Golang invalid operation: arr[i] (type *[]int does not support indexing)

Golang invalid operation: arr[i] (type *[]int does not support indexing)

go语言调用数组指针的时候犯了个错，使用了以下方式赋值，结果报错“invalid operation: arr[i] (type *[]int does not support indexing)”
错误做法：

*arr[i]

正确做法：

(*arr)[i]

因为go会把 * arr[i] 当作 * (arr[i])