perl -Mstrict -Mwarnings -e 'package blub; sub new { bless {} } sub bar {my $self=shift; $self->{bla}="5065726c2d436f6d6d756e697479"; return $self->{bla};} my $foo=blub->new();print "Hallo ";print pack("H*",$foo->bar()); print "\n"'

http://perl-tutor.de

perl -le "s::*erlco'unaty.'.dk':e,y;*kn:ai;penmic;;print"
http://www.fabiani.net/