Haskell Weekly News: April 17, 2009

Submitted by byorgey on Fri, 04/17/2009 - 5:47am.
Haskell Weekly News: April 17, 2009

Welcome to issue 114 of HWN, a newsletter covering developments in the Haskell community.

The 5th Haskell Hackathon is underway in Utrecht! Happy Haskell hacking! An early HWN this week since I will be traveling this weekend (but not, unfortunately, to the Hackathon).


Reminder: Haskell Communities and Activities Report. Janis Voigtlaender reminded everyone that the deadline for the May 2009 edition of the Haskell Communities and Activities Report is only two weeks away. If you haven't already, please write an entry for your new project, or update your old entry.

primes. Sebastian Fischer announced the release of the primes package, which implements lazy wheel sieves for efficient, purely functional generation of prime numbers in Haskell.

level-monad-0.3. Sebastian Fischer announced version 0.3 of the package level-monad, which implements breadth-first search directly as an instance of MonadPlus (without using an intermediate tree representation). Version 0.3 adds a MonadPlus instance for iterative deepening inspired by Michael Spivey's paper on Algebras for combinatorial search.

hgettext 0.1.10. Vasyl Pasternak announced a new release of the hgettext package, which now has bindings to all gettext functions.

Haskell logo in TeX. Philip Hölzenspies announced a version of the new Haskell logo design prepared using TikZ, for inclusion in LaTeX documents.

The Monad.Reader (14) - Call for copy. Wouter Swierstra issued a call for copy for Issue 14 of The Monad.Reader. The deadline for submissions is May 15, 2009. Let Wouter know if you intend to submit something -- the sooner, the better.

time Ashley Yakeley announced the release of time, which should now compile on Windows.


Code Golf. Sebastian Fischer started a lively round of code golf with his code for list diagonalization.

Converting IO [XmlTree] to [XmlTree]. rodrigo.bonifacio asked how to convert an IO [XmlTree] into an [XmlTree], leading to a discussion of Haskell pedagogy.

Blog noise

Haskell news from the blogosphere.

Quotes of the Week

  • Gracenotes: And then the type system goes all crazy and demands that x and 1 are both Word32s!
  • mauke: data What a = No; instance Monad What where { return _ = No; No >>= _ = No }
  • pumpkin: makes the next internet hit video, 2 natural transformations, 1 functor
  • mmorrow: a functor is like an analogy between two analogies
  • FliPPeh: @faq Can Conficker be rewritten in Haskell? <lambdabot> <no location info>: parse error on input `:'
  • HairyDude: The Haskell Type System is a Harsh Mistress.. there ain't no such thing as a free theorem.
  • LeCamarade: Now, let's say the set is {Haskell, SML, Ruby, Tomatoes, Human, Cabbage, Noise, IRC}.
  • Babelfish: And there you travel: a beam tracer! Naturally, there are many things that ought to be amend.

About the Haskell Weekly News

New editions are posted to the Haskell mailing list as well as to the Haskell Sequence and Planet Haskell. RSS is also available, and headlines appear on haskell.org.

To help create new editions of this newsletter, please see the information on how to contribute. Send stories to byorgey at cis dot upenn dot edu. The darcs repository is available at darcs get http://code.haskell.org/~byorgey/code/hwn/ .