Solved

Pattern Matching

Posted on 1998-12-28
5
134 Views
Last Modified: 2010-03-05
How do I match a string for multiple characters?

$string = "sgds*G$GJ#G()g";

I want to search $string for any instances of * OR # OR $.

What's the easiest (best) way to do this?

Thanks-
Matt
0
Comment
Question by:tribal9
[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
5 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 1207184
Do you mean
$string = 'sgds*G$GJ#G()g';
or did you define $GJ
What do you want to do with any instances of * OR # OR $
To check if $string contains any of them, you might say:
print '$string contains instances of * OR # OR $' if $string =~ /[*#\$]/;
or perhaps:
$string =~ m'[*#$]'
0
 
LVL 4

Expert Comment

by:martinag
ID: 1207185
Is this what you want?

if ($string =~ /[\*\$#]/) {
  print "Found one!";
}
else {
  print "Sorry!";
}

Martin
0
 

Accepted Solution

by:
comvosora earned 20 total points
ID: 1207186
Well, you can do a

@a = $string =~ /.*([#*$])+.*/gsi;

and get each occurence in one item of array @a (if you would like to count them, for instance)
0
 

Author Comment

by:tribal9
ID: 1207187
Ah, yes, Martin and Ozo, that was what I wanted.

The $G in the string was a typo (meant just the '$' char, not variable), and I am using it to block out unacceptable names from a form submission.

0
 
LVL 84

Expert Comment

by:ozo
ID: 1207188
martinag's solution works, (although it's not neccessary to backwhack the * inside of a [] character class)
But the Accepted Answer does not work.
(and even with a \ in front of the $, the .* would mean it only gets the last occurance, contrary to comvosora's comment)
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Perl 101 11 85
Using Perl to parse rows 7 101
Perl DBI Transactions Using Custom Module 7 48
Executing multiple sybase statements in perl dbi 2 99
A year or so back I was asked to have a play with MongoDB; within half an hour I had downloaded (http://www.mongodb.org/downloads),  installed and started the daemon, and had a console window open. After an hour or two of playing at the command …
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…

761 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