[Haskell-beginners] How to solve this using State Monad?

[Ertugrul Söylemez]

Miguel Negrao <miguel.negrao-lists at friendlyvirus.org> wrote:

> Because of those posts I spent my morning reading about arrows which
> seems a quite interesting concept, although couldn’t yet see what is
> best for ( I would be curious to learn it in order to try out Yampa).
> I have to say that the resources I found to learn about arrows on the
> net were a bit disorganized. This page is really well done
> http://en.wikibooks.org/wiki/Haskell/Understanding_arrows but then
> because I don’t know much about parsers I couldn’t really progress
> through the second half.

I have started an arrow tutorial which many people found easy to follow.
It's not finished yet, but since so many people found it useful I'm
sharing that unfinished tutorial:

    <http://ertes.de/new/tutorials/arrows.html>

It answers the most important questions:  What?  Why?  How?  To some
extent it also answers:  When?  But I have to work on that question.
The basics of the automaton arrow are covered, but when I find time I
will extend the tutorial to cover Auto in full.  Finally I also intend
to cover a powerful generalization of Auto:  the wire arrow, which is
the basis of the Netwire AFRP library.


Greets,
Ertugrul

-- 
nightmare = unsafePerformIO (getWrongWife >>= sex)
http://ertes.de/
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