Update: Note to self, don't come to PM first thing in the morning. I missed the "must match pair" part of the question. Just change .* to .*? in your regexp and ignore what follows in this post. It's still neat reading, though :)

\|i([^|]*).*\|l([^|]* means match everything from the first |i barcode to the last |l homeloc, inclusively. Try replacing your while with the one below:

$line = '|i1234|lABCD|i5678|i90|lBOO';

while($line =~ /\|i([^|]*)|\|l([^|]*)/g) {
   print("barcode: $1\n") if (defined($1));
   print("homeloc: $2\n") if (defined($2));
}

__END__
output
======
barcode: 1234
homeloc: ABCD
barcode: 5678
barcode: 90
homeloc: BOO

[download]

Here's another nice solution that uses m/\G.../gc

$line = '|i1234|lABCD|i5678|i90|lBOO';

for ($line) {
   /\G \|i     ([^|]*) /gcx && do { print "barcode: $1\n";  redo; };
   /\G \|l     ([^|]*) /gcx && do { print "homeloc: $1\n";  redo; };
   /\G \|[^il]  [^|]*  /gcx && do { redo; }; # skip bad stuff
}

__END__
output
======
barcode: 1234
homeloc: ABCD
barcode: 5678
barcode: 90
homeloc: BOO

[download]

In reply to Re: execute loop code for every occurence of regex by ikegami
in thread execute loop code for every occurence of regex by aquarium

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!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • 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, details, 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, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            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.