[Haskell-cafe] what do you think of haskell ? (yes, it's a bit general ...:)

minh thu noteed at gmail.com
Thu Jun 15 16:14:00 EDT 2006

yes i know about that, but i was talking about randomIO which breaks that view;
and i find that quite weird for a 'clean' language.

* another thing i remember now :
binary io. there are some libraries but it's not really standard. and
it's weird to learn all (well, or just one) that libraries just to do


2006/6/15, Henning Thielemann <lemming at henning-thielemann.de>:
> On Thu, 15 Jun 2006, minh thu wrote:
> > * randomIO
> > side-effect is nicely resolved with monad. and you have to thread your state.
> > if you're writing your monad or use a transformer, things are quite
> > explicitly (even if it's implicit in the do notation) threaded.
> You know that random generators are not bounded to IO? 'random' and
> related functions work just like the random generators in object oriented
> designs. In OO languages the random generator is usually an object which
> hides a state and there can be several instances of random generators. In
> Haskell the random generator can be viewed as a State monad. But you are
> right, you have to carry the monad with you all the time. Alternatively it
> is sometimes simpler to consume values from a list generated by randomRs.

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