Re: [Haskell-cafe] hsql-mysql encoding issues
Hi, what DB binding should I rather be using? mongoDB [1] works well (also for data with umlauts) for my feed aggregator [2]. Best regards, Alex [1] http://hackage.haskell.org/package/mongoDB [2] http://hackage.haskell.org/package/lucienne signature.asc Description: OpenPGP digital signature ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] ANN: lucienne-0.0.1
Hi, some time ago I wrote lucienne[1] using the happstack framework: Lucienne is a simple server side feed aggregator/reader that helps you managing your subscribed feeds. It provides multi user support using basic access authentication. A running mongoDB serves as database backend. For more information, check [1] and [2]. Best regards, Alex [1] http://hackage.haskell.org/package/lucienne [2] http://www.imn.htwk-leipzig.de/~abau/lucienne ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Type classes in Typing Haskell in Haskell
Hi, recently I tried the Typing Haskell in Haskell library. But I was wondering why this program type checks: -- plusMfun is standard '+': Num a = a - a - a test = let Just classEnv = ( addCoreClasses : addNumClasses ) initialEnv e = Ap ( Ap (Var +) (Lit $ LitStr 3)) (Lit $ LitStr 5) impl = (foo,[([],e)]) in putStrLn $ pretty $ runTI $ tiImpls classEnv [plusMfun] [impl] I was expecting some kind of typechecking error, because [Char] is no instance of Num. But I get this: ([isIn1 cNum (TAp tList tChar)], [foo :: Forall [] ([] := (TAp tList tChar))]) The predicate says that if [Char] would be in Num then the type of the expression would be [Char]. But actually [Char] isn't in Num. So, how do I provoke a type check error in this case? Thanks in advance. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Unknown symbol `__dso_handle' with Template Haskell and wxHaskell
GHCi and cabal didn't work, but ghc --make did. Neither GHCi, cabal nor ghc --make works. I refactored my code, so that all TH related stuff does not depend on wxHaskell, i.e. wxHaskell doesn't need to be loaded during THs code generation. Then ghc --make works fine. But when using cabal, the same error occurs. It seems to me that TH (when used with cabal) loads all packages specified at Build-Depends in your cabal file (whether they are needed or not). ghc --make instead just loads all packages, that are really needed for THs code generation. But this is just a workaround and does not explain why TH does not work with wxHaskell. I think this is somehow related to the inability to use wxHaskell inside of GHCi [1], because then the same error occurs. [1] http://comments.gmane.org/ gmane.comp.lang.haskell.wxhaskell.general/923 ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Unknown symbol `__dso_handle' with Template Haskell and wxHaskell
Hi,
I am using Template Haskell and wxHaskell [1]. When Graphics.UI.WX is
loaded during THs code generation, I get the following error:
...
Loading package wxdirect-0.12.1.3 ... linking ... done.
ghc: /usr/local/lib/wxcore-0.12.1.6/ghc-6.12.3/HSwxcore-0.12.1.6.o:
unknown symbol `__dso_handle'
Loading package wxcore-0.12.1.6 ...
linking ... ghc: unable to load package `wxcore-0.12.1.6'
System stats:
ghc-6.12.3
template-haskell-2.4.0.1
wx-0.12.1.6
Regards,
Alex
[1] Example:
-- Test.hs --
{-# LANGUAGE TemplateHaskell #-}
module Test2 where
import Language.Haskell.TH
import qualified Graphics.UI.WX as WX
foo :: Q [Dec]
foo = do
info - reify ''WX.Color
runIO $ print info
return []
-- Main.hs --
{-# LANGUAGE TemplateHaskell #-}
module Main where
import Test
$(foo)
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[Haskell-cafe] Announce: lhae-0.0.3
lhae[1] is a spreadsheet program. It features a simple formula language and some basic statistical methods, like descriptive statistics and pivot tables. 0.0.2 - 0.0.3: --- Improvements: - Right click menu at columns/row headers and cells - Insert rows/columns between exisiting rows/columns - Boolean values - New functions: ==,/=,,=,,=,not - If-then-else expressions - New constants: true,false,pi - Filtering of columns/rows - Relative references - Copy formulas into multiple cells Fixed bugs: - Import from csv files - Table updates when deleting/inserting rows/columns - When closing tables: no more Want to save? queries on already saved tables [1] http://hackage.haskell.org/package/lhae ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Haskell Users in Leipzig
Perhaps you can ask on the Ocaml mailing list too. Done. I know Standard ML, never wrote any big software in it due to the lack of libraries. Yes, same problem here. Alex ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Haskell Users in Leipzig
Hi, On 12/24/2009 04:25 PM, Matthias-Christian Ott wrote: I just wanted to know whether there are any Haskell users and enthusiasts in the Leipzig area who are interested in meeting with other users yes I'm interested. Users of other functional programming languages are of course also welcome. Nice, because I would like to meet some local Ocaml users as well. Alex ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
