[Haskell] Haskell Weekly News: Issue 98 - December 25, 2008
byorgey at seas.upenn.edu
Thu Dec 25 13:26:56 EST 2008
Haskell Weekly News
Issue 98 - December 25, 2008
Welcome to issue 98 of HWN, a newsletter covering developments in the
Happy holidays! An exciting HWN for you this week, including a number
of cool new libraries, the public release of Cryptol, a
Haskell logo contest, and the second most awesome GHC bug ever
(see augustss's quote at the end of the Quotes section for the most
awesome GHC bug ever).
Hieroglyph 0.85. Jeff Heard announced that the Thingie library has
been renamed Hieroglyph, and now has support for displaying images
on the Cairo canvas.
Cryptol now freely available. Don Stewart announced that Cryptol,
the language of cryptography, is now available to the public!
Cryptol is a domain specific language for the design, implementation
and verification of cryptographic algorithms, developed over the past
decade by Galois for the United States National Security Agency. It has
been used successfully in a number of projects, and is also in use at
Rockwell Collins, Inc. Cryptol is implemented in Haskell.
Control.Monad.IfElse. Jeff Heard announced the
Control.Monad.IfElse module, which provides useful anaphoric and
monadic versions of if-else and when.
llvm-0.4.0.1. Lennart Augustsson announced version 0.4.0.1 of the
release that is quite incompatible with the old 0.0.2 release.)
Haskell LLVM bindings. LLVM is a virtual machine and the bindings allow
you to generate code for this virtual machine. This code can then be
executed by a JIT or written to a file for further processing by the
bytestring-trie 0.1.0. wren ng thornton announced the release of
bytestring-trie 0.1.0, an efficient finite map from (byte)strings
to values. The implementation is based on big-endian patricia trees,
RWH book club. Don Stewart announced that Matt Podwysocki has set
up a Real World Haskell book club, a mailing list on google groups
with already some 200 members discussing typical new user Haskell
questions. Feel free to join if you like talking about Haskell, or
teaching new users.
Thingie-0.80. Jeff Heard announced the release of Thingie, a
library for creating 2D visualizations in a purely functional manner.
It supports static visualizations and animation, and like most vis
libraries, can probably do games as well as simple viz graphics.
typehash version 1.3. Lennart Augustsson announced the release of
the typehash library, which allows you to produce a unique
identifier (a cryptographic hash) for a type. This is useful if you
save values of some type to a file (text, binary, whatever format you
wish) and then when you read it back in again you want to verify that
the type you want to read is the one you actually wrote. The library
also supports type codes, which encode the complete structure of a type
and can be used for finer comparison than just equality.
uvector-algorithms 0.1. Dan Doel announced the release of
uvector-algorithms, a library of algorithms (mostly sorting) for
the mutable arrays defined in uvector. It has several varieties of
sorting, including introsort (quicksort which falls back on heapsort in
bad cases), heapsort, a simple top- down merge sort and a radix sort.
Also exposed are the operations that allow you to use the arrays as
heaps and a combinator for safely using these mutable array algorithms
to sort immutable arrays. All algorithms have been painstakingly
profiled and optimized.
Data.List.Split. Brent Yorgey announced the release of
Data.List.Split, which provides a wide range of strategies and a
unified combinator framework for splitting lists with respect to some
sort of delimiter.
Hoogle with more libraries. Neil Mitchell announced that Hoogle
will now search lots of the libraries present on hackage!
HLint 1.0. Neil Mitchell announced the re-release of HLint, a
tool for making suggestions to improve your Haskell code. Previously
this tool was called Dr Haskell and depended on a working installation
of Yhc; now it depends on GHC 6.10.1.
rangemin-1.0. Louis Wasserman announced the release of
rangemin, a library for efficiently preprocessing an array to find
minimum elements of subranges of the array in constant time.
length of module name affecting performance??. Daniel Gorin
reported a GHC bug where in certain cases, changing the name of a
module to something longer results in a 2x-3x performance hit! Strange
Time for a new logo?. Don Stewart proposed a competition to produce
a new Haskell logo! Submissions should go on the wiki page; the
deadline for logo submissions is December 31.
Pattern combinators. Andrew Wagner started a thread turning a
paper on pattern-matching in Haskell into actual code for hackage.
Coroutines. Ryan Ingram posted some interesting code showing how to
implement coroutines with session types.
Type wildcards. Eyal Lotem proposed a 'type wildcards' extension to
Haskell news from the blogosphere.
* Galois, Inc: Cryptol, the language of cryptography, now
* Dan Piponi (sigfpe): The Mother of all Monads.
* Real-World Haskell: Pat Eyler Interviews the Real World Haskell
* Philip Wadler: Unsafe.
* Conrad Parker: Release: HOgg 0.4.1.
* ezekiel smithburg: fast string appending/concatenation in
* Brent Yorgey: Data.List.Split.
* Alson Kemp: Turbinado: Implementing a poor-man's wiki.
* Luke Palmer: Reactive spaces.
* Conal Elliott: Smarter termination for thread racing.
* Real-World Haskell: RWH on Twitter.
* >>> Muharem Hrnjadovic: My new favourite book.
* Alson Kemp: Turbinado update.
* Philip Wadler: Type Safe Pattern Combinators, by Morten Rhiger.
* Osfameron: Crossword puzzles in Haskell.
* Brent Yorgey: QuickCheck rocks my socks.
* >>> Matt Youell: If programming languages were martial arts.
* >>> Sebastian Fischer: Haskell idioms I did not understand
before hacking them on my own.
* Alson Kemp: Thinking about Haskell: You Know Lazy Evaluation;
You Just Don't Know It.
* >>> Brian McCallister: Real World Haskell, for Jon.
* Ivan Lazar Miljenovic: RWH Arrives Down Under!.
* >>> Thomas ten Cate: XMonad with Ubuntu, dvorak, Pidgin and
* >>> Jeremy Frens: PE Problem #3 in All Languages.
* Jeremy Shaw: Data Migration with HApps-Data.
* Chris Done: Haskell Formlets: Composable web form construction
* Real World Haskell: Haskell around the world.
* Dougal Stanton: A brief look at fingertrees.
Quotes of the Week
* luqui: no!!! I was building a joke, but then I sent it before I
thought of one.
* roconnor: We put up a clothes line and made a turing machine by
hand at a party once ... that is the sort of parties I go to.
* cjs: In what other language could I have learned so much about
Win32 programming (summary: basically, the Windows 3.0 API but with
all sorts of hacks to deal with having more than one thread in the
system), and come out having *enjoyed* myself? Praise to the Lord!
* PaulJohnson: A paradox of the Haskell world is that, while the
language is Vulcan, the community around it is dominated by Warm
Fuzziness. Clearly the two are not mutually exclusive.
* Botje: Caleskell even has unsafeSolveHaltingProblem?
* Taejo: * Taejo needs to write Sitar Hero in Yampa
* dons: it is safer for incompetent people to be working in Haskell
* mpeter: the quality of my code increased drastically when i
realized i should stop telling the computer to do things which were
* byorgey: <Cale> RandomT/Random are effectively state monads. (in
fact, they're thin candy shells around StateT/State.) <byorgey>
"newtype: melts in the compiler, not in your hands"
* quicksilver: [on classes having the same name as constructs in
other languages] it's like having a laxative called "after dinner
mint", and people being upset when they were looking for something
nice to eat after dinner.
* quicksilver: #haskell is a loquacracy!
* quicksilver: It's also the same thing as the Yoneda lemma. That's
the thing about maths. Everything is actually the same.
* hugo: i feel like i was drugged with imperative programming, and
now im in rehab.
* chrisdone: yo dawg we heard you like haskell so we installed a
lambdabot in your ghci so you can monad while you monad
* augustss: ghc had a bug once where it deleted the source file if it
had a type error. Quite sensible, I think.
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