If you're afraid of Yampa (I was ;p), Ertugrul Söylemez released recently the Netwire <http://hackage.haskell.org/package/netwire-3.1.0> library on hackage. I went through its internals and I find it simpler to grasp and to use than Yampa as Ertugrul chose to replace the switch functions by the use of ArrowChoice. Yet I don't know if the latter wholly supersedes the former. Plus I like the fact it doesn't depend on IO (you can handle automatons in pure code).
And if you're to stick with Yampa, you might wanna look at Animas.<http://hackage.haskell.org/package/Animas-0.2> It's a fork of Yampa. I don't the advantages it brings or what I changes, but its documentation on hackage is far more complete. 2011/12/27 Tim Baumgartner <baumgartner....@googlemail.com> > Hi Haskellers! > > I'm writing my first non-trivial Haskell application. I have an electronic > drum set that generates MIDI events that I process with Haskell. A simple > application of this kind might have fixed drums associated with fixed > commands (I've done that). The next step would be to display menus (with > very large font...) that show commands and the associated drums. The menu > structure should be derived from the commands active in each context. Up to > this point, I implemented this already in Java. But now after some > successful attempts in Haskell, I plan for more features: the user should > ultimately be able to record his own "triggers", i.e. short drum rhythms, > and associate them with actions. Since I'm still a beginner with only some > basic experience in Monads, Arrows and their transformers, there is > infinite knowledge to be gained by working on this problem (both library > and concrete apps). > > Currently I'm using a monad that combines Parsec (with MIDI event stream) > and a Writer (that writes commands that should result in IO). It's done in > a way that during running the monad, many parses can be done and failing > parses roll back the parser state so that a new parse can be tried. > > Now my questions: > I have read about Yampa, but I have not mastered it yet. E.g. I don't > understand switches. Could my "triggers" be realized with Yampa's events > and switches? > Would you recommend any other approach? > Is there something similar somewhere? > > Regards > Tim > > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > >
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
