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Postings from November 2010
Am 17.11.2010 10:31, schrieb Kris Shannon: > A recent rakudo commit [1] is a quick fix for #78896 [2] to allow > exponentiation of Duration's. And it did so with a real world use case in mind. > I'm uneasy with allowing this and I think the spec probably meant not > to but is badly worded [3]: > > Durations allow additive operations with other durations, and allow > any numeric operation with a number as the other argument: > > $duration * $duration # WRONG, durations aren't geometric > $duration * 2 # ok, a duration twice as long > 2 * $duration # same > > What are your thoughts? I've summarized my thoughts here, before I read your email: http://perlgeek.de/blog-en/perl-6/real-world-strikes-back.html Another example: current Duration % Duration is forbidden. But I have a very good use case: suppose I want to organize a 60 minutes session, and it's filled with presentations, each 8 minutes long. How long do I have for the introduction, if I fit in as many presentations as possible? The operation $session_duration % $presentation_duration answers me that. Why am I not allowed to carry out that operation? Because some designer thought I'd be better off not doing that operation. Wow, awesome reason</sarcasm>. > [1] https://github.com/rakudo/rakudo/commit/d9e22463479927fa8f1f594753979022de35970d > [2] http://rt.perl.org/rt3/Ticket/Display.html?id=78896 > [3] https://github.com/perl6/specs/commit/32abb95b9776e1cb7672c8a6a77612c86b37aea2#L0R1333Thread Previous | Thread Next