simple regular expression question

[SaltyDuke]

hello

i'm having a little trouble getting my regular expression to work properly. Basically, i just want to search thru a line of text to see if it matches the contents of a variable, like so:

if($tring =~ /$compare/)
{
print "whoppee!!";
}

only there are 2 problems:
1. either string may be either lowercase or uppercase.
2. $compare may occur anywhere in $tring.

so i just need 3 pieces of info: an upper/lowercase function, an inexact pattern matching expression (is that m// ???) and if i'm using the if statement above correct.

(as yo can tell, my knowledge of regular expressions/pattern matching is patchy to say the least. nyone know a good tutorial?? )

Thanx in advance
TheSaltyDuke

 

[zephan]

Hi,
if($string =~/$compare/i)
{
print "whoppee!!";
}

i = ignore case.

$compare may occur anywere in $string, this expression will retrun true. That's because you regexp is not anchored.

$string=~/^$compare/i will match only if $string start with $compare.

The link below is to an official perl regular expressions tutorial :

http://www.goss.com/perl/PerlManPdf/perlre.pdf

Regards,
Zephan

 

[duncdude]

Looks like you've got it right - just missing one thing

if($tring =~ /$compare/i)
{
print "whoppee!!";
}

i will tell the regex to ignore case

The above should work with no problem

Duncan

 

[SaltyDuke]

Thanx for your help guys!!!