golang 结构体相关函数

1、定义函数接口，具体函数由使用者定义

func main() {
    dog := Dog{
        Name: "Fido",
        SayHello: func(cmd *Dog, args []string) {
            fmt.Printf("Hello My name is %s, %s\n", cmd.Name, strings.Join(args, " "))
        },
    }
    dog.SayHello(&dog, []string{"What's your name"})
}

type Dog struct {
    Name string
    SayHello func(cmd *Dog, args []string)
}

2、直接为结构体添加函数

func main() {
    dog := Dog{
        Name: "Fido",
    }
    dog.SayHello([]string{"What's your name"})
}
type Dog struct {
    Name string
}
func (d *Dog) SayHello(args []string) {
    fmt.Printf("Hello My name is %s, %s\n", d.Name, strings.Join(args, " "))
}