[Haskell-cafe] How to implement a digital filter, using Arrows?
dmbarbour at gmail.com
Thu Oct 20 18:30:59 CEST 2011
On Thu, Oct 20, 2011 at 5:19 AM, Captain Freako <capn.freako at gmail.com>wrote:
> Hi David,
> I was referring to the `f' in the `runAuto' function, not the `liftAu'
Ah, I see. You quoted one thing and spoke of another, and I got all
confused. Keep in mind that functions are arrows (instance Arrow (->)).
> type FilterAu b c = Automaton (->) b c
> runAuto :: FilterAu b c -> [b] -> [c]
> runAuto a  = 
> runAuto (Automaton f) (x:xs) = let
> (y,a) = f x
> in y:runAuto a xs
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Haskell-Cafe