[Haskell-cafe] better way to do this?

[Michael Mossey]

If I understand correctly, this works because IO is an instance of 
Applicative, correct?

I wonder if any of the random monads are instances of Applicative.

Felipe Lessa wrote:
> On Sun, Oct 04, 2009 at 01:55:11PM +0400, Eugene Kirpichov wrote:
>> [x,y,t,b,l,r] <- mapM (getStdRandom . randomR) [(-10,10), (-70,70), ...]
>> return (BoxBounds ...)
> 
> import Control.Applicative
> 
> let f = getStdRandom . randomR
>     g1 = \x -> f (-x,x)
>     g2 = f (5,10)
> in BoxBounds <$> g1 10 <*> g1 70 <*> g2 <*> g2 <*> g2 <*> g2
> 
> --
> Felipe.
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