On Wednesday 21 August 2002 05:13 pm, Reimer Behrends wrote:
> Slava Potsepnia (ViacheslavPotsepnia / scnsoft.com) wrote:
> >  Hi All!
> >
> >  I would like to know if it's possible to negate regexps in
> >  case-when-then-else-end. I.g.
>
> You can often use the negative lookahead operator to simulate that
> effect, as in:
>
>   case line
>   when /^(?!regex)/ then # expression does not occur at start of line
>     ...
>   when /\A(?!.*regex)/ then # expression does not occur anywhere
>     ...
>   end
>
> [...]
>
> 			Reimer Behrends

Thanks, Reimer.  I really need to learn more regex.  I'm keeping this email.