https://golang.org/doc/faq#nil_error
Am Donnerstag, 16. Februar 2017 16:58:18 UTC+1 schrieb dreyk:
>
> What do you expect as output of following code?
>
> package main
>
> import "fmt"
>
> type MyInterface interface {
> GetName() string
> }
> type MyInterfaceImpl struct {
> Name string
> }
> func (i *MyInterfaceImpl) GetName() string {
> return i.Name
> }
> func getNilMyInterface() MyInterface {
> return nil
> }
> func getNilMyInterfaceImpl() *MyInterfaceImpl {
> return nil
> }
> func main() {
> v := getNilMyInterface()
> if v == nil {
> if v = getNilMyInterfaceImpl(); v == nil {
> fmt.Println("Ok. This code is correct!")
> } else {
> fmt.Println("Opsss... It's not nil")
> fmt.Println(v.GetName())
> }
> }
> }
>
>
> Check yourself https://play.golang.org/p/PDbyjP7QcS
>
>
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