list of results monad

[G Murali]

hi,

I'm trying to build a monad that will give a list of results.
this is what i want to be able to do

I have

data M a = I [a]

instance Monad M where

return x = I [x]
I (x:xs) >>= f = ??

The type of >>= is m a -> (a -> m b) -> m b
but here the input is [a], now if I apply the input individually on f then i 
can get a [m b] and if i extract at each step then I can get [b] and then if 
i say return ([b]) i get m b.. right ??

Is this how I go about it .. if so can you give me a small code snippet of 
how to do that.


Thanks,
gmu
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