Do MAC addresses always have six sections? If so, you could do something like this:
my $fmt = '%02x' x 6;
$mac = sprintf $fmt, map hex, split /\./, $mac;
It's still two lines, but the first is just there so I don't have to type '%02x' six times :)
Oh, and it's not really a regex solution - sorry!
European Perl Conference - Sept 22/24 2000, ICA, London
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