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The bummer with what you have there, besides being long, is that it matches stuff if you've got the colons and the dashes intermingled in the same string, which is probably NOT what you want. Try this chunk of code out:
#!/usr/bin/perl -w use strict; my $d = "[0-9A-Fa-f]"; my $dd = "$d$d"; while (<DATA>) { /($dd([:-])$dd(\2$dd){4})/o && print $1, "\n" } __END__ My MAC address is 00-00-00-00-00-00 over there, and it's 00:00:00:00:00:00 over here, and the date/time happens to be 2001-05-25-15:27. Note that 00:00-00:00-00:00 isn't really valid. Oh, and I have one address of DE:AD:BE:EF:21:12.
When I run it, I get the following output
00-00-00-00-00-00 00:00:00:00:00:00 DE:AD:BE:EF:21:12
Note that it skipped the 4th sample line where the dashes 'n' colons are intermingled.


%_=split/;/,".;;n;u;e;ot;t;her;c; ".   #   Andy Lester
'Perl ;@; a;a;j;m;er;y;t;p;n;d;s;o;'.  #
"hack";print map delete$_{$_},split//,q<   >

In reply to Re: Regular Expression for MAC Address by petdance
in thread Regular Expression for MAC Address by marius

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