Learn to use B::Deparse 
C:\>echo test | perl -ple 42
test

C:\>echo test | perl -MO=Deparse -ple 42
BEGIN { $/ = "\n"; $\ = "\n"; }
LINE: while (defined($_ = <ARGV>)) {
    chomp $_;
    '???';
}
continue {
    print $_;
}
-e syntax OK

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In reply to Re: expression which does nothing by Anonymous Monk
in thread expression which does nothing by jesuashok

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