Ben schrieb: > dear haskellers -- > > i'm trying this question again, in haskell-cafe. i got some responses > in haskell-beginners but am looking for more guidance. also, i > understand this functionality is encapsulated in the Workflow module > in hackage, but i'd like to understand this myself. this email is an > (il)literate haskell file. > > suppose i have class of computations a -> State s b. for > concreteness, let's say i'm writing a library of on-line statistical > summary functions, like
I used functions of such type to describe causal processes. In order make them an arrow, I had to hide the state s using existential quantification. http://code.haskell.org/synthesizer/core/src-4/Synthesizer/Causal/Process.hs _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
