聊聊golang的defer

// f returns 42
func f() (result int) {
    defer func() {
        // result is accessed after it was set to 6 by the return statement
        result *= 7
    }()
    return 6
}

func f() int {
    result := 6
    defer func() {
        // result is accessed after it was set to 6 by the return statement
        result *= 7
    }()
    return result
}

func multiDefer() {
    for i := 3; i > 0; i-- {
        defer func(n int) {
            fmt.Print(n, " ")
        }(i)
    }

    for i := 3; i > 0; i-- {
        defer fmt.Print(i, " ")
    }
}

var fc func() string

func main() {
    fmt.Println("hello")
    defer fc()
}

func main() {
    for i := 3; i > 0; i-- {
        defer func() {
            fmt.Print(i, " ")
        }()
    }
}