On Sun, Sep 11, 2005 at 01:48:16AM -0400, Cale Gibbard wrote:
> On 10/09/05, Frederik Eaton <[EMAIL PROTECTED]> wrote:
> > These are good arguments, and I think this is a good direction for the
> > discussion, should it continue.
> >
> > > Despite having a fairly mathematical background, I don't really care
> > > for the proposed syntax.
> > >
> > > myList :: [[Integer]]
> > > myList = return [1,2,3,4]
> >
> > I'm assuming you mean
> >
> > myList :: [[Integer]]
> > myList = [1,2,3,4]
>
> No, the confusion is over whether to lift the return, because the
> inner and outer monads are the same. It's either return [1,2,3,4] ==
> [[1,2,3,4]], or it's liftM return [1,2,3,4] == [[1],[2],[3],[4]]
I think that Frederik's example is even better. Here you either lift the
entire list or each individual number:
return [1,2,3,4]
or
[return 1,return 2,return 3,return 4]
After all, return is only a fancy name for liftM0 ;-)
Best regards
Tomasz
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