英文:
Changing a slice by passing its pointer
问题
我有一个切片，我想使用一个函数来改变它（例如，我想删除第一个元素）。我想使用指针，但是我仍然无法对其进行索引。我做错了什么？
func change(list *[]int) {
fmt.Println(*list)
*list = *list[1:] //这一行搞砸了一切
}
var list = []int{1, 2, 3}
func main() {
change(&list)
}
英文:
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?
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)
}
答案1
得分: 3
你需要使用(*list)。
func change(list *[]int) {
*list = (*list)[1:]
}
或者使用另一种通常更符合Go语言习惯的方法：
func change(list []int) []int {
return list[1:]
}
[kbd]playground/kbd
英文:
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:]
}
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