Christopher Done wrote:
It's very easy to state this problem without enough details and mislead
people into providing a solution for a different problem, so I'll try to
include all the information and use-case. I need a function that can
store a value in a concrete opaque type. I know the type
On 4 October 2013 10:56, Heinrich Apfelmus apfel...@quantentunnel.de wrote:
In particular, the Locker stores arbitrary values like Dynamic , except
that values are extracted and removed with the help of a Key . This gets
rid of the Typeable constraint.
lock :: Key a - a - Locker
I can't
Christopher Done wrote:
On 4 October 2013 10:56, Heinrich Apfelmus apfel...@quantentunnel.de wrote:
In particular, the Locker stores arbitrary values like Dynamic , except
that values are extracted and removed with the help of a Key . This gets
rid of the Typeable constraint.
lock ::
| However, I want to write this as a core-to-core
| translation as a ghc-plugin. I want the definition go = putStrLn Hello
| World! to be translated to what I wrote above. Core cannot generate new
| names to be exported from a module, so go_ is now gone.
Wait... what do you mean Core cannot
Tom Ellis wrote:
On Wed, Oct 02, 2013 at 11:24:39AM +0200, Heinrich Apfelmus wrote:
I'm not sure whether the Eq instance you mention is actually
incorrect. I had always understood that Eq denotes an equivalence
relation, not necessarily equality on the constructor level.
There's a
While re-reading Brent Yorgey's Excellent Typeclassopedia I converted it
to Pandoc Markdown in order to be able to create an EPUB version. Having
a “real” e-book meant that I could comfortably read it on my e-book
reader and highlight text and take notes while reading. I also fixed
some minor
That's great — thank you!
On Fri, Oct 4, 2013 at 3:13 PM, Erlend Hamberg ehamb...@gmail.com wrote:
While re-reading Brent Yorgey's Excellent Typeclassopedia I converted it
to Pandoc Markdown in order to be able to create an EPUB version. Having
a “real” e-book meant that I could comfortably
Hi Chris,
Maybe this package (from Edward Kmett, surprisingly) could help:
http://hackage.haskell.org/package/constraints-0.3.3/docs/Data-Constraint.html?
Considering it kind of reifies the type class constraints, I'm wondering
whether you could use this to carry the constraints along the value
Hi guys,
I have been willing to have a nice GUI DSEL with good aesthetics for a
while. I think the hardest part wouldn't be the API, but really what
library we use underneath so that it's cross-platform and easy to install
for everyone. But I would love for something like that to happen and am
I don't think I would quite say haskell-game is quite relevant. For that
matter, the implementation on GitHub is not very good. It's too complicated
to scale and too specialized. I've been starting a fresh implementation,
since I learned a lot about what I really want to do writing that, but it
is
Yes, sorry, why I brought up haskell-game wasn't clear. I meant to say
there are already quite a few people willing to improve the situation of
graphics programming in Haskell (may it be GUI, games, visualization, ...).
And I think we should definitely talk to each other and try to come up with
My name is Charles Weitzer. I have a client with a startup quantitative
hedge fund located in Northern California. The Fund currently manages a very
healthy amount of capital. The founders have PhD's in Computer Science from
Stanford and in Statistics from Berkeley. They have made unpublished
Hi,
I'm trying to create an FFI library to CHOLMOD (
http://www.cise.ufl.edu/research/sparse/cholmod/) but am having problems.
My project is here: github.com/tdox/hcholmod. I can link an executable
with the build script in the examples directory (line 4). But line 7 does
not work (I get
Newclasses are something like instances, but out of scope. In a baggage.
We don't use them for interfere their functions.
This why newclasses never overlap each other and between them and any
instances.
We use newclasses to plug-in/connect to any related class or combine data
Replying to you
On Fri, Oct 4, 2013 at 10:31 PM, Wvv vite...@rambler.ru wrote:
Newclasses are something like instances, but out of scope. In a baggage.
So under the hood of GHC, newclasses would be partially filled in
dictionaries.
We already have too many classes: (...)
We can't divide all classes to
Dear Alp,
Alp Mestanogullari wrote:
[snip]
I have been willing to have a nice GUI DSEL with good aesthetics for a
while. I think the hardest part wouldn't be the API, but really what
library we use underneath so that it's cross-platform and easy to
install for everyone. But I would love for
Hi list,
What’s the preferred way of calling into Python from Haskell? I’ve
found MissingPy[0], but it seems to be somewhat bitrotten and a couple
of experiments yielded segfaults. There’s also the cpython
package[1], but that seems to require Python 3.3, and I’m trying to
call into code
Hello,
I'm looking for a combinator along the lines of
() :: Lens' a b - Lens' a b' - Lens' a (b,b')
I can see how it could lead to lenses that don't follow the laws, but
for Lenses which are somehow independent (like _1 and _2), it works
perfectly well. Is there a way in lens to specify this
Manuel-
Try my fork of the MissingPy library, I've brought it up to date and it
seems to function ok with current ghc/python.
www.github.com/arjuncomar/missingpy.git
The standalone branch also removes a lot of the extra dependencies
MissingPy has for extra functionality you probably don't need.
If these said libraries let us write a good API on top, then perfect! The
problem is to actually pick the ones fulfilling our needs I think, all the
major candidatures have pretty serious drawbacks, AFAIK.
On Sat, Oct 5, 2013 at 12:36 AM, Robin KAY komad...@gekkou.co.uk wrote:
Dear Alp,
Alp
I just upgraded my ubuntu laptop to 13.04 and haskell platform is gone!!
http://askubuntu.com/questions/286764/how-to-install-haskell-platform-for-ubuntu-13-04
What is the current status on this?
Is 13.10 going to correct this?
___
Haskell-Cafe mailing
13.04 has packages for ghc 7.6.2
It is easy to install latest haskell platform though.
Just run this script: https://github.com/chrisprobst/ubuntu-raring-haskell
On Friday, October 4, 2013 8:11:46 PM UTC-7, rusi wrote:
I just upgraded my ubuntu laptop to 13.04 and haskell platform is gone!!
On Sat, Oct 5, 2013 at 9:05 AM, Vagif Verdi vagif.ve...@gmail.com wrote:
13.04 has packages for ghc 7.6.2
It is easy to install latest haskell platform though.
Just run this script: https://github.com/chrisprobst/ubuntu-raring-haskell
I was hoping that something a little less painful than
That will give you only ghc 7.6.2. If you want latest haskell-platform,
source compile is the only option. And btw it is not THAT painful :)
You run the script, wait 2-3 minutes and tada!
On Friday, October 4, 2013 8:44:29 PM UTC-7, rusi wrote:
On Sat, Oct 5, 2013 at 9:05 AM, Vagif Verdi
On Sat, Oct 5, 2013 at 9:18 AM, Vagif Verdi vagif.ve...@gmail.com wrote:
That will give you only ghc 7.6.2. If you want latest haskell-platform,
source compile is the only option. And btw it is not THAT painful :)
You run the script, wait 2-3 minutes and tada!
Ok so someone is very confused
On Wed, 02 Oct 2013 12:24:25 +0200, Atze Dijkstra a...@uu.nl wrote:
Hi,
as for wxHaskell, it is currently maintained at
https://github.com/wxHaskell/wxHaskell, compilable with wxWidgets 2.9.5
and GHC 7.6. Work is underway to fix various bugs introduced over time
by changes in wxWidgets,
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