Re: Elegant way of expressing this in Clojure?
Hi, On May 27, 9:50 pm, Laurent PETIT laurent.pe...@gmail.com wrote: But you will still have the cost of creating 2 or 3 times several millions of Seq objects, even if they are quickly made GCable. But then: why do it in Clojure, when you need close control anyway? I see the main benefit in Clojure in having very high-level structures available. If their use is not feasible, why not simply drop down to Java or Assembly or whatever? The resulting Clojure code will be just as ugly anyway. The OP said that arrays will be several gigabytes in size, so even if the set of different docs in much less than that by an order of magnitude (or even 2), memoizing a million of docs and then being forced to kill the VM may not be an option for him ! Ah ok. The OP said also, that loading a new document invalidates the previous one, which I understood as it releases the resources of the previous one. Buffers and such. But you would still have references to now invalid structures building up in the memoize cache. You are right. Here the modified memoize could come in handy with a FifoStrategy and queue size of 1. So as soon as the next document is loaded the previous one would drop out of the memoize cache. Sincerely Meikel -- 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: Which GUI toolkit would you like to see wrapped in an idiomatic Clojure library?
2010/5/28 Luke VanderHart luke.vanderh...@gmail.com Why not design it so that it can be backed by Swing or SWT or HTML (perhaps with some AJAX) or whatever? It seems kind of silly to do an abstraction on a single backend, don't you think? Ideally, yes. In practice, I'd rather implement one framework well than implement only the lowest common denominator of several. We're not just talking creating a window with menus and a few buttons - My project, for example, is a word processor. Having a requirement that it work across multiple GUI toolkits sounds a little bit hellish. That said, I do plan the core API to be abstract enough from the underlying implementation that it could in theory be backed by a different framework. I just don't intend to do the work of providing bindings to multiple implementations and ensuring that behavior is consistent. If some enterprising soul wants to use the same basic interfaces to front an alternative implementation, I'll certainly try to make it conducive to that. But having a API with seamlessly interchangeable back-ends doesn't sound very feasible. By the way, do the SWT people only come out at night? Or is it a US vs Europe issue? Seems somewhat curious that 7 in a row vote for Swing, then the next 4 are all SWT advocates. Should I expect the QT fans to show up tomorrow? :p From my little experience with counterclockwise (clojure eclipse plugin adoption), there seems clearly to be more adoption of Eclipse technologies in Europe than in USA. That said, and being an Eclipse guy myself at work, and given the arguments that say deployment is part of the dev job (which is partly true, deployment is often devoted to specialized teams, not necessarily the dev teams), I maintain my idea that starting with Swing may be easier for you. The ideas of interfaces done with Swing not being performant enough seem dated to me. IntelliJ IDEA, the new generation of Netbeans have certainly proven that it is possible to write big professional applications with Swing. My 0.02 €, -- Laurent -- 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: Elegant way of expressing this in Clojure?
2010/5/28 Meikel Brandmeyer m...@kotka.de Hi, On May 27, 9:50 pm, Laurent PETIT laurent.pe...@gmail.com wrote: But you will still have the cost of creating 2 or 3 times several millions of Seq objects, even if they are quickly made GCable. But then: why do it in Clojure, when you need close control anyway? I see the main benefit in Clojure in having very high-level structures available. If their use is not feasible, why not simply drop down to Java or Assembly or whatever? The resulting Clojure code will be just as ugly anyway. Agreed. But the question was how to stick with clojure, write it the most elegantly while still being performant :) The OP said that arrays will be several gigabytes in size, so even if the set of different docs in much less than that by an order of magnitude (or even 2), memoizing a million of docs and then being forced to kill the VM may not be an option for him ! Ah ok. The OP said also, that loading a new document invalidates the previous one, which I understood as it releases the resources of the previous one. Buffers and such. But you would still have references to now invalid structures building up in the memoize cache. You are right. Here the modified memoize could come in handy with a FifoStrategy and queue size of 1. So as soon as the next document is loaded the previous one would drop out of the memoize cache. Indeed -- 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: Clojure Master on android
On 2010/05/28 01:45, MHOOO wrote: After reading on the dev group about running clojure on android I figured I might just as well try the hello-dalvik example myself. However the master branch fails because it is exhausing the heap?: -- tho...@lisper:~/sources/clojure$ ./hello-dalvik.sh Compiling HelloDalvik to . UNEXPECTED TOP-LEVEL ERROR: java.lang.OutOfMemoryError: Java heap space Anyone else experience this error? Try giving the dx command a bit more memory by adding something like: -Jmx1024m before --dex. For reference: I am not experiencing this problem on ubuntu lucid using openjdk. HTH, Remco -- 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 (with no Java experience) - how best to learn?
Re all Dave Pawson at Thu, 27 May 2010 20:08:53 +0100 wrote: DP Is there a wiki where all these info sources could be collected please? DP Sounds really quite useful to the newbie. Just FYI - I have special page (http://alexott.net/en/clojure/video.html) with links to video lectures/screencasts about Clojure -- With best wishes, Alex Ott, MBA http://alexott.blogspot.com/ http://alexott.net http://alexott-ru.blogspot.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: Newbie (with no Java experience) - how best to learn?
On 28 May 2010 08:30, Alex Ott alex...@gmail.com wrote: Re all Dave Pawson at Thu, 27 May 2010 20:08:53 +0100 wrote: DP Is there a wiki where all these info sources could be collected please? DP Sounds really quite useful to the newbie. Just FYI - I have special page (http://alexott.net/en/clojure/video.html) with links to video lectures/screencasts about Clojure Thanks Alex. How to link to it from the clojure setup? regards -- Dave Pawson XSLT XSL-FO FAQ. Docbook FAQ. http://www.dpawson.co.uk -- 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: Problem seeing fn metadata unless I eval or load a file
Actually it's a duplicate of ticket #270
http://www.assembla.com/spaces/clojure/tickets/270
On Thu, May 27, 2010 at 4:52 PM, Jim Menard jim.men...@gmail.com wrote:
Christophe,
Thank you for your research and for opening the ticket.
Jim
On Thu, May 27, 2010 at 9:59 AM, Christophe Grand christo...@cgrand.net
wrote:
Hi,
On Thu, May 27, 2010 at 3:28 PM, Jim Menard jim.men...@gmail.com
wrote:
I've given some functions metadata that I want to use elsewhere. My
problem is, I don't see the metadata I've added if I use or require
the namespace; I need to explicitly load the file (or eval the
function definitions manually in slime/swank) to see the metatada.
Here's some simple code that shows my problem. What am I doing wrong,
or not understanding about metadata?
;;; src/ctest/funcs.clj
(ns ctest.funcs)
(defn
#^{:wadl {:url /f1 :method GET :doc The f1 function.}}
f1 [] 42)
(defn
#^{:wadl {:url /f2 :method GET :doc The f2 function.}}
f2 [] eleventy-seven)
;;; src/ctest/core.clj
(ns ctest.core
(:use ctest.funcs))
(def wadl-meta (list (meta ctest.funcs/f1) (meta ctest.funcs/f2)))
There is indeed a bug in how defn copy metadata from the var to the fn:
user= (defn foo {:bar :baz} [] 42)
#'user/foo
user= (meta #'foo)
{:ns #Namespace user, :name foo, :file NO_SOURCE_PATH, :line 221,
:arglists ([]), :bar :baz}
user= (meta foo)
{:ns #Namespace user, :name foo}
user= (defn foo {:lucy :ethel} [] 43)
#'user/foo
user= (meta #'foo)
{:ns #Namespace user, :name foo, :file NO_SOURCE_PATH, :line 224,
:arglists ([]), :lucy :ethel}
user= (meta foo)
{:ns #Namespace user, :name foo, :file NO_SOURCE_PATH, :line 221,
:arglists ([]), :bar :baz}
There you see that the fn got the previous metadata and not the current.
I'm
going to open a ticket.
Christophe
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Re: Newbie (with no Java experience) - how best to learn?
Dave Pawson at Fri, 28 May 2010 08:56:40 +0100 wrote: DP On 28 May 2010 08:30, Alex Ott alex...@gmail.com wrote: Re all Dave Pawson at Thu, 27 May 2010 20:08:53 +0100 wrote: DP Is there a wiki where all these info sources could be collected please? DP Sounds really quite useful to the newbie. Just FYI - I have special page (http://alexott.net/en/clojure/video.html) with links to video lectures/screencasts about Clojure DP Thanks Alex. DP How to link to it from the clojure setup? I don't know - we could ask Rich (or somebody else) to add link to this page -- With best wishes, Alex Ott, MBA http://alexott.blogspot.com/ http://alexott.net http://alexott-ru.blogspot.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: Mersenne Twister
Hi Paul, On 27 May 2010 23:24, Paul Moore p.f.mo...@gmail.com wrote: Can someone recommend a good Mersenne Twister implementation I could use? A web search finds a number of implementations in Java - presumably I can use these via Java interop - is that a sensible thing to do? It is very sensible to use an existing java library in this case: i) the code exitsts so you don't have to write it, ii) it will probably have a reasonably nice interface to use from clojure, and iii) the performance will most likely be better. A quick Google found this page: http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/VERSIONS/JAVA/java.html If I'm not mistaken, these are the guys who wrote the original Mersenne twister paper. I'm also looking to parallelise my simulation, so I'd want to have multiple threads all generating random numbers. I'm not an expert in this field, if I just naively generate random numbers in multiple threads is that OK, or could it compromise the randomness? If there is an issue, has anyone got a pointer to a thread-safe MT implementation that I could use? First of all, the RNG will maintain internal state, so accessing it from multiple thread willy-nilly will corrupt that state. It could be that the implementation that you decide to go with will protect the internal state with locks in which case you're ok. The other thing to consider is speed: any kind of locking will slow down the RNG. So if in your application it's ok to have one RNG instance per thread, then you can avoid locking, and the speed penalty. On the other hand, if you want all of the threads to use the same RNG instance for some reason (e.g. deterministic behaviour) then you'll need to use a single RNG instance that is shared across your threads. If you do need deterministic behaviour it might be possible to seed all your RNG instances the same and that way produce deterministic behaviour across multiple RNG instances. I guess this depends on the MT implementation. Also, I'm not sure if this is possible with MT or not. Paul. -- ! Lauri -- 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: Elegant way of expressing this in Clojure?
On Thu, May 27, 2010 at 9:07 PM, CuppoJava patrickli_2...@hotmail.comwrote: The purpose is quite straightforward. I just have to call process() on every word in the w and d array. But I don't want to load docs if they have already been loaded. And I want to stop when it hits the first malformed document. Reading this whole thread, I can't keep wondering how you build your d and w arrays (are they the better data structure for the job) and what's the ratio of words/doc. Christophe -- Brussels, 23-25/6 http://conj-labs.eu/ Professional: http://cgrand.net/ (fr) On Clojure: http://clj-me.cgrand.net/ (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
Clojure script with shebangoid on windows
Hello! Short: It works, but is not perfect. (this may need an windows expert to make it better) After seeing a script for Scala using something shebang like for a windows system: scalascript.cmd ::#! @echo off call scala -savecompiled %0 %* goto :eof ::!# println(I didn't believe this.) argv.toList foreach Console.println end I tried this for Clojure. It seems that the Scala people did some special handling for this case, in order to let Scala ignore the lines from ::# to ::#. For Clojure I had to do this somehow manually. -clojurescript.cmd- ::#! @echo off REM (comment call java -jar clojure.jar -e (ns script (:require [clojure.core])) (do (def echo (ref nil)) (def off nil) (def goto nil) (def REM nil) :starting) %0 %* REM ) goto :eof ::!# (println \nI still would like to make this easier.) -end- Output is: D:\lang\clojuretestscript.cmd :starting I still would like to make this easier. D:\lang\clojure I actually dont completely understand whats happening. Any hints appreciated. Kind regards, alux -- 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
lein, slime, project management
Hello people, so, my questions are not about Clojure, they're about the tools of the trade. I hope no one will be bothered. In my opinion the tools are a part of this. So, the swank-clojure-project is gonna be deprecated and I should settle on slime-connect instead. Fine. But being a beginner with both Emacs and Slime, I'd appreciate some insight about what the usage patterns are supposed to be. I mean, what is gonna happen when I ask slime to compile the contents of a buffer ? Is it gonna produce a .class file ? Or a jar ? Where is it gonna put it ? Are the contents of the file gonna be available from that time on ? Or should I add the thing to the dependencies ? Right now, I connected to my lein based swank server, then I defined a small hello world function in a file. From the SLIME menu I choose compile defun and it doesn't complain about anything. I choose compile file and an error pops up with a stacktrace (ugh) and the third line in the stacktrace says something like user$eval__1975.invoke(NO_SOURCE_FILE) So, I wonder: what's going on ? Thanks for ANY hint Catonano -- La difesa più sicura contro il male è l'estremo individualismo, l'originalità di pensiero, la stravaganza, perfino, se volete, l'eccentricità… Il male va matto per la solidarietà. Less than one di Joseph Brodsky -- 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: Which GUI toolkit would you like to see wrapped in an idiomatic Clojure library?
I will send patches!! get on github no. ;) On 5/27/10, Luke VanderHart luke.vanderh...@gmail.com wrote: Thanks, Heinz... I may. Right now I'm still exploring what I want the API to be. I was hoping to achieve something a bit thicker that could insulate the user from Java classes completely. The user wouldn't even have to know Swing or handle JObjects or worry about the event thread... In other words, it wouldn't be a wrapper API for Swing, but a Clojure GUI api that, coincidentally, is /backed/ by Swing. This may be an unrealistic goal, but I've got pretty far down the path of designing it, though I definitely don't want to declare victory until I've figured out a strategy for covering every reasonably common use case. -Luke On May 27, 5:54 pm, Heinz N. Gies he...@licenser.net wrote: +1 For swing especially since I started this already. Look for clj-swing in github, since this seems quite a load of work I'd be glad for any help so :). Regards, Heinz On May 27, 2010, at 21:30 , Luc Préfontaine wrote: +1 for Swing. On Thu, 2010-05-27 at 11:59 -0700, Brian Schlining wrote: +1 Swing. +1 Swing. +1 Swing. There's a ton of documentation out there, and it got some -- 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 -- Sent from my mobile device Need somewhere to put your code? http://patch-tag.com Want to build a webapp? http://happstack.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
Datatype Usage Examples
L.S., I was wondering if someone could point me to recent usage examples of deftype, defrecord, and reify. Reading [1] helped a lot but it wasn't particularly easy to find it since it's not linked from the sidebar. Specifically, what I'd like to know is: - How to define and access member data fields -also mutable in case of deftype- to my ADTs. - Whether I can refer to type instances -an equivalent to the 'this' keyword in Java. - How to define constructors. Kind regards, SinDoc [1] http://clojure.org/datatypes -- 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: Mersenne Twister
Hi Paul, I've used Sean Luke's implementation quite a few times before: http://cs.gmu.edu/~sean/research/mersenne/MersenneTwister.java It is pretty good, fast and battle tested (it is used extensively in ECJ - an genetic algorithm and genetic programming java package, another project of his). Concerning generating random numbers in different threads, there is a simple Mersenne Twister extension you can use to ensure that all random generators are independent (or as independent as pseudorandom generators can be). It is detailed in this paper here, by the author of Mersenne Twister himself: http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/DC/dgene.pdf The only thing you will need is some sort of numerical unique ID for each thread - it can be sequencial or even generated randomly using Java UUIDs or the like. Hope this helps, Artur On May 27, 11:24 pm, Paul Moore p.f.mo...@gmail.com wrote: I want to write a reasonably high-performance simulation program in Clojure. For the random numbers, I'd prefer to use Mersenne Twister (for a number of reasons - it's a well-known, good RNG, and it's commonly used in a number of other languages I use, so it's a good baseline for comparing implementations). The Java RNG, which Clojure uses, is not MT, but Knuth's linear congruential RNG. Can someone recommend a good Mersenne Twister implementation I could use? A web search finds a number of implementations in Java - presumably I can use these via Java interop - is that a sensible thing to do? I'm also looking to parallelise my simulation, so I'd want to have multiple threads all generating random numbers. I'm not an expert in this field, if I just naively generate random numbers in multiple threads is that OK, or could it compromise the randomness? If there is an issue, has anyone got a pointer to a thread-safe MT implementation that I could use? Thanks, Paul. -- 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
57 varieties
I've been trying for the best part of a month to get SLIME/SWANK/ Clojure/clojure-mode working in emacs 23.2 on Mac OS X 10.5 without using ELPA, which unfortunately seems to break everything including itself in my setup. Using Bill Clementson's checkout recommendations (see below) I've got to the point where I can type in the Clojure 1.2.0 *inferior-lisp* REPL buffer (with no prompt) and have the reader eval output appear in the SLIME REPL buffer, but SLIME seems to think I'm in some unspecified Common Lisp (the prompt is CL-USER ) and I can't enter anything in the SLIME REPL. Here are the checkout URL recommendations I've gleaned: Bill Clementson: svn http://clojure.googlecode.com/svn/trunk/ git://github.com/jochu/clojure-mode.git git://github.com/jochu/swank-clojure.git svn http://clojure-contrib.googlecode.com/svn/trunk/ cvs common-lisp.net:/project/slime/cvsroot # AEvar's version git://github.com/richhickey/clojure.git git://github.com/technomancy/clojure-mode.git git://github.com/jochu/swank-clojure.git git://github.com/richhickey/clojure-contrib.git git://github.com/technomancy/slime.git # Brent Millare's version git://github.com/richhickey/clojure.git git://github.com/jochu/clojure-mode.git git://github.com/technomancy/swank-clojure.git git://github.com/richhickey/clojure-contrib.git git://github.com/technomancy/leiningen.git # http://riddell.us/ClojureWithEmacsSlimeSwankOnUbuntu.html: git://github.com/jochu/clojure-mode.git git://github.com/jochu/swank-clojure.git git://git.boinkor.net/slime.git I very much hope that you all can give me firm and final yes or no verdicts on each of these lines. -- Phil Hudson PGP/GnuPG ID: 0x887DCA63 -- 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: M-X slime
Hello! Thank you. It was just not fully downloaded clojure 1.2 I've asked lein to update all deps again and now it works. On 28 май, 04:10, Joost jo...@zeekat.nl wrote: On May 27, 8:24 pm, Oleg oleg.richa...@gmail.com wrote: Hello Guys! Yes, i know that i can run lein swank in my project directory and then use M-X + slime-connect in emacs. But all the time with clojure 1.1.0 i used this procedure: M-X cd to project directory and them just M-X slime (classpath is set relative to current emacs dir, so it finds swank-clojure.jar in lib directory). I feel myself very comfortable with that sequence and don't want to change it. Can somebody help me to make my M-X + slime works again, because i don't want to have additional step with lein swank in console. As far as I know, as long as you've got some command that starts a REPL and has the swank code in its path, you can use it as swank- clojure-binary. I did a blog post about that some months ago:http://joost.zeekat.nl/2009/12/03/choosing-your-clojure-startup-scrip... -- 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: Mersenne Twister
Hello Paul, The following thread [1] mentions the MT by Sean Luke [2]. If you compile/jar the source and put it into your classpath (e.g. / lib) you should be able to use it directly from your clojure project as shown in the thread. (Rich's answer) There is a synch'ed version and a fast one ... I'm no expert on this neither, but using multiple single-threaded twisters with different seeds should leave your randomness uncompromised I think. Cheers, -David [1] http://groups.google.com/group/clojure/browse_thread/thread/776943086de213f9/c39d198158994860 [2] http://www.cs.gmu.edu/~sean/research/ -- 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: Clojure Master on android
On May 28, 9:26 am, Remco van 't Veer rwvtv...@gmail.com wrote: Try giving the dx command a bit more memory by adding something like: -Jmx1024m before --dex. Unfortunately that didn't work quite so well. The java process ended up using 1.4GB ram without terminating (waited approximately 10 minutes before I killed it). I am using: --- tho...@lisper:/$ java -version java version 1.6.0_18 OpenJDK Runtime Environment (IcedTea6 1.8) (6b18-1.8-0ubuntu1) OpenJDK 64-Bit Server VM (build 14.0-b16, mixed mode) tho...@lisper:/$ uname -a Linux lisper 2.6.32-22-generic #33-Ubuntu SMP Wed Apr 28 13:28:05 UTC 2010 x86_64 GNU/Linux tho...@lisper:/$ cat /etc/*-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=10.04 DISTRIB_CODENAME=lucid DISTRIB_DESCRIPTION=Ubuntu 10.04 LTS -- The script I am using (hello-dalvik.sh): -- #!/bin/sh export ANDROID_DIR=/home/thomas/sources/android-sdk-linux_86 export CLOJURE_JAR=/home/thomas/sources/clojure/clojure.jar set -e rm -rf hello-dalvik; mkdir hello-dalvik; cd hello-dalvik echo '(ns HelloDalvik (:gen-class)) (defn -main [] (println (str hello dalvik from clojure (clojure-version' HelloDalvik.clj java -classpath $CLOJURE_JAR:. -Dclojure.compile.path=. clojure.lang.Compile HelloDalvik $ANDROID_DIR/platforms/android-8/tools/dx -Jmx1024m --dex -- output=classes.dex HelloDalvik*.class $CLOJURE_JAR $ANDROID_DIR/platforms/android-8/tools/aapt add HelloDalvik.jar classes.dex jar uf HelloDalvik.jar -C ../src/clj clojure/version.properties $ANDROID_DIR/tools/adb push HelloDalvik.jar /sdcard/ echo dalvikvm -classpath /sdcard/HelloDalvik.jar HelloDalvik \; exit | $ANDROID_DIR/tools/adb shell - Anything wrong with my configuration? -- 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: Which GUI toolkit would you like to see wrapped in an idiomatic Clojure library?
Yes but not too much yak shaving, it is important to run with the simplest thing that will work first. On 5/27/10, Jason Smith ja...@lilypepper.com wrote: Why not design it so that it can be backed by Swing or SWT or HTML (perhaps with some AJAX) or whatever? It seems kind of silly to do an abstraction on a single backend, don't you think? On May 27, 4:37 pm, Luke VanderHart luke.vanderh...@gmail.com wrote: Thanks, Heinz... I may. Right now I'm still exploring what I want the API to be. I was hoping to achieve something a bit thicker that could insulate the user from Java classes completely. The user wouldn't even have to know Swing or handle JObjects or worry about the event thread... In other words, it wouldn't be a wrapper API for Swing, but a Clojure GUI api that, coincidentally, is /backed/ by Swing. This may be an unrealistic goal, but I've got pretty far down the path of designing it, though I definitely don't want to declare victory until I've figured out a strategy for covering every reasonably common use case. -Luke On May 27, 5:54 pm, Heinz N. Gies he...@licenser.net wrote: +1 For swing especially since I started this already. Look for clj-swing in github, since this seems quite a load of work I'd be glad for any help so :). Regards, Heinz On May 27, 2010, at 21:30 , Luc Préfontaine wrote: +1 for Swing. On Thu, 2010-05-27 at 11:59 -0700, Brian Schlining wrote: +1 Swing. +1 Swing. +1 Swing. There's a ton of documentation out there, and it got some -- 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 -- Sent from my mobile device Need somewhere to put your code? http://patch-tag.com Want to build a webapp? http://happstack.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
Elegant way to replace a few words in string
Hello Guys!
I have a string for example Foo12 Bar130 Qoo20 and map like this
{Foo XF Bar XB Qoo XQ}.
I want get: XF12 XB130 XQ20
I want to replace words in string based on map association. What is
the elegant way to do it? Sure, i can use loop and recur
to make string enter the next replacement, but is there another way to
do it better?
Cheers, Oleg
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Re: Clojure Master on android
Hmm, I have a 32 bit setup to that's probably the issue: java version 1.6.0_18 OpenJDK Runtime Environment (IcedTea6 1.8) (6b18-1.8-0ubuntu1) OpenJDK Server VM (build 14.0-b16, mixed mode) Don't have a clue how to fix this. On 2010/05/28 11:06, MHOOO wrote: On May 28, 9:26 am, Remco van 't Veer rwvtv...@gmail.com wrote: Try giving the dx command a bit more memory by adding something like: -Jmx1024m before --dex. Unfortunately that didn't work quite so well. The java process ended up using 1.4GB ram without terminating (waited approximately 10 minutes before I killed it). I am using: --- tho...@lisper:/$ java -version java version 1.6.0_18 OpenJDK Runtime Environment (IcedTea6 1.8) (6b18-1.8-0ubuntu1) OpenJDK 64-Bit Server VM (build 14.0-b16, mixed mode) tho...@lisper:/$ uname -a Linux lisper 2.6.32-22-generic #33-Ubuntu SMP Wed Apr 28 13:28:05 UTC 2010 x86_64 GNU/Linux tho...@lisper:/$ cat /etc/*-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=10.04 DISTRIB_CODENAME=lucid DISTRIB_DESCRIPTION=Ubuntu 10.04 LTS -- The script I am using (hello-dalvik.sh): -- #!/bin/sh export ANDROID_DIR=/home/thomas/sources/android-sdk-linux_86 export CLOJURE_JAR=/home/thomas/sources/clojure/clojure.jar set -e rm -rf hello-dalvik; mkdir hello-dalvik; cd hello-dalvik echo '(ns HelloDalvik (:gen-class)) (defn -main [] (println (str hello dalvik from clojure (clojure-version' HelloDalvik.clj java -classpath $CLOJURE_JAR:. -Dclojure.compile.path=. clojure.lang.Compile HelloDalvik $ANDROID_DIR/platforms/android-8/tools/dx -Jmx1024m --dex -- output=classes.dex HelloDalvik*.class $CLOJURE_JAR $ANDROID_DIR/platforms/android-8/tools/aapt add HelloDalvik.jar classes.dex jar uf HelloDalvik.jar -C ../src/clj clojure/version.properties $ANDROID_DIR/tools/adb push HelloDalvik.jar /sdcard/ echo dalvikvm -classpath /sdcard/HelloDalvik.jar HelloDalvik \; exit | $ANDROID_DIR/tools/adb shell - Anything wrong with my configuration? -- 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: Elegant way to replace a few words in string
(reduce
(fn [#^String s [#^CharSequence what #^CharSequence with]]
(.replace s what with))
Foo12 Bar130 Qoo20
{Foo XF Bar XB Qoo XQ})
2010/5/28 Oleg oleg.richa...@gmail.com
Hello Guys!
I have a string for example Foo12 Bar130 Qoo20 and map like this
{Foo XF Bar XB Qoo XQ}.
I want get: XF12 XB130 XQ20
I want to replace words in string based on map association. What is
the elegant way to do it? Sure, i can use loop and recur
to make string enter the next replacement, but is there another way to
do it better?
Cheers, Oleg
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Re: Elegant way of expressing this in Clojure?
d,w are arrays that are passed to me by a machine learning algorithm so it's not something that I have control over. There are roughly 100 words per doc. Thanks for everyone's help. I wonder if directly mutable primitives is something that is hard to put into Clojure? Or something that's explicitly avoided because it distracts from the FP paradigm. The lack of them is making this code somewhat awkward to write. -Patrick On May 28, 4:44 am, Christophe Grand christo...@cgrand.net wrote: On Thu, May 27, 2010 at 9:07 PM, CuppoJava patrickli_2...@hotmail.comwrote: The purpose is quite straightforward. I just have to call process() on every word in the w and d array. But I don't want to load docs if they have already been loaded. And I want to stop when it hits the first malformed document. Reading this whole thread, I can't keep wondering how you build your d and w arrays (are they the better data structure for the job) and what's the ratio of words/doc. Christophe -- Brussels, 23-25/6http://conj-labs.eu/ Professional:http://cgrand.net/(fr) On Clojure:http://clj-me.cgrand.net/(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: 57 varieties
On Fri, May 28, 2010 at 4:09 PM, Philip Hudson phil.hud...@iname.com wrote: I've been trying for the best part of a month to get SLIME/SWANK/Clojure/clojure-mode working in emacs 23.2 on Mac OS X 10.5 without using ELPA, which unfortunately seems to break everything including Here are my instructions for a completely manual setup which works very well for me, I keep syncing with technomancy's branch: http://github.com/vu3rdd/swank-clojure/raw/master/config.txt http://github.com/vu3rdd/swank-clojure -- Ramakrishnan -- 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: Elegant way of expressing this in Clojure?
Hi, On May 28, 3:09 pm, CuppoJava patrickli_2...@hotmail.com wrote: Thanks for everyone's help. I wonder if directly mutable primitives is something that is hard to put into Clojure? Or something that's explicitly avoided because it distracts from the FP paradigm. The lack of them is making this code somewhat awkward to write. Wasn't deftype providing mutable primitive fields if necessary? Sincerely Meikel -- 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 about vector performance
Hi all, I am new to the list and to Clojure. I have been working in implementing some 2D cellular automata (CA) just to have a project to teach Clojure to myself. After some work I have something that works, but it is pretty slow. The function that takes a CA of 500x500 cells (integers) and returns an updated (*) copy takes 4 s. (using Clojure vectors), while doing more or less the same in Java (using arrays and primitive types) takes more or less 16 *ms.*. I expected some difference, but not that big. Before trying to use Java arrays and primitive types in Clojure, I would like to know how my Clojure approach can be improved (I am willing to sacrifice some performance to keep it more Clojure, but not that much). As I do not want to post a bunch of horrible code full of comments and not properly indented, I have extracted what i hope are the main pieces, written some comments and posted it here: http://snipt.org/Okpk Pasting that code in a new file in Eclipse (I am using counterclockwise) and running it in the REPL prints this: Clojure 1.1.0-alpha-SNAPSHOT Elapsed time: 4355.363706 msecs Elapsed time: 4416.98562 msecs 1:1 user= #Namespace cellular-automata-basic 1:2 cellular-automata-basic= I would thank a lot any hint, suggestion, comment, or whatever... :-) Best regards, Rubén (*) The update consists on adding the values of the 8 neighbours of every cell and changing it if that sum is between two fixed numbers. -- Rubén BÉJAR HERNÁNDEZ Dpto. de Informática e Ingeniería de Sistemas - Universidad de Zaragoza (Computing and Systems Engineering Department - Universidad de Zaragoza) c/ María de Luna 1, 50018 Zaragoza, Spain Tel: (+34) 976 76 2332 (Fax: 1914) e-mail: rbe...@unizar.es Grupo IA3 (IA3 Laboratory) - http://iaaa.cps.unizar.es -- 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: Which GUI toolkit would you like to see wrapped in an idiomatic Clojure library?
For those of you complaining about the Swing LAF, learn to use the UIManager class :) (defn set-laf! [laf-name] (javax.swing.UIManager/setLookAndFeel laf-name)) On May 27, 7:51 pm, Armando Blancas armando_blan...@yahoo.com wrote: Remember, the actual API won't matter - that will be completely abstracted away. So try to focus on the framework's look and feel. Thanks! -Luke SWT, because of the native look and feel. I really don't like the looks of Swing. As a user of some Swing app, I don't find solace from thinking how convenient it was for the programmers to deliver that thing to me. As a developer, dealing with the packaging/deployment just comes with the job and the results, I think, are well worth the effort. -- 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: Elegant way of expressing this in Clojure?
On Fri, May 28, 2010 at 3:09 PM, CuppoJava patrickli_2...@hotmail.comwrote: d,w are arrays that are passed to me by a machine learning algorithm so it's not something that I have control over. There are roughly 100 words per doc. ok Thanks for everyone's help. I wonder if directly mutable primitives is something that is hard to put into Clojure? Or something that's explicitly avoided because it distracts from the FP paradigm. The lack of them is making this code somewhat awkward to write. In this case there is no need for mutable primitives. You can try a direct translation of your java code: (let [n (alength w)] (loop [doc (int -1) i (int 0)] (when ( i n) (let [new-doc (aget d i) (when-not (= doc new-doc) (load doc)) (when-not (malformed doc) (process new-doc (aget w i)) (recur new-doc (inc i))) You can tweeak it here and there (== and unchecked-inc for example) and don't forget to typehint d and w if Clojure doesn't infer their type. Christophe -- Brussels, 23-25/6 http://conj-labs.eu/ Professional: http://cgrand.net/ (fr) On Clojure: http://clj-me.cgrand.net/ (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: Which GUI toolkit would you like to see wrapped in an idiomatic Clojure library?
I work on .Net, so my observation could be totally wrong, but I think JavaFx could be an option to consider (specially because of its JSON kind of syntax). I am working on a WPF project currently, and although WPF is big and complex, the kind of UIs one can build with it is amazing, and JavaFx looked similar to me in intent and purpose. So I am really surprised why no one mentioned JavaFx. Is it because it's new? On May 27, 11:18 am, Luke VanderHart luke.vanderh...@gmail.com wrote: My side project is a fairly complex GUI application written in Clojure. Recently, I've become irritated with using Java interop for everything. It's not that Clojure doesn't have nice java interop - it does. It's just that when interacting with a GUI framework, which is a large part of my app, I have to be back in mutable object-oriented land, worrying about class hierarchies, mutable state, locks, etc. Yucky. So, with a perhaps dangerous lack of sanity and without any guarantee of success, I've decided to try my hand at writing an idiomatic Clojure GUI library. If I have success (which I doubt) I will of course make it available as open source. I intend for it to be mostly declarative, with a nice DSL for defining GUI elements. Each component will also implement map, and use one of Clojure's reference types as an interface for inspecting / updating its state. I may also implement some aspects of Functional Reactive Programming wherever it's convenient to do so. What you all must help me decide is what GUI framework to use as the underpinnings of it. It's genuinely hard to decide. I have at least some experience with all of them, so I have no strong preference, but I'd like to get your input. I did consider trying to make it abstract enough that you could plug in *any* of them under the hood, but there's enough differences between the frameworks that that would get very ugly very fast. Possibilities are: AWT Pros: native widgets, bundled with Java, low-level Cons: few widgets, considered somewhat obselete Swing Pros: bundled with Java, good widget selection Cons: non-native widgets SWT Pros: native widgets, widely used Cons: requires platform-specific libs QT Jambi Pros: native widgets, huge widget selection, highly-regarded framework Cons: requires platform-specific libs, writing custom widgets is hairy, momentum and support seem to be lagging since Nokia dropped official support. Remember, the actual API won't matter - that will be completely abstracted away. So try to focus on the framework's look and feel. Also let me know if I've missed any of the framework's key characteristics. Thanks! -Luke -- 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: Datatype Usage Examples
Hi, On May 28, 9:52 am, SinDoc s...@khakbaz.com wrote: I was wondering if someone could point me to recent usage examples of deftype, defrecord, and reify. Reading [1] helped a lot but it wasn't particularly easy to find it since it's not linked from the sidebar. Specifically, what I'd like to know is: - How to define and access member data fields -also mutable in case of deftype- to my ADTs. - Whether I can refer to type instances -an equivalent to the 'this' keyword in Java. - How to define constructors. The modified memoize sparked some examples for this: http://kotka.de/blog/2010/03/memoize_done_right.html#protocols Sincerely Meikel -- 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: Which GUI toolkit would you like to see wrapped in an idiomatic Clojure library?
On Fri, May 28, 2010 at 7:29 PM, mmwaikar mmwai...@gmail.com wrote: QT Jambi Pros: native widgets, huge widget selection, highly-regarded framework Cons: requires platform-specific libs, writing custom widgets is hairy, momentum and support seem to be lagging since Nokia dropped official support. I would love to see an idiomatic clojure QtJambi wrapper that solves the writing custom widgets is hairy problem. martin -- 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: Which GUI toolkit would you like to see wrapped in an idiomatic Clojure library?
My understanding may be wrong, but I think JavaFX is intended more as a competitor to Flash or Silverlight than a GUI toolkit. It'd probably be great for a Clojure games framework, or for simple graphical drawing and such, but I'm not sure it's appropriate for a complex, high performance GUI. In fact, according to the Wiki page, if you want to use desktop style widgets, you actually end up embedding Swing components *within* JavaFX anyway. On May 28, 9:59 am, mmwaikar mmwai...@gmail.com wrote: I work on .Net, so my observation could be totally wrong, but I think JavaFx could be an option to consider (specially because of its JSON kind of syntax). I am working on a WPF project currently, and although WPF is big and complex, the kind of UIs one can build with it is amazing, and JavaFx looked similar to me in intent and purpose. So I am really surprised why no one mentioned JavaFx. Is it because it's new? On May 27, 11:18 am, Luke VanderHart luke.vanderh...@gmail.com wrote: My side project is a fairly complex GUI application written in Clojure. Recently, I've become irritated with using Java interop for everything. It's not that Clojure doesn't have nice java interop - it does. It's just that when interacting with a GUI framework, which is a large part of my app, I have to be back in mutable object-oriented land, worrying about class hierarchies, mutable state, locks, etc. Yucky. So, with a perhaps dangerous lack of sanity and without any guarantee of success, I've decided to try my hand at writing an idiomatic Clojure GUI library. If I have success (which I doubt) I will of course make it available as open source. I intend for it to be mostly declarative, with a nice DSL for defining GUI elements. Each component will also implement map, and use one of Clojure's reference types as an interface for inspecting / updating its state. I may also implement some aspects of Functional Reactive Programming wherever it's convenient to do so. What you all must help me decide is what GUI framework to use as the underpinnings of it. It's genuinely hard to decide. I have at least some experience with all of them, so I have no strong preference, but I'd like to get your input. I did consider trying to make it abstract enough that you could plug in *any* of them under the hood, but there's enough differences between the frameworks that that would get very ugly very fast. Possibilities are: AWT Pros: native widgets, bundled with Java, low-level Cons: few widgets, considered somewhat obselete Swing Pros: bundled with Java, good widget selection Cons: non-native widgets SWT Pros: native widgets, widely used Cons: requires platform-specific libs QT Jambi Pros: native widgets, huge widget selection, highly-regarded framework Cons: requires platform-specific libs, writing custom widgets is hairy, momentum and support seem to be lagging since Nokia dropped official support. Remember, the actual API won't matter - that will be completely abstracted away. So try to focus on the framework's look and feel. Also let me know if I've missed any of the framework's key characteristics. Thanks! -Luke -- 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: Which GUI toolkit would you like to see wrapped in an idiomatic Clojure library?
I would love to see an idiomatic clojure QtJambi wrapper that solves the writing custom widgets is hairy problem. I think QT Jambi's basic architecture precludes this. Jambi is basically a bunch of JNI calls to a backend C++ QT app. As soon as you start delving into Jambi's internals, you end up in C++ land. -- 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
Android 'dex' stage takes a very long time with Clojure
I'm new to Android, but I've been wanting to give it a try for a while so I thought I'd try using Clojure's master branch. It all seems to be working fairly well except the dex stage of installation takes around 2 minutes for a simple Hello World app. How do others get around this lag? I'm pretty sure it's caused by the large clojure.core namespace, as I've already taken everything else that I can out of the clojure jar file. I'm just not sure if there's anything else I can do. I am using emacs and android-mode, if that is of any help. I've also tried giving it more memory as suggested here: http://groups.google.com/group/clojure/msg/c38e015582cf7623 Thanks a lot Matt -- 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: Which GUI toolkit would you like to see wrapped in an idiomatic Clojure library?
+1 Swing If I had my druthers I would go with QtJambi, but since Nokia dropped development for that it has not been able to keep pace with Qt. So that would be immediately out of sync. Plus the need for platform native compiled code is a minus. Fine for the main three (Linux, Mac, Windows) with precompiled libs, but separate compile for anything else equals ongoing maintenance effort. This defeats the point of having a cross-platform language. Java and Clojure will work (.e.g, on FreeBSD, OpenSolaris, AIX), but the GUI won't unless you make extra C/C++ coding effort? SWT is a minus due to native code needs, too much XML configuration, and the fact that it does not look nearly as good as some people think when used cross-platform. Looks fine on Windows, the Mac side is getting better now that they are starting to use Cocoa underneath, Linux side is questionable with varying appearance across different window managers. Other OS? This is the same as for QtJambi, extra C/C+ + coding effort needed to be really cross-platform. No reason to go with AWT exclusively. A lot of Swing wraps parts of or needs AWT anyway. You can't really get away from it and will be cutting off a limb, so to speak, if you go with it rather than Swing first. A lot of the misgivings about Swing look and feel across platform boils down to bad GUI development efforts. I have seen this many times. Many developers just do not understand the specific interface needs across different platforms and just leave parameters at the default settings, which only by luck will be near optimal. I have developed a number of Swing applications that look pretty close to native (at least on Linux, Mac, Windows, Solaris) so I can say that it takes some attention to platform specific details to make this happen (and access to multiple OS). That is what it takes to develop a serious professional cross-platform desktop application, no way around it (you would even have to do this if going with QtJambi or SWT). Overall, I would go with Swing. The main reason is that it will already be cross-platform on any Java compliant OS that can run Clojure. I think that is the most important thing if you want a GUI to go along with the language. Nothing additional is needed to complicate matters, besides the GUI layer/framework on top of Clojure. Nonetheless, the best idea would be to ensure you have enough abstraction in your implementation so that other GUI toolkits could be almost dropped in place later on. That is, it should not close out other toolkits, but going with what will work now or sooner than later is better. Going with Swing is a way to get something out soon without having to spend additional effort worrying about C/C++ libraries, packaging and so on. Get something to work, then the additional toolkits can come. -- 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: Which GUI toolkit would you like to see wrapped in an idiomatic Clojure library?
I vote for Swing. Swing components conform to JavaBeans specification, so a generic Clojure library to construct and manipulate JavaBeans would make a large part of the GUI framework. On 27 май, 19:18, Luke VanderHart luke.vanderh...@gmail.com wrote: My side project is a fairly complex GUI application written in Clojure. Recently, I've become irritated with using Java interop for everything. It's not that Clojure doesn't have nice java interop - it does. It's just that when interacting with a GUI framework, which is a large part of my app, I have to be back in mutable object-oriented land, worrying about class hierarchies, mutable state, locks, etc. Yucky. So, with a perhaps dangerous lack of sanity and without any guarantee of success, I've decided to try my hand at writing an idiomatic Clojure GUI library. If I have success (which I doubt) I will of course make it available as open source. I intend for it to be mostly declarative, with a nice DSL for defining GUI elements. Each component will also implement map, and use one of Clojure's reference types as an interface for inspecting / updating its state. I may also implement some aspects of Functional Reactive Programming wherever it's convenient to do so. What you all must help me decide is what GUI framework to use as the underpinnings of it. It's genuinely hard to decide. I have at least some experience with all of them, so I have no strong preference, but I'd like to get your input. I did consider trying to make it abstract enough that you could plug in *any* of them under the hood, but there's enough differences between the frameworks that that would get very ugly very fast. Possibilities are: AWT Pros: native widgets, bundled with Java, low-level Cons: few widgets, considered somewhat obselete Swing Pros: bundled with Java, good widget selection Cons: non-native widgets SWT Pros: native widgets, widely used Cons: requires platform-specific libs QT Jambi Pros: native widgets, huge widget selection, highly-regarded framework Cons: requires platform-specific libs, writing custom widgets is hairy, momentum and support seem to be lagging since Nokia dropped official support. Remember, the actual API won't matter - that will be completely abstracted away. So try to focus on the framework's look and feel. Also let me know if I've missed any of the framework's key characteristics. Thanks! -Luke -- 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: Clojure script with shebangoid on windows
On 28 May 2010 09:48, alux alu...@googlemail.com wrote: Hello! Short: It works, but is not perfect. (this may need an windows expert to make it better) Try this: --- myscript.bat --- :x (comment @echo off java -cp clojure.jar clojure.main %~f0 %* goto eof ) (println Hi! *command-line-args*) -- The way it works: The line starting with :x is treated as a label by cmd.exe (and so, in effect, ignored). In Clojure, it's treated as a keyword :x followed by the start of a multiline comment - (comment So everything down to the closing ) is ignored by clojure, but executed by cmd.exe The next bits: @echo off - suppress cmd.exe's annoying habit of displaying everything java... Run the clojure script. %~f0 is the script name - I quote it in case it has spaces, and %* is the rest of the command line. Then, goto eof terminates the batch file (goto end of file), ignoring the rest of the file, which can therefore be arbitrary clojure. Paul. -- 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
Lazy map implementation
I need a lazy map in my compojure based application to inject data into handlers. I searched the web for an implementation, I got one from Meikel which was written in 2008. Is there any recommendation? Thanks. -- 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: Datatype Usage Examples
On May 28, 9:52 am, SinDoc s...@khakbaz.com wrote:
L.S.,
I was wondering if someone could point me to recent usage examples of
deftype, defrecord, and reify. Reading [1] helped a lot but it wasn't
particularly easy to find it since it's not linked from the sidebar.
I've used protocols and defrecords to implement Michael Nygaard's
Circuit-breaker pattern.
The circuit breaker is basically a state-machine, with transitions
that occur on various events.
To me, it was very natural to model the transition functions as a
protocol
(defprotocol CircuitBreakerTransitions
Transition functions for circuit-breaker states
(proceed [s] true if breaker should proceed with call in this
state)
(on-success [s] transition from s to this state after a successful
call)
(on-error [s] transition from s to this state after an unsuccessful
call)
(on-before-call [s] transition from s to this state before a
call))
The states are then datatypes (records in this case) that are extended
to reach this protocol, e.g.,
(defrecord ClosedState [#^TransitionPolicy policy #^int fail-count])
...
(extend ClosedState CircuitBreakerTransitions ...)
Blog: http://blog.higher-order.net/2010/05/05/circuitbreaker-clojure-1-2/
Code: http://github.com/krukow/clojure-circuit-breaker
Specifically, what I'd like to know is:
- How to define and access member data fields -also mutable in case
of deftype- to my ADTs.
The example is there for immutable fields. Why do you need mutability?
- Whether I can refer to type instances -an equivalent to the 'this'
keyword in Java.
The first argument to a protocol function corresponds to the this
keyword in Java, e.g.,
(extend ClosedState CircuitBreakerTransitions
...
:on-success
(fn [{f :fail-count p :policy, :as s}] ;; note we can destructure
the 'this' argument (s)
(if (zero? f) s (ClosedState. p 0)))
...)
- How to define constructors.
A single constructor is automatically defined for you. In my case with
two params:
(ClosedState. policy fail-count)
If you need more flexibility, I believe you need gen-class, but I am
unsure.
Kind regards,
SinDoc
[1]http://clojure.org/datatypes
Hope that helps. Kind Regards,
- Karl
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Re: Lazy map implementation
Can memoize do the job for you? On May 28, 10:39 am, Robert Luo robort...@gmail.com wrote: I need a lazy map in my compojure based application to inject data into handlers. I searched the web for an implementation, I got one from Meikel which was written in 2008. Is there any recommendation? Thanks. -- 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: Clojure script with shebangoid on windows
Hello Paul, thats much better, many thanks! Regards, alux On 28 Mai, 16:09, Paul Moore p.f.mo...@gmail.com wrote: On 28 May 2010 09:48, alux alu...@googlemail.com wrote: Hello! Short: It works, but is not perfect. (this may need an windows expert to make it better) Try this: --- myscript.bat --- :x (comment @echo off java -cp clojure.jar clojure.main %~f0 %* goto eof ) (println Hi! *command-line-args*) -- The way it works: The line starting with :x is treated as a label by cmd.exe (and so, in effect, ignored). In Clojure, it's treated as a keyword :x followed by the start of a multiline comment - (comment So everything down to the closing ) is ignored by clojure, but executed by cmd.exe The next bits: @echo off - suppress cmd.exe's annoying habit of displaying everything java... Run the clojure script. %~f0 is the script name - I quote it in case it has spaces, and %* is the rest of the command line. Then, goto eof terminates the batch file (goto end of file), ignoring the rest of the file, which can therefore be arbitrary clojure. Paul. -- 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: lein, slime, project management
I reply to myself. The answer is here: http://clojure.org/compilation http://clojure.org/compilationSorry 2010/5/28 Catonano caton...@gmail.com Hello people, so, my questions are not about Clojure, they're about the tools of the trade. I hope no one will be bothered. In my opinion the tools are a part of this. So, the swank-clojure-project is gonna be deprecated and I should settle on slime-connect instead. Fine. But being a beginner with both Emacs and Slime, I'd appreciate some insight about what the usage patterns are supposed to be. I mean, what is gonna happen when I ask slime to compile the contents of a buffer ? Is it gonna produce a .class file ? Or a jar ? Where is it gonna put it ? Are the contents of the file gonna be available from that time on ? Or should I add the thing to the dependencies ? Right now, I connected to my lein based swank server, then I defined a small hello world function in a file. From the SLIME menu I choose compile defun and it doesn't complain about anything. I choose compile file and an error pops up with a stacktrace (ugh) and the third line in the stacktrace says something like user$eval__1975.invoke(NO_SOURCE_FILE) So, I wonder: what's going on ? Thanks for ANY hint Catonano -- La difesa più sicura contro il male è l'estremo individualismo, l'originalità di pensiero, la stravaganza, perfino, se volete, l'eccentricità… Il male va matto per la solidarietà. Less than one di Joseph Brodsky -- La difesa più sicura contro il male è l'estremo individualismo, l'originalità di pensiero, la stravaganza, perfino, se volete, l'eccentricità… Il male va matto per la solidarietà. Less than one di Joseph Brodsky -- 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: Elegant way to replace a few words in string
I feel like the type hints should be left out until you really need
them, since they kind of clobber the routine's readability.
-John
On May 28, 9:07 am, Laurent PETIT laurent.pe...@gmail.com wrote:
(reduce
(fn [#^String s [#^CharSequence what #^CharSequence with]]
(.replace s what with))
Foo12 Bar130 Qoo20
{Foo XF Bar XB Qoo XQ})
2010/5/28 Oleg oleg.richa...@gmail.com
Hello Guys!
I have a string for example Foo12 Bar130 Qoo20 and map like this
{Foo XF Bar XB Qoo XQ}.
I want get: XF12 XB130 XQ20
I want to replace words in string based on map association. What is
the elegant way to do it? Sure, i can use loop and recur
to make string enter the next replacement, but is there another way to
do it better?
Cheers, Oleg
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Re: Newbie question about vector performance
Hi again, I have tried a few more things: I have done the same in Java but using an array of Integers, instead of an array of ints. It just takes 78 ms. (more than 16, still far less than 4 secs). I have also tried with an update function which just returns a fixed 1. It still takes some 400 ms. to update de data vector of the CA. This is similar to the time it is giving me to create a vector of 1's with this function: (time (vec (repeat 25 1))). I was not expecting Clojure vectors so much slower than Java arrays. Is that comparison so "unfair"? Next thing I am trying is using Java Vectors in my Java implementation... Rubn Rubn Bjar escribi: Hi all, I am new to the list and to Clojure. I have been working in implementing some 2D cellular automata (CA) just to have a project to teach Clojure to myself. After some work I have something that works, but it is pretty slow. The function that takes a CA of 500x500 cells (integers) and returns an updated (*) copy takes 4 s. (using Clojure vectors), while doing more or less the same in Java (using arrays and primitive types) takes more or less 16 *ms.*. I expected some difference, but not that big. Before trying to use Java arrays and primitive types in Clojure, I would like to know how my Clojure approach can be improved (I am willing to sacrifice some performance to keep it "more Clojure", but not that much). As I do not want to post a bunch of horrible code full of comments and not properly indented, I have extracted what i hope are the main pieces, written some comments and posted it here: http://snipt.org/Okpk Pasting that code in a new file in Eclipse (I am using counterclockwise) and running it in the REPL prints this: Clojure 1.1.0-alpha-SNAPSHOT "Elapsed time: 4355.363706 msecs" "Elapsed time: 4416.98562 msecs" 1:1 user= #Namespace cellular-automata-basic 1:2 cellular-automata-basic= I would thank a lot any hint, suggestion, comment, or whatever... :-) Best regards, Rubn (*) The update consists on adding the values of the 8 neighbours of every cell and changing it if that sum is between two fixed numbers. -- Rubn BJAR HERNNDEZ Dpto. de Informtica e Ingeniera de Sistemas - Universidad de Zaragoza (Computing and Systems Engineering Department - Universidad de Zaragoza) c/ Mara de Luna 1, 50018 Zaragoza, Spain Tel: (+34) 976 76 2332 (Fax: 1914) e-mail: rbe...@unizar.es Grupo IA3 (IA3 Laboratory) - http://iaaa.cps.unizar.es -- 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 about vector performance
On May 28, 2010, at 8:47 AM, Rubén Béjar wrote: I would thank a lot any hint, suggestion, comment, or whatever... :-) As a style issue I'd suggest using inc, dec, neg?, pos?, and zero? instead of the various (+ x 1), ( x 0), etc. in your code. This actually seems to improve performance a bit on my laptop, but it's nothing amazing. To get good performance you're likely going to need to do some type hinting. http://clojure.org/java_interop#Java%20Interop-Type%20Hints -- 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: Elegant way of expressing this in Clojure?
Thanks Christophe. That looks relatively clean as well. (As clean as the Java version anyway). And it's the fastest version shown so far. -Patrick On May 28, 9:57 am, Christophe Grand christo...@cgrand.net wrote: On Fri, May 28, 2010 at 3:09 PM, CuppoJava patrickli_2...@hotmail.comwrote: d,w are arrays that are passed to me by a machine learning algorithm so it's not something that I have control over. There are roughly 100 words per doc. ok Thanks for everyone's help. I wonder if directly mutable primitives is something that is hard to put into Clojure? Or something that's explicitly avoided because it distracts from the FP paradigm. The lack of them is making this code somewhat awkward to write. In this case there is no need for mutable primitives. You can try a direct translation of your java code: (let [n (alength w)] (loop [doc (int -1) i (int 0)] (when ( i n) (let [new-doc (aget d i) (when-not (= doc new-doc) (load doc)) (when-not (malformed doc) (process new-doc (aget w i)) (recur new-doc (inc i))) You can tweeak it here and there (== and unchecked-inc for example) and don't forget to typehint d and w if Clojure doesn't infer their type. Christophe -- Brussels, 23-25/6http://conj-labs.eu/ Professional:http://cgrand.net/(fr) On Clojure:http://clj-me.cgrand.net/(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: Lazy map implementation
On 5月28日, 下午11时01分, Sean Devlin francoisdev...@gmail.com wrote: Can memoize do the job for you? No. What I need is something can act as a map to replace the request map in compojure/ring so that it can be used in any middleware/ handles. -- 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: Lazy map implementation
On May 28, 4:39 pm, Robert Luo robort...@gmail.com wrote: I need a lazy map in my compojure based application to inject data into handlers. I searched the web for an implementation, I got one from Meikel which was written in 2008. Is there any recommendation? Thanks. I don't really see what you're trying to do with this, but as an alternative, you can assoc lazy-seqs to a standard map. That is, if your values are going to be seqs (IME, most of the things you want lazy evaluation for are). Joost. -- 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 about vector performance
I can't see your code due to the IT policies here, but I can make some generalizations - these are assuming your code is correct and you're not accidentally using an exponential algorithm (which I wouldn't preclude, 4 minutes does sound truly excessively slow, even for vectors). Vectors are significantly slower than Java arrays due to their copy-on- write semantics. You have a few options, both of which are considered perfectly acceptable Clojure for high-performance numerical code: 1. Use transients (http://clojure.org/transients) when you update your vectors. This should give you a pretty significant speed increase. 2. Alternatively, use native java arrays. Clojure provides a complete set of functions for creating and mutating raw Java arrays 3. Use type hints to eliminate reflection at choke points in your processing. If you do 2 and 3, you should get pretty close to native Java speeds. On May 28, 12:20 pm, Rubén Béjar ruben.be...@gmail.com wrote: Hi again, I have tried a few more things: I have done the same in Java but using an array of Integers, instead of an array of ints. It just takes 78 ms. (more than 16, still far less than 4 secs). I have also tried with an update function which just returns a fixed 1. It still takes some 400 ms. to update de data vector of the CA. This is similar to the time it is giving me to create a vector of 1's with this function: (time (vec (repeat 25 1))). I was not expecting Clojure vectors so much slower than Java arrays. Is that comparison so unfair? Next thing I am trying is using Java Vectors in my Java implementation... Rubén Rubén Béjar escribió:Hi all, I am new to the list and to Clojure. I have been working in implementing some 2D cellular automata (CA) just to have a project to teach Clojure to myself. After some work I have something that works, but it is pretty slow. The function that takes a CA of 500x500 cells (integers) and returns an updated (*) copy takes 4 s. (using Clojure vectors), while doing more or less the same in Java (using arrays and primitive types) takes more or less 16 *ms.*. I expected some difference, but not that big. Before trying to use Java arrays and primitive types in Clojure, I would like to know how my Clojure approach can be improved (I am willing to sacrifice some performance to keep it more Clojure, but not that much). As I do not want to post a bunch of horrible code full of comments and not properly indented, I have extracted what i hope are the main pieces, written some comments and posted it here:http://snipt.org/Okpk Pasting that code in a new file in Eclipse (I am using counterclockwise) and running it in the REPL prints this: Clojure 1.1.0-alpha-SNAPSHOT Elapsed time: 4355.363706 msecs Elapsed time: 4416.98562 msecs 1:1 user= #Namespace cellular-automata-basic 1:2 cellular-automata-basic= I would thank a lot any hint, suggestion, comment, or whatever... :-) Best regards, Rubén (*) The update consists on adding the values of the 8 neighbours of every cell and changing it if that sum is between two fixed numbers.-- Rubén BÉJAR HERNÁNDEZ Dpto. de Informática e Ingeniería de Sistemas - Universidad de Zaragoza (Computing and Systems Engineering Department - Universidad de Zaragoza) c/ María de Luna 1, 50018 Zaragoza, Spain Tel: (+34) 976 76 2332 (Fax: 1914) e-mail:rbe...@unizar.esgrupo IA3 (IA3 Laboratory) -http://iaaa.cps.unizar.es On May 28, 12:20 pm, Rubén Béjar ruben.be...@gmail.com wrote: Hi again, I have tried a few more things: I have done the same in Java but using an array of Integers, instead of an array of ints. It just takes 78 ms. (more than 16, still far less than 4 secs). I have also tried with an update function which just returns a fixed 1. It still takes some 400 ms. to update de data vector of the CA. This is similar to the time it is giving me to create a vector of 1's with this function: (time (vec (repeat 25 1))). I was not expecting Clojure vectors so much slower than Java arrays. Is that comparison so unfair? Next thing I am trying is using Java Vectors in my Java implementation... Rubén Rubén Béjar escribió:Hi all, I am new to the list and to Clojure. I have been working in implementing some 2D cellular automata (CA) just to have a project to teach Clojure to myself. After some work I have something that works, but it is pretty slow. The function that takes a CA of 500x500 cells (integers) and returns an updated (*) copy takes 4 s. (using Clojure vectors), while doing more or less the same in Java (using arrays and primitive types) takes more or less 16 *ms.*. I expected some difference, but not that big. Before trying to use Java arrays and primitive types in Clojure, I would like to know how my Clojure approach can be improved (I am willing to sacrifice some performance to keep it more Clojure, but not that much). As I do not want to post a bunch of horrible code full of comments and not
Re: Elegant way to replace a few words in string
The rule should really always be: no warning at all (with
*warn-on-reflection* set to true, of course).
And in this case, I did what is necessary to avoid reflection warnings. Try
it yourself.
2010/5/28 John Cromartie jcromar...@gmail.com
I feel like the type hints should be left out until you really need
them, since they kind of clobber the routine's readability.
-John
On May 28, 9:07 am, Laurent PETIT laurent.pe...@gmail.com wrote:
(reduce
(fn [#^String s [#^CharSequence what #^CharSequence with]]
(.replace s what with))
Foo12 Bar130 Qoo20
{Foo XF Bar XB Qoo XQ})
2010/5/28 Oleg oleg.richa...@gmail.com
Hello Guys!
I have a string for example Foo12 Bar130 Qoo20 and map like this
{Foo XF Bar XB Qoo XQ}.
I want get: XF12 XB130 XQ20
I want to replace words in string based on map association. What is
the elegant way to do it? Sure, i can use loop and recur
to make string enter the next replacement, but is there another way to
do it better?
Cheers, Oleg
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Re: Elegant way to replace a few words in string
On May 28, 2010, at 12:42 PM, Laurent PETIT wrote: The rule should really always be: no warning at all (with *warn-on-reflection* set to true, of course). I strongly disagree. Why should you care about those sorts of warnings unless you've already identified a bottleneck that needs elimination? IMO the rule should be: write it the simplest way you can first, then optimize only what your benchmarks tell you needs optimizing. -- 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: 57 varieties
On 28 May 2010, at 11:39, Philip Hudson wrote: I've been trying for the best part of a month to get SLIME/SWANK/Clojure/clojure-mode working in emacs 23.2 on Mac OS X 10.5 without using ELPA, which unfortunately seems to break everything including itself in my setup. If it helps, I've got a working non-ELPA set-up which you can browse here: http://github.com/purcell/emacs.d It uses git versions of Slime, Clojure-mode and Swank-clojure (as git submodules). Feel free to mail me off-list with any questions. -Steve -- 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: Lazy map implementation
Hi, On Fri, May 28, 2010 at 07:39:55AM -0700, Robert Luo wrote: I need a lazy map in my compojure based application to inject data into handlers. I searched the web for an implementation, I got one from Meikel which was written in 2008. Is there any recommendation? Just FYI: It's still maintained and will soon move to deftype to be ready for 1.2. Then I will also put a release on Clojars. Sincerely Meikel -- 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: Elegant way to replace a few words in string
2010/5/28 Michael Gardner gardne...@gmail.com On May 28, 2010, at 12:42 PM, Laurent PETIT wrote: The rule should really always be: no warning at all (with *warn-on-reflection* set to true, of course). I strongly disagree. Why should you care about those sorts of warnings unless you've already identified a bottleneck that needs elimination? Because in this world of non typed vars and highly generic code, I tend to consider compiler warnings being of similar importance to compiler errors in statically typed languages. With the additional benefit that since they are warnings, they don't get in your way while you're experimenting and shaping your project's code. But one should consider with care, when commiting code, letting the warnings accumulate out of control to the point you're not able to spot the apparition of new ones. IMO the rule should be: write it the simplest way you can first, then optimize only what your benchmarks tell you needs optimizing. Reflection warnings not only reflect potential optimization problems, but also potential bugs, like for the reflection warnings I added in the above example: the String.replace() function is highly overloaded in such a way that if you pass 2 String to it, one function will be taken, but if you explicitly cast the Strings to CharSequences, another implementation (not considering the first string to be a regexp) is taken. -- 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: Elegant way to replace a few words in string
2010/5/28 Michael Gardner gardne...@gmail.com On May 28, 2010, at 12:42 PM, Laurent PETIT wrote: The rule should really always be: no warning at all (with *warn-on-reflection* set to true, of course). I strongly disagree. Why should you care about those sorts of warnings unless you've already identified a bottleneck that needs elimination? Said differently than my previous answer : consider removing warnings as the act of keeping your code in a good state/shape. I tend to not get rid of warnings enough in my own java code, but for clojure production code, I would take warnings wayy more seriously than e.g. java warnings. My 0,02€, -- Laurent -- 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: Datatype Usage Examples
Hi Meikel, Meikel Brandmeyer wrote: SinDoc wrote: I was wondering if someone could point me to recent usage examples of deftype, defrecord, and reify. Reading [1] helped a lot but it wasn't particularly easy to find it since it's not linked from the sidebar. Specifically, what I'd like to know is: - How to define and access member data fields -also mutable in case of deftype- to my ADTs. - Whether I can refer to type instances -an equivalent to the 'this' keyword in Java. - How to define constructors. The modified memoize sparked some examples for this: http://kotka.de/blog/2010/03/memoize_done_right.html#protocols Thank you for the link, Meikel. It's very well-written. Kind regards, SinDoc -- 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: Datatype Usage Examples
Hi Krukow,
Krukow wrote:
SinDoc wrote:
I was wondering if someone could point me to recent usage examples of
deftype, defrecord, and reify. Reading [1] helped a lot but it wasn't
particularly easy to find it since it's not linked from the sidebar.
Blog: http://blog.higher-order.net/2010/05/05/circuitbreaker-clojure-1-2/
Code: http://github.com/krukow/clojure-circuit-breaker
This is a good example. I like the way merge is used to avoid redundancy while
dispatching methods. Deftype is not being used in the example but if I want the
map, I should go for defrecord anyway.
The only member data _I'm_ able find are the ones that are passed to the
default constructor, namely at the time that the abstraction is reified. What
if I'd have to give create a member field that is not necessarily known by the
caller or instantiator. That is, it's the abstraction itself that has to create
and maintain the value of that field.
One of the abstraction that I was hoping to implement in Clojure is a
Scheme-like pair in order to demonstrate various memory management techniques.
Once we do (cons a b), an abstract pair should be made that only contains a
pointer to its location in memory: (tag address). Here's the pair
implementation [2] in Scheme R5RS.
I'm thinking optional parameters could be used. Since callers don't have to
provide values for them, I can use them to maintain the state for each
instance. I might be missing the obvious here since these are data types and
there should be an explicit way to say that this _thing_ is my data.
Specifically, what I'd like to know is:
- How to define and access member data fields -also mutable in case
of deftype- to my ADTs.
The example is there for immutable fields. Why do you need mutability?
I don't need it. Just wanted to see some examples. I'd rather go immutable
anyway ;)
- Whether I can refer to type instances -an equivalent to the 'this'
keyword in Java.
The first argument to a protocol function corresponds to the this
keyword in Java, e.g.,
(extend ClosedState CircuitBreakerTransitions
...
:on-success
(fn [{f :fail-count p :policy, :as s}] ;; note we can destructure
the 'this' argument (s)
(if (zero? f) s (ClosedState. p 0)))
...)
Nice!
- How to define constructors.
A single constructor is automatically defined for you. In my case with
two params:
(ClosedState. policy fail-count)
If you need more flexibility, I believe you need gen-class, but I am
unsure.
I can live with one constructor for now.
[1]http://clojure.org/datatypes
[2] http://is.gd/ctoSg
Hope that helps. Kind Regards,
Thank you very much, Krukow. It sure did help.
Kind regards,
SinDoc
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Re: do clojure and la(tex) have something in common ?
Hi Mike, On May 25, 9:04 am, Mike Meyer mwm-keyword-googlegroups. 620...@mired.org wrote: I find the reference to old fashioned xslt amusing, considering that how new it is. Or maybe how old I am. Of course, part of the point of XML is that you have a wide variety of tools to pick from for working with it; xslt is just one of them. I've had good experiences just adding an xpath library to a good language. A clojure xpath library that returned result sets as lazy sequences sounds like a really cool way to do this, though that would again be just a single component in such a system. Re: a clojure XPath/XQuery library that returns a lazy seq of the results, check out my wrapper of Michael Kay's Saxon library: http://github.com/pjt/saxon Saxon computes XPath results mostly lazily, I retain this laziness in my wrapper. (I say somewhat because Saxon stays one result element ahead of realization.) Best, Perry -- 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: Anyone experienced in using clojure as a database
I haven't had a chance to play with your code yet but at first glance it looks good. Does the above mean that all set operations are automatically supported and the accelerated? Unfortunately not for all operations. For example, clojure.set/join uses its own index function, which builds an index for every join invokation. On the other hand, difference, union and intersection use the primary-key index (through .equals), which may be a bit faster than hashing whole tuples. Do you think it is possible to implement join/union etc so that they produce lazy relations (or just lazy-seq of rows)? That would be very useful in many common use cases (instead of cursors). I tried it once, but I was too ambigious. Providing lazy relations and hiding the implementation details (SQL or clojure) while wrapping it in a relational algebra API just didn't work out to be practical :). Maybe that snippet is a good foundation to start a more humble approach. But with clojure you get already a general-purpose, lazy select and project operations (filter and map). Adding lazy joins and set-operations isn't that hard. Making them efficient beyond basic index usage is harder. As for the storage persistence - that's a low priority (at least for me), but it would be good to have at least some method for tying a relation to such storage (like a tie function in Perl). Can you tell me more about these hooks to Clojure STM and Cells? Currently, there are no Hooks, and Cells are just an idea: http://www.assembla.com/wiki/show/clojure/Cells http://groups.google.com/group/clojure/browse_thread/thread/aa22a709501a64ac Erik -- 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: Clojure script with shebangoid on windows
On 28 May 2010 16:17, alux alu...@googlemail.com wrote: Hello Paul, thats much better, many thanks! I've added it to the Wikibooks page, http://en.wikibooks.org/wiki/Clojure_Programming/Tutorials_and_Tips#Shebang_Scripting_in_Clojure Paul. -- 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: Datatype Usage Examples
On May 28, 9:59 pm, Sina K. Heshmati s...@khakbaz.com wrote: Hi Krukow, [snip] The only member data _I'm_ able find are the ones that are passed to the default constructor, namely at the time that the abstraction is reified. What if I'd have to give create a member field that is not necessarily known by the caller or instantiator. That is, it's the abstraction itself that has to create and maintain the value of that field. You mean something like a private field in Java that is not supplied as a constructor argument, but computed as a function of the other fields, and which is not necessarily accessible from callers. If I understand correctly what it is you want, I think you are moving away from Clojure, trying to somehow encapsulate an object. See RH's note on encapsulation: Encapsulation of information is folly. Fields are public. Use protocols/interfaces to avoid dependencies [1]. Again, I believe that you can use gen-class if you really need to do this. One of the abstraction that I was hoping to implement in Clojure is a Scheme-like pair in order to demonstrate various memory management techniques. Once we do (cons a b), an abstract pair should be made that only contains a pointer to its location in memory: (tag address). Here's the pair implementation [2] in Scheme R5RS. So you want a mutable pair (fst, snd) where fst and snd can be mutated arbitrarily? This is definately not the Clojure way :) In Clojure, you'd either use a pair of atoms or refs, giving you managed mutability, or you'd simply write a functional pair. [snip] Thank you very much, Krukow. It sure did help. Kind regards, SinDoc Glad it did :) -- 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: API in Clojure for Java folklore
I've also added a :class-doc key to the macro -
(gen-class+javadoc
:class-doc Class Docs
ul li One /li li Two /li /ul
:name a.b.c.MyCoolClass
:methods [
#^{:static true} [method1
[clojure.lang.PersistentArrayMap] int]
#^{:static true} [method2 [int int float]
clojure.lang.LazySeq]
#^{:static true} [method3 [] Object]
])
Thanks
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Re: Some suggestions for transients
Oops didn't know that Rich had already answered. Google seems to think that our posts are commutative :/ (often they're not, or are they? I can't take a stand on this) and just uses the commute fn instead of using alter and failing the transaction (informing us); but it does allow for more concurrency as Rich mentions in the docs of commute :P. -- 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: Clojure Master on android
Worked around the issue by removing some unnecessary stuff from the clojure build.xml, thus making the final clojure.jar smaller. (In particular the dx program would halt on generating code for zip $remove). On May 28, 2:59 pm, Remco van 't Veer rwvtv...@gmail.com wrote: Hmm, I have a 32 bit setup to that's probably the issue: java version 1.6.0_18 OpenJDK Runtime Environment (IcedTea6 1.8) (6b18-1.8-0ubuntu1) OpenJDK Server VM (build 14.0-b16, mixed mode) Don't have a clue how to fix this. On 2010/05/28 11:06, MHOOO wrote: On May 28, 9:26 am, Remco van 't Veer rwvtv...@gmail.com wrote: Try giving the dx command a bit more memory by adding something like: -Jmx1024m before --dex. Unfortunately that didn't work quite so well. The java process ended up using 1.4GB ram without terminating (waited approximately 10 minutes before I killed it). I am using: --- tho...@lisper:/$ java -version java version 1.6.0_18 OpenJDK Runtime Environment (IcedTea6 1.8) (6b18-1.8-0ubuntu1) OpenJDK 64-Bit Server VM (build 14.0-b16, mixed mode) tho...@lisper:/$ uname -a Linux lisper 2.6.32-22-generic #33-Ubuntu SMP Wed Apr 28 13:28:05 UTC 2010 x86_64 GNU/Linux tho...@lisper:/$ cat /etc/*-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=10.04 DISTRIB_CODENAME=lucid DISTRIB_DESCRIPTION=Ubuntu 10.04 LTS -- The script I am using (hello-dalvik.sh): -- #!/bin/sh export ANDROID_DIR=/home/thomas/sources/android-sdk-linux_86 export CLOJURE_JAR=/home/thomas/sources/clojure/clojure.jar set -e rm -rf hello-dalvik; mkdir hello-dalvik; cd hello-dalvik echo '(ns HelloDalvik (:gen-class)) (defn -main [] (println (str hello dalvik from clojure (clojure-version' HelloDalvik.clj java -classpath $CLOJURE_JAR:. -Dclojure.compile.path=. clojure.lang.Compile HelloDalvik $ANDROID_DIR/platforms/android-8/tools/dx -Jmx1024m --dex -- output=classes.dex HelloDalvik*.class $CLOJURE_JAR $ANDROID_DIR/platforms/android-8/tools/aapt add HelloDalvik.jar classes.dex jar uf HelloDalvik.jar -C ../src/clj clojure/version.properties $ANDROID_DIR/tools/adb push HelloDalvik.jar /sdcard/ echo dalvikvm -classpath /sdcard/HelloDalvik.jar HelloDalvik \; exit | $ANDROID_DIR/tools/adb shell - Anything wrong with my configuration? -- 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: Android 'dex' stage takes a very long time with Clojure
I've just started with development on android myself, but from what I've read on the internets, you could probably write a .dex loader in the default classes.dex (which will be loaded when you start your application) and write your actual program in other .dex files. This way you'll be able to compile the entire clojure system into the classes.dex and will only have to update your custom .dex files. This is actually something I'm currently trying to get to work. For further info, see: http://code.google.com/p/android/issues/detail?id=7147 http://developer.android.com/reference/dalvik/system/DexClassLoader.html On May 28, 4:12 pm, Matt Clark matt.clar...@gmail.com wrote: I'm new to Android, but I've been wanting to give it a try for a while so I thought I'd try using Clojure's master branch. It all seems to be working fairly well except the dex stage of installation takes around 2 minutes for a simple Hello World app. How do others get around this lag? I'm pretty sure it's caused by the large clojure.core namespace, as I've already taken everything else that I can out of the clojure jar file. I'm just not sure if there's anything else I can do. I am using emacs and android-mode, if that is of any help. I've also tried giving it more memory as suggested here:http://groups.google.com/group/clojure/msg/c38e015582cf7623 Thanks a lot Matt -- 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: Lazy map implementation
Just FYI: It's still maintained and will soon move to deftype to be ready for 1.2. Then I will also put a release on Clojars. Sincerely Meikel Thanks Meikel, I will try your implementation in my application. -- 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: Lazy map implementation
On 5月29日, 上午12时50分, Joost jo...@zeekat.nl wrote: I don't really see what you're trying to do with this, but as an alternative, you can assoc lazy-seqs to a standard map. That is, if your values are going to be seqs (IME, most of the things you want lazy evaluation for are). Joost. The reason is very simple: Existing code base (ring) choose map as the data structure, I want my new feature seamless merge into it, then I can use all the existing functions, and new codes become normal citizen in the design. The reason I ask is that I think this is so common a need, and its idea fits into clojure's philosophy. I do not want to reinvent wheels on a common need. -- 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
(apply interleave [[1 2]])
When I do (apply interleave some-colls) and some-colls is a sequence/collection of only one sequence/ collection, it will throw: user= (apply interleave [[1 2]]) java.lang.IllegalArgumentException: Wrong number of args passed to: core$interleave (NO_SOURCE_FILE:0) (Of course I don't need the apply to cause that exception, but calling interleave directly with just one parameter doesn't make any sense. But in the case you use apply, having only one sequence in a sequence is a possible corner case that can arise at run time) In order to make interleave more general, I'd like to add a one param overload to interleave like (defn interleave Returns a lazy seq of the first item in each coll, then the second etc. ([c] (seq c)) ... or even just (defn interleave ([c] c) but that would break the contract of interleave, in that it returns whatever you pass in, which might not be a sequence, as is the case in my example. Any thoughts on this? Eugen -- 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: Any issues with launching in clojure, calling Java code, Java code calling clojure
So a lot of Clojure variables are set at the JVM/Class level Hmm... On May 27, 10:29 pm, Jason Smith ja...@lilypepper.com wrote: The issue that you'll run into is that there is one lexical scope that is shared by all calls toClojure. The only ways around this are (1) run it in another process, and (2) load theClojureJARs into a ClassLoader at runtime, and throw the ClassLoader away after every call. The overhead for option 2 is between 0.5 and 1 second per call, becauseClojurehas to be re-inited. For option 1, it's even more because you are starting Java, then initing Java. Threads have nothing to do with theClojurelexical scoping. If you run 100 threads, they normally all share the same variables, namespaces, and functions. For more info, you can check outhttp://sandflea.googlecode.com/svn/site/maven-clojure-plugin/1.1.0/cl... (http://code.google.com/p/sandflea/source/browse/maven-clojure-plugin/ trunk/clojure-commons/src/main/java/sandflea/clojure/scripting/ ClojureScripting.java). On May 27, 3:46 pm, BerlinBrown berlin.br...@gmail.com wrote: I enjoyclojureand I think I am breaking all the rules. I have an app that I originally created inclojure. It has been a year off and on. And I merged that code with some existing java database code. Theclojurecode invokes the java code. Now, I want to have a script environment where users can invoke their ownclojurecode. But I was think theclojurecode should run in a completely new, separate environment, via a thread. Basically. 1.Clojureis invokved (clojure.main) 2. I haveclojurecode that invokes code originally written in Java 3. That java code creates another separateclojureinstance, parsing a clojurescript. (an embedded dsl) It isn't that confusing. It is almost akin to invoking a JSP page from a running web server. -- 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: Any issues with launching in clojure, calling Java code, Java code calling clojure
I don't think option 2 would take that long. Even my clojure startup is not half a second on a modern machine. On May 27, 10:29 pm, Jason Smith ja...@lilypepper.com wrote: The issue that you'll run into is that there is one lexical scope that is shared by all calls toClojure. The only ways around this are (1) run it in another process, and (2) load theClojureJARs into a ClassLoader at runtime, and throw the ClassLoader away after every call. The overhead for option 2 is between 0.5 and 1 second per call, becauseClojurehas to be re-inited. For option 1, it's even more because you are starting Java, then initing Java. Threads have nothing to do with theClojurelexical scoping. If you run 100 threads, they normally all share the same variables, namespaces, and functions. For more info, you can check outhttp://sandflea.googlecode.com/svn/site/maven-clojure-plugin/1.1.0/cl... (http://code.google.com/p/sandflea/source/browse/maven-clojure-plugin/ trunk/clojure-commons/src/main/java/sandflea/clojure/scripting/ ClojureScripting.java). On May 27, 3:46 pm, BerlinBrown berlin.br...@gmail.com wrote: I enjoyclojureand I think I am breaking all the rules. I have an app that I originally created inclojure. It has been a year off and on. And I merged that code with some existing java database code. Theclojurecode invokes the java code. Now, I want to have a script environment where users can invoke their ownclojurecode. But I was think theclojurecode should run in a completely new, separate environment, via a thread. Basically. 1.Clojureis invokved (clojure.main) 2. I haveclojurecode that invokes code originally written in Java 3. That java code creates another separateclojureinstance, parsing a clojurescript. (an embedded dsl) It isn't that confusing. It is almost akin to invoking a JSP page from a running web server. -- 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
Android activity fails because of dependency on java.beans.Introspector
I've just now tried to get an android activity to run, however when
executing the application (hello world, really) I get the following
error:
I/ActivityManager( 59): Starting activity: Intent
{ act=android.intent.action.MAIN
cat=[android.intent.category.LAUNCHER] flg=0x1020
cmp=tk.clojure/.core }
I/ActivityManager( 59): Start proc tk.clojure for activity
tk.clojure/.core: pid=307 uid=10031 gids={1015}
I/global ( 307): Default buffer size used in BufferedReader
constructor. It would be better to be explicit if an 8k-char buffer is
required.
D/dalvikvm( 307): GC_FOR_MALLOC freed 5960 objects / 281936 bytes in
86ms
D/dalvikvm( 307): GC_FOR_MALLOC freed 8151 objects / 362960 bytes in
72ms
D/dalvikvm( 307): GC_FOR_MALLOC freed 8754 objects / 393960 bytes in
73ms
I/dalvikvm( 307): Could not find method
java.beans.Introspector.getBeanInfo, referenced from method
clojure.core$bean.invoke
W/dalvikvm( 307): VFY: unable to resolve static method 15023: Ljava/
beans/Introspector;.getBeanInfo (Ljava/lang/Class;)Ljava/beans/
BeanInfo;
D/dalvikvm( 307): VFY: replacing opcode 0x71 at 0x0044
D/dalvikvm( 307): VFY: dead code 0x0047-012c in Lclojure/core
$bean;.invoke (Ljava/lang/Object;)Ljava/lang/Object;
D/dalvikvm( 307): GC_FOR_MALLOC freed 9136 objects / 387744 bytes in
74ms
D/dalvikvm( 307): GC_FOR_MALLOC freed 11975 objects / 465912 bytes in
84ms
D/dalvikvm( 307): GC_FOR_MALLOC freed 11467 objects / 506384 bytes in
81ms
D/dalvikvm( 307): GC_FOR_MALLOC freed 12562 objects / 507344 bytes in
87ms
W/dalvikvm( 307): Exception Ljava/lang/NullPointerException; thrown
during Lclojure/core__init;.clinit
W/dalvikvm( 307): Exception Ljava/lang/ExceptionInInitializerError;
thrown during Lclojure/lang/RT;.clinit
W/dalvikvm( 307): Exception Ljava/lang/ExceptionInInitializerError;
thrown during Ltk/clojure/core;.clinit
W/dalvikvm( 307): Class init failed in newInstance call (Ltk/clojure/
core;)
D/AndroidRuntime( 307): Shutting down VM
W/dalvikvm( 307): threadid=1: thread exiting with uncaught exception
(group=0x4001d800)
E/AndroidRuntime( 307): FATAL EXCEPTION: main
E/AndroidRuntime( 307): java.lang.ExceptionInInitializerError
E/AndroidRuntime( 307):at
java.lang.Class.newInstanceImpl(Native Method)
E/AndroidRuntime( 307):at
java.lang.Class.newInstance(Class.java:1429)
E/AndroidRuntime( 307):at
android.app.Instrumentation.newActivity(Instrumentation.java:1021)
E/AndroidRuntime( 307):at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2577)
E/AndroidRuntime( 307):at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:
2679)
E/AndroidRuntime( 307):at android.app.ActivityThread.access
$2300(ActivityThread.java:125)
E/AndroidRuntime( 307):at android.app.ActivityThread
$H.handleMessage(ActivityThread.java:2033)
E/AndroidRuntime( 307):at
android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 307):at android.os.Looper.loop(Looper.java:
123)
E/AndroidRuntime( 307):at
android.app.ActivityThread.main(ActivityThread.java:4627)
E/AndroidRuntime( 307):at
java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 307):at
java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime( 307):at com.android.internal.os.ZygoteInit
$MethodAndArgsCaller.run(ZygoteInit.java:868)
E/AndroidRuntime( 307):at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
E/AndroidRuntime( 307):at
dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime( 307): Caused by:
java.lang.ExceptionInInitializerError
E/AndroidRuntime( 307):at
clojure.lang.Namespace.init(Namespace.java:34)
E/AndroidRuntime( 307):at
clojure.lang.Namespace.findOrCreate(Namespace.java:173)
E/AndroidRuntime( 307):at
clojure.lang.Var.internPrivate(Var.java:94)
E/AndroidRuntime( 307):at tk.clojure.core.clinit(Unknown
Source)
E/AndroidRuntime( 307):... 15 more
E/AndroidRuntime( 307): Caused by:
java.lang.ExceptionInInitializerError
E/AndroidRuntime( 307):at java.lang.Class.classForName(Native
Method)
E/AndroidRuntime( 307):at java.lang.Class.forName(Class.java:
235)
E/AndroidRuntime( 307):at
clojure.lang.RT.loadClassForName(RT.java:1569)
E/AndroidRuntime( 307):at clojure.lang.RT.load(RT.java:398)
E/AndroidRuntime( 307):at clojure.lang.RT.load(RT.java:380)
E/AndroidRuntime( 307):at clojure.lang.RT.doInit(RT.java:415)
E/AndroidRuntime( 307):at clojure.lang.RT.clinit(RT.java:
301)
E/AndroidRuntime( 307):... 19 more
E/AndroidRuntime( 307): Caused by: java.lang.NullPointerException
E/AndroidRuntime( 307):at
java.util.Properties.load(Properties.java:290)
E/AndroidRuntime( 307):at clojure.core
$fn__5418.invoke(core.clj:5444)
E/AndroidRuntime( 307):
Re: Android activity fails because of dependency on java.beans.Introspector
Doing some digging I found the problem:
I forgot to include the clojure/version.properties file in my .apk.
On May 29, 4:02 am, MHOOO thomas.karol...@googlemail.com wrote:
I've just now tried to get an android activity to run, however when
executing the application (hello world, really) I get the following
error:
I/ActivityManager( 59): Starting activity: Intent
{ act=android.intent.action.MAIN
cat=[android.intent.category.LAUNCHER] flg=0x1020
cmp=tk.clojure/.core }
I/ActivityManager( 59): Start proc tk.clojure for activity
tk.clojure/.core: pid=307 uid=10031 gids={1015}
I/global ( 307): Default buffer size used in BufferedReader
constructor. It would be better to be explicit if an 8k-char buffer is
required.
D/dalvikvm( 307): GC_FOR_MALLOC freed 5960 objects / 281936 bytes in
86ms
D/dalvikvm( 307): GC_FOR_MALLOC freed 8151 objects / 362960 bytes in
72ms
D/dalvikvm( 307): GC_FOR_MALLOC freed 8754 objects / 393960 bytes in
73ms
I/dalvikvm( 307): Could not find method
java.beans.Introspector.getBeanInfo, referenced from method
clojure.core$bean.invoke
W/dalvikvm( 307): VFY: unable to resolve static method 15023: Ljava/
beans/Introspector;.getBeanInfo (Ljava/lang/Class;)Ljava/beans/
BeanInfo;
D/dalvikvm( 307): VFY: replacing opcode 0x71 at 0x0044
D/dalvikvm( 307): VFY: dead code 0x0047-012c in Lclojure/core
$bean;.invoke (Ljava/lang/Object;)Ljava/lang/Object;
D/dalvikvm( 307): GC_FOR_MALLOC freed 9136 objects / 387744 bytes in
74ms
D/dalvikvm( 307): GC_FOR_MALLOC freed 11975 objects / 465912 bytes in
84ms
D/dalvikvm( 307): GC_FOR_MALLOC freed 11467 objects / 506384 bytes in
81ms
D/dalvikvm( 307): GC_FOR_MALLOC freed 12562 objects / 507344 bytes in
87ms
W/dalvikvm( 307): Exception Ljava/lang/NullPointerException; thrown
during Lclojure/core__init;.clinit
W/dalvikvm( 307): Exception Ljava/lang/ExceptionInInitializerError;
thrown during Lclojure/lang/RT;.clinit
W/dalvikvm( 307): Exception Ljava/lang/ExceptionInInitializerError;
thrown during Ltk/clojure/core;.clinit
W/dalvikvm( 307): Class init failed in newInstance call (Ltk/clojure/
core;)
D/AndroidRuntime( 307): Shutting down VM
W/dalvikvm( 307): threadid=1: thread exiting with uncaught exception
(group=0x4001d800)
E/AndroidRuntime( 307): FATAL EXCEPTION: main
E/AndroidRuntime( 307): java.lang.ExceptionInInitializerError
E/AndroidRuntime( 307): at
java.lang.Class.newInstanceImpl(Native Method)
E/AndroidRuntime( 307): at
java.lang.Class.newInstance(Class.java:1429)
E/AndroidRuntime( 307): at
android.app.Instrumentation.newActivity(Instrumentation.java:1021)
E/AndroidRuntime( 307): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2577)
E/AndroidRuntime( 307): at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:
2679)
E/AndroidRuntime( 307): at android.app.ActivityThread.access
$2300(ActivityThread.java:125)
E/AndroidRuntime( 307): at android.app.ActivityThread
$H.handleMessage(ActivityThread.java:2033)
E/AndroidRuntime( 307): at
android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 307): at android.os.Looper.loop(Looper.java:
123)
E/AndroidRuntime( 307): at
android.app.ActivityThread.main(ActivityThread.java:4627)
E/AndroidRuntime( 307): at
java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 307): at
java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime( 307): at com.android.internal.os.ZygoteInit
$MethodAndArgsCaller.run(ZygoteInit.java:868)
E/AndroidRuntime( 307): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
E/AndroidRuntime( 307): at
dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime( 307): Caused by:
java.lang.ExceptionInInitializerError
E/AndroidRuntime( 307): at
clojure.lang.Namespace.init(Namespace.java:34)
E/AndroidRuntime( 307): at
clojure.lang.Namespace.findOrCreate(Namespace.java:173)
E/AndroidRuntime( 307): at
clojure.lang.Var.internPrivate(Var.java:94)
E/AndroidRuntime( 307): at tk.clojure.core.clinit(Unknown
Source)
E/AndroidRuntime( 307): ... 15 more
E/AndroidRuntime( 307): Caused by:
java.lang.ExceptionInInitializerError
E/AndroidRuntime( 307): at java.lang.Class.classForName(Native
Method)
E/AndroidRuntime( 307): at java.lang.Class.forName(Class.java:
235)
E/AndroidRuntime( 307): at
clojure.lang.RT.loadClassForName(RT.java:1569)
E/AndroidRuntime( 307): at clojure.lang.RT.load(RT.java:398)
E/AndroidRuntime( 307): at clojure.lang.RT.load(RT.java:380)
E/AndroidRuntime( 307): at clojure.lang.RT.doInit(RT.java:415)
E/AndroidRuntime( 307): at clojure.lang.RT.clinit(RT.java:
301)
E/AndroidRuntime(
Re: Running Clojure scripts in Maven
Yeah, I might still eventually move it over. I decided to keep it separate for several reasons: * I need to work out some classloader issues that might affect other mojos in the same plugin. Clojure maintains lexical scope for everything run in the same classloader, and I think this can bleed between mojos. * I might want to add a report mojo to the execute mojo, that would let you more easily generate in-line reports. Something I've been thinking about, but I won't touch until I understand the changes to this feature in Maven 3. * Putting it into another project means being beholden to that project's release schedule. I've already integrated and released several enhancements and a couple of bug fixes, and am on the third release. It's nice being able to drop code when it's ready. * I wanted to write documentation with Maven site docs. The clojure- maven-plugin doesn't have that at this time (or at least it isn't apparent that it does). Maven site allows me to have documentation that lives with each tag and branch, so you can always see the docs for the version you are using. This will matter more when Clojure is 10 years old. :-) * I still want to experiment with stub generation and integrating Clojure documentation into Maven site, which is a whole other research project. Oh, yeah, and I'm on Windows. So it's kind of painful to work with the GIT tools. I think the GIT client implementation for Windows needs another year to become usable. So yeah, I decided to go down the path less traveled, just because this isn't anywhere near finished (although I think the *execute* mojo is looking stable), and it's more cumbersome to work in a larger project. When the feature set is solid and stable and I know it won't interfere with other software, maybe then it's time to move the code. Besides - this is Maven. It's just another (plugin) dependency. Easy peasey. I'm hoping that people will find this to be useful, and that people will be able to find it. :-) I'm using it. I like it. http://programmingperils.blogspot.com http://code.google.com/p/sandflea/wiki/MavenClojurePlugin On May 19, 9:46 pm, Mark Derricutt m...@talios.com wrote: Ahh is this where your contrib. ended up? I was waiting for you to post it to github or somewhere to merge into the master repo of clojure-maven-plugin. Would be good to keep things to one mojo imho. -- Pull me down under... On Sun, May 16, 2010 at 1:54 PM, Jason Smith ja...@lilypepper.com wrote: http://sandflea.googlecode.com/svn/site/SNAPSHOT/maven-clojure-plugin... I was originally going to try to put this into *clojure-maven-plugin*, but realized that there are lots of subtleties to cover that would be difficult as a sub-contributor. So I have created sandflea.clojure:maven-clojure-plugin. It currently has one goal, *execute*, that lets you execute Clojure scripts at any lifecycle state in the Maven build, with in-process access to various Maven objects (project, session, log, etc.). The link above shows an example. It's fairly simple. I'll add a few more, including adding new artifacts using Clojure, and maybe some ANT stuff. If you're into Maven, this might interest you. Still at an early stage in development, and I welcome feedback. This is not going to be a replacement for *clojure-maven-plugin*. I am not planning to add any functions that overlap what they are already doing so very well! -- 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 -- 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 athttp://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: do clojure and la(tex) have something in common ?
On 28 May 2010 21:15, Perry Trolard trol...@gmail.com wrote: Re: a clojure XPath/XQuery library that returns a lazy seq of the results, check out my wrapper of Michael Kay's Saxon library: http://github.com/pjt/saxon Saxon computes XPath results mostly lazily, I retain this laziness in my wrapper. (I say somewhat because Saxon stays one result element ahead of realization.) Thanks Perry. Which Saxon have you wrapped please? saxon655 or Saxon9he? regards -- Dave Pawson XSLT XSL-FO FAQ. Docbook FAQ. http://www.dpawson.co.uk -- 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
JIT Compilation on Android
I've got 1.2.0-master running on android froyo with a repl. Froyo supports JIT compilation, but whenever I call code which is defining a new class (e.g.: (defn blub [] nil)), I get an Exception: - clojure.core= (defn blub [] 1) java.lang.RuntimeException: java.lang.UnsupportedOperationException: can't load this type of class file (NO_SOURCE_FILE:15) clojure.core= - And the following error inside the android logs: - E/dalvikvm( 522): ERROR: defineClass(0x43e6e188, clojure.core$blub, 0x43f83a58, 0, 984, 0x0) - Am I doing something wrong/impossible or is there a way to fix this? -- 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
