func main() {

	b := bar{name: "bar", f: &foo{name: "foo"}}
	fmt.Println(b.name, b.f.name)
	b.changeNames()
	fmt.Println(b.name, b.f.name)

	bz := baz{name: "baz", f: foo{name: "foo2"}}
	fmt.Println(bz.name, bz.f.name)
	bz.changeNames()
	fmt.Println(bz.name, bz.f.name)

}