Re: [Haskell-cafe] Re: How many "Haskell Engineer I/II/III"s are there?
I am working on an analytics server with a web front end. Being a personal endeavor at this time, I can choose any language that I fancy. I love Haskell and have achieved a modicum of proficiency with many years of following along. I spent a few weeks of serious Haskell prototyping and came to the realization that Haskell has a very steep learning curve to become truly proficient in it. The basics are easy, the various typeclasses can be understood with some study. But, there are thousands of packages on Hackage and not much documentation on most them. Another issue for me is the lack of a cohesive infrastructure for working with web services. Now my work has shifted to Clojure. I like it so far but I miss the elegance of Haskell. Whether Haskell becomes an easy choice for commercial work or remains a boutique language depends on how easy it is to build today's applications. But, I still love Haskell :) Praki On Thu, Feb 11, 2010 at 1:39 AM, Michael Oswald wrote: > On 02/10/2010 04:59 PM, Jason Dusek wrote: >> I wonder how many people actually write Haskell, >> principally or exclusively, at work? > > Well, my main language at work in the moment is C++, we also use Java, a > lot of Tcl and Python. > > I use Haskell for my own programs and test utilities / converters. The > biggest achievement at work was an Installer program, which was quite > complicated and had to be safe and of course we had time pressure, so I > quickly coded it in Haskell. It is now used in the installation > procedure of a part from a big mission control system for satellites. > > > lg, > Michael > > ___ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > -- http://www.google.com/profiles/praki.prakash ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Need some ideas to map XML Schema types to Haskell types
Hi, I need to work with a web service that has a few thousand types in its schema. I am trying to automate the generation of data types and serializers from the schema. My first thought was to map each data type to a Haskell record and generate pickle methods thereafter for serialziation/deserialization. However, I am seeing a few challenges in mapping Schema types to Haskell records. First issue is the naming conflicts with record fields. If the number of types were smaller, I could have manually mangled the name with a unique prefix. Using a type class for shared name fields seems like an option but it looks like quite a bit of work. Is there any other technique I can use? Second issue is with capturing the Schema type hierarchy. Is there any way to relate types? If not, what would be a good technique to represent type hierarchies? Thanks, Praki ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Takusen 0.8.3 install problems
Don, Thanks for the hint. I removed Setup.hs and tried "cabal build". I get an error that build type is custom and Setup.lhs is missing. What is the magical incantation needed to do the default build? Thanks Praki On Sat, Jan 31, 2009 at 12:30 PM, Don Stewart wrote: > praki.prakash: >> I am trying to install Takusen 0.8.3 with ghc 6.10.1 on Ubuntu 8.04 >> (same issue on Win XP as well). I get the following complaint from >> cabal. >> >>Module >>`Distribution.PackageDescription' >>does not export >>`writeHookedBuildInfo' >> cabal: Error: some packages failed to install: >> Takusen-0.8.3 failed during the configure step. The exception was: >> exit: ExitFailure 1 > > You can probably just remove the Setup.lhs and build with defaults > (we're doing that at galois, we use Takusen). > > -- Don > ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Takusen 0.8.3 install problems
I am trying to install Takusen 0.8.3 with ghc 6.10.1 on Ubuntu 8.04 (same issue on Win XP as well). I get the following complaint from cabal. Module `Distribution.PackageDescription' does not export `writeHookedBuildInfo' cabal: Error: some packages failed to install: Takusen-0.8.3 failed during the configure step. The exception was: exit: ExitFailure 1 Any suggestions on how to fix this issue? Thanks, Praki ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Unboxing VT_VARIANT in hscom
I am a Haskell newbie trying to do COM automation using Haskell. I am using hscom (Krasimir's implementation of COM automation). I have run into a problem and need some help. I have a Variant returned from a COM method invocation. When I print it, it shows up as below. Variant VT_DISPATCH I need to invoke methods on the wrapped interface. My attempt to unbox it as below runs into 'rigid type' error. someFunc (Variant VT_DISPATCH val) query = do dispId <- getMethodID "MethodName" val The code above generates this error. Couldn't match expected type `IDispatch a' against inferred type `a1' `a1' is a rigid type variable bound by... I am probably missing something pretty basic. Any help on this is greatly appreciated! Thanks ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
