Actually, the string was split according to the separator. But you put the separator into parentheses, which also put the separator into the result list. Maybe it is just the way that you are printing your results that confuses you?

#!perl -w
use strict;
use Data::Dumper;

my @a1 = split /abc/, "uno abc dos";
my @a2 = split /(abc)/, "uno abc dos";

print "a1: ", Dumper \@a1;

print "a2: ", Dumper \@a2;

__END__
a1: $VAR1 = [
          'uno ',
          ' dos'
        ];
a2: $VAR1 = [
          'uno ',
          'abc',
          ' dos'
        ];

[download]

These two variants of results are what you can get using a plain split. Others have already replied with ways you can modify those results to move, for example, the second element of the array into $1, but split does not set or modify the capture variables.

In reply to Re^5: Curios use of regular expressions in split by Corion
in thread Curios use of regular expressions in split by juliosergio

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.