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Re^3: Insert colons into a MAC addressby mantager (Sexton) |
on Jan 14, 2012 at 22:44 UTC ( [id://947917]=note: print w/replies, xml ) | Need Help?? |
Well, I think I'll choose this:
$mac =~ s/([0-9a-fA-F]{2})\B/$1:/g; which can be also spelled as: $mac =~ s/(\p{Hex}{2})\B/$1:/g; The [:xdigit:] class does not work (I don't know why). @Not_a_Number: probably there isn't a reason to prefer a regex over 'unpack' or the use of a module, in this case, since this regex is not really more readable than other methods. Anyway I'm more familiar with regexes than with unpack or the Net::MAC module, so there is a chanche that I will recognize and understand that sooner when looking again at my code in the future. As for modules, I often avoid (or completely overlook) them, because I usually have little or no control on the systems I work onto (so installing a module can be a tricky or impossible task). I see that "use a module" vs "reinvent the wheel" is an ever discussed problem. I'm on the "reinvent the wheel" side, but it's not my fault :) Thanks to all, bye. Edit: jut in case someone come here in the future. [:xdigit:] actually works: $mac =~ s/([[:xdigit:]]{2})\B/$1:/g; I just didn't put enough square brackets. [:xdigit:] is equivalent to [:xdigt] (literally), while [[:xdigit:]] is equivalent to [0-9a-fA-F]. Reading the f. manual helps as usual :)
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