Empty non-null Associative Arrays should be trivial or even the default.

[Mike Parker]

On Tuesday, 3 August 2021 at 16:28:03 UTC, Rekel wrote:

>
> Also a small sidequestion; how come remove is part of AA's 
> definition while the removal of items from dynamic lists is 
> part of the library instead?
>

AAs have to do internal bookkeeping, with the buckets and such, 
that dynamic arrays do not have to worry about. So they've had 
their own remove function from the beginning.

As I recall, dynamic arrays didn't have a remove function back in 
the D1 days. Removal was a matter of iteration and slicing:

```d
foreach(i, e; arr)
{
     if(e == toRemove)
     {
         arr = a[0 .. i] ~ a[i+1 .. $];
         break;
     }
}
```

And the remove function we have now is not specifically for 
dynamic arrays. It's for ranges. Dynamic arrays happen to be 
ranges (courtesy of the range API implemented for them in 
std.array) so you can use them with that function and any 
function in std.algorithm.

Static arrays and associative arrays are not ranges.