Personally, I prefer your second approach over the regex approach. I would make it a little more brief with sprintf, something like this:

my $mac_pad =
    join(':' => map { sprintf "%02s", $_ } split(/:/, $mac));

[download]
You could argue that it's too compact, but I think the join-map-split idiom is fairly common. YMMV.

Do not rebuke them with harsh words ... but rather lead them gently - with URLs - so that they may learn wisdom.

In reply to Re: Regex overlap in MAC address by VSarkiss
in thread Regex overlap in MAC address by superfrink

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