go interface func

go-interface-func.go

//http://www.flysnow.org/2016/12/30/golang-function-interface.html
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) {
	if m != nil && len(m) > 0 {
		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 selfInfo(k, v interface{}) {
	fmt.Printf("大家好,我叫%s,今年%d岁\n", k, v)
}
func main() {
	persons := make(map[interface{}]interface{})
	persons["张三"] = 20
	persons["李四"] = 23
	persons["王五"] = 26
	EachFunc(persons, selfInfo)
}