Re: [Haskell-cafe] HDBC Oracle bindings(?/!)
On Thu, Oct 30, 2008 at 11:53 AM, Daniil Elovkov [EMAIL PROTECTED] wrote: Yes, HSQL supports Oracle natively, through OCI. hsql-oracle isn't on hackage, only in the repository. That's exactly what I was looking for, but for HDBC instead. Since OCI bindings for HDBC don't seem to exist, I guess I'll have to write my own instead. I don't know how Takusen's oci code looks, but I would suspect that porting HSQL Oracle code to HDBC could be simpler, because HDBC and HSQL are quite similar in their interfaces, unlike Takusen. Thanks for the tip. I really wasn't aware that HSQL already had OCI bindings. I'll take a look at the HSQL code, steal some ideas from it and hopefully make my little HDBC driver production ready some day. Cheers, Thiago Arrais -- Enjoy Chaos - http://blog.thiagoarrais.com Thoughts, ideas and useless ranting about software development and technology ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] HDBC Oracle bindings(?/!)
John, On Thu, Oct 30, 2008 at 2:48 PM, John Goerzen [EMAIL PROTECTED] wrote: I would certainly happily reference anyone's native Oracle HDBC backend too, though! You may want to reference mine, given that there aren't any others currently. Just be aware that it really isn't ready for mass consumption yet. Cheers, Thiago Arrais -- Enjoy Chaos - http://blog.thiagoarrais.com Thoughts, ideas and useless ranting about software development and technology ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] HDBC Oracle bindings(?/!)
Are there Oracle bindings for HDBC anywhere? The HDBC project page talks about Oracle backends but there isn't an Oracle-specific driver listed (I assume one can reach an Oracle backend through the ODBC interface?). I started writing Oracle bindings for HDBC based on the Takusen code. It was done mostly for playing than for anything else and certainly isn't production ready, but it is available in a darcs repo at http://thiagoarrais.com/repos/hdbc-oracle in case anyone is interested. This code isn't ready for prime time yet and I'm looking for some that *is*. Is there such a thing already? Cheers, Thiago Arrais -- Enjoy Chaos - http://blog.thiagoarrais.com Thoughts, ideas and useless ranting about software development and technology ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: [Haskell] ANNOUNCE: Visual Haskell prerelease 0.2
On 11/30/06, Johannes Waldmann [EMAIL PROTECTED] wrote: The main advantage (Visual Haskell over eclipsefp) at the moment is that VH uses incremental (on-the-fly) typechecking/compilation while eclipsefp calls the compiler for whole modules? I would say this is one of the greatest advantages of VH, don't know if it is the main one, but it surely is an advantage. I wonder how VH achieves that. I imagine it manages to run GHC (it uses GHC, right?) inside the .Net VM or at least access it through some programmatic interface using some kind of native/VM data conversion. GHC code (and not VH code) do the typechecking/compilation tricks. Is that right? Eclipse is Java and I am pretty sure we can do something similar with it and we actually did something like the second approach prior to version 0.9.1, but just for source code parsing. What do we need for that? Cheers, Thiago Arrais -- Mergulhando no Caos - http://thiagoarrais.wordpress.com Pensamentos, idéias e devaneios sobre desenvolvimento de software e tecnologia em geral ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: Re: [Haskell-cafe] Why Exotic Languages Are Not Mainstream
Nicolas, On 8/11/06, Nicolas Frisby [EMAIL PROTECTED] wrote: Is there anything similar to VisualHaskell that works in light-weight (compared to Studio...) and multi-platform editors? There is EclipseFP: http://eclipsefp.sourceforge.net It doesn't support type inference at edition, but it is likely to be added in the future. So, I'd advise you keep an eye on it. And you can trust this is very unbiased advice, since I am the current project maintainer. :-) I don't know if Eclipse is what you'd call light weight, but it is freely available if you want to try it. At least it runs satisfactorially on my machine with 512MB of memory. Cheers, Thiago Arrais -- Mergulhando no Caos - http://thiagoarrais.blogspot.com Pensamentos, idéias e devaneios sobre desenvolvimento de software e tecnologia em geral ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Why Haskell?
Matthew, On 7/22/06, Matthew Bromberg [EMAIL PROTECTED] wrote: I'm not using an IDE does one exist? You may want to use EclipseFP for your Haskell work. It is still a work in progress, but it may be worth to give it a try. http://eclipsefp.sourceforge.net Cheers, Thiago Arrais ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Small syntax question
Mauricio, The let variant is an expression, while the where one is not. An expression is allowed to happen inside a greater expression, you just need to place the parentheres properly as you did. The where keyword does not construct a valid expression, it can only happen inside some other constructs (like module and function declarations). Cheers, Thiago Arrais ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Small syntax question
By the way, you can find the syntax specification here http://haskell.org/onlinereport/syntax-iso.html Regards, Thiago Arrais -- Mergulhando no Caos - http://thiagoarrais.blogspot.com Pensamentos, idéias e devaneios sobre desenvolvimento de software e tecnologia em geral ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: Re[2]: [Haskell-cafe] EclipseFP (Haskell IDE) 0.10.0 released
Bulat, Thanks for the suggestions (by the way, very good article on IO). Some comments below. On 7/3/06, Bulat Ziganshin [EMAIL PROTECTED] wrote: - background compilation with errors highlighting There is already some support for background compilation using GHC. Error highlighting doesn't still work as I'd like to, but is there too. - syntax highlighting, including highlighting of bracket's pair There is already some of this too, although it may not be exactly what you have in mind. - ability to fall in definition of identifier under cursor Being worked on. Should be one of the leading features on the next release, together with some more code completion. - automatic management of import lists Being worked on, together with code completion. I would like some more detail here, though. - auto-indenting with user-tuned style This one seems very challenging and interesting, not a must-have for me but a very attractive feature. I have purposely left some items behind, just because resources are limited and we need to focus on some more valuable features. Do you think the ones I selected are the most valuable ones? Would you mind to delve into some more detail on the topics above on the EclipseFP mailing list? I am particularly interested on these four (in order of priority): - ability to fall in definition of identifier under cursor - automatic management of import lists - syntax highlighting - auto-indenting with user-tuned style You can subscribe to our mailing list on http://lists.sourceforge.net/mailman/listinfo/eclipsefp-develop Are you use GHC library? Not yet, but it may turn to be a very wise decision to make in the future. EclipseFP is being written in Java, I wonder how the GHC library would be accessed on such a environment. Need to take a look at the paper. Cheers, Thiago Arrais ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] EclipseFP (Haskell IDE) 0.10.0 released
Leif, On 7/3/06, Leif Frenzel [EMAIL PROTECTED] wrote: I think the way to go is to call it via JNI. This has worked fine for me in the past on Windows with dlls Although it required quite some glue code written in C, and it did not look very pretty. Have you already taken a look at this thing here http://sourceforge.net/projects/jvm-bridge/ Seems like it will free us from writing much of the glue code. I will definetely experiment with the GHC library + JVM-Bridge, it seems very much promising. Has anyone actually tried something like that? Cheers, Thiago Arrais ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Re: EclipseFP (Haskell IDE) 0.10.0 released
Bulat, Thank you for the detailed responses. I apologize for not answering before, I was waiting for a quieter time to be able to answer properly. On 7/3/06, Bulat Ziganshin [EMAIL PROTECTED] wrote: now i'm using editor with just syntax highlighting and therefore i wrote about things those lacking are most important for me. first is the compilation. I agree with you, background compilation is the most important feature for me too. Therefore, I will try to work on this for the next release. I am looking for a Cabal-integrated build system and planning to delegate all the work (like dependency fetching and selective compilation) to the chosen build system instead of implementing it as part of EclipseFP. I think I will experiment with this approach. EclipseFP distributes live builds for every modification to the source code. Can I contact you when those builds start to be available? Would you mind trying them? after i've compiled program i don't like to find files, go to specified line just because i'm not Ceasar and can't think about files/lines and program bugs simultaneously. Not to mention that with an background compilation running frequently (at least more frequently that it would run if it was called manually), people tend to have fewer compilation errors to fix at a time. This should happen a lot on productivity (at least it helps me). why the error highlighting is a problem? GHC even supports -ferror-spans option in which emacs-style error message is printed (i.e. it includes the exact range of lines/chars what contain error) I will take a look at that. I don't actually know where our error-reporting problems come from because EclipseFP is a pretty old code base and I wasn't around when this was coded. But I do know that the current error highlighting isn't the best thing one would want. It certainly helps a lot, but it still isn't as precise as one would like. The background compilation and error highlighting issues are already enough work (and my message is getting quite long already). This doesn't mean the other issues are not valid, but we need to keep a focus here if we want to get anything done. So, I am snipping the rest of the message for the time being (and hoping those issues can be dealt with soon). Cheers, Thiago Arrais -- Mergulhando no Caos - http://thiagoarrais.blogspot.com Pensamentos, idéias e devaneios sobre desenvolvimento de software e tecnologia em geral ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] EclipseFP (Haskell IDE) 0.10.0 released
EclipseFP 0.10 has been released since last Friday. It is an open-source development environment for Haskell code. EclipseFP integrates GHC with an Haskell-aware code editor and also supports quick file browsing through an outline view, automatic building/compiling and quick one-button code execution. For this new release we have been working on code assistance support, something that has been heavily requested, and a Cabal editor. Downloads and more information are available on the project home page http://eclipsefp.sourceforge.net/ This release requires Eclipse 3.2, as opposed to Eclipse 3.1 that was required on the previous release. You may need to upgrade your Eclipse platform if you plan to use version 0.10. I have taken the liberty to create a wiki page for EclipseFP. You can post your comments and feature requests there, if you'd like. It is located at http://www.haskell.org/haskellwiki/EclipseFP Cheers, Thiago Arrais ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: Editors for Haskell
Imam, On 6/8/06, Imam Tashdid ul Alam [EMAIL PROTECTED] wrote: - about formatted error messages (I am sure you guys don't care), could someone build a light GHC front end that given a .hs/.lhs file produces two XML files with specified DTD, the parsed structure and the error messages? I would really appreciate that. I am the one maintaining EclipseFP now and I know that having the syntax-tree in XML format would help us a lot. For now, we use our own Haskell parser (written in Java). It is not a full parser (and maybe it'll never be), but it allows us to do some tricks like showing a simple code outline and do some code assistance. Maybe this isn't as much work as structuring the error messages. Cheers, Thiago Arrais ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Eclipse and Haskell
Walter, There is this tool that I am working on called EclipseFP. It is a Haskell IDE based on the Eclipse platform. We are still in alpha stage, but maybe you'd like to check it out (and help me squash some bugs :-). We can reach us at http://eclipsefp.sourceforge.net Cheers, Thiago Arrais ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Code completion? (IDE)?
Marc, On 2/16/06, Marc Weber [EMAIL PROTECTED] wrote: vim7 has introduced omni-completion... So I'm interested wether there are any projects which support any kind of completion.? I have been working on some code completion support for EclipseFP. It is right now in a really infant stage, but it at least is something. Just take a look at the latest integration build that you are able to find at http://eclipsefp.sourceforge.net/download Cheers, Thiago Arrais ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Code completion? (IDE)?
On 2/16/06, Thiago Arrais [EMAIL PROTECTED] wrote: Just take a look at the latest integration build that you are able to find at http://eclipsefp.sourceforge.net/download There is also a screenshot at http://eclipsefp.sourceforge.net/images/first-content-assist.png Cheers, Thiago Arrais ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] EclipseFP (Haskell IDE) 0.9.1 released
2006/2/1, Graham Klyne [EMAIL PROTECTED]: [I should say that I haven't yet actually tried this software, though I'd like to do so when I get some time.] I really hope you find the time to do so. We would be glad to be hearing from you again. One of the features of Haskell that I like is that it doesn't require lots of IDE support to write complex programs... the compact syntax and clean separation of concerns that can be achieved make it iasy enough to program using nothing more than a regular text editor, and no long wait for the development environment to start up. I can imagine programming Haskell on a palm-top device. Very interesting idea. One that I have thought of some time ago. I wasn't thinking of Haskell, but Ruby instead. The idea is the same, but that's another thread. Every language experiences kind of a wave. At the time it is created, there aren't many tools. The early adopters work most of the time using a compiler/interpreter and a text editor. Then the wave starts to form. This is the time the second generation of tools start to flock. They are the test frameworks, the build automation tools and others. At some point of the wave, the integrated environments appear. They come, as the name says, to integrate the previous tools in an easy to use and productive environment. Not that the previous tools were hard to use or counter-productive, it is just that by integrating them much time is saved from the details and the programmer can spend more time on the creative and useful things only he can do. So is there a compelling feature in this Eclipse plugin that isn't easily achieved using simpler tools? When we write an Eclipse plugin, we get a lot of things for free. Just to cite one, there is already CVS integration support within every Eclipse installation, which includes a very neat diff viewer. Adding support for other version control systems isn't very hard. There are plugins, for example, for Darcs and Subversion too. Another very nice feature of the Eclipse platform is the refactoring support. Wouldn't you like to refactor your Haskell code as easily as selecting some context-menu item? Not to mention code assistance and 'go to declaration support' (click a module/function/whatever reference and open its corresponding declaration). This has saved me a lot of time when browsing code. Of course, you need to write the code to tell the platform about your language. That's what the EclipseFP team is trying to do. There is one issue, though, that touches a lot of sensitive areas. The Eclipse platform runs inside a Java Virtual Machine. Unfortunately, there isn't currently a way to compile Haskell to the JVM (at least I don't know of any, if someone knows, please let me know). This means the IDE has to be written in Java, not in Haskell. That's the price we are paying now. Writing a tool for a language in a different language. 2006/2/1, Duncan Coutts [EMAIL PROTECTED]: Fortunately using an IDE is optional. And should always be. An IDE should never be the only way to build things in any language. And the existing IDEs should always be backward compatible with the previous tools. They should not, for example, generate unreadable code or use any vendor-specific format. Cheers, Thiago Arrais ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] EclipseFP (Haskell IDE) 0.9.1 released
EclipseFP 0.9.1 has been released since last Friday. It is an open-source development environment for Haskell code. EclipseFP integrates GHC with an Haskell-aware code editor and also supports quick file browsing through an outline view, automatic building/compiling and quick one-button code execution. Downloads and more information are available on the project home page http://eclipsefp.sourceforge.net/ We are open for comments and general discussion. Actually we would really appreciate comments from both newbie and veteran Haskell programmers. This is open-source development and everyone on the Haskell community is welcome to participate. Cheers, Thiago Arrais ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
