[Haskell-cafe] Re: Library design question

Andre Nathan andre at digirati.com.br
Sat Sep 20 11:46:48 EDT 2008

On Sat, 2008-09-20 at 14:56 +0200, Daniel Fischer wrote:
> > modify' f = do
> >     s <- get
> >     put $! f s
> Or try Control.Monad.State.Strict.

Control.Monad.State.Strict did it for me, but the strict modify didn't.
I tried using modify' and also

  randomDouble = do
    g <- get
    let (r, g') = random g
    put $! g'
    return r

instead of

  randomDouble = State random

Any hints on how I could find where else the program is being too lazy?


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