Re^2: Insert colons into a MAC address

Without nasty look-aheadses:

>perl -wMstrict -le
"my $ma = '525400eb8b36';
 $ma =~ s/..\K\B/:/g;
 print qq{'$ma'};
"
'52:54:00:eb:8b:36'
[download]

Comment on Re^2: Insert colons into a MAC address Download Code

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Re^3: Insert colons into a MAC address by GotToBTru (Prior) on Jan 13, 2012 at 21:23 UTC
`>perl -wMstrict -le 'my $ma="525400eb8b36"; $ma =~ s/..\K\B/:/g; > print $ma; ' Unrecognized escape \K passed through at -e line 1. 525400eb8b36 >` [download] Old Perl Version syndrome, I guess.	[reply] [d/l]
Re^4: Insert colons into a MAC address by AnomalousMonk (Archbishop) on Jan 14, 2012 at 08:57 UTC
Old Perl Version ... Indeed. The `\K` special escape was introduced with 5.10. The following works pre-5.10, but we're back to a look-back. Oh, well... `>perl -wMstrict -le "print $]; my $ma = '525400eb8b36'; $ma =~ s{ (?<= \G ..) \B }{:}xmsg; print qq{'$ma'}; " 5.008009 '52:54:00:eb:8b:36'` [download]	[reply] [d/l] [select]