[Haskell] Haskell Weekly News: Issue 125 - July 12, 2009
Brent Yorgey
byorgey at seas.upenn.edu
Sun Jul 12 12:08:04 EDT 2009
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Haskell Weekly News
http://sequence.complete.org/hwn/20090712
Issue 125 - July 12, 2009
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Welcome to issue 125 of HWN, a newsletter covering developments in the
[1]Haskell community.
Announcements
Announcing the new Haskell Prime process, and Haskell 2010. Simon
Marlow [2]announced the new and improved [3]Haskell Prime process, and
a list of proposals which are currently under consideration to be
accepted into the next (2010) revision of the standard.
AspectAG 0.1.1. Marcos Viera [4]announced the release of [5]AspectAG, a
library of strongly typed Attribute Grammars implemented using
type-level programming.
Colour tutorial. Russell O'Connor [6]announced a [7]tutorial wiki page
for the [8]colour library.
Haskell Hack Day, Edinburgh, 30 August 2009. Eric Kow [9]announced a
[10]Haskell Hack Day to be held in Edinburgh, on Sunday 30 August,
before ICFP. The Hack Day will be held at the ICFP conference venue,
the Royal College of Physicians.
sendfile-0.3. Matthew Elder [11]announced the release of
[12]sendfile-0.3, which includes a more general interface, updated
documentation, and more.
Gtk2hsGenerics. Michael Dever [13]announced the release of
[14]Gtk2hsGenerics, a package which contains utility functions for
extracting from and adding to stores.
darcs 2.3 beta 2. Petr Rockai [15]announced that darcs 2.3 beta 2 is
available for testing. It can be installed using the [16]darcs-beta
package on Hackage (be sure to 'cabal update' first). The new beta
release adds index upgrade functionality to hashed-storage, and now
uses an architecture-independent index format.
hsparql, a SPARQL query generator/DSL and client. Jeff Wheeler
[17]announced the first version of [18]hsparql, which makes it easy to
query SPARQL-compliant servers using a relatively intuitive DSL and
very simple client. SPARQL is a SQL-ish query language for stores of
RDF data.
Hayoo! beta 0.4. Timo B. [19]announced the next beta version 0.4 of
[20]Hayoo!, the Haskell API search engine with find-as-you-type and
suggestions. This release includes some major changes to the web
interface, including the ability to display the full description of a
function, and some example queries featured on the start page, as well
as an updated search index.
texmath 0.1.0.1 - conversion of LaTeX math to MathML. John MacFarlane
[21]announced an early release of [22]texmath, a Haskell library for
converting LaTeX math formulas to MathML. The package includes a
standalone test program, testTeXMathML, and a CGI script, texmath-cgi,
that can be used in web apps. You can see demos of the script [23]here
and [24]here.
BostonHaskell: Next meeting - July 16th at MIT CSAIL Reading Room
(32-G882). Ravi Nanavati [25]announced the July meeting of the
[26]Boston Area Haskell Users' Group, to be held Thursday, July 16th
from 6:30pm - 8:30pm in the MIT CSAIL Reading Room. Scheduled talks
include "An Introduction to GHC Hacking" by Alec Heller, and "Haskell
on the iPhone" by Ryan Trinkle. There are still openings for Lightning
Talks (5-minute talk, 2-minute Q&A). See the announcement for more
details.
AC-Vector, AC-Colour and AC-EasyRaster-GTK. Andrew Coppin [27]announced
the release of three packages: [28]AC-Vector, which provides unboxed
vectors of Doubles with arithmetic, dot product and cross product, and
a few other useful items; [29]AC-Colour, which provides two simple RGB
color types, optimized for simplicity and speed; and
[30]AC-EasyRaster-GTK, a layer over Gtk2hs which provides easy
pixel-twiddling functionality.
Google Summer of Code
Progress updates from participants in the 2008 [31]Google Summer of
Code.
Haddock improvements. Isaac Dupree has had a [32]good deal of success
getting cross-package documentation to work, with a few remaining loose
ends.
space profiling. Gergely Patai's profile graphing application [33]is
now capable of connecting to a profile relay server that can broadcast
the heap profile of its associated process on the fly, so it is now
possible to attach an observer to a program that was started earlier.
He now plans to shift to working on a history manager.
fast darcs. Petr Rockai has produced [34]another darcs 2.3 beta
release, and has done more work on [35]designing an efficient storage
system.
Discussion
Leaner Haskell.org frontpage. haskell [36]proposed a new design for the
haskell.org front page. Bikeshedding ensues, news at 11.
exercise - a completely lazy sorting algorithm. Petr Pudlak [37]asked
whether it is possible to write a lazy sorting algorithm which allows
access to the kth item of the sorted output in linear time, for all k.
An interesting discussion and mind-expanding code followed.
Implementing Las Vegas algorithms in Haskell. Matthias Görgens began a
[38]discussion on implementing Las Vegas algorithms, which use a source
of randomness but have results which are still deterministic. What
should the type of such functions be? Is it OK to use unsafePerformIO
in their definition?
Blog noise
[39]Haskell news from the [40]blogosphere. Blog posts from people new
to the Haskell community are marked with >>>, be sure to welcome them!
* Petr Rockai: [41]Designing Storage for darcs.
* >>> haskelladdict: [42]Having fun sorting with Haskell.
* Jeff Heard: [43]C2HS example: To save other people frustration.
* JP Moresmau: [44]Mazes of Monad: 1.0.5 and (maybe) final version
uploaded.
* Sean Leather: [45]Fun and generic things to do with EMGM at the
London HUG.
* Greg Bacon: [46]Gyrigrams.
* Magnus Therning: [47]Making a choice from a list in Haskell, Vty
(part 2).
* Jeff Heard: [48]A quick buster example.
* Jeff Heard: [49]An ugly force-directed layout implementation.
* Petr Rockai: [50]darcs 2.3 beta 2.
* Isaac Dupree: [51]Cross-package documentation going well!.
* >>> dasuxullebt: [52]I (don't) like Haskell.
* Holumbus: [53]Some Hayoo! Improvements.
* David Amos: [54]Conjugacy classes, part 2.
* Michael Snoyman: [55]hack-handler-webkit.
* Dan Piponi (sigfpe): [56]A Monad for Combinatorial Search with
Heuristics.
* Greg Bacon: [57]A programmable semicolon explained.
* Holumbus: [58]Another Hayoo! Update.
* Gergely Patai: [59]Remote profiling at your fingertips.
* The GHC Team: [60]Visualising the Haskell package dependency graph.
* Bryan O'Sullivan: [61]First steps with Haskell text API
improvement.
* Paul Hudak: [62]Haskell and the Arts.
* >>> John Gunderman: [63]Haskell Cabal in Ubuntu.
* Sebastian Sylvan: [64]Ray tracing signed distance functions.
Quotes of the Week
* SimonPJ: [re: class constraints on data declarations] In GHC's
source code these contexts are consistently called stupid_theta.
* JN: this tutorial just introduced _|_ and called it bottom. I
assume that's because it looks like an ass?
* uman: so you can pass functions around as objects... this sounds
like JavaScript
* Twey: Mr. Wing, sir, if you are listening: you have the I.Q. of a
semolina pudding. And your homepage is full of <font> tags. I'm not
sure which is the greater insult, but at least one is objectively
true.
* jmcarthur: #haskell: Overwhelmingly helpful.
* lilac: class Monad m where / return and Kleisli compose / must form
a monoid <lilac> that's my new monad tutorial haiku <jmcarthur> i
think that is the best monad tutorial i have ever read
* dcoutts: make sure happy is on your path and it'll all be ok
* ski: my answer to that is : don't deduce, denote!
* roco: guys i have problem, does anybody know programming ?
* dhjdhj: All new features added to C++ are intended to fix
previously new features added to C++
About the Haskell Weekly News
New editions are posted to [65]the Haskell mailing list as well as to
[66]the Haskell Sequence and [67]Planet Haskell. [68]RSS is also
available, and headlines appear on [69]haskell.org.
To help create new editions of this newsletter, please see the
information on [70]how to contribute. Send stories to byorgey at cis
dot upenn dot edu. The darcs repository is available at darcs get
[71]http://code.haskell.org/~byorgey/code/hwn/ .
References
1. http://haskell.org/
2. http://www.haskell.org//pipermail/haskell/2009-July/021472.html
3. http://hackage.haskell.org/trac/haskell-prime/wiki/Process
4. http://www.haskell.org//pipermail/haskell/2009-July/021475.html
5. http://hackage.haskell.org/package/AspectAG
6. http://www.haskell.org//pipermail/haskell-cafe/2009-July/064065.html
7. http://www.haskell.org/haskellwiki/Colour
8. http://hackage.haskell.org/package/colour
9. http://article.gmane.org/gmane.comp.lang.haskell.general/17345
10. http://www.haskell.org/haskellwiki/Hac7
11. http://article.gmane.org/gmane.comp.lang.haskell.general/17343
12. http://hackage.haskell.org/package/sendfile
13. http://article.gmane.org/gmane.comp.lang.haskell.general/17336
14. http://hackage.haskell.org/package/Gtk2hsGenerics
15. http://article.gmane.org/gmane.comp.lang.haskell.cafe/61071
16. http://hackage.haskell.org/package/darcs%2Dbeta
17. http://article.gmane.org/gmane.comp.lang.haskell.cafe/61062
18. http://hackage.haskell.org/package/hsparql
19. http://article.gmane.org/gmane.comp.lang.haskell.cafe/61060
20. http://holumbus.fh-wedel.de/hayoo
21. http://article.gmane.org/gmane.comp.lang.haskell.cafe/61049
22. http://hackage.haskell.org/package/texmath
23. http://johnmacfarlane.net/texmath.xhtml
24. http://johnmacfarlane.net/texmath.html
25. http://article.gmane.org/gmane.comp.lang.haskell.cafe/61003
26. http://www.haskell.org/haskellwiki/Boston_Area_Haskell_Users%27_Group
27. http://article.gmane.org/gmane.comp.lang.haskell.cafe/60944
28. http://hackage.haskell.org/package/AC-Vector
29. http://hackage.haskell.org/package/AC-Colour
30. http://hackage.haskell.org/package/AC-EasyRaster-GTK
31. http://hackage.haskell.org/trac/summer-of-code/wiki/SoC2008
32. http://haddock2009.wordpress.com/2009/07/09/cross-package-documentation-going-well/
33. http://just-bottom.blogspot.com/2009/07/remote-profiling-at-your-fingertips.html
34. http://web.mornfall.net/blog/darcs_2.3_beta_2.html
35. http://web.mornfall.net/blog/designing_storage_for_darcs.html
36. http://thread.gmane.org/gmane.comp.lang.haskell.cafe/61082
37. http://thread.gmane.org/gmane.comp.lang.haskell.cafe/60981
38. http://thread.gmane.org/gmane.comp.lang.haskell.cafe/60998
39. http://planet.haskell.org/
40. http://haskell.org/haskellwiki/Blog_articles
41. http://web.mornfall.net/blog/designing_storage_for_darcs.html
42. http://haskelladdict.wordpress.com/2009/07/11/having-fun-sorting-with-haskell/
43. http://vis.renci.org/jeff/2009/07/10/c2hs-example-to-save-other-people-frustration/
44. http://jpmoresmau.blogspot.com/2009/07/mazes-of-monad-105-and-maybe-final.html
45. http://feedproxy.google.com/~r/splonderzoek/~3/qnt94yp_Er4/fun-and-generic-things-to-do-with-emgm.html
46. http://feedproxy.google.com/~r/gbacon/~3/QKPjQ0Fxl_4/gyrigrams.html
47. http://therning.org/magnus/archives/689
48. http://vis.renci.org/jeff/2009/07/09/a-quick-buster-example/
49. http://vis.renci.org/jeff/2009/07/09/an-ugly-force-directed-layout-implementation/
50. http://web.mornfall.net/blog/darcs_2.3_beta_2.html
51. http://haddock2009.wordpress.com/2009/07/09/cross-package-documentation-going-well/
52. http://uxul.wordpress.com/2009/07/09/i-dont-like-haskell/
53. http://holumbus.fh-wedel.de/blog/?p=24
54. http://haskellformaths.blogspot.com/2009/07/conjugacy-classes-part-2.html
55. http://blog.snoyman.com/2009/07/08/hack-handler-webkit/
56. http://blog.sigfpe.com/2009/07/monad-for-combinatorial-search-with.html
57. http://feedproxy.google.com/~r/gbacon/~3/UGYWKr-huLY/programmable-semicolon-explained.html
58. http://holumbus.fh-wedel.de/blog/?p=23
59. http://just-bottom.blogspot.com/2009/07/remote-profiling-at-your-fingertips.html
60. http://ghcmutterings.wordpress.com/2009/07/06/visualising-the-haskell-package-dependency-graph/
61. http://www.serpentine.com/blog/2009/07/06/first-steps-with-haskell-text-api-improvement/
62. http://www.infoq.com/presentations/haskell-arts-paul-hudak
63. http://sporkcode.wordpress.com/2009/07/05/haskell-cabal-in-ubuntu/
64. http://sebastiansylvan.spaces.live.com/blog/cns!4469F26E93033B8C!173.entry
65. http://www.haskell.org/mailman/listinfo/haskell
66. http://sequence.complete.org/
67. http://planet.haskell.org/
68. http://sequence.complete.org/node/feed
69. http://haskell.org/
70. http://haskell.org/haskellwiki/HWN
71. http://code.haskell.org/~byorgey/code/hwn/
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