January 2004 - Libraries

PEN1S Patch - Enla.rge Your C0CK ! ! . . . . . . . party
by Dp 21 Jan '04

21 Jan '04

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Library Infrastructure code & help wanted
by Isaac Jones 20 Jan '04

20 Jan '04

Greetings, I'm looking for some help on the library infrastructure project. The project and its goals are explained here: http://www.haskell.org/libraryInfrastructure/ And the code is here: http://www.haskell.org/libraryInfrastructure/code.html In brief, the Library Infrastructure Project is an effort to provide a framework for developers to more effectively contribute their software to the Haskell community. I'm hoping to not have to implement this entire proposal myself, and I'm very flexible about implementation details. I've made some concrete progress, and I just mirrored my code repository on my web site, so now is the time to get involved! Specifically, at the moment, I want a couple of things: 1) A version parser. I implemented a parser which parses versions that are made of dates, or simple numeric versions. I'd like it to do more kinds of versions, though. Distribution.Version is attached. What is this version stuff used for? Well for one thing, you can use it to say something like: ./haskell-config --user list "MyPackage>1.2" where "MyPackage" is the name of a package. This will list all of the user-installed packages whose versions are greater than 1.2. If you look at the HUnit tests at the bottom of the attached file, you'll get a good idea of what it does right now. It uses Parsec. BTW, I understand that the Debian project has some standard version number parser which might give you some ideas. 2) I also would like someone to help out with the package configuration file IO. Right now, it uses HaXmL, with no generated code. Someone who has seen HaXmL before could give me advice about how my code could be better, submit patches, or rewrite it. As discussed on libraries(a)haskell.org, I'm open to not using XML if someone wants to redo what I've got there (not a huge task). This parsing code is in Distribution.Package. I do want something more flexible than straight-up read/show. 3) Someone to make it work with in nhc & hugs. The HaXmL page says that it doesn't work w/ Hugs yet (can anyone tell me why?), so that's one step. Also, at least for the version of NHC I have on my system, Parsec is different. So maybe we have to move away from Parsec, or maybe a different version thereof? It is absolutely vital for this project to be completely cross-platform and cross-compiler, so if we have to avoid depending on such things, I'm very willing to change. 4) Someone to make it work with Windows. Avoid using a filename that's called "Aux" ;) ABOUT THE CODE: It only works with GHC at the moment (see above) :( Right now what I've got is a first stab at Distribution.Package and haskell-config as explained in the proposal [1], though some things may have changed. It's hosted with Arch[2], a newish version control system. You can branch my code on your own machine and submit patches. Arch has some tools to help with patches. I've also provided a tarball. Arch is cool, though. You should try it. The HUnit tests in some of the modules should be pretty illuminating. The interactive help for haskell-config is pretty OK. Get the code here: http://www.haskell.org/libraryInfrastructure/code.html peace, isaac [1] http://www.haskell.org/libraryInfrastructure/proposal/index.html [2] http://regexps.srparish.net/www/

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Don't get busted ! ! . . . . . . . . . speech
by Steve 20 Jan '04

20 Jan '04

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LIP and the AAP project
by Isaac Jones 19 Jan '04

19 Jan '04

Greetings, Now that I have at least gotten something started on the Library Infrastructure Project, I'm going to bend some of my energy toward the build/install issues for Haskell modules. The plan at this point, which is summarized on the project web site[1] is to attempt to leverage HMake's usefulness as a non-compiler-specific build system. Since I wrote the proposal, I've been made aware of the AAP project[2]. Does anyone have any experience with this? Does anyone have a sense for how it might fit in with LIP? I know that Peter Simons seems to think it might. I haven't read through all of the documentation, but I suspect it might help us out with the CPAN-style distribution stuff, and perhaps the building stuff. One big objection I have with using it would be that Haskell modules would depend on Python (!), but I thought I'd let everyone know about it anyway. Seems like an interesting project, and we could quite possibly learn something from it. peace, isaac [1] http://www.haskell.org/libraryInfrastructure/ [2] http://www.a-a-p.org/

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Fwd: Want to have S E X, 20 times a day ?
by Clkwek-hmsa 19 Jan '04

19 Jan '04

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ANNOUNCE: HaXml-1.10
by Malcolm Wallace 19 Jan '04

19 Jan '04

Announcing a new release of HaXml. HaXml-1.10 ---------- http://haskell.org/HaXml The latest version (1.10) has the following features and fixes: * All being well, HaXml now works again for Hugs (versions >= September 2003). The library sources are installed using hugs-package, and the tools are installed as scripts for runhugs. * Fixed the internal (and external) representations of XML character references. * New combinators to `escape' and `unescape' reserved XML characters in text and attribute values has been contributed by George Russell. (e.g. to convert "<" into "<".) * Bugfixes to DtdToHaskell: A DTD content specification of the form <!ELEMENT A (B*,(C|(D?,E*)))> was incorrectly translated to the Haskell data A = A [B] (OneOf3 C (Maybe D) [E]) but the new (correct) translation is data A = A [B] (OneOf2 C (Maybe D,[E])) Regards, Malcolm

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less than serious - PreludeExts
by Shae Matijs Erisson 19 Jan '04

19 Jan '04

In the true spirit of wikiwiki comes PreludeExts, all the tiny useful bits of code you think should be in the Prelude, but aren't. http://www.haskell.org/hawiki/PreludeExts Anyway, this started when someone on #haskell wanted a permutations function for the Nth time. I read Koen's "this should be in the Prelude" comment for the Nth time, and PreludeExts was born. If you have small (or not so small) generally useful bits of code, you are invited to put them onto the PreludeExts page. -- Shae Matijs Erisson - 2 days older than RFC0226 #haskell on irc.freenode.net - We Put the Funk in Funktion 10 PRINT "HELLO" 20 GOTO 10 ; putStr $ fix ("HELLO\n"++)

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Re: Ejacu.late Like A P0RN Star!
by Hashmi 18 Jan '04

18 Jan '04

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Info regarding vigra
by Has 18 Jan '04

18 Jan '04

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List functions - "Under" operations
by Brandon Michael Moore 17 Jan '04

17 Jan '04

Hello, and welcome me to the list I think it would often be useful if the list functions with class constraints had versions paramaterized on a function mapping your element type into an instance of the classes, in addition to the "By" forms that take an implementation for the required class method. Almost all of the times I use the "By" functions follow that pattern: e.g. sortFoos :: [Foo] -> [Foo] sortFoos = sortBy (\x y -> compare (f x) (f y)) I suggest "Under" as a modifier. "By" would be nice (as in "sortBy fst", "sortBy valueOf", etc) but it's already taken. We are using the image under some function to control the list munging, so it seems appropriate. How does this sound? Brandon Moore

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