How to check whether an empty array variable is null?

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On Saturday, 10 October 2015 at 20:07:11 UTC, Jonathan M Davis 
wrote:
> It basically didn't bother to allocate an array on the heap, 
> because you asked for one with a length of zero. 
> Efficiency-wise, it makes no sense to allocate anything. You 
> wouldn't be doing anything with the memory anyway. The only way 
> that you're going to get an array of length 0 which doesn't 
> have a null ptr is to slice an array down to a length of 0.
>
> - Jonathan M Davis

Look at my second example.