Re: [Haskell-cafe] ANN: E-book version of the Typeclassopedia
Thanks, I wanted this for a long time as well! A. On 5 October 2013 17:25, Flavio Villanustre fvillanus...@gmail.com wrote: Very useful, thanks! On Oct 4, 2013 9:13 AM, Erlend Hamberg ehamb...@gmail.com wrote: While re-reading Brent Yorgey's Excellent Typeclassopedia I converted it to Pandoc Markdown in order to be able to create an EPUB version. Having a “real” e-book meant that I could comfortably read it on my e-book reader and highlight text and take notes while reading. I also fixed some minor issues while reading it. (These fixes were of course backported to the official Typeclassopedia version on the Haskell Wiki.) The EPUB file can be downloaded from Github: https://github.com/ehamberg/typeclassopedia-md/releases The Markdown source is also available in that repo and you can of course use Pandoc to convert the Markdown file to all the other output formats Pandoc supports. By using a program like Calibre, the EPUB file can be converted to other e-book formats such as the Kindle format. I hope people find this useful. :-) -- Erlend Hamberg ehamb...@gmail.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANN: hspec-test-framework - Run test-framework tests with Hspec
Hi Simon, this is an exciting news! May I ask the question that maybe is lurking in the shadow? Due to the recent announcement of Roman's tasty library, are there plans to basically release something similar to hspec-test-framework and hspec-test-framework-th but targeting tasty instead? Bye :) A. On 18 August 2013 14:50, Simon Hengel s...@typeful.net wrote: Hi, I just released hspec-test-framework[1] and hspec-test-framework-th[2] to Hackage. They can be used to run test-framework tests with Hspec unmodified. This can also be used to work around test-framework's incompatibility with QuickCheck-2.6 and base-4.7.0 ;) Have a look at the README for usage instructions: https://github.com/sol/hspec-test-framework#readme Cheers, Simon [1] http://hackage.haskell.org/package/hspec-test-framework [2] http://hackage.haskell.org/package/hspec-test-framework-th ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Does exist something like data-files in Cabal, which works at compile time?
Hello guys, I'm pretty sure the answer is no, but I was hoping to get some extra insight / best practices. The problem can be summarised by this SO question (not the OP, but I have the same problem): http://stackoverflow.com/questions/15731170/cabal-how-to-add-text-file-as-a-build-dependency As someone states, data-files in for run-time, whereas I need to tell cabal please copy these files in place before trying to compile, so at compile-time. Does something similar exist? I think the best solution, unless someone prove me wrong, is to create a small startup script which copies the files for me (I *think* yesod is using something similar, namely a script called EmbeddedFiles.hs) and then triggers cabal install the usual way. Can you come up with a better way? Thanks in advance! Alfredo ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Does exist something like data-files in Cabal, which works at compile time?
Hi Daniel, It's the path I've eventually took as well. Many thanks, Sent from my iPad On 16/ago/2013, at 11:13, Daniel Díaz Casanueva dhelta.d...@gmail.com wrote: What I have always done to solve this is to create a custom Setup.hs. Something like: Setup.hs - import Distribution.Simple main :: IO () main = doThisBeforeInstall defaultMain - Then you specify in your .cabal file that the Build-Type is Custom. Best regards, Daniel Díaz. On Fri, Aug 16, 2013 at 11:58 AM, Alfredo Di Napoli alfredo.dinap...@gmail.com wrote: Hello guys, I'm pretty sure the answer is no, but I was hoping to get some extra insight / best practices. The problem can be summarised by this SO question (not the OP, but I have the same problem): http://stackoverflow.com/questions/15731170/cabal-how-to-add-text-file-as-a-build-dependency As someone states, data-files in for run-time, whereas I need to tell cabal please copy these files in place before trying to compile, so at compile-time. Does something similar exist? I think the best solution, unless someone prove me wrong, is to create a small startup script which copies the files for me (I *think* yesod is using something similar, namely a script called EmbeddedFiles.hs) and then triggers cabal install the usual way. Can you come up with a better way? Thanks in advance! Alfredo ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Does exist something like data-files in Cabal, which works at compile time?
Thanks Dag, I'll give it a spin. Btw, I've successfully solved my problem
with the following Setup.hs, I'm posting it here in case someone will find
this useful in the future:
#!/usr/bin/env runhaskell
import Distribution.Simple
import Distribution.PackageDescription
import Distribution.Package
import Distribution.Simple
import Distribution.Simple.LocalBuildInfo
import Distribution.Simple.Setup
import Distribution.Verbosity
import Distribution.Simple.Utils
import Paths_myproject
main :: IO ()
main = defaultMainWithHooks myHooks
where myHooks = simpleUserHooks { preBuild = copyResources }
copyResources :: Args
- BuildFlags
- IO HookedBuildInfo
copyResources args flags = do
installDir - getDataDir
installDirectoryContents verbose resources (installDir ++ /resources)
return emptyHookedBuildInfo
where myproject should be the name of your project, as in myproject.cabal.
On 16 August 2013 13:11, Dag Odenhall dag.odenh...@gmail.com wrote:
You want extra-source-files. They'll be included in the tarball, and
cabal always builds from the root of the package, so you can safely use
relative paths.
On Fri, Aug 16, 2013 at 11:58 AM, Alfredo Di Napoli
alfredo.dinap...@gmail.com wrote:
Hello guys,
I'm pretty sure the answer is no, but I was hoping to get some extra
insight / best practices. The problem can be summarised by this SO question
(not the OP, but I have the same problem):
http://stackoverflow.com/questions/15731170/cabal-how-to-add-text-file-as-a-build-dependency
As someone states, data-files in for run-time, whereas I need to tell
cabal please copy these files in place before trying to compile, so at
compile-time.
Does something similar exist?
I think the best solution, unless someone prove me wrong, is to create a
small startup script which copies the files for me (I *think* yesod is
using something similar, namely a script called EmbeddedFiles.hs) and then
triggers cabal install the usual way. Can you come up with a better way?
Thanks in advance!
Alfredo
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Re: [Haskell-cafe] Promoting Haskell via Youtube movies
Thanks guys, lots of interesting material I wasn't aware of! A. On 22 June 2013 14:42, Mihai Maruseac mihai.marus...@gmail.com wrote: On Wed, Jun 19, 2013 at 3:03 AM, Carlo Hamalainen ca...@carlo-hamalainen.net wrote: On 18/06/13 04:23, Mihai Maruseac wrote: I was wondering if we have similar movies for Haskell as https://www.youtube.com/watch?v=kLO1djacsfg and https://www.youtube.com/watch?v=E3418SeWZfQ exist for Java. I indend to give them to some people to make them intrigued by the language and start learning it / looking for it. Cool, many thanks to all who answered here, they have proven useful -- MM All we have to decide is what we do with the time that is given to us ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Array, Vector, Bytestring
To make the transition easier I have an experimental library which defines a ByteString as a type synonym of a Storable.Vector of Word8 and provides the same interface as the bytestring package: https://github.com/basvandijk/vector-bytestring That's interesting Bas. What bothers me about ByteStrings is that they need to be pinned inside the heap, preventing the GC from collecting them. This is more than an issue, I think, if a program uses them massively and they needs to be allocated persistently (example: a long-life constant). I know is still a marginal case, but knowing that a part of my heap is pinned makes my sleep quality degrade :( I assume that working with vector remove the problem, correct? A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Array, Vector, Bytestring
Hello Bas, sorry for being unclear. What you say is correct, I was referring (and I realised this after posting :D ) that the real annoying thing is fragmentation in memory. Due to the fact the GC can't move those objects, if we have long running processes our memory will become more and more fragmented, correct? :( A. On 10 July 2013 08:25, Bas van Dijk v.dijk@gmail.com wrote: On 10 July 2013 08:57, Alfredo Di Napoli alfredo.dinap...@gmail.com wrote: To make the transition easier I have an experimental library which defines a ByteString as a type synonym of a Storable.Vector of Word8 and provides the same interface as the bytestring package: https://github.com/basvandijk/vector-bytestring That's interesting Bas. What bothers me about ByteStrings is that they need to be pinned inside the heap, preventing the GC from collecting them. Being pinned doesn't prevent an object from being garbage collected. It just means that the GC won't move the object around so that foreign code can reliably reference the object while the GC is running: http://ghc.haskell.org/trac/ghc/wiki/Commentary/Rts/Storage/GC/Pinned I assume that working with vector remove the problem, correct? There wasn't a problem in the first but note that a Storable Vector is implemented in the same way as a ByteString: a ForeignPtr and a length* I hope I have now improved your sleep quality ;-) Cheers, Bas * A ByteString also contains an offset but vector modifies the pointer in the ForeignPtr instead so we safe an Int there. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Hackage Update Brigade
Can I join too? Always happy to spend my free time merging and reviewing some Haskell code :) A. On 29 May 2013 04:56, Lyndon Maydwell maydw...@gmail.com wrote: Done :) On Wed, May 29, 2013 at 12:22 PM, Conrad Parker con...@metadecks.orgwrote: On 29 May 2013 08:54, Lyndon Maydwell maydw...@gmail.com wrote: How can I join the group? by asking any of the current members :) I've added you. P.S. I've attached a simple image for the Gravatar if it looks okay. great, can you add it? Conrad. On Tue, May 28, 2013 at 12:40 PM, Conrad Parker con...@metadecks.org wrote: On 28 May 2013 05:29, Alexander Solla alex.so...@gmail.com wrote: As per recent discussions, I'm making a list of volunteers who are willing to pick up some slack in Hackage package maintenance, so that we can submit an amendment to the Haskell Prime Committee's ticket 113 (http://hackage.haskell.org/trac/haskell-prime/ticket/113) I think that showing that people are willing to pick up missing package maintainer's slack will alleviate the concern of breaking lots of code by refactoring the monad/applicative/functor hierarchy. Code will be broken, but publicly available packages can be fixed by the community during a staging period. To that end, I have made a Google Form to collect some volunteer information. If you are interested in helping, please visit: https://docs.google.com/forms/d/1o4B8CEE_42u9f-sgmu2t5iSEvm0cq6-um6g_fHJt6GE/viewform For that proposal, there is also an informal github group for updating unmaintained packages, which anyone willing is welcome to join: https://github.com/haskell-pkg-janitors cheers, Conrad. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Release Candidates for Haskell Platform 2013.2
That's awesome :) I'm just curious to dig deeper inside the updates to OpenGL and GLUT, any link or change notes I can read? Thanks, A. On 13 May 2013 15:39, Mark Lentczner mark.lentcz...@gmail.com wrote: *Some of the release candidates for Haskell Platform 2013.2 are up.* *These are what I expect to simply re-brand as the release, unless anyone uncovers some issues.* *If you decide to test these out, please let me know how it goes.* * * The Mac OS X RC2 installers: *32bit: *Haskell Platform 2013.2.0.0 32bit rc2.signed.pkghttp://www.ozonehouse.com/mark/platform/Haskell%20Platform%202013.2.0.0%2032bit%20rc2.signed.pkg *64bit: *Haskell Platform 2013.2.0.0 64bit rc2.signed.pkghttp://www.ozonehouse.com/mark/platform/Haskell%20Platform%202013.2.0.0%2064bit%20rc2.signed.pkg The source tarball (RC1): haskell-platform-2013.2.0.0-rc1.tar.gzhttp://www.ozonehouse.com/mark/platform/haskell-platform-2013.2.0.0-rc1.tar.gz *Notable new things in Haskell Platform 2013.2:* - GHC 7.6.3 - Major update to *OpenGL* *GLUT* - New packages: - *attoparsec* - *case-insensitive* - *hashable* - *unordered-containers* — Mark mad releaser Lentczner ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] a library for abstract algebra?
Wow, there is an Edward Kmett package for everything, isn't it? :D On 18 April 2013 13:12, Gábor Lehel illiss...@gmail.com wrote: http://hackage.haskell.org/package/algebra -- Your ship was destroyed in a monadic eruption. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] yi-editor for emacer
thanks a great news, thanks, even though I'm a Vim user :) I continue to think that Yi is a promising editor, it's a shame we don't have a serious community effort to make it better :) A. On 15 April 2013 06:02, Junior White efi...@gmail.com wrote: Hi Cafe, I'm glad to announce my fork of yi-editor. As a emacer, I made yi-editor more emacs like, including the following change: 1. ido-mode like file find and buffer find 2. support more color in vty 3. automatic search tags file in parents's directory 4. change some keymap The following step to have a try: 1. clone : git clone https://github.com/onlyu/yi.git 2. build : ./yi/yi.sh --rebuild 3. run: ./yi/yi.sh Thanks for have a test, and thanks yi-editor, now I combine my favourite editor (emacs) and language (haskell) together. Apologize for my noisy! ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Threadscope 0.2.2 goes in segmentation fault on Mac Os X 10.8.3
Hi Edsko, thanks for the reply. The only things that might affect the outcome are: a) Ghc version: I'm running ghc 7.6.2 instead of 7.6.1 b) Don't know if you are using cabal-dev as sandboxing (like any good Haskell programmer I'm too lazy to open your blog post :D ), whilst I'm using hsenv c) I've brewed GTK instead of manually installing it, but gtk-demo runs just fine d) Are you using XQuartz? If yes, which version? Thanks again! A. On 4 April 2013 08:52, Edsko de Vries edskodevr...@gmail.com wrote: Hi Alfredo, No dark magic as far as I recall (except in the actual bundling as a Mac app, unfortunately that required some magic, the GTK libraries don't relocate so easily :-( ). I didn't have any problems building. I compiled it with ghc 7.6.1, with the GTK libraries installed manually (there are some suggestions on how to do that at the very end of my Comprehensive Haskell Sandboxes post, http://www.edsko.net/2013/02/10/comprehensive-haskell-sandboxes/). It used to be a lot more painful (requiring the latest versions of Haskell libraries, with patches etc.) but these days the situation is a lot better. (That's not so say that problems like the one you reported don't still crop up from time to time, and can cause many a sleepless night..). Edsko On Wed, Apr 3, 2013 at 9:33 PM, Alfredo Di Napoli alfredo.dinap...@gmail.com wrote: Thanks Edsko, the app is awesome and it's starting just fine. Even though this fixes my problem, it doesn't solve the root, namely why it was failing. Can you tell me a bit more about the dark magic you used to make it work? Which GHC version did you use? Thanks a lot, A. On 3 April 2013 12:40, Edsko de Vries edskodevr...@gmail.com wrote: I provide a ThreadScope binary on my site ( http://www.edsko.net/2013/01/24/threadscope-0-2-2/) which runs fine for me on 10.8.3. -E On Mon, Apr 1, 2013 at 8:01 AM, Dominic Steinitz domi...@steinitz.orgwrote: Alfredo Di Napoli alfredo.dinapoli at gmail.com writes: Said that,has someone had any luck in running Threadscope on Mac OS X 10.8 at all? Thanks, A. I think I have encountered the same problem: https://groups.google.com/d/msg/parallel-haskell/-lhrgNN8elw/KzqLM9BzoJwJ In my experience, anything that uses gtk is a problem on a MAC. I still intend to do some analysis *not* using threadscope but using event-logs directly but that is at least a few weeks away. Dominic. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Threadscope 0.2.2 goes in segmentation fault on Mac Os X 10.8.3
Perfect, I will try to probe the ground for points c) and d), and I will get back to all of you if I manage to shed some light to this mystery :D A. On 4 April 2013 09:12, Edsko de Vries edskodevr...@gmail.com wrote: a) 7.6.2 vs 7.6.1 seems unlike to be the issue, although theoretically possible I guess. b) Actually, the blog post is how to set things up by hand for better control than either of those tools give you; but again, I don't think it's relevant. c) This might be a bigger difference. I don't know what version brew installs, where it installs it, etc. etc. d) And this might be related too; yes, I'm using XQuartz and have the GTK compiled for it; currently using 2.7.4 but I don't know if I upgraded since building. -E On Thu, Apr 4, 2013 at 9:07 AM, Alfredo Di Napoli alfredo.dinap...@gmail.com wrote: Hi Edsko, thanks for the reply. The only things that might affect the outcome are: a) Ghc version: I'm running ghc 7.6.2 instead of 7.6.1 b) Don't know if you are using cabal-dev as sandboxing (like any good Haskell programmer I'm too lazy to open your blog post :D ), whilst I'm using hsenv c) I've brewed GTK instead of manually installing it, but gtk-demo runs just fine d) Are you using XQuartz? If yes, which version? Thanks again! A. On 4 April 2013 08:52, Edsko de Vries edskodevr...@gmail.com wrote: Hi Alfredo, No dark magic as far as I recall (except in the actual bundling as a Mac app, unfortunately that required some magic, the GTK libraries don't relocate so easily :-( ). I didn't have any problems building. I compiled it with ghc 7.6.1, with the GTK libraries installed manually (there are some suggestions on how to do that at the very end of my Comprehensive Haskell Sandboxes post, http://www.edsko.net/2013/02/10/comprehensive-haskell-sandboxes/). It used to be a lot more painful (requiring the latest versions of Haskell libraries, with patches etc.) but these days the situation is a lot better. (That's not so say that problems like the one you reported don't still crop up from time to time, and can cause many a sleepless night..). Edsko On Wed, Apr 3, 2013 at 9:33 PM, Alfredo Di Napoli alfredo.dinap...@gmail.com wrote: Thanks Edsko, the app is awesome and it's starting just fine. Even though this fixes my problem, it doesn't solve the root, namely why it was failing. Can you tell me a bit more about the dark magic you used to make it work? Which GHC version did you use? Thanks a lot, A. On 3 April 2013 12:40, Edsko de Vries edskodevr...@gmail.com wrote: I provide a ThreadScope binary on my site ( http://www.edsko.net/2013/01/24/threadscope-0-2-2/) which runs fine for me on 10.8.3. -E On Mon, Apr 1, 2013 at 8:01 AM, Dominic Steinitz domi...@steinitz.org wrote: Alfredo Di Napoli alfredo.dinapoli at gmail.com writes: Said that,has someone had any luck in running Threadscope on Mac OS X 10.8 at all? Thanks, A. I think I have encountered the same problem: https://groups.google.com/d/msg/parallel-haskell/-lhrgNN8elw/KzqLM9BzoJwJ In my experience, anything that uses gtk is a problem on a MAC. I still intend to do some analysis *not* using threadscope but using event-logs directly but that is at least a few weeks away. Dominic. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Threadscope 0.2.2 goes in segmentation fault on Mac Os X 10.8.3
Thanks Edsko, the app is awesome and it's starting just fine. Even though this fixes my problem, it doesn't solve the root, namely why it was failing. Can you tell me a bit more about the dark magic you used to make it work? Which GHC version did you use? Thanks a lot, A. On 3 April 2013 12:40, Edsko de Vries edskodevr...@gmail.com wrote: I provide a ThreadScope binary on my site ( http://www.edsko.net/2013/01/24/threadscope-0-2-2/) which runs fine for me on 10.8.3. -E On Mon, Apr 1, 2013 at 8:01 AM, Dominic Steinitz domi...@steinitz.orgwrote: Alfredo Di Napoli alfredo.dinapoli at gmail.com writes: Said that,has someone had any luck in running Threadscope on Mac OS X 10.8 at all? Thanks, A. I think I have encountered the same problem: https://groups.google.com/d/msg/parallel-haskell/-lhrgNN8elw/KzqLM9BzoJwJ In my experience, anything that uses gtk is a problem on a MAC. I still intend to do some analysis *not* using threadscope but using event-logs directly but that is at least a few weeks away. Dominic. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Threadscope 0.2.2 goes in segmentation fault on Mac Os X 10.8.3
Fair enough :) Here is the gdb output: (gdb) run Starting program: /Users/adinapoli/Library/Haskell/ghc-7.6.2/bin/threadscope Reading symbols for shared libraries ++... done Reading symbols for shared libraries . done Reading symbols for shared libraries . done Reading symbols for shared libraries . done Reading symbols for shared libraries . done Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x 0x in ?? () I have two hypothesis: a) could be the RAM (tips about some RAM testing tool?) b) could be some programs which is writing in that portion of memory, see: https://discussions.apple.com/thread/3734077?start=0tstart=0 On 30 March 2013 15:19, John Wiegley jo...@fpcomplete.com wrote: Alfredo Di Napoli alfredo.dinap...@gmail.com writes: I know it's a bit difficult to debug this way, I can try debugging with gdb if it can help. Yes, can you show us a backtrace from gdb, and also look in your CrashReports log folder to see if it gives a bit more information on the state of the process at the time it died? Thanks, -- John Wiegley FP Complete Haskell tools, training and consulting http://fpcomplete.com johnw on #haskell/irc.freenode.net ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Threadscope 0.2.2 goes in segmentation fault on Mac Os X 10.8.3
Hi Tobias, What do you mean by _some_ program? It's the program that you started (threadscope). In a forum I've read that this error could be some third party app (for example one started at login or running as a daemon) which is conflicting and causing the error. Unlikely, but i've reported the possibility for completeness. Said that,has someone had any luck in running Threadscope on Mac OS X 10.8 at all? Thanks, A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Threadscope 0.2.2 goes in segmentation fault on Mac Os X 10.8.3
Hi Cafè, I've tried installing threadscope, but when I run it from console with threadscope I get a laconic segmentation fault. Some info to help the debugging: * Installed gtk via brew * gtk-demo runs correctly * I'm using Mac Os X 10.8.3 * Running gtk and threadscope through a virtual environment (provided by hsenv) * Using XQuartz 2.7.4 I know it's a bit difficult to debug this way, I can try debugging with gdb if it can help. Cheers, A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] How to use the nice test output spit out by test-framework with cabal test?
Hi guys, I've been wondering for a long time about how to use the nice terminal-base report spit out from test-framework when I type cabal test. Atm this is my run-of-the-mill cabal setting: test-suite test-all type: exitcode-stdio-1.0 main-is: Main.hs ghc-options: -w -threaded -rtsopts -with-rtsopts=-N hs-source-dirs: tests [...] but this runs tests using the default cabal interface: Linking dist/build/test-all/test-all ... Running 1 test suites... Test suite test-all: RUNNING... Test suite test-all: PASS Test suite logged to: dist/test/opencv-simple-0.1.0.0-test-all.log 1 of 1 test suites (1 of 1 test cases) passed. This is, instead, what I wanted when I type cabal test and cabal install --enable-tests: http://batterseapower.github.com/test-framework/images/example.png is it possible? Thanks in advance, A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Question about updating GHC on MacOS
From my $0.2 experience, if you are planning of having multiple GHC installation, it would be better to do a fresh install using the bootstrapped GHC you can find on the website. Roughly I have done this way (on my Mac and on My EC2 instance): (inside a ghc bootstrapped folder) ./configure --prefix=~/Library/Haskell/ghc-xxx (where xxx is the version) make install (then inside ~/Library/Haskell) ln -s ghc-xxx current ln -s current/bin bin This way my current GHC is pointing to current inside ~/Library/Haskell/current and my bin are updated accordingly (make sure to add /bin to your $PATH!). Then you install cabal-install and you are pretty much sorted. The advantage of this approach is that you have the control over the installation process, but other suggestion (like Alp's one) are pretty good too. Mostly depends on what you think will work best for you :) A. On 11 March 2013 11:33, Alp Mestanogullari alpmes...@gmail.com wrote: I don't think so. However, you can install the OS X binaries for ghc 7.6.2 and make that sit just next to your Haskell Platform install. You can even use your existing cabal-install to install packages for the freshly installed ghc by doing 'cabal install foo --with-ghc=/path/to/ghc'. Just watch which ghc does become the default (it's a matter of replacing a symlink) and that it satisfies you. On Thu, Mar 7, 2013 at 10:50 PM, Graham Klyne g...@ninebynine.org wrote: Hi, I have Haskell Platform with GHC[i] 7.4.2 installed on a MacOS system. There's a problem with the handling of certain Markdown constructs in literate Haskell (lines starting with '#') that I understand is fixed in 7.6.2. Therefore, I'd like to be able to update my GHC installation to 7.6.2. But I haven't yet been able to find any instructions about how to upgrade an existing GHC installation. Am I missing something? #g -- __**_ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/**mailman/listinfo/haskell-cafehttp://www.haskell.org/mailman/listinfo/haskell-cafe -- Alp Mestanogullari ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANNOUNCE: io-streams 1.0.0.0
As I've already said on Reddit, awesome job guys. From the little I've seen the API is very lean and easy, so I'm really looking forward to playing with it and helping you with it as well :) Bye, Alfredo ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Haskell syntax/indentation for vim
Here is the crazy idea; instead of having a vim plugin to rule-them-all, why you don't join your efforts and create a plugin which does only indentation for Haskell code? This way, we could have a modular stack and be free to use whatever plugins work for syntax highlighting / unicode syntactic sugar / whatever, but still have a de facto plugin for indenting haskell code in Vim in a smart way :) A.- ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Aeson + MongoDB, how to effortlessly store and retrieve json?
Good evening guys, suppose I write a very simple parser using Aeson with these types and ToJSON / FromJSON instances: https://github.com/cakesolutions/the-pragmatic-haskeller/blob/master/01-json/Pragmatic/Types.hs https://github.com/cakesolutions/the-pragmatic-haskeller/blob/master/01-json/Pragmatic/JSON/Parser.hs My question is simple: is it possible to automagically store the haskell data structure produced from the aeson encoding using http://hackage.haskell.org/packages/archive/mongoDB/1.3.2/doc/html/Database-MongoDB-Query.html#g:7 Any tip/suggestion is welcome, Thanks, Alfredo ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Aeson + MongoDB, how to effortlessly store and retrieve json?
Hi Niklas, From a quick look it seems to be suitable for my task. I'll have a look ASAP and I'll keep you posted. Many thanks! Alfredo Di Napoli On 19/feb/2013, at 00:32, Niklas Hambüchen m...@nh2.me wrote: Not sure if this is helpful, but have a look at aesonbson: https://github.com/nh2/aesonbson/blob/master/Data/AesonBson.hs It can convert aeson to bson and the other way around, so you can easily convert 'Object's to 'Document's. Is that what you are looking for? On 18/02/13 21:37, Alfredo Di Napoli wrote: My question is simple: is it possible to automagically store the haskell data structure produced from the aeson encoding using http://hackage.haskell.org/packages/archive/mongoDB/1.3.2/doc/html/Database-MongoDB-Query.html#g:7 ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Ticking time bomb
+1 for keeping this alive. Apart from the initial hype, now this issue is slowly losing attention but I think we should always keep the risk we are exposed to. Being I will sound pessimistic, but we should learn from the competitors mistakes :) Cheers, A. On 12 February 2013 08:49, Bob Ippolito b...@redivi.com wrote: The Python and Ruby communities are actively working on improving the security of their packaging infrastructure. I haven't paid close attention to any of the efforts so far, but anyone working on cabal/hackage security should probably take a peek. I lurk on Python's catalog-sig list and here's the interesting bits I've noticed from the past few weeks: [Catalog-sig] [Draft] Package signing and verification process http://mail.python.org/pipermail/catalog-sig/2013-February/004832.html [Catalog-sig] [DRAFT] Proposal for fixing PyPI/pip security http://mail.python.org/pipermail/catalog-sig/2013-February/004994.html Python PyPi Security Working Document: https://docs.google.com/document/d/1e3g1v8INHjHsUJ-Q0odQOO8s91KMAbqLQyqj20CSZYA/edit Rubygems Threat Model: http://mail.python.org/pipermail/catalog-sig/2013-February/005099.html https://docs.google.com/document/d/1fobWhPRqB4_JftFWh6iTWClUo_SPBnxqbBTdAvbb_SA/edit TUF: The Update Framework https://www.updateframework.com/ On Fri, Feb 1, 2013 at 4:07 AM, Christopher Done chrisd...@gmail.comwrote: Hey dude, it looks like we made the same project yesterday: http://www.reddit.com/r/haskell/comments/17njda/proposal_a_trivial_cabal_package_signing_utility/ Yours is nice as it doesn't depend on GPG. Although that could be a nice thing because GPG manages keys. Dunno. Another diff is that mine puts the .sig inside the .tar.gz, yours puts it separate. =) On 31 January 2013 09:11, Vincent Hanquez t...@snarc.org wrote: On 01/30/2013 07:27 PM, Edward Z. Yang wrote: https://status.heroku.com/incidents/489 Unsigned Hackage packages are a ticking time bomb. I agree this is terrible, I've started working on this, but this is quite a bit of work and other priorities always pop up. https://github.com/vincenthz/cabal https://github.com/vincenthz/cabal-signature My current implementation generate a manifest during sdist'ing in cabal, and have cabal-signature called by cabal on the manifest to create a manifest.sign. The main issue i'm facing is how to create a Web of Trust for doing all the public verification bits. -- Vincent ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Control.Monad provisional?
I might be wrong, but the impression I always had is that that field is something that most developer struggle to keep in sync. Maybe it was provisional ages ago, but they simply forgot to upgrade to stable or they are simply too humble and think How am I to judge if a package is stable or not? :) My 2 cents :P A. On 10 February 2013 20:38, Petr Pudlák petr@gmail.com wrote: Dear Haskellers, Looking at Control.Monad: http://hackage.haskell.org/packages/archive/base/4.6.0.0/doc/html/Control-Monad.html I see: Stability provisional. I checked some older versions and it's the same. This feel somewhat unsettling - if Control.Monad is provisional, do we have any stable packages at all? Best regards, Petr Pudlak ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] [Announcement] hArduino: Control your Arduino board from Haskell
Sounds cool! Thanks for your effort! :) A. On 10 February 2013 22:54, Levent Erkok erk...@gmail.com wrote: I'm happy to announce hArduino: a library that allows Arduino boards to be controlled directly from Haskell. hArduino uses the Firmata protocol ( http://firmata.org), to communicate with and control Arduino boards, making it possible to implement many controller projects directly in Haskell. Home page: http://leventerkok.github.com/hArduino/ Hackage: http://hackage.haskell.org/package/hArduino Some example programs: Blink the led: http://hackage.haskell.org/packages/archive/hArduino/latest/doc/html/System-Hardware-Arduino-SamplePrograms-Blink.html Digital counter: http://hackage.haskell.org/packages/archive/hArduino/latest/doc/html/System-Hardware-Arduino-SamplePrograms-Counter.html Control an LCD: http://hackage.haskell.org/packages/archive/hArduino/latest/doc/html/System-Hardware-Arduino-SamplePrograms-LCD.html Short (4.5 mins) youtube video of the blink example: http://www.youtube.com/watch?v=PPa3im44t2g hArduino is work-in-progress: Patches, bug-reports, and feedback is most welcome. -Levent. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Next Meetup
Ok, so not exactly around the corner for me, but thanks for clarifying :D Alfredo On 4 February 2013 20:53, Albert Y. C. Lai tre...@vex.net wrote: On 13-02-04 02:56 AM, Alfredo Di Napoli wrote: Reverse engineering (aka Google searching) for Hacklab seems to reveal that the location is Edimburgh: Correct? :D There are many Hacklabs worldwide. But this one is Toronto, Canada. I know because Christopher runs the Toronto Haskell Meetup and I go. And I will be talking about Arrow in the February meeting. And last month I talked about Parsec, and I documented it at http://www.vex.net/~trebla/**haskell/parsec-generally.xhtmlhttp://www.vex.net/~trebla/haskell/parsec-generally.xhtml Toronto is an international metropolis with three globally renowned universities, multiple major-player high-tech labs, a world-class orchestra and several world-class choirs, and fine cuisines from almost all cultures. Toronto is home of the Toronto Haskell Meetup. The Toronto Haskell Meetup welcomes attendees from all over the world. __**_ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/**mailman/listinfo/haskell-cafehttp://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Next Meetup
Reverse engineering (aka Google searching) for Hacklab seems to reveal that the location is Edimburgh: Correct? :D On 4 February 2013 05:39, Ivan Lazar Miljenovic ivan.miljeno...@gmail.comwrote: On 4 February 2013 16:27, Christopher Olah christopherolah...@gmail.com wrote: Hey All, I think we were planning on meeting on the second Wednesday of this month (Feb 13) but Hacklab has a members meeting that day. How do people feel about the 14th or 15th? Might help if you specify which location this meetup is intended for; haskell-cafe has a global membership ;-) Chris ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- Ivan Lazar Miljenovic ivan.miljeno...@gmail.com http://IvanMiljenovic.wordpress.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Heads up: planned removal of String instances from HTTP package
Maybe (just my 2 cents!) since you are going to broke the API anyway, go for it and seize the occasion to really clean up :) Obviously I'm saying this from a non-http-user point of view, maybe if I had some code in production affected by this, my suggestion would have been different :P Regards, A. On 30 January 2013 07:00, Ganesh Sittampalam gan...@earth.li wrote: On 29/01/2013 22:46, Johan Tibell wrote: On Tue, Jan 29, 2013 at 2:15 PM, Ganesh Sittampalam gan...@earth.li wrote: tl;dr: I'm planning on removing the String instances from the HTTP package. This is likely to break code. Obviously it will involve a major version bump. I think it's the right thing to do. Providing a little upgrade guide should help things to go smoother. One obvious cheap-and-dirty migration is via a newtype wrapper for String that embeds the old broken behaviour (char8 encoding). Perhaps the package should provide that? (with appropriate warnings etc) Ganesh ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Chordify, a new web startup using Haskell
Congratulations! Keep up the good work, especially in using Haskell at a commercial level :) Bye! Alfredo On 18 January 2013 07:34, Alp Mestanogullari alpmes...@gmail.com wrote: That's awesome, works like a charm on the samples I've tried it on! Cheers to the Chordify team, I will use it and give any useful feedback if I have any. On Fri, Jan 18, 2013 at 12:07 AM, José Pedro Magalhães j...@cs.uu.nlwrote: Hi all, I'd like to introduce Chordify http://chordify.net/ [1], an online music player that extracts chords from musical sources like Soundcloud, Youtube or your own files, and shows you which chord to play when. Here's an example song: http://chordify.net/chords/passenger-let-her-go-official-video-passengermusic The aim of Chordify is to make state-of-the-art music technology accessible to a broader audience. Behind the scenes, Chordify uses the HarmTrace Haskell package to compute chords from audio. I've been working on this project with a couple of colleagues for a while now, and recently we have made the website public, free to use for everyone. We do not use Haskell for any of the frontend/user interface, but the backend is entirely written in Haskell (and it uses pretty advanced features, such as GADTs and type families [3]). We're particularly interested in user feedback at this stage, so if you're interested in music and could use an automatic chord transcription service, please try Chordify! Cheers, Pedro [1] http://chordify.net/ [2] http://hackage.haskell.org/package/HarmTrace [3] José Pedro Magalhães and W. Bas de Haas. Functional Modelling of Musical Harmony: an Experience Report. In Proceedings of the 16th ACM SIGPLAN International Conference on Functional Programming (ICFP'11), pp. 156–162, ACM, 2011. http://dreixel.net/research/pdf/fmmh.pdf ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- Alp Mestanogullari ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Where is the convergence point between Category Theory and Haskell?
Thanks everyone for the answers. Mine is just an experiment, but if I succeed in keeping it up and to come with something useful, I won't hesitate to poke you :) Btw, in case I succeed, posts will appear here: http://www.alfredodinapoli.com/posts.html and here: http://www.cakesolutions.net/teamblogs/ Bye, Alfredo On 13 January 2013 23:43, Christopher Howard christopher.how...@frigidcode.com wrote: On 01/13/2013 03:15 AM, Alfredo Di Napoli wrote: Morning Cafe, I'm planning to do a series of write-ups about Category Theory, to publish them on the company's blog I'm currently employed. I'm not a CT expert, but since the best way to learn something is to explain it to others, I want to take a shot :) In my mind I will structure the posts following Awodey's book, but I'm wondering how can I make my posts a little more real world. I always read about the Hask category, which seems to be the bootstrap of the whole logic behind Haskell. Can you please give my materials/papers/links/blogs to the Hask category and briefly explain me how it relates to Category Theory and Haskell itself? I hope my question is clear enough, in case is not, I'll restate :P Cheers, A. You want to give us the link to that blog? If you can keep your explanations reasonably illustrative and easy to understand, you'll get a regular reader out of me. -- frigidcode.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Where is the convergence point between Category Theory and Haskell?
Morning Cafe, I'm planning to do a series of write-ups about Category Theory, to publish them on the company's blog I'm currently employed. I'm not a CT expert, but since the best way to learn something is to explain it to others, I want to take a shot :) In my mind I will structure the posts following Awodey's book, but I'm wondering how can I make my posts a little more real world. I always read about the Hask category, which seems to be the bootstrap of the whole logic behind Haskell. Can you please give my materials/papers/links/blogs to the Hask category and briefly explain me how it relates to Category Theory and Haskell itself? I hope my question is clear enough, in case is not, I'll restate :P Cheers, A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Where is the convergence point between Category Theory and Haskell?
Thank you Alexander for the reply. My wondering is: is Hask a category created by Haskell researchers or was something already present in literature? Cheers, A. On 13 January 2013 17:44, Alexander Solla alex.so...@gmail.com wrote: There was a conversation on the cafe about this last month. Check out: https://groups.google.com/forum/#!topic/haskell-cafe/tBO2AowUvMY Category theory is a language of composition. In logical terms, different categories are models of different axioms. That said, a rich enough category is suitable for encoding the whole of category theory (as a language -- not necessarily as a model containing sub-models. Typing introduces some complications, since types meant to help us escape logical paradoxes like Russell's by introducing a notion of foundedness) Hask is the category whose objects are types and whose morphisms are Haskell functions. Hask is a very rich category, and is suitable for encoding a lot (but not all) of category theory. As far as I know, the actual boundary is as yet unknown. On Sun, Jan 13, 2013 at 4:15 AM, Alfredo Di Napoli alfredo.dinap...@gmail.com wrote: Morning Cafe, I'm planning to do a series of write-ups about Category Theory, to publish them on the company's blog I'm currently employed. I'm not a CT expert, but since the best way to learn something is to explain it to others, I want to take a shot :) In my mind I will structure the posts following Awodey's book, but I'm wondering how can I make my posts a little more real world. I always read about the Hask category, which seems to be the bootstrap of the whole logic behind Haskell. Can you please give my materials/papers/links/blogs to the Hask category and briefly explain me how it relates to Category Theory and Haskell itself? I hope my question is clear enough, in case is not, I'll restate :P Cheers, A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] A Meetup Group for MN Haskellers
You made me upset, I thought you created a Meetup for our mancunian :( sob :( Alfredo ps. Good luck for your meetup, though :) On 12 January 2013 16:40, Kim-Ee Yeoh k...@atamo.com wrote: Hey Danny, Good job taking the lead! Wish you all success because I think meetups have so many underrated benefits. (Where I am in a city 10 million, i.e. Jakarta, Indonesia, you'd think it would be a piece of cake, but so far no dice. Me and another guy are working on this ) Have you considered corralling a bunch of other FPers together, like the Bay Area FP group? Results from a search for Scala / Clojure Minneapolis look promising. -- Kim-Ee On Sat, Jan 12, 2013 at 10:32 PM, Danny Gratzer danny.grat...@gmail.comwrote: Hello, After seeing the post about Manchurian Haskellers I decided to start one for people in and around the Twin Cities. Here's the meetup page: http://www.meetup.com/HaskellMN/ If any Haskell guru's are lurking around here we'd love to have you give a talk! -- Danny Gratzer ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Mancunian Haskellers out there?
Great news James, thanks! I've checked on the map and is near Piccadilly Gardens, in the heart of Manchester! I'll join the google group and attend the next meeting for sure :) Cheers, A. On 3 January 2013 12:59, James Jeffries jamesjeffri...@gmail.com wrote: Hi there There isn't currently a haskell user groupu in Manchester, however there is a functional programming group where a lot of the member s are haskellers. http://www.lambdalounge.org.uk/ https://groups.google.com/forum/?fromgroups#!forum/lambda-lounge-manchester It is at Madlab in the Northern Quarter and there is usually a trip to the pub afterwards. Thanks James On 30/12/12 14:38, Alfredo Di Napoli wrote: Morning Cafe, I've been living in Manchester for 1 month now and I'm wondering if some on you are from the Greater Manchester area, so that we could chat about out beloved language in front of a glass of ale / tea :P Happy new year to everyone! A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org mailto:Haskell-Cafe@haskell.org Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Mancunian Haskellers out there?
Wow guys, that's a great news! I have no experience with User Groups or sites like Meetup (the only think I know is that a small contribution fee is required to create a Meetup), do you have any? Basically I think the trickiest part would be to find a place to keep the meetings: I could ask to my employer, but it's unlikely it would gives us permission to use company's premises outside working hours. Any idea? Happy new year! A. On 1 January 2013 18:55, David Turner d.tur...@tracsis.com wrote: On 01/01/2013 16:19, Blake Rain wrote: Hi Alfredo, I live in Leeds, which is not far from Manchester. I'd be up for a user group nearby, so will +1 your user group :) Similarly for me - I'm Leeds based and would be interested in joining in. Please sign me up! Cheers, David T Cheers, On 30 December 2012 15:15, Alfredo Di Napoli alfredo.dinap...@gmail.com mailto:alfredo.dinapoli@**gmail.com alfredo.dinap...@gmail.com wrote: Hey, thanks for the response :) Mine was more a small survey to see if we are enough to think about creating a small user group and see each other once a month or whenever :) Cheers, A. On 30 December 2012 15:58, Mateusz Kowalczyk fuuze...@fuuzetsu.co.uk mailto:fuuze...@fuuzetsu.co.**ukfuuze...@fuuzetsu.co.uk wrote: Greetings, I'm currently residing in Bury, a metrolink ride away from Manchester. Unfortunately, I'm only here for Christmas holidays and am leaving tomorrow so a meeting is unlikely. I don't think that I'd be a good conversation partner anyway as my knowledge is still quite limited. I'd love to hear whether you find any other people though. It would be nice if some Haskell talks could be held in the area if there are enough people. Good luck on your search, Mateusz Kowalczyk On 30/12/12 14:38, Alfredo Di Napoli wrote: Morning Cafe, I've been living in Manchester for 1 month now and I'm wondering if some on you are from the Greater Manchester area, so that we could chat about out beloved language in front of a glass of ale / tea :P Happy new year to everyone! A. __**_ Haskell-Cafe mailing list Haskell-Cafe@haskell.org mailto:Haskell-Cafe@haskell.**orgHaskell-Cafe@haskell.org http://www.haskell.org/**mailman/listinfo/haskell-cafehttp://www.haskell.org/mailman/listinfo/haskell-cafe __**_ Haskell-Cafe mailing list Haskell-Cafe@haskell.org mailto:Haskell-Cafe@haskell.**orgHaskell-Cafe@haskell.org http://www.haskell.org/**mailman/listinfo/haskell-cafehttp://www.haskell.org/mailman/listinfo/haskell-cafe __**_ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/**mailman/listinfo/haskell-cafehttp://www.haskell.org/mailman/listinfo/haskell-cafe -- David Turner Senior Consultant Tracsis PLC Tracsis PLC is a company registered in England and Wales with number 5019106. __**_ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/**mailman/listinfo/haskell-cafehttp://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Mancunian Haskellers out there?
Morning Cafe, I've been living in Manchester for 1 month now and I'm wondering if some on you are from the Greater Manchester area, so that we could chat about out beloved language in front of a glass of ale / tea :P Happy new year to everyone! A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Mancunian Haskellers out there?
Hey, thanks for the response :) Mine was more a small survey to see if we are enough to think about creating a small user group and see each other once a month or whenever :) Cheers, A. On 30 December 2012 15:58, Mateusz Kowalczyk fuuze...@fuuzetsu.co.ukwrote: Greetings, I'm currently residing in Bury, a metrolink ride away from Manchester. Unfortunately, I'm only here for Christmas holidays and am leaving tomorrow so a meeting is unlikely. I don't think that I'd be a good conversation partner anyway as my knowledge is still quite limited. I'd love to hear whether you find any other people though. It would be nice if some Haskell talks could be held in the area if there are enough people. Good luck on your search, Mateusz Kowalczyk On 30/12/12 14:38, Alfredo Di Napoli wrote: Morning Cafe, I've been living in Manchester for 1 month now and I'm wondering if some on you are from the Greater Manchester area, so that we could chat about out beloved language in front of a glass of ale / tea :P Happy new year to everyone! A. ___ Haskell-Cafe mailing listHaskell-Cafe@haskell.orghttp://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANNOUNCE: haskell-docs - Given a module name and a name, it will find and display the documentation of that name.
Excellent work, Chris! Looking forward to using your tool! Ciao! Alfredo Sent from my iPad On 27/dic/2012, at 01:43, Christopher Done chrisd...@gmail.com wrote: Ahoy hoy, Just thought I'd announce a tool I whipped up these evening to take a module name and a name and output the installed Haddock documentation for it. Examples with my GHCi session: λ :doc Data.List.Split split Split a list according to the given splitting strategy. This is how to run a Splitter that has been built using the other combinators. λ :doc Control.Concurrent.MVar swapMVar Take a value from an MVar, put a new value into the MVar and return the value taken. This function is atomic only if there are no other producers for this MVar. λ :doc Data.List sort Ambiguous module, belongs to more than one package: base haskell2010-1.1.0.1 Continuing anyway... Package: base The sort function implements a stable sorting algorithm. It is a special case of sortBy, which allows the programmer to supply their own comparison function. Please have a play with it, the package is at: http://hackage.haskell.org/package/haskell-docs It has installation instructions. Feel free to share any issues that you have, either here, or on the Github page: https://github.com/chrisdone/haskell-docs There are some issues to do with versioning that I'm not sure how to solve in a standard way. The obvious next step is to have a -package-conf flag so that it can be used with cabal-dev. The wizards on #haskell are currently thinking of a way to avoid having to write the module name and just use what's in scope. Ciao! ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] LGPL and Haskell (Was: Re: ANNOUNCE: tie-knot library)
Let me just chime in to give my 2 cents; I quote Micheal 100%; if we want to push Haskell out of the academic/open source world to the real world, well, GPL is not the way to go, due to its viral nature. Cheers, A. On 13 December 2012 08:09, Michael Snoyman mich...@snoyman.com wrote: To take this out of the academic realm and into the real-life realm: I've actually done projects for companies which have corporate policies disallowing the usage of any copyleft licenses in their toolset. My use case was a web application, which would not have been affected by a GPL library usage since we were not distributing binaries. Nonetheless, those clients would not have allowed usage of any such libraries. You can argue whether or not this is a good decision on their part, but I don't think the companies I interacted with were unique in this regard. So anyone who's considering selling Haskell-based services to companies could very well be in a situation where any (L)GPL libraries are non-starters, regardless of actual legal concerns. This affects the open source realm as well, because I think many of us want our libraries to be commercial-friendly (I know this is the case for Yesod). As one specific data point, I initially created the markdown package[1] because I couldn't use pandoc[2] in one of these situations due to its GPL license. MIchael [1] http://hackage.haskell.org/package/markdown [2] http://hackage.haskell.org/package/pandoc On Thu, Dec 13, 2012 at 10:00 AM, Petr P petr@gmail.com wrote: Hi Felipe, thanks for making me think about the licenses. Without your suggestion, I wouldn't be aware of problems LGPL might cause for Haskell projects. And I'm considering the possibility of using BSD (or a similar) license in the future. I'm aware of the issues you pointed out. As you say, since tie-knot is a small library, it's not really that important what license it has, it's easy to re-implement it if needed. And, until some else contributes to the library, anybody can ask me to release the code under a different license, if needed. I'd say that the recent debate was a bit academic. (That wasn't bad at all, it clarified many things for me.) Nobody actually said I want to use the library, but I cannot because of the license. Also we're talking about LGPL, not GPL, and this makes thing different. Consider this: All packages on Hackage have published their source codes. (More than 95% are open source, and it's likely that those in OtherLicence are too.) With public source codes, there is no problem using a LGPL-ed library! Anybody can write a BSD licensed program which uses a LGPL library, and because all sources are public, the requirement to allow re-linking is easily satisfied. And nobody is forced to (L)GPL (unless the library is modified). We can freely mix open-source projects that use LGPL and non-copyleft licenses. The LGPL problem manifests only when someone wants to keep source codes secret - then (s)he is forced to solve the problem with re-linking. [With GPL, this would be very different, the whole project would have to be GPL no matter what.] I think it would be interesting to make some kind of poll to see what kind of software Haskell community writes (FOSS vs closed source) and what licensing issues people have. But the usual problem with such polls is that only people who have problems vote, so the results are very biased. Best regards, Petr 2012/12/12 Felipe Almeida Lessa felipe.le...@gmail.com When deciding what license to use, I think one should also think about the role of their library. For example, containers is quite central to the Haskell community and not easily replaceable. The tie-knot library, OTOH, may be rewritten from scratch or even just skipped (just tie the knot yourself). A GPLed containers forces the library user to somehow get a way of complying to the license. A GPLed tie-knot, OTOH, may be just ignored. What I'm trying to say is that if your library is nice but someone may just rewrite it without much effort, then using GPL will just drive potential users of your library away, which is bad not just for the library but also for those potential users as well. Perhaps you have a nice library but it may be replaced (with some small pain) by another, similar library. (In particular, I'm not saying that tie-knot is a library that should be ignored. On the contrary, I think it's quite nice and it would be a shame if I had to ignore it when tying a knot just because of its restrictive license.) Of course, if everything on Hackage was GPLed, then it wouldn't make sense to release something as BSD as you wouldn't be able to use it anyway. But the reality right now is that we have: (Apache,3) (BSD3,3359) (BSD4,3) (MIT,269) (PublicDomain,142) (GPL,409) (GPL-2,27) (GPL-3,147) (LGPL,138) (LGPL-2,2) (LGPL-2.1,25) (LGPL-3,21) (OtherLicense,179) This data comes from a
Re: [Haskell-cafe] To my boss: The code is cool, but it is about 100 times slower than the old one...
Hi there, I'm only an amateur so just my 2 cent: Haskell can be really fast, but reaching that speed can be all but trivial: you need to use different data types (e.g. ByteString vs. the normal String type) relies on unconventional IO (e.g. Conduit, Iterateee) and still be ready to go out of the base, using packages and functions wich are not in base/haskell platform (e.g. mwc-random). My 2 cents :) A. On 29 November 2012 18:09, Fixie Fixie fixie.fi...@rocketmail.com wrote: Hi all haskellers I every now and then get the feeling that doing my job code in Haskell would be a good idea. I have tried a couple of times, but each time I seem to run into performance problems - I do lots of heavy computing. The problem seems to be connected to lazy loading, which makes my programs so slow that I really can not show them to anyone. I have tried all tricks in the books, like !, seq, non-lazy datatypes... I was poking around to see if this had changed, then I ran into this forum post: http://stackoverflow.com/questions/9409634/is-indexing-of-data-vector-unboxed-mutable-mvector-really-this-slow The last solution was a haskell program which was in the 3x range to C, which I think is ok. This was in the days of ghc 7.0 I then tried compile the programs myself (ghc 7.4.1), but found that now the C program now was more that 100x faster. The ghc code was compiled with both O2 and O3, giving only small differences on my 64-bit Linux box. So it seems something has changed - and even small examples are still not safe when it comes to the lazy-monster. It reminds me of some code I read a couple of years ago where one of the Simons actually fired off a new thread, to make sure a variable was realized. A sad thing, since I am More that willing to go for Haskell if proves to be usable. If anyone can see what is wrong with the code (there are two haskell versions on the page, I have tried the last and fastest one) it would also be interesting. What is your experience, dear haskellers? To me it seems this beautiful language is useless without a better lazy/eager-analyzer. Cheers, Felix ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANNOUNCE: language-java 0.2.0
Thanks for the effort! Now, what about some documentation? :P Cheers, A. On 27 November 2012 18:26, Vincent Hanquez t...@snarc.org wrote: Hi Cafe, with the approval of Niklas, the original author and maintainer, i'll be maintaining language-java for now. I've uploaded a new version on hackage [1] with some minor improvements and the repository is now hosted on github [2]. Thanks Niklas for language-java ! [1] http://hackage.haskell.org/**package/language-javahttp://hackage.haskell.org/package/language-java [2] http://github.com/vincenthz/**language-java/http://github.com/vincenthz/language-java/ -- Vincent __**_ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/**mailman/listinfo/haskell-cafehttp://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] A small step towards solving cabal hell.
Hi Tim, it seems a good idea, although I hardly believe such isolation is achievable in practice. Just a feeling, though :) However, I really hope we, as a community, will be able to finally fix the Cabal Hell. It's a topic with a lot of hype lately, but few practical, hands dirty approaches :) Cheers, Alfredo On 18 November 2012 13:33, timothyho...@seznam.cz wrote: I've read a lot of negative regarding the problems with cabal and hackage. I've written quite a few of them myself. I want to propose a simple change in philosophy of packages. Haskell has inherited a philosophy from the imperative world, that there are two types of packages: Libraries and applications. Libraries are big collections of modules. Applications are big collections of modules. There is a difference from the perspective of the build system. Applications are big collections of modules that belong together and mutually rely upon each other for the application to work. Such that if one module is missing, the application cannot build and thus cannot do useful tasks. If an application doesn't build, then the maintainer has to go and fix that problem. This isn't perfect, I do not solve this problem in this email. Libraries don't always have this property. For example, XMonad.Layout.Columnhttp://hackage.haskell.org/packages/archive/xmonad-contrib/0.10/doc/html/XMonad-Layout-Column.htmlhas no mutual dependency on XMonad.Layout.Circlehttp://hackage.haskell.org/packages/archive/xmonad-contrib/0.10/doc/html/XMonad-Layout-Circle.html . This is a feature of libraries that can and should be taken advantage of wherever possible :) We can and should, break up libraries into books. I hold this opinion, because libraries are hard to maintain. If xmonad-contrib refuses to build, I open up it's source code, and see some hundred modules. I cannot, as a non-xmonad developer, imagine myself fixing such a large library. But if it was just one small module from that library I wanted, and it refused to build, and I opened it up, and there were just 3 files there. I wouldn't feel so overwhelmed. I would fix the problem myself. What I'm trying to say, is that books (small packages containing 3 modules or less) are so easy to maintain, that they really need no maintainer at all. Any idiot can fix one. But libraries, with their hundreds of modules, and seemingly endless dependencies, Can be much harder to maintain, and require a knowledgeable maintainer. So lets stop publishing libraries, and maintaining libraries, and listening to people crying when libraries don't build, and lets start writing books, and publishing really small packages, that are so simple anyone can fix them when they break even when they have no in depth knowledge of the package. Lets make a new guideline for libraries that if it is possible to split a library into two or more, non-mutually dependent parts, than we *should* split them such. Timothy PS, I noticed that yesod is already a collection of books, but it appears to me, that these packages are STILL mutually dependent :( ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Announce: Haskell Platform 2012.4.0.0
Thanks! Best news of the day! :) A. On 6 November 2012 08:54, Mark Lentczner mark.lentcz...@gmail.com wrote: I'm pleased to announce that Haskell Platform 2012.4.0.0http://www.haskell.org/platform/index.html#2012.4.0.0is now available. This release contains three new packages to the platform: - async-2.0.1.3http://lambda.haskell.org/platform/doc/current/packages/async-2.0.1.3/doc/html/index.html - split-0.2.1.1http://lambda.haskell.org/platform/doc/current/packages/split-0.2.1.1/doc/html/index.html - vector-0.10.0.1http://vector-0.10.0.1http://lambda.haskell.org/platform/doc/current/packages/vector-0.10.0.1/doc/html/index.html The remainder of the changes are small updates to the versions of GHC (now 7.4.2) and several other packages. Installers for Windows http://www.haskell.org/platform/windows.html, Mac OS X http://www.haskell.org/platform/mac.html, and the source tar ballhttp://www.haskell.org/platform/linux.htmlare all now available from the site. Linux distribution packages should be available shortly. On behalf of the Haskell Platform teamhttp://trac.haskell.org/haskell-platform/wiki/Members , - Mark mzero Lentczner, Release Manager ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Is XMonad still developed or with a current maintainer?
The point is, I think it would be beneficial for XMonad to merge efforts in one one point. For this reason I've contacted Adam (the current maintainer) and asked him if I could co-maintain XMonad. The point is trying to make all our efforts in only one point. This is an excerpt of what I've told him: Thanks for the quick reply. if you would like to, we can co-maintain Xmonad. I've been using it for six months now and became such an invaluable tool that Os X aqua interface sucks when I use it :) I will be pretty busy until the end of the year, because I just landed a new job abroad and I'm in the process of relocating, bUt i'll have plenty of spare time this winter to hack on Xmonad. I have great plans for our lovely window manager, including: 1) a new website, the current is nice but too geeky and old. Capturing user interest through a cool website is very important imho 2) move Xmonad repo to github. this may sound heretical, but a lot of people (me included) are put off by Darcs. Git and github is such an effective tool that can't be ignored any longer. Furthermore, there is a lot of hype this days for osxmonad, which apparently build upon Xmonad, reusing it as much as possible. They are on github too. Working thightly with them we could create a family of product, with a bulk core (microkernel) and different adaption layer according to the Os (linux rather then mac os x) Your fork could be a starting point, we could merge everything under one, centralized repo on github, switching for a user based account to an organization profile (XMonadWM or simply XMonad are two possible names, for example). As soon as I get a reply for Adam I'll inform you! Bye! A. On 6 November 2012 12:23, Johan Brinch brin...@gmail.com wrote: On Mon, Nov 5, 2012 at 8:38 AM, Alfredo Di Napoli alfredo.dinap...@gmail.com wrote: looking at the Darcs repo it seems that something is happening, but XMonad wasn't updated in a year on Hackage and everything seems to be still. Is XMonad still actively developed? If yes, who is the current maintainer? It would be good to have him listed in the Hackage package description, in order to contact him. Atm there is one generic email that seems not to be read very often :) Me and a couple others from the University of Copenhagen are running a fork of both XMonad and XMonadContrib here: https://github.com/reenberg/xmonad https://github.com/reenberg/XMonadContrib Jesper Reenberg is in charge and we're patching bugs in our spare time. We're both running this version daily (it's not bug free, but it's stable enough). -- Johan Brinch ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Is XMonad still developed or with a current maintainer?
Ah! The choice of an official maintainer is secondary, imo. It could be any of you, me, or whatever. I think that what is really important is to have a centralized point of convergence :) Bye! A. On 6 November 2012 12:31, Alfredo Di Napoli alfredo.dinap...@gmail.comwrote: The point is, I think it would be beneficial for XMonad to merge efforts in one one point. For this reason I've contacted Adam (the current maintainer) and asked him if I could co-maintain XMonad. The point is trying to make all our efforts in only one point. This is an excerpt of what I've told him: Thanks for the quick reply. if you would like to, we can co-maintain Xmonad. I've been using it for six months now and became such an invaluable tool that Os X aqua interface sucks when I use it :) I will be pretty busy until the end of the year, because I just landed a new job abroad and I'm in the process of relocating, bUt i'll have plenty of spare time this winter to hack on Xmonad. I have great plans for our lovely window manager, including: 1) a new website, the current is nice but too geeky and old. Capturing user interest through a cool website is very important imho 2) move Xmonad repo to github. this may sound heretical, but a lot of people (me included) are put off by Darcs. Git and github is such an effective tool that can't be ignored any longer. Furthermore, there is a lot of hype this days for osxmonad, which apparently build upon Xmonad, reusing it as much as possible. They are on github too. Working thightly with them we could create a family of product, with a bulk core (microkernel) and different adaption layer according to the Os (linux rather then mac os x) Your fork could be a starting point, we could merge everything under one, centralized repo on github, switching for a user based account to an organization profile (XMonadWM or simply XMonad are two possible names, for example). As soon as I get a reply for Adam I'll inform you! Bye! A. On 6 November 2012 12:23, Johan Brinch brin...@gmail.com wrote: On Mon, Nov 5, 2012 at 8:38 AM, Alfredo Di Napoli alfredo.dinap...@gmail.com wrote: looking at the Darcs repo it seems that something is happening, but XMonad wasn't updated in a year on Hackage and everything seems to be still. Is XMonad still actively developed? If yes, who is the current maintainer? It would be good to have him listed in the Hackage package description, in order to contact him. Atm there is one generic email that seems not to be read very often :) Me and a couple others from the University of Copenhagen are running a fork of both XMonad and XMonadContrib here: https://github.com/reenberg/xmonad https://github.com/reenberg/XMonadContrib Jesper Reenberg is in charge and we're patching bugs in our spare time. We're both running this version daily (it's not bug free, but it's stable enough). -- Johan Brinch ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Is XMonad still developed or with a current maintainer?
You have catch all my points, good to see what there is someone who agrees with me :) I don't care who is the maintainer either, because a community-driven repo on github would be a great deal more effective. After all, the maintainer is the person that updates and push the package on Hackage, keep it updated and so on and so forth. Is the social coding era, I think these are all tasks that could be performed by the XMonad community :) As soon as I get info from Adam I'll keep you posted :) A. On 6 November 2012 12:40, Johan Brinch brin...@gmail.com wrote: On Tue, Nov 6, 2012 at 12:33 PM, Alfredo Di Napoli alfredo.dinap...@gmail.com wrote: Ah! The choice of an official maintainer is secondary, imo. It could be any of you, me, or whatever. I think that what is really important is to have a centralized point of convergence :) Very good to see some interest in the code base ;-) Maybe you should also check the IRC channel? #xmonad at freenode. There's a lot of people in there. I agree, that it would be good to merge the repositories, and I'd prefer GitHub for hosting. I don't care who's the maintainer, except it should be someone who's available and has the time and interest (a fellow user). Whether it's our repository or somewhere else, I don't really care, as long as we can commit to it without too much hassle. Maybe we could finally get those bugs in core fixed ;-) Anyway, let me know when you hear something. -- Johan Brinch ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Is XMonad still developed or with a current maintainer?
Anyone knows something? On 5 November 2012 08:38, Alfredo Di Napoli alfredo.dinap...@gmail.comwrote: Hi guys, looking at the Darcs repo it seems that something is happening, but XMonad wasn't updated in a year on Hackage and everything seems to be still. Is XMonad still actively developed? If yes, who is the current maintainer? It would be good to have him listed in the Hackage package description, in order to contact him. Atm there is one generic email that seems not to be read very often :) Cheers, A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Is XMonad still developed or with a current maintainer?
Hey Roman, thanks for the tip. I will also try on the irc channel, hoping to find someone :) Cheers, A. On 5 November 2012 15:45, Roman Cheplyaka r...@ro-che.info wrote: The generic email (xmo...@haskell.org) is the xmonad mailing list [1]. However, if you are not subscribed, your emails might get dropped or be kept in the moderation queue. So I suggest subscribing and trying again. [1]: http://www.haskell.org/mailman/listinfo/xmonad Roman * Alfredo Di Napoli alfredo.dinap...@gmail.com [2012-11-05 15:21:08+0100] Anyone knows something? On 5 November 2012 08:38, Alfredo Di Napoli alfredo.dinap...@gmail.com wrote: Hi guys, looking at the Darcs repo it seems that something is happening, but XMonad wasn't updated in a year on Hackage and everything seems to be still. Is XMonad still actively developed? If yes, who is the current maintainer? It would be good to have him listed in the Hackage package description, in order to contact him. Atm there is one generic email that seems not to be read very often :) ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Is XMonad still developed or with a current maintainer?
Hi guys, looking at the Darcs repo it seems that something is happening, but XMonad wasn't updated in a year on Hackage and everything seems to be still. Is XMonad still actively developed? If yes, who is the current maintainer? It would be good to have him listed in the Hackage package description, in order to contact him. Atm there is one generic email that seems not to be read very often :) Cheers, A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANNOUNCE: pretty-tree
The idea is pretty good, although I suggest you make clickable the Haddock's link to modules, because I had to navigate the source in order to find some application as well as nice tree visualizations :) Cheers, A. On 26 October 2012 14:58, Ivan Lazar Miljenovic ivan.miljeno...@gmail.comwrote: For a project I'm working on, I got sick of writing out trees by hand. Data.Tree has a drawTree function, but whilst it's better than nothing, I prefer a more top-down traditional approach to drawing trees. So I wrote a package to do just that: http://hackage.haskell.org/package/pretty-tree (I didn't think to check whether diagrams had capabilities to do so until after I finished, though in this case I prefer a textual approach anyway.) I'm more than happy to consider adding other forms of drawing trees (though off-hand I can't think of any), or of course you can send me patches since I'm taking advantage of the nice new shiny hub.darcs.net (thanks Darcs team!). I was going to put an example here but it only really comes out nicely if you're using a monospaced font, so have a look at the Haddock docs for the module once Hackage builds it (in hindsight, I should probably have come up with better labels before releasing the package... oh well :) -- Ivan Lazar Miljenovic ivan.miljeno...@gmail.com http://IvanMiljenovic.wordpress.com ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] A clarification about what happens under the hood with foldMap
Thanks guys for the clarification, this blowed my mind a bit :P As far as I understood, is that my initial thought about Sum and Product was wrong; in fact, they don't even participate to the party! This is confirmed by the Oleg's paradox about (-). What really happens is that Endo (which I guess is the endofunctor, so a functor from X to X itself) act as a semantic bridge between the operation to perform (+,* or whatever) and our foldable structure. Have I got the gist? Thanks a lot! A. On 24 October 2012 02:22, John Lato jwl...@gmail.com wrote: From: Alfredo Di Napoli alfredo.dinap...@gmail.com Subject: [Haskell-cafe] A clarification about what happens under the hoodwith foldMap I'm sure I'm missing a point, but the minimum definition for a Foldable instance is given in terms of foldMap, so I get the cake for free, foldr included, right? In the example I have defined my treeSum as: treeSum = Data.Foldable.foldr (+) 0 So the only thing Haskell knows it that I want to fold over a Foldable for which foldMap (and therefore foldr) is defined, and specifically I want to fold using (+) as function. But foldMap is defined in terms of f, which in this case is Sum, because I want to sum things. It it were (*) f would have been Product, right? So what I'm missing is the relation between foldMap and foldr, aka How Haskell infer from (+) that I want f = Sum and not something different? What you're missing is that this isn't how foldr is defined. As you probably suspect, it isn't possible for Haskell to deduce f = Sum from just the function. And in general the function parameter to foldr isn't even equivalent to mappend for any monoid, because it operates on two values with different types. Rather, foldr is defined using the Endo monoid, which is newtype Endo a = Endo (a - a) instance Monoid (Endo a) where mempty = id mappend = (.) Here's the default instance of Data.Foldable.foldr foldr :: (a - b - b) - b - t a - b foldr f z t = appEndo (foldMap (Endo . f) t) z What happens is that, as the tree is traversed, Leaf constructors are replaced with 'id' (mempty :: Endo b), and branch values are replaced with 'Endo . f', where f = (+) in this example. Look at Endo . f: -- Endo :: (b - b) - Endo b -- f :: a - (b - b) -- Endo . f :: a - Endo b so at each branch (Endo . f) is applied to the value, resulting in the type 'Endo b' foldMap just composes everything together with mappend, which, after the Endo constructor is removed, is a giant function pipeline :: b - b, which is then applied to the provided base value (0 here). John L. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANN: Cabal-1.16.0.2 and cabal-install-1.16.0.1
Thanks Johan and thanks to all the guys behind Cabal :) Cheers, A. On Wed, Oct 24, 2012 at 09:42:48AM -0700, Johan Tibell wrote: Hi, On behalf of the cabal contributors, I'm proud to announce bugfix releases of Cabal and cabal-install. Here's a complete list of changes since the last release: Since Cabal-1.16.0.1: * Bump Cabal version number to 1.16.0.2 * Fixed warnings on the generated Paths module. The warnings are generated by the flag '-fwarn-missing-import-lists'. Since cabal-install-1.16.0: * Have bootstrap.sh use Cabal-1.16.0.2 * Fix installing from custom folder on Linux (#1058) * Change bootstrap.sh to require Cabal = 1.16 1.18 * Bump cabal-install version number to 1.16.0.1 * Bump network dependency in bootstrap.sh to 2.3.1.1 * Fix compilation error * Disable setting the jobs: $nprocs line in default ~/.cabal config * Fix building cabal-install with ghc-6.12 and older I expect this to be the last release from the 1.16 branch. I intend to make another in about 3 months, or a bit sooner if the sandboxing work is ready earlier. Cheers, Johan ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] A clarification about what happens under the hood with foldMap
Hi Cafe, I was playing with the classic example of a Foldable structure: Trees. So the code you can find both on Haskell Wiki and LYAH is the following: data Tree a = Empty | Node (Tree a) a (Tree a) deriving (Show, Eq) instance Foldable Tree where foldMap f Empty = mempty foldMap f (Node l p r) = foldMap f l `mappend` f p `mappend` foldMap f r treeSum :: Tree Int - Int treeSum = Data.Foldable.foldr (+) 0 What this code does is straighforward. I was struck from the following sentences in LYAH: Notice that we didn't have to provide the function that takes a value and returns a monoid value. We receive that function as a parameter to foldMap and all we have to decide is where to apply that function and how to join up the resulting monoids from it. This is obvious, so in case of (+) f = Sum, so f 3 = Sum 3 which is a Monoid. What I was wondering about is how Haskell knows that it has to pass, for example, Sum in case of (+) and Product in case of (*)? In other term, I'm missing the logical piece of the puzzle which maps the associative binary function passed to fold up to our foldMap declaration. Thanks for any explanation :) Cheers, A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] A clarification about what happens under the hood with foldMap
-- Forwarded message -- From: Alfredo Di Napoli alfredo.dinap...@gmail.com Date: 23 October 2012 10:35 Subject: Re: [Haskell-cafe] A clarification about what happens under the hood with foldMap To: Chaddaï Fouché chaddai.fou...@gmail.com I'm sure I'm missing a point, but the minimum definition for a Foldable instance is given in terms of foldMap, so I get the cake for free, foldr included, right? In the example I have defined my treeSum as: treeSum = Data.Foldable.foldr (+) 0 So the only thing Haskell knows it that I want to fold over a Foldable for which foldMap (and therefore foldr) is defined, and specifically I want to fold using (+) as function. But foldMap is defined in terms of f, which in this case is Sum, because I want to sum things. It it were (*) f would have been Product, right? So what I'm missing is the relation between foldMap and foldr, aka How Haskell infer from (+) that I want f = Sum and not something different? I hope to have been clearer, don't know if I'm missing something crucial, though :) Thanks, A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] A clarification about what happens under the hood with foldMap
Thanks guys, I'll work my way through Oleg's paradox as well as what you just said Chaddai. I'm very busy right now, but I'll probably come back to you tomorrow morning, when I'll have an hour to think freely :) Cheers, A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] How to correctly benchmark code with Criterion?
I don't know if you have already read them, but Tibell's slides on High Performance Haskell are pretty good: http://www.slideshare.net/tibbe/highperformance-haskell There is a section at the end where he runs several tests using Criterion. HTH, A. On 18 October 2012 11:45, Claude Heiland-Allen cla...@mathr.co.uk wrote: Hi Janek, On 18/10/12 10:23, Janek S. wrote: during past few days I spent a lot of time trying to figure out how to write Criterion benchmarks, so that results don't get skewed by lazy evaluation. I want to benchmark different versions of an algorithm doing numerical computations on a vector. For that I need to create an input vector containing a few thousand elements. I decided to create random data, but that really doesn't matter - I could have as well use infinite lists instead of random ones. [snip] The question is how to generate data so that its evaluation won't be included in the benchmark. Something like this might work, not sure what the canonical way is. ---8--- main = do ... let input = L.dataBuild gen evaluate (rnf input) defaultMain ... bench Lists $ nf L.benchThisFunction input ... ---8--- I did use something like this in practice here: https://gitorious.org/bitwise/**bitwise/blobs/master/extra/** benchmark.hs#line155https://gitorious.org/bitwise/bitwise/blobs/master/extra/benchmark.hs#line155 Thanks, Claude -- http://mathr.co.uk __**_ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/**mailman/listinfo/haskell-cafehttp://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] poor performance when generating random text
What about this? I've tested on my pc and seems pretty fast. The trick is
to generate the gen only once. Not sure if the inlines helps, though:
import qualified Data.Text as T
import System.Random.MWC
import Control.Monad
import System.IO
import Data.ByteString as B
import Data.Word (Word8)
import Data.ByteString.Char8 as CB
{- | Converts a Char to a Word8. Took from MissingH -}
c2w8 :: Char - Word8
c2w8 = fromIntegral . fromEnum
charRangeStart :: Word8
charRangeStart = c2w8 'a'
{-# INLINE charRangeStart #-}
charRangeEnd :: Word8
charRangeEnd = c2w8 'z'
{-# INLINE charRangeEnd #-}
--genString :: Gen RealWorld - IO B.ByteString
genString g = do
randomLen - uniformR (50 :: Int, 450 :: Int) g
str - replicateM randomLen $ uniformR (charRangeStart, charRangeEnd) g
return $ B.pack str
writeCorpus :: FilePath - IO [()]
writeCorpus file = withFile file WriteMode $ \h - do
let size = 10
_ - withSystemRandom $ \gen -
replicateM size $ do
text - genString gen :: IO B.ByteString
CB.hPutStrLn h text
return [()]
main :: IO [()]
main = writeCorpus test.txt
A.
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Re: [Haskell-cafe] poor performance when generating random text
Glad to have been helpful :) Bests, Alfredo Sent from my iPad On 17/ott/2012, at 21:10, Dmitry Vyal akam...@gmail.com wrote: On 10/17/2012 12:45 PM, Alfredo Di Napoli wrote: What about this? I've tested on my pc and seems pretty fast. The trick is to generate the gen only once. Not sure if the inlines helps, though: What about this? I've tested on my pc and seems pretty fast. The trick is to generate the gen only once. Not sure if the inlines helps, though ... Wow, haskell-cafe is a wonderful place! In just a two hours program run time automagically improved 20x ;) Thanks Alfredo, code works wonderful. Compared to mine implementation it's 2.5 sec vs 50 sec on my laptop. Interesting, how it compares to C now. Inlining makes about 50x difference when code compiled without optimization. A nice example. Best wishes, Dmitry ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] I would like a clarification about Enumerators and Iteratees, please :)
Hi guys, I've started playing with Iteratee and Enumerators: very cool and addictive stuff. I have wrote this simple code: https://gist.github.com/3899017 In a nutshell, it gives back the number of occurences for a single char in case the argument passed from the command line is a single char, or the number of lines of the entire file. I've tried it first on a small file (~100MB) and then on a huge one (~3GB). As far as I understood Iteratee IO should be a smart way to do IO, avoiding to keep the entire file in memory; what I observe in the second case, instead, is a sort of memory leak. The memory grows and grows until the entire machine hangs. If I split the huge file in small chunks, memory comsumption is still high but the computation terminates and is fast. So my two questions: a) What am I missing? Should be memory used be constant? And how can I achieve this purpose? b) I'm using the package enumerator because as far as I can see is the most used. How does it compares with iteratee? Which of the two are more performant? Bye and thanks, A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANNOUNCE: test-framework-golden-1.1
That's cool, thank you. A. Sent from my iPad On 04/ott/2012, at 23:55, Roman Cheplyaka r...@ro-che.info wrote: I am glad to announce the first public release of test-framework-golden — a golden testing library. Hackage: http://hackage.haskell.org/package/test-framework-golden GitHub: https://github.com/feuerbach/test-framework-golden Golden tests are similar to unit tests (as implemented in HUnit), but the idea is to store the expected result in files (called «golden» files). I was introduced to the idea of golden testing by Bohdan Vlasyuk at ZuriHac in 2010. Since then I've discovered that this is a nice approach and it is already used in variety of projects (e.g. ghc, haddock). Surprisingly, not much is written about golden testing, and I've been unable to find any golden testing libraries for Haskell or any other programming language. Every project has its own ad-hoc implementation in Haskell/Python/Shell/etc. The closest match on the market is Simon Michael's shelltestrunner. But to use it you have to expose the tested functionality via command line, which may be inconvenient. So this is my attempt at a general golden testing library. It consists of two modules. Test.Golden has a simple interface that helps you get started very quickly. Test.Golden.Advanced provides a very generic testing function that you can use to implement the testing system you dream about. The library is integrated with test-framework, so you can use golden tests in addition to SmallCheck/QuickCheck/HUnit tests. In future there's a plan to support some golden test management capabilities. Roman ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Explicitly passing an argument to an arrow
Hello everyone, sorry for the dumb question but I'm wrapping my head around arrow just from this morning. Consider this toy function to swap argument of a tuple: swapA' :: (Arrow a) = a ((b,c), (b,c)) (c,b) swapA' = swapFirst swapSecond where swapFirst = first $ arr snd swapSecond = second $ arr fst It works but requires to pass a tuple of tuple, namely ((b,c), (b,c)). How can I explicitly pass my tuple of tuple to swapFirst so I can simply invoke swapA' (1,2) and get the correct result? ps. I know that swap can be easily and elegantly be written as: swap = snd fst but the point of the exercise was to experiment with first, second and arrow concatenation Thanks in advance, Alfredo ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Explicitly passing an argument to an arrow
Thanks Brent, this should do the trick, although what I was asking was something more general: For explicitly pass I meant passing them without the eta reduce, in other terms: swapA' :: (Arrow a) = a ((b,c), (b,c)) (c,b) swapA' t = () swapFirst swapSecond (???) where swapFirst = first $ arr snd swapSecond = second $ arr fst where the question marks indicate that I don't know how to tell swapFirst hey, even though from the outside I'm passing you a tuple *t*, you have to take as input a (t,t). Hope this is clearer or it has some sense at all, maybe I'm not getting correctly the way arrows work! bye, A. Like this? swapA' = dup swapFirst swapSecond where dup = id id ... I'm afraid I'm not confident I really understand your question, however, so if that doesn't answer it, try asking again! -Brent ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Explicitly passing an argument to an arrow
I see. There exists an equivalent version but more generic? Just out of curiosity, I'm still pretty new to arrows, as you may have read :) Thanks, A. On 3 October 2012 15:59, Ertugrul Söylemez e...@ertes.de wrote: Alfredo Di Napoli alfredo.dinap...@gmail.com wrote: Solution was simple, after reading that functions are arrows: swapA' t = (swapFirst swapSecond) (t,t) where swapFirst = first snd swapSecond = second fst No, that's not a solution, unless a = (-) is acceptable. This code is specific to the function arrow. Greets, Ertugrul -- Key-ID: E5DD8D11 Ertugrul Soeylemez e...@ertes.de FPrint: BD28 3E3F BE63 BADD 4157 9134 D56A 37FA E5DD 8D11 Keysrv: hkp://subkeys.pgp.net/ ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] [ANN] Cumino 0.2 - Now supports pretty indentation through stylish-haskell
Ok, I've added the support for urxvt. Bear in mind that it partially support urxvt, though: it works fine if you run GVim or Vim outside an already running tmux session, otherwise it won't start. The problem is due to the fact urxvt believes that the new session is launched within the running tmux session, whining about nested tmux session and not starting at all. You can unset the $TERM variable as workaround, but I don't like that apporach. If you come up with an alternative solution please let me know :) A. On 13 September 2012 16:16, Alfredo Di Napoli alfredo.dinap...@gmail.comwrote: If I remember correctly, I've also tried that combinations, without success. Anyway, I'm not at work so I can't test Cumino against gnome and Xmonad until tomorrow morning: I'll keep you posted! Bye, Alfredo I think you misunderstood; as I read it (and as I would expect it to work given the above descrtiption) that would be urxvt --hold -e sh -c 'echo a' -- brandon s allbery allber...@gmail.com wandering unix systems administrator (available) (412) 475-9364vm/sms ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] [ANN] Cumino 0.2 - Now supports pretty indentation through stylish-haskell
Sorry the typo, the variable is $TMUX and controls the nesting ot tmux session. It turns out that if affect not only urxvt but also xterm and gnome-terminal. Perhaps it could be useful to unset it programmatically, I'll keep you posted if I find a workaround. A. On 14 September 2012 06:14, Alfredo Di Napoli alfredo.dinap...@gmail.comwrote: Ok, I've added the support for urxvt. Bear in mind that it partially support urxvt, though: it works fine if you run GVim or Vim outside an already running tmux session, otherwise it won't start. The problem is due to the fact urxvt believes that the new session is launched within the running tmux session, whining about nested tmux session and not starting at all. You can unset the $TERM variable as workaround, but I don't like that apporach. If you come up with an alternative solution please let me know :) A. On 13 September 2012 16:16, Alfredo Di Napoli alfredo.dinap...@gmail.comwrote: If I remember correctly, I've also tried that combinations, without success. Anyway, I'm not at work so I can't test Cumino against gnome and Xmonad until tomorrow morning: I'll keep you posted! Bye, Alfredo I think you misunderstood; as I read it (and as I would expect it to work given the above descrtiption) that would be urxvt --hold -e sh -c 'echo a' -- brandon s allbery allber...@gmail.com wandering unix systems administrator (available) (412) 475-9364vm/sms ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] ANN: Cumino 0.3 - Now supports sandboxed environments (e.g, Hsenv ones)
Hi Cafè, I'm glat to annouce the third major improvement of my VIm plugin Cumino: https://github.com/adinapoli/cumino This one is a juicy one. If you have a sandboxed environment enabled (e.g. one created with Hsenv) and you start vim from the same shell, Cumino will automatically uses at startup the right ghci instance. This means that if you have installed only some packages in your sandbox env, you will have them available inside ghci :) Feedback are welcome, as always. A. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] [ANN] Cumino 0.2 - Now supports pretty indentation through stylish-haskell
You're welcome :) Using Cumino your workflow should be faster and leaner. I encourage to try it out and let me have feedback! Cheers, A. On 12 September 2012 21:43, Roman Cheplyaka r...@ro-che.info wrote: Ah, okay. I was just confused by the fact that it uses tmux, and thought that I was misusing it. Yes, I also usually keep ghci in a separate window (and I am an xmonad user, too). I just thought that this offers a different experience and wanted to try it out. Anyway, thanks for clarifying. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] [ANN] Cumino 0.2 - Now supports pretty indentation through stylish-haskell
Nice bridge between vim and tmux! Thanks! Would you mind add supporting for `urxvtc'? urxvtc's -e option is followed by a list of options instead of a string. urxvtc -e sh -c 'echo a' xterm -e echo a I would like to, and in fact I've already tried, but urxvt is trickier than other shells. Using the command you gave me does not create a new window, tested both on XMonad and Gnome. This is the error you can see using the option -hold, this way: urxvt --hold -e echo a This opens a new window with the error: *urxvt: Unable to exec child. * Any idea? ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] [ANN] Cumino 0.2 - Now supports pretty indentation through stylish-haskell
If I remember correctly, I've also tried that combinations, without success. Anyway, I'm not at work so I can't test Cumino against gnome and Xmonad until tomorrow morning: I'll keep you posted! Bye, Alfredo I think you misunderstood; as I read it (and as I would expect it to work given the above descrtiption) that would be urxvt --hold -e sh -c 'echo a' -- brandon s allbery allber...@gmail.com wandering unix systems administrator (available) (412) 475-9364 vm/sms ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] [ANN] Cumino 0.2 - Now supports pretty indentation through stylish-haskell
Hi everyone, in case you have missed it, I've released a Vim plugin called Cumino: http://adinapoli.github.com/cumino/ It does one simple thing: It allows communication between Vim and tmux, in particular to a ghci session. With Cumino you can fire-up Vim, load a ghci session and interact with it with only few keystrokes. The plugin also supports visual selection: you can select for example a function (even with all its signature!) and you can send it to ghci. The visual selection supports imports, custom types and typeclasses. It's a simple idea but so damn useful, imho. This release also adds the possibility to prettify the code using the excellent stylish-haskell: select a snippet, simply indent in the usual way ( = ) and voilà, now your code is indented! Feedback are highly appreciated, as well as contributions. There are still some issues with some terminals (for example urxvt does not work right now) but the plugin has been tested against gnome-terminal, xterm and mlterm. I'll post in reddit too for completeness! Bye! Alfredo ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] [ANN] Cumino 0.2 - Now supports pretty indentation through stylish-haskell
Hi, I'm not in front of the pc now, but afair the problem was related to opening a new urxvt window FROM a running urxvt. More details soon :) Sent from my iPad On 12/set/2012, at 15:18, Matvey Aksenov matvey.akse...@gmail.com wrote: Are urxvt-related issues documented somewhere? On 09/12/2012 05:03 PM, Alfredo Di Napoli wrote: There are still some issues with some terminals (for example urxvt does not work right now) ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] [ANN] Cumino 0.2 - Now supports pretty indentation through stylish-haskell
Could you please tell me what your desired behaviour would be? In praticular, do you want a ghci session in another tab or in a tmux pane perhaps? Otherwise I can't see any viable way to let vim and ghci cooperate inside the SAME window. Bye, Alfredo Sent from my iPad On 12/set/2012, at 17:05, Roman Cheplyaka r...@ro-che.info wrote: So, suppose that I'm in a terminal vim session, and I want to start ghci (in the current terminal). What do I do? localleadercc starts a new terminal, which is not what I want. On Wed, Sep 12, 2012 at 3:03 PM, Alfredo Di Napoli alfredo.dinap...@gmail.com wrote: Hi everyone, in case you have missed it, I've released a Vim plugin called Cumino: http://adinapoli.github.com/cumino/ It does one simple thing: It allows communication between Vim and tmux, in particular to a ghci session. With Cumino you can fire-up Vim, load a ghci session and interact with it with only few keystrokes. The plugin also supports visual selection: you can select for example a function (even with all its signature!) and you can send it to ghci. The visual selection supports imports, custom types and typeclasses. It's a simple idea but so damn useful, imho. This release also adds the possibility to prettify the code using the excellent stylish-haskell: select a snippet, simply indent in the usual way ( = ) and voilà, now your code is indented! Feedback are highly appreciated, as well as contributions. There are still some issues with some terminals (for example urxvt does not work right now) but the plugin has been tested against gnome-terminal, xterm and mlterm. I'll post in reddit too for completeness! Bye! Alfredo ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] [ANN] Cumino 0.2 - Now supports pretty indentation through stylish-haskell
If such a possibility exists, I would be happy to fix the urxvt support :) Bear in mind, though, that the Cumino terminal is only needed for the Ghci session, so you can use your favourite terminal to run Vim :) A. urxvt defaults to using a client-server model for all terminals, IIRC (we have a warning about it in the xmonad documentation as well since it messes up ManageHooks). There's possibly some option to disable this and force an independent terminal. -- brandon s allbery allber...@gmail.com wandering unix systems administrator (available) (412) 475-9364 vm/sms ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Help a young graduate haskeller to land its dream job
Hi everyone, If this mail sound strange to you, you are free to ignore it. My name is Alfredo Di Napoli and I'm a 24-year-old programmer from Rome, Italy. I've graduated in May and I'm currently working as an intern for a company involved in the defence field. In my spare time, though, I study functional programming, especially Haskell. FP is my true passion and I'm another dreamer trying to land the job he loves. In a nutshell I'm looking for every possibility to do Haskell/functional programming in Europe/North Europe. I'm throwing this stone into this pond because life has endless possibilities, who knows? :) A disclaimer, though: I'm not an expert Haskeller, but I'm very passionate about technology and I love learning (I've obviously already read LYAH and RWH). You can find more information about me (including my CV if interested) here: www.alfredodinapoli.com Oh! One last thing! I would be very grateful to everyone willing to spent two minutes of his time giving me any kind of suggestion about the FP job world or how to prepare/improve myself for the foreseeable future. Thanks again, and sorry for the OT/spammish plug. Humbly, Alfredo Di Napoli ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANN: LambdaCube 3D (purely functional rendering engine) is back in business
Good luck for this new beginning! A. On Sat, Sep 08, 2012 at 10:39:36AM +0200, Patai Gergely wrote: Hello all, We recently rebooted the LambdaCube project, which aims to provide a purely functional interface for GPU programming. The details and the background are described in our new blog [1], while the code can be found on GitHub [2]. Cheers, Gergely [1] http://lambdacube3d.wordpress.com/ [2] https://github.com/csabahruska/lc-dsl -- http://www.fastmail.fm - The professional email service ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANNOUCE: Haddock 2.10.0 and 2.11.0
Great news! On 7 September 2012 13:19, David Waern david.wa...@gmail.com wrote: -- Haddock 2.10.0 and 2.11.0 Two new versions of Haddock have been uploaded to Hackage: version 2.10.0 which comes with GHC 7.4.2 and 2.11.0 which comes with the new GHC 7.6.1! -- Changes in version 2.12.0 * Labeled URLs (e.g http://example.net/ some label) * Improved memory usage (new dependency: deepseq) -- Changes in version 2.11.0 * Show deprecation messages for identifiers * List identifiers declared on the same line (with a common type) separately * Don't crash on unicode strings in doc comments * Fix reporting of modules safe haskell mode * Fix a case where we were generating invalid xhtml * Improved --qual option (no crashes, proper error messages) * A new --qual option aliased which qualifies identifers by the module alias used in the source code * The Haddock API restores GHC's static flags after invocation * Access to unexported identifiers through the Haddock API again -- Links Homepage: http://www.haskell.org/haddock Hackage page: http://hackage.haskell.org/package/haddock-2.12.0 Bugtracker and wiki: http://trac.haskell.org/haddock Mailing list: hadd...@projects.haskell.org Code repository: http://darcs.haskell.org/haddock.git -- Contributors The following people contributed patches to this release: Paolo Capriotti Simon Hengel Ian Lynagh Simon Peyton Jones Iavor S. Diatchki David Terei Henning Thielemann David Waern -- Get Involved We would be very happy to get more contributors. To get involved, start by grabbing the code: http://darcs.haskell.org/haddock.git Then take a look at the bug and feature tracker for things to work on: http://trac.haskell.org/haddock ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANNOUNCE: grid-1.1
It seems cool, looking forward to play with it! On 6 September 2012 09:42, Amy de Buitléir a...@nualeargais.ie wrote: I'm happy to announce a new package called grid: http://hackage.haskell.org/package/grid https://github.com/mhwombat/grid/wiki (wiki) Grid provides tools for working with regular arrangements of tiles, such as might be used in a board game or self-organising map (SOM). Grid currently supports triangular, square, and hexagonal tiles, with various 2D and toroidal layouts. If you need a tile shape or layout that isn't currently provided, please let me know. See Math.Geometry.Grid for an example of how to use the package. Suggestions for improvement are welcome. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
