[reactive] Feedback on my first Reactive program: Monad Laws

[Freddie Manners]

0.10.5, 6.10.1 btw.

2009/3/29 Freddie Manners <f.manners at gmail.com>

> Digging around with the commented query -- that a "pure (string)" is
> getting delayed -- I've hit a rather fundamental problem: it seems Event
> doesn't obey the Monad laws.  I don't know whether this is a known issue or
> whether I'm being plain stupid, but this:--
>
> module Main
>     where
>
> import FRP.Reactive
> import FRP.Reactive.LegacyAdapters
> import Control.Concurrent
> import Control.Applicative
> import Control.Monad
> import Data.Monoid
> import Data.Maybe
>
> main = do
>         clock        <- makeClock
>         (sink, evnt) <- makeEvent clock
>         forkIO . sequence_ $ repeat (getLine >>= sink)
>         adaptE . fmap putStrLn $ (pure "A Line!" `mappend` evnt)
> --     adaptE . fmap putStrLn $ (pure "A Line!" `mappend` (evnt >>=
> return))
>
> and the same with the penultimate line commented instead of the last,
> appear to have different behaviours: in the version shown, "A Line!" is
> printed when the program starts; and in the other, this is delayed until
> after the first line is read (but before it is printed).
>
> Should this happen?
>
> Freddie Manners
>
> 2009/3/29 Mads Lindstrøm <mads_lindstroem at yahoo.dk>
>
>> Hi
>>
>> As part of studying the Reactive library, I have created a simple game.
>> The object of the game is to guess a number.
>>
>> As I am a newbie with respect to FRP, I assume that my game could have
>> been implemented more elegantly. Comments are most welcome.
>>
>> The game can be found here
>> http://hpaste.org/fastcgi/hpaste.fcgi/view?id=3037#a3037 and it is
>> attached.
>>
>>
>> Greetings,
>>
>> Mads Lindstrøm
>>
>>
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>>
>>
>
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