Re: [Haskell-cafe] hdbc-mysql fails to compile

bosity mysqlConfigProgram (withPrograms lbi) obviously the new cabal version makes a difference between "requireProgram" and "requireProgramVersion" On Thu, Feb 25, 2010 at 08:01:34PM +0100, Thomas Girod wrote: > Hi there. Looks like hdbc-mysql cannot compile against GHC-6.12 -- > con

[Haskell-cafe] hdbc-mysql fails to compile

Hi there. Looks like hdbc-mysql cannot compile against GHC-6.12 -- confirmed by the hackage build logs. [1] anyone know a way to dodge the problem ? cheers, Tom [1] http://hackage.haskell.org/packages/archive/HDBC-mysql/0.6/logs/failure/ghc-6.12 ___

Re: [Haskell-cafe] Seen on reddit: or, foldl and foldr considered slightly harmful

Isn't it the kind of things Data Parallel Haskell is achieving ? I'm in no way an expert of the field, but from what I've read on the subject it looked like : I have a list of N elements and I want to map the function F on it. technically, I could spawn N processes and build the result from that,

Re: [Haskell-cafe] various dependencies breakages

thanks Lars and Max. It did the trick, except for one small detail : MissingH needs the "testpack -any" dependency, but cabal does not install it automatically. tom ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/

[Haskell-cafe] various dependencies breakages

Hi there. I'm trying to reinstall gitit after updating to ghc 6.12 and it's driving me crazy. I hope you will be able to help me troubleshoot this mess ... I'm starting from scratch again, using cabal. I will post more problems as they appears. $ cabal install gitit Resolving dependencies... cab

[Haskell-cafe] sound synthesis

Hi there. Following this advice (http://reddit.com/info/6hknz/comments/c03vdc7), I'm posting here. Recently, I read a few articles about Haskell (and FP in general) and music/sound. I remember an article ranting about how lazy evaluation would be great to do signal processing, but it was la

[Haskell-cafe] representing differencial equations in haskell

Hi there. Let's say I have mathematical model composed of several differential equations, such as : di/dt = cos(i) dc/dt = alpha * (i(t) - c(t)) (sorry my maths are really bad, but I hope you get the point) I would like to approximate the evolution of such a system iteratively. How would you do

[Haskell-cafe] transparent parallelization

ff open doors (I guess this doesn't mean anything in english but it sounds cool) ... Regards Thomas Girod ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

[Haskell-cafe] nested datatypes

Hi there. recently I was trying to represent complex data by defining several datatypes and nesting them, such as data Foo = Foo { foo :: Bar } deriving (Eq,Show) data Bar = Bar { bar :: Int } deriving (Eq,Show) To change only a part of the data, syntactic sugar is quite convenient. But

[Haskell-cafe] newbie : multi-parameter type classes

Hi there. I'm trying to define a generic graph type here and don't understand on one error I get. Here I come. module Graph where class (Eq n, Eq e) => Topo a n e where empty:: a nodes:: a -> [n] edges:: a -> [e] data Node n = Node n deriving (Eq,Show) data Edg