Given MAC-48 format, using either colons or hyphens, how about a substitution:
$ perl -le '$re = qr{(\S\S)[-:](\S\S)[-:](\S\S)[-:](\S\S)[-:](\S\S)[-:
+](\S\S)};
$str1 = "28:8a:1c:59:cc:85"; $str2 = "28-8a-1c-59-cc-85";
( $cat1 = $str1 )
=~ s/$re/$1$2.$3$4.$5$6/;
( $cat2 = $str2 )
=~ s/$re/$1$2.$3$4.$5$6/;
print "$str1 is now $cat1\n";
print "$str2 is now $cat2\n";
'
__output__
28:8a:1c:59:cc:85 is now 288a.1c59.cc85
28-8a-1c-59-cc-85 is now 288a.1c59.cc85
Too ugly??
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