- and type hints
Hello, Currently when you have a reflection warning in a - form, you have to split it: clojure.core= (- hello world (.split ) second (.split o) seq) Reflection warning, line: 1269 - call to split can't be resolved. (w rld) I propose to modify the - macro to make it preserve type hints, hence you could write: clojure.core= (- hello world (.split ) #^String second (.split o) seq) (w rld) Here is the patched macro: (defmacro - Threads the expr through the forms. Inserts x as the second item in the first form, making a list of it if it is not a list already. If there are more forms, inserts the first form as the second item in second form, etc. ([x] x) ([x form] (with-meta (if (seq? form) `(~(first form) ~x ~@(next form)) (list form x)) (meta form))) ([x form more] `(- (- ~x ~form) ~...@more))) -- Professional: http://cgrand.net/ (fr) On Clojure: http://clj-me.blogspot.com/ (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 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: - and type hints
Bad example: (- hello world (.split ) #^String second (.split o) seq) ; actually works but not: (- hello world (.split ) #^String (second) (.split o) seq) ; works only with the patched - Christophe Grand a écrit : Hello, Currently when you have a reflection warning in a - form, you have to split it: clojure.core= (- hello world (.split ) second (.split o) seq) Reflection warning, line: 1269 - call to split can't be resolved. (w rld) I propose to modify the - macro to make it preserve type hints, hence you could write: clojure.core= (- hello world (.split ) #^String second (.split o) seq) (w rld) Here is the patched macro: (defmacro - Threads the expr through the forms. Inserts x as the second item in the first form, making a list of it if it is not a list already. If there are more forms, inserts the first form as the second item in second form, etc. ([x] x) ([x form] (with-meta (if (seq? form) `(~(first form) ~x ~@(next form)) (list form x)) (meta form))) ([x form more] `(- (- ~x ~form) ~...@more))) -- Professional: http://cgrand.net/ (fr) On Clojure: http://clj-me.blogspot.com/ (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 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: - and type hints
Christophe Grand a écrit : Bad example: (- hello world (.split ) #^String second (.split o) seq) ; actually works but not: (- hello world (.split ) #^String (second) (.split o) seq) ; works only with the patched - Or I should put up and write (- hello world (.split ) (#^String second) (.split o) seq) Sorry for the noise. Christophe -- Professional: http://cgrand.net/ (fr) On Clojure: http://clj-me.blogspot.com/ (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 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 -~--~~~~--~~--~--~---
Feature Request: Easily Embeddable Console
IMHO it would be good if there were an easy (i.e. 1-line) way of embedding Clojure in an existing Swing app. most of the docs out there cover embedding it in a console application, or using Swank to connect over a socket. Ideally, either: JPanel panel = ...; panel.add(new ClojureConsole()); or JTextPane textpane = ...; ClojureConsole.installIntoTextPane(textpane); or something like that. What do people think would be the minimum requirements here? And if I were to write something like this would people be interested in seeing it added (to clojure or, maybe more appropriately, clojure-contrib) ? --~--~-~--~~~---~--~~ 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 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: Git with Google Code
Or you can just point github.com at the svn repo. Stuart Sierra wrote: FYI, for those interested in using Git for Clojure sources, here's Google's advice on how to use Git with Google Code: http://google-opensource.blogspot.com/2008/05/develop-with-git-on-google-code-project.html -SS --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com 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: cannot use swig native shared libraries
On Apr 27, 2009, at 8:45 PM, jim wrote: Hey Antonio, I'm getting a similar error. I wanted to call setuid from Clojure, so I followed this link's example: http://www2.sys-con.com/itsg/virtualcd/Java/archives/0510/Silverman/index.html to build a java class and a shared library. I added the class to my classpath and was able to import my UID class. But when I tried to call the UID.setuid method, it gave me that UnsatisfiedLinkError. Did you find a solution to your problem? Jim On Apr 22, 8:41 am, Antonio, Fabio Di Narzo antonio.fa...@gmail.com wrote: Hi all. I'm having problems with using swig-generated wrappers with Clojure. I'm running ubuntu-8.04-i386, gcc-4.2.4, swig-1.3.33, openjdk-1.6.0, latest clojure release. I've cut down a minimal reproducible example. (snip) Not a direct solution for whatever's going wrong with The Horror That Is SWIG, but have you guys tried using JNA instead? IIRC, the JRuby folks managed to get the entire POSIX library working through JNA, and I think I've seen mention of a similar success with the Win32API. --~--~-~--~~~---~--~~ 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 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 -~--~~~~--~~--~--~---
Example Server in Clojure
I wanted to write an example server in clojure to show some folks at the office what a full from the ground up application might look like in clojure. I wanted a non-trivial example, but not one so complex that a new clojure user wouldn't understand it. I had ported some decent algorithms we used over to clojure and was impressed at the expressiveness (moving something that took 500+ lines to express in a more popular language down to 71 sloc). However, that effort was not an application, just a set of functions running against test data. I ended up writing a chat server in clojure, thats weighs in at about 189 lines of code (not counting comments and blank lines). I am fairly new to clojure so I was hoping people could take a look at it and give constructive comments about what I did right and what I did wrong. The server implements users, chat rooms, private messaging and so forth. It also uses the concurrency built in so I could attempt to show off the concurrent nature of clojure to my colleagues. Some things to note: * I am new to clojure. I have about 4 weeks of experience now, about half of it spent reading up on clojure so I could write this thing. I am sure the code will show that off :( * I realize there is a specification for IRC. I wanted something simpler. * This server is just an example, and it is built around people using telnet to connect to it. It is not robust. Simple things like a client not reading its input will eventually hang a user thread. * Lots of IO, so unfortunately, quite a bit of side effects. I'll probably add features over time. But please, look at it and give me feedback so I can get better at clojure. Here's the link http://github.com/cmcclellen/crm.chat-server/tree/master --~--~-~--~~~---~--~~ 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 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: cannot use swig native shared libraries
2009/4/29 Tony Hursh tony.hu...@gmail.com: On Apr 27, 2009, at 8:45 PM, jim wrote: Hey Antonio, I'm getting a similar error. I wanted to call setuid from Clojure, so I followed this link's example: http://www2.sys-con.com/itsg/virtualcd/Java/archives/0510/Silverman/index.html to build a java class and a shared library. I added the class to my classpath and was able to import my UID class. But when I tried to call the UID.setuid method, it gave me that UnsatisfiedLinkError. Did you find a solution to your problem? Jim On Apr 22, 8:41 am, Antonio, Fabio Di Narzo antonio.fa...@gmail.com wrote: Hi all. I'm having problems with using swig-generated wrappers with Clojure. I'm running ubuntu-8.04-i386, gcc-4.2.4, swig-1.3.33, openjdk-1.6.0, latest clojure release. I've cut down a minimal reproducible example. (snip) Not a direct solution for whatever's going wrong with The Horror That Is SWIG, Sure, the SWIG C file is unreadable, and very far from an hypothetical handwritten C wrapper. However, I would underline that it works smoothly in the Java language, and only gives problems with Clojure. I'm also wondering now if the problem is restricted to my linux platform, or is more general (win, mac, different JDKs, etc.). but have you guys tried using JNA instead? I'm working with already existent (SWIG-based) libraries. I'll consider JNA for the future. Tnx for the tip. a. IIRC, the JRuby folks managed to get the entire POSIX library working through JNA, and I think I've seen mention of a similar success with the Win32API. -- Antonio, Fabio Di Narzo Ph.D. student at Department of Statistical Sciences University of Bologna, Italy --~--~-~--~~~---~--~~ 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 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: Git with Google Code
I believe git-svn doesn't work under msysgit. When I did have use git under windows, I used cygwin's git. It did everything that the *nix git could do. Luke On Apr 29, 4:03 am, Marko Kocić marko.ko...@gmail.com wrote: (defn on-windows [x] (use http://code.google.com/p/msysgit;) 'success) On 29 апр, 10:55, dysinger dysin...@gmail.com wrote: Let me abstract that out a little for you :P (defn on-windows [x] (format %s sucks on windows! x)) On Apr 28, 1:36 pm, Rayne disciplera...@gmail.com wrote: Git still sucks on windows :\ On Apr 28, 11:04 am, Stuart Sierra the.stuart.sie...@gmail.com wrote: FYI, for those interested in using Git for Clojure sources, here's Google's advice on how to use Git with Google Code: http://google-opensource.blogspot.com/2008/05/develop-with-git-on-goo... -SS --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com 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: UTF-8
On Apr 29, 2009, at 7:30 AM, David Powell wrote: So, I'd like to see the constants in RT.java changed to not specify UTF-8, but for the encoding used by the compiler to continue to specify UTF-8. Anyone have any opinions? I think your explanation, reasoning, and conclusions are all exactly correct and Clojure should change as you described. --Steve smime.p7s Description: S/MIME cryptographic signature
Re: Git with Google Code
git-svn has been reenabled in msysgit since one or two releases and works well. Luke Amdor a écrit : I believe git-svn doesn't work under msysgit. When I did have use git under windows, I used cygwin's git. It did everything that the *nix git could do. Luke On Apr 29, 4:03 am, Marko Kocić marko.ko...@gmail.com wrote: (defn on-windows [x] (use http://code.google.com/p/msysgit;) 'success) On 29 апр, 10:55, dysinger dysin...@gmail.com wrote: Let me abstract that out a little for you :P (defn on-windows [x] (format %s sucks on windows! x)) On Apr 28, 1:36 pm, Rayne disciplera...@gmail.com wrote: Git still sucks on windows :\ On Apr 28, 11:04 am, Stuart Sierra the.stuart.sie...@gmail.com wrote: FYI, for those interested in using Git for Clojure sources, here's Google's advice on how to use Git with Google Code: http://google-opensource.blogspot.com/2008/05/develop-with-git-on-goo... -SS -- Professional: http://cgrand.net/ (fr) On Clojure: http://clj-me.blogspot.com/ (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 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: UTF-8
On Apr 29, 1:30 pm, David Powell djpow...@djpowell.net wrote: So, I'd like to see the constants in RT.java changed to not specify UTF-8, but for the encoding used by the compiler to continue to specify UTF-8. +1 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com 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: UTF-8
Yes, not fixing it before 1.0 would be the kind of thing that people willing to make FUD on clojure would exploit really easily with great success: clojure does not even handle encoding problems well :'( 2009/4/29 Toralf toralf.witt...@gmail.com: On Apr 29, 1:30 pm, David Powell djpow...@djpowell.net wrote: So, I'd like to see the constants in RT.java changed to not specify UTF-8, but for the encoding used by the compiler to continue to specify UTF-8. +1 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com 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: Git with Google Code
http://article.gmane.org/gmane.comp.version-control.git/117039 On Apr 29, 1:01 am, Dan redalas...@gmail.com wrote: On Tue, Apr 28, 2009 at 4:36 PM, Rayne disciplera...@gmail.com wrote: Git still sucks on windows :\ On which grounds? Or as wikipedia would put it [citation needed] --~--~-~--~~~---~--~~ 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 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 -~--~~~~--~~--~--~---
java enum problem
Hello to community.
I'm trying to convert this jMonkey Engine java's code to Clojure:
.
public class TestSimpleGame extends SimpleGame {
public static void main(String[] args) {
TestSimpleGame app = new TestSimpleGame();
app.setConfigShowMode(ConfigShowMode.AlwaysShow);
app.start();
}
protected void simpleInitGame() {
display.setTitle(A Simple Test);
Box box = new Box(my box, new Vector3f(0, 0, 0), 2, 2, 2);
box.setModelBound(new BoundingSphere());
box.updateModelBound();
rootNode.attachChild(box);
}
}
..
ConfigShowMode is enum type:
public abstract class AbstractGame {
private static final Logger logger = Logger.getLogger
(AbstractGame.class
.getName());
public enum ConfigShowMode {
NeverShow,
AlwaysShow,
ShowIfNoConfig;
}
..
so my failure attempt was:
..
(ns jME-hello
(:import (com.jme.app SimpleGame AbstractGame)
(com.jme.math Vector3f)
(com.jme.scene.shape Box)))
(def b (Box. My box (Vector3f. 0 0 0)(Vector3f. 1 1 1)))
(def AShow (proxy [Enum] [AlwaysShow 1]))
(defn main []
(let [app (proxy [SimpleGame] []
(.simpleInitGame []
(. (proxy-super rootNoode) attachChild b)))]
(.setConfigShowMode app AShow)
(.start app)))
(main)
..
java.lang.ClassCastException: clojure.proxy.java.lang.Enum cannot be
cast to com.jme.app.AbstractGame$ConfigShowMode (NO_SOURCE_FILE:0)
[Thrown class clojure.lang.Compiler$CompilerException]
Obviously this is newbie problem,
and I made enum type according to previous mails.
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Re: how do I create a runnable clojure program
Hi Santanu, Unfortunately, this is not a well-documented area, but it is possible. Here's the high-level view, but don't expect these instructions to be sufficient: 1. Put (:gen-class) in the (ns...) declaration in your .clj file. 2. Add a -main function like: (defn -main [ args] ...) 3. Compile your namespace with (compile...) This generates .class files. 4. Run your class with java your.namespace.name 5. (Optional) Use jar or ant to create a .jar file with a manifest that specifies your class as the Main-Class. No, this is not easy. You need to know Java pretty thoroughly to have any hope of success. At some point I hope to write an article with more details. In the mean time, search the list to learn about gen- class and compile. -Stuart Sierra On Apr 29, 7:04 am, Santanu thisissant...@gmail.com wrote: Hi Everybody, I wanted to compile a .clj clojure file into a .jar/.class file so that I could run it using java. (I don't know what is the actual way to run clojure file. So far, I have only been trying it from within emacs/slime). But I don't know how to create the .class/.jar file. I also don't know how to use ant (is that required?). I know javac can be applied on a .java file to get a .class file... but I dunno what applies to a .clj file? Kindly suggest how do I do this. Any pointer(s) to a suitable online article would be great. Thanks in advance for your help. Reards, Santanu Chatterjee --~--~-~--~~~---~--~~ 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 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: how do I create a runnable clojure program
There was a very recent thread on the list related to the same question: http://groups.google.com/group/clojure/browse_thread/thread/750e5795141cff35# HTH, Travis On Apr 29, 7:04 am, Santanu thisissant...@gmail.com wrote: Hi Everybody, I wanted to compile a .clj clojure file into a .jar/.class file so that I could run it using java. (I don't know what is the actual way to run clojure file. So far, I have only been trying it from within emacs/slime). But I don't know how to create the .class/.jar file. I also don't know how to use ant (is that required?). I know javac can be applied on a .java file to get a .class file... but I dunno what applies to a .clj file? Kindly suggest how do I do this. Any pointer(s) to a suitable online article would be great. Thanks in advance for your help. Reards, Santanu Chatterjee --~--~-~--~~~---~--~~ 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 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: how do I create a runnable clojure program
On Apr 29, 1:04 pm, Santanu thisissant...@gmail.com wrote: Hi Everybody, I wanted to compile a .clj clojure file into a .jar/.class file so that I could run it using java. (I don't know what is the actual way to run clojure file. So far, I have only been trying it from within emacs/slime). But I don't know how to create the .class/.jar file. I also don't know how to use ant (is that required?). I know javac can be applied on a .java file to get a .class file... but I dunno what applies to a .clj file? Kindly suggest how do I do this. Any pointer(s) to a suitable online article would be great. I remember this helped me: http://clojure.org/compilation Cheers Raphaël Thanks in advance for your help. Reards, Santanu Chatterjee --~--~-~--~~~---~--~~ 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 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: Example Server in Clojure
I'm new to Clojure as well and am also writing a server. Side effects are hard to avoid when doing things like I/O, so I wouldn't feel too bad about it. From the looks of your code, you've done a nice job separating things like network communication from the business logic of your chat server. I had a look at server-socket in clojure.contrib when I started my project, but it appeared to create a thread per connection, so I opted against it. I'm no expert, but I think you might get better scalability using something like ThreadPoolExecutor to manage your threads. It probably doesn't matter in your case as you've said it was a proof of concept, but I'm just throwing that out there. To test the basics of my server, I setup something in ruby to make thousands of concurrent connections and see how Clojure would scale. Somewhere in the 3000-4000 simultaneous connection range, the ruby script crashed with an error of too many files open. Meanwhile the Clojure program had 15 threads open and was chugging along nicely ;-). Of course, this was with Ruby 1.8.x, so things might be better in the 1.9 branch. Travis On Apr 28, 7:27 pm, Chris McClellen chris.mcclel...@gmail.com wrote: I wanted to write an example server in clojure to show some folks at the office what a full from the ground up application might look like in clojure. I wanted a non-trivial example, but not one so complex that a new clojure user wouldn't understand it. I had ported some decent algorithms we used over to clojure and was impressed at the expressiveness (moving something that took 500+ lines to express in a more popular language down to 71 sloc). However, that effort was not an application, just a set of functions running against test data. I ended up writing a chat server in clojure, thats weighs in at about 189 lines of code (not counting comments and blank lines). I am fairly new to clojure so I was hoping people could take a look at it and give constructive comments about what I did right and what I did wrong. The server implements users, chat rooms, private messaging and so forth. It also uses the concurrency built in so I could attempt to show off the concurrent nature of clojure to my colleagues. Some things to note: * I am new to clojure. I have about 4 weeks of experience now, about half of it spent reading up on clojure so I could write this thing. I am sure the code will show that off :( * I realize there is a specification for IRC. I wanted something simpler. * This server is just an example, and it is built around people using telnet to connect to it. It is not robust. Simple things like a client not reading its input will eventually hang a user thread. * Lots of IO, so unfortunately, quite a bit of side effects. I'll probably add features over time. But please, look at it and give me feedback so I can get better at clojure. Here's the link http://github.com/cmcclellen/crm.chat-server/tree/master --~--~-~--~~~---~--~~ 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 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: java enum problem
On Apr 29, 10:14 am, brus emil.bru...@gmail.com wrote: (def AShow (proxy [Enum] [AlwaysShow 1])) I don't think you can proxy an enumeration. You can use gen-class, but even that doesn't work perfectly. You may need to break down and write some Java. -Stuart Sierra --~--~-~--~~~---~--~~ 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 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: Example Server in Clojure
Hi, Not a thourough analysis of your code, but still one remark at least : For each of your files that are part of a namespace but the main file, you should consider placing an (in-ns 'name.of.the.loading.ns) call at the top of the file. This will help IDEs, and also you when you just want to reload that particular file HTH, -- Laurent 2009/4/29 Chris McClellen chris.mcclel...@gmail.com: I wanted to write an example server in clojure to show some folks at the office what a full from the ground up application might look like in clojure. I wanted a non-trivial example, but not one so complex that a new clojure user wouldn't understand it. I had ported some decent algorithms we used over to clojure and was impressed at the expressiveness (moving something that took 500+ lines to express in a more popular language down to 71 sloc). However, that effort was not an application, just a set of functions running against test data. I ended up writing a chat server in clojure, thats weighs in at about 189 lines of code (not counting comments and blank lines). I am fairly new to clojure so I was hoping people could take a look at it and give constructive comments about what I did right and what I did wrong. The server implements users, chat rooms, private messaging and so forth. It also uses the concurrency built in so I could attempt to show off the concurrent nature of clojure to my colleagues. Some things to note: * I am new to clojure. I have about 4 weeks of experience now, about half of it spent reading up on clojure so I could write this thing. I am sure the code will show that off :( * I realize there is a specification for IRC. I wanted something simpler. * This server is just an example, and it is built around people using telnet to connect to it. It is not robust. Simple things like a client not reading its input will eventually hang a user thread. * Lots of IO, so unfortunately, quite a bit of side effects. I'll probably add features over time. But please, look at it and give me feedback so I can get better at clojure. Here's the link http://github.com/cmcclellen/crm.chat-server/tree/master --~--~-~--~~~---~--~~ 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 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: learning clojure, converting a sequence with repetitions to a multi-map
Thanks Christophe,
Using a default return value, you can rewrite the (if-let...) as (conj
(amap key ()) item).
A good point, getting clojure and clojure :)
(defn seq-to-multimap
takes a sequence s of possibly repeating elements
and converts it to a map, where keys are obtained
by applying key-fn to elements of s and values are
sequences of all elements of s with a given key
[s key-fn]
(reduce
(fn [m el]
(let [key (key-fn el)]
(assoc m key (conj (m key []) el
{} s))
Boris
On Apr 28, 5:31 pm, Christophe Grand christo...@cgrand.net wrote:
Hi Boris,
Boris Mizhen a écrit :
I am starting to learn clojure. I would appreciate comments on the
utility function below.
Coding style, idiomatic Clojure, comment style, efficiency, naming
conventions, indentations (used slime) ... anything I should
improve :)
(defn seq-to-multimap [s key-fn]
takes a sequence s of possibly repeating elements
and converts it to a map, where keys are obtained by applying key-
fn
to elements of s and values are sequence of all elements of s with
the
particular key
(reduce
(fn [amap item]
(let [key (key-fn item)]
(assoc amap key
(if-let [it (amap key)]
(conj it item)
(list item)
{} s))
First, you misplaced the docstring: it comes before the args vector.
Using a default return value, you can rewrite the (if-let...) as (conj
(amap key ()) item).
user (seq-to-multimap [1 :key :key 2 3 3 nil] #(identity %1))
{nil (nil), 3 (3 3), 2 (2), :key (:key :key), 1 (1)}
Here you don't need to write #(identity %1), identity suffices.
Would it be better to have this function to create a list of lists
using an equality op instead?
I think it's a better choice to have it return a map because, to compute
the result, you need to efficiently index by key.
--
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On Clojure:http://clj-me.blogspot.com/(en)
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Re: java enum problem
On 29 tra, 17:00, Stuart Sierra the.stuart.sie...@gmail.com wrote: On Apr 29, 10:14 am, brus emil.bru...@gmail.com wrote: (def AShow (proxy [Enum] [AlwaysShow 1])) I don't think you can proxy an enumeration. You can use gen-class, but even that doesn't work perfectly. You may need to break down and write some Java. -Stuart Sierra Actually that enum is not needed for display test, but sooner or later others could be. Thanks for suggestion Stuart. Emil --~--~-~--~~~---~--~~ 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 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 talk in NYC May 12
Hi, Clojurians, I'll be talking about my work with Clojure at LispNYC on Tuesday, May 12. Time (evening) location to be announced. Slides and (hopefully) video available after. Possible topics: * Clojure with Java libraries like Hadoop Solr * Deploying a web server with Clojure Restlet * Clojure libs I've written, like test-is -Stuart Sierra --~--~-~--~~~---~--~~ 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 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 talk in NYC May 12
On Apr 29, 11:16 am, Stuart Sierra the.stuart.sie...@gmail.com wrote: Hi, Clojurians, I'll be talking about my work with Clojure at LispNYC on Tuesday, May 12. Time (evening) location to be announced. Slides and (hopefully) video available after. Possible topics: * Clojure with Java libraries like Hadoop Solr * Deploying a web server with Clojure Restlet * Clojure libs I've written, like test-is I'll be there - looking forward to it! Rich --~--~-~--~~~---~--~~ 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 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 talk in NYC May 12
2009/4/29 Stuart Sierra the.stuart.sie...@gmail.com: Hi, Clojurians, I'll be talking about my work with Clojure at LispNYC on Tuesday, May 12. Time (evening) location to be announced. Slides and (hopefully) video available after. Excellent, keep us informed when the video are available! Have a nice talk, -- 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 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: learning clojure, converting a sequence with repetitions to a multi-map
Thanks Jason.
merge-with seems to be made to support a function like this, I wonder
where is the slowdown coming from? Is apply slow?
I named your version seq-to-multimap2. The timing results are below:
user (def a (reverse (take 10 (iterate (fn [x] (rand-int 100))
1
#'user/a
user (time (def b (seq-to-multimap2 a identity)))
Elapsed time: 443.774747 msecs
#'user/b
user (time (def b (seq-to-multimap a identity)))
Elapsed time: 146.814412 msecs
#'user/b
user (def a (reverse (take 10 (iterate (fn [x] (rand-int 10))
1
#'user/a
user (time (def b (seq-to-multimap a identity)))
Elapsed time: 70.812128 msecs
#'user/b
user (time (def b (seq-to-multimap2 a identity)))
Elapsed time: 284.089358 msecs
#'user/b
user (def a (reverse (take 10 (iterate (fn [x] (rand-int 1))
1
#'user/a
user (time (def b (seq-to-multimap2 a identity)))
Elapsed time: 530.553921 msecs
#'user/b
user (time (def b (seq-to-multimap a identity)))
Elapsed time: 240.03259 msecs
#'user/b
Regards,
Boris
On Apr 28, 7:28 pm, Jason Wolfe jawo...@berkeley.edu wrote:
(defn seq-to-multimap
takes a sequence s of possibly repeating elements
and converts it to a map, where keys are obtained by applying key-
fn
to elements of s and values are sequence of all elements of s with
the particular key
[s key-fn]
(apply merge-with concat
(map (fn [x] {(key-fn x) [x]}) s)))
Here's a more concise, but probably significantly slower version
-Jason
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Re: Clojure talk in NYC May 12
On Apr 29, 11:21 am, Rich Hickey richhic...@gmail.com wrote: I'll be there - looking forward to it! Ooh, pressure. Guess I gotta make it good. -SS --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com 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: learning clojure, converting a sequence with repetitions to a multi-map
IMHO, the slowdown comes from allocation:
with
(apply merge-with concat (map (fn [x] {(key-fn x) [x]}) s))
you build a map containing a vector, plus a seq (merge-with calls seq on each
argument) for each item before performing a reduction which calls assoc and
concat.
In seq-to-multimap you only perform a reduction which calls assoc and conj.
Plus in seq-to-multimap2, the values of the returned map are unrealized lazy
seqs.
Boris Mizhen a écrit :
Thanks Jason.
merge-with seems to be made to support a function like this, I wonder
where is the slowdown coming from? Is apply slow?
I named your version seq-to-multimap2. The timing results are below:
user (def a (reverse (take 10 (iterate (fn [x] (rand-int 100))
1
#'user/a
user (time (def b (seq-to-multimap2 a identity)))
Elapsed time: 443.774747 msecs
#'user/b
user (time (def b (seq-to-multimap a identity)))
Elapsed time: 146.814412 msecs
#'user/b
user (def a (reverse (take 10 (iterate (fn [x] (rand-int 10))
1
#'user/a
user (time (def b (seq-to-multimap a identity)))
Elapsed time: 70.812128 msecs
#'user/b
user (time (def b (seq-to-multimap2 a identity)))
Elapsed time: 284.089358 msecs
#'user/b
user (def a (reverse (take 10 (iterate (fn [x] (rand-int 1))
1
#'user/a
user (time (def b (seq-to-multimap2 a identity)))
Elapsed time: 530.553921 msecs
#'user/b
user (time (def b (seq-to-multimap a identity)))
Elapsed time: 240.03259 msecs
#'user/b
Regards,
Boris
On Apr 28, 7:28 pm, Jason Wolfe jawo...@berkeley.edu wrote:
(defn seq-to-multimap
takes a sequence s of possibly repeating elements
and converts it to a map, where keys are obtained by applying key-
fn
to elements of s and values are sequence of all elements of s with
the particular key
[s key-fn]
(apply merge-with concat
(map (fn [x] {(key-fn x) [x]}) s)))
Here's a more concise, but probably significantly slower version
-Jason
--
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On Clojure: http://clj-me.blogspot.com/ (en)
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Re: Example Server in Clojure
Chris McClellen chris.mcclel...@gmail.com writes: I ended up writing a chat server in clojure, thats weighs in at about 189 lines of code (not counting comments and blank lines). I am fairly new to clojure so I was hoping people could take a look at it and give constructive comments about what I did right and what I did wrong. Cool. I wrote a small multiplayer text adventure game to use as an example in the PeepCode screencast. [1] But the code is small and pretty understandable, so it might be interesting if you want to take a look at a fairly similar project. http://github.com/technomancy/mire I have it broken up into steps where each one builds on the last. Each step is stored as a separate git branch, so you can walk through the creation of the project as it occurred. Hope it's useful! Phil http://technomancy.us [1] - http://peepcode.com/products/functional-programming-with-clojure --~--~-~--~~~---~--~~ 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 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: Feature Request: Easily Embeddable Console
See repl.clj in the files section. I've embedded it in a few of my apps, and it's quite nice. --~--~-~--~~~---~--~~ 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 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: Getting slime-edit-definition to work with Clojure
Here's a .emacs snippet that works for me: ;; SLIME setup (clojure) (add-to-list 'load-path ~/.emacs.d/slime/) ; your SLIME directory (add-to-list 'load-path ~/.emacs.d/) ; clojure-mode.el is here (add-to-list 'load-path ~/.emacs.d/swank-clojure) ; swank-clojure directory (setq swank-clojure-binary ~/bin/clojure) ; shell script that invokes clojure (require 'clojure-mode) (require 'swank-clojure-autoload) (require 'slime) (eval-after-load slime '(progn (add-to-list 'load-path ~/.emacs.d/slime/contrib) (slime-setup '(slime-fancy slime-banner)) (setq slime-complete-symbol*-fancy t) (setq slime-complete-symbol-function 'slime-fuzzy-complete-symbol))) You can of course remove the slime-fancy and the slime-banner if you wish. I hope this helps --Chris On Tue, Apr 28, 2009 at 1:28 PM, Baishampayan Ghose b.gh...@ocricket.com wrote: Phil, I suspect the problem might have to do with the fact that you're configuring slime for both SBCL and Clojure. I know it's possible to get this working, but it's a lot more complicated that way. I'd suggest having one file for clojure slime config and one for sbcl, and only load one of them per Emacs instance. I'm sure someone who's more familiar with SLIME and Common Lisp could figure out a solution, but this seems like simplest solution. My eyes lit up for a second! I removed all SBCL support from SLIME and it still doesn't work :( Can you kindly share your working dotfiles and enlighten me? My current .emacs has this: ;;; (require 'slime) (slime-setup '(slime-fancy slime-banner slime-mdot-fu)) (defvar slime-net-coding-system (find-if 'slime-find-coding-system '(utf-8-unix iso-latin-1-unix iso-8859-1-unix binary))) ;;; Clojure specific (defvar clj-root (concat (expand-file-name ~) /clojure/)) (setq load-path (append (list (concat clj-root clojure-mode) (concat clj-root swank-clojure)) load-path)) (setq swank-clojure-binary clojure) (require 'swank-clojure-autoload) (add-to-list 'slime-lisp-implementations '(clojure (/home/ghoseb/bin/clojure) :init swank-clojure-init)) (require 'clojure-mode) (eval-after-load 'clojure-mode '(clojure-slime-config)) (autoload 'clojure-mode clojure-mode A major mode for Clojure t) (add-to-list 'auto-mode-alist '(\\.clj$ . clojure-mode)) (defun lisp-enable-paredit-hook () (paredit-mode 1)) (add-hook 'clojure-mode-hook 'lisp-enable-paredit-hook) (defun clj () Starts Clojure in Slime (interactive) (slime 'clojure)) ;;; Regards, BG -- Baishampayan Ghose b.gh...@ocricket.com oCricket.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 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: UTF-8
On Apr 29, 9:25 am, Laurent PETIT laurent.pe...@gmail.com wrote: Yes, not fixing it before 1.0 would be the kind of thing that people willing to make FUD on clojure would exploit really easily with great success: clojure does not even handle encoding problems well Ok - patch welcome ASAP (not singling out you Laurent :) Thanks, Rich 2009/4/29 Toralf toralf.witt...@gmail.com: On Apr 29, 1:30 pm, David Powell djpow...@djpowell.net wrote: So, I'd like to see the constants in RT.java changed to not specify UTF-8, but for the encoding used by the compiler to continue to specify UTF-8. +1 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com 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: more vimclojure
Hi, Am 29.04.2009 um 04:42 schrieb Johan Berntsson: I've been emailing directly to Meikel, but perhaps a issue tracker of some kind would be good? It is of course up to Meikel, and VimClojure is already good enough for me to use for all my Clojure hacking (including some paid work). As for bug reports there are several possible places: - here (I feel a little uncomfortable with that, but as long as the I can't get SLIME to work thread show up, it's ok, I think) - me (writing a personal mail is always possible) - the issue tracker: http://bitbucket.org/kotarak/vimclojure/issues/ Although I'd like to follow Rich's example and would like to request, that issues are discussed with me before a ticket is opened. I'm glad to see that VimClojure has a growing user basis and people have good experiences with it. :) Sincerely Meikel smime.p7s Description: S/MIME cryptographic signature
Re: more vimclojure
Hi Adrian, Am 29.04.2009 um 07:00 schrieb Adrian Cuthbertson: In the absence of an issue tracker at this time, could I mention the following relating to indenting; (defn xxx Some stuff... (defmacro xxx Some stuff... (defroutes xxx Some stuf... This can be configured using the lispwords option of Vim. Do a :setlocal lispwords+=defroutes and you should get the desired behaviour. This is a built-in functionality. Since I come from Scheme, I knew this option. However this question arose several times now, so I guess that people coming eg. from Java don't know this Vim option. So my cultural assumption that Lisp hackers know this is maybe true, but not really applicable here. I will extend the documentation. Thanks Meikel, great work! Thanks for the feedback! :) Sincerely Meikel smime.p7s Description: S/MIME cryptographic signature
Re: UTF-8
On Apr 29, 2009, at 12:54 PM, Rich Hickey wrote: Ok - patch welcome ASAP (not singling out you Laurent :) I've entered an issue and provided a patch: http://code.google.com/p/clojure/issues/detail?id=112 Thanks, --Steve smime.p7s Description: S/MIME cryptographic signature
Re: Clojure talk in NYC May 12
I will be there too. On Apr 29, 11:16 am, Stuart Sierra the.stuart.sie...@gmail.com wrote: Hi, Clojurians, I'll be talking about my work with Clojure at LispNYC on Tuesday, May 12. Time (evening) location to be announced. Slides and (hopefully) video available after. Possible topics: * Clojure with Java libraries like Hadoop Solr * Deploying a web server with Clojure Restlet * Clojure libs I've written, like test-is -Stuart Sierra --~--~-~--~~~---~--~~ 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 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: Getting slime-edit-definition to work with Clojure
Baishampayan Ghose b.gh...@ocricket.com writes: Can you kindly share your working dotfiles and enlighten me? I use M-x clojure-install plus (clojure-slime-config), since I wrote it. This this is _all_ you need for projects that don't have dependencies on third-party jars. For some other projects, I've been using maven to handle the dependencies. For those, I use this function to start up SLIME: (defun slime-project (path) Setup classpaths for a clojure project and starts a new SLIME session. Kills existing SLIME session, if any. (interactive (list (ido-read-directory-name Project root: (locate-dominating-file default-directory pom.xml (when (get-buffer *inferior-lisp*) (kill-buffer *inferior-lisp*)) (setq swank-clojure-binary nil swank-clojure-jar-path (expand-file-name target/dependency/ path) swank-clojure-extra-classpaths (mapcar (lambda (d) (expand-file-name d path)) '(src/ target/classes/ test/)) swank-clojure-extra-vm-args (list (format -Dclojure.compile.path=%s (expand-file-name target/classes/ path))) slime-lisp-implementations (cons `(clojure ,(swank-clojure-cmd) :init swank-clojure-init) (remove-if #'(lambda (x) (eq (car x) 'clojure)) slime-lisp-implementations))) (save-window-excursion (slime))) The main difference is that the project is self-contained; it uses the copy of clojure that Maven has placed in target/dependency, and all the dependent jars are unpacked there too. It does require Emacs23 for the call to locate-dominating-file. (setq swank-clojure-binary clojure) (add-to-list 'slime-lisp-implementations '(clojure (/home/ghoseb/bin/clojure) :init swank-clojure-init)) It looks like you're using a wrapper script rather than letting swank-clojure construct a java command-line invocation. I'm not sure why you're doing this; working with the defaults might fix it. -Phil --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com 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: more vimclojure
I'd like to add how great I think VimClojure is. It's truly an amazing environment and I don't think I'd be able to enjoy clojure as much without it. I'm too committed to vim to learn emacs for a new language. Thanks a lot Meikel! On Apr 29, 10:13 am, Meikel Brandmeyer m...@kotka.de wrote: Hi Adrian, Am 29.04.2009 um 07:00 schrieb Adrian Cuthbertson: In the absence of an issue tracker at this time, could I mention the following relating to indenting; (defn xxx Some stuff... (defmacro xxx Some stuff... (defroutes xxx Some stuf... This can be configured using the lispwords option of Vim. Do a :setlocal lispwords+=defroutes and you should get the desired behaviour. This is a built-in functionality. Since I come from Scheme, I knew this option. However this question arose several times now, so I guess that people coming eg. from Java don't know this Vim option. So my cultural assumption that Lisp hackers know this is maybe true, but not really applicable here. I will extend the documentation. Thanks Meikel, great work! Thanks for the feedback! :) Sincerely Meikel smime.p7s 5KViewDownload --~--~-~--~~~---~--~~ 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 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: more vimclojure
Hi, Am 29.04.2009 um 19:07 schrieb Meikel Brandmeyer: - here (I feel a little uncomfortable with that, but as long as the I can't get SLIME to work thread show up, it's ok, I think) A fourth place is now the VimClojure Google Group: http://groups.google.com/group/vimclojure Sincerely Meikel smime.p7s Description: S/MIME cryptographic signature
Re: how do I create a runnable clojure program
Thanks everyone for your suggestions. I somehow managed to compile my first clojure program, generating a class file that I could run using java. I started with the overview provided by Stuart Sierra, and read the article pointed by Raphaël. Didn't work at first, but after some trial and error, it worked somehow. The main problem is that I don't know any Java yet (I just started reading Core Java vol.1 as suggested by this group a few days ago). Anyways, I am mentioning the process I used. Please suggest any better (shorter/simpler) ways if you feel this is not the right way to do it. 1. I created a simple test2.clj file in my $HOME: --- (ns test2 (:gen-class)) (defn -main [ args] (println Hello, world of Clojure!)) 2. I started a clojure REPL, from a terminal: sant...@lenny:~$ java -cp /home/santanu/:/opt/clojure/clojure.jar clojure.lang.Repl 3. Inside the REPL, I compiled my program using: (binding [*compile-path* /home/santanu] (do (load-file test2.clj) (compile 'test2))) 4. Got out of the REPL, and ran the program using: sant...@lenny:~$ java -cp ./:/opt/clojure/clojure.jar test2 Hello, world of Clojure! One thing I noticed was that the above run takes an aweful amount of time to run, much much more than a similar compiled java program: - sant...@lenny:~$ time java -cp /home/santanu/:/opt/clojure/clojure.jar test2 Hello, world of Clojure! real0m1.093s user0m0.952s sys 0m0.064s sant...@lenny:~$ time java Test Hello, World of Java! real0m0.105s user0m0.040s sys 0m0.008s - I think I am definitely missing something here. Regards, Santanu Chatterjee --~--~-~--~~~---~--~~ 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 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: UTF-8
On Apr 29, 1:24 pm, Stephen C. Gilardi squee...@mac.com wrote: On Apr 29, 2009, at 12:54 PM, Rich Hickey wrote: Ok - patch welcome ASAP (not singling out you Laurent :) I've entered an issue and provided a patch: http://code.google.com/p/clojure/issues/detail?id=112 Patch applied - rev 1360 - thanks! Rich --~--~-~--~~~---~--~~ 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 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 -~--~~~~--~~--~--~---
The function of clojure.contrib.accumulators
Could someone give me a simple example of when clojure.contrib.accumulators is useful? Its use seems to involve collections (and numbers) that have the :clojure.contrib.accumulators/ accumulator type, and it has some general multimethods for adding and combining, but what does it add that conj and concat do not provide? contrib.monads/writer-m seems to suggest using accumulators, too... --~--~-~--~~~---~--~~ 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 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: UTF-8
For those on OS X -- who probably don't want the default MacRoman -- or anyone else who wants to override the system default, I wanted to point out that setting the file.encoding system property when invoking java (e.g. `java -Dfile.encoding=UTF-8 ... clojure.main`) will set the encoding for in, out, err. If you want to override globally, this is easier than re-binding the vars. 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 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: UTF-8
2009/4/29 Stephen C. Gilardi squee...@mac.com: On Apr 29, 2009, at 12:54 PM, Rich Hickey wrote: Ok - patch welcome ASAP (not singling out you Laurent :) I've entered an issue and provided a patch: http://code.google.com/p/clojure/issues/detail?id=112 That was quick ! :-) --~--~-~--~~~---~--~~ 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 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: Git with Google Code
no you have that the wrong way around. windows sucks :) if you dont want to (or can't) use git-svn i maintain a mirror on git hub (http://github.com/kevinoneill/clojure/tree/master). -k. On Wed, Apr 29, 2009 at 6:36 AM, Rayne disciplera...@gmail.com wrote: Git still sucks on windows :\ On Apr 28, 11:04 am, Stuart Sierra the.stuart.sie...@gmail.com wrote: FYI, for those interested in using Git for Clojure sources, here's Google's advice on how to use Git with Google Code: http://google-opensource.blogspot.com/2008/05/develop-with-git-on-goo... -SS -- email: ke...@oneill.id.au web: http://kevin.oneill.id.au/ If you don't test then your code is only a collection of bugs which apparently behave like a working program. --~--~-~--~~~---~--~~ 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 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: Git with Google Code
On Wed, Apr 29, 2009 at 3:57 PM, Kevin O'Neill ke...@oneill.id.au wrote: no you have that the wrong way around. windows sucks :) if you dont want to (or can't) use git-svn i maintain a mirror on git hub (http://github.com/kevinoneill/clojure/tree/master). Thanks for maintaining that, it's what I always use to check out Clojure. I'm curious, how frequently is that updated from SVN? (Meaning, what is the longest amount of time a commit can exist in SVN but not in your mirror?) I've never had a problem, but I'd like to know for future reference. -- Cosmin Stejerean http://offbytwo.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 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 -~--~~~~--~~--~--~---
Metadata for Any Object
Hey gang,
Metadata support for pure Java objects is not currently supported, because
it requires a modification to the object. Additionally, only some Clojure
objects support metadata, due to the necessity of implementing the IMeta
interface. This can be confusing for new users, and eliminates some of the
utility.
Instead of attaching the metadata directly to the object, what if the
metadata was stored outside the object, in a global map of {object metadata,
...}? In order to handle garbage collection, something similar to Java's
WeakHashMap could be used, with the object itself as the key.
I know global state is Considered Harmful, but I think this would clarify
the usage of metadata, and remove duplication in the implementation of
Clojure.
Thoughts?
Stu
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Monads tutorial Part 2
I've just posted the second part of my monads tutorial at: http://intensivesystems.net/tutorials/monads_201.html I need to proof it further, so if you see problems with content, grammar or spelling. Comment here or send me an email. Jim --~--~-~--~~~---~--~~ 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 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 -~--~~~~--~~--~--~---
Dropping strings.
Hi, I was wondering if there's a drop function somewhere in contrib that work for strings. I didn't found any so I wrote my own: (defn drop-str ([s] (drop-str 1 s)) ([n s] (apply str (drop n (seq s) This is not really fast, a better version would be something like that: (defn drop-str [n #^String s] (let [l (.length s)] (.substring s (if ( n l) l n Any suggestions? - budu --~--~-~--~~~---~--~~ 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 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 -~--~~~~--~~--~--~---
update/update-in
Hi, I was wondering why there was no update to update-in? But there is an assoc to assoc-in and a get to a get-in. - Mike --~--~-~--~~~---~--~~ 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 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: update/update-in
Because update-in can use any function to do the update. On Wed, Apr 29, 2009 at 6:54 PM, mifrai fraim...@gmail.com wrote: Hi, I was wondering why there was no update to update-in? But there is an assoc to assoc-in and a get to a get-in. - Mike --~--~-~--~~~---~--~~ 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 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: update/update-in
Thanks for the quick reply and I understand that's the functionality of it. But just like get-in is the recursive form of get - I'm just wondering why there's no singular form of update-in. I know it's not much more work to go (update-in map [:single-key] conj 3) - but from experience there tends be really good reasons behind these kinds of decisions and I'm just curious. On Apr 29, 4:05 pm, David Nolen dnolen.li...@gmail.com wrote: Because update-in can use any function to do the update. On Wed, Apr 29, 2009 at 6:54 PM, mifrai fraim...@gmail.com wrote: Hi, I was wondering why there was no update to update-in? But there is an assoc to assoc-in and a get to a get-in. - Mike --~--~-~--~~~---~--~~ 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 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: Metadata for Any Object
On Apr 29, 5:58 pm, Stu Hood stuh...@gmail.com wrote:
Instead of attaching the metadata directly to the object, what if the
metadata was stored outside the object, in a global map of {object metadata,
...}? In order to handle garbage collection, something similar to Java's
WeakHashMap could be used, with the object itself as the key.
Interesting idea.
There might be performance penalities, depending on how often metadata
is used. Metadata guarantees atomic updates (alter-meta!) so the
WeakHashMap might need to be wrapped in a synchronized map, at a
further penalty.
I've never needed metadata on non-Clojure types. Do you have a use in
mind?
This could be a library, too, sort of like:
(defn my-meta [object]
(if (instance? clojure.lang.IMeta object)
(meta object)
(*global-metadata* object)))
-SS
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regex replace all?
Does clojure come with a built-in regex replace method? I see ones for re-split, re-seq etc. but nothing for a simple replace, I've been using: (defn replace-all [st reps] (reduce #(.replaceAll %1 (first %2) (second %2)) st reps)) but wondered if I was just missing some builtin? -- Discouragement is a dissatisfaction with the past, a distaste for the present, and a distrust of the future - Maree De Jong, Life Church New Zealand. http://www.talios.com Sent from Auckland, Auk, New Zealand --~--~-~--~~~---~--~~ 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 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: Metadata for Any Object
Hi,
2009/4/30 Stuart Sierra the.stuart.sie...@gmail.com:
On Apr 29, 5:58 pm, Stu Hood stuh...@gmail.com wrote:
Instead of attaching the metadata directly to the object, what if the
metadata was stored outside the object, in a global map of {object metadata,
...}? In order to handle garbage collection, something similar to Java's
WeakHashMap could be used, with the object itself as the key.
Interesting idea.
There might be performance penalities, depending on how often metadata
is used. Metadata guarantees atomic updates (alter-meta!) so the
WeakHashMap might need to be wrapped in a synchronized map, at a
further penalty.
I guess this would not be sufficient: WeakHashMap are not side-effect
free: they mutate every time one of their key is removed :
When a key has been discarded its entry is effectively removed from
the map, so this class behaves somewhat differently than other Map
implementations.
, making them improper to be used within STM transactions and such.
Regards,
--
Laurent
I've never needed metadata on non-Clojure types. Do you have a use in
mind?
This could be a library, too, sort of like:
(defn my-meta [object]
(if (instance? clojure.lang.IMeta object)
(meta object)
(*global-metadata* object)))
-SS
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Re: regex replace all?
Mark Derricutt wrote: Does clojure come with a built-in regex replace method? I see ones for re-split, re-seq etc. but nothing for a simple replace, I've been using: (defn replace-all [st reps] (reduce #(.replaceAll %1 (first %2) (second %2)) st reps)) There is re-gsub in clojure-contrib.str-utils. Regards, BG -- Baishampayan Ghose b.gh...@ocricket.com oCricket.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 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: update/update-in
I see what you mean, does seem like a useful addition:
(defn update [m k f args]
(assoc m k (apply f (k m) args)))
(update {:foo 0} :foo inc)
vs.
(assoc {:foo 0} :foo (inc (:foo {:foo 0})))
On Wed, Apr 29, 2009 at 7:13 PM, mifrai fraim...@gmail.com wrote:
Thanks for the quick reply and I understand that's the functionality
of it.
But just like get-in is the recursive form of get - I'm just wondering
why there's no singular form of update-in.
I know it's not much more work to go (update-in map [:single-key] conj
3) - but from experience there tends be really good reasons behind
these kinds of decisions and I'm just curious.
On Apr 29, 4:05 pm, David Nolen dnolen.li...@gmail.com wrote:
Because update-in can use any function to do the update.
On Wed, Apr 29, 2009 at 6:54 PM, mifrai fraim...@gmail.com wrote:
Hi,
I was wondering why there was no update to update-in? But there is
an assoc to assoc-in and a get to a get-in.
- Mike
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