use strict;
use warnings;

my @array = qw(1 4 6 7 23 45 12 1 2);
while (not isSorted(@array))
{
  print +(join ", ", @array) . "\r";
  my ($x, $y) = (rand(scalar @array), rand(scalar @array));
  ($array[$x], $array[$y]) = ($array[$y], $array[$x]);
}
print "\nSort complete!\n";
print join ", ", @array;

sub isSorted
{
  my $x = shift;
  while (my $y = shift)
  {
    return 0 unless ($x cmp $y) < 1;
        $x = $y;
  }
  return 1;
}

##</code><code>##

1, 7, 12, 2, 23, 4, 45, 6, 1
Sort complete!
1, 1, 12, 2, 23, 4, 45, 6, 7