Krzesimir Nowak <> writes:

> On Wed, 2013-12-04 at 17:07 +0100, Jakub Narębski wrote:
>> The only change that needs to be doe is replacing
>>            return $input;
>> with
>>            return 1;
> I prefer to use zeros instead of undefs - one might wonder if that undef
> is somewhat special that we can't use 0.

For Perl speakers, I suspect the code gives a totally opposite
impression.  Normal "false" return from a sub, when there is no
special need, is to return an undef from it, and a "return 0" would
make the readers wonder if there is something special about the way
the returned value has to be numeric zero, no?
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