Editorial = Nothing,

Community [

],

Announce [

Item
"HDBC v2.0 now available"
"John Goerzen"
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51664 announced] that [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/HDBC HDBC v2.0] is now available. Simultaneously, [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/HDBC%2Dsqlite3 HDBC-sqlite3], [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/HDBC%2Dpostgresql HDBC-postgresql], and [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/HDBC%2Dodbc HDBC-odbc v2.0] have also been uploaded to Hackage. A guide to new features and migration can be [http://software.complete.org/software/wiki/hdbc/NewIn20 found here].",

Item
"Extensible and Modular Generics for the Masses: emgm-0.2"
"Sean Leather"
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51646 announced] the second major release of [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/emgm Extensible and Modular Generics for the Masses (EMGM)], a library for generic programming in Haskell using type classes and a sum-of-products view. Improvements over emgm-0.1 include type representation derivation using Template Haskell, documentation improvements, a bimap function, and more.",

Item
"incremental-sat-solver"
"Sebastian Fischer"
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51564 announced] the [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/incremental-sat-solver incremental-sat-solver] library, which provides an implementation of the [http://en.wikipedia.org/wiki/DPLL_algorithm Davis-Putnam-Logemann-Loveland algorithm] for the Boolean satisfiability problem. It not only allows solving Boolean formulas in one go, but also adding constraints and query bindings of variables incrementally.",

Item
"data-spacepart - space partitioning data structure[s] (initial release)"
"Corey O'Connor"
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51505 announced] the [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/data-spacepart data-spacepart] package, the goal of which is to be a collection of space partitioning data structures. Currently, there is only a simple quadtree implementation.",

Item
"Wired 0.2"
"Emil Axelsson"
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51484 announced] a new release of [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/Wired Wired]. The most important news in this release is that it now contains a 45nm cell library, which means that you can use Wired to create and analyze modern VLSI designs today!",

Item
"CFP Haskell Symposium 2009"
"Stephanie Weirich"
"[http://article.gmane.org/gmane.comp.lang.haskell.general/16818 announced] a call for papers for the [http://haskell.org/haskell-symposium/2009/ 2009 Haskell Symposium] in Edinburgh, Scotland. The deadline for submissions is May 8.",

Item
"testpack (first release)"
"John Goerzen"
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51482 announced] the release of [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/testpack testpack], a collection of a few utilities for tests: some tools to convert QuickCheck properties into HUnit test cases, and various shortcuts and tools to increase verbosity while running tests in both QuickCheck and HUnit.",

Item
"convertible (first release)"
"John Goerzen"
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51481 announced] a new package, [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/convertible convertible]. At its heart, it's a very simple typeclass that's designed to enable a reasonable default conversion between two different types without having to remember a bunch of functions. The return type from this conversion is \"Either ConvertError a\", and conversions are expected to do sanity checking (such as bounds checking when converting to types like Int), so as to produce neither garbage nor exceptions as part of the conversion process. The package also includes instances of the Convertible typeclass for common type conversions. working with numeric types as well as dates and times. Notably, it has code to convert between System.Time types and their Data.Time siblings, and vice versa, a capability I found annoyingly lacking in the standard library.",

Item
"Progress with IDE"
"Juergen Nicklisch-Franken"
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51475 announced] that the [http://www.leksah.org Leksah] 0.4.0 pre-release is now available. Current features include a Haskell customized editor with candy, project management support based on Cabal, a visual editor for Cabal files, navigation aids, a module browser, session support, and more.",

Item
"Hayoo! beta 0.3"
"Timo B."
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51450 announced] the next beta version 0.3 of [http://holumbus.fh-wedel.de/hayoo Hayoo!], the Haskell API search engine with find-as-you-type and suggestions. Hayoo! now works even if your browser does not support JavaScript.",

Item
"DecisionTree 0.0"
"Adrian Neumann"
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51407 announced] the [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/DecisionTree DecisionTree] package, which provides an implementation of the ID3 algorithm and can be used to classify data with discrete valued attributes.",

Item
"orchid-0.0.7"
"Sebastiaan Visser"
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51395 announced] a new release of [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/orchid Orchid], just another Haskell Wiki. This release features a number of improvements, including a [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/filestore filestore] backend, searching, deleting and renaming support, and more. Check out the [http://funct.org/wiki/ demo].",

Item
"gitit 0.5"
"John MacFarlane"
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51392 announced] the latest release of [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/gitit Gitit], the multitalented distributed wiki written in Haskell. This release uses the [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/filestore filestore] library and hence also supports a darcs backend, and also features optimizations, better search, better diffs, and more. You can check out a [http://gitit.johnmacfarlane.net/ running example].",

Item
"filestore 0.1"
"Gwern Branwen"
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51388 announced] [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/filestore filestore 0.1], which provides a uniform, abstract, generic interface for storing versioned files on disk. It allows calling programs to use generic commands to store strings or binary data and perform various queries, such as 'what files are in this repository?' or 'what were the contents of this file at revision XXXXXXX?' or 'give me a diff of this file between revision XXXXXXX and revision YYYYYYY.' Because the interface is abstract, the calling program is insulated from the messy details of the backend (which might be a VCS or a database). Darcs and Git are fully supported. There are plans for a SQLite backend.",

Item
"Scurry :: A cross platform (if you put your mind to it) P2P VPN"
"John Van Enk"
"[http://article.gmane.org/gmane.comp.lang.haskell.cafe/51364 announced] the release of [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/Scurry Scurry], a P2P VPN application written in Haskell (and a little C)."

],

HaskellPrime [

],

Libraries [

],

Conferences 
Nothing
[ 

],

Discussion [


Item
"Why binding to existing widget toolkits doesn't make any sense"
"Achim Schneider"
"began an interesting [http://thread.gmane.org/gmane.comp.lang.haskell.cafe/51478 discussion] on the proper approach to GUI toolkits in Haskell.",

Item
"Laws and partial values"
"Henning Thielemann"
"began [http://thread.gmane.org/gmane.comp.lang.haskell.cafe/51299 a long thread] on the semantics of laws (such as the monoid laws)."

],

Jobs [

],

Blogs   [

Post
"2009-01-31"
"Sebastian Fischer"
"Using SmallCheck to Shatter an Audacious Claim"
""
"http://www-ps.informatik.uni-kiel.de/~sebf/haskell/smallcheck-experience.html"
N,

Post
"2009-01-31"
"Xmonad"
"Quad head xmonad"
""
"http://xmonad.wordpress.com/2009/01/31/quad-head-xmonad/"
N,

Post
"2009-01-31"
"Darcs"
"darcs weekly news #15"
""
"http://blog.darcs.net/2009/01/darcs-weekly-news-15.html"
N,

Post
"2009-01-30"
"Osfameron"
"More longest paths, and sick folds."
""
"http://greenokapi.net/blog/2009/01/31/more-longest-paths-and-sick-folds/"
N,

Post
"2009-01-30"
"Eric Kow (kowey)"
"haskell-ji"
""
"http://koweycode.blogspot.com/2009/01/haskell-ji.html"
N,

Post
"2009-01-29"
"Jeff Heard"
"Control.Monad.IfElse"
""
"http://vis.renci.org/jeff/?p=96"
N,

Post
"2009-01-28"
"Conal Elliott"
"What is automatic differentiation, and why does it work?"
""
"http://conal.net/blog/posts/what-is-automatic-differentiation-and-why-does-it-work/"
N,

Post
"2009-01-28"
"Luke Palmer"
"Fun with PiSigma"
""
"http://lukepalmer.wordpress.com/2009/01/28/fun-wth/"
N,

Post
"2009-01-27"
"Neil Mitchell"
"Small scripts with Haskell"
""
"http://neilmitchell.blogspot.com/2009/01/small-scripts-with-haskell.html"
N,

Post
"2009-01-27"
"LHC Team"
"Release notes."
""
"http://lhc-compiler.blogspot.com/2009/01/release-notes.html"
N,

Post
"2009-01-27"
"LHC Team"
"Thoughts on a new code generator"
""
"http://lhc-compiler.blogspot.com/2009/01/thoughts-on-new-code-generator.html"
N,

Post
"2009-01-27"
"Xmonad"
"contribs review: ThreeColumnsMiddle, CenteredMaster, Mosaic"
""
"http://xmonad.wordpress.com/2009/01/27/contribs-review-threecolumnsmiddle-centeredmaster-mosaic/"
N,

Post
"2009-01-27"
"Osfameron"
"There's the nub (snippet in Perl and Haskell)"
""
"http://greenokapi.net/blog/2009/01/27/theres-the-nub-snippet-in-perl-and-haskell/"
N,

Post
"2009-01-26"
"Malcolm Wallace"
"codec implementations"
""
"http://feeds.feedburner.com/~r/malcolm/~3/523603226/codec-implementations.html"
N,

Post
"2009-01-26"
"Sebastian Fischer"
"Fun with Infinite Global Constants"
"Just-in-time, memoized binomial coefficients."
"http://www-ps.informatik.uni-kiel.de/~sebf/haskell/infinite-constants.html"
N,

Post
"2009-01-26"
"Chris Done"
"Some libgd changes"
""
"http://chrisdone.com/blog/2009/01/26/Some-libgd-changes"
N,

Post
"2009-01-25"
"Luke Palmer"
"A world without orphans"
"Luke muses on the benefits to be gained by outlawing orphan instances."
"http://lukepalmer.wordpress.com/2009/01/25/a-world-without-orphans/"
N,

Post
"2009-01-25"
"Creighton Hogg"
"Fear of releasing code"
""
"http://abstractabsurd.blogspot.com/2009/01/fear-of-releasing-code.html"
N,

Post
"2009-01-25"
"LHC Team"
"Thoughts on a new code generator"
""
"http://lhc-compiler.blogspot.com/2009/01/thoughts-on-new-code-generator.html"
N,

Post
"2009-01-25"
"Don Stewart (dons)"
"What is Haskell good for?"
"Lots of things, if this tag cloud has anything to say about it."
"http://donsbot.wordpress.com/2009/01/24/what-is-haskell-good-for/"
N,

Post
"2009-01-25"
"Arch Haskell News"
"Haskell wiki stack in Arch"
""
"http://archhaskell.wordpress.com/2009/01/25/haskell-wiki-stack-in-arch/"
N,

Post
"2009-01-25"
"Conal Elliott"
"Comparing formulations of higher-dimensional, higher-order derivatives"
""
"http://conal.net/blog/posts/comparing-formulations-of-higher-dimensional-higher-order-derivatives/"
N,

Post
"2009-01-25"
"Conal Elliott"
"Fostering creativity by relinquishing the obvious"
""
"http://conal.net/blog/posts/fostering-creativity-by-relinquishing-the-obvious/"
N,

Post
"2009-01-24"
"Arch Haskell News"
"Arch Haskell News: Jan 11 2009"
""
"http://archhaskell.wordpress.com/2009/01/11/arch-haskell-news-jan-11-2009/"
N,

Post
"2009-01-24"
"Dan Piponi (sigfpe)"
"Fast incremental regular expression matching with monoids"
"A very cool article showing how to use fingertrees storing memoized automaton transition functions to do fast incremental regular expression matching (or, in general, fast incremental lexing)."
"http://sigfpe.blogspot.com/2009/01/fast-incremental-regular-expression.html"
N

],

Quotes  [

Quote
"lilac"
"is happpy with his infinite type. it's ducks all the way across and down.",

Quote
"Gracenotes"
"You are likely to be eaten by a poset",

Quote
"RossMellgren"
"Apparently 64-bit GHC is sufficiently advanced to be indistinguishable from magic.",

Quote
"cjb"
"It's all fun and games until somebody loses an IOVar.",

Quote
"sigfpe"
"If I took some Ritalin, maybe I could write an entire book on Haskell and algebra.",

Quote
"ddarius"
"Nothing is evaluated until it is."

],

Commits [

]

-- vim: paste