package main

import "fmt"

func main() {
	a := []interface{}{2, 4, 5}
	b := []interface{}{3, 2, 5, 6}

	same, diff := getSameDiffMen(a, b)
	fmt.Println("获取相同元素：", same, " 不同元素：", diff)

	add, del := getAddDelMen(a, b)
	fmt.Println("获取增加元素：", add, " 删减元素：", del)
}

func getAddDelMen(old, new []interface{}) (add, del []interface{}) {
	temp := make(map[interface{}]interface{})
	for i := 0; i < len(old); i++ {
		for j := i; j < len(new); j++ {
			if old[i] != new[j] {
				if _, ok := temp[old[i]]; !ok { // 旧数组有但新数组没有，需要删除，标记为1
					temp[old[i]] = 1
				}
				if _, ok := temp[new[j]]; !ok { // 旧数组没有但新数组有，需要增加，标记为2
					temp[new[j]] = 2
				}
			} else {
				temp[old[i]] = 3 // 新旧数组都有，标记为#
			}
		}
	}
	// 整理结果
	for k, v := range temp {
		if v == 1 {
			del = append(del, k)
		}
		if v == 2 {
			add = append(add, k)
		}
	}
	return
}

func getSameDiffMen(old, new []interface{}) (same, diff []interface{}) {
	temp := make(map[interface{}]interface{})
	for i := 0; i < len(old); i++ {
		for j := i; j < len(new); j++ {
			if old[i] != new[j] {
				if _, ok := temp[old[i]]; !ok {
					temp[old[i]] = 1
				}
				if _, ok := temp[new[j]]; !ok {
					temp[new[j]] = 1
				}
			} else {
				temp[old[i]] = 2 // 新旧数组都有，标记为2
			}
		}
	}
	for k, v := range temp {
		if v == 1 {
			diff = append(diff, k)
		}
		if v == 2 {
			same = append(same, k)
		}
	}
	return
}