Hi,
When I wanted to get the newest xmonad code from darcs today¹ it was
really, really slow. Running “host” revealed that code.haskell.org is
an alias for community.haskell.org and that it has an IPv6 address
associated with it. Being on an IPv6 network, and having been burnt by
similar
The Tagless final approach can do context-sensitive evaluation, using
the well-known trick from the denotational semantics that explicating
the context turns context-sensitive semantics to compositional. The
trick isn't out of place given how much tagless-final approach is
related to denotational
Am 08.03.2011 13:50, schrieb Christian Maeder:
Am 08.03.2011 13:35, schrieb Hauschild, Klaus (EXT):
Hi Christian,
Thank you for your help. Now the current version of Parse.hs
(http://code.google.com/p/hgmltracer/source/browse/trunk/hGmlTracer/src/Gml/Parse.hs)
works well for the test file
Am 09.03.2011 14:44, schrieb Christian Maeder:
Am 08.03.2011 13:50, schrieb Christian Maeder:
Am 08.03.2011 13:35, schrieb Hauschild, Klaus (EXT):
Hi Christian,
Thank you for your help. Now the current version of Parse.hs
code.haskell.org is the release repo
code.galois.com is current development repo
- Mark
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Friends
I'm giving a talk at a developer conference in London on Friday 18th, about
parallel programming in Haskell.
http://skillsmatter.com/event/scala/functionalpx-2011/ad-1382
I know that some of you have been using Haskell for parallel or concurrent
programming quite a bit, so this
On Tue, Mar 08, 2011 at 01:01:58PM +0100, Gábor Lehel wrote:
On Sun, Mar 6, 2011 at 2:38 PM, Remi Turk rt...@science.uva.nl wrote:
Where?
Hackage: http://hackage.haskell.org/package/cinvoke
Cheers, Remi
[1] http://www.nongnu.org/cinvoke/
Is there any information on how this (and
On Wed, Mar 9, 2011 at 5:26 PM, Remi Turk rt...@science.uva.nl wrote:
On Tue, Mar 08, 2011 at 01:01:58PM +0100, Gábor Lehel wrote:
On Sun, Mar 6, 2011 at 2:38 PM, Remi Turk rt...@science.uva.nl wrote:
Where?
Hackage: http://hackage.haskell.org/package/cinvoke
Cheers, Remi
[1]
On 9 March 2011 17:18, Simon Peyton-Jones simo...@microsoft.com wrote:
I can't say a lot about any one example, obviously, but what would be great
would be
- an idea of how Haskell helped (esp if you have a head to head
comparison)
- code snippets that illustrate how lovely it
Also, due to reformatting code.haskell.org, the accounts were disabled
for a while.
On Wed, Mar 9, 2011 at 6:24 AM, Mark Lentczner mark.lentcz...@gmail.com wrote:
code.haskell.org is the release repo
code.galois.com is current development repo
- Mark
A couple of years ago, Lambda Lounge [1] a local group of language
enthusiasts had a shootout [2] where you were supposed to implement a
simple vending machine [3] that took coins and dispensed candy.
With *very* little experience using Haskell I was able to implement a
vending machine server [4]
Hello,
I am trying to make a monad that uses ST internally.
But even when reducing this to the simplest case I'm still cramped by the
's' phantom type :
{-# LANGUAGE Rank2Types #-}
newtype MyST a = MyST (forall s. ST s a)
-- ^ I cannot use deriving (Monad) through GeneralizedNewtypeDeriving
Try `return x = MyST (return x)`. It's (.) that throws it off.
- Jake
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Thanks! It works this way.
I often forget the dangers of point-free notation...
2011/3/9 Jake McArthur jake.mcart...@gmail.com
Try `return x = MyST (return x)`. It's (.) that throws it off.
- Jake
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On Wed, 9 Mar 2011, Yves Parès wrote:
Hello,
I am trying to make a monad that uses ST internally.
But even when reducing this to the simplest case I'm still cramped by the 's'
phantom
type :
{-# LANGUAGE Rank2Types #-}
newtype MyST a = MyST (forall s. ST s a)
-- ^ I cannot use deriving
On Tue, Mar 8, 2011 at 08:23, Max Bolingbroke
batterseapo...@hotmail.com wrote:
On 8 March 2011 05:28, Jason Dusek jason.du...@gmail.com wrote:
gcc -g -Wall -O2 -fPIC -Wall -o import \
-I/usr/lib/ghc-6.12.1/include/ \
import.c exports.so
In my experience, the easiest way to do
The Haskell Platform web page at http://hackage.haskell.org/platform//
seems to need updating. (Incidentally, that double slash at the end
doesn't look right).
* The next release is promised in Jan 2011.
* The Release Timetable schedules the next release for 5 March 2011.
I just worry that
Hello,
I use addFinalizer from System.Mem.Weak for performing some actions on
data just before that is reclaimed by GC. Registered in this way
finalizer is called surprisingly early for me, much earlier the data is
tend to be collected.
I've attached source code of simple two-threaded program.
We're about 1 day away from the release. Hold tight!!
-- Don (scramble scramble)
On Wed, Mar 9, 2011 at 1:21 PM, Paul Johnson p...@cogito.org.uk wrote:
The Haskell Platform web page at http://hackage.haskell.org/platform// seems
to need updating. (Incidentally, that double slash at the end
On Wed, Mar 9, 2011 at 3:54 PM, balodja balo...@zlug.asia wrote:
Hello,
I use addFinalizer from System.Mem.Weak for performing some actions on
data just before that is reclaimed by GC. Registered in this way
finalizer is called surprisingly early for me, much earlier the data is
tend to be
Both your replies where very helpful. I combined both approaches to
get nearer to what I want.
class Lit α where lit ∷ Integer → α
class Add α where add ∷ α → α → α
instance Lit Integer where lit = fromInteger
instance Add Integer where add = (+)
This time I require TypeSynonymInstances:
Well, I want to hide the fact that I'm using ST, so if I can hide the
existential type 's' it is better.
BTW, does someone know why the ST default implementation (the one exposed by
Control.Monad.ST) is strict, whereas those of State et Writer are lazy?
2011/3/9 Henning Thielemann
Hi Jason,
Following your advice, I was able to get a working main,
linking the .o's (no attempt at an SO this time) with GHC.
I haven't tried it, but how about this:
1. Use ghc to link a standard Haskell executable that requires your
libraries. Run the link step with -v so you can see the
Dear all,
I released new versions of some of my packages. Here are the changelogs:
http://hackage.haskell.org/package/regions-0.9
http://hackage.haskell.org/package/regions-mtl-0.3.1.5
http://hackage.haskell.org/package/regions-monadstf-0.3.1.5
* Switch from monad-peel to monad-control.
*
On Wed, Mar 9, 2011 at 6:21 PM, Yves Parès limestr...@gmail.com wrote:
Well, I want to hide the fact that I'm using ST, so if I can hide the
existential type 's' it is better.
In practice if you want to actually _use_ ST you'll find you'll need to let
the world escape into your type.
Welcome to issue 172 of the HWN, a newsletter covering developments in
the [1]Haskell community. This release covers the week of February 27
to March 05, 2011.
Announcements
Jasper Van der Jeugt [2]announced the release of version 3 of Hakyll.
He informs us that this is a complete
I've gleaned a little bit of useful info from looking at what
GHC spits out with -v; I found that ordering the libraries in
the way they do it makes one of my undefined symbols
(`hs_free_stable_ptr') go away.
However, my library ends up with a couple undefined
__stginit_* symbols
Confirmed for me on IPv6 as well.
--
Simon Heath http://alopex.li/ Science, games, computers, life.
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Hey All,
As of installing xcode 4 earlier today,
i'm getting errors of the form
ld: library not found for -lcrt1.10.5.o
collect2: ld returned 1 exit status
for any haskell code that invokes ld in its cabal install process.
1) is this related to some problem in xcode / what the haskell code
after experimenting by just naively moving the old Developer directory back
to its original location preceding the installation of xcode 4, everything
builds properly now.
still, this is not a reasonable long term solution. Any ideas about how this
might be fixed?
On Thu, Mar 10, 2011 at 12:33
Like Kenneth Hoste, I haven't been receiving mails from haskell-cafe@
nor libraries@ for a few days to a week now. What is the status of the
mailing lists?
(Please CC me off-list, for obvious reasons)
--
Live well,
~wren
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Thank you for your answer.
Does it work if you change:
forM_ [1..100] $ \x - do
send socket (show x)
threadDelay (10*1000)
to:
forM_ [1..100] $ \x - do
send socket (show x)
touch socket
threadDelay (10*1000)
Yes, that works.
I'm guessing what
Hi Haskellers,
I read about the cabal features for running test code from Setup.hs with
defaultMainWithHooks. I'm looking for more generic code that allows me to
place any haskell in a subdirectory test or so and cabal test will run this
test without any modification of my Setup.hs.
Is there
2011/3/10 wren ng thornton w...@freegeek.org
Like Kenneth Hoste, I haven't been receiving mails from haskell-cafe@ nor
libraries@ for a few days to a week now. What is the status of the mailing
lists?
I don't have the status, but I am still receiving emails from cafe and
libraries.
David.
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