Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
There are several ways to achieve this, for example you can use named captures and the %+ hash:
use strict; use warnings; my $pat1 = qr/(?<pat1>field)/; my $pat2 = qr/(?<pat2>f.i.e.l.d)/; my $pat3 = qr/(?<pat3>the)/; my $str = "There are many soccer fields in England - f1i2e3l4d"; while ( $str =~ m/($pat1|$pat2|$pat3)/ig ) { print "Found '$1' from pattern ", keys %+, "\n"; }
Or you can use perl code embedded in regexes:
my $pat_id; my $pat1 = qr/field(?{$pat_id=1})/; my $pat2 = qr/f.i.e.l.d(?{$pat_id=2})/; my $pat3 = qr/the(?{$pat_id=3})/; my $str = "There are many soccer fields in England - f1i2e3l4d"; while ( $str =~ m/($pat1|$pat2|$pat3)/ig ) { print "Found '$1' from pattern pat", $pat_id, "\n"; }
Or you can use the MARK backtracking control verb and the $REGMARK variable:
my $pat_id; our $REGMARK; my $pat1 = qr/field(*MARK:pat1)/; my $pat2 = qr/f.i.e.l.d(*MARK:pat2)/; my $pat3 = qr/the(*MARK:pat3)/; my $str = "There are many soccer fields in England - f1i2e3l4d"; while ( $str =~ m/($pat1|$pat2|$pat3)/ig ) { print "Found '$1' from pattern ", $REGMARK, "\n"; }
Take a look at perlre these are all documented there. For starting I would recommend you the named captures, probably those are the simplest to handle.

Hope this helps.

update: I've just noticed that I changed the meaning of your original match, because I've used precompiled subpatterns. In that case you would like to include the /i modifier in the subpattern itself: qr/the/i


In reply to Re: Determining which pattern matched by rubasov
in thread Determining which pattern matched by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others avoiding work at the Monastery: (6)
    As of 2014-09-21 17:33 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      How do you remember the number of days in each month?











      Results (173 votes), past polls