On Tue, Mar 10, 2009 at 11:19, howa <howac...@gmail.com> wrote:
> Hello,
>
> Consider the code:
> #===================
>
> use strict;
>
> my $a = 'a.jpg';
>
> if ($a =~ /(html|jpg)/gi) {
> print 'ok';
> }
>
> #===================
>
>
> Is the brucket "()" must be needed? Since I am not using back
> reference, are there a better way?
snip
Since you have no other patterns in the regex you do not need the
parentheses. If you had other patterns and wanted to avoid the
slowdown associated with backreferences you could use the
group-non-capturing parentheses:
/foo[.](?:html|jpg)/
--
Chas. Owens
wonkden.net
The most important skill a programmer can have is the ability to read.
--
To unsubscribe, e-mail: beginners-unsubscr...@perl.org
For additional commands, e-mail: beginners-h...@perl.org
http://learn.perl.org/
