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path: root/go/robot-name/robot_name.go
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package robotname

import (
	"math/rand"
	"time"
)

func init() {
	rand.Seed(time.Now().UnixNano())
}

type Robot struct {
	name string
}

func randLetter() string { return string('A' + rune(rand.Intn(26))) }
func randNumber() string { return string('0' + rune(rand.Intn(10))) }

func newName() string {
	return randLetter() + randLetter() +
		randNumber() + randNumber() + randNumber()
}

func (r *Robot) Name() string {
	if r.name == "" {
		r.name = newName()
	}
	return r.name
}

func (r *Robot) Reset() {
	r.name = ""
}