Re: [Haskell-cafe] Announce: Leksah 0.13.1 (a bit experimental)

2013-01-09 Thread Peter Simons
Hi Hamish, Features in process-leksah have been merged into process. For newer versions of GHC leksah-server just depends on process. I trust this applies to the unreleased beta version that you just announced, right? (The latest release versions still seem to depend on process-leksah.) In

Re: [Haskell-cafe] Example programs with ample use of deepseq?

2013-01-09 Thread Erik Hesselink
On Tue, Jan 8, 2013 at 10:54 PM, Joachim Breitner m...@joachim-breitner.de wrote: Am Dienstag, den 08.01.2013, 13:01 -0800 schrieb Evan Laforge: surprisingly, deepseq is not used as much as I thought. http://packdeps.haskellers.com/reverse/deepseq lists a lot of packages, but (after

Re: [Haskell-cafe] Example programs with ample use of deepseq?

2013-01-09 Thread Joachim Breitner
Hi Erik, Am Mittwoch, den 09.01.2013, 14:23 +0100 schrieb Erik Hesselink: We've also used this approach to debug space-leaks, and would have loved such a tool. We used deepseq, and compared the heap profiles. We finally found the leaks this way, and fixed them using strictness annotations.

[Haskell-cafe] HaskellDB-HDBC-PostgreSQL installation problem

2013-01-09 Thread Johannes . Reiher
Hello Community, I have a problem installing the HaskellDB-HDBC-PostgreSQL package with cabal. I'm using Haskell Platform in Windows and I tried to install this package, but there was the error could not find pq library. So I tried to install libpq wich includes pq but there was another error:

Re: [Haskell-cafe] HaskellDB-HDBC-PostgreSQL installation problem

2013-01-09 Thread Christopher Done
Tricky. For what it's worth, if you can't figure this out in the end, you could perhaps use my pgsql-simple which is implemented in pure haskell: https://github.com/chrisdone/pgsql-simple It's been in use on hpaste.org for about 2 years. On 9 January 2013 14:44, Johannes.Reiher

Re: [Haskell-cafe] Example programs with ample use of deepseq?

2013-01-09 Thread Erik Hesselink
On Wed, Jan 9, 2013 at 2:40 PM, Joachim Breitner m...@joachim-breitner.de wrote: Hi Erik, Am Mittwoch, den 09.01.2013, 14:23 +0100 schrieb Erik Hesselink: We've also used this approach to debug space-leaks, and would have loved such a tool. We used deepseq, and compared the heap profiles. We

Re: [Haskell-cafe] HaskellDB-HDBC-PostgreSQL installation problem

2013-01-09 Thread Alexander Alexeev
Try Persistent package. It doesn't depends on libpq and has many useful features (see http://www.yesodweb.com/book/persistent for details) On 01/09/2013 05:50 PM, Christopher Done wrote: Tricky. For what it's worth, if you can't figure this out in the end, you could perhaps use my pgsql-simple

Re: [Haskell-cafe] Seeking feedback for a tutorial paper draft about GADTs

2013-01-09 Thread Alexander Batischev
On Tue, Jan 08, 2013 at 11:22:39PM +0400, Anton Dergunov wrote: I have written a draft of an introductory-level tutorial paper about GADTs in Haskell (for submittion to proceedings of the recent LASER summer school) and I would like to seek initial feedback about its content: what information

Re: [Haskell-cafe] HaskellDB-HDBC-PostgreSQL installation problem

2013-01-09 Thread Felipe Almeida Lessa
AFAIK, persistent's PostgreSQL support does depend on libpq via postgresql-libpq. On Wed, Jan 9, 2013 at 12:39 PM, Alexander Alexeev m...@eax.me wrote: Try Persistent package. It doesn't depends on libpq and has many useful features (see http://www.yesodweb.com/book/persistent for details)

[Haskell-cafe] Is http://hackage.haskell.org/packages/hackage.html having a challenging serving up archive.tar?

2013-01-09 Thread KC
:) -- -- Regards, KC ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Re: [Haskell-cafe] Undo records

2013-01-09 Thread Ben Doyle
I think acid-state (http://hackage.haskell.org/package/acid-state) might do what you want, at least in broad strokes. It uses a durable transaction log to store query and update events. As far as I know, the interface to the library doesn't expose an undo/rollback function, so you'd have a bit of

Re: [Haskell-cafe] Undo records

2013-01-09 Thread Casey Basichis
Hi Ben, Thanks for the reply. I am planning on using Persistent which can work without template haskell, though I am planning on using the TH on my workstation to create the boiler code parts of the database setup. The part that I'm having trouble with is collecting the composed functions. It

Re: [Haskell-cafe] Example programs with ample use of deepseq?

2013-01-09 Thread Joachim Breitner
Hi, Am Mittwoch, den 09.01.2013, 15:11 +0100 schrieb Erik Hesselink: We finally solved the problems by completely moving to strict map operations, strict MVar/TVar operations, and strict data types. do you mean strict by policy (i.e. before storing something in a [MT]Var, you ensure it is

Re: [Haskell-cafe] HaskellDB-HDBC-PostgreSQL installation problem

2013-01-09 Thread erik flister
there was another error: this package needs a unix installation. you need to use MinGW, but it still fails because of a GHC bug http://hackage.haskell.org/trac/ghc/ticket/7103 https://github.com/lpsmith/postgresql-libpq/issues/7 -e ___ Haskell-Cafe

[Haskell-cafe] haskell.cs.yale.edu error

2013-01-09 Thread Greg Fitzgerald
I was hoping to check on the status of Yampa, but: http://haskell.cs.yale.edu/ [an error occurred while processing this directive] You don't have permission to access the requested directory. There is either no index document or the directory is read-protected. [an error occurred while

[Haskell-cafe] Haskell Weekly News: Issue 254

2013-01-09 Thread Daniel Santa Cruz
Welcome to issue 254 of the HWN, an issue covering crowd-sourced bits of information about Haskell from around the web. This issue covers the week of December 02, 2012 to January 05, 2013. As some of you might have noticed, there has been an interruption in the scheduled transmission of the