Or you could let Number::Range do it for you: 
use strict;
use warnings;

use Test::More;
use Number::Range;

sub get_numbers_from_ranges {
  my @ranges = split ',', shift;
  my @numbers = ();
  for my $range (@ranges) {
    my ($start, $end) = split '-', $range;
    push @numbers, ($end)
      ? Number::Range->new("$start..$end")->range()
      : $start;
  }
  return \@numbers;
}

plan tests => 2;

is_deeply(
  get_numbers_from_ranges("2-8,10-13,18"),
  [ 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 18 ]
);
is_deeply(
  get_numbers_from_ranges("6-9,1-3,11"), 
  [ 6, 7, 8, 9, 1, 2, 3, 11 ]);

__END__

[download]
$ prove  713553.pl
713553....ok
All tests successful.
Files=1, Tests=2,  0 wallclock secs ( 0.04 cusr +  0.01 csys =  0.05 C
+PU)

[download]
--
No matter how great and destructive your problems may seem now, remember, you've probably only seen the tip of them. [1]

In reply to Re: Extracting Ranges from Sequences using hashes by andreas1234567
in thread Extracting Ranges from Sequences using hashes by harishnuti

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.