Re: [Haskell-cafe] Functional Reactive Web Application Framework?
Yes, I didn't realise that until Arjun mentioned that. I'm going to try to find some time to look more closely at Flapjax... -Rob On Wed, May 13, 2009 at 11:30 PM, Don Stewart d...@galois.com wrote: wrwills: The only web-oriented frp framework that I know of is Flapjax http://www.flapjax-lang.org/ Flapjax is javascript so possibly there could be a way to integrate it into Haskell using HJavascript? Maybe it could even be integrated into Happstack? I'm also quite new to Haskell. Isn't the flapjax compiler implemented in Haskell? -- Don ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Functional Reactive Web Application Framework?
The only web-oriented frp framework that I know of is Flapjax http://www.flapjax-lang.org/ Flapjax is javascript so possibly there could be a way to integrate it into Haskell using HJavascript? Maybe it could even be integrated into Happstack? I'm also quite new to Haskell. -Rob ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Functional Reactive Web Application Framework?
2009/5/13 Robert Wills wrwi...@gmail.com: The only web-oriented frp framework that I know of is Flapjax http://www.flapjax-lang.org/ Flapjax is javascript so possibly there could be a way to integrate it into Haskell using HJavascript? Maybe it could even be integrated into Happstack? I'm also quite new to Haskell. -Rob ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe There is this link posted on reddit... http://ambassadortothecomputers.blogspot.com/2009/04/functional-reactive-ajax-in-ocaml.html http://www.reddit.com/r/programming/comments/8jqgn/monadic_functional_reactive_ajax_in_ocaml/ Cheers, Thu ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Functional Reactive Web Application Framework?
Flapjax is javascript so possibly there could be a way to integrate it into Haskell using HJavascript? Maybe it could even be integrated into Happstack? The Flapjax compiler is written in Haskell, so that might help. I assume you want to write FRP in a Haskell-embedded DSL and generate FRP'd JavaScript. If you wish to use Flapjax as a supporting library I'd be glad to help. Arjun ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Functional Reactive Web Application Framework?
I assume you want to write FRP in a Haskell-embedded DSL and generate FRP'd JavaScript. If you wish to use Flapjax as a supporting library I'd be glad to help. I'm curious: how difficult is it nowadays for in-page JavaScript to control the evolution of its surrouding page, FRP-style? I used to do something like that, but with VRML+JavaScript instead of HTML +JavaScript (there's a screencast for those without VRML viewer;-): http://community.haskell.org/~claus/FunWorlds/VRML/ and I found that mapping FRP style behaviours and events wasn't the problem (though VRML has better support for this than HTML), the problem was gaining the same advantages one would have from embedding FRP in a functional language. Problems included scoping, linking dynamically created material with enclosing scope (JavaScript being in strings with scopes separate from the enclosing VRML, VRML to be created dynamically also via strings, also in their own scope) ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Functional Reactive Web Application Framework?
oops, sorry, keyboard accident I assume you want to write FRP in a Haskell-embedded DSL and generate FRP'd JavaScript. If you wish to use Flapjax as a supporting library I'd be glad to help. I'm curious: how difficult is it nowadays for in-page JavaScript to control the evolution of its surrouding page, FRP-style? I used to do something like that, but with VRML+JavaScript instead of HTML +JavaScript (there's a screencast for those without VRML viewer;-): http://community.haskell.org/~claus/FunWorlds/VRML/ and I found that mapping FRP style behaviours and events wasn't the problem (though VRML has better support for this than HTML), the problem was gaining the same advantages one would have from embedding FRP in a functional language. Problems included scoping, linking dynamically created material with enclosing scope (JavaScript being in strings with scopes separate from the enclosing VRML, VRML to be created dynamically also via strings, also in their own scope) This became particularly obvious for dynamic recursion of reactive behaviours, somewhat like page n = code involving n `until` (keypress `then` (\key- page n)) How are such things handled in Flapjax, if it follows the embedded compiler approach? Claus ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Functional Reactive Web Application Framework?
This became particularly obvious for dynamic recursion of reactive behaviours, somewhat like page n = code involving n `until` (keypress `then` (\key- page n)) We have this function, which permits patterns like the one above: http://www.flapjax-lang.org/docs/#tagRec tagRec does not permit mutual recursion. We've considered writing a generalization that does. But, it's almost easier to imperatively close the loop. Arjun ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Functional Reactive Web Application Framework?
On Wed, May 13, 2009 at 06:46:45AM -0400, Arjun Guha wrote: Flapjax is javascript so possibly there could be a way to integrate it into Haskell using HJavascript? Maybe it could even be integrated into Happstack? The Flapjax compiler is written in Haskell, so that might help. I assume you want to write FRP in a Haskell-embedded DSL and generate FRP'd JavaScript. If you wish to use Flapjax as a supporting library I'd be glad to help. Arjun Actually, I wanted to use Flapjax as the base for client-side programming. I didn't think about combining Flapjax with HJavaScript, this is quite a good idea. However, this would is just one part of what I'd like to have. No doubt many things can be done on the client, but more serious work or database operations must be done on the server anyway. Ideally, I'd like to spare a programmer from: * Working with HTML (unless explicitly desired); Instead, I'd prefer to compose the pages from components, either predefined or user-defined. This could be done for example using DSL in Haskell. The components could be both lightweight (almost HTML), or heavyweight like menu, toolbar etc. * Transferring data between a server/client. Especially using FRP, this might be done very neatly I suppose. An event stream or a behavior could be transferred seamlessly by the framework from the client to the server and vice versa. The programmer would only see behaviors on either side. I've been working with the ZK framework http://zkoss.org/ lately, and it has many nice features. For example, composing pages from high-level components, the possibility to separate the layout of the pages form the controlling code, or sparing a programmer from working with HTML and HTTP requests - everything is done just by manipulating component objects and handling events. However, it's not functional at all. I believe FRP would be much better solution than classical event handling. And secondly, it's in Java, which is nothing bad (actually my code is in Scala), just it's not Haskell. Happsstack looks good, though I didn't have time to study it. Thanks for the links for OCAML JavaScript FRP, it looks iteresting too. Petr ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Functional Reactive Web Application Framework?
wrwills: The only web-oriented frp framework that I know of is Flapjax http://www.flapjax-lang.org/ Flapjax is javascript so possibly there could be a way to integrate it into Haskell using HJavascript? Maybe it could even be integrated into Happstack? I'm also quite new to Haskell. Isn't the flapjax compiler implemented in Haskell? -- Don ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
