[Haskell-cafe] The Good, the Bad and the GUI

[Alexander Vieth]

> Oh, please. Haskell is great for parsing, because you can build a parser with e.g. parsec, attoparsec, uuparse, trifeca, in no time. Even I can do it. Haskell is great for concurrency, because it has lightweight threads, STM, and a fabulous book about it. Haskell is great for GUIs, because.... how about you finish this statement, I don't know how to.

Before parsec, attoparsec, uuparse, et al were invented, was Haskell no good for parsing? When we speak of Haskell do we speak of the entire ecosystem, or just the language itself? I think Heinrich meant that Haskell, the language, is probably capable of carrying a great library for expressing GUI's, even if we haven't yet seen it implemented.

Alex

On 2014-08-13, at 5:19 PM, Wojtek Narczyński wrote:

> On 13.08.2014 15:42, Heinrich Apfelmus wrote:
>> Validation is mainly a question of *how* to present feedback about
>> invalid data to the user -- for instance by making invalid data
>> impossible to enter, or by showing errors in red and retaining the last correct value, etc.
> 
> I don't even know how to capture validation rules in such a way that they were easy to use from the GUI layer. I suspect if they were captured well, whatever well might mean in this context, a functioning GUI could be autogenerated from those rules.
> 
> And I don't understand FRP code. I could however understand Eduardo's client side formlets almost immediately. Not now they work below, how to use them.
> 
>> Still, even for the more narrow problem of forms and input validation, I don't see how you arrive at your claim that "Haskell is however not great for GUIs". This seems like a problem that can be solved with a traditional DSL approach, and I would be surprised if Haskell were unsuitable as a host language, contrary to what your claim seems to imply. Whether DSLs along these lines are already available is another question. Alberto mentioned one, another one would be [1].
>> 
> 
> Oh, please. Haskell is great for parsing, because you can build a parser with e.g. parsec, attoparsec, uuparse, trifeca, in no time. Even I can do it. Haskell is great for concurrency, because it has lightweight threads, STM, and a fabulous book about it. Haskell is great for GUIs, because.... how about you finish this statement, I don't know how to.
> 
> -- 
> Kind reagrds,
> Wojtek Narczynski
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