通过传递其指针来更改切片

Question

I have a slice that I want to change (for example i want to remove the first element) using a function. I thought to use a pointer, but I still can't index it. What am I doing wrong?

Playground link:

func change(list *[]int) {
    fmt.Println(*list)
    *list = *list[1:] //This line screws everything up
}

var list = []int{1, 2, 3}

func main() {
    change(&list)
}

Answer 1

You need to use (*list).

func change(list *[]int) {
    *list = (*list)[1:]
}

or a different approach that's usually more go idomatic:

func change(list []int) []int {
    return list[1:]
}

<kbd>playground</kbd>