Removing items from an Array

[Mars]

On Friday, 17 February 2012 at 10:13:00 UTC, Jonathan M Davis 
wrote:
> I don't believe that removing elements from an AA while 
> iterating over it is safe.
>
> - Jonathan M Davis

Well, no. But from my experience it's okay from bottom to top... 
at least in other languages.
What would be the alternative? Maybe build a new array while 
iterating, and set it after the loop?