How come a count of a range becomes 0 before a foreach?

[Steven Schveighoffer]

On 4/9/23 9:16 AM, Ali Çehreli wrote:
> On 4/8/23 21:38, ikelaiah wrote:
> 
>  > I will modify the code to construct it twice.
> 
> Multiple iterations of dirEntries can produce different results, which 
> may or may not be what your program will be happy with.
> 
> Sticking an .array at the end will iterate a single time and maintain 
> the list forever because .array returns an array. :)
> 
>    auto entries = dirEntries(/* ... */).array;

I'd be cautious of that. I don't know what the underlying code uses, it 
may reuse buffers for e.g. filenames to avoid allocation.

If you are confident the directory contents won't change in that 
split-second, then I think iterating twice is fine.

-Steve