Help for this page
my @chars = ( 0..9,'a'..'z','A'..'Z' ); print @chars; __DATA__ 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
my $string = join '',0..9,'a'..'z'; $string =~ s/([a-z])/$1\u$1/g; print $string; __DATA__ 0123456789aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ