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Incrementing i

Name: Anonymous 2009-03-16 8:40

i++; versus i+=1; versus i=i+1;

Discuss.

Name: Anonymous 2009-03-16 14:34

I use state monad for that;

newtype State s a = State { runState :: (s -> (a,s)) } 

 

instance Monad (State s) where 

    return a        = State $ \s -> (a,s)

    (State x) >>= f = State $ \s -> let (v,s') = x s in runState (f v) s'

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