FINAL CALL FOR PAPERS (DEADLINE EXTENSION)
14th International Symposium
Trends in Functional Programming 2013
Brigham Young University, Utah, U.S.A.
May 14-16, 2013
Note that syz is essentially based on Data.Data, which is no less
official than GHC.Generics. (The compiler can derive Data with
-XDeriveDataTypeable.)
I am not sure what your primary concern is. In case you are concerned
with the ease of deriving generic instances, almost every generics
library
On Thu, Apr 11, 2013 at 12:33 AM, Niklas Hambüchen m...@nh2.me wrote:
I'm writing a web server app, which I run in ghci:
:main localhost 8000
Unfortunately, after Ctrl-C and :reload, running it again:
** Exception: bind: resource busy (Address already in use)
This is pretty annoying,
Thanks Roman.
I'll probably go with Data.Data then. Certainly, I'm not looking for any
significant distractions and I'll heed your cautionary note.
I read that GHC.Generics is fit and fast in comparison to SYB, but that's not
really a big concern for me at the moment.
I just fell in to
Hi Luke,
Even though you might have made up your mind already, here's some more
info. If you want a
zipper that does not use Typeable (and thus runtime type comparison and
casting, which are
potentially inefficient), you can use the zipper in Multirec [1].
Creating a zipper based on GHC.Generics
The question of Set monad comes up quite regularly, most recently at
http://www.ittc.ku.edu/csdlblog/?p=134
Indeed, we cannot make Data.Set.Set to be the instance of Monad type
class -- not immediately, that it. That does not mean that there is no
Set Monad, a non-determinism monad that
On Thu, Apr 11, 2013 at 12:49:40PM +1200, Richard A. O'Keefe wrote:
On 10/04/2013, at 2:45 PM, o...@okmij.org wrote:
... unsafeInterleaveST is really unsafe ...
import Control.Monad.ST.Lazy (runST)
import Control.Monad.ST.Lazy.Unsafe (unsafeInterleaveST)
import Data.STRef.Lazy
One problem with such monad implementations is efficiency. Let's define
step :: (MonadPlus m) = Int - m Int
step i = choose [i, i + 1]
-- repeated application of step on 0:
stepN :: (Monad m) = Int - m (S.Set Int)
stepN = runSet . f
where
f 0 = return 0
On Thu, Apr 11, 2013 at 1:38 AM, Christopher Howard
christopher.how...@frigidcode.com wrote:
Hi. For my own learning, I wanted to see how the exp function is
implemented in GHC. I have GHC 7.4.1 source code open, but I'm having
trouble figuring out which file the actual function definition is
On Thu, Apr 11, 2013 at 1:19 AM, Richard A. O'Keefe o...@cs.otago.ac.nzwrote:
On 11/04/2013, at 12:56 PM, Brandon Allbery wrote:
Xcode 4.2 and on do not use /Developer at all. You have an older Xcode
on your system somehow, which does not understand newer object files; you
should remove the
On 04/11/2013 06:37 AM, Brandon Allbery wrote:
On Thu, Apr 11, 2013 at 1:38 AM, Christopher Howard
christopher.how...@frigidcode.com
mailto:christopher.how...@frigidcode.com wrote:
Hi. For my own learning, I wanted to see how the exp function is
implemented in GHC. I have GHC 7.4.1
On 04/11/2013 07:12 AM, Christopher Howard wrote:
On 04/11/2013 06:37 AM, Brandon Allbery wrote:
I traced it down some more: I think it eventually goes into the
compiler/nativeGen section where it is translated into the platform's
native version of the function. On my platform, I think this
On 04/10/2013 04:45 AM, o...@okmij.org wrote:
...
And yet there exists a context that distinguishes x == y from y ==x.
That is, there exists
bad_ctx :: ((Bool,Bool) - Bool) - Bool
such that
*R bad_ctx $ \(x,y) - x == y
True
*R bad_ctx $ \(x,y) - y == x
On Tue, 09 Apr 2013 21:54:15 +0200, Luc TAESCH luc.tae...@gmail.com
wrote:
WxHaskell and DragAndDrop
I would like to know how to use the following events handlers :
dropTargetOnData, dropTargetOnDrop, dropTargetOnEnter,
dropTargetOnDragOver….[1]
Could you check if my current believes
:)
--
--
Regards,
KC
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The basic problem is that the University has a strict policy
that academic staff must not have root access on any machine
that is connected to the University network. I was given an
administrator account so that I could resume the printer and
install (some) stuff, but /Developer is owned by root,
On Thu, Apr 11, 2013 at 7:41 PM, Richard A. O'Keefe o...@cs.otago.ac.nzwrote:
The basic problem is that the University has a strict policy
that academic staff must not have root access on any machine
that is connected to the University network. I was given an
administrator account so that I
On Apr 11, 2013, at 6:53 PM, Brandon Allbery wrote:
/Developer should not exist on a machine with Xcode 4.2 or later installed,
at all.
Unfortunately this is not completely true - there are some SDKs that still
install stuff in /Developer (NVIDIA comes to mind) but it's pretty obvious
The problem is that ^C only kills the main thread, but does not kill
any child threads that have been spawned.
In happstack the Conf has an optional field where you can supply a
ThreadGroup. When threads are forked they will be registered with the
ThreadGroup, and when you ^C, all those threads
I do have them before [extra]
Even just pacman -S ghc xmonad didn't seem to work right
Here's a section of the pacman.log messages, there's plenty more since
I tried reinstalling things different ways several times:
[2013-04-10 20:44] [PACMAN] Running 'pacman -R ghc'
[2013-04-10 20:49] [PACMAN]
You should use `haskell-xmonad` package. `xmonad` is from [community]
and has another set of dependencies.
Fabio
2013/4/11 Sean Escriva sean.escr...@gmail.com:
I do have them before [extra]
Even just pacman -S ghc xmonad didn't seem to work right
Here's a section of the pacman.log messages,
On Wed, Apr 10, 2013 at 09:35:05PM -0700, Sean Escriva wrote:
I tried to make a clean switch by uninstalling all haskell pkgs+ghc,
but I missed something so now I'm getting an odd error when I try to
install xmonad or xmonad-contrib:
soundwave ~ » sudo pacman -S xmonad
If you are using
That's what it was then, thanks!
On Thu, Apr 11, 2013 at 3:09 PM, Linus Arver linusar...@gmail.com wrote:
On Wed, Apr 10, 2013 at 09:35:05PM -0700, Sean Escriva wrote:
I tried to make a clean switch by uninstalling all haskell pkgs+ghc,
but I missed something so now I'm getting an odd error
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