2010/1/27 Andrew U. Frank fr...@geoinfo.tuwien.ac.at:
{Snip]
dotoBfield :: (b - b) - X a b c - X a b c
dotoBfield op x = x { bfield = op (bfield x)}
and similar for A and C.
is there a better idiom to achieve the same effect?
can this be automated (for example, using generics)?
Hello
Hi,
I'm looking for documentation on using XRC files with wxHaskell.
I finally managed to cabal-install wxHaskell last night alas sans docs.
Günther
BTW: I'm using wxFormBuilder, any other good tools out there?
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I need ideally some generalizations of unionWith and unionWithKey, for
efficiency matters (i.e. avoiding conversions and traversing the maps
more than once). I could use a modification of the code in Map.hs, but
then the problem is that the module Map interface does not export the
we used wx originally but switched to gtk. the great advantage is glade...
which is very flexible and still you can add/change whatever you need to in gtk
in your haskell code.
we checked porting between linux (ubuntu) and windows (xp) and encountered no
problems.
On Wed, 27 Jan 2010 11:09:06 +0100
Günther == Günther Schmidt gue.schm...@web.de wrote:
Günther I'm looking for documentation on using XRC files with
Günther wxHaskell.
I'd like to find it too...so, far I've found only two samples:
xrcmenu.xrc controls.xrc.
Günther BTW: I'm using
On Jan 27, 2010, at 5:53 AM, Hans Aberg wrote:
I need ideally some generalizations of unionWith and unionWithKey, for
efficiency matters (i.e. avoiding conversions and traversing the maps more
than once). I could use a modification of the code in Map.hs, but then the
problem is that the
Hello Gour,
creating the .xrc files with WxFormBuilder isn't the problem, I'd need
to see the .hs files where these resources are imported and used. Do you
happen to know where to find those too?
Günther
Am 27.01.10 13:38, schrieb Gour:
On Wed, 27 Jan 2010 11:09:06 +0100
Günther ==
On Wed, 27 Jan 2010 14:56:28 +0100
Günther == Günther Schmidt gue.schm...@web.de wrote:
Günther creating the .xrc files with WxFormBuilder isn't the problem,
Günther I'd need to see the .hs files where these resources are
Günther imported and used. Do you happen to know where to find those
On 27 Jan 2010, at 14:56, Jan-Willem Maessen wrote:
So here, one would want:
(a - c) - (b - c) - (a - b - c) - Map k a - Map k b - Map
k c
where the two first functions are applied when the first or second
key is missing.
Ah, the swiss army knife function on maps. This particular
The other HDBC problem I have is various dependencies relying on QC1.
The next HP will ship with QC 2.1 (in coming weeks), so it might be a
good time for people to start migrating, since that will be the only
version of QC on many distros.
I would strongly suggest moving to QC 2 for other
Hi Guenther, Gour
On Wed, 27 Jan 2010 13:38 +0100, Gour g...@gour-nitai.com wrote:
On Wed, 27 Jan 2010 11:09:06 +0100
Günther == Günther Schmidt gue.schm...@web.de wrote:
Günther I'm looking for documentation on using XRC files with
Günther wxHaskell.
I'd like to find it too...so, far
Neil Mitchell wrote:
The other HDBC problem I have is various dependencies relying on QC1.
The next HP will ship with QC 2.1 (in coming weeks), so it might be a
good time for people to start migrating, since that will be the only
version of QC on many distros.
I would strongly suggest
On Tue, 26 Jan 2010 22:41:44 -0800
Thomas DuBuisson thomas.dubuis...@gmail.com wrote:
Brian Denheyer bri...@aracnet.com wrote:
On Tue, 26 Jan 2010 10:54:03 -0800
Thomas DuBuisson thomas.dubuis...@gmail.com wrote:
doEvent f usDelay = forkIO $
threadDelay usDelay
doEvent f
On Jan 27, 2010, at 9:42 AM, Hans Aberg wrote:
On 27 Jan 2010, at 14:56, Jan-Willem Maessen wrote:
So here, one would want:
(a - c) - (b - c) - (a - b - c) - Map k a - Map k b - Map k c
where the two first functions are applied when the first or second key is
missing.
Ah, the swiss
On 27 Jan 2010, at 16:33, Jan-Willem Maessen wrote:
I'm not sure why you want to throw in functions between maps in the
two first arguments. Then there is no requirement that single keys
are preserved.
But it is a good idea to have a Maybe so that one can remove keys
on the fly.
A good
On Wed, Jan 27, 2010 at 7:31 AM, Brian Denheyer bri...@aracnet.com wrote:
On Tue, 26 Jan 2010 22:41:44 -0800
Thomas DuBuisson thomas.dubuis...@gmail.com wrote:
Brian Denheyer bri...@aracnet.com wrote:
On Tue, 26 Jan 2010 10:54:03 -0800
Thomas DuBuisson thomas.dubuis...@gmail.com
Dear Haskellers,
while trying to encode a paradox recently found in Coq if one has
impredicativity and adds injectivity of type constructors [1] I
stumbled on an apparent loop in the type checker when using GADTs,
Rank2Types and EmptyDataDecls.
{-# OPTIONS -XGADTs -XRank2Types
I've just released ThreadScope version 0.1 on Hackage. Threadscope is a
graphical utility for viewing profiling information about Haskell threads. It
was written jointly with Simon Marlow and Donnie Jones. It uses Gtk2HS so it
works under Windows and the L-word operating system although there
Hi,
I'm writing cross-platform application in Haskell which should be
running under Windows and Linux. Under Linux configuration is stored
in the /etc directory, and under Windows configuration is meant to be in
the application directory. So, is there a way to get an application
directory path
Hi Matveev,
You might be interested in the System.Directory module:
http://hackage.haskell.org/packages/archive/directory/1.0.0.3/doc/html/System-Directory.html
HTH,
-chris
On 27 jan 2010, at 18:06, Matveev Vladimir wrote:
Hi,
I'm writing cross-platform application in Haskell which should
So, is there a way to get an application
directory path under Windows? I remember that there is a way to do this
using WinAPI, but how to do this Haskell?
The System.Directory module has some methods to get specific
directory names in an OS agnostic manner.
The closest method that matches
Other responses have been great but if you are cabalizing you might also be
interested in:
http://neilmitchell.blogspot.com/2008/02/adding-data-files-using-cabal.html
Cheers,
Thomas
On Wed, Jan 27, 2010 at 9:06 AM, Matveev Vladimir dpx.infin...@gmail.comwrote:
Hi,
I'm writing cross-platform
Program directory is not system directory. So it doesn't have CSIDL.
Program directory is the folder where executable file is located.
I certainly remember that there is a way to get it without, for example,
setting it in registry during install...
On Wed, Jan 27, 2010 at 12:31:19PM -0500, Rahul
Thanks, but my program will be distributed in self-made installer (on
windows), though I'm using cabal and the sources are GPL-licensed.
Just for users' convenience :)
On Wed, Jan 27, 2010 at 09:42:45AM -0800, Thomas DuBuisson wrote:
Other responses have been great but if you are cabalizing you
Oh yeah, it seems I found it. Solution is to use getModuleFileName and
getModuleHandle functions from System.Win32.DLL. Thanks for attention :)
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Here's one for you to ponder.
7 is a number. 7 is an integer, and integers are numbers.
7 is not a field. 7 is an element of [at least one] field, but 7 itself
is not a field.
7 is not a group. 7 is a member of the set of integers, but the set of
integers is not a group either. The set of
Andrew Coppin wrote:
7 is a number. 7 is an integer, and integers are numbers.
7 is not a field. 7 is an element of [at least one] field, but 7 itself
is not a field.
7 is not a group.
Why not? It might be useful to use the notation '7' for the cyclic group
with 7 elements.
7 is a
The list type constructor ([] :: * - *) is a functor, and if you add the
implementations of join/return (or just return and bind) those together make
the monad. The value-level list [3,5,8] is just a list :)
On Wed, Jan 27, 2010 at 1:30 PM, Andrew Coppin
andrewcop...@btinternet.comwrote:
Here's
Am Mittwoch, den 27.01.2010, 21:19 +0300 schrieb Vladimir Matveev:
Oh yeah, it seems I found it. Solution is to use getModuleFileName and
getModuleHandle functions from System.Win32.DLL. Thanks for attention :)
You can also use the (portable) package 'directory' from Hackage
On Wed, Jan 27, 2010 at 11:39 AM, Jochem Berndsen joc...@functor.nl wrote:
Now, here's the question: Is is correct to say that [3, 5, 8] is a
monad?
In what sense would this be a monad? I don't quite get your question.
I think the question is this: if m is a monad, then what do you call
a
Luke Palmer wrote:
On Wed, Jan 27, 2010 at 11:39 AM, Jochem Berndsen joc...@functor.nl wrote:
Now, here's the question: Is is correct to say that [3, 5, 8] is a
monad?
In what sense would this be a monad? I don't quite get your question.
I think the question is this: if m is a monad, then
On Jan 27, 2010, at 10:54 AM, Hans Aberg wrote:
On 27 Jan 2010, at 16:33, Jan-Willem Maessen wrote:
I'm not sure why you want to throw in functions between maps in the two
first arguments. Then there is no requirement that single keys are
preserved.
But it is a good idea to have a
On 27 Jan 2010, at 21:29, Jan-Willem Maessen wrote:
I'm thinking about
(k - Maybe a - Maybe b - Maybe c) - Map k a - Map k b - Map k c
The first two Maybe's tell if the keys are present, the last if one
wants it in the resulting map.
That has the same behavior semantically, but it's no more
Hi
On 27 Jan 2010, at 20:14, Luke Palmer lrpal...@gmail.com wrote:
On Wed, Jan 27, 2010 at 11:39 AM, Jochem Berndsen
joc...@functor.nl wrote:
Now, here's the question: Is is correct to say that [3, 5, 8] is a
monad?
In what sense would this be a monad? I don't quite get your question.
I
Am Mittwoch 27 Januar 2010 22:50:35 schrieb Conor McBride:
It has been known to call such things 'computations', as opposed to
'values', and even to separate the categories of types and expressions
which deliver the two.
As usual, that only works part of the time. [1,4,15,3,7] is not a
The compiler doesn't loop for me with GHC6.10.4; I think GADTs still
had some bugs in GHC6.8.
That said, this is pretty scary. Here's a simplified version that
shows this paradox with just a single GADT and no other extensions.
No use of fix or recursion anywhere!
{-# LANGUAGE GADTs #-}
module
Ryan Ingram wrote:
The compiler doesn't loop for me with GHC6.10.4; I think GADTs still
had some bugs in GHC6.8.
That said, this is pretty scary. Here's a simplified version that
shows this paradox with just a single GADT and no other extensions.
No use of fix or recursion anywhere!
{-#
On 27 Jan 2010, at 22:02, Daniel Fischer daniel.is.fisc...@web.de
wrote:
Am Mittwoch 27 Januar 2010 22:50:35 schrieb Conor McBride:
It has been known to call such things 'computations', as opposed to
'values', and even to separate the categories of types and
expressions
which
On Wed, Jan 27, 2010 at 8:51 AM, Satnam Singh satn...@microsoft.com wrote:
I’ve just released ThreadScope version 0.1 on Hackage. Threadscope is a
graphical utility for viewing profiling information about Haskell threads.
It was written jointly with Simon Marlow and Donnie Jones. It uses
Hans Aberg wrote:
For example, in Map String Integer (sparse representation of monomials)
compute the minimum value of all associative pairs with the same key
(the gcd); if only one key is present, the absent should be treated as
having value 0. So
unionWith min xs ys
will not work, because
On Jan 27, 2010, at 4:57 PM, Conor McBride wrote:
Yes, the separation is not clear in Haskell. (I consider this
unfortunate.) I was thinking of Paul Levy's call-by-push-value
calculus, where the distinction is clear, but perhaps not as fluid
as one might like.
What, exactly, is the
Hi all,
ghc-core.hs:263:13:
Not in scope: data constructor `C.ExitException'
Looks like this comes from the base control.exception ?
When I go to the web page for control.exception, there is no
exitexception.
My reading of the hackage entry for ghc-core makes me think that I've
got the
briand:
Hi all,
ghc-core.hs:263:13:
Not in scope: data constructor `C.ExitException'
Looks like this comes from the base control.exception ?
When I go to the web page for control.exception, there is no
exitexception.
My reading of the hackage entry for ghc-core makes me think
Don Stewart d...@galois.com writes:
Thanks for the report. ghc-core 0.5.1 was released today, so cabal
update; cabal install ghc-core and you should be fine.
Even though I told you about this problem (your overly loose base
constraint) four months ago?
--
Ivan Lazar Miljenovic
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