Golang接口型函数

package main

import (
    "fmt"
)

type Handler interface {
    Do(k, v interface{})
}

type HandlerFunc func(k, v interface{})

func (f HandlerFunc) Do(k, v interface{}) {
    f(k, v)
}

func Each(m map[interface{}]interface{}, h Handler) {
    for k, v := range m {
        h.Do(k, v)
    }
}

func EachFunc(m map[interface{}]interface{}, f func(k, v interface{})) {
    Each(m, HandlerFunc(f))
}

func SayHello(name, age interface{}) {
    fmt.Printf("Hello, I am %s, %d years old!\n", name, age)
}

func main() {
    students := make(map[interface{}]interface{})
    students["Marry"] = 20
    students["Tom"] = 23
    EachFunc(students, SayHello)
}