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I think that you'll have a hard time finding that documented. ;-) (Though I have a pretty good idea why it works.)

I also wouldn't want to trust it across Perl versions. That seems very specific to perl5, and I would not plan on that specific optimization finding its way into Ponie for instance.


In reply to Re: Re: Deleting undef values from a hash by tilly
in thread Deleting undef values from a hash by liz

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