Hi ,

The not in can be implemented by this I guess 


              my $a = "SCALAR";
              my $str = "TT";
              my $regexs = qr/[^\Q$str\E]/i; 
              $a =~ s/$regexs/HOO /g; 
              print "[$a]\n";

__END__

[HOOHOOHOOHOOHOOHOO]

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In reply to Re: reversing a compiled regex? by OM_Zen
in thread reversing a compiled regex? by dash2

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