[Haskell-cafe] A mistake in haskellwiki

Don Stewart dons at galois.com
Wed Aug 5 23:43:06 EDT 2009


leaveye.guo:
> Hi haskellers:
> 
> There is a mistake in http://www.haskell.org/haskellwiki/State_Monad
> 
> It post two functions like this :
> 
>   evalState :: State s a -> s -> a
>   evalState act = fst $ runState act
> 
>   execState :: State s a -> s -> s
>   execState act = snd $ runState act
> 
> Both the '$' operators should be '.'.
> 
> Anyone would correct it ?


Well, it's a wiki ... :-)

-- Don


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