Just my two cents. The open source project Maxima is a very successful
math engine dedicated to solving ODE PDE and integration among many
other things. It is implemented in LISP.
Steve
On 4/21/09, jean-christophe mincke jeanchristophe.min...@gmail.com wrote:
Peter, Paul,
But my question is,
I recently got a CentOS server, but noticed that ghc rpm is not available
from CentOS yum. After investigation, I found ghc is in Fedora repository,
but does not make its way to EPEL, which yum on CentOS can use. (
http://download.fedora.redhat.com/pub/epel/5/x86_64/)
Is there any plan to get it
According to this discussion, none of the corporate email is okay for
open source mailing list.
Maybe you guys should join the Vioxx lawsuit team instead of Haskell cafe.
Or maybe Haskell's strictness has trained haskell programmers to
attend such details. That is really a good training for the
Oracle OCI interface is quite different between 7/8 and 9/10. And 10
is different from 9 in some respect. I don't know much about 11.
Oracle 10.2.0.3 is a stable release, but there are some major server
bugs in it, that Oracle had to release 10.2.0.4. I'd recommend Haskell
community to focus on
You may want to check this out.
http://www.orafaq.com/wiki/ODBC_FAQ#Where_can_one_get_ODBC_drivers_for_Oracle_and_Rdb.3F
As Oracle is a commercial company who is not interested in open source
historically, it is little chance that you will get robust software
for free -- from someone with many
Hi, Haskellers,
This email is only remotely connected to this list. Recently I am doing some
research on the fat tails (in fact, I simply bumped into it) on the stock
market. I came up with an equation which I think solves the fat tails --
which is really the Levy stable distribution. During the
Bug report:
I am using IE6. The Powered by bar at the bottom does not reposition as I
scroll down. So there is a small portion on the page always masked by the
Powered by bar.
Nice work. Great google-like speed...
Steve
On 4/8/08, Timo B. Hübel [EMAIL PROTECTED] wrote:
Hello,
thanks for
Related news --
Intel, Microsoft choose UC-Berkeley to host $10M parallel computing center
March 19, 2008 8:36 AM ET
http://news.moneycentral.msn.com/provider/providerarticle.aspx?feed=ACBJdate=20080319id=8361298
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Interesting to know people are looking for \where\. As a fairly new
Haskeller, I bumped into frequent indentation issues (if-then-else,
case, where, let, do, etc) and sometimes not sure where to place
\where\ properly. Maybe beginners are having problem with syntax
more than other things and they
Hi,
In John Hughes\' paper \Programming with arrows\ [1] Section 5, the
simulation arrow is defined (Sim). All the examples went well.
However, when I want to use it beyond circuit simulation and I added a
\if-then-else\ line, GHC is asking to define ArrowChoice for Sim.
Does anybody have the
Neil,
Would you consider adding auto-complete feature on Hoogle in the forth
coming release?
http://wiki.script.aculo.us/scriptaculous/show/Ajax.Autocompleter
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You can try aggressive caching and indexing (which google uses often)
based on 20-80 rule.
http://en.wikipedia.org/wiki/Pareto_principle
On Thu, Feb 28, 2008 at 7:49 PM, Neil Mitchell [EMAIL PROTECTED] wrote:
Hi Steve,
Would you consider adding auto-complete feature on Hoogle in the forth
System.IO.Unsafe 81
9 Foreign 74
10 Data.Map 68
Steve
On Sat, Feb 23, 2008 at 5:25 PM, Ross Paterson [EMAIL PROTECTED] wrote:
On Sat, Feb 23, 2008 at 10:59:40AM -0500, Steve Lihn wrote:
I parsed through all the hackagedb
modules. I also added the display of repository source (ghc, hdb
There's a link on the HackageDB Introduction page that gets you the
latest versions of all packages (30MB).
Ross,
Thanks for the archive URL. I parsed through all the hackagedb
modules. I also added the display of repository source (ghc, hdb) and
package source. HackageDB is 3-4 times bigger
fmap (^4) [1,2,3] = \i - shows i
gives
1 16 81
You are in the list comprehension in a monadic expression. shows is
called three times (i is int).
then why does
let i = fmap (^4) [1,2,3] in shows i
give
[1,16,81]
shows is called once (i is a list).
I proudly announce a little toy that lists the frequency of modules
being imported by other modules. Do you know Control.Monad is the most
frequently imported module? I did not!
Currently it only includes GHC 6.8 core library. If you have any idea
how to parse through HackageDB code, please let
If ~ does not have any special meaning and it could be ### or xyz,
then how does GHC know to print
a ~ b, but not ~ a b
a ### b, but not ### a b
xyz a b, but not a `xyz` b
Simply because xyz is alphanumeric?
On Wed, Feb 20, 2008 at 12:34 AM, David Menendez [EMAIL PROTECTED] wrote:
On Feb
While I am reading TypeCompose module, I am having trouble finding
where ~ comes from? (And its son ~~ and grandson ~~~, etc.) This
is my immediate question. Help is appreciated.
A bigger (higher-order?) issue I encountered and I think other people
could also have is to look up all these special
1. Stream
This is actually a comonad.
Something more to learn everyday.
Here's another fun arrow:
http://luqui.org/blog/archives/2007/09/06/quantum-entanglement-in-haskell/
Luke
Luke,
I managed to get your quantum entanglement examples working. But
honestly, I can't quite figure out
And in perl CPAN world, there are bundles that put together related
packages in one big install... Maybe there can be Cabal bundles.
Just an idea!
On Feb 12, 2008 2:03 PM, Don Stewart [EMAIL PROTECTED] wrote:
Ok, I'll leave it up there as a separate package then. :)
-- Don
hitesh.jasani:
In John Hughes' paper [1], Programming with Arrows, p. 20,
The truly interesting arrow types are those which do not
correspond to a monad, because it is here that arrows give us real
extra generality.
Since we know that stream functions cannot be represented as a monad,
then they are one of these
A new experimental package, Finance-Treasury, has been uploaded to
hackage. It automates the fetching of Treasury's daily yield curve
data (XML) and translates the data into Data.Map representation. The
collection of historical data can go back to 1992.
I want to raise this issue again since I disagreed (see quoted text
below) that cabal-install can solve the problem of moving from one
version to another completely.
For most /pure/ packages, it is probably true. But for those packages
that have external depedencies, this is hardly so. For
Suggestion: a binding to Expat, like perl and python did.
So this is a request for an xml-light based on lazy bytestrings, designed
for speed at all costs?
-- Don
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Duncan,
I got the latest cabal. The stack overflow is fixed. But the install
command still does not work (on a very simple package). Attached is
the verbose output. It does not like to proceed somewhere between
configure and build. But the verbose is not telling why!
I also attached my cabal
This fixed the second example. Thanks.
I think handleConnection should be
handleConnection :: RequestHandler - Handle - IO ()
handleConnection r h =
handleToRequest h = responseSend h . runRequestHandler r
Levi
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and
inserting -fglasgow-exts pragmas), darcs-pushed, and put a new version (0.3)
on hackage. Please give it another try.
Cheers, - Conal
On Jan 18, 2008 7:58 PM, Steve Lihn [EMAIL PROTECTED] wrote:
Tried to install reactive-0.2 on GHC-6.6, but failed.
Building reactive-0.2...
src
On Jan 19, 2008 9:18 AM, Duncan Coutts [EMAIL PROTECTED] wrote:
I think you're just missing a --user:
$ cabal install --prefix=$HOME --user foo
The prefix can also be set in the $HOME/.cabal/config file.
Syntax? Something like: prefix: /path/to/my/ghc ?
BTW, In the development
Just tried to test drive another feature and got the nasty error:
cabal list
Stack space overflow: current size 8388608 bytes.
Use `+RTS -Ksize' to increase it.
On Jan 19, 2008 9:27 AM, Steve Lihn [EMAIL PROTECTED] wrote:
On Jan 19, 2008 9:18 AM, Duncan Coutts [EMAIL PROTECTED] wrote
Hi,
It appears some of the latest hackages are moving towards 6.8 to take
advantage of the new features, while quite a few remains at 6.6. The
compatibility between the two versions has been problematic. I only
have 6.6 installed, but now thinking to add 6.8 to my account (so I
can switch between
-- | @'forever' act@ repeats the action infinitely.
forever :: (Monad m) = m a - m ()
forever a = a forever a
Great. The code compiled successfully by inserting this in various places.
I'm wondering how hard to try to get these libs to work with both 6.6 and
6.8. My hope has been
Hi,
I just got cabal-install working. However, I have a problem using it.
My GHC is installed in a user-specific location, so when I do the
Cabal dance, I have to specfiy Setup configure --prefix=$HOME/ghc.
Now with cabal install, I can not figure out where to specify the
--prefix. Cabal always
Tried to install reactive-0.2 on GHC-6.6, but failed.
Building reactive-0.2...
src/Data/Reactive.hs:1:13: cannot parse LANGUAGE pragma
Is the package for GHC 6.8? Is there an older version (0.0?) for GHC
6.6 that I can play with your example? (Or advise how to hack that
file to get it work on
For mysql (via HDBC),some documentation is available here. But it is
rather going through HDBC-ODBC-mysql. It is a bit complex than you
would normally expect with mysql.
http://en.wikibooks.org/wiki/Haskell/Database
2008/1/15 Justin Bailey [EMAIL PROTECTED]:
2008/1/15 Immanuel Normann [EMAIL
Hi,
In perl scripts (unix), one can do
==
#!/usr/local/bin/perl
BEGIN {
$ENV{LD_LIBRARY_PATH} = ...;
}
do my perl stuff
==
The setting of ENV variable before the program runs allows me to fix
the shell environments. In this case, I need to specify where to look
for the shared library.
How do
I have started documenting the Database Wikibook, in particular, about
HDBC. It is still very rough at this time, but something is better
than nothing :-) If you want to add more content, certainly welcome!
http://en.wikibooks.org/wiki/Haskell/Database
On 1/2/08, Jeff Polakow [EMAIL PROTECTED]
What you described has a Java parallel:
In the first program, I am reading on-demand from a database - just
reading, not making any changes.
This is similar to EJB's entity bean. Usually EJB requires XA driver
to preserve database state across the cluster, but in your read-only
case, this is
Just curious -- how can this be done in Arrows instead of Manad/T? Or can it?
On Dec 26, 2007 6:42 AM, Benja Fallenstein [EMAIL PROTECTED] wrote:
On Dec 23, 2007 1:44 PM, Isaac Dupree [EMAIL PROTECTED] wrote:
parseHeader3 :: BS.ByteString - Maybe (Int, Int)
parseHeader3 bs = do
(x,
, Bjorn Buckwalter [EMAIL PROTECTED] wrote:
Steve Lihn stevelihn at gmail.com writes:
I do come aross a question while reading the DSL page on Wikipedia.
http://en.wikipedia.org/wiki/Domain-specific_programming_language
In the Disadvantage section (near the end), there is an item -- hard
I have a hoogle question. While I was reading the HXT discussion
(below), I tried to search runX and readString in Hoogle (since I
am new to HXT and Arrows). But neither search yielded any result and I
had to use google to find the Haskell docs.
So I am wondering what is the scope of Hoogle that
Thanks for the explanation on DSL. It helped me understand how Haskell
works compared to other popular languages out there. It is a
programming methodology change. Or what is called paradigm change on
how to design a software with Haskell.
Haskell has its general-purpose features. Yet its
On Dec 11, 2007 11:16 PM, Don Stewart [EMAIL PROTECTED] wrote:
2. It offers strong support for integration with other languages and
tools
(FFI? Is the support strong?)
2. The FFI in Haskell is perhaps the most powerful out there.
You can import C or export Haskell to C
I have not used Haskell to write large scale program, but I am
certainly interested to know the answer to these questions.
Can Haskell offer the following as Pythoner boasts?
1. can be used for many kinds of software development. (some may argue yes,
but different kinds from what python is good
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