I've tried directly with $key++
The problem with Perl's string-increment is that the string has to
match the pattern /^[a-zA-Z]*[0-9]*\z/ for it to work...(see perlop).
So you'd have to increment the corresponding numeric value, e.g.
$key = "\x4f\xcb";
for (1..10) {
$key = pack('n',unpack('n',$key)+1); # ++
print unpack("H*", $key), "\n";
}
__END__
4fcc
4fcd
4fce
4fcf
4fd0
4fd1
4fd2
4fd3
4fd4
4fd5
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