Ivan Miljenovic wrote:
Would other Australians be interested in having our own Hackathon (why
should all those northerners have all the fun)?
Agreed!
I'm thinking about
organising it to be in the July break between university semesters.
I'm a working programmer who has no idea when the
On Mar 15, 2010, at 12:09 PM, Jeremy Shaw wrote:
In happstack we use a really horrible trick involving template
haskell where we see if the SockAddrInet6 constructor exists at
compile time and conditionally compile different versions of the
code that way. But it is really ugly.
Maybe a
Erik de Castro Lopo mle...@mega-nerd.com writes:
I'm a working programmer who has no idea when the university semesters
start and end. Please don't leave me out :-).
[snip]
As the father of a school age child, I have some rather high demands
on my 4 weeks of annual leave. For me, it would be
Hi! Can anyone tell me why this code does not work? I cannot seem to
figure why it is broken...
{-# LANGUAGE MultiParamTypeClasses, FunctionalDependencies, FlexibleInstances,
UndecidableInstances, FlexibleContexts, EmptyDataDecls, ScopedTypeVariables,
TypeOperators, TypeSynonymInstances #-}
Giuseppe Maggiore giuseppe...@gmail.com writes:
Hi! Can anyone tell me why this code does not work? I cannot seem to
figure why it is broken...
The error message (and how you got it) would help...
{-# LANGUAGE MultiParamTypeClasses, FunctionalDependencies, FlexibleInstances,
The error message (obtained by loading the file with ghci) is:
GHCi, version 6.10.4: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer ... linking ... done.
Loading package base ... linking ... done.
[1 of 1] Compiling Main
What about this?
{-# LANGUAGE MultiParamTypeClasses, FunctionalDependencies, FlexibleInstances,
UndecidableInstances, FlexibleContexts, EmptyDataDecls, ScopedTypeVariables,
TypeOperators, TypeSynonymInstances #-}
data Data k = Pair Integer (() - k)
data RecData = RecData (Data RecData)
We are happy to announce the new release of Feldspar and its compiler!
http://feldspar.sourceforge.net/
Feldspar is an embedded domain-specific language for digital signal
processing. It is developed as a joint project with Ericsson, ELTE
university and Chalmers university.
This is an
Well, first of all thanks!
Second, why the need for explicit quantification?
On Tue, Mar 16, 2010 at 2:39 AM, Chris Eidhof ch...@eidhof.nl wrote:
What about this?
{-# LANGUAGE MultiParamTypeClasses, FunctionalDependencies,
FlexibleInstances,
UndecidableInstances, FlexibleContexts,
On 16 mrt 2010, at 10:58, Giuseppe Maggiore wrote:
Well, first of all thanks!
Second, why the need for explicit quantification?
I'm not sure, but I think it has to do with ambiguity. I think it's similar to
the problem:
readShow :: (Read a, Show a) - String - String
readShow = show . read
* A plotting library using Ben's newly released Gloss library (for
people who can't or won't install Gtk2Hs to get Chart working; Alex
Mason is interested in this)
* Various graph-related project (graphviz, generic graph class, etc.;
this assumes someone else apart from me cares about this
Hi Jeremy
Is this really a problem practically rather than hypothetically?
Data.Text and Syb-with-class - both are general, neither uses the
other for their implementation, adding a dependency to one sounds like
a bad idea - so making a separate 'instance' package seems most
sensible.
Unless
Don wrote:
Good work. I have very little time to maintain hs-plugins, as I'm not
using it, so I'm glad you took a look at this.
Thanks!
I have now released version 1.1 (I know at least one person was
waiting on this), which adds a loadDynamic that grovels inside .hi
files to check that the
Roman C. has cleverly added hledger to the list of topics for this
weekend's ZuriHac. I will be working remotely at least on sunday
(PDT), and available to support where possible. You are invited to
join us! Some ideas -
- add Chart or google charts to the web ui
- smarter add/convert
Hi Cafe,
I was looking for a way to generate 32 bits haskell binary on a 64 bits linux.
I've looked at the user guide and tried to use the -fvia-C with -optc -m32 but
the generated C file doesn't compile with lots of error messages like the
following:
$ ghc -o hello hello.hs -fvia-C -optc -m32
On Tue, Mar 16, 2010 at 11:15 AM, Henning Thielemann
thunderb...@henning-thielemann.de wrote:
newtype T3 a = T3 (a,a,a)
which could well be
data T3 a = T3 a a a
I chose that specific representation just because at the end I want to use
normal tuples. I thought this way was easier for
On Tue, 16 Mar 2010, Diego Echeverri wrote:
There are only two hard things in Computer Science: cache invalidation
and naming things
- Phil Karlton
I'm open to suggestions :-)
It depends on the intended use. :-] Maybe something with vector?
___
I think you need to install the 32bit ghc first, because you'll need all
the 32bit haskell libs. At least I was able to use the 32bit ghc
(version 6.8.2) on a 64 bit linux by changing the script in the bin
directory from
exec $GHCBIN $TOPDIROPT ${1+$@}
to
exec $GHCBIN -optc-m32 -opta-m32
On Mon, Mar 15, 2010 at 07:31:12PM -0500, Louis Wasserman wrote:
I'm going to phrase this as a challenge, because I think that's likely to
get the best response:
I just released a package,
th-kindshttp://hackage.haskell.org/package/th-kinds,
which attempts to automatically infer the kind of
On Mon, Mar 15, 2010 at 5:31 PM, Louis Wasserman
wasserman.lo...@gmail.com wrote:
GADT types that cannot be reified by TH. Essentially, I think this is the
set of GADT data types that actually couldn't be implemented without GADTs.
Not sure, though. In any event, at the moment, I don't think
Actually, with existential types and type equality constraints, GADTs
are redundant.
The algorithm is pretty simple:
- existentially quantify over all type variables mentioned in the GADT
constructor
- add a type equality constraint to match the result type
- (optional) simplify
While
[Cc to the HGL maintainer, I hope that is ok.]
Hallo,
I am trying to use HGL. My configuration is
Mac OS X 10.6.2 (using X11)
ghc 6.12.1
HGL 3.2.0.2 (via cabal-install)
My program opens a window, draws points and lines, with a considerable
amount of calculation between the lines, and then
I already have one or two submissions, but a few more would be
great. If you've been thinking about submitting something but
weren't sure or haven't gotten around to it yet, now's the time!
--
Whether you're an established academic or have only just started
learning Haskell, if you
Am 16.03.10 19:55, schrieb Carsten Schultz:
I would also like to know if it works on other
platforms/versions.
To answer my own question: I just tested
Debian / ghc 6.8.2 / HGL 3.2.0.0-3
(with X redirected to a Mac, though)
The behaviour is exactly the same.
Carsten
Am Dienstag 16 März 2010 20:23:54 schrieb Carsten Schultz:
Am 16.03.10 19:55, schrieb Carsten Schultz:
I would also like to know if it works on other
platforms/versions.
To answer my own question: I just tested
Debian / ghc 6.8.2 / HGL 3.2.0.0-3
(with X redirected to a Mac, though)
The
Aren't ErrorT and ReaderT instances of Applicative already? (At least in
'transformers' package?)
what difference between 'mtl' and 'transformers' packages ? 'mtl' goes
with Haskell Platform as standard package, so what is the benefit of
'transformers' library ?
Thanks,
Vasyl
Vincent Hanquez wrote:
I was looking for a way to generate 32 bits haskell binary on a 64 bits linux.
Once absolutely reliable and foolproof way of doing this is to run a
32 bit chroot within your 64 bit system and then then install the 32
bit vesion of GHC in the chroot.
In Debian (and
On 16/03/2010, at 10:45 PM, Alex Mason wrote:
I'd suggest focusing on core Haskell infrastructure, like compilers and
tools, rather than individual libraries -- though it all depends on who
wants to come along.
Basically, we're just aiming to get a bunch of like minded people together,
On 16/03/2010 01:05, Phil wrote:
Scrap my original query - the problem isn't as black white as I
thought.
The below works fine - I've changed the response type from json to
xml strange, but for some reason downloading json doesn't work
it's fine on Linux.
I'm guessing this is more
On 16/03/2010, at 4:28 PM, Ivan Miljenovic wrote:
Would other Australians be interested in having our own Hackathon (why
should all those northerners have all the fun)? I'm thinking about
organising it to be in the July break between university semesters.
There was a previous consideration a
Hi everyone,
I am working with
MacOS X 10.6.2
ghc 6.12.1
GLFW 0.4.2
OpenGL 2.4.0.1
mkbndl (freshly installed, should be 0.2.1)
I have copied sample program from
http://www.haskell.org/haskellwiki/GLFW#Sample_Program to a file named
GLFWTest.hs. (I had to change some Floats to GLfloats.)
No I
Would other Australians be interested in having our own Hackathon (why
should all those northerners have all the fun)? I'm thinking about
organising it to be in the July break between university semesters.
There was a previous consideration a few years back to have an
OzHaskell group
Hi!
I did a little experiment in last week with haskell. According this (
http://graphics.cs.brown.edu/games/quake/quake3.html) tutorial, I wrote a
quake 3 bsp map loader and viewer from scratch. (It is independent from
frag)
The code is quiet small (~900 lines with comments) and it is based on
On 16 March 2010 16:28, Ivan Miljenovic ivan.miljeno...@gmail.com wrote:
Would other Australians be interested in having our own Hackathon (why
should all those northerners have all the fun)? I'm thinking about
organising it to be in the July break between university semesters.
Yes, I am
OK, so we have a fair number of people indicating interest... so which
weekend would be preferred?
26/27 June
3/4 July
10/11 July
17/18 July
Or should we take this to the wiki rather than the mailing list?
On 16 March 2010 16:28, Ivan Miljenovic ivan.miljeno...@gmail.com wrote:
Would other
Erlang has yaws (http://yaws.hyber.org/)
Scala has lift (http://liftweb.net/)
Python has django (http://www.djangoproject.com/)
Ruby has rails (http://rubyonrails.org/)
How about haskell ? Is there any similar framework, which should be steady,
powerful and easy to use, in haskell ?
Sincerely!
There is a dedicated mailinglist about this topic, see below.
There is a little bit more traffic the last days.
If you have a look at hackage you can see that there are some
frameworks. WASH is still missing. I'm going to change that though.
Have a look at
On 16 Mar 2010, at 18:28, Ivan Miljenovic wrote:
So, at least as an initial listing, we'd need to have a listing of:
1) Who's interested
I am.
2) What dates are good
A weekend would be best for me.
3) What projects people want to work on
Leksah.
4) Where we can host this
I suppose
RVM (at http://rvm.beginrescueend.com) is a rather nice tool for
managing multiple ruby installations - it gives support for switching
between ruby environments (similar to gcc_select and friends), and
also exporting lists of packages so that you can easily bring up a
given set of gems in
I wrote it: It's called Hack-Nix and utilizies the Nix repository
manager. I've added a wiki page to haskell.org some time ago.
Drawbacks: Right now it doesn't make sense to include all hackage
packages because resolving dependencies would never end because its
written in Nix language.
I can
It's young, but Yesod: http://www.yesodweb.com/code.html
Michael
On Tue, Mar 16, 2010 at 5:15 PM, zaxis z_a...@163.com wrote:
Erlang has yaws (http://yaws.hyber.org/)
Scala has lift (http://liftweb.net/)
Python has django (http://www.djangoproject.com/)
Ruby has rails
On Mar 16, 2010, at 20:59 , Mark Wotton wrote:
Do we have any similar system for ghc/cabal? I quite frequently find
myself switching between 6.10 and 6.12 for various things, and it's
always a bit painful to get your environment up to speed. Is there a
golden road for this stuff, or do the
On Mar 16, 2010, at 17:03 , Vasyl Pasternak wrote:
Aren't ErrorT and ReaderT instances of Applicative already? (At
least in
'transformers' package?)
what difference between 'mtl' and 'transformers' packages ? 'mtl' goes
with Haskell Platform as standard package, so what is the benefit of
Is there any way to propose a SoC idea right now? My account doesn't
seem to have been created correctly, so I can't login to the Trac.
I think it'd be interesting for a student to abstract the layout model
in xmonad, separating it into an independent library. Other
applications could then use
Be sure to try your user name without any capitals - that worked for me...
On Tue, Mar 16, 2010 at 6:59 PM, Jeff Wheeler j...@nokrev.com wrote:
Is there any way to propose a SoC idea right now? My account doesn't
seem to have been created correctly, so I can't login to the Trac.
I think it'd
Hi guys!
Thomas Schilling suggested me to cross-post this here. Basically
I'm thinking about the possibility of extending Cabal's
Preprocessor mechanism for the GSoC. I've been working to provide
uuagc with a Custom build mechanism for Cabal and in this process
I have stumbled upon some
On Tue, Mar 16, 2010 at 9:32 PM, Thomas DuBuisson
thomas.dubuis...@gmail.com wrote:
Be sure to try your user name without any capitals - that worked for me...
The account I created is jeffwheeler -- all lowercase, no spaces --
unfortunately, so that doesn't seem to be the problem I'm hitting.
Hi,
I am a beginner for haskell. I was stuck with a sample of programming
in haskell. Following is my code:
-
import Prelude hiding (return, fail)
type Parser a = (String-[(a,String)])
return :: a - Parser a
return v =
Hi,
You can only use do notation if you actually create an instance of Monad,
which for Parser you haven't done. To continue as is, replace the first line
with:
import Prelude hiding (return, fail, (=))
and the p function with
p = item = \x - item = \_ - item = \y - return (x, y)
I've
I cannot login too. Account is mihai.maruseac.
On Wed, Mar 17, 2010 at 5:37 AM, Jeff Wheeler j...@nokrev.com wrote:
On Tue, Mar 16, 2010 at 9:32 PM, Thomas DuBuisson
thomas.dubuis...@gmail.com wrote:
Be sure to try your user name without any capitals - that worked for me...
The account I
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