[reactive] Simple Example ..

[Tom Poliquin]

Tom Poliquin wrote:
> I've been struggling trying to get a simple Reactive example
> running ..
>
> I'm a newbie to FRP and few months of Haskell (Scheme before that).
>
> David Sankel previously posted a simple example which I loaded
> up with great joy .. but I get the error ..
>
> ConsoleAdapter.hs:24:50:
>     Couldn't match expected type `Event Char'
>            against inferred type `FRP.Reactive.Internal.Misc.Sink a'
>     In the first argument of `f', namely `stdinEvent'
>     In the second argument of `fmap', namely `(f stdinEvent)'
>     In the second argument of `forkE', namely
>         `(fmap putChar (f stdinEvent))'
> Failed, modules loaded: none.
>
> I posted the full details up at,
> http://www.hpaste.org/fastcgi/hpaste.fcgi/view?id=2810#a2810

Oops.
I just found a fix for the EventTut example!   It was posted after 
I did all my searching a few weeks ago ..

Patch generated by Koh Wei Jie,

-- Inside ConsoleAdapter .. adapt function
-- Change
         (stdinEvent, stdinFeed) <- makeEvent clock
-- To
         (stdinFeed, stdinEvent) <- makeEvent clock

I put the full modified source here .. as a follow up.
http://www.hpaste.org/fastcgi/hpaste.fcgi/view?id=2810#a2811

Sorry for the false alarm.

Now as Koh Jie said .. 

"Now to figure out how to use this stuff."


Tom



> I also tried the Example.hs (that comes with the 0.10.5 package)
> but it fails with many errors even after I replaced the import
> to what I believed was appropriate.
>
> .....
> --import Reactive.Reactive
> import FRP.Reactive
> ........
>
> Examples.hs:72:19:
>     Not in scope: type constructor or class `Reactive'
> Examples.hs:76:17: Not in scope: `mkEvent'
> Examples.hs:81:20: Not in scope: `replace'
> Examples.hs:85:17: Not in scope: `mkEvent'
> Examples.hs:94:16: Not in scope: type constructor or class `Sink'
>
> I know Reactive is in the state of flux so I don't expect things to work
> without a bit of hacking but a little help would be greatly (!!!) 
> appreciated just to get me started. I've tried wandering the web without
> success.
>
> Thanks,
>
> Tom
>
>
>
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