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Re^2: Two Different Languages: Two Similar Books

by EvanCarroll (Chaplain)
on Oct 17, 2005 at 02:46 UTC ( #500642=note: print w/replies, xml ) Need Help??


in reply to Re: Two Different Languages: Two Similar Books
in thread Two Different Languages: Two Similar Books (PBP and CCS)

Technical Report 1, a specification for new functionality being added to C++'s standard library due sometime around year 2008. http://aristeia.com/EC3E/TR1_info_frames.html

You speak too soon. Perl6, vs C++/TR1. Now with Hashes!


Evan Carroll
www.EvanCarroll.com
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[Lady_Aleena]: Good morning Corion, I hope you have a wonderful day as well. 8)
[Corion]: Yesterday I encountered an interesting data structure problem. I have a remote program that emits events, and my client listens for these events with one-shot callbacks, that is, I register the callback and if the event gets generated that callback ...
[Lady_Aleena]: robby_dobby, every day. Chaos is my life with few controls.
[Corion]: ... gets called once. The data structure for that is just a hash of arrays, mapping the event type to a queue of registered one-shots, and the first one-shot from the queue gets removed and called.
[Corion]: But now I want to register a one-shot for two events, of which only one will arrive, so my data structure doesn't work anymore...
[Lady_Aleena]: Corion, ouchy.
[Corion]: (maybe I should write this up as a SoPW) - currently, the "most efficient" data structure I come up with is a single array which I scan for the first fitting one-shot. Not efficient but I don't expect more than five outstanding one-shots anyway
[choroba]: can't you create a meta-key corresponding to the disjunction of the events?
[robby_dobby]: Corion: Heh. This whole thing smells of Strategy Pattern or MVC pattern.
[Corion]: And performance linear to the number of registered one-shots doesn't feel that bad. Maybe I should collect statistics on how many callbacks are outstanding ;)

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