Re: Insert colons into a MAC address

Using look-ahead not to insert final colon:

$mac =~ s/(..)(?=.)/$1:/g
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Comment on Re: Insert colons into a MAC address Download Code

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Re^2: Insert colons into a MAC address by kennethk (Abbot) on Jan 13, 2012 at 16:05 UTC
Rather than performing the unnecessary capture and replace, you can use `\K` on perl 5.10.0 and later to just keep the initial match. `s/..\K(?=.)/:/g` See Character Classes and other Special Escapes in perlre.	[reply] [d/l] [select]