- Libraries - Haskell.org

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

20 Jan '04

1 0

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/

1 0

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

19 Jan '04

1 0

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

1 0

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"++)

6 5

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

18 Jan '04

1 0

Info regarding vigra
by Has 18 Jan '04

18 Jan '04

how Vigra™ works. So you can better understand, what Vigra can do for you. If you are sensible about your health, reflect on what you can do for your seual health, to keep the chances that you will need Vigra as low as possible. governing frictions dreariness, virtuoso. Inrease Seks Drive Bost Seual Performance Fuller & Harder Erecions Inrease Stamna & Endurance Quicker Rechages http://www.securemedpills.com/index.php?pid=pharmaboss airliner gorge coiling, normally. bleach squadrons lures, disrupted. Thanks, stoops

1 0

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

4 7

Re: Database interfaces?
by Dominic Steinitz 17 Jan '04

17 Jan '04

In the end, the HSQL toolkit provided enough so I didn't do anything further. It's good news that the HaskellDB project is being revived. Dominic. > > Date: Wed, 14 Jan 2004 14:53:12 -0800 (PST) > From: Christopher Milton <cmiltonperl(a)yahoo.com> > To: libraries(a)haskell.org > Subject: Re: Database interfaces? > Message-ID: <20040114225312.69079.qmail(a)web20808.mail.yahoo.com> > In-Reply-To: <opr1reytgunrnk38(a)mail.xs4all.nl> > Content-Type: text/plain; charset=us-ascii > MIME-Version: 1.0 > Precedence: list > Message: 2 > > --- Daan Leijen <daanleijen(a)xs4all.nl> wrote: > > On Tue, 13 Jan 2004 19:01:41 -0800 (PST), Christopher Milton > > <cmiltonperl(a)yahoo.com> wrote: > > > What happened to the Haskell database interfaces project? > > > > Hi Christopher, > > > > I don't know exactly what the "Haskell database interfaces project" is, but > > here are some developments that you might want to know about: > > Dominic Steinitz was leading an effort back in Jan/Feb 2003, but it seemed > to fizzle out, or at least I never heard about it again. > > > 1) Krasimir Angelov's HSQL toolkit provides (untyped) access to ODBC, MySQL > > and > > PostgresSQL databases. It doesn't return meta information yet. > > <http://htoolkit.sourceforge.net/> > > > > 2) wxHaskell has extensive ODBC support (but only tested on windows as yet). > > also untyped but with meta-information. > > <http://wxhaskell.sourceforge.net/doc/Graphics.UI.WXCore.Db.html> > > > > 3) Haskell/DB is being revived to provide typed access to databases. This > > is a student project at Chalmers. You can reach them at > > <dp03-7(a)mdstud.chalmers.se>, and I think it was Anders Höckersten who > > is doing it? > > Now that Haskell has functional dependencies, you can mimick just enough > > of TREX with nested cartesian products to use HaskellDB without TREX. > > I think they use HSQL for the low-level access :-( (that is meant > > funny:-) > > Typed access, that's exactly it. I'll have to contact the folks at Chalmers. > > Thank you. > > Chris > > ===== > Christopher Milton > cmiltonperl(a)yahoo.com

1 0

help on project
by CHOPRA A. (230365) 16 Jan '04

16 Jan '04

Hi there.. I am undertaking a project in haskell to represent Proofs graphically using Haskell School of expression . i was wondering how to go ahead with the class definition and module structure. if any one has any idea about how i should approach this project, please email back thanks aloke

1 0