- Haskell - Haskell.org

Re: [Haskell] ANNOUNCE: OpenGLRaw 1.0.0.0
by Tillmann Vogt 14 Jun '09

14 Jun '09

Sven Panne schrieb: > Am Donnerstag, 11. Juni 2009 19:23:17 schrieb Bryan O'Sullivan: >> [...] I think that "Graphics.Rendering." is clutter, and "OpenGL.GL." seems >> redundant to me. [...] > > I forgot to mention one thing here: "OpenGL.GL" is currently *not* redundant, > there is "OpenGL.GLU" in the OpenGL package, too. GL and GLU are separate > libraries, even living in separate DLLs/*.sos, having separate headers, etc., > so they should be kept separate in Haskell at some level, too. > > Nevertheless, with OpenGL 3.1 GLU is dead, Are you sure? glu is mainly for converting an arbitrary polygon into triangles. This is an art and so obviously wasn't put into hardware or driver. From a previous post I remember that tesselation was mentioned. But looking at some presentation slides from AMD/ATI I understand that tesselation in directx11 is using the following primitive patches: Triangles and Tri-patches, Quads and Quad Patches, Lines and Line Patches, see http://ati.amd.com/developer/gdc/2008/Tatarchuk-Tessellation_GDC08.pdf slide 31. I haven't found a lot of information in the OpenGL 3.1 Spec, so I assume they will do it similar to directx11. So, if glu is still needed, until I use a better algorithm in my library. > anyway, so in future versions there > will be no ".GL" part in the package names. > > Cheers, > S. > > _______________________________________________ > Haskell mailing list > Haskell(a)haskell.org > http://www.haskell.org/mailman/listinfo/haskell

1 0

ANNOUNCE: Turbinado V0.7
by Alson Kemp 14 Jun '09

14 Jun '09

Turbinado is a Ruby-On-Rails-like web server and web framework for Haskell. It is designed to make creating web application using Haskell both easy and joyful. Turbinado continues to progress and I'd like to announce Turbinado V0.7. The primary additions are FastCGI support and a new templating system (which includes HAML and HTML support). Additional details are here: http://www.alsonkemp.com/turbinado/announce-turbinado-v07/. In order to accommodate collaboration, I've moved the project's homepage to GitHub: Homepage: http://wiki.github.com/turbinado/turbinado Source code: http://github.com/turbinado/turbinado

1 0

ANN: hledger 0.6 released
by Simon Michael 13 Jun '09

13 Jun '09

I'm pleased to announce the release of hledger 0.6. For docs, online demo etc., see http://hledger.org . Some pre-built binaries are now available at http://hledger.org/ binaries . Or, install with: cabal install hledger [-fhapps] [-fvty]. (Using the latest Haskell Platform, "cabal install hledger -fhapps" works on gnu/ linux, mac and windows. Hurrah!) I'd like to hear feedback, especially if you hit trouble getting started. Happy tracking! - Simon (sm) 2009/06/13 hledger 0.6 ...................... * now cabal-installable on unix, mac, and windows, with Haskell Platform * provide experimental platform binaries * parsing: fix a silly failure to open ledger file paths containing ~ * parsing: show better errors for unbalanced transaction and missing default year * parsing: allow parentheses and brackets inside account names, as ledger does * parsing: fail on empty account name components, don't just ignore * add: description passed as arguments now affects first transaction only * add: better handling of virtual postings and default amounts * print, register: show virtual accounts bracketed/parenthesised * web: improved web ui supporting full patterns & period expressions * new "stats" command reports some ledger statistics * many dev/doc/deployment infrastructure improvements * move website into darcs repo, update home page * move issue tracker to google code Release stats: * Contributors: Simon Michael * Days since last release: 21 * Commits: 94 * Lines of non-test code: 2865 * Tests: 82 * Test coverage: 53% expressions * Known errors: 3 (inconsistent eliding, vty-related failures) * Performance: similar (http://hledger.org/profs/200906131120.bench)

1 0

Haskell Weekly News: Issue 121 - June 13, 2009
by Brent Yorgey 13 Jun '09

13 Jun '09

--------------------------------------------------------------------------- Haskell Weekly News http://sequence.complete.org/hwn/20090613 Issue 121 - June 13, 2009 --------------------------------------------------------------------------- Welcome to issue 121 of HWN, a newsletter covering developments in the [1]Haskell community. Announcements purely functional lazy non-deterministic programming. Sebastian Fischer [2]announced the [3]explicit-sharing library, which supports lazy functional-logic programming in Haskell. nntp 0.0.1. Maciej Piechotka [4]announced the release of [5]nntp, a library to connect to nntp (i.e. mainly USENET) servers. OpenGLRaw 1.0.0.0. Sven Panne [6]announced the release of [7]OpenGLRaw, a low-level binding for OpenGL. The eventual goal is to make the OpenGL package easier to install, more modular and a bit more flexible. pgm-0.1 on Hackage. Frederick Ross [8]announced [9]pgm, a pure Haskell library to read and write PGM images. It seamlessly handles the divide between 1 and 2 byte per pixel images; reads and writes UArrays; can handle multiple PGMs concatenated one after another in a file; and encodes and decodes all comments in the PGM header, which can be used to drop arbitrary metadata into files in a human readable manner. iteratee-0.2.1 released. John Lato [10]announced the release of [11]iteratee-0.2.1, a major update to the iteratee library. This library provides types and functions for performing enumerator/iteratee based I/O operations in Haskell, as [12]described by Oleg. The new version is a large redesign, including support for resumable exceptions and a greatly simplified interface. testrunner-0.9. Reinier Lamers [13]announced [14]testrunner, a new framework for running unit test. It can run unit tests in parallel; can run QuickCheck and HUnit tests as well as simple boolean expressions; and comes with a ready-made main function for your unit test executable. serial-0.2. Frederick Ross [15]announced version 0.2 of [16]serial, a library for working with line-oriented POSIX serial ports. hunp-0.0. Deniz Dogan [17]announced [18]hunp, a command-line utility which automagically calls the right "unpacker" program for you and works on both files and directories. Nemesis : easy task management. Jinjing Wang [19]announced a new release of [20]nemesis, a simple rake-like task management tool. Data.Reify.CSE. Sebastiaan Visser [21]announced the [22]data-reify-cse module, which implements common sub-expression elimination for graphs generated by the Data.Reify package. This package might especially be useful for optimizing simple compilers for referentially transparent domain specific languages. Hac phi accommodation: register by June 15 for reduced rate! Brent Yorgey [23]reminded anyone interested in attending [24]Hac phi that Monday 15 June is the deadline for getting a special reduced hotel rate. alloy-1.0.0 (generic programming). Neil Brown [25]announced the [26]first release of the [27]Allow generic programming library. It is intended to be a fairly fast blend of several other generics approaches, such as SYB (but without the dynamic typing) and Uniplate (but allowing an arbitrary number of target types), for performing transformations on specific types in large tree structures. StrictBench 0.1 - Benchmarking code through strict evaluation. R.A. Niemeijer [28]announced the release of [29]StrictBench, a library for timing full evaluation of values. haskeem 0.7.0 uploaded to hackage. Uwe Hollerbach [30]announced [31]haskeem, a small scheme interpreter written in Haskell. numtype 1.0 -- Type-level (low cardinality) integers. Bjorn Buckwalter [32]announced the [33]Numeric.NumType module, now released as its own package, which implements a unary type-level representation of integers, supporting addition, subtraction, multiplication, and division. Google Summer of Code Progress updates from participants in the 2008 [34]Google Summer of Code. space profiling. Gergely Patai has some [35]pretty graphs generated by his profiling library. haskell-src-exts. Niklas Broberg is [36]quite close to releasing haskell-src-exts 1.0.0, as soon as he has full and correct support for (almost) everything code-related, with only a few things left to do. He also wrote [37]a post explaining the intricacies of parsing code containing the 'forall' keyword (well, whether it is a keyword depends on which extensions are enabled...) fast darcs. Petr Rockai made a bit less progress this week, with finals and other things interfering, but [38]made some progress on some documentation, tracking down a performance regression, and other things. Discussion Adding an ignore function to Control.Monad. Gwern Branwen [39]proposed adding an 'ignore' function to Control.Monad which explicitly changes an m a into a m (). Bikeshedding (and some useful discussion) ensued. Wiki user accounts. Philippa Cowderoy began a [40]discussion of what to do about the current situation with wiki user accounts (namely, that account creation is disabled due to spam, and the one maintainer of the wiki can't always respond to account creation requests instantly). Lightweight type-level dependent programming in Haskell. Ryan Ingram made an interesting [41]post about implementing lightweight closed type classes in Haskell. who's up for a hackathon? (ICFP, late Aug, early Sept). Eric Kow [42]wanted to know who would be interested in having a hackathon immediately before or after ICFP in Edinburgh. Jobs Galois is hiring functional programmers. Don Stewart [43]announced that [44]Galois is hiring! See the announcement for more details. Blog noise [45]Haskell news from the [46]blogosphere. Blog posts from people new to the Haskell community are marked with >>>, be sure to welcome them! * Niklas Broberg: [47]GSoC status report, week 3. * Joachim Breitner: [48]Introducing L-seed. * Conal Elliott: [49]Memoizing polymorphic functions - part two. * London Haskell Users Group: [50]Next Meeting: Sean Leather, Fun and generic things to do with EMGM. * David Amos: [51]It's on Hackage!. Haskell for Maths is now just a cabal-install away. * Michael Snoyman: [52]Filename encoding issues. * David Amos: [53]Permutation groups. * Edward Kmett: [54]Recursion Schemes: A Field Guide (Redux). * mightybyte: [55]Intro to HAppS-State. * Conal Elliott: [56]Memoizing polymorphic functions - part one. * Lennart Augustsson: [57]More LLVM. * Roman Cheplyaka: [58]Don't play with your monads. * Galois, Inc: [59]Tech Talk: Orc in Haskell. * Petr Rockai: [60]soc progress 3. Progress on Petr's GSoC darcs project. * Magnus Therning: [61]Using msmtp with darcs. * Erik de Castro Lopo: [62]Debian Maintainer. Erik is now a Debian maintainer, and plans to give Haskell on Debian a much-needed facelift! * Niklas Broberg: [63]What's in a forall?. More Haskell parsing fun. * Well-Typed.Com: [64]GHC, primops and exorcising GMP. * Niklas Broberg: [65]What's in a forall?. More than you might expect! * >>> Zsol: [66]Visualizing the graphrewrite process behind Haskell. Work on the [67]visual-graphrewrite package. * Eric Kow (kowey): [68]testrunner for practical quickcheck. * Sebastian Fischer: [69]Explicit sharing of monadic effects. Purely functional, lazy, non-deterministic programming! * LHC Team: [70]New backend. * >>> James McNeill: [71]Messing with Haskell. * Dan Piponi (sigfpe): [72]Hashing Molecules. * Shin-Cheng Mu: [73]Longest Segment Satisfying Suffix and Overlap-Closed Predicates. * David Amos: [74]Simple graphs with Math.Combinatorics.Graph. David shows off his Haskell for Maths library. * Gergely Patai: [75]More colourful graphs. Graphs from Gergely's GSoC project on profiling. * Bryan O'Sullivan: [76]Case conversion and text 0.3. The text module gets solid, standards-compliant case conversion. * Bjorn Buckwalter: [77]numtype 1.0: Type-level (low cardinality) integers. * >>> Jörn Dinkla: [78]Parallelization with Haskell - Easy as can be. Quotes of the Week * sjanssen: in our sub-culture, "considered harmful" means "burn it with fire" * quicksilver: after all, anyone who insists on talking about himself in the third person is clearly someone to be reckoned with. About the Haskell Weekly News New editions are posted to [79]the Haskell mailing list as well as to [80]the Haskell Sequence and [81]Planet Haskell. [82]RSS is also available, and headlines appear on [83]haskell.org. To help create new editions of this newsletter, please see the information on [84]how to contribute. Send stories to byorgey at cis dot upenn dot edu. The darcs repository is available at darcs get [85]http://code.haskell.org/~byorgey/code/hwn/ . References 1. http://haskell.org/ 2. http://article.gmane.org/gmane.comp.lang.haskell.libraries/11265 3. http://sebfisch.github.com/explicit-sharing 4. http://article.gmane.org/gmane.comp.lang.haskell.general/17271 5. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/nntp 6. http://www.haskell.org//pipermail/haskell/2009-June/021402.html 7. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/OpenGLRaw 8. http://article.gmane.org/gmane.comp.lang.haskell.general/17263 9. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/pgm 10. http://article.gmane.org/gmane.comp.lang.haskell.general/17262 11. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/iteratee 12. http://okmij.org/ftp/Streams.html#iteratee 13. http://article.gmane.org/gmane.comp.lang.haskell.general/17258 14. http://projects.haskell.org/testrunner/ 15. http://article.gmane.org/gmane.comp.lang.haskell.general/17257 16. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/serial 17. http://article.gmane.org/gmane.comp.lang.haskell.cafe/59843 18. http://hackage.haskell.org/package/hunp 19. http://article.gmane.org/gmane.comp.lang.haskell.cafe/59824 20. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/nemesis 21. http://article.gmane.org/gmane.comp.lang.haskell.cafe/59807 22. http://hackage.haskell.org/package/data-reify-cse 23. http://article.gmane.org/gmane.comp.lang.haskell.cafe/59741 24. http://haskell.org/haskellwiki/Hac_%CF%86 25. http://article.gmane.org/gmane.comp.lang.haskell.cafe/59631 26. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/alloy 27. http://twistedsquare.com/Alloy-Tutorial.pdf 28. http://article.gmane.org/gmane.comp.lang.haskell.cafe/59605 29. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/StrictBench 30. http://article.gmane.org/gmane.comp.lang.haskell.cafe/59551 31. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/haskeem 32. http://article.gmane.org/gmane.comp.lang.haskell.cafe/59543 33. http://dimensional.googlecode.com/ 34. http://hackage.haskell.org/trac/summer-of-code/wiki/SoC2008 35. http://just-bottom.blogspot.com/2009/06/more-colourful-graphs.html 36. http://nibrofun.blogspot.com/2009/06/gsoc-status-report-week-3.html 37. http://nibrofun.blogspot.com/2009/06/whats-in-forall.html 38. http://web.mornfall.net/blog/soc_progress_3.html 39. http://thread.gmane.org/gmane.comp.lang.haskell.libraries/11278 40. http://thread.gmane.org/gmane.comp.lang.haskell.cafe/59814 41. http://thread.gmane.org/gmane.comp.lang.haskell.cafe/59749 42. http://thread.gmane.org/gmane.comp.lang.haskell.cafe/59737 43. http://article.gmane.org/gmane.comp.lang.haskell.general/17264 44. http://www.galois.com/ 45. http://planet.haskell.org/ 46. http://haskell.org/haskellwiki/Blog_articles 47. http://nibrofun.blogspot.com/2009/06/gsoc-status-report-week-3.html 48. https://www.joachim-breitner.de/blog/archives/330-Introducing-L-seed.html 49. http://conal.net/blog/posts/memoizing-polymorphic-functions-part-two/ 50. http://www.londonhug.net/2009/06/12/next-meeting-sean-leather-fun-and-gener… 51. http://haskellformaths.blogspot.com/2009/06/its-on-hackage.html 52. http://blog.snoyman.com/2009/06/11/filename-encoding-issues/ 53. http://haskellformaths.blogspot.com/2009/06/permutation-groups.html 54. http://comonad.com/reader/2009/recursion-schemes/ 55. http://softwaresimply.blogspot.com/2008/02/intro-to-happs-state.html 56. http://conal.net/blog/posts/memoizing-polymorphic-functions-part-one/ 57. http://augustss.blogspot.com/2009/06/more-llvm-recently-someone-asked-me-on… 58. http://ro-che.blogspot.com/2009/06/dont-play-with-your-monads.html 59. http://www.galois.com/blog/2009/06/09/tech-talk-orc/ 60. http://web.mornfall.net/blog/soc_progress_3.html 61. http://therning.org/magnus/archives/656 62. http://www.mega-nerd.com/erikd/Blog/CodeHacking/Debian/debian_maintainer.ht… 63. http://nibrofun.blogspot.com/2009/06/whats-in-forall.html 64. http://blog.well-typed.com/2009/06/ghc-primops-and-exorcising-gmp/ 65. http://nibrofun.blogspot.com/2009/06/whats-in-forall.html 66. http://lazybottom.blogspot.com/2009/06/visualizing-graphrewrite-process-beh… 67. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/visual-graphrewr… 68. http://koweycode.blogspot.com/2009/06/testrunner-for-practical-quickcheck.h… 69. http://www-ps.informatik.uni-kiel.de/~sebf/haskell/explicit-sharing.html 70. http://lhc-compiler.blogspot.com/2009/06/new-backend.html 71. http://playtechs.blogspot.com/2009/06/messing-with-haskell.html 72. http://blog.sigfpe.com/2009/06/hashing-molecules.html 73. http://www.iis.sinica.edu.tw/~scm/2009/longest-segment-satisfying-suffix-an… 74. http://haskellformaths.blogspot.com/2009/06/simple-graphs-with-mathcombinat… 75. http://just-bottom.blogspot.com/2009/06/more-colourful-graphs.html 76. http://www.serpentine.com/blog/2009/06/07/case-conversion-and-text-03/ 77. http://flygdynamikern.blogspot.com/2009/06/announce-numtype-10-type-level-l… 78. http://blog.dinkla.net/?p=15 79. http://www.haskell.org/mailman/listinfo/haskell 80. http://sequence.complete.org/ 81. http://planet.haskell.org/ 82. http://sequence.complete.org/node/feed 83. http://haskell.org/ 84. http://haskell.org/haskellwiki/HWN 85. http://code.haskell.org/~byorgey/code/hwn/

1 0

ANNOUNCE: nntp 0.0.1
by Maciej Piechotka 13 Jun '09

13 Jun '09

Nntp is a library to connect to nntp (i.e. mainly USENET) servers. Currently RFC977 is being implemented. It is published on the LGPL v3 license. Currently implemented: Currently all commands from RFC are implemented. However for user interaction other, more generic interface is provided. Currently tested: Automated testing is not available yet. Tested is only *small* subset of commands and it is at an early stage of development.

2 3

FSTTCS 2009 Call for papers
by Piyush P Kurur 12 Jun '09

12 Jun '09

Hi, The deadline for FST TCS 2009 is nearing (July 7 2009). Please do send your interesting results via easychair http://www.easychair.org/conferences/?conf=fsttcs2009 Details: http://www.fsttcs.org/ Hope to see you in Kanpur Regards ppk

1 0

ANNOUNCE: Galois is hiring functional programmers
by Don Stewart 11 Jun '09

11 Jun '09

Galois is hiring. Bringing together mathematicians, researchers and technologists, Galois, based in Portland, Oregon, was founded in 1999 with the mission to apply functional languages and formal methods to solve real world problems. Today, over 30 members strong, we’re living the vision, designing and developing advanced technologies for safety and security-critical systems, networks, and applications. Galois technical staff members play a pivotal role in developing advanced software technology. Members work on one or more projects, and are expected to perform in a variety of roles based upon their talents and organizational needs. Technical staff may be called upon to write proposals, gather requirements, and work in all stages of the software development process, from requirements gathering to testing and validation. Additional duties may include project management, technology research and development, and technical infrastructure development. We’re looking for people who can invent, learn, think, and inspire. We reward creativity and thrive on collaboration. We offer great benefits and perks, including a 401K plan, stock options, paid vacation, family health plan, flexible work schedule, a casual work environment, snacks, espresso and foosball. Galois technical staff members usually work in a small team setting (2-5 members), and must successfully interact with clients, partners, and other employees in a highly cooperative, collaborative, and intellectually challenging environment. A Masters or Ph.D. degree in Computer Science is desirable but not required. Additionally, a strong programming background and experience with Haskell or other functional programming languages is preferred but not required. Must work well with customers, including building rapport, identifying needs, and communicating with strong written, verbal and presentation skills. Must be highly motivated and able to self-manage to deadlines and quality goals. To learn more about us, visit http://www.galois.com and http://www.galois.com/company/careers The types of technology we use are covered in our blog: http://www.galois.com/blog/ We’d like to hear from you! Send your cover letter and resume to us at jobs2009(a)galois.com.

1 0

pgm-0.1 on Hackage
by Frederick Ross 09 Jun '09

09 Jun '09

pgm is a pure Haskell library to read and write PGM images. Points of note: * Seamlessly handles the divide between 1 and 2 byte per pixel images (this is vital for folks doing microscopy, since otherwise we're stuck in tiff hell). * Returns the images as UArrays; writes from UArrays. * Handles multiple PGMs concatenated one after another in a file, provided they are separated only by (optional) whitespace. * Encodes and decodes all comments in the PGM header, which can be used to drop arbitrary metadata into files in a human readable manner. -- Frederick Ross Doctorant, SV/GHI/UPKIN, EPFL Graduate Fellow, The Rockefeller University

1 0

ANN: iteratee-0.2.1 released
by John Lato 09 Jun '09

09 Jun '09

Hello, I would like to announce the release of iteratee-0.2.1, a major update to the iteratee library. This library provides types and functions for performing enumerator/iteratee based I/O operations in Haskell, as described by Oleg at http://okmij.org/ftp/Streams.html#iteratee. This library is intended to be used for incremental, strict I/O and provides high performance and composability. The 0.2 version is a large redesign from the initial release, with many breaking changes. A major new feature is support for resumable exceptions. The interface has been greatly simplified, including the following: -Iteratees that previously returned a result of "Maybe a" will now usually have a result of "a", making it much simpler to combine multiple iteratees. The "bindm" combinator is no longer necessary. Failed operations should now result in a resumable exception. User-defined iteratees may still have results of "Maybe a" of course. -The types IterateeG and IterateeGM have been unified; IterateeGM is no longer necessary or supplied. -The combinators (>>==) and (==<<) are no longer necessary or supplied; the same functionality is provided by (>>=) and ($). -The new combinator "joinIM" simplifies composing multiple enumerations in certain monadic contexts. -The StreamChunk class now depends upon Monoid and ListLike, and defaults are provided for all functions, simplifying the work necessary to create a new StreamChunk instance (although performance can be greatly improved by providing certain custom implementations). -The library depends upon transformers instead of mtl for monadic composition. I made this change because it looks like mtl will be deprecated from HPC in the near future, however it could be reverted if necessary. The only difference between 0.2 and 0.2.1 is that I removed a section on building the test executable from the .cabal file so that test frameworks wouldn't be required of all users. All necessary files for testing are supplied with 0.2.1, they just have to be built manually. The process of updating earlier code to work with this version can be more-or-less straightforward, depending upon style and the particular functionality accessed. I would be happy to provide assistance if anyone is in this situation. Thanks to the following individuals for contributing code to this release: Oleg Kiselyov Bas van Dijk Paulo Tanimoto Thanks to Johan Tibell for comments and ongoing support. Cheers, John Lato

1 0

purely functional lazy non-deterministic programming
by Sebastian Fischer 08 Jun '09

08 Jun '09

[crosspost from Haskell-libraries and Curry mailing list] Dear Haskell and Curry programmers, there is now a Haskell library that supports lazy functional-logic programming in Haskell. It is available from http://sebfisch.github.com/explicit-sharing and can be obtained from Hackage using cabal-install. The project page links to tutorials that explain how to use the library and to an ICFP'09 paper (joint work with Oleg Kiselyov and Chung-chieh Shan) that explains the implemented ideas in depth. Have fun! Sebastian -- Underestimating the novelty of the future is a time-honored tradition. (D.G.)

1 0