Re: defrecord, equality, hashing, and performance
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Prismatic has some document for deftype/defrecord/map, hope it's useful to you: https://github.com/Prismatic/eng-practices/blob/master/clojure/20130926-data-representation.md On 06/12/2015 02:36 AM, Mars0i wrote: I think that the following is all correct, but I could be wrong about something. The datatypes page at clojure.org http://clojure.org/datatypes says: defrecord provides ... value-based equality and hashCode, while deftype does not. So (defrecord Rec [x]) (= (Rec. 42) (Rec. 42)) ;= true but (deftype Typ [x]) (= (Typ. 42) (Typ. 42)) ;= false. This also means, as I understand it, that data structures that use hashing--maps and sets, for example--hash on value for records, but on identity for types. I believe that the same is true when Java hashtables compare records, or compare types, although I haven't carefully tested this. It makes sense that the primary, most fully functional user-definable datatypes in Clojure should use value-based equality; that's fully in the spirit of a functional language, and is very convenient in many contexts, and hashing should follow the equality semantics of the datatypes. You can always use identical? if you want to test records for identity rather than equality. However, you can't tell maps and sets to use identity for records, afaik. This makes records undesirable if you only care about identity, and need to use a data structure that uses hashing, and care about performance, because value-based hashing is presumably a lot slower than identity-based hashing (which is what my experiments seem to show). On the other hand, records are obviously way, way, more convenient than types in many contexts because the functionality provided by deftype is so bare-bones. It really bothers me that I have to choose between speed and using convenient, idiomatic functionality (defrecord) that is one of several significant reasons that I love Clojure. (This is in an application in which value-based equality would /never/ be what I wanted for my datatypes.) Should there be an alternative? Either a way to define e.g. a special kind of set that uses identity rather than value for records, or a way to make records use identity for equality, or another datatype that's just like defrecord but ..., or a way to get more functionality with deftype, or ...? (I don't think that Clojure should include every option or functionality that someone thinks might be convenient in some context. Another reason that I love Clojure is that it /doesn't/ do that, but instead provides limited, well-thought out options that allow a lot of flexibility.) In an earlier thread https://groups.google.com/forum/#!topic/clojure/EdjnSxRkOPk, Stephen Yi pointed out that although you're allowed to override some Object methods in defrecord, you can't override Object.equals and Object.hashCode. It isn't documented, but the compiler throws an exception if you try it. That makes quite a bit of sense, since changing the meaning of equality for a datatype would be an easy way to introduce confusing bugs. On the other hand, if you do override Object.equals and Object.hashCode for defrecord, you probably know that you're doing something weird, and that you'd better take precautions, if necessary, to avoid later confusion. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com mailto:clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -BEGIN PGP SIGNATURE- Version: GnuPG v2 iQEcBAEBCAAGBQJVen1zAAoJEBnCozJnPTdiq6UH/3pKe17SGwNV0a/PajDOLbfe R86c/U0faXgtr4hL4IrhSEK9HWlGHWy8FHE57TYQstc8OSryJXsbNp3/OjpfIpfB QBpQwgBmwkrA/EkLJEmBsGu50R8nQgwLiG6S0T8gSFPUSM2NkQJyBkczTz0AVX7y bUjliAb3lGaWG8t4uJhPt0feq+acfpjR1bG5V6ckISFtcJW+N8aG0lQKkDmTqcQZ AppdpFrjiDw+SoyPcEB+vpRyQxwnxYk/g9qZHjEoFi7DG0e59gHFG19dLlXeH5Nv tKR6rRGXsJQROxdxGWNS2HYa4ASSJJd80reoehl341A2xZ0z46SASw51T2QqpZs= =3/P/ -END PGP SIGNATURE- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this
Re: CIDER 0.8.2 released!
Good Job, Bozhidar! I've already updated from MELPA. Everything works like a charm. On 12/21/2014 08:39 PM, Bruce Durling wrote: Thanks! cheers, Bruce On Sun, Dec 21, 2014 at 10:54 AM, Bozhidar Batsov bozhi...@batsov.com wrote: Ladies and gentlemen, I’m happy to inform you that CIDER 0.8.2 is out! It’s a bugfix-only release (which means you totally want to use it). Have a look at the release notes (https://github.com/clojure-emacs/cider/releases/tag/v0.8.2) for all the gory details. This will be the final release in the 0.8.x series (unless some terrible regression doesn’t pop up). There are no concrete plans for 0.9 yet, but I hope it will introduce some (or ideally all) of the following: * better cljs support * comint-based REPL buffers * boot support * better handling of multiple nREPL connections * and whatever else we manage to fit in :-) Please, report bugs and submit suggestions for improvements here https://github.com/clojure-emacs/cider/issues. If you like clojure-mode, CIDER and inf-clojure you can support their development via Gratipay https://gratipay.com/bbatsov/ P.S. In related news - squiggly-clojure (https://github.com/clojure-emacs/squiggly-clojure), a flycheck extension for CIDER is now an official clojure-emacs project. -- Cheers, Bozhidar -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [ANN] async-sockets - work with sockets using core.async channels
BTW, is there any network based core.async channel available now? On 10/08/2014 04:36 AM, adrian.med...@mail.yu.edu wrote: It's not about 'safety' (depending on what that means in this context), but as Zach pointed out, if you aren't careful about backpressure you can run into performance bottlenecks with unrestrained async IO operations because although they let you code as if you could handle an unlimited amount of connections, obviously that isn't true. There is only a finite amount of data that can be buffered in and out of any network according to its hardware. When you don't regulate that, your system will end up spending an inordinate amount of time compensating for this. You don't need to worry about this with regular io because the thread per connection abstraction effectively bounds your activity within the acceptable physical constraints of the server. On Tuesday, October 7, 2014 2:49:30 PM UTC-4, Brian Guthrie wrote: On Mon, Oct 6, 2014 at 12:10 AM, adrian...@mail.yu.edu javascript: wrote: Zach makes an excellent point; I've used AsyncSocketChannels and its irk (http://docs.oracle.com/javase/8/docs/api/java/nio/channels/AsynchronousServerSocketChannel.html http://docs.oracle.com/javase/8/docs/api/java/nio/channels/AsynchronousServerSocketChannel.html), with core.async in the past. Perhaps replacing your direct java.net.Sockets with nio classes that can be given CompletionHandlers (http://docs.oracle.com/javase/7/docs/api/java/nio/channels/CompletionHandler.html http://docs.oracle.com/javase/7/docs/api/java/nio/channels/CompletionHandler.html) would be a better fit. Once I do some performance instrumentation I'll give that a shot. I admit that I'm not familiar with all the implications of using the nio classes; were I to switch, is it safe to continue using go blocks, or is it worth explicitly allocating a single thread per socket? Brian -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com mailto:clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [ANN] Taoensso library updates / 2014 September
Good job! I will adapt Nippy 2.7.0 in my projects soon. On 09/02/2014 10:28 PM, Peter Taoussanis wrote: (All new releases are now on BreakVersioning, https://github.com/ptaoussanis/encore/blob/master/BREAK-VERSIONING.md). *Sente - v1.0.0 / 2014 Sep 2 (today)* *==* /Realtime web comms for Clojure/Script (think Socket.IO but with Transit core.async)./ https://github.com/ptaoussanis/sente/releases https://github.com/ptaoussanis/sente/releases Notable recent changes: v1 release, optional Transit support, efficiency improvements (perf+bandwidth). *Carmine - v2.7.0 / 2014 Aug 27 (-6days)* *==* /Clojure Redis client + message queue./ https://github.com/ptaoussanis/carmine/releases https://github.com/ptaoussanis/carmine/releases Notable recent changes: lock-free Apache Commons Pool 2 pooling, updated Redis commands. *Faraday - v1.5.0 / 2014 July 26 (-38days)* *==* /Clojure DynamoDB client./ https://github.com/ptaoussanis/faraday/releases https://github.com/ptaoussanis/faraday/releases Notable recent changes: allow reading of unserialized bin values written with other clients. *Nippy - v2.7.0-RC1 / 2014 Aug 27 (-6days)* *==* /High-performance Clojure binary serialization./ https://github.com/ptaoussanis/nippy/releases https://github.com/ptaoussanis/nippy/releases Notable recent changes: ~40% perf bump over v2.6.0, LZ4 compressor, id'd extension types, Fressian comparison benchmarks. *Timbre - v3.3.0 / 2014 May 8 (-4months)* *==* /Pure-Clojure logging + profiling./ https://github.com/ptaoussanis/timbre/releases https://github.com/ptaoussanis/timbre/releases Recent changes: some minor fixes, appender updates. *Tower - v3.0.0 / 2014 Aug 28 (-5days)* *==* /i18n and L10n library for Clojure./ https://github.com/ptaoussanis/tower/releases https://github.com/ptaoussanis/tower/releases Recent changes: final ClojureScript support, a bunch of general API improvements. *Touchstone - v2.0.2 / 2014 Mar 30 (-5months)* *==* /A/B testing for Clojure./ https://github.com/ptaoussanis/touchstone/releases https://github.com/ptaoussanis/touchstone/releases Recent changes: stable. *Encore - v1.7.3 / 2014 Sep 1 (yesterday)* *==* /General cross-platform Clojure/Script utils./ https://github.com/ptaoussanis/encore/releases Recent changes: nothing major- a few new utils, a few fixes. *Useful links* *==** * Libs on GitHub: https://github.com/ptaoussanis?tab=repositories https://github.com/ptaoussanis?tab=repositories Libs homepage: https://www.taoensso.com/clojure-libraries https://www.taoensso.com/clojure-libraries Twitter (lib announcements, etc.): https://twitter.com/ptaoussanis https://twitter.com/ptaoussanis As usual, please feel free to ping with any questions/problems/suggestions/whatever. Happy hacking/Tuesday, cheers! :-) -- *Peter Taoussanis *ptaoussanis at taoensso.com http://taoensso.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 --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com mailto:clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[ANN] Debug: clojure port of node debug
Hi all, I just ported node debug[1] library to clojure, hoping it could be helpful in clojure world. The debug library is widely used in node projects. The usage is very simple: print debug message when certain namespace is enabled via environment variable DEBUG. https://github.com/sunng87/debug The Clojure version of debug has almost all features of node one. And there are some advantages: * No need to configure module name since we have *ns* in clojure * Zero overhead in runtime if debug is disabled: the debug macro won't produce anything Compared with logging tools of clojure, the debug library is: * Much simpler, no xml or properties at all * Light weight, no additional dependencies [1] https://github.com/visionmedia/debug -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[ANN] RPC library Slacker and Slacker Cluster 0.12
Hello Everyone, I just released Slacker 0.12 and its cluster support module. In this release, several bugs got fixed and there are also lovely features added (nippy serialization, leader election, etc). For more detail, please move to the project pages: https://github.com/sunng87/slacker https://github.com/sunng87/slacker-cluster In case you have no idea about Slacker, it's a clojure library provides completely transparent experience on remote function call. And the cluster module supports large scale high availability architecture. The development of slacker was started in late 2011. Now it's used in avoscloud.com for backend service integration -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [ANN] Leiningen 2.4.0
I have been using lein-release
(https://github.com/relaynetwork/lein-release) for a while. It's surely
nice to see this feature built into core.
On Tue 10 Jun 2014 06:11:06 PM CST, Atamert Ölçgen wrote:
Thanks for bringing deploy-repositories to my attention, I didn't know
it was there.
On Tue, Jun 10, 2014 at 5:22 AM, Phil Hagelberg p...@hagelb.org
mailto:p...@hagelb.org wrote:
Greetings!
I'm pleased to announce the release of Leiningen 2.4.0, our most
significant release in quite some time. The star of the show is
the new
`release` task, which can automate all the common steps behind the
release of a new version of a library.
The idea is that `lein release` will run a series of tasks you've
specified as release steps. This defaults to running the equivalent of
these commands:
* lein vcs assert-committed
* lein change version leiningen.release/bump-version release
* lein vcs commit
* lein vcs tag
* lein deploy
* lein change version leiningen.release/bump-version patch
* lein vcs commit
* lein vcs push
The `vcs` and `change` tasks are also new. The `vcs` subtasks
above are
self-explanatory, but the `change` task allows for programmatic
modification of any given key in defproject using an arbitrary
function,
without altering formatting or comments. Out of the box we ship a
function to bump version numbers, but you can call functions from
plugins, and we hope to add more built-in functions in future
releases.
Note that the release task runs `lein deploy` rather than `lein deploy
clojars`; this is in order to prevent accidental deploys of private
artifacts to Clojars. In order to deploy an open source library to
Clojars it's necessary to add `:deploy-repositories {releases
:clojars}`
to your project.clj file.
Other highlights include fixes to the search task to report index
download progress, improved multi-field queries, and the default
to make
useful uberjars even when not AOTing a -main function.
A full list of significant changes:
* Allow aliases to splice in values from the project map. (Phil
Hagelberg)
* Allow plugins to override built-in tasks. (Phil Hagelberg)
* Add `release` task for automating common release steps. (Wayne
Warren, Chris Truter, Phil Hagelberg)
* Add `change` task for programmatc `project.clj` manipulation.
(Chris Truter, Max Barnash)
* Abort when `defproject` contains duplicate keys. (Peter Garbers)
* Add `vcs` task to automate version control. (Phil Hagelberg,
Wayne Warren)
* Automatically `clean` before `deploy` to avoid AOT in libraries.
(Phil Hagelberg)
* Emit warnings to stderr. (Andy Chambers)
* Use `clojure.main` for uberjars that don't declare their own
`:main`. (Phil Hagelberg)
* Allow templates to load from `:plugin-repositories`. (Phil
Hagelberg)
* Fix a race condition on printing during dependency resolution.
(Phil Hagelberg)
* Allow `new` templates to operate on existing directories with
`--force` option. (Matthew Blair)
* Fix `search` task to allow queries on multiple fields. (Colin Jones)
* Fix a bug where errors in `run` task were mis-reported. (Gary
Fredericks)
* Report download progress of search indices. (Matthew Blair)
* Protection from harmful `:clean-targets` settings. (Craig McDaniel)
* Faster loading of help text. (David Grayson, Ryan Mulligan)
* Add `LEIN_SILENT` option to suppress `*info*` output. (Phil
Hagelberg)
As usual, for those who manually installed `lein upgrade` will pull in
the latest, and `lein upgrade 2.3.4` will back it down to the previous
version if you run into any issues.
Thanks to all the contributors who made this happen!
-Phil
ps. The Clojars artifacts for this release are still pending
investigation of some deploy issues, but they should be right
around the
corner.
--
Kind Regards,
Atamert Ölçgen
-+-
--+
+++
www.muhuk.com http://www.muhuk.com
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Re: 求教：使用uberjar后，如何能覆盖log4j.properties
试试启动参数 -Dlog4j.configuration 什么的呢，你可以搜一下 On Tue 11 Mar 2014 11:16:13 PM CST, sonic pan wrote: 把项目用uberjar打包后，如何覆盖日志配置文件log4j.properties? 试了 java -cp resources -jar xxx.jar 貌似不能覆盖 -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com mailto:clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: compojure in production
Check out ring-jetty-adapter https://github.com/ring-clojure/ring/tree/master/ring-jetty-adapter The compojure app can be treated as a ring app. On Thu 20 Dec 2012 08:22:19 AM CST, Maris wrote: How can I run my compojure app without leiningen ? I want to use dedicated jetty server (not war file). -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Anonymous Macros
I'm afraid not. Macro should be bound on a var. The clojure compile checks an attribute (isMacro) on a var to determine if it's a macro or function. And Since a macro has no value, you cannot write it with some literals. On Wed 07 Nov 2012 08:16:42 AM CST, Sean Neilan wrote: Is there any way to write an anonymous macro in Clojure? This post: http://stackoverflow.com/questions/4074961/anonymous-macros-in-clojure says it's possible with some hacks and in version 1.3 Clojure will have some kind of support for this. Thank you for your time. -Sean -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: {ANN} ring.velocity: render apache velocity templates for ring in clojure.
enlive最大的好处是页面html页面不会掺入任何模板语言，直接就可以在浏览器里预览页面设计 但是用的时候思维确实和传统的模板引擎不太一样 On Wed 18 Jul 2012 12:50:39 PM CST, Shen, Feng wrote: 同感enlive较复杂。前段时间，转向了Mustache。 沈锋 美味书签 http://mei.fm On Wed, Jul 18, 2012 at 11:59 AM, dennis zhuang killme2...@gmail.com mailto:killme2...@gmail.com wrote: 其实就是几行代码封装下，我觉的velocity比什么enlive好用多了。 2012/7/18 Shen, Feng shen...@gmail.com mailto:shen...@gmail.com 不错不错。 velocity 在java中用得较广。 这样为potential 的 clojure用户铺了一下道路。 沈锋 美味书签 http://meiwei.fm http://mei.fm On Wed, Jul 18, 2012 at 12:00 AM, dennis zhuang killme2...@gmail.com mailto:killme2...@gmail.com wrote: A little error in getting started missing :age |(render test.vm :name dennis :age 29)| 2012/7/17 dennis zhuang killme2...@gmail.com mailto:killme2...@gmail.com Hi,all Apache velocity http://velocity.apache.org/is a great java template engine used widely. I want to use it in clojure with compojure and ring framework,so i've created this project---ring.velocity. Home: https://github.com/killme2008/ring.velocity Getting started: Adds dependency in leiningen project.clj: | [ring.velocity 0.1.0-SNAPSHOT] | Create a directory named |templates| in your project directory to keep all velocity templates. Create a template |templates/test.vm|: | hello,$name,your age is $age. | Use ring.velocity in your namespace: | (use '[ring.velocity.core :only [render]]) | Use |render| function to render template with vars: | (render test.vm :name dennis 29) | The |test.vm| will be interpreted equals to: | hello,dennis,your age is 29. | Use ring.velocity in compojure: | (defroutes app-routes (GET / [] (render test.vm :name dennis :age 29)) (route/not-found Not Found)) | Use ring.velocity in ring: | (use '[ring.util.response]) (response (render test.vm :name dennis :age 29)) | Custom velocity properties,just put a file named |ring-velocity.properties| to your classpath or resource paths.The default velocity properties is in src/default/velocity.properties https://github.com/killme2008/ring.velocity/blob/master/src/default/velocity.properties. -- 庄晓丹 Email: killme2...@gmail.com mailto:killme2...@gmail.com xzhu...@avos.com mailto:xzhu...@avos.com Site: http://fnil.net http://fnil.net Twitter: @killme2008 -- 庄晓丹 Email: killme2...@gmail.com mailto:killme2...@gmail.com xzhu...@avos.com mailto:xzhu...@avos.com Site: http://fnil.net http://fnil.net Twitter: @killme2008 -- 庄晓丹 Email: killme2...@gmail.com mailto:killme2...@gmail.com xzhu...@avos.com mailto:xzhu...@avos.com Site: http://fnil.net http://fnil.net Twitter: @killme2008 -- 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: How to convert a python list to clojure?
Take a look at my pyclj library, which could dump/loads clojure literal to python data structures. https://github.com/sunng87/pyclj You can dump you cc and use read-string to load it into clojure. import clj print clj.dumps(cc) On 06/24/2012 06:05 PM, Antonio Recio wrote: I have this list in python: cc = list() for i in range(256): cc.append(ctf.GetColor(float(i) / 255.0)) And I would know if this is correct conversion in clojure? (def cc [(for [i (range 256)] (.. ctf GetColor (/ i 255.0)))]) -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Clojure job scheduler
By the way, overtone has made a simple library for scheduled task. You may take a look: https://github.com/overtone/at-at On Mon 11 Jun 2012 04:31:41 PM CST, Joao_Salcedo wrote: hi Trevor could you share how did you solve the issue. I would like to learn more about it. If you can share your solution would be great On Saturday, January 8, 2011 4:13:17 AM UTC+11, Trevor wrote: What's the best way to kick off Clojure code at scheduled times? I have some that would run once a day. Some that might run 2 or 3 times a day based upon a test being met. 1. I could write a function that sleeps an interval, check the time differential to perform a time-box triggered function, but would that consume too much memory?, cause long term problems? 2. I could use quartz, but that seems like overkill. 3. I could set a job-schedule using the OS to run a clojure script. I'd rather not, I would like to do things like send emails / check status via web app (making option 1 more appealing). I'm looking for input/guidance. What are your experiences? 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 -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: [ANN] Leiningen 2.0.0-preview5 released
I'm running preview5 on OpenJDK 7, also got this issue both when upgrade and self-install. On 06/01/2012 02:40 PM, mnicky wrote: After upgrade from preview4 and installation of OpenJDK, 'lein2 repl' worked exactly once. Since then, it fails with: Exception in thread main java.lang.ExceptionInInitializerError at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:247) at clojure.lang.RT.loadClassForName(RT.java:2056) at clojure.lang.RT.load(RT.java:419) at clojure.lang.RT.load(RT.java:400) at clojure.core$load$fn__4890.invoke(core.clj:5415) at clojure.core$load.doInvoke(core.clj:5414) at clojure.lang.RestFn.invoke(RestFn.java:408) at clojure.core$load_one.invoke(core.clj:5227) at clojure.core$load_lib.doInvoke(core.clj:5264) at clojure.lang.RestFn.applyTo(RestFn.java:142) at clojure.core$apply.invoke(core.clj:603) at clojure.core$load_libs.doInvoke(core.clj:5298) at clojure.lang.RestFn.applyTo(RestFn.java:137) at clojure.core$apply.invoke(core.clj:603) at clojure.core$require.doInvoke(core.clj:5381) at clojure.lang.RestFn.invoke(RestFn.java:436) at reply.reader.jline$loading__4784__auto__.invoke(jline.clj:1) at reply.reader.jline__init.load(Unknown Source) at reply.reader.jline__init.clinit(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:247) at clojure.lang.RT.loadClassForName(RT.java:2056) at clojure.lang.RT.load(RT.java:419) at clojure.lang.RT.load(RT.java:400) at clojure.core$load$fn__4890.invoke(core.clj:5415) at clojure.core$load.doInvoke(core.clj:5414) at clojure.lang.RestFn.invoke(RestFn.java:408) at clojure.core$load_one.invoke(core.clj:5227) at clojure.core$load_lib.doInvoke(core.clj:5264) at clojure.lang.RestFn.applyTo(RestFn.java:142) at clojure.core$apply.invoke(core.clj:603) at clojure.core$load_libs.doInvoke(core.clj:5298) at clojure.lang.RestFn.applyTo(RestFn.java:137) at clojure.core$apply.invoke(core.clj:603) at clojure.core$require.doInvoke(core.clj:5381) at clojure.lang.RestFn.invoke(RestFn.java:805) at reply.eval_modes.nrepl$loading__4784__auto__.invoke(nrepl.clj:1) at reply.eval_modes.nrepl__init.load(Unknown Source) at reply.eval_modes.nrepl__init.clinit(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:247) at clojure.lang.RT.loadClassForName(RT.java:2056) at clojure.lang.RT.load(RT.java:419) at clojure.lang.RT.load(RT.java:400) at clojure.core$load$fn__4890.invoke(core.clj:5415) at clojure.core$load.doInvoke(core.clj:5414) at clojure.lang.RestFn.invoke(RestFn.java:408) at clojure.core$load_one.invoke(core.clj:5227) at clojure.core$load_lib.doInvoke(core.clj:5264) at clojure.lang.RestFn.applyTo(RestFn.java:142) at clojure.core$apply.invoke(core.clj:603) at clojure.core$load_libs.doInvoke(core.clj:5298) at clojure.lang.RestFn.applyTo(RestFn.java:137) at clojure.core$apply.invoke(core.clj:603) at clojure.core$require.doInvoke(core.clj:5381) at clojure.lang.RestFn.invoke(RestFn.java:703) at reply.main$loading__4784__auto__.invoke(main.clj:1) at reply.main__init.load(Unknown Source) at reply.main__init.clinit(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:247) at clojure.lang.RT.loadClassForName(RT.java:2056) at clojure.lang.RT.load(RT.java:419) at clojure.lang.RT.load(RT.java:400) at clojure.core$load$fn__4890.invoke(core.clj:5415) at clojure.core$load.doInvoke(core.clj:5414) at clojure.lang.RestFn.invoke(RestFn.java:408) at clojure.core$load_one.invoke(core.clj:5227) at clojure.core$load_lib.doInvoke(core.clj:5264) at clojure.lang.RestFn.applyTo(RestFn.java:142) at clojure.core$apply.invoke(core.clj:603) at clojure.core$load_libs.doInvoke(core.clj:5298) at clojure.lang.RestFn.applyTo(RestFn.java:137) at clojure.core$apply.invoke(core.clj:603) at clojure.core$require.doInvoke(core.clj:5381) at clojure.lang.RestFn.invoke(RestFn.java:1096) at leiningen.repl$loading__4784__auto__.invoke(repl.clj:1) at leiningen.repl__init.load(Unknown Source) at leiningen.repl__init.clinit(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:247) at clojure.lang.RT.loadClassForName(RT.java:2056) at clojure.lang.RT.load(RT.java:419) at clojure.lang.RT.load(RT.java:400) at clojure.core$load$fn__4890.invoke(core.clj:5415) at clojure.core$load.doInvoke(core.clj:5414) at clojure.lang.RestFn.invoke(RestFn.java:408) at clojure.core$load_one.invoke(core.clj:5227) at clojure.core$load_lib.doInvoke(core.clj:5264) at clojure.lang.RestFn.applyTo(RestFn.java:142) at clojure.core$apply.invoke(core.clj:603) at clojure.core$load_libs.doInvoke(core.clj:5298) at clojure.lang.RestFn.applyTo(RestFn.java:137) at clojure.core$apply.invoke(core.clj:603) at clojure.core$require.doInvoke(core.clj:5381) at clojure.lang.RestFn.invoke(RestFn.java:408) at leiningen.core.main$resolve_task.invoke(main.clj:65) at leiningen.core.main$resolve_task.invoke(main.clj:73) at leiningen.core.main$apply_task.invoke(main.clj:84)
Re: ANN factual-clojure-driver 1.3.1, Factual's officially supported Clojure driver
Awesome geo-data service! Can't wait to try out your APIs. On 06/01/2012 10:33 AM, dirtyvagabond wrote: factual-clojure-driver is Factual's officially supported Clojure driver: https://github.com/Factual/factual-clojure-driver Version 1.3.1 has been upgraded to support the latest API feature set: * Core: Find places around a given geocode, filter by any combination of attributes, and conduct full-text searches across all attributes * Places Crosswalk - Lookup places and business entities across 40+ services including Facebook, Foursquare, Yelp, and Twitter * Resolve: Enrich, augment and de-dupe existing datasets * Geopulse: Low-latency location data for geotargeting * Reverse Geocoder: Convert coordinates into addresses -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Socket Library in Clojure
Take a look at aleph: https://github.com/ztellman/aleph Aleph is a high-level library for event-driven network programming. On 04/27/2012 06:12 PM, Murtaza Husain wrote: Hi, I was looking for socket libraries in clojure. The requirement is to connect via telnet to a mainframe based system and run commands on it. Thanks, Murtaza -- 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 -- Sun Ning Software developer Nanjing, China (N32°3'42'' E118°46'40'') http://about.me/sunng/bio -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
[ANN] slacker (RPC framework) 0.8.0 released
Hi all, Glad to announce the new release of slacker, an RPC framework for clojure: https://github.com/sunng87/slacker Major changes in this release: * clojure 1.3 compatible * performance boost: 8x faster than previous release * ring app wrapper: slacker can be wrapped as a ring app If you have any question about slacker, feel free to drop me an email. -- Sun Ning Software developer Nanjing, China (N32°3'42'' E118°46'40'') http://about.me/sunng/bio -- 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 advice for translating the book The Joy of Clojure?
I don't think the book is an open source one, so you should have to find a publisher in China first. And ask them to contact Manning for the importing details. On Apr 23, 2012 1:59 AM, Zhitong He hez...@gmail.com wrote: BTW, is there any way to get the book's source code (latex or other)? so that I can do a fully translation, with the right typesetting, etc. I will try to publish the book translated if chances, and contribute all the remuneration (if any) to the Clojure community. I would like to know if this will be an act of tort, thank you. On Monday, April 23, 2012 1:40:24 AM UTC+8, Zhitong He wrote: Hi, all. I am new to Clojure and feel exciting playing with it. Recently, I read the book The Joy of Clojure, and got a strong feeling toward translating the book from English to Chinese, to introduce Clojure to more programmers in China. Actually I am working now. However, though having some experience in translating blog articles, I have never translate a real book, any advice about organization tools? Thank you. -- Zhitong He Sun Yat-sen University -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: [ANN] lein-deps-tree 0.1.0
lein2 has a built-in command: `lein deps :tree` for this task it would be great to have the plugin in lein 1.x But I got error below: Exception in thread main java.io.FileNotFoundException: Could not locate leiningen/core/classpath__init.class or leiningen/core/classpath.clj on classpath: (deps_tree.clj:1) On Mon 02 Apr 2012 08:39:34 PM CST, Moritz Ulrich wrote: I'm happy to announce the first release of lein-deps-tree[1]. It's a leiningen plugin which prints the all dependencies of a project as a nicely formatted tree. Please report any issues (especially with leiningen 1.x) as Github issues. [1]: https://github.com/the-kenny/lein-deps-tree Cheers, Moritz -- Sun Ning Software developer Nanjing, China (N32°3'42'' E118°46'40'') http://about.me/sunng/bio -- 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: Cheap way to find function (defn) name using a macro?
Since you want to use the plain defn, what about thinking in a different way ? Write a macro like `with-function-name`, wraps the function call instead of the function definition. (defmacro with-function-name [fn-name args] ...) In clojure, because you can assign function to a var at any time. So the wrapped defn could not always work. For example: (defn* plus [a b] ...) (def plus-alias plus) Then you will call plus-alias but got the name as plus. I know this is a special case, but it's actually there. On 03/28/2012 11:02 PM, Shantanu Kumar wrote: Hi, Is it possible to write a macro that when used in a top-level function (created using defn) can find out the name of the immediate top-level function? I know *ns* returns the namespace and it's possible to walk the current thread's stack trace to find out the function name, but I am looking for a computationally cheap way to do it. Thanks, Shantanu -- Sun Ning Software developer Nanjing, China (N32°3'42'' E118°46'40'') http://about.me/sunng/bio -- 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: Parallel SSH and system monitoring in Clojure
You might interested in clojure-control[1], which has similar functionality to your library. [1] https://github.com/killme2008/clojure-control On 03/16/2012 06:12 AM, Chris McBride wrote: Hi, I releases two simple clojure libraries to help running commands via SSH on multiple servers. Hopefully someone will find it useful. http://info.rjmetrics.com/blog/bid/54114/Parallel-SSH-and-system-monitoring-in-Clojure https://github.com/RJMetrics/Parallel-SSH https://github.com/RJMetrics/Server-Stats Best, Chris McBride -- Sun Ning Software developer Nanjing, China (N32°3'42'' E118°46'40'') http://about.me/sunng/bio -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
[ANN] slacker 0.6.1 released
Hi all, Slacker 0.6.1 has been pushed to clojars. Slacker is an RPC framework designed for clojure. In 0.6.1, HA cluster coordinated by zookeeper is just supported. https://github.com/sunng87/slacker -- Sun Ning Software developer Nanjing, China (N32°3'42'' E118°46'40'') http://about.me/sunng/bio -- 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: Contrib for Clojure 1.3
As the wiki says, there is an unofficial branch of contrib compiled against 1.3 https://github.com/arohner/clojure-contrib/tree/1.3-compat On 01/31/2012 09:22 AM, kohyama wrote: Dear Sirs and Madams I'm going to use clojure 1.3. What should we do, when we're trying to do things like we've been doing with clojure 1.2 and contrib 1.2? Such as things with contrib.io, contrib.duck-stream, contrib.string. For example, to get lines in a file as a list of strings and do some modification for each line, I've been doing: (map /some-modification/ (clojure.contrib.duck-streams/read-lines /a-path-name/)) . 1) Use other functions using *in* in clojure 1.3, with binding *in* to a file reader. 2) Use the contrib1.2 compiled for clojure 1.3. 3) Use other libraries derived from contrib 1.2. When we're trying to port large sources of clojure 1.2 for clojure 1.3, I guess we should take 2). But I want to know what should we do with new developments after now. Best regards, Yoshinori Kohyama (@kohyama https://twitter.com/#%21/kohyama) -- 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 -- Sun Ning Software developer Nanjing, China (N32°3'42'' E118°46'40'') http://about.me/sunng/bio -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
[ANN] slacker (Clojure RPC framework) 0.3.0 released
Hi all, I have released my clojure RPC framework, slacker, 0.3.0 to clojars. Server interceptor is supported in this version, you can now add custom function to slacker server like logging, statistics. More detail about the interceptor framework is here: https://github.com/sunng87/slacker/wiki/Interceptors For those not aware of slacker, it's a RPC framework built by clojure and for clojure. It has some advantages over existed solutions: * it uses direct function call instead of eval, which is faster and securer * it serialize data to binary format instead using prn/read, which is faster and compacter Also the client API is designed to be non-invasive. You will use slacker RPC just like calling the function from the same process. You can find the project on github: https://github.com/sunng87/slacker Any suggestions are always welcomed. -- Sun Ning Software developer Nanjing, China (N32°3'42'' E118°46'40'') http://about.me/sunng/bio -- 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
How to refer to nodejs Buffer in clojurescript ?
Hi, all I'm trying to use clojurescript compiled to nodejs. I ran into a problem with nodejs Buffer class, which doesn't have a namespace. I tried different ways to refer Buffer: (def b (Buffer. 1)) compiled to: b = new mynamespace.Buffer(1) this leads to an undefined error on runtime If I use it under cljs.nodejs namespace (require cljs.nodejs :as node) (def b (node/Buffer. 1)) it will be compiled to: b = new cljs.nodejs.Buffer(1) But still got error because I didn't see Buffer registered into cljs.nodejs like process or other module. So how can I refer to such nodejs class like Buffer which doesn't have a namespace ? -- Sun Ning Software developer Nanjing, China (N32°3'42'' E118°46'40'') http://about.me/sunng/bio -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
[ANN] slacker 0.1.0: RPC by clojure and for clojure
Glad to announse the first release of slacker. Slacker is an RPC framework for clojure. It provides a set of non-invasive, transparent APIs for both server and client. You can switch between remote invocation and local invocation effectivly. Different from remote eval approach, slacker is faster and securer because you only expose what you like to (all public functions under a namespace). Currently, slacker runs on aleph(transport) and carbonite(serialization). The 0.1.0 has been pushed to clojars. [info.sunng/slacker 0.1.0] You can find the project on github. There are some examples. https://github.com/sunng87/slacker If you have any suggestion about this project, feel free to get connected with github or from this mailing list. Enjoy. -- Sun Ning Software developer Nanjing, China (N32°3'42'' E118°46'40'') http://about.me/sunng/bio -- 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
