Mitchell
You might also be interested in the beginners mailing list. I've been
enjoying for about a month now!
http://www.haskell.org/mailman/listinfo/beginners
On Sat, Apr 24, 2010 at 9:57 PM, Luke Palmer lrpal...@gmail.com wrote:
On Sat, Apr 24, 2010 at 10:34 PM, mitch...@kaplan2.com
John Millikin jmilli...@gmail.com writes:
Thanks for the library! I'm sure it will be very useful for people
dealing with internationalized applications / libraries. I have a few
suggestions, which might make your library easier to use and maintain.
First, it's very common to include
Am Sonntag 25 April 2010 06:34:32 schrieb mitch...@kaplan2.com:
Luke already explained the type error, so I'll focus on the implementation.
Hi,
I'm just starting to learn, or trying to learn Haskell. I want to write
a function to tell me if a number's prime. This is what I've got:
f
Luke Palmer wrote:
The workhorse of our game has so far been generalized differentials.
While not entirely rigorous, they have provided a very nice framework
in which to express our thoughts and designs, and are very good at
highly dynamic situations which appear in games. For example,
On Fri, Apr 23, 2010 at 1:24 PM, Bayley, Alistair wrote:
Looks like the London HUG domain (londonhug.net) registration has
expired. Neil Bartlett was the registrant.
Neil: do you plan to renew?
The whois database reports:
Domain name: LONDONHUG.NET
This domain name is up for auction for a
Hi,
Does anyone know how to generate a text file in a Cabal package?
E.g. I want cabal to install a text file into $share_dir/applications/
app.desktop,
and fill in certain fragments of this file with paths depending of the
$share_dir variable.
Say:
==Yi.desktop
Hello fellow Haskell programmers,
I seem to be having problems with some threads of mine. I wrote an
OpenGL program that employs some threads (forkIO) in order to separate
any calculations from the OpenGL code. At first it all seemed to be
working just fine. Then I added some code for
The problem could be in your use of forkIO.
To quote the documentation of forkOS [1]:
Like forkIO, this sparks off a new thread to run the IO computation passed as
the first argument, and returns the ThreadId of the newly created thread.
However, forkOS creates a bound thread, which is
Hello Michał
You should be able to run arbitrary code during build/installation by
changing main in Setup.hs to use defaultMainWithHooks then supplying
your own UserHooks
main = defaultMainWithHooks my_hooks
my_hooks :: UserHooks
my_hooks = ...
Best wishes
Stephen
Hello fellow Haskell programmers,
I seem to be having problems with some threads of mine. I wrote an
OpenGL program that employs some threads (forkIO) in order to separate
any calculations from the OpenGL code. At first it all seemed to be
working just fine. Then I added some code for
Hello,
HaskellDB makes extensive use of Singleton Types, both in its original
version and the more recent one where it's using HList instead of the
legacy implementation.
I wonder if it is possible, not considering feasibility for the moment,
to implement HaskellDB *without* using Singleton
1) In FRP, there is no global *type* GameState that stores the whole
game state. Rather, the game state is implicit in the collection of
active computations. This is also why state updating and drawing is
woven together in FRP, which is good syntactically, but hard to
disentangle for
On Sun, Apr 25, 2010 at 6:34 AM, mitch...@kaplan2.com wrote:
Hi,
I’m just starting to learn, or trying to learn Haskell. I want to write a
function to tell me if a number’s prime. This is what I’ve got:
f x n y = if n=y
then True
else
if gcd x n ==
Yair Chuchem yair...@gmail.com writes:
I don't have a good working solution for this, so the situation will
have to remain status quo (i.e. clicking two installers) for now.
afaik you can make an mpkg installer that invokes/contains other
installers:
see
Hi Luke,
Your fix worked. Thanks very much. I guess I thought that x was local to
primeQ and when I called f, with y, it was just passing a value. As I was
this response to you, I realized that I'm also passing x itself, oops. So I
tried setting z=floor x, and passing z instead of x, and that
John,
Thanks, I didn't know it was there. I'll subscribe to it.
Mitchell
_
From: John Bender [mailto:john.m.ben...@gmail.com]
Sent: Sunday, April 25, 2010 3:01 AM
To: Luke Palmer
Cc: mitch...@kaplan2.com; haskell-cafe@haskell.org
Subject: Re: [Haskell-cafe] I
Hi Ivan,
I have read through parts of the tutorials, and also purchased Real World
Haskell - O'Reilly. It's not homework, if I were that young I might have
more patience with my progress.
Actually I going through the problems in ProjectEuler, and primarily using
Mathematica. But it's slow. I
Hi Daniel,
I haven't yet absorbed everything you've written. One thing though, I
didn't know how long division takes, but yeah, obviously gcd would take
longer.
Also when I put in the correction based on Luke's note, I found out about
the perfect square problem.
With regard to style, thanks
Hi David,
Thanks for the suggestion. I took a quick look at your article, and I'll
have to spend a little more time on it. Delicious Primes? Great name.
Also I appreciate your correct use of the phrase begging the question.
The common and incorrect use that I hear constantly is one of my pet
On Apr 25, 2010, at 10:53 , nc...@kent.ac.uk wrote:
Are you using the -threaded flag? This should be given to ghc when
compiling, and I guess also to ghci when interpreting. A few more
details
IIRC ghci is always -threaded.
--
brandon s. allbery [solaris,freebsd,perl,pugs,haskell]
John Goerzen schrieb:
My second example was the addition of instances to time.
My conclusion was: Never define orphan instances privately. If an
instance cannot be added to the packages that provide the associated
type or the class, then discuss the orphan instance with the maintainers
of the
Am Sonntag 25 April 2010 17:49:05 schrieb mitch...@kaplan2.com:
Hi David,
Thanks for the suggestion. I took a quick look at your article, and
I'll have to spend a little more time on it. Delicious Primes? Great
name.
And it's a good read.
I find this definition of prime numbers
On Sun, Apr 25, 2010 at 01:08, Jon Fairbairn jon.fairba...@cl.cam.ac.uk wrote:
John Millikin jmilli...@gmail.com writes:
This allows users to install the package, without installing 3rd-party
utilities, or downloading (possibly varying) versions from external
websites. As your library is
I'd be really interested; I have a lot of improvements I'd personally like
to make.
Louis Wasserman
wasserman.lo...@gmail.com
http://profiles.google.com/wasserman.louis
___
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
Actually, I believe that many Yampa examples do separate the drawing
from the update... The arrow provides the game data that *can* be
rendered. If you provide interpolators for that game data, you can
still achieve the same as is explained in fix your timesteps (in my
own FRP experiments I have
(in my own FRP experiments I have an update thread and a render thread).
I wonder how to nicely deal with state that requires communication with
the outer world, even though it is functional at heart. For instance, if
you want to change a vertex buffer or a texture or whatever during the
update,
Henning Thielemann schlepp...@henning-thielemann.de writes:
My conclusion was: Never define orphan instances privately. If an
instance cannot be added to the packages that provide the associated
type or the class, then discuss the orphan instance with the maintainers
of the type and the class
2010/4/25 Günther Schmidt gue.schm...@web.de:
Hello,
HaskellDB makes extensive use of Singleton Types, both in its original
version and the more recent one where it's using HList instead of the legacy
implementation.
I wonder if it is possible, not considering feasibility for the moment, to
lrpalmer:
2010/4/25 Günther Schmidt gue.schm...@web.de:
Hello,
HaskellDB makes extensive use of Singleton Types, both in its original
version and the more recent one where it's using HList instead of the legacy
implementation.
I wonder if it is possible, not considering feasibility
Hello Luke,
I mean something like
data FirstName = FirstName
data LastName = LastName
data BirthDate = BirthDate
ie.
data FirstName
data LastName
data BirthDate
In HaskellDB's case this is part of what's necessary to define
individual columns.
Another part is:
instance FieldTag
Ivan Lazar Miljenovic schrieb:
Henning Thielemann schlepp...@henning-thielemann.de writes:
My conclusion was: Never define orphan instances privately. If an
instance cannot be added to the packages that provide the associated
type or the class, then discuss the orphan instance with the
On Mon, Apr 26, 2010 at 06:47:27AM +1000, Ivan Lazar Miljenovic wrote:
My main problem with this is if you want a custom variant of that
instance. Let's take FGL graphs for example with instances for
QuickCheck's Arbitrary class. Maybe you want arbitrary graphs that are
simple, or maybe
It seems to me that there's a choice here between
(A) Full conformance to the letter of IEEE arithmetic
AND full conformance to the letter of Haskell total ordering
with consequent inconvenience:
don't make floats Ord
create new IEEE comparison operations for floats
(B)
On Sun, Apr 25, 2010 at 9:08 PM, Richard O'Keefe o...@cs.otago.ac.nz wrote:
It seems to me that there's a choice here between (...)
Nice! That's a very comprehensive summary of the situation regarding
issues of correctness. I do wonder, though, what (if any) are the
performance implications?
Since I've volunteered myself to help maintain/upgrade FGL, what do the
people in the community want to see happen with it?
Here are some ideas that I have regarding FGL:
* I had already started working on a new generic graph class [1] (with
initial draft at [2]) to act as a wrapper around
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