Albeit the Schwarzian transform is a clever solution, user-programmers can suffer from the rule that ready-made solutions are apt to break at the slightest deviation from the requirement they originally met. I am not saying this is a particularly flagrant case, but as a rule, instead of hacking away at a not-quite-fitting algorithm, it might be an idea to try to construct the solution more directly from the actual requirement, e.g.:
my %count;
my @ulist = sort { ($count{ $b } ||= TabCount( $b ) )
                 <=>
                   ($count{ $a } ||= TabCount( $a ) )
                 } values %unk;
sub TabCount {
    $_ = shift;
    s/\s+$//;
    my @split = split /\t/;
    return $#split;
}

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-M

Free your mind

In reply to Re: Bogus variable to avoid 'split' warning by Moron
in thread Bogus variable to avoid 'split' warning by throop

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