Zapping a dynamic string

[Cecil Ward]

On Tuesday, 4 July 2023 at 17:01:42 UTC, Cecil Ward wrote:
> I have a mutable dynamic array of dchar, grown by successively 
> appending more and more. When I wish to zap it and hand the 
> contents to the GC to be cleaned up, what should I do? What 
> happens if I set the .length to zero?

I do want to restart the .length at zero in any case as I’m going 
to begin the appending afresh, so I wish to restart from nothing.