golang接口简单应用

package main

import (
	"fmt"
	"math/rand"
	"sort"
)

//Hero结构体
type Hero struct {
	Name string
	Age  int
}

//Hero结构体切片
type HeroSlice []Hero

//实现interface接口
func (hs HeroSlice) Len() int {

	return len(hs)
}

//Less方法就是决定使用什么标准进行排序
//按Hero年龄从小到大排序
func (hs HeroSlice) Less(i, j int) bool {
	return hs[i].Age < hs[j].Age
}
func (hs HeroSlice) Swap(i, j int) {
	//完成交换
	temp := hs[i]
	hs[i] = hs[j]
	hs[j] = temp
	//hs[i], hs[j] = hs[j], hs[i]
}
func main() {

	var heroes HeroSlice
	for i := 0; i < 10; i++ {
		hero := Hero{
			Name: fmt.Sprintf("英雄%d", rand.Intn(100)),
			Age:  rand.Intn(100),
		}
		//将hero append到heroes切片
		heroes = append(heroes, hero)
	}
	fmt.Println("排序前的顺序")
	for _, v := range heroes {
		fmt.Println(v)
	}

	//调用sort.Sort
	sort.Sort(heroes)
	fmt.Println("排序后的顺序")
	for _, v := range heroes {
		fmt.Println(v)
	}
}