package main

import (
	"fmt"
	"math/rand"
	"regexp"
	"time"
)

type Mac struct {
	Flag string
}

func NewMac(flag string) Mac {
	return Mac{Flag:flag}
}

func (m *Mac)Set(macAddr string)bool{
	reg := regexp.MustCompile("^([A-Fa-f0-9]{2}"+m.Flag+"){5}[A-Fa-f0-9]{2}$")
	result :=reg.Find([]byte(macAddr))
	return len(result) != 0
}

func main(){
	mac := NewMac("#")
	fmt.Println(mac.Set("11-22-33-44-55-66"))
	fmt.Println(mac.Set("11#22#33#44#55#66"))
	fmt.Println(mac.Set("11#22#33#44#F5#66"))
	fmt.Println(mac.Set("11#22#33#44#F5#6G"))
	fmt.Println(mac.Set("11#22#33#44#55#"))
	fmt.Println(mac.Set("11#22#33#44#55#66#dy"))
}

func test(l int) string{
		str := "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
		bytes := []byte(str)
		var result []byte
		r := rand.New(rand.NewSource(time.Now().UnixNano()+int64(rand.Intn(10))))
		for i := 0; i < l; i++ {
		result = append(result, bytes[r.Intn(len(bytes))])
	}
		return string(result)

}