On Mon, 10 Jul 2006, Donn Cave wrote:
After reasonable success with an FFI exercise, I have run into a
typing issue that has me stuck.
The foreign software is a C plotting library that my colleagues
use, really simple and mostly quite amenable to Haskell-ization.
The one fly in the
Hi Lemmih,
Have you tried profiling the code?
You can find a guide to profiling with GHC here:
http://www.haskell.org/ghc/docs/latest/html/users_guide/profiling.html
I did that ... it shows that updateState is retaining most data (-hr
switch), as well as updateMap, which is increasing it's
Bulat Ziganshin wrote:
numerical speed is poor in ghc 6.4, according to my tests. it's 10-20
times worse than of gcc. afair, the mandelbrot benchmark of Great
Language Shootout proves this - despite all optimization attempts,
GHC entry is still 5-10 times slower than gcc/ocaml/clean ones
We
Hello Donn,
Monday, July 10, 2006, 11:03:32 AM, you wrote:
plot :: GraphIntInt - [CLLong] - [CLLong] - IO ()
plot :: GraphIntFloat - [CLLong] - [CDouble] - IO ()
plot :: GraphFloatInt - [CDouble] - [CLLong] - IO ()
plot :: GraphFloatFloat - [CDouble] - [CDouble] - IO ()
Hello Donald,
Monday, July 10, 2006, 11:48:48 AM, you wrote:
Anyone rememeber what the result of the let's get split into the base
library movement's work was?
it will be even better to ask permission from John Goerzen and move to
Data.List the whole stringlist beastiary from MissingH
--
Hi, I'm trying to build HSQL, in order to use HaskellDb. The base
directory (i.e. HSQL) builds ok, as per instructions, but the PostgreSQL
directory fails with the error message:
Setup.lhs:17:71:
Couldn't match `PackageDescription' against `LocalBuildInfo'
Expected type: Args -
Henning Thielemann wrote:
On Mon, 10 Jul 2006, Donn Cave wrote:
After reasonable success with an FFI exercise, I have run into a
typing issue that has me stuck.
The foreign software is a C plotting library that my colleagues
use, really simple and mostly quite amenable to Haskell-ization.
The
Hi, I'm having problems using HDBC-postgresql (I've tried both 0.99.2.1
and 1.0.0.0) with postgresql (version 8.1.4, installed in /share/pgsql).
I adjust the include-dir and extra-lib-dirs to use the custom location
of postgresql, and build: no error messages, everything seems fine.
However,
Hello Simon,
Monday, July 10, 2006, 1:12:13 PM, you wrote:
numerical speed is poor in ghc 6.4, according to my tests. it's 10-20
times worse than of gcc. afair, the mandelbrot benchmark of Great
Language Shootout proves this - despite all optimization attempts,
GHC entry is still 5-10 times
Hello haskell-cafe,
i plan to write sometimes a Haskell performance tutorial. am i
correctly understand that i can include contents of existing haskell
wiki pages as long as tutorial will be published only on haskell wiki?
--
Best regards,
Bulat mailto:[EMAIL
Hi
i plan to write sometimes a Haskell performance tutorial. am i
correctly understand that i can include contents of existing haskell
wiki pages as long as tutorial will be published only on haskell wiki?
http://haskell.org/haskellwiki/HaskellWiki:Copyrights
As far as I can tell, you are
bulat.ziganshin:
Hello Simon,
Monday, July 10, 2006, 1:12:13 PM, you wrote:
numerical speed is poor in ghc 6.4, according to my tests. it's 10-20
times worse than of gcc. afair, the mandelbrot benchmark of Great
Language Shootout proves this - despite all optimization attempts,
GHC
Simon Marlow schrieb:
Donald Bruce Stewart wrote:
Hacking up your own custom split (or a tokens/splitOnGlue) must be one
of the most common questions from beginners on the irc channel.
Anyone rememeber what the result of the let's get split into the base
library movement's work was?
On Mon, 10 Jul 2006, David Roundy wrote:
class Vec v where
(.+.) :: v - v - v
instance Vec [Double] where
xs .+. ys = zipWith (+) xs ys
instance Vec Double where
x .+. y = x + y
P.S. This is with ghc 6.4.1. And oddly enough, if you make the instance
instance Num a =
The problem isn't with lists specifically, but with any instance that
applies types (rather than type variables) to a type constructor
From section 4.3.2 of The Haskell 98 Report: The type (T u1 ... uk)
must take the form of a type constructor T applied to simple type
variables u1, ... uk.
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Spencer Janssen
The problem isn't with lists specifically, but with any instance that
applies types (rather than type variables) to a type constructor
From section 4.3.2 of The Haskell 98 Report: The type (T u1 ... uk)
must
On 7/10/06, Bayley, Alistair [EMAIL PROTECTED] wrote:
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Spencer Janssen
The problem isn't with lists specifically, but with any instance that
applies types (rather than type variables) to a type constructor
From section 4.3.2
David Roundy wrote:
I'm sure I'm missing something lame here, but can someone tell me why
we apparently can't declare a list to be an instance of a class in
Haskell 98?
I think it is a feature of H98 intended to disallow any
possibility of overlapping instances. If you have...
On 10/07/06, Sebastian Sylvan [EMAIL PROTECTED] wrote:
Double is not a type variable.
I.e. [a] is okay, but [Double] isn't.
--
-David House, [EMAIL PROTECTED]
___
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
I am a haskell-beginner and I wish to write a Forth-like interpreter.
(Only for practice, no usefulness.)
I would like use a list (as stack) that can contain several kinds of values.
data Element = Int Int | Float Float | Func : Machine - Machine | ...
Now I would like to have this type be
Hi,
you can make every function being an instance of class Show,
this works for me:
instance Show (a - b) where
show _ = FUNCTION
data Element = Int Int | Float Float | Func (Machine - Machine)
deriving Show
David
Johan Grönqvist wrote:
I am a haskell-beginner and I wish to write a
On Jul 10, 2006, at 2:57 AM, Martin Percossi wrote:
Hi, I'm trying to build HSQL, in order to use HaskellDb. The base
directory (i.e. HSQL) builds ok, as per instructions, but the
PostgreSQL directory fails with the error message:
Setup.lhs:17:71:
Couldn't match `PackageDescription'
Johan Grönqvist wrote:
I would like use a list (as stack) that can contain several kinds of values.
data Element = Int Int | Float Float | Func : Machine - Machine | ...
Now I would like to have this type be an instance of the class Show, so
that I can see what the stack contains in
On 2006-07-10, Martin Percossi [EMAIL PROTECTED] wrote:
Hi, I'm having problems using HDBC-postgresql (I've tried both 0.99.2.1
and 1.0.0.0) with postgresql (version 8.1.4, installed in /share/pgsql).
I adjust the include-dir and extra-lib-dirs to use the custom location
of postgresql, and
On Mon, Jul 10, 2006 at 02:26:23PM +0200, Christian Maeder wrote:
Our current (special) version is:
{- |
A function inspired by the perl function split. A list is splitted
on a seperator element in smaller non-empty lists.
The seperator element is dropped from the resulting list.
-}
johan.gronqvist:
I am a haskell-beginner and I wish to write a Forth-like interpreter.
(Only for practice, no usefulness.)
I would like use a list (as stack) that can contain several kinds of values.
data Element = Int Int | Float Float | Func : Machine - Machine | ...
Now I would
On Jul 10, 2006, at 8:44 AM, Johan Grönqvist wrote:
deriving Show is impossible as Func is not instance of Show. Can I make it instance of Show? I just want to define something like
...
and I am not interested in actually displaying any information about the function, ...
Were you interested in
On Jul 10, 2006, at 4:23 AM, Donald Bruce Stewart wrote:
Ah! In this case, on the debian, the benchmark has been compiled
_without_ -fexcess-precision, that's what's causing the big slow down.
We had to turn it on, on the gp4, but it seems the flag wasn't
propagated to the debian/sempron builds
Quoth Henning Thielemann [EMAIL PROTECTED]:
...
| Will you make that plotter wrapper public?
Why not - I don't expect it's going to be big news in the computing world,
but it's easy to set the files up.
See http://staff.washington.edu/donn/ezp/hsezp.html
Thanks to Bulat for the tip on
29 matches
Mail list logo
