No, they can occur more then onece.

Kalman Noel wrote:
> ilhamik:
> > hi,
> > I want to downcase a string but without specific parts.
> > for example:
> > msg = "THIS is a Text and (NO Change HERE) HELP"
>
> If the parentheses occur only once:
>
> if msg =~ /\(.*?\)/
>   $~.pre_match.downcase + $~[0] + $~.post_match.downcase
> end
> 
> Kalman