[Haskell-cafe] Haskell Weekly News
ky3 at atamo.com
Tue Apr 14 02:02:52 UTC 2015
- Aditya Siram announces the first release of Haskell bindings
to the C++-based FLTK cross-platform GUI library. FLTK
<http://www.fltk.org/> can be used to build a modern
windows-and-widgets-based desktop app and comes with a UI builder called
- The startup called Helium releases a "homegrown Webmachine-inspired
web framework in Haskell."
Airship is very small (just under 1000 LoC) and extremely unopinionated: it
works with any WAI-compatible web server and any templating language
(including none at all!). Reddit discussion.
- Adam Chlipala releases a new Ur/Web library for producing custom
event-planning web apps
quickly. All you need to do is "assemble highly parametrized components."
- Abe Voelker
finds himself wanting algebraic data types and pattern matching when
writing Ruby. He presents an evolution of a file upload validator,
culminating in a finale that uses an Either monad provided by a Ruby gem
- Eitan Chatav shares a correct-by-construction JSON
serializer/deserializer <http://lpaste.net/130064> using lens-json.
- Wouldn't it be neat to get profiling info without stopping the program
and pissing off your users? Mark Wotton
<https://ghc.haskell.org/trac/ghc/ticket/10235> has filed exactly such a
- Is Call Arity optimization to blame for your 7.10 compilation
slowdowns? Joachim Breitner
- Ever felt Haskell on Windows is 2nd class, even though it's Tier-1
according to the Platform? Well, installing hmatrix on Win requires
additional steps, as Redditor wrvn
- Do you program in Haskell using emacs? You must be using haskell-mode
then. Here's monthly news
straight from the haskell-mode development team.
- Dominic Steinitz
raises awareness about the brokenness of System.Random. Solution? Use
tf-random for now.
- Big number exponentiation segfaults, in this reddit discussion.
Turns out it's a bug <https://ghc.haskell.org/trac/ghc/ticket/10282>
involving the GNU Multi-precision Library. Make sure you have the latest
GMP version 6.
- Devan Stormont
creates his first hackage library that obtains weather forecast data via a
web-based API. He writes, "The really brilliant part is in being able to
completely replace a core piece of an app within a single day and having
complete confidence in the result. It’s moments like this that make you
really happy to be working with such a powerful language as Haskell."
reminds us that GADT can always be pattern-matched in a case expression.
"It's let expressions that cause GHC to provide amusing messages about its
- Zohaib Rauf <http://zohaib.me/yet-another-what-is-a-monad-post/>
publishes a monad tutorial. He explains that the 'M' in 'M a' is "some
metadata wrapped around 'a'."
*Tweets of the week:*
- John Carmack:
<https://twitter.com/ID_AA_Carmack/status/585871417855516672> If I had
to write software that my life depended on, I would seriously consider
<https://twitter.com/shanelogsdon/status/586145419639578625> tried the
#haskell web framework http://www.spock.li/ last night with a
meaningless micro benchmark. ~38k req/s is pretty quick
<https://twitter.com/AlexanderKatt/status/583279982186786817> 'it is
entirely unnecessary to understand category theory in order to understand
monads in #haskell' said the guys who know category theory
<https://twitter.com/justusadam_/status/586939066748379136> I'm warming
up to the idea of using #Haskell more. Wonderful language but the syntax
and some of the concepts were difficult to understand
Data Types Considered Harmful: once you use them, every language lacking
them drives you to madness. #LangSec
- chwthewke: <https://twitter.com/chwthewke/status/583385239138996224>
#Haskell is a very hot programming language :) No, really, an hour of it
and my laptop is on the verge of becoming a brown dwarf :D
tries to get banned from #Haskell IRC channel, decides to learn Haskell
<https://twitter.com/stephan_gfx/status/583493468162400256> Cool, cabal
will multithread installation/build if you run it with the -j option. cabal
install -j <package_name>
- Pythux: <https://twitter.com/Pythux/status/583535948408958976> One
thing I learned at Haskell's meetup yesterday: it's possible to create a
start-up with Haskell full stack! #Haskell #Awesome
*Quote of the week:*
- Lisp, Haskell and other FP are currently killing it in the quiet world
of DSLs, especially Mining, Oil & Gas industries which need to parse
petaflops of seismic data and reservoir simulations, need rapid
prototyping, need formally verified drilling platform components that field
engineers can interact with easily, and HPC algorithms for financial
trading. -- Source
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