#!/usr/bin/perl
use strict;use warnings;

sub versionsort {
   my ($a,$b) = @_;
   my $diff;
   foreach (0..$#$a) {
      return 1 if !defined $b->[$_];
      $diff = $a->[$_] <=> $b->[$_];
      return $diff if $diff;
      }
   return @$a <=> @$b;
   }

my @data = qw(1.1 11.2.3 2.3 11.2.1 11.2 11.2.1.1);
print "before: ".join(', ',@data)."\n";
my @versions = map { [split '\.',$_] } @data;
my @sorted = map { join '.',@$_}
                 sort {versionsort($a,$b)} @versions;
print "sorted: ".join(', ',@sorted)."\n";
[download]

before: 1.1, 11.2.3, 2.3, 11.2.1, 11.2, 11.2.1.1
sorted: 1.1, 2.3, 11.2, 11.2.1, 11.2.1.1, 11.2.3
[download]