Solved

Pattern Matching

Posted on 1998-12-28
5
132 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
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

Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

Question has a verified solution.

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

Suggested Solutions

Many time we need to work with multiple files all together. If its windows system then we can use some GUI based editor to accomplish our task. But what if you are on putty or have only CLI(Command Line Interface) as an option to  edit your files. I…
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…
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…
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…

810 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