On 05/13/2012 03:13 AM, Felipe Almeida Lessa wrote:
> Truly amazing! I wonder it would fare with larger repositories. =)
It does not scale well. I have not looked into optimization at all. For
example the algorithm to compute the transitive reduction is very naive
and brute force.
Somehow related
Hi all!
Yesterday I wrote a little tool to output the dependencies of darcs
patches in dot format. The hardest part was to wrap my head around the
darcs API and find a way to let it compute the patch dependencies. I
don't know, if I got it right, but it looks correct at first glance.
Here is the
That's great! I think, it would be useful to include the version of the
shipped gcc (where applicable). Would that be complicated to add?
For windows, I looked them up once:
2011.4.0.0 - 4.5.0
2011.2.0.1 - 4.5.0
2011.2.0.0 - 4.5.0
2010.2.0.0 - 3.4.5
Cheers,
Sönke
Simon Heng
name
clashes.)
Sönke
Sönke Hahn wrote:
> Hi all!
>
> string-conversions is a very simple package to facilitate dealing with
> different string types. It provides a simple type class that allows you to
> convert between values of different string types. It also provides type
>
Michael Snoyman wrote:
> I'm the author of convertible-text, and I consider it deprecated (it's
> marked as such in the synopsis).
>
> As far as string-conversions, I'm a little concerned that it's using
> decodeUtf8, which can throw exceptions from pure code for invalid UTF8
> sequences. I would
Hi Joachim!
Joachim Breitner wrote:
> you could elaborate the documenatation “Assumes UTF-8” – I guess this
> only applies to the two ByteString variants, as String and Text _should_
> contain unicode codepoints and no encoding. Not that someone tries to
> use a String where each Char corresponds
Hi all!
string-conversions is a very simple package to facilitate dealing with
different string types. It provides a simple type class that allows you to
convert between values of different string types. It also provides type
synonyms for these string types.
Supported types are:
- String
- St
Tony Morris wrote:
> Pointed f => Pointed (StateT s f)
>
> but not
>
> Applicative f => Applicative (StateT s f)
I see. So StateT cannot be what you could call an applicative transformer.
(Unlike for example ReaderT.)
Thanks.
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Hi!
I was reading through the Typeclassopedia ([1]) and I was wondering which
type could be an instance of Pointed, but not of Applicative. But I can't
think of one. Any ideas?
Sönke
[1] http://www.haskell.org/haskellwiki/Typeclassopedia
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Sönke Hahn wrote:
> There is a related bug report in ghc's trac: [1]. According to that, you
> could try to remove the "-fvia-C" flag to prevent ghc from using the C
> backend. (I had no luck with that, so I guess there is still another bug
> lurking.)
Just FYI:
I trie
epsilonhalbe wrote:
> hey haskellers,
> i'm fresh into haskell and love it. so to do faster easier haskell i
> wanted to install lambdabot but had to face some errors - i don't
> understand them at all
> here is some error output from zsh:
>
> http://hpaste.org/46401/bot_install_error
>
> can an
Roel van Dijk wrote:
> On 24 April 2011 01:49, wren ng thornton wrote:
>> I would *love* there to be a tool which (a) automatically saves failing
>> QuickCheck values to disk, and (b) automates using HUnit to load those in
>> and test them. I'm not so sure that QuickCheck should be doing the seco
Hi!
I would like to have a library that would allow to use QuickCheck in the
normal manner, but it would save test data for failing properties on the
filesystem (maybe using the shiny new acid-state?). On consecutive test
runs, the saved test data would be used first (before generating new
arb
Hi all!
The next Berlin Haskell Meeting will be next wednesday:
Date: Wednesday, April 27th
Time: from 20:00
Location: c-base, Rungestrasse 20, 10179 Berlin
I hope, this is not on too short notice.
Cheers,
Sönke
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Haskell-
Hi all!
I haven't tried the tool myself, but it seems interesting to the Haskell
efforts to compile to JavaScript:
http://syntensity.blogspot.com/2011/04/emscripten-10.html
Cheers,
Sönke
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Hi all!
It's been some time since the last Berlin Haskell Meeting, but we're doing it
again:
Date: Wednesday, March 30th
Time: from 20:00
Location: c-base, Rungestrasse 20, 10179 Berlin
If you're in Berlin and interested in Haskell, save the date!
Cheers,
Sönke
John Lask wrote:
> I have noticed that on my windows box and ghc 6.12.3 I get the return
> list for System.Direcotry.getDirectoryContents in reverse sorted order.
> This is a change from previous observed behavior and I would consider it
> a bug. I would like to verify that it is not just me.
I t
Erik de Castro Lopo wrote:
> Jonathan Geddes wrote:
>
>
>
>> So, am I missing the benefits of TDD in my Haskell code?
>
> Probably. I work on a project which has 4+ lines of
> haskell code (a compiler written in haskell) and has a huge
> test suite that is a vital to continued development.
On Thursday, December 30, 2010 06:50:32 pm Neil Mitchell wrote:
> Hi Sönke,
>
> I've just released cmdargs-0.6.6 which supports helpArgs [groupname
> "Something"]
That was fast! Thanks a lot, works like a charm.
Thanks,
Sönke
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> That i18n is a fantastic argument - and one that really means cmdargs
> has no choice but to support all the attributes on help/version.
Is it possible to change the "groupname" for the implicit "help" and "version"
options? I have defined some options with groupname "development flags", but I
Hi!
If you write a cabal setup script with user hooks, is there a way to tell
cabal-install that the setup script itself depends on some package from
hackage? (The dependency would be cabal-macosx in my case.)
Thanks,
Sönke
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The Berlin Haskell meeting is due again:
Date: Tuesday, December 7th
Time: from 20:00
Location: c-base, Rungestrasse 20, 10179 Berlin
See you there.
Sönke
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The next haskell meeting in Berlin will be this wednesday:
Date: Wednesday, November 24th
Time: from 20:00
Location: c-base, Rungestrasse 20, 10179 Berlin
Hope to see you there,
Sönke
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On Friday, October 29, 2010 02:07:55 am Daniel van den Eijkel wrote:
> Hi,
>
> thanks to all participants for the funny meeting! I had a lot of fun and
> I'm looking forward to see you again.
I had fun, too. There were twice as many people than I anticipated (4 instead
of 2) and we outnumbered t
> I have been thinking for a while that it might be worth defining a
> Prelude2, which corrects the known problems with the Prelude. Over time,
> people could migrate to using Prelude2. It would probably take years to be
> widely adopted, but at least there would be light at the end of the
> tunne
On Saturday, October 23, 2010 07:50:41 pm Johannes Waldmann wrote:
> > There will be an informal Haskell meeting [...]
> > The bi-monthly lisp meeting [...]
> > [1] http://www.c-base.org/calender/phpicalendar/month.php
>
> Pray tell - which of the three above-mentioned languages is from the dark
>
Hi all!
There will be an informal Haskell meeting in Berlin.
Date: Thursday, October 28th
Time: from 20:00
Location: c-base, Rungestrasse 20, 10179 Berlin
The bi-monthly lisp meeting takes place at the same time and place [1].
This is the first of hopefully more meetings to come, so we will pro
On Monday, June 28, 2010 10:38:33 am José Romildo Malaquias wrote:
> Is there in Haskell a non monadic function of type a -> a -> Bool which
> test for physical equality of two values? It would return True if only
> if both values are the same object in memory.
IIRC "observable sharing" does simil
On Monday 01 March 2010 03:16:25 pm Sönke Hahn wrote:
>
> Yes there are. I am working on a game with Haskell using OpenGL rendering.
> I've done some frame time measurements lately and encountered single frames
> needing more than 100ms to be rendered. I am currently
On Monday 01 March 2010 01:04:37 am Luke Palmer wrote:
> On Sun, Feb 28, 2010 at 2:06 AM, Pavel Perikov wrote:
> > Did you really seen 100ms pauses?! I never did extensive research on this
> > but my numbers are rather in microseconds range (below 1ms). What causes
> > such a long garbage collecti
On Sunday, Andrew Coppin asked:
> Is Thread Scope any use for profiling single-threaded programs?
I used threadscope to look at eventlogs from a program that uses OpenGL to
render multiple frames per second (compiled without "-threaded"). That means,
there is CPU activity regularly (multiple ti
On Wednesday 11 November 2009 08:23:53 am Tony Morris wrote:
> I have two projects that I intend to put on hackage soon. One depends
> on the other. I have "cabaled" both. I am wondering how others work
> with this kind of set up where changes are made to both libraries as
> they work.
>
What i d
On Monday 19 October 2009 10:30:55 am Dougal Stanton wrote:
> Has not been responding for at least the last 12 hours.
>
> Is there somewhere to look for status reports on sysadmin details like
> this, so we can tell if
>
> - it's a scheduled down time
> - it's a problem but the admins know about
On Wednesday 14 October 2009 04:50:56 pm Sönke Hahn wrote:
> On Friday 09 October 2009 07:19:30 pm Peter Verswyvelen wrote:
> > Mmm, that seems like a shortcoming.
> >
> > Well, you could just wrap the C functions yourself, like this (two
> > possibilities, no err
tion.
Again, many thanks,
Sönke
>
> On Fri, Oct 9, 2009 at 5:37 PM, Sönke Hahn wrote:
> > Hi!
> >
> > I need to set an environment variable from Haskell and i would like to do
>
> that
>
> > cross-platform. There is System.Posix.Env.setEnv, which does
On Friday 09 October 2009 07:07:21 pm Duncan Coutts wrote:
> On Fri, 2009-10-09 at 17:37 +0200, Sönke Hahn wrote:
> > Hi!
> >
> > I need to set an environment variable from Haskell and i would like to do
> > that cross-platform. There is System.Posix.Env.setEnv, which do
Hi!
I need to set an environment variable from Haskell and i would like to do that
cross-platform. There is System.Posix.Env.setEnv, which does exactly, what i
want on Linux. There is the module System.Environment, which seems to be
cross-platform, but it does not contain functions to manipulat
>
> On 5 Oct 2009, at 21:06, Lennart Augustsson wrote:
> > OK, "just pairs" have no arithmetic, but one way of defining
> > arithmetic is to treat the pairs as complex numbers. Or as mantissa
> > and exponent. Or as something else. So there's nothing wrong, IMO,
> > to make pairs an instance of
Hi!
I often stumble upon 2- (or 3-) dimensional numerical data types like
(Double, Double)
or similar self defined ones. I like the idea of creating instances for Num for
these types. The meaning of (+), (-) and negate is clear and very intuitive, i
think. I don't feel sure about (*), abs,
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