for...range要点

type T struct {
    n int
}

func main() {
    ts := [2]T{}
    for i, t := range ts {
        switch i {
        case 0:
            t.n = 3  // 被访问的是ts的副本
            ts[1].n = 9
        case 1:
            fmt.Print(t.n, " ")
        }
    }
    fmt.Print(ts)
}

func main() {
        h := make([]*int, 3)
        u := []int{1, 2, 3}
        for i, v := range u {
                h[i] = &v
        }

        for i := range h {
                fmt.Println(*h[i])
        }
}