?
Solved

regex

Posted on 1998-10-03
3
Medium Priority
?
173 Views
Last Modified: 2010-03-05
The below two snippets of code should do the SAME thing, however the first works and the later one doesn't. What is wrong with my regex in the second?

--- This WORKS: ----------------------------
 if (($a =~ /\//) && ($b =~ /\//)) {
   ($tempA,$junk) = split(/\//,$a);
   ($tempB,$junk) = split(/\//,$b);
   print "($tempA : $tempB)\n";
 }
--------------------------------------------

---  This DOESN'T: -------------------------
 if (($a =~ /(.*)\//) && ($b =~ /(.*)\//)) {
   print "($1 : $2)\n";
 }
--------------------------------------------
0
Comment
Question by:rw263
[X]
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
  • 2
3 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 1205128
Nothing sets $2, and the $1 from ($a =~ /(.*)\//) is overwritten by ($b =~ /(.*)\//))
You might try something like
print "($tempA : $tempB)\n" if (($tempA)=($a =~ /(.*)\//)) && (($tempB)=($b =~ /(.*)\//));
0
 

Accepted Solution

by:
ItamarC earned 20 total points
ID: 1205129
The comment from 'ozo' was right. If you want to use $1 and $2, you need to have all this in one matching expression.
The code below will do what you need. I used "x_x" to separate $a and $b. You can change it to what you like.

if ( "${a}x_x$b" =~ /(.*)\/.*x_x(.*)\// ) {
  print "($1 : $2)\n";
}

0
 
LVL 84

Expert Comment

by:ozo
ID: 1205130

0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

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

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…
Checking the Alert Log in AWS RDS Oracle can be a pain through their user interface.  I made a script to download the Alert Log, look for errors, and email me the trace files.  In this article I'll describe what I did and share my script.
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…
Six Sigma Control Plans
Suggested Courses

765 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