I would  very much appreciate if you can expand on this:

Haskell's laziness doesn't help -- in fact, to avoid running out of
>
memory, we'd have to defeat that memoization by sprinkling "() ->"
>
throughout the types.
>

Would it be possible to explain this with an example?

Thanks

Daryoush

On Wed, Feb 23, 2011 at 7:52 AM, Chung-chieh Shan <ccs...@cs.rutgers.edu>wrote:

> Hello!  Thank you for your interest.
>
> Daryoush Mehrtash <dmehrt...@gmail.com> wrote in haskell-cafe:
> > Is the "Embedded domain-specific language HANSEI for probabilistic models
> > and (nested) inference"  described in:
> > http://okmij.org/ftp/kakuritu/index.html#implementation  available in
> > Haskell?
>
> The closest to that I know of is this one:
>  http://d.hatena.ne.jp/rst76/20100706
>  https://github.com/rst76/probability
>
> Or you can apply this monad transformer to a probability monad:
>  http://sebfisch.github.com/explicit-sharing/
>
> > Is there a reason why the author did the package in Ocaml
> > rather than Haskell?
>
> Mostly we preferred (as do the domain experts we target) to write
> probabilistic models in direct style rather than monadic style.
> Haskell's laziness doesn't help -- in fact, to avoid running out of
> memory, we'd have to defeat that memoization by sprinkling "() ->"
> throughout the types.
>
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