I am trying to convert a ethernet addresses from the form 8:0:20:0:2:10 to 080020000210. I need to add a zero to the single digit hex numbers and strip out the colons from the address.

I could split the address using split and then recombine it without the colons, but using regular expressions sounds like more fun.

Here what works:

my $foo = "0:0A:0C:B:B8:F";
$foo =~ s/\A([0-9A-F]){1}:/0$&/g;  #take care of the start
$foo =~ s/:([0-9A-F]{1}):/:0$1:/g; #take care of the middle
$foo =~ s/:([0-9A-F]{1})\Z/:0$1/g; #take care of the end
$foo =~ s/\://g;                   #remove the colon

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I got it working using four different expressions, but I think it is sorta a kludgy solution. Any ideas on how I could improve it?

In reply to Converting MAC Address by HiFoo

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