Just for fun, I wanted to try this with the regexp engine...
#!/usr/bin/perl
use strict;
use warnings;
my @data = qw ( 01 b2 01 00 b6 81 81 01 b4 0a 01 01 01 01 00
01 00 00 01 00 c7 82 82 01 b2 01 00 b8 );
$_ = join(' ', @data);
while ( /(8[[:xdigit:]])\s+\1/g ) {
print "Duplicate $1 found at character " . pos() . "\n";
}
Produces...
bash$ superdoc.pl
Duplicate 81 found at character 20
Duplicate 82 found at character 68
Using...
# while ( /([[:xdigit:]]{2})\s+\1/g ) {
instead, will match any repeated hex digit...
bash$ superdoc.pl
Duplicate 81 found at position 20
Duplicate 01 found at position 35
Duplicate 01 found at position 41
Duplicate 00 found at position 53
Duplicate 82 found at position 68
Cheers!
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