Re: alternation option end of string

On 2026-05-02 15:25, Bart Schaefer wrote:
> It wouldn't have worked even if you were using a regular expression,
> for the same reason that (s|) didn't do what you want.  In the
> comparison to the string "catszzz" the $ means the end of THAT string
> (that is, after the third "z").  It does NOT mean the "end of
> matching" up to that point.
A subtle point, and easily missed,  tx.  Anyway Roman's code seems leak 
proof so far and it's understandable.  But I would have expected 
something like the $ usable as I'd intended.  But if not, the essential 
point is that there's no limitation of function.