Re: Having difficulties with compilation in slime, emacs and clojure-project
Rob Lachlan napisał(a): Thanks for the help. I had initially installed slime, clojure-mode and swank following the instructions at http://riddell.us/tutorial/slime_swank/slime_swank.html I tried simply installing swank-clojure, but that seemed to conflict with what I already had. So I removed everything -- slime, clojure- mode, etc. and installed swank-clojure using ELPA. This in turn installed slime, slime-repl, swank-clojure, and clojure- mode. But now when I try M-x slime, I get: Searching for program: no such file or directory, lisp Clearly, my emacs-fu is not strong enough. Any ideas? First of all make sure that ELPA package.el is loaded before (require 'slime). It is important for correct initialization of load-path list. Then check the content of load-path (type load-path in *scratch* buffer and press C-j). There should be in this list directories with clojure-mode, slime, slime-repl, swank-clojure installed using ELPA. Check swank-clojure-classpath (there should be clojure.jar, clojure- contrib.jar and swank-clojure.jar on this path) and swank-clojure-java-path (there should be java executable, which can be found on system PATH). HTH, Rob -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Recommended JVM flags for Clojure
Hello fellow Clojurians, I got lots of java.lang.OutOfMemoryError: GC overhead limit exceeded exceptions ,and after a short investigation added the following flags (JVM 1.6.0_17): -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX: +CMSIncrementalPacing These flags seems to solve the problem, but I am interested in your experience and best practices regarding JVM flags in clojure. I know it really depends on the type of the application, but it seems to me that the gc is working really hard under Clojure (I cannot prove it, this is just an impression) Gabi -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Understanding the continuation monad's bind operator
On 07.01.2010, at 01:56, Steven E. Harris wrote: I'm interested in what you mean by composite computation, because I think it's hinting at some concept for monads that I missed. If, as you say, executing the function immediately is not acceptable behavior, then I infer that the goal is to delay evaluation of the monadic function 'f' until someone finally passes in a real continuation as, say, by the `run-cont' function. Is that right? Right. Consider the following simple example: (domonad cont-m [x (m-result 1) y (m-result 2)] (+ x y)) Its result is a function that, when called with a continuation argument, calls the continuation with the argument 3. This implies that nothing at all is executed when the monadic composition happens. All real execution is delayed until the composite function is called. If so, is it the case with all or most monads that the bind operator is not meant to actually perform computation on the spot, but rather to compose a delayed computation, or is this delaying particular to the continuation monad? No. The state and continuation monads behave like that, but the sequence and maybe monads do not. This is not as arbitrary as it may seem to be, as there is a simple rule: When the monadic values are functions representing computations, monadic composition yields a new function but doesn't execute anything. When the monadic values represent results of computations, then monadic composition implies execution of the computational steps. Konrad. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Understanding the continuation monad's bind operator
On 07.01.2010, at 02:23, Steven E. Harris wrote: That means that a monadic function has a signature like a - m b RIght. Say that we're looking to use some normal functions with this monad. Those functions may have signatures like a - b They clearly don't return the right kind of value. There must be some way to integrate such functions without writing new wrappers around them by hand. Is this a job for `m-fmap'? There are various ways to construct monadic values. m-fmap is one of them, but it already requires a monadic value as input. The simplest way to construct a monadic value is m-result. Reading the implementation, it looks like it would take a normal function and allow it to call on the basic value extracted from a monadic value. Indeed. One way to define m-fmap is (defn m-fmap [f mv] (domonad [x mv] (f x))) But note that the second value is already a monadic value. The lift operator also sounded relevant, but, if I understand it correctly, it converts a normal function to one that accepts a monadic value and returns a monadic value. Right. For a function of a single argument, m-lift and m-fmap are equivalent. That's the wrong argument type to be used with bind -- which wants to call on a monadic function with a basic value -- so I don't understand when one would want to use lift. When would one be able to call on a lifted function? A simple example would help. Here is an example taken from clojure.contrib.monads.examples. The function pairs take a sequence of values and produces a sequences of all pairs of items in the input sequence: (with-monad sequence-m (defn pairs [xs] ((m-lift 2 #(list %1 %2)) xs xs))) Konrad. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: [ANN] clj-peg v0.6 released
On Jan 5, 2010, at 5:59 PM, Richard Lyman wrote: For now I'd rather be compensated if someone were planning on using clj-peg commercially. I'm not sure how much I'd charge for a commercial-friendly license, and I don't have an automated process for handling billing and production of a differently licensed product, so I'm reluctant to move that direction for now. If you were interested in licensing clj-peg under different terms I'm willing to discuss it outside of this mailing list. Did that answer your question? Yes, thanks. Best, Stefan -Rich On Tue, Jan 5, 2010 at 8:17 AM, Stefan Tilkov stefan.til...@innoq.com wrote: Richard, can you elaborate on the license? The license page says Permission is granted to use and redistribute this software except for commercial use […] Stefan -- Stefan Tilkov, http://www.innoq.com/blog/st/ -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Newbie question on XML processing
Hello I have a simple task of reading an XML structure, manipulate part of it and writing it back to XML. For example, adding 1$ for each book with a year element after 2005 in the following example: ?xml version=1.0 encoding=UTF-8? bookstore book category=COOKING title lang=enEveryday Italian/title authorGiada De Laurentiis/author year2005/year price30.00/price /book book category=CHILDREN title lang=enHarry Potter/title authorJ K. Rowling/author year2006/year price29.99/price /book /bookstore clojure.contrib.zip-filter.xml is getting me close to this, but I still do not see how can I use it (or other library) to modify values. What would be the idiomatic (and easiest) way to do that? I apologize in advance if this is too trivial. Thanks Tzach -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Recommended JVM flags for Clojure
First, make sure you have -server. If you can spare more heap, use - Xmx1g . If you're on a 64bit jvm, -XX:+UseCompressedOops adds a significant boost. A flag that helps quite a bit is -XX: +DoEscapeAnalysis . Finally, if you want to play around with the JIT threshold, use -XX:CompileThreshold=n , where n defaults to 1. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Having difficulties with compilation in slime, emacs and clojure-project
Rob Lachlan robertlach...@gmail.com writes: Thanks for the help. I had initially installed slime, clojure-mode and swank following the instructions at http://riddell.us/tutorial/slime_swank/slime_swank.html I tried simply installing swank-clojure, but that seemed to conflict with what I already had. So I removed everything -- slime, clojure- mode, etc. and installed swank-clojure using ELPA. This in turn installed slime, slime-repl, swank-clojure, and clojure- mode. But now when I try M-x slime, I get: Searching for program: no such file or directory, lisp Sounds like you didn't quite remove everything from your old setup. There must still be some old slime code/configuration lying around somewhere. -Phil -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: SLIME/Swank problem with swank.util.sys/get-pid and RuntimeMXBean
Steven E. Harris s...@panix.com writes: Here's the stack: o swank-clojure Git head. o SLIME Both CVS head and git://git.boinkor.net/slime.git head behave the same way, as the offending calls are in swank-clojure. Could you try installing SLIME via ELPA as recommended in the swank-clojure readme? CVS head is known to have introduced incompatibilities with Clojure. -Phil -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Recommended JVM flags for Clojure
I use -XX:+UseConcMarkSweepGC. And don't forget -Xmx, just having a bigger heap can solve some problems. Some people have found it necessary to increase the PermGen size, but usually only for programs that generate a lot of functions dynamically. -SS On Jan 7, 4:20 am, Gabi bugspy...@gmail.com wrote: Hello fellow Clojurians, I got lots of java.lang.OutOfMemoryError: GC overhead limit exceeded exceptions ,and after a short investigation added the following flags (JVM 1.6.0_17): -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX: +CMSIncrementalPacing These flags seems to solve the problem, but I am interested in your experience and best practices regarding JVM flags in clojure. I know it really depends on the type of the application, but it seems to me that the gc is working really hard under Clojure (I cannot prove it, this is just an impression) Gabi -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
clojure-contrib 1.1.0 Release Candidate 2
We have a second Release Candidate for clojure-contrib version 1.1. This avoids ticket #42, AOT compilation of clojure-contrib.jar pre-sets logging implementation, by not AOT-compiling logging.clj. -SS -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: ANN: 6pm Sat, Jan 9th: Wraith Scheme, Paralell Distributed Clojure at the Hacker Dojo
Whoops, yes, I meant Jan 9, thanks On Jan 6, 8:02 pm, ajay gopalakrishnan ajgop...@gmail.com wrote: It's Jan 9 I guess On Wed, Jan 6, 2010 at 10:53 PM, nallen05 nalle...@gmail.com wrote: Two very cool presentations this Saturday at the Hacker Dojo in Mountain View: 1. An introduction to Wraith Scheme by Jay Reynolds Freeman 2. An introduction to parallel and distributed programming with Clojure by Amit Rathore Go here for more info:http://www.meetup.com/balisp/calendar/12248048/ Hope to see you there! Nick -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.comclojure%2bunsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en- Hide quoted text - - Show quoted text - -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Recommended JVM flags for Clojure
Thanks I'll try those flags. I indeed use 64 bits On Jan 7, 6:47 pm, kyle smith the1physic...@gmail.com wrote: First, make sure you have -server. If you can spare more heap, use - Xmx1g . If you're on a 64bit jvm, -XX:+UseCompressedOops adds a significant boost. A flag that helps quite a bit is -XX: +DoEscapeAnalysis . Finally, if you want to play around with the JIT threshold, use -XX:CompileThreshold=n , where n defaults to 1. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Recommended JVM flags for Clojure
What I use: -Xincgc : enable incremental garbage collector. Works great when there's more than 1 CPU -Xms4000m -Xmx4000m : set both min and max heap size to the same amount (4 Gb in this case). Prevents dynamic heap resizing, which at high loads may result in unexpected out of memory errors and long pauses. Albert -- http://albert.rierol.net -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
ClojureCLR + Silverlight
Hi All, Does anyone know if ClojureCLR runs or could run on the Silverlight CLR? Can one use ClojureCLR to build Silverlight applications? I am as new as one can be to the .NET/CLR world, but the combination seems promising for an application I am planning to work on. Garth -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Having difficulties with compilation in slime, emacs and clojure-project
Thanks Phil and Rob for your help. I got rid of everything in emacs.d, and tried reinstalling from the beginning. For some reason, elpa seems to get stuck halfway through with this message: trying to parse HTTP response code in odd buffer: *http tromey.com:80* But having installed swank-clojure, I get an error: java.lang.ClassNotFoundException: swank.swank And I can't find swank-clojure.jar anywhere on my system. Should I have built that separately? Anyway, thanks very much for all your help. Rob On Jan 7, 9:05 am, Phil Hagelberg p...@hagelb.org wrote: Rob Lachlan robertlach...@gmail.com writes: Thanks for the help. I had initially installed slime, clojure-mode and swank following the instructions athttp://riddell.us/tutorial/slime_swank/slime_swank.html I tried simply installing swank-clojure, but that seemed to conflict with what I already had. So I removed everything -- slime, clojure- mode, etc. and installed swank-clojure using ELPA. This in turn installed slime, slime-repl, swank-clojure, and clojure- mode. But now when I try M-x slime, I get: Searching for program: no such file or directory, lisp Sounds like you didn't quite remove everything from your old setup. There must still be some old slime code/configuration lying around somewhere. -Phil -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: SLIME/Swank problem with swank.util.sys/get-pid and RuntimeMXBean
Phil Hagelberg p...@hagelb.org writes: Could you try installing SLIME via ELPA as recommended in the swank-clojure readme? That will be a project I'll have to defer until the weekend, as I've never used ELPA. I use the CVS SLIME almost daily for Common Lisp work, so I'm reluctant to give it up. Also, it's not a tenable situation to fork SLIME for Clojure support. CVS head is known to have introduced incompatibilities with Clojure. Is the git repository at git://git.boinkor.net/slime.git just tracking the CVS repository, or is that the same as the ELPA-hosted one? I did try all of this with the git version and found the exact same behavior as with the CVS version. -- Steven E. Harris -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Understanding the continuation monad's bind operator
Thank you, Konrad. Your explanation was perfect. -- Steven E. Harris -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Understanding the continuation monad's bind operator
Konrad Hinsen konrad.hin...@fastmail.net writes: When the monadic values are functions representing computations, monadic composition yields a new function but doesn't execute anything. When the monadic values represent results of computations, then monadic composition implies execution of the computational steps. Can you recommend a book that covers aspects of monads like these? I'd like to learn more about the abstract concepts than their implementation in a particular language. -- Steven E. Harris -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: SLIME/Swank problem with swank.util.sys/get-pid and RuntimeMXBean
Steven E. Harris s...@panix.com writes: Could you try installing SLIME via ELPA as recommended in the swank-clojure readme? That will be a project I'll have to defer until the weekend, as I've never used ELPA. I use the CVS SLIME almost daily for Common Lisp work, so I'm reluctant to give it up. Also, it's not a tenable situation to fork SLIME for Clojure support. If someone would volunteer to fix it, I'd be thrilled. Nobody who is interested in using CL and Clojure at the same time has stepped forward so far, which is why it's currently broken. CVS head is known to have introduced incompatibilities with Clojure. Is the git repository at git://git.boinkor.net/slime.git just tracking the CVS repository, or is that the same as the ELPA-hosted one? I did try all of this with the git version and found the exact same behavior as with the CVS version. Yes, that git repo is just a mirror of CVS. -Phil -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Having difficulties with compilation in slime, emacs and clojure-project
Rob Lachlan robertlach...@gmail.com writes: But having installed swank-clojure, I get an error: java.lang.ClassNotFoundException: swank.swank And I can't find swank-clojure.jar anywhere on my system. Should I have built that separately? Anyway, thanks very much for all your help. How did you launch it? If you use M-x swank-clojure-project, you'll need to use a dependency management system to place swank-clojure.jar in lib/, as it says in the readme. -Phil -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: gui repl
This is very interesting, but I cannot seem to get Clojure code to execute in
it. I have it installed and field thinks it is installed. Do I need to somehow
switch modes?
---
Joseph Smith
j...@uwcreations.com
On Jan 4, 2010, at 3:42 PM, Marc Downie wrote:
Well, if people are in the mood for fun, hybrid, Clojure REPLs...
The latest version of Field (a mac-only open source IDE for digital art)
secretly supports Clojure as one of its embedded languages (screenshot here,
more information about Field here). This means you can write:
# these lines are Python (strictly, Jython)
xxx =15
vv = Vector3(1.2,0,1) # Vector3 is actually Java Class
// start-clojure
(defn asum [#^floats xs]
(areduce xs i ret (float 0)
(+ ret (aget xs i
(println (asum (float-array [xxx (.x vv) 3])))
// end-closure
# back to Python, in beta 11
_clojure.asum(array('f', [1,2,3]))
---
Installation instructions upon request: it's just an undocumented hack right
now, but it's a working hack. You can use it to write code against the
Field's OpenGL graphics system or Processing libraries. If anybody is excited
(rather than repulsed or outraged) by this we could use some Clojure hacking
talent to make it real.
best,
Marc.
On Mon, Jan 4, 2010 at 2:17 PM, Brian Goslinga quickbasicg...@gmail.com
wrote:
Nice. This reminds me of some of the things you can do in CLIM.
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Re: Recommended JVM flags for Clojure
Hi Gabi, This may not be useful, but have you tried running the Clojure new branch? Rich implemented fine-grained locals clearing on the new branch, and it helps avoid holding onto unused data accidentally. http://groups.google.com/group/clojure/browse_thread/thread/14baed8f26097515/583cd8375a0d446d Seth -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
[ANN] CfP: IEEE Software Special Issue: Multiparadigm Programming
Apologies for repeat emails… Note the 1 Feb. deadline!CfP: IEEE Software Special Issue: Multiparadigm Programming *Final submissions due: 1 February 2010 Publication date: September/October 2010* For most of today’s applications, using one language and one paradigm—for instance, object-oriented programming—is inadequate. Today’s applications are often polyglot, involving multiple languages, and multiparadigm, involving a mixture of deployment directives as well as functional, relational, object-oriented, aspect-oriented, and other paradigms. *IEEE Software* is soliciting articles for a special issue on multiparadigm programming, or MPP. It will explore MPP technologies, advantages, disadvantages, and applications ranging from embedded and IT systems to the Internet. Scope Articles addressing any area of MPP are within this special issue’s scope. These topics are particularly welcome: - A review of *programming technologies* that support a MPP approach to system development. This could include discussions of how modern languages such as Ruby, Scala, F#, Oslo, etc. mix and match MPP features. Also of interest would be approaches for applying MPP in more established languages such as Java and C++. - *Platforms, tools, and IDEs* designed to support MPP—for example, the role of the Java VM and the .NET CLR as integration platforms for code written in multiple languages. We would like to include an analysis of the rise of integration, configuration, and deployment technologies that have become ubiquitous in MPP applications on Web frameworks, IDEs such as Eclipse, etc. - Analysis of the *advantages, disadvantages, and challenges* of MPP in the software development life cycle—e.g., tooling, code complexity and succinctness, developer proficiency and productivity, quality, and long-term maintenance. Guidelines for MPP with evidence of best practices and requirements for tooling would be useful. - *Examples of hybrid technologies and applications* that mix paradigms and/or languages—for example, articles showing how subsets of technologies (e.g., Web content, relational and nonrelational databases, client-server, domain-specific languages (DSLs), metaprogramming, modeling, assembler-level coding, hardware, GUI building, XML processing, code generation, and component assembly) can be mixed. - Review of the current *MPP technology landscape*: what languages and platforms support MPP, what features do they offer, what are they suitable for, and what limitations do they have. - *Experience reports* of developing, using, and maintaining systems based on multiple languages and paradigms. Particular types of systems might include - industrial and commercial applications of MPP; - implementing and using different languages on virtual machines (e.g., the JVM and .NET VM); - mixing languages and paradigms for multitier applications (e.g., Internet and enterprise-IT systems); - using scripting language “layers” in applications or embedded systems for greater productivity and efficiency. - A *roadmap of challenges and directions* for language and platform technologies driven by the desire to support a MPP-based approach. -- Dean Wampler coauthor of Programming Scala (O'Reilly) - http://programmingscala.com twitter: @deanwampler, @chicagoscala blog: http://blog.polyglotprogramming.com Chicago-Area Scala Enthusiasts (CASE): - http://groups.google.com/group/chicagoscala - http://www.meetup.com/chicagoscala/ (Meetings) http://www.linkedin.com/in/deanwampler http://www.polyglotprogramming.com http://aquarium.rubyforge.org http://www.contract4j.org -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Newbie question on XML processing
Tzach, I'd start will clojure.xml. At a very high level, my program would look like this 1. Load the xml file with clojure.xml/parse 2. Apply your filtering code with something like map-if (see below) (defn map-if [pred f coll] (map #(if (pred %) (f %) %) coll)) 3. Use clojure.contrib.prxml to output the data. Hope this helps, Sean On Jan 7, 11:33 am, Tzach tzach.livya...@gmail.com wrote: Hello I have a simple task of reading an XML structure, manipulate part of it and writing it back to XML. For example, adding 1$ for each book with a year element after 2005 in the following example: ?xml version=1.0 encoding=UTF-8? bookstore book category=COOKING title lang=enEveryday Italian/title authorGiada De Laurentiis/author year2005/year price30.00/price /book book category=CHILDREN title lang=enHarry Potter/title authorJ K. Rowling/author year2006/year price29.99/price /book /bookstore clojure.contrib.zip-filter.xml is getting me close to this, but I still do not see how can I use it (or other library) to modify values. What would be the idiomatic (and easiest) way to do that? I apologize in advance if this is too trivial. Thanks Tzach -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Leiningen uberjar: excluding dev-dependencies; new minus-clojure task
On Jan 6, 6:07 pm, Perry Trolard trol...@gmail.com wrote: I suppose I could create a leiningen project for my clj script, specifying libraries I want as dependencies then just putting its uberjar on the classpath, but this requires that the libraries are available in maven repos. Have other leiningen users solved this? Have you looked at http://clojars.org ? It seems to have solved the libraries available in maven repos problem. Saul -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Recommended JVM flags for Clojure
Have you tried running with escape analysis on? It might help take some of the burden off the garbage collector. -XX:+DoEscapeAnalysis On Jan 7, 4:20 am, Gabi bugspy...@gmail.com wrote: Hello fellow Clojurians, I got lots of java.lang.OutOfMemoryError: GC overhead limit exceeded exceptions ,and after a short investigation added the following flags (JVM 1.6.0_17): -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX: +CMSIncrementalPacing These flags seems to solve the problem, but I am interested in your experience and best practices regarding JVM flags in clojure. I know it really depends on the type of the application, but it seems to me that the gc is working really hard under Clojure (I cannot prove it, this is just an impression) Gabi -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: SLIME/Swank problem with swank.util.sys/get-pid and RuntimeMXBean
I agree with Steven on this. As one who uses emacs and SLIME for both common lisp and clojure, I'd like to be able to use the current SLIME HEAD for clojure development work. I consider the fact that swank-clojure and the SLIME HEAD don't play nicely with each other to be a deficiency of swank-clojure. It may be that the right fix is to fix SLIME, but I see recommending a different mechanism of installing SLIME (via ELPA) as the fix to be an ugly hack. My personal hack-fix-of-choice is to check out version 3b3f604c396f0c5ceb8bc5a13fa41061bcc96184 from the slime git repo. It's true that this is fundamentally no better than what ELPA is doing, but at least I know what version of SLIME i need to make things work. It would be great if swank-clojure and/or slime were fixed so that the SLIME HEAD worked with swank-clojure. I don't want to have to use ELPA, or maven, or some other configuration management thing to get basic tools like an editing environment for the language up and running. Perhaps I should just bite the bullet and use the crazy configuration/package management things that the clojure community seems so enamored of (ELPA, maven, leiningen, etc...), but in the way I'm used to doing things, nothing more than the source code and a fairly simple system definition tool (like ASDF) are enough to get things done. It's not too say that there's room for improvement, but I like it when simple tools get the job done and I don't need to rely on a bunch of shell scripts, to have to modify classpaths, restart JVMs, etc... to get the code I want loaded. Perhaps I'm just ignorant of the proper clojure-y way to do things, so I'll hop off my soapbox now. cyrus On Jan 7, 2010, at 5:38 PM, Steven E. Harris wrote: Phil Hagelberg p...@hagelb.org writes: Could you try installing SLIME via ELPA as recommended in the swank-clojure readme? That will be a project I'll have to defer until the weekend, as I've never used ELPA. I use the CVS SLIME almost daily for Common Lisp work, so I'm reluctant to give it up. Also, it's not a tenable situation to fork SLIME for Clojure support. CVS head is known to have introduced incompatibilities with Clojure. Is the git repository at git://git.boinkor.net/slime.git just tracking the CVS repository, or is that the same as the ELPA-hosted one? I did try all of this with the git version and found the exact same behavior as with the CVS version. -- Steven E. Harris -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: [ANN] clj-peg v0.6 released
On Mon, Jan 4, 2010 at 11:27 PM, Richard Lyman richard.ly...@gmail.com wrote: This project adds support in Clojure for Parsing Expression Grammars. You'll be able to write pseudo-ebnfs directly in your Clojure code. Sounds nice, but where's the source code? Cheers, mk -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Having difficulties with compilation in slime, emacs and clojure-project
Hello, I have an emacs setup on OSX using elpa with the latest clojure-mode, swank-clojure, slime, slime-repl all from ELPA. When I upgraded to the latest swank-clojure in ELPA (swank-clojure-1.1.0), I began to get this error as well: Searching for program: no such file or directory, lisp I traced it back a bit, and found that the before advice on slime-read- interactive-args wasn't being called. It apparently wasn't activated. I evaluated the following form: (ad-activate 'slime-read-interactive-args) And now all seems to be working well. I'm not sure why this advice hasn't been activated. On the prior versions of swank-clojure, I didn't have this problem. Loading order issue maybe? Anyhow, try explicitly activating that advice and see if that fixes your problem. Cheers, Joel -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Interesting Clojure job in New York
Hi folks, We're looking for someone savvy with Clojuresque ways of thinking, excited by phrases like Monte Carlo simulation, Bayesian inference, and combinatorial optimization, willing to travel to New York for intense, engaging work, and (we hope!) motivated by an interest in education, cognition or just a satisfying problem. I come from the Scala side of the object/typing fence through the functional-Java countryside — but I come in peace. We, a well-established but fast-growing educational technology company, have a very cool medium-term (three-to-six-month) project calling for an excellent developer. (Of course there's the possibility of staying on for more.) Please contact me if you find such things interesting and would like to tell or hear more. ~aaron Aaron Harnly Wireless Generation http://www.wirelessgeneration.com -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Probability Monad
Hi,
I'm new to monads in clojure, and I'm loving them, they're really awesome!
But right now I need some help. Either I'm using dist-m wrong, or it's
a bug I've found.
It can be reproduced with:
clojure commit f4c58e3500b3668a0941ca21f9aa4f444de2c652
clojure-contrib commit 25fec5b5771408c30b802b67dc14a15043446a12
Both commits are for the master branch. These are the latest versions
of clojure and clojure-contrib sources that I just pulled this
morning.
This code doesn't work:
(use 'clojure.contrib.monads)
(use 'clojure.contrib.probabilities.finite-distributions)
(def die (uniform [1 2 3 4 5 6]))
(domonad dist-m
[a die
b die]
[+ a b])
The error that I get:
java.lang.ClassCastException: java.lang.Integer cannot be cast to
java.util.Map$Entry
[Thrown class java.lang.RuntimeException]
Restarts:
0: [ABORT] Return to SLIME's top level.
1: [CAUSE] Throw cause of this exception
Backtrace:
0: clojure.lang.LazySeq.sval(LazySeq.java:47)
1: clojure.lang.LazySeq.seq(LazySeq.java:56)
2: clojure.lang.RT.seq(RT.java:440)
3: clojure.core$seq__4245.invoke(core.clj:105)
4: clojure.core$reduce__4500.invoke(core.clj:657)
5:
clojure.contrib.probabilities.finite_distributions$fn__6616$m_bind_dist__6620.invoke(finite_distributions.clj:36)
6: user$eval__97.invoke(NO_SOURCE_FILE:1)
7: clojure.lang.Compiler.eval(Compiler.java:4642)
8: clojure.core$eval__5236.invoke(core.clj:2017)
9: swank.commands.basic$eval_region__22.invoke(basic.clj:40)
10: swank.commands.basic$eval_region__22.invoke(basic.clj:31)
11: swank.commands.basic$listener_eval__36.invoke(basic.clj:54)
12: clojure.lang.Var.invoke(Var.java:359)
13: user$eval__94.invoke(NO_SOURCE_FILE)
14: clojure.lang.Compiler.eval(Compiler.java:4642)
15: clojure.core$eval__5236.invoke(core.clj:2017)
16: swank.core$eval_in_emacs_package__249.invoke(core.clj:59)
17: swank.core$eval_for_emacs__326.invoke(core.clj:128)
18: clojure.lang.Var.invoke(Var.java:367)
19: clojure.lang.AFn.applyToHelper(AFn.java:179)
20: clojure.lang.Var.applyTo(Var.java:476)
21: clojure.core$apply__4370.invoke(core.clj:436)
22: swank.core$eval_from_control__252.invoke(core.clj:66)
23: swank.core$eval_loop__255.invoke(core.clj:71)
24: swank.core$spawn_repl_thread__387$fn__418$fn__420.invoke(core.clj:183)
25: clojure.lang.AFn.applyToHelper(AFn.java:171)
26: clojure.lang.AFn.applyTo(AFn.java:164)
27: clojure.core$apply__4370.invoke(core.clj:436)
28: swank.core$spawn_repl_thread__387$fn__418.doInvoke(core.clj:180)
29: clojure.lang.RestFn.invoke(RestFn.java:402)
30: clojure.lang.AFn.run(AFn.java:37)
31: java.lang.Thread.run(Thread.java:619)
If I'm using dist-m correctly, I figured the reason might be that
m-bind uses merge-with to merge a collection of vectors, whereas
merge-with works with maps..?
I tried (merge-with + [:a 1] [:b 1]) and got a similar error:
clojure.lang.Keyword cannot be cast to java.util.Map$Entry
[Thrown class java.lang.ClassCastException]
Restarts:
0: [ABORT] Return to SLIME's top level.
Backtrace:
0: clojure.core$key__4739.invoke(core.clj:1036)
1: clojure.core$merge_with__5186$merge_entry__5188.invoke(core.clj:1932)
2: clojure.lang.ArrayChunk.reduce(ArrayChunk.java:50)
3: clojure.core$reduce__4500.invoke(core.clj:666)
4: clojure.core$merge_with__5186$merge2__5191.invoke(core.clj:1937)
5: clojure.core$reduce__4500.invoke(core.clj:668)
6: clojure.core$reduce__4500.invoke(core.clj:659)
7: clojure.core$merge_with__5186.doInvoke(core.clj:1938)
8: clojure.lang.RestFn.invoke(RestFn.java:443)
9: user$eval__140.invoke(NO_SOURCE_FILE:1)
snip
I modified dist-m to evaluate a map instead of a vector, like this:
(defmonad dist2-m
[m-result (fn m-result-dist [v]
{v 1})
m-bind (fn m-bind-dist [mv f]
(reduce (partial merge-with +)
(for [[x p] mv [y q] (f x)]
{y (* q p)})))
])
And now this code:
(domonad dist2-m
[a die
b die]
(+ a b))
yields:
{2 1/36, 3 1/18, 4 1/12, 5 1/9, 6 5/36, 7 1/6, 8 5/36, 9 1/9, 10 1/12,
11 1/18, 12 1/36}
as expected.
Perhaps there's something I'm missing here?
Thanks,
Joel Rosario.
--
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Re: SLIME/Swank problem with swank.util.sys/get-pid and RuntimeMXBean
I don't want to have to use ELPA, or maven, or some other configuration management thing to get basic tools like an editing environment for the language up and running. Perhaps I should just bite the bullet and use the crazy configuration/package management things that the clojure community seems so enamored of (ELPA, maven, leiningen, etc...), but in the way I'm used to doing things, nothing more than the source code and a fairly simple system definition tool (like ASDF) are enough to get things done. It's not too say that there's room for improvement, but I like it when simple tools get the job done and I don't need to rely on a bunch of shell scripts, to have to modify classpaths, restart JVMs, etc... to get the code I want loaded. Perhaps I'm just ignorant of the proper clojure-y way to do things, so I'll hop off my soapbox now. I think I'm pretty familiar with the Clojure-y way to do things, and I also close the tab when I see ... using Maven. My setup is: * Installing some trivial Emacs stuff through ELPA (but not all: e.g., some packages fail to build). I'm a recent Emacs convert, so this seemed easy. * Building swank-clojure myself. * Installing the Emacs side myself the old-fashioned way. * Storing my stuff in git. * Building jars using ant. * Launching the appropriate swank server with the right classpath using a generic 'swank-clj' script that understands the same .clojure files as my 'clj' script. No Maven, little ELPA, no Clojure project-building scripts, nothing swank-related configured through emacs. I don't like libraries which want to download their own dependency jars: most projects on which I work integrate at least a dozen libraries, many of which share dependencies (Commons Logging, for example), and I inevitably need to manage those myself. Neither do I want a tool to download a Clojure jar for me: I manage that myself, because I want to keep up-to-date, and I need to maintain patches against contrib. Every time I've tried to use Maven I've given up in disgust as it downloaded hundreds of megs of jars I already had, and didn't want to have to manually re-package for my company's existing deployment infrastructure. Ah, Java. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
