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Jurriën Stutterheim
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Registration is open for DHD >>= UHac!

Join us in Utrecht for some Haskell-y fun.

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Calling all Haskellers!

To open 2012 and in celebration of the group's 3rd year of existence, the Dutch Haskell Users Group is happy to announce a new event that combines an informal conference and a hackathon.
http://www.haskell.org/pipermail/haskell/2012-January/023110.html

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I was playing around with Octopress and figured I might as well write something while I was at it. If you want to find out how you can use digestive-functors together with Heist, read on:

http://norm2782.github.com/blog/2012/01/01/using-digestive-functors-with-heist/

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We are pleased to announce the first release candidate for GHC 7.4.1.


The release notes are not yet available, but here are some of the highlights of the 7.4 branch since 7.2 and 7.0:

There is a new feature Safe Haskell (-XSafe, -XTrustworthy, -XUnsafe): http://www.haskell.org/ghc/dist/stable/docs/html/users_guide/safe-haskell.html - The design has changed since 7.2.

There is a new feature - kind polymorphism (-XPolyKinds): http://www.haskell.org/ghc/dist/stable/docs/html/users_guide/kind-polymorphism-and-promotion.html - A side-effect of this is that, when the extension is not enabled, in certain circumstances kinds are now defaulted to * rather than being inferred.

There is a new feature - constraint kinds (-XConstraintKinds): http://www.haskell.org/ghc/dist/stable/docs/html/users_guide/constraint-kind.html

It is now possible to give any sort of declaration at the ghci prompt: http://www.haskell.org/ghc/dist/stable/docs/html/users_guide/interactive-evaluation.html#ghci-decls - For example, you can now declare datatypes within ghci.

The profiling and hpc implementations have been merged and overhauled. Visible changes include renaming of profiling flags: http://www.haskell.org/ghc/dist/stable/docs/html/users_guide/flag-reference.html#id589412 and the cost-centre stacks have a new semantics, which should in most cases result in more useful and intuitive profiles. The +RTS -xc flag now also gives a stack trace.

It is now possible to write compiler plugins: http://www.haskell.org/ghc/dist/stable/docs/html/users_guide/compiler-plugins.html

DPH support has been significantly improved.

There is now preliminary support for registerised compilation using LLVM on the ARM platform.

Note: The release candidate accidentally includes the random, primitive, vector and dph libraries. The final release will not include them.

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The FP Dag 2012 program has been posted.

Register today!

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Great app. I've been using it for a long time now. It makes using my computer at night much more comfortable.

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Keep a close eye on this project folks: this is what will liberate us from version-range dependencies and the brittleness of the package system, while bringing some other long-sought-after features (parameterised modules, private dependencies, interfaces, recursive modules,...).

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First flying lesson at KLM Aeroclub
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Flying @ KLMAC (16 photos)
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