Maybe something along the lines of:
c:\@Work\Perl>perl -wMstrict -e
"my @strings = qw(DOG COT BAL MAN);
;;
use constant FMT => '%6s';
;;
printf FMT, $_ for '', @strings;
print qq{\n};
;;
for my $row (@strings) {
printf FMT, $row;
for my $col (@strings) {
my $d = diff($row, $col);
printf FMT, $d;
}
print qq{\n};
}
;;
sub diff { return scalar ($_[0] ^ $_[1]) =~ tr/\0//c; }
"
DOG COT BAL MAN
DOG 0 2 3 3
COT 2 0 3 3
BAL 3 3 0 2
MAN 3 3 2 0
Update: In the
sub diff { return scalar ($_[0] ^ $_[1]) =~ tr/\0//c; }
function definition, the scalar call is not needed, but does no harm. (Assignment to a scalar imposes scalar context.)
Give a man a fish: <%-{-{-{-<