[Haskell] Haskell Weekly News: Issue 89 - October 18, 2008
Brent Yorgey
byorgey at seas.upenn.edu
Sat Oct 18 10:51:32 EDT 2008
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Haskell Weekly News
http://sequence.complete.org/hwn/20081018
Issue 89 - October 18, 2008
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Welcome to issue 89 of HWN, a newsletter covering developments in the
[1]Haskell community.
Announcements
New Haskell tutorial. Miran Lipovaca (BONUS) has written a new and most
excellent Haskell tutorial, [2]"Learn You a Haskell For Great Good!".
Glob 0.1, globbing library. Matti Niemenmaa [3]announced the release of
[4]Glob 0.1, a [5]small library for glob-matching purposes based on a
subset of zsh's syntax.
hledger 0.1, command-line accounting tool. Simon Michael [6]announced
the [7]first release of [8]hledger, a command-line accounting tool
similar to John Wiegley's c++ ledger. hledger generates simple
ledger-compatible transaction and account balance reports from a plain
text ledger file.
[ANN] Haskell Cheatsheet v1.0. Justin Bailey [9]announced a [10]"cheat
sheet" for Haskell, a PDF that tries to summarize Haskell 98's syntax,
keywords and other language elements.
Salsa: A .NET Bridge for Haskell. Andrew Appleyard [11]announced the
[12]first release of [13]Salsa, an experimental Haskell library that
allows Haskell programs to access .NET libraries. Salsa operates by
loading the .NET runtime into your Haskell process and using the FFI
(and run-time code generation) to marshall calls between the .NET and
Haskell runtimes. It includes a code generator and a type-level library
(which uses type families) to provide type-safe access to .NET
libraries in Haskell with C#-style method overload resolution and
implicit conversions.
maccatcher-1.0.0. Jason Dusek [14]announced the [15]maccatcher package,
which obtains a MAC address on *NIX and Windows.
Call for Contributions - Haskell Communities and Activities Report,
November 2008 edition. Janis Voigtlaender sent out [16]call for
contributions to the 15th edition of the [17]Haskell Communities &
Activities Report. The submission deadline is 31 October 2008. If you
are working on any project that is in some way related to Haskell,
please write a short entry and submit it. Even if the project is very
small or unfinished or you think it is not important enough -- please
reconsider and submit an entry anyway!
Data.IVar 0.1. Luke Palmer [18]announced the release of the
[19]Data.IVar module, which provides write-once variables that can be
blocked on in parallel. Unlike other implementations, Data.IVar does
not use thread racing, since empirical tests have shown that the GHC
scheduler is not quite good enough to handle thread-racing efficiently.
A wiki page for managing the 6.10 handover. Don Stewart [20]announced a
[21]wiki page to help with the transition to GHC 6.10. It collects the
7 or so known issues that break code with GHC 6.10. Please feel free to
clean up, and especially add techniques for handling each change.
GHC 6.10.1 RC 1. Ian Lynagh [22]announced [23]GHC 6.10.0.20081007, the
first release candidate for GHC 6.10.1. There is also a [24]status page
for GHC 6.10.1.
Graphalyze-0.4 and SourceGraph-0.2. Ivan Lazar Miljenovic [25]announced
the release of version 0.4 of the [26]Graphalyze library and version
0.2 of the [27]SourceGraph programme. SourceGraph is a programme
designed to help you analyse the static complexity of your Haskell code
when represented as a graph. These releases fix the bugs reported by
Gwern Branwen, Magnus Therning, and Christopher Hinson.
ListZipper-1.1.0.0. Ryan Ingram [28]announced the release of a simple
list zipper library to Hackage, [29]ListZipper-1.1.0.0.
darcs 2.1.0. Eric Kow [30]announced the release of [31]darcs 2.1.0.
This version provides over 20 bug fixes and 7 new features since darcs
2.0.2. Most notably, the darcs-2 repository format is now the default,
there is better HTTP support, and a longstanding 'pending patch'
regression has been fixed.
Yi 0.5.0.1. Jean-Phillipe Bernardy [32]announced the [33]0.5 release of
Yi, a text editor written and extensible in Haskell. The long-term goal
of the Yi project is to provide the editor of choice for Haskell
programmers.
Discussion
OT: Haskell desktop wallpaper?. Magnus Therning [34]asked for
Haskell-themed desktop wallpapers, and the community responded with
quite a few nice images.
Abusing quickcheck to check existential properties. Norman Ramsey
[35]asked about using QuickCheck to check existential properties;
suggestions involved SmallCheck and skolemization.
Repair to floating point enumerations?. Malcolm Wallace began a
[36]discussion on the merits of changing the (admittedly wonky) H98
[37]semantics for the Enum instances of Float and Double in Haskell
Prime.
A general question about the use of classes in defining interfaces. S.
Doaitse Swierstra [38]asked about the feasibility of including
top-level functions implemented using Applicative combinators as class
methods with default implementations, to allow for the possibility of
giving them more efficient implementations in specific instances.
Proposal #2659: Add sortOn and friends to Data.List. Twan van Laarhoven
[39]proposed adding sortOn (:: Ord b => (a -> b) -> [40]-> [a) and
related functions to Data.List.
Blog noise
[41]Haskell news from the [42]blogosphere.
* Andy Gill: [43]Pretty Printing Code with Markup. writes about a
[44]new version of the HughesPJ pretty printing library which
allows for pretty-printing with markup.
* "FP Lunch": [45]Is purity inefficient?. Are idiomatic pure
functional programs less efficient than idiomatic impure ones?
* Eric Kow (kowey): [46]darcs weekly news #8.
* Conal Elliott: [47]Composing memo tries.
* Conal Elliott: [48]Elegant memoization with functional memo tries.
* >>> Paolo Capriotti: [49]Monads for Markov chains.
* Real-World Haskell: [50]Production status update: we're in QC1.
* Joachim Breitner: [51]Infinite loops in Haskell.
* Luke Palmer: [52]FRP Rant.
* Luke Palmer: [53]data-memocombinators.
* Bryan O'Sullivan: [54]Using Bloom filters for large scale gene
sequence analysis in Haskell. Bryan and Ketil Malde's paper was
accepted to PADL 09!
* Arnar Birgisson: [55]Generating legal subsets of a dependency
graph.
* Creighton Hogg: [56]A silly example and a brief history.
* >>> Robert Ottaway: [57]Sorting using Haskell.
* Dan Piponi (sigfpe): [58]Untangling with Continued Fractions: part
5.
* Holumbus: [59]Source Links Are Back!.
* London Haskell Users Group: [60]Getting things going again.
* >>> Justin Bailey: [61]The Haskell Cheatsheet.
* >>> Nathan Sanders: [62]Type-directed programming.
* >>> Micah Cowan: [63]Adventures in Haskell, Part 2: Kewlness.
* Manuel M T Chakravarty: [64]GpuGen: Bringing the Power of GPUs to
Haskell..
* >>> Binu Raghavan: [65]Haskell.... Binu is trying to learn Haskell.
* Bjoern Edstroem: [66]Let's build an MP3-decoder!.
Quotes of the Week
* mckinna: you don't need to produce elements of an *arbitrary*
whatever-it-is when you can produce elements of the *initial*
whatever-it-is
* tristes_tigres: thinks that programming languages can be divided
into two broad classes: functional and dysfunctional
* luqui: Down with the IO bourgeoisie! Long live the purely
functional proletariat
* ystael: it seems like every time i switch channels over to #haskell
someone is talking about launching missiles. one might be inclined
to draw freudian conclusions.
About the Haskell Weekly News
New editions are posted to [67]the Haskell mailing list as well as to
[68]the Haskell Sequence and [69]Planet Haskell. [70]RSS is also
available, and headlines appear on [71]haskell.org.
To help create new editions of this newsletter, please see the
information on [72]how to contribute. Send stories to byorgey at cis
dot upenn dot edu. The darcs repository is available at darcs get
[73]http://code.haskell.org/~byorgey/code/hwn/ .
References
1. http://haskell.org/
2. http://learnyouahaskell.com/
3. http://article.gmane.org/gmane.comp.lang.haskell.cafe/46583
4. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/Glob
5. http://iki.fi/matti.niemenmaa/glob/index.html
6. http://article.gmane.org/gmane.comp.lang.haskell.cafe/46461
7. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/hledger
8. http://joyful.com/Ledger#hledger
9. http://article.gmane.org/gmane.comp.lang.haskell.cafe/46122
10. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/CheatSheet
11. http://article.gmane.org/gmane.comp.lang.haskell.cafe/46076
12. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/Salsa
13. http://haskell.org/haskellwiki/Salsa
14. http://article.gmane.org/gmane.comp.lang.haskell.cafe/46072
15. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/maccatcher
16. http://article.gmane.org/gmane.comp.lang.haskell.cafe/45967
17. http://www.haskell.org/communities/
18. http://article.gmane.org/gmane.comp.lang.haskell.cafe/45953
19. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/data-ivar
20. http://article.gmane.org/gmane.comp.lang.haskell.glasgow.user/15442
21. http://haskell.org/haskellwiki/Upgrading_packages#Typical_breakages_with_GHC_6.10
22. http://article.gmane.org/gmane.comp.lang.haskell.glasgow.user/15376
23. http://www.haskell.org/ghc/dist/stable/dist/6.10.1-rc-1/rc.html
24. http://hackage.haskell.org/trac/ghc/wiki/GHC-6.10.1
25. http://article.gmane.org/gmane.comp.lang.haskell.general/16473
26. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/Graphalyze
27. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/SourceGraph
28. http://article.gmane.org/gmane.comp.lang.haskell.general/16468
29. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/ListZipper
30. http://article.gmane.org/gmane.comp.lang.haskell.general/16465
31. http://darcs.net/darcs-2.1.0.tar.gz
32. http://www.haskell.org//pipermail/haskell/2008-October/020648.html
33. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/yi
34. http://thread.gmane.org/gmane.comp.lang.haskell.cafe/45961
35. http://thread.gmane.org/gmane.comp.lang.haskell.general/16477
36. http://thread.gmane.org/gmane.comp.lang.haskell.prime/2678
37. http://haskell.org/onlinereport/basic.html#sect6.3.4
38. http://thread.gmane.org/gmane.comp.lang.haskell.libraries/10206
39. http://thread.gmane.org/gmane.comp.lang.haskell.libraries/10184
40. file://localhost/home/brent/haskell/hwn/a]
41. http://planet.haskell.org/
42. http://haskell.org/haskellwiki/Blog_articles
43. http://blog.unsafeperformio.com/?p=31
44. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/marked%2Dpretty
45. http://sneezy.cs.nott.ac.uk/fplunch/weblog/?p=113
46. http://koweycode.blogspot.com/2008/10/darcs-weekly-news-8.html
47. http://feeds.feedburner.com/~r/conal/~3/422189172/
48. http://feeds.feedburner.com/~r/conal/~3/422171822/
49. http://pcapriotti.wordpress.com/2008/10/16/monads-for-markov-chains/
50. http://www.realworldhaskell.org/blog/2008/10/15/production-status-update-were-in-qc1/
51. https://www.joachim-breitner.de/blog/archives/308-Infinite-loops-in-Haskell.html
52. http://luqui.org/blog/archives/2008/10/15/frp-rant/
53. http://luqui.org/blog/archives/2008/10/14/data-memocombinators/
54. http://www.serpentine.com/blog/2008/09/28/using-bloom-filters-for-large-scale-gene-sequence-analysis-in-haskell/
55. http://www.hvergi.net/2008/10/generating-legal-subsets-of-a-dependency-graph/
56. http://abstractabsurd.blogspot.com/2008/10/silly-example-and-brief-history.html
57. http://tech-nickel.blogspot.com/2008/10/sorting-using-haskell.html
58. http://sigfpe.blogspot.com/2008/10/untangling-with-continued-fractions.html
59. http://holumbus.fh-wedel.de/blog/?p=15
60. http://www.londonhug.net/2008/10/11/getting-things-going-again/
61. http://blog.codeslower.com/2008/10/The-Haskell-Cheatsheet
62. http://sandersn.com/blog/index.php?title=type_directed_programming
63. http://micah.cowan.name/2008/10/10/computers/software-development/adventures-in-haskell-part-2-kewlness/
64. http://justtesting.org/post/53418059
65. http://variably-volatile.blogspot.com/2008/10/haskell.html
66. http://blog.bjrn.se/2008/10/lets-build-mp3-decoder.html
67. http://www.haskell.org/mailman/listinfo/haskell
68. http://sequence.complete.org/
69. http://planet.haskell.org/
70. http://sequence.complete.org/node/feed
71. http://haskell.org/
72. http://haskell.org/haskellwiki/HWN
73. http://code.haskell.org/~byorgey/code/hwn/
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