Great stuff. Regexp objects rock. It worked perfectly and helped with some
other things too.
Thanks a lot Jeff.
CC
>From: Jeff 'japhy' Pinyan <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: claement claementson <[EMAIL PROTECTED]>
>CC: [EMAIL PROTECTED]
>Subject: Re: very basic regexp question
>Date: Wed, 26 Sep 2001 22:54:33 -0400 (EDT)
>
>On Sep 27, claement claementson said:
>
> >1. I'm trying to pass a regexp in $bandNameRE through to a while loop,
>but
> >it keeps bailing complaining about an "unrecognised escpape \S", but when
>I
> >put the regexp directly into the condition it's happy. Why is this?
>
>That's because you're using a double-quoted string. Regexes are a
>slightly different form of "string". If you use a string to hold a regex,
>you'll need to use single quotes, or use backslashes in double quotes:
>
> $re = '\w+-\d+';
> # or
> $re = "\\w+-\\d+";
>
>You'd probably want double-quotes since you want to put a variable in the
>regex. But there's another way...
>
> >2. The other thing is that $name could be upper or lower case. I know I
>need
> >to chuck \i into the regexp, which I assumed would be
>(^$bandName\i)(\S)(.*)
> >but quite clearly isn't.
>
>You can add the /i, /m, /s, and /x modifiers to a part of the regex by
>using the (?i) construct:
>
> $re = '(this)((?i)that)'; # matches thisTHaT but not THISTHaT
>
>or the (?i:) construct, which does both grouping (not capturing) and sets
>a modifier at the same time:
>
> $re = '(this)(?i:that)'; # like above
>
>But you want to use qr//. This creates a regex object.
>
> $re = qr/(^$name)(\S)(.*)/i;
>
>Ta da! Looks like a regex in action, kinda. And you can use it like so:
>
> if (/$re/) { ... }
>
>or
>
> if ($str =~ /$re/) { ... }
> # or
> # if ($str =~ $re) { ... }
>
>--
>Jeff "japhy" Pinyan [EMAIL PROTECTED] http://www.pobox.com/~japhy/
>RPI Acacia brother #734 http://www.perlmonks.org/ http://www.cpan.org/
>** Look for "Regular Expressions in Perl" published by Manning, in 2002 **
>
>
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp
--
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
