Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions

conditional regex

Posted on 2002-03-13
Last Modified: 2010-03-05
I'm working on a simple templating system, don't want to use the perlmod for it, but I'm having trouble with this regex...

I want to take tags of the form
and put them as

this is the basic version:

$url = "view.cgi?page=";
$content =~ s/\[\[(.*?)\]\]/$url$1/g;

but I'd like to do relative links as well, so that


would become

(assume the current dir is in $currentdir )

in short, I want to say "if $1 doesn't contain a / then prepend it with currentdir/" in my original substitution but I don't know how...
Question by:kisrael
  • 4
  • 3
  • 2
  • +4
LVL 84

Expert Comment

ID: 6863012
$content =~ s#\[\[(.*?)\]\]#$url.($1!~tr"/""&&"$currentdir/").$1#eg;

Accepted Solution

bebonham earned 200 total points
ID: 6863110
#relative path
my $currentdir="home/";

my $test="[[dir/page]] [[page2]] asdlkj asdsa/adsa [[super]] [[mak/fu]]";
$url = "view.cgi?page=";
$content =~ s/\[\[([^\]]*\/[^\]]*)\]\]/$url$1/g;
$content =~ s/\[\[([^\/]*)\]\]/$url$currentdir$1/g;

print content;                                                              

if you explain how the data in content looks, I could make it more efficient.


Expert Comment

ID: 6863214
sub substitute {
    my $tmpl = shift;
    $url . ($tmpl =~ /\// ? '' : "$currentdir/") . $tmpl;

$content =~ s/\[\[(.*?)\]\]/substitute($1)/eg;
Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

LVL 16

Expert Comment

ID: 6863292

Welcome back!!!

You have the following 2 questions open for a long time now. Please take some time to close these questions asap.

EE userid kisrael
Total questions asked 47 (100%)
Open questions 2

Topic Area              URL              Date              
Java Programming   http://www.experts-exchange.com/jsp/qShow.jsp?ta=java&qid=11751658   11/03/00  
JavaScript   http://www.experts-exchange.com/jsp/qShow.jsp?ta=javascript&qid=11880058   11/15/00  

Your help in closing these questions will be highly appreciated.


(NOT a moderator at EE)

Expert Comment

ID: 6863371
maneshr, if you are an expert here it seems like a bit of a conflict of interest to moderate it as well. The idea of a moderator is that by not being a participant, they can impartially mediate a competition. Have you thought about asking EE to let you moderate in some other area?

kisrael, not sure of your exact application, but there are plenty of good templating modules at CPAN, like HTML::Template
LVL 16

Expert Comment

ID: 6863632

".., if you are an expert here it seems like a bit of a conflict of interest to moderate it as well. ..."

Since i have clearly indicator that i am NOT a moderator, your point is moot.

Thanks for your comments.

Expert Comment

ID: 6864147
I agree with leighzions, you start shouting at users for leaving two questions open. If you're clearly indicated NOT a moderator, then don't moderate.

Mr B

Expert Comment

ID: 6864697
maneshr is trying to help,

maybe kisrael didn't know he had these questions open.

if the moderators had a problem with maneshr, they'd say.

since you two are not moderators, follow your own advice.

Author Comment

ID: 6864839
Ozo and Bebonham both offered good solutions to the problem...Ozo's is more educational in someways and I only barely understand what it's about. (But it was a very direct response to how I asked the question.) Bebonham's is more rough and ready and what I should come up with myself. In the interest of people understanding my code in the future, I'm going to go with Bebonham's suggestion, so I guess Bebonham should get the points.

Thanks to you both.

And I went back, accepted an answer for a previous question, and closed the other one.  I personally didn't mind the reminder to do so, though I did get the impression that I was being asked to do so by some official representative, not by a community representative (it was because of the politeness and formality of the presentation, I didn't take the time to read the last line.)
LVL 16

Expert Comment

ID: 6865244

"..And I went back, accepted an answer for a previous question, and closed the other one.  ...":

Your help in closing these questions is highly appreciated.


(NOT a moderator at EE).

Expert Comment

ID: 6866273
maneshr, my point is not moot, you haven't addressed any of the concerns. The moderators here do a very good job. If you want to officially become one, you only need to apply. Or report bad users in the community support area.  Otherwise, there is always a question in people's mind about what rights you have to try to manage them. Your intentions are good, no one likes to see there answers ignored. I am only suggesting there are more effective ways to achieve this.

LVL 16

Expert Comment

ID: 6866629

We can go on-and-on with this discussion & still get nowhere.

Therefore, in the interest of both of our times, please post a question highlighting your concerns in the "Community Support" (http://www.experts-exchange.com/jsp/qList.jsp?ta=commspt) topic area.

A moderator of EE will answer your question, hopefully to your satisfaction.


Expert Comment

ID: 6866857
It doesn't really bother me that much, so I wont take it to community support. I was only trying to clarify what your role/status is here. I still don't think it is very clear so others may query it in the future. But if you are not open to ideas or suggestions, there is not much I can do about it.

Featured Post

Free Tool: Postgres Monitoring System

A PHP and Perl based system to collect and display usage statistics from PostgreSQL databases.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

I have been pestered over the years to produce and distribute regular data extracts, and often the request have explicitly requested the data be emailed as an Excel attachement; specifically Excel, as it appears: CSV files confuse (no Red or Green h…
In the distant past (last year) I hacked together a little toy that would allow a couple of Manager types to query, preview, and extract data from a number of MongoDB instances, to their tool of choice: Excel (http://dilbert.com/strips/comic/2007-08…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…

861 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question