Re: [Haskell-cafe] Hugs, dotnet, C#...
Yes I have. I actually bought the few only F# books available. It's a nice language, and an incredible amount of work. The Visual Studio plugin also works well. But somehow I found Haskell cleaner... Its laziness is a better for me ;-) But I might switch back to F# someday, and then learning Haskell will have helped a lot. Hugh Perkins wrote: Have you tried F#? I mean, I havent ;-) but maybe it's an interesting half-way house? Presumably you can use all the standard .Net libraries (maybe good enough for getting asp.net working etc?), and you can still use FP constructs? I understand F# is not pure (I think?), and doesnt have monads, but hey, life's full of compromises ;-) ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Hugs, dotnet, C#...
On 10/3/07, Peter Verswyvelen [EMAIL PROTECTED] wrote:
I needed to type at least 3 times the amount of code, much
of which was boilerplate code, and the code is not elegant.
Reflection is your friend here.
Example. Code before reflection:
MyConfig
{
// some properties here
public MyConfig()
{
XmlDocument dom = XmlHelper.Loadxml(config.xml);
somevalue1 = getIntValue( dom, value1);
somevalue2 = getStringValue( dom, value2);
// blah, blah, blah...
}
}
With reflection:
MyConfig
{
// some properties here
public MyConfig()
{
ReflectionHelper.LoadMe( this, config.xml );
}
}
Just typed this in off the top of my head, so it might have errors in,
but you get the idea.
Of course, in this case you could just use Microsoft XmlSerializer,
but I quite like the flexibility of using my own serializer (it's not
that hard to write, just a hundred lines or so).
... but then, you can do something similar to display arbitrary
objects to html... or write to sql... or write to a proprietary
protocol... or ... many things!
I kindof know what you mean though. Declaring variable types is
kindof a pain, and of course anything to do with lists is insanely
easier to write in Haskell (/Erlang).
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Re: [Haskell-cafe] Hugs, dotnet, C#...
Thanks for the C# advise, but I was actually just comparing my C# code
with similar Haskell code. Yes, I also like aspect oriented programming,
dynamic code generation, and LINQ to avoid boilerplate code in C#, but
this is a Haskell group, and I want to be curried ;-)
But, for my students I'm actually building a small website, webservice,
database with some rich client applications, in C# 3.0... I would really
love to do that in Haskell, but I haven't got a clue how to start. I
would need a replacement for ASP.NET (e.g. generating HTML on the
server, similar to the PHP stuff), LINQ (translating Haskell to SQL),
webservice wrapper generators, webservice security, etc... Any hints on
useful Haskell packages would be very welcome. LINQ takes its ideas from
FP, so maybe Haskell already had something similar for decades? :)
Hugh Perkins wrote:
On 10/3/07, Peter Verswyvelen [EMAIL PROTECTED] wrote:
I needed to type at least 3 times the amount of code, much
of which was boilerplate code, and the code is not elegant.
Reflection is your friend here.
Example. Code before reflection:
MyConfig
{
// some properties here
public MyConfig()
{
XmlDocument dom = XmlHelper.Loadxml(config.xml);
somevalue1 = getIntValue( dom, value1);
somevalue2 = getStringValue( dom, value2);
// blah, blah, blah...
}
}
With reflection:
MyConfig
{
// some properties here
public MyConfig()
{
ReflectionHelper.LoadMe( this, config.xml );
}
}
Just typed this in off the top of my head, so it might have errors in,
but you get the idea.
Of course, in this case you could just use Microsoft XmlSerializer,
but I quite like the flexibility of using my own serializer (it's not
that hard to write, just a hundred lines or so).
... but then, you can do something similar to display arbitrary
objects to html... or write to sql... or write to a proprietary
protocol... or ... many things!
I kindof know what you mean though. Declaring variable types is
kindof a pain, and of course anything to do with lists is insanely
easier to write in Haskell (/Erlang).
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Re: [Haskell-cafe] Hugs, dotnet, C#...
Have you tried F#? I mean, I havent ;-) but maybe it's an interesting half-way house? Presumably you can use all the standard .Net libraries (maybe good enough for getting asp.net working etc?), and you can still use FP constructs? I understand F# is not pure (I think?), and doesnt have monads, but hey, life's full of compromises ;-) ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Hugs, dotnet, C#...
On 10/10/07, Peter Verswyvelen [EMAIL PROTECTED] wrote: A noble goal and I wish you luck. I'd love to see if you get .NET working with Haskell - I have tried to figure it out from that old build of Hugs and never had any luck. Tantalizingly, the GHC source has some Dotnet stuff in it but it doesn't seem to be in use anywhere ( http://darcs.haskell.org/libraries/base/GHC/Dotnet.hs). Anyways, to answer your questions: * ASP.net - I think you want to look at HAps here - http://happs.org/ * LINQ, etc. - I don't know but there are several database libraries available on hackage ( http://hackage.haskell.org/packages/archive/pkg-list.html#cat:Database) * webServices - Unknown but I have been using HXT lately (a haskell XML parser). It was a nightmare to figure out how to use it, but by reading the thesis about building an RDF parser I was able to make some decent progress. Maybe hackage has a webservice library? If you make some progress please share! Justin ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Hugs, dotnet, C#...
Hi Peter, There is a Dotnet tree in the Hugs source code files, which I believe is what supports dotnet. As far as I am aware, it probably won't work. A windows developer may be able to build it, but I've never tried. You might also be interested to know that Yhc supports --dotnet to generate a dotnet binary. I think it can FFI call the dotnet framework, but I'm not sure. IDE's are hard, and only Microsoft does them right - perhaps one day if Haskell becomes popular enough we'll get something. Thanks Neil On 10/3/07, Peter Verswyvelen [EMAIL PROTECTED] wrote: In the (Win)Hugs documentation, I found Only the ccall, stdcall and dotnet calling conventions are supported. All others are flagged as errors. However, I fail to find any more information on how to invoke dotnet methods. This might be really handy for me, as I'm very familiar with the dotnet framework. For example, yesterday I rewrote and extended a program that I wanted to develop in Haskell in just 3 hours using dotnet, while I spend weeks trying do this in Haskell. Of course, I'm a Haskell newbie and a dotnet expert, so this is not a fair comparison. However, I got a strange feeling, which I want to share with you :) First of all, it was a *horrible* experience to program C# again; I needed to type at least 3 times the amount of code, much of which was boilerplate code, and the code is not elegant. Haskell really changed my point of view on this; before I knew Haskell, I found C# (I'm talking C# 3.0 here) a really neat and nice language. On the other hand, the great Visual Studio IDE and Resharper addin made it at least 3 times faster to type, navigate, refactor, and debug the code... Somehow, I get things done really really really fast in C#, albeit in an ugly way. Once again, I just wish Haskell had such an IDE... And yes, I know of the existance of Visual Haskell, EclipseFP, Haskell Mode for Emacs (which I'm using), VIM, YI, but still, these do not compare with the experience I have when using Visual Studio/Resharper (or Eclipse or IntelliJ/IDEA for Java). But that might just be me of course... A slightly frustrated Peter ;-) BTW: I don't want to bring up the IDE discussion again, no really ;-) ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Hugs, dotnet, C#...
In the (Win)Hugs documentation, I found Only the ccall, stdcall and *dotnet *calling conventions are supported. All others are flagged as errors. However, I fail to find any more information on how to invoke dotnet methods. This might be really handy for me, as I'm very familiar with the dotnet framework. For example, yesterday I rewrote and extended a program that I wanted to develop in Haskell in just 3 hours using dotnet, while I spend weeks trying do this in Haskell. Of course, I'm a Haskell newbie and a dotnet expert, so this is not a fair comparison. However, I got a strange feeling, which I want to share with you :) First of all, it was a *horrible* experience to program C# again; I needed to type at least 3 times the amount of code, much of which was boilerplate code, and the code is not elegant. Haskell really changed my point of view on this; before I knew Haskell, I found C# (I'm talking C# 3.0 here) a really neat and nice language. On the other hand, the great Visual Studio IDE and Resharper addin made it at least 3 times faster to type, navigate, refactor, and debug the code... Somehow, I get things done really really really fast in C#, albeit in an ugly way. Once again, I just wish Haskell had such an IDE... And yes, I know of the existance of Visual Haskell, EclipseFP, Haskell Mode for Emacs (which I'm using), VIM, YI, but still, these do not compare with the experience I have when using Visual Studio/Resharper (or Eclipse or IntelliJ/IDEA for Java). But that might just be me of course... A slightly frustrated Peter ;-) BTW: I don't want to bring up the IDE discussion again, no really ;-) ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
