Hi,
Once upon a time, I proposed a GSoC project for a machine learning
library.
I still get some email from prospective students about this, whom I
discourage as best I can by saying I don't have the time or interest to
pursue it, and that chances aren't so great since you guys tend to
prefer
Don Stewart d...@galois.com writes:
I notice that posts from the Haskell elders are pretty rare now. Only
every now and then we hear from them.
I'm not sure who the 'elders' are, but generally grown-ups with a day
time job (professorships, say) tend to be busy people, without much time
for
The shootout (sorry, Computer Language Benchmarks Game) recently updated
to GHC 6.12.1, and many of the results got worse. Isaac Gouy has added
the +RTS -qg flag to partially fix it, but that turns off the parallel
GC completely and we know that in most cases better results can be had
by
Jason Dagit:
The reason I started telling everyone to avoid GHC in apt was the way
it was packaged. [..]
If they are lucky they figure out which apt package to install.
I think people who are too lazy to bother to find out how their
distribution works, should avoid any distribution.
%
Ketil Malde ke...@malde.org writes:
I think people who are too lazy to bother to find out how their
distribution works, should avoid any distribution.
% apt-cache search foo
% sudo apt-get install libghc6-foo\*
Agreed (to the extent that someone who can't be bothered figuring out an
Richard O'Keefe o...@cs.otago.ac.nz wrote:
I grant you that driving cars is recent (:-) (:-)!
And shoes! Never leave home with them. Well, at least spring till fall.
--
(c) this sig last receiving data processing entity. Inspect headers
for copyright history. All rights reserved. Copying,
Ivan Miljenovic wrote:
The Haskell Platform is supposed to be a development environment...
No-one ever said it was a _complete_ development environment and that
you'd never need any other libraries, tools, etc.
On http://hackage.haskell.org/platform/contents.html, someone wrote:
The Haskell
Tillmann Rendel ren...@informatik.uni-marburg.de writes:
On http://hackage.haskell.org/platform/contents.html, someone wrote:
The Haskell Platform is a comprehensive, robust development
environment for programming in Haskell. For new users the platform
makes it trivial to get up and running
.
2010/3/29 Jason Dusek jason.du...@gmail.com
2010/03/29 Alberto G. Corona agocor...@gmail.com:
[...] What we evolved with is a general hability: to play with
things to achieve what we need from them, (besides other
abilities). The pleasure to acheve ends by using available
means. [...]
I'm not able to log in to Trac to update these proposals at the moment
so I'll add some notes here for now.
On 3/15/10, Johan Tibell johan.tib...@gmail.com wrote:
A high-performance HTML combinator library using Data.Text
http://hackage.haskell.org/trac/summer-of-code/ticket/1580
Being
Hi Ivan.
Excerpts from Ivan Miljenovic's message of Ter Mar 30 00:01:19 -0300 2010:
On 30 March 2010 13:55, Jason Dagit da...@codersbase.com wrote:
(...)
[..] now trying to profile something, oh wait, some problem again.
Agreed, if Debian didn't include the profiling libraries with GHC
And Dan Piponi has a nice collection of blogposts about this topic, for which
he has just created an overview:
http://blog.sigfpe.com/2010/03/partial-ordering-of-some-category.html
greetings,
Sjoerd
On Mar 29, 2010, at 8:29 PM, Edward Kmett wrote:
One place to start might be category-extras
The haskell platform should take care of a lot of installation pain,
specially for the non-technical users. A new version is due to be release
pretty soon (somewhere begin april). It has Mingw and Msys included, and
also some pre-built binaries like cabal and haddock. It should be possible
for a
On Tue, Mar 30, 2010 at 4:13 AM, Alberto G. Corona agocor...@gmail.comwrote:
.
2010/3/29 Jason Dusek jason.du...@gmail.com
2010/03/29 Alberto G. Corona agocor...@gmail.com:
[...] What we evolved with is a general hability: to play with
things to achieve what we need from them, (besides
Hi Jason and other,
thanks for the suggestions, the Debian Haskell Team is eager to learn
why people do or don’t use the packaged libraries.
Am Dienstag, den 30.03.2010, 14:01 +1100 schrieb Ivan Miljenovic:
On 30 March 2010 13:55, Jason Dagit da...@codersbase.com wrote:
[..] now trying to
On Tue, Mar 30, 2010 at 2:07 AM, Joachim Breitner
m...@joachim-breitner.de wrote:
I’m a computer science student in Germany and I’d like to spend one
semester as an exchange student in India. I have no specific plans yet
where I want to go, and I’m wondering if there are universities in India
Joachim Breitner nome...@debian.org writes:
The profiling data is put in -prof packages, i.e. ghc-prof,
libghc6-network-prof etc. Indeed, there is no easy way to tell the
package system: Whenever I install a Haskell -dev package, please
install the -prof package as well.
One option might to
Simon Marlow wrote:
We really need to tune the flags for these benchmarks properly.
Do I sense the hidden hand of Goodharts law? :)
-- http://en.wikipedia.org/wiki/Goodhart's_law
#g
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I tried to devise a C preprocessor, but then I figured out that I
could write something like that:
---
#define A(arg) A_start (arg) A_end
#define A_start this is A_start definition.
#define A_end this is A_end definition.
A (
#undef A_start
#define A_start A_end
)
Don Stewart d...@galois.com writes:
Live from (post-) Zurihac, I'm pleased to announce the 2010.1.0.0 (beta
branch)
release of the Haskell Platform, supporting GHC 6.12.
http://hackage.haskell.org/platform/
The Haskell Platform is a comprehensive, robust development environment for
Alexandru Scvortov wrote:
I'm thinking of writing a library for
analyzing/generating/manipulating JVM
bytecode. To be clear, this library would allow one to load and work with JVM
classfiles; it wouldn't be a compiler, interpretor or a GHC backend.
You might be interested in
On 30 March 2010 18:55, Serguey Zefirov sergu...@gmail.com wrote:
Other than that, C preprocessor looks simple.
Ah no - apparently anything but simple.
You might want to see Jean-Marie Favre's (very readable, amusing)
papers on subject. Much of the behaviour of CPP is not defined and
often
On a suggestion from Ketil Maede, the listed mentor for the Google
Summer of Code Machine Learning Project on Hackage, I am sending this
email as an interested student. The listed mentor is busy
unfortunately :D.
Are there people on the list interested in mentoring this project?
Apparently, the
Stephen Tetley stephen.tet...@gmail.com wrote:
Much of the behaviour of CPP is not defined and often inaccurately
described, certainly it wouldn't appear to make an ideal one summer,
student project.
If you get
http://ldeniau.web.cern.ch/ldeniau/cos.html
to work, virtually everything else
(sorry for the dupe aaron! forgot to add haskell-cafe to senders list!)
Perhaps the best course of action would be to try and extend cpphs to
do things like this? From the looks of the interface, it can already
do some of these things e.g. do not strip comments from a file:
Edward Kmett wrote:
Of course, you can argue that we already look at products and coproducts
through fuzzy lenses that don't see the extra bottom, and that it is
close enough to view () as Unit and Unit as Void, or go so far as to
unify Unit and Void, even though one is always inhabited and
Quoting Ashley Yakeley ash...@semantic.org:
data Nothing
I avoid explicit undefined in my programs, and also hopefully
non-termination. Then the bottomless interpretation becomes useful,
for instance, to consider Nothing as an initial object of Hask
particularly when using GADTs.
Hi,
I'd like to introduce my idea for the Haskell GSOC of this year. In
fact, you already know about it, since I've talked about it here on
the haskell-cafe, on my blog and on reddit (even on #haskell one day).
Basically, what I'm trying to do is a new debugger for Haskell, one
that would be
Ashley Yakeley wrote:
Edward Kmett wrote:
Of course, you can argue that we already look at products and
coproducts through fuzzy lenses that don't see the extra bottom, and
that it is close enough to view () as Unit and Unit as Void, or go so
far as to unify Unit and Void, even though one is
wagne...@seas.upenn.edu wrote:
Forgive me if this is stupid--I'm something of a category theory
newbie--but I don't see that Hask necessarily has an initial object in
the bottomless interpretation. Suppose I write
data Nothing2
Then if I understand this correctly, for Nothing to be an
dekudekup...@yahoo.com (Benjamin L. Russell) writes:
Sorry for the late response, but just out of curiosity, are there any
plans to provide a binary installer for either the Haskell Platform or
GHC 6.12.1 for Mac OS X Leopard for the PowerPC CPU (as opposed to for
the Intel x86 CPU)? I just
I'd be very much interested in working on this library for GSoC. I'm
currently working on an idea for another project, but I'm not certain
how widely beneficial it would be. The preprocessor and
pretty-printing projects sound especially intriguing.
On Tue, Mar 30, 2010 at 1:30 PM, Aaron Tomb
Yes, that would definitely be one productive way forward. One concern
is that Language.C is BSD-licensed (and it would be nice to keep it
that way), and cpphs is LGPL. However, if cpphs remained a separate
program, producing C + extra stuff as output, and the Language.C
parser understood
The uniqueness of the definition of Nothing only holds up to isomorphism.
This holds for many unique types, products, sums, etc. are all subject to
this multiplicity of definition when looked at through the concrete-minded
eye of the computer scientist.
The mathematician on the other hand can
Very true. I oversimplified matters by mistake.
One question, I suppose, is does seq distinguish the arrows, or does it
distinguish the exponential objects in the category? since you are using it
as an object in order to apply seq, and does that distinction matter? I'd
hazard not, but its curious
On 19:54 Tue 30 Mar , Stephen Tetley wrote:
On 30 March 2010 18:55, Serguey Zefirov sergu...@gmail.com wrote:
Other than that, C preprocessor looks simple.
Ah no - apparently anything but simple.
I would describe it as simple but somewhat annoying. This means that
guessing at its
That's very good to hear!
When it comes to preprocessing and exact printing, I think that there
are various stages of completeness that we could support.
1) Add support for parsing comments to the Language.C parser. Keep
using an external pre-processor but tell it to leave comments in
I would like to write an audio interface for haskell for GSoC. The
idea is to have a simple frontend (possibly an analog to the IO
'interact' function) that would permit writing simple functions to
process audio. The interface would permit easy usage of various audio
APIs on various platforms to
On Tue, Mar 30, 2010 at 7:30 PM, Aaron Tomb at...@galois.com wrote:
Hello,
I'm wondering whether there's anyone on the list with an interest in doing
additional work on the Language.C library for the Summer of Code. There are
a few enhancements that I'd be very interested seeing, and I'd love
I've finally released my priority queue package, pqueue, on Hackage. This
is the direct result of my efforts to design a priority queue for
containers, but instead, I decided to put together this package and submit
it for addition to the Haskell Platform. There's already been a huge
discussion
Getting back to the question, whatever happened to empty case
expressions? We should not need bottom to write total functions from
empty types.
Correspondingly, we should have that the map from an empty type to
another given type is unique extensionally, although it may have many
On Mar 30, 2010, at 3:16 PM, Tom Hawkins wrote:
On Tue, Mar 30, 2010 at 7:30 PM, Aaron Tomb at...@galois.com wrote:
Hello,
I'm wondering whether there's anyone on the list with an interest
in doing
additional work on the Language.C library for the Summer of Code.
There are
a few
I believe I was claiming that, in the absence of undefined, Nothing
and Nothing2 *aren't* isomorphic (in the CT sense).
But this is straying dangerously far from Ashley's point, which I
think is a perfectly good one: Hask without bottom is friendlier than
Hask with bottom.
~d
Quoting
wagne...@seas.upenn.edu wrote:
I believe I was claiming that, in the absence of undefined, Nothing and
Nothing2 *aren't* isomorphic (in the CT sense).
Well, this is only due to Haskell's difficulty with empty case
expressions. If that were fixed, they would be isomorphic even without
On Tue, Mar 30, 2010 at 11:26:39PM +0100, Conor McBride wrote:
Getting back to the question, whatever happened to empty case expressions? We
should not need bottom to write total functions from empty types.
Empty types? Toto, I've a feeling we're not in Haskell anymore.
I use the dreaded unsafePerformIO for a few functions in my graphviz
library (
http://hackage.haskell.org/packages/archive/graphviz/2999.8.0.0/doc/html/src/Data-GraphViz.html
). However, a few months ago someone informed me that the
documentation for unsafePerformIO had some steps that should be
On Tue, Mar 30, 2010 at 5:14 PM, Aaron Tomb at...@galois.com wrote:
That's very good to hear!
When it comes to preprocessing and exact printing, I think that there are
various stages of completeness that we could support.
1) Add support for parsing comments to the Language.C parser. Keep
Of course Haskell' should have an empty case. As soon as empty data
declarations are allowed then empty case must be allowed just by using
common sense.
On Tue, Mar 30, 2010 at 11:03 PM, Ashley Yakeley ash...@semantic.org wrote:
wagne...@seas.upenn.edu wrote:
I believe I was claiming that, in
See http://trac.haskell.org/haskell-platform/wiki/AddingPackages
Cheers,
Johan
On Mar 31, 2010 5:21 AM, Louis Wasserman wasserman.lo...@gmail.com
wrote:
I've finally released my priority queue package, pqueue, on Hackage. This
is the direct result of my efforts to design a priority queue for
Apologies if this request isn't 'appropriate' for this venue (perhaps
it's a Haskell' request and/or has been discussed before)...
I'd like it if there were a Data.Graph in the base libraries with
basic graph-theoretic operations. Is this something that's been
discussed?
For now, it
Sorry for the duplicate email Lee, but I somehow forgot to CC the
mailing list :s
On 31 March 2010 13:12, Lee Pike leep...@gmail.com wrote:
I'd like it if there were a Data.Graph in the base libraries with basic
graph-theoretic operations. Is this something that's been discussed?
I'm kinda
Stephen Tetley wrote:
Much of the behaviour of CPP is not defined and
often inaccurately described, certainly it wouldn't appear to make an
ideal one summer, student project.
But to give Language.C integrated support for preprocessing, one needn't
implement CPP. They only need to implement the
Hi, I hope that this is an appropriate place to post this question; I
initially posted to Haskell-beginners since that seemed appropriate to
my knowledge level. Brent Yorgey kindly suggested I should post here
instead.
Just for a little background: I'm an experienced computer scientist and
which is a variation of the question, why can't I compare localtimes ?
or am I missing something in Time (yet again).
Thanks,
Brian
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Two values of LocalTime may well be computed with respect to different
timezones, which makes the operation you ask for dangerous. First
convert to UTCTime (with localTimeToUTC), then compare.
Cheers,
~d
Quoting bri...@aracnet.com:
which is a variation of the question, why can't I compare
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