On 09/15/2012 11:16 PM, Ertugrul Söylemez wrote:

Summary: FRP is about handling time-varying values like they were regular values.

Ouch!... Ouch!... My head is beginning to explode! So, I think I understand the main idea you just explained, but now I am curious about how this black magic is possible. Presumably, these mystical "time-varying values" would actually have to be some kind of partially applied function that receives a time parameter. But how do we, as in your example, add a literal number to a function? -- frigidcode.com indicium.us

Hello Ertugrul, Can I use your explanation for the HaskellWiki FRP page[0]? Regards, Henk-Jan van Tuyl [0] http://www.haskell.org/haskellwiki/Functional_Reactive_Programming -- http://Van.Tuyl.eu/ http://members.chello.nl/hjgtuyl/tourdemonad.html Haskell programming --

Christopher Howard wrote:

On 09/15/2012 11:16 PM, Ertugrul Söylemez wrote:

...

Summary: FRP is about handling time-varying values like they were regular values.

Ouch!... Ouch!... My head is beginning to explode!

So, I think I understand the main idea you just explained, but now I am curious about how this black magic is possible. Presumably, these mystical "time-varying values" would actually have to be some kind of partially applied function that receives a time parameter. But how do we, as in your example, add a literal number to a function?

As Ertugrul indicated, you first turn the literal number into a function (namely the constant function) and then perform arithmetic with that function. I have a few slides that may useful in understanding the "time-varying values as ordinary values" point better http://apfelmus.nfshost.com/blog/2012/07/15-frp-tutorial-slides.html Of course, keep in mind that at the end of the day, the Behavior and Event types are going to be opaque. This is because the literal Behavior a = Time -> a implementation would be very inefficient. Best regards, Heinrich Apfelmus -- http://apfelmus.nfshost.com

Nathan Hüsken wrote:

I must admit netwire 4 catched my interest. Would you consider it ready enough to try it or will I (beeing still more or less a haskell novice) despair of it?

Install it with documentation enabled. There is a quickstart tutorial in the Control.Wire module, so just open its Haddock documentation: cd netwire cabal install --enable-documentation Assuming a Unix-like OS the documentation will be installed in ~/.cabal/share/doc/. Open the index.html and select the Control.Wire module. To install with documentation by default just uncomment and set 'documentation' to True in your ~/.cabal/config. The tutorial says that it's for the experienced, impatient Haskell programmer, but it should be quite accessible even for beginners who understand the syntax and the basics of the type system. You can use it in production, because the interface won't change anymore. I'm just improving documentation and adding some further utilities before the official release. Feedback is very much appreciated. =) Greets, Ertugrul -- Not to be or to be and (not to be or to be and (not to be or to be and (not to be or to be and ... that is the list monad.