Proper way to accept either static or dynamic array as a parameter

[Alex Bryan]

On Sunday, 12 September 2021 at 02:49:48 UTC, jfondren wrote:
> On Sunday, 12 September 2021 at 02:44:36 UTC, Alex Bryan wrote:
>> `T[] dynArr` can be passed (by reference) to a function that 
>> takes `ref T[] data` but `T[10] data` cannot? Why not?
>
> ```d
> void add1(ref int[] nums) {
>     nums ~= 1;
> }
>
> unittest {
>     int[] nums;
>     nums.add1;
>     nums.add1;
>     nums.add1;
>     assert(nums == [1, 1, 1]);
> }
> ```
>
> the `ref` allows `add1` to extend the length of the slice 
> passed to it, with potential reallocation. This doesn't make 
> sense with a static array whose length can't be modified.

Makes sense. Thank you