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                ## 結構體的值類型receiver和指針類型receiver ~~~ type Show interface { View() } type User struct { } func (u User) View() { fmt.Println("jack") } func main() { var u Show u = new(User) u.View() //雖然也可以調用View方法,但是我們要清除,這是golang編譯器幫我加上了"&", 這里只有值類型的receiver實現了Show接口,而指針類型并沒有 } ~~~ ## 接口類型封裝和隱藏具體類型和它的值,方法 ~~~ type Show interface { View() } type User struct { } func (u User) View() { fmt.Println("jack") } func (u User) Display() { fmt.Println("jack") } func main() { var u Show u = new(User) u.Display() //錯誤,即使具體類型有這個方法,也不能調用,因為被接口類型隱藏了 } ~~~
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