golang 基础

1.//对map中的struct赋值

type person struct {
	id   int
	name string
}

func main() {
	persons := make(map[int]person)
	persons[0] = person{1,"a"}

	log.Println(persons[0])

	v,ok := persons[0]
	if ok {
		v.id = 0
		persons[0] = v

	}
	log.Println(persons)

	persons1 := make(map[int]*person)
	persons1[0] = &person{1,"a"}

	log.Println(persons1[0],",persons1)

	_,ok = persons1[0]
	if ok {
		var p *person
		p = persons1[0]
		p.id = 5

		(*persons1[0]).id = 10
	}
	log.Println(persons1,persons1[0])
}