Duals or ranges and reactive D
C#'s IObservable<>/IObserver<> made me think how would a dual [1][2] of a range concept look in D. Since D has no equivalent IEnumerable<> (as it is no needed thanks to templates) it is only about IEnumerator<> / IObserver<> part which relates to a D range. Ranges/enumerators are models of 'pull' style interface whereas their duals represent models of 'push' style enabling reactive programming [3] techniques which are really nicely solving issues of asynchronous / event - based programming. I suppose OutptRange is similar in concept, although it has 'OnCompleted' / 'OnError' missing. What do you think? Rx along with LINQ is a really clean solution to the problem of asynchronous ranges of values. I think it would be very nice to have in D too. [1] http://csl.stanford.edu/~christos/pldi2010.fit/meijer.duality.pdf [2] http://josemigueltorres.net/index.php/ienumerableiobservable-duality/ [3] https://channel9.msdn.com/Shows/Going+Deep/Expert-to-Expert-Brian-Beckman-and-Erik-Meijer-Inside-the-NET-Reactive-Framework-Rx
Re: Duals or ranges and reactive D
On Thursday, 27 February 2014 at 12:41:14 UTC, Szymon Gatner wrote: C#'s IObservable<>/IObserver<> made me think how would a dual Topic should of course be: "Duals OF ranges and reactive D"
Re: Duals or ranges and reactive D
On 02/27/2014 01:41 PM, Szymon Gatner wrote: C#'s IObservable<>/IObserver<> made me think how would a dual [1][2] of a range concept look in D. Since D has no equivalent IEnumerable<> (as it is no needed thanks to templates) it is only about IEnumerator<> / IObserver<> part which relates to a D range. Ranges/enumerators are models of 'pull' style interface whereas their duals represent models of 'push' style enabling reactive programming [3] techniques which are really nicely solving issues of asynchronous / event - based programming. I suppose OutptRange is similar in concept, although it has 'OnCompleted' / 'OnError' missing. What do you think? Rx along with LINQ is a really clean solution to the problem of asynchronous ranges of values. I think it would be very nice to have in D too. [1] http://csl.stanford.edu/~christos/pldi2010.fit/meijer.duality.pdf [2] http://josemigueltorres.net/index.php/ienumerableiobservable-duality/ [3] https://channel9.msdn.com/Shows/Going+Deep/Expert-to-Expert-Brian-Beckman-and-Erik-Meijer-Inside-the-NET-Reactive-Framework-Rx In case you are interested, I have thrown together a small proof of concept implementation: http://dpaste.dzfl.pl/9d8386768da0
Re: Duals or ranges and reactive D
On Saturday, 8 March 2014 at 12:01:10 UTC, Timon Gehr wrote: On 02/27/2014 01:41 PM, Szymon Gatner wrote: C#'s IObservable<>/IObserver<> made me think how would a dual [1][2] of a range concept look in D. Since D has no equivalent IEnumerable<> (as it is no needed thanks to templates) it is only about IEnumerator<> / IObserver<> part which relates to a D range. Ranges/enumerators are models of 'pull' style interface whereas their duals represent models of 'push' style enabling reactive programming [3] techniques which are really nicely solving issues of asynchronous / event - based programming. I suppose OutptRange is similar in concept, although it has 'OnCompleted' / 'OnError' missing. What do you think? Rx along with LINQ is a really clean solution to the problem of asynchronous ranges of values. I think it would be very nice to have in D too. [1] http://csl.stanford.edu/~christos/pldi2010.fit/meijer.duality.pdf [2] http://josemigueltorres.net/index.php/ienumerableiobservable-duality/ [3] https://channel9.msdn.com/Shows/Going+Deep/Expert-to-Expert-Brian-Beckman-and-Erik-Meijer-Inside-the-NET-Reactive-Framework-Rx In case you are interested, I have thrown together a small proof of concept implementation: http://dpaste.dzfl.pl/9d8386768da0 Wow, that is now what I'd small ;) I will definitely take a look. Is it something you already had written or something new? How do you feel about the concept?
Re: Duals or ranges and reactive D
On 03/10/2014 08:26 PM, Szymon Gatner wrote: In case you are interested, I have thrown together a small proof of concept implementation: http://dpaste.dzfl.pl/9d8386768da0 Wow, that is now what I'd small ;) I will definitely take a look. Is it something you already had written or something new? I've written it in response to you post. (Note that it works with DMD 2.064.) How do you feel about the concept? It does not make a lot of sense with value semantics, so efficiency might be a concern. I don't know how useful this specific implementation (that deviates from std.range only slightly) would be in practice (e.g. probably one wants to be able to reserve space even if writing is not random access.)
Re: Duals or ranges and reactive D
Reactive programming is related to dataflow, so you will run into problems when you get beyond toy-size programs. Though, with compiler support… http://cs.brown.edu/~sk/Publications/Papers/Published/bck-lowering-opt-trans-frp/paper.pdf
Re: Duals or ranges and reactive D
On Thursday, 8 May 2014 at 19:52:01 UTC, Ola Fosheim Grøstad wrote: Reactive programming is related to dataflow, so you will run into problems when you get beyond toy-size programs. Though, with compiler support… http://cs.brown.edu/~sk/Publications/Papers/Published/bck-lowering-opt-trans-frp/paper.pdf Any update on introducing Observable push concepts into D?
