Re: Clojure-in-CommonLisp?
On 15 nov. 2011, at 17:00, David Nolen wrote: Integrating with C / C++ is also possible with ClojureScript + (V8 or Node.js) as well. I never looked at those options. Is it possible to manipulate C/C++ data directly from ClojureScript, without bulky wrapper objects? That's what I care most about. I'd have to be able to iterate over a huge C array (say, 500 MB of floats) without converting that array to some high-level sequence object first, and ideally feeding each float to a Clojure function compiled to something that processes C floats, rather than converting each float to some high-level object. Konrad. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Clojure-in-CommonLisp?
On 15 nov. 2011, at 18:21, Marshall T. Vandegrift wrote: Integrating the JVM with C via JNA [1] is pretty straightforward. I've been doing all my JNA glue in Java so far because JNA depends on a few features which aren't available / convenient use in Clojure [2], but a decent Clojure wrapper API probably wouldn't be too difficult. It's not too hard for the programmer, but 1) it is often impossible to avoid copying data and 2) deployment for the user becomes much more difficult than pure JVM or pure native code. Konrad. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Clojure-in-CommonLisp?
On 15 nov. 2011, at 17:17, Roy Lowrance wrote: What not create a C implementation in which the hosted language is dynamic link libraries? Fine with me, but that sounds like a huge effort. Konrad. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Overused phrases in the Clojure community
I am not sure if the OP was serious or not, but I think the desire to do things idiomatically is just one indicator of the quality of this community. I am encouraged, and challenged to learn how to use Clojure rather than bash Clojure to fit the holes/shapes I think I have. soapboxToo many times I see (and admittedly do) google-paste coding where developers need to get something done, so google it, copy the relevant fragment and shove it in their code without any appreciation for what it does or whether it is the right way./soapbox Including the word idiomatic in your post is er, well, er, idiomatic posting to the Clojure group :) (grammar not withstanding) On 16 November 2011 07:01, Ben Smith-Mannschott bsmith.o...@gmail.comwrote: On Wed, Nov 16, 2011 at 02:16, thenwithexpandedwingshesteershisflight mathn...@gmail.com wrote: Can we please get bored of saying idiomatic and in particular please ? It's quite useful to be able to talk about the-way-of-expressing-this-concept-most-in-keeping-with-established-practice (idiomatic), particularly when a language still sees plenty of newcomers. The Python community, found a way around the problem you seem to be having by inventing their own word: pythonic. Do I hear any votes for clojuresque? Ok, I think I've spent my smart-a$$ quota for the day, Ben -- 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
clj-time and clojure 1.3
Just curious what happened with getwoven and clj-time. It seems that Sean has updated clj-time over on Clojars and this version works fine under 1.3. If you search on clj-time though you get links to a getwoven project. https://github.com/getwoven/clj-time/ with 404s. This is the one I originally used. Now when I search github I see https://github.com/KirinDave/clj-time. Just wondering what is happening and where the appropriate project is? -- 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-in-CommonLisp?
On 15 Nov, 16:58, Konrad Hinsen googlegro...@khinsen.fastmail.net wrote: On 15 Nov, 2011, at 15:46 , Doug South wrote: I know a little CL and even less of Clojure, but wouldn't Clojure in CL be fairly trivial? Just a DSL in CL? All of Clojure's persistent data structures would have to be implemented in CL. Plus multimethods, protocols, and deftype, which are a bit different from their closest equivalents in CL. For some of the data structures, it might be possible to leverage the FSet library by Scott Burson, which provides persistent seqs, sets, and maps. The closest way to multimethods requires hacking the CLOS implementation, but in my opinion it's not hard to do (I know I'll write a blog post someday about my thoughts on this...), though maintaining all the caches that are in effect for class-based dispatch is not feasible in general for other types of dispatch. Certainly, though, this would step out of portable Common Lisp. The alternative is to effectively reimplement a part of CLOS in an incompatible way... Protocols and deftype I do not know... also there's the issue of arithmetic in 1.3+ which has different semantics than CL, different calling conventions... it would be more than just a DSL over CL, I fear. Alessio -- 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
adding metadata to java objects
Hi, I would like to be able to add metadata to arbitrary java objects that have already been instantiated. I know that you can use proxy to add metadata to objects that you create but in my case the object already exists (i.e. it is returned from another method call outside of my control). It seems like the best solution would be to create a delegate class/object that wraps the original one. Being able to write something like this would be ideal: (defn wrap-with-meta ([obj] (wrap-with-meta obj nil)) ([obj meta] (delegate obj clojure.lang.IObj (withMeta [this new-meta] (wrap-with-meta obj new-meta)) (meta [this] meta The delegate function would operate very similar to proxy, but instead of taking a class it takes an object. A class would be created that extends the object's class, just like a class is generated for proxy. However, instead of stubs being generated that call super the stubs would delegate to the given object. (Also note, I am also using reify-like syntax since I prefer that to the syntax in proxy.) I'm curious to hear people's thoughts on this approach. I'd also be really interested to see how other people have addressed this in the past (I doubt I'm the first one to run into this). I know that clojure mentality is to avoid wrappers, but I don't see this as being much different than what proxy already does. Of course, I may be missing something... if so, please enlighten me. :) Thanks, Ben -- 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
Incanter Hack Day, London, Sunday
Hi, There is an Incanter Hack Day taking place on Sunday at the Royal Festival Hall in London. We'll be on the 5th floor, Green side. The group will begin turning up at 1000, but feel free to come a bit later if that's too early. We'll go for some lunch somewhere close by on Southbank when everyone gets hungry, then come back for a few more hours hacking in the afternoon. We tend to finish about 1600 or a bit later. It's very laid-back and informal, and we try to be accessible to interested developers of all levels. Feel free to bring Incanter tasks to hack on (but we always have a stock of open tasks if people need something to work on). These are regular, monthly events - every 3rd Sunday of the month. Upcoming dates are: 20th November 18th December 15th January Hope to see you on Sunday! Thanks, Ben -- 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
Using clojure.java.shell for long running tasks
How can I get clojure.java.shell/sh to print to stdout while running? Currently, it waits until `sh` returns before I can access :out and println it. (:use clojure.java.shell) (defn call-maven [ args] (apply sh mvn args)) (defn maven-version [] (- -v call-maven :out println)) Thanks for you help! -- 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: adding metadata to java objects
On Wed, Nov 16, 2011 at 17:28, Ben Mabey b...@benmabey.com wrote:
Hi,
I would like to be able to add metadata to arbitrary java objects that have
already been instantiated. I know that you can use proxy to add metadata to
objects that you create but in my case the object already exists (i.e. it is
returned from another method call outside of my control).
It seems like the best solution would be to create a delegate class/object
that wraps the original one. Being able to write something like this would
be ideal:
(defn wrap-with-meta
([obj]
(wrap-with-meta obj nil))
([obj meta]
(delegate obj
clojure.lang.IObj
(withMeta [this new-meta] (wrap-with-meta obj
new-meta))
(meta [this] meta
The delegate function would operate very similar to proxy, but instead of
taking a class it takes an object. A class would be created that extends
the object's class, just like a class is generated for proxy. However,
instead of stubs being generated that call super the stubs would delegate to
the given object. (Also note, I am also using reify-like syntax since I
prefer that to the syntax in proxy.)
I'm curious to hear people's thoughts on this approach. I'd also be really
interested to see how other people have addressed this in the past (I doubt
I'm the first one to run into this).
I know that clojure mentality is to avoid wrappers, but I don't see this as
being much different than what proxy already does. Of course, I may be
missing something... if so, please enlighten me. :)
Thanks,
Ben
Here's an approach that may be of use: don't store the metadata in a
Map instead of decorating the Object with it. This map should use
object identity, not equality and should hold its keys weakly so that
it prevent collection of objects that otherwise would be garbage.
Safe to use concurrently would also be a plus. Conveniently, Google's
Guava library provides such a thing. Here's a sketch:
== project.clj
(defproject pojometa 0.0.1-SNAPSHOT
:dependencies [[org.clojure/clojure 1.3.0]
[com.google.guava/guava 10.0.1]])
== src/pojometa/core.clj ==
(ns pojometa.core
(:import [com.google.common.collect MapMaker]))
(def meta-map
(- (MapMaker.) .weakKeys .makeMap))
(defn meta* [o]
(if (instance? clojure.lang.IMeta o)
(clojure.core/meta o)
(.get meta-map o)))
(defn with-meta* [o m]
(if (instance? clojure.lang.IMeta o)
(clojure.core/with-meta o m)
(do (.put meta-map o m)
o)))
== usage ==
pojometa.core= (def o (Object.)) ;; arbitrary java object
pojometa.core= (meta* (with-meta* o {:foo true}))
{:foo true}
;; also does the right thing for Clojure types that
;; already know how to have metadata.
pojometa.core= (meta* (with-meta* {} {:bar 1}))
{:bar 1}
== END
Hope that helps,
Ben
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Re: Using clojure.java.shell for long running tasks
On Wed, Nov 16, 2011 at 11:48 AM, Matthew Boston matthew.bos...@gmail.com wrote: How can I get clojure.java.shell/sh to print to stdout while running? Currently, it waits until `sh` returns before I can access :out and println it. I actually had to stop using clojure.java.shell/sh for this and just used Runtime/exec directly precisely for this reason: https://github.com/technomancy/leiningen/blob/master/src/leiningen/compile.clj#L171 I could clean this up and submit it as a patch upstream if it's desired. Though on the other hand, the raw Runtime calls are not horribly cumbersome. -Phil -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
start-process-shell-command: Spawning child process: invalid argument
Having trouble setting up Clojure/Emacs on Windows again. Earlier Mark Rathwell helped mehttps://groups.google.com/d/topic/leiningen/JpkUXTLqnrE/discussionby pointing out a recipe for Windows http://sourceforge.net/apps/wordpress/codesounding/2011/09/29/installing-emacs-24-and-clojure-mode-on-windows-7-step-by-step/that resolved an issue with sh. After having the setup work for a while, I botched something while trying to upgrade clojure-mode. So I tried to start from scratch using the same recipehttp://sourceforge.net/apps/wordpress/codesounding/2011/09/29/installing-emacs-24-and-clojure-mode-on-windows-7-step-by-step/and now I see this when I try M-x clojure-jack-in start-process-shell-command: Spawning child process: invalid argument Other notes: - The value of inferior-lisp-program is lein repl. - If I start eshell and type lein repl, I see a repl start up. - If I start eshell and type sh and answer the prompt with lein repl, I also see a repl start up. - lein is in my windows path - c:/emacs and c:/emacs/bin are both in my path so sh.bat can be found - the swank-clojure 1.3.3 plugin is installed How do I find out what the invalid argument is? -- 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: adding metadata to java objects
On Nov 16, 11:53 am, Ben Smith-Mannschott bsmith.o...@gmail.com
wrote:
On Wed, Nov 16, 2011 at 17:28, Ben Mabey b...@benmabey.com wrote:
Hi,
I would like to be able to add metadata to arbitrary java objects that have
already been instantiated. I know that you can use proxy to add metadata to
objects that you create but in my case the object already exists (i.e. it is
returned from another method call outside of my control).
It seems like the best solution would be to create a delegate class/object
that wraps the original one. Being able to write something like this would
be ideal:
(defn wrap-with-meta
([obj]
(wrap-with-meta obj nil))
([obj meta]
(delegate obj
clojure.lang.IObj
(withMeta [this new-meta] (wrap-with-meta obj
new-meta))
(meta [this] meta
The delegate function would operate very similar to proxy, but instead of
taking a class it takes an object. A class would be created that extends
the object's class, just like a class is generated for proxy. However,
instead of stubs being generated that call super the stubs would delegate to
the given object. (Also note, I am also using reify-like syntax since I
prefer that to the syntax in proxy.)
I'm curious to hear people's thoughts on this approach. I'd also be really
interested to see how other people have addressed this in the past (I doubt
I'm the first one to run into this).
I know that clojure mentality is to avoid wrappers, but I don't see this as
being much different than what proxy already does. Of course, I may be
missing something... if so, please enlighten me. :)
Thanks,
Ben
Here's an approach that may be of use: don't store the metadata in a
Map instead of decorating the Object with it. This map should use
object identity, not equality and should hold its keys weakly so that
it prevent collection of objects that otherwise would be garbage.
Safe to use concurrently would also be a plus. Conveniently, Google's
Guava library provides such a thing. Here's a sketch:
== project.clj
(defproject pojometa 0.0.1-SNAPSHOT
:dependencies [[org.clojure/clojure 1.3.0]
[com.google.guava/guava 10.0.1]])
== src/pojometa/core.clj ==
(ns pojometa.core
(:import [com.google.common.collect MapMaker]))
(def meta-map
(- (MapMaker.) .weakKeys .makeMap))
(defn meta* [o]
(if (instance? clojure.lang.IMeta o)
(clojure.core/meta o)
(.get meta-map o)))
(defn with-meta* [o m]
(if (instance? clojure.lang.IMeta o)
(clojure.core/with-meta o m)
(do (.put meta-map o m)
o)))
== usage ==
pojometa.core= (def o (Object.)) ;; arbitrary java object
pojometa.core= (meta* (with-meta* o {:foo true}))
{:foo true}
;; also does the right thing for Clojure types that
;; already know how to have metadata.
pojometa.core= (meta* (with-meta* {} {:bar 1}))
{:bar 1}
(def o (Object.))
(def om (with-meta* o {:foo true}))
(def whatever (with-meta* o {:foo false}))
(meta* om) ;= {:foo false}
Doesn't really support Clojure's concept of metadata if it's shared
global mutable state.
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Re: Using clojure.java.shell for long running tasks
Thanks, Phil. Works like a charm! BTW, I'm working on the lein-mvn plugin which allows the use of maven plugins inside leiningen projects. On Nov 16, 2:53 pm, Phil Hagelberg p...@hagelb.org wrote: On Wed, Nov 16, 2011 at 11:48 AM, Matthew Boston matthew.bos...@gmail.com wrote: How can I get clojure.java.shell/sh to print to stdout while running? Currently, it waits until `sh` returns before I can access :out and println it. I actually had to stop using clojure.java.shell/sh for this and just used Runtime/exec directly precisely for this reason: https://github.com/technomancy/leiningen/blob/master/src/leiningen/co... I could clean this up and submit it as a patch upstream if it's desired. Though on the other hand, the raw Runtime calls are not horribly cumbersome. -Phil -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Using clojure.java.shell for long running tasks
On Wed, Nov 16, 2011 at 1:59 PM, Matthew Boston matthew.bos...@gmail.com wrote: Thanks, Phil. Works like a charm! BTW, I'm working on the lein-mvn plugin which allows the use of maven plugins inside leiningen projects. Great; looking forward to 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 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: Incanter Hack Day, London, Sunday
Looking forward to it. I'll be there. On Wed, Nov 16, 2011 at 18:39, Ben Evans benjamin.john.ev...@gmail.com wrote: Hi, There is an Incanter Hack Day taking place on Sunday at the Royal Festival Hall in London. We'll be on the 5th floor, Green side. -- 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: Using clojure.java.shell for long running tasks
I took a slightly different approach to this, in pallet.shell, and added an :async flag that returns the streams and the process https://github.com/pallet/pallet/blob/master/src/pallet/shell.clj -- 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: Overused phrases in the Clojure community
While I hope this thread dies a quick death, I'd like to offer the words 'properly' and 'well' as sometimes effective substitutes for 'idiomatically'. I am always interested in understanding how programming challenges can be addressed idiomatically, properly, and well, though I'm unlikely to have anything of value to add to the conversation. If however someone were after how to use Clojure idiotamically, I've got plenty to contribute! :) On Thu, Nov 17, 2011 at 12:20 AM, Colin Yates colin.ya...@gmail.com wrote: I am not sure if the OP was serious or not, but I think the desire to do things idiomatically is just one indicator of the quality of this community. I am encouraged, and challenged to learn how to use Clojure rather than bash Clojure to fit the holes/shapes I think I have. soapboxToo many times I see (and admittedly do) google-paste coding where developers need to get something done, so google it, copy the relevant fragment and shove it in their code without any appreciation for what it does or whether it is the right way./soapbox Including the word idiomatic in your post is er, well, er, idiomatic posting to the Clojure group :) (grammar not withstanding) On 16 November 2011 07:01, Ben Smith-Mannschott bsmith.o...@gmail.comwrote: On Wed, Nov 16, 2011 at 02:16, thenwithexpandedwingshesteershisflight mathn...@gmail.com wrote: Can we please get bored of saying idiomatic and in particular please ? It's quite useful to be able to talk about the-way-of-expressing-this-concept-most-in-keeping-with-established-practice (idiomatic), particularly when a language still sees plenty of newcomers. The Python community, found a way around the problem you seem to be having by inventing their own word: pythonic. Do I hear any votes for clojuresque? Ok, I think I've spent my smart-a$$ quota for the day, Ben -- 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 -- 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: start-process-shell-command: Spawning child process: invalid argument
Andrew, I don't have access to a Windows machine at the moment, but sidestepping clojure-jack-in for a minute, does using 'lein swank' and M-x slime-connect work? (in an eshell buffer that is in the project directory, run 'lein swank', that should start a swank server on port 4005, then M-x slime-connect should connect you and give you a repl). - Mark On Wed, Nov 16, 2011 at 4:15 PM, Andrew ache...@gmail.com wrote: Having trouble setting up Clojure/Emacs on Windows again. Earlier Mark Rathwell helped me by pointing out a recipe for Windows that resolved an issue with sh. After having the setup work for a while, I botched something while trying to upgrade clojure-mode. So I tried to start from scratch using the same recipe and now I see this when I try M-x clojure-jack-in start-process-shell-command: Spawning child process: invalid argument Other notes: The value of inferior-lisp-program is lein repl. If I start eshell and type lein repl, I see a repl start up. If I start eshell and type sh and answer the prompt with lein repl, I also see a repl start up. lein is in my windows path c:/emacs and c:/emacs/bin are both in my path so sh.bat can be found the swank-clojure 1.3.3 plugin is installed How do I find out what the invalid argument is? -- 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: Overused phrases in the Clojure community
Clojed-form implementations (vs. cludged-form) is probably too cute by half -- 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: Overused phrases in the Clojure community
In general, I agree that it's annoying to continue seeing certain words used over and over. But the use of the word idiomatic in particular seems to be very idiomatic in the Clojure community, so I don't mind it. :-) On Tue, Nov 15, 2011 at 8:16 PM, thenwithexpandedwingshesteershisflight mathn...@gmail.com wrote: Can we please get bored of saying idiomatic and in particular please ? -- 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
Non Dev Builds
Inspired by Hickey's keynote at the conj, I built a proof of concept for a program to make non dev builds (remove comments, docstrings, line breaks) https://github.com/fractalmedia/prod-build It is very simple, its most important function is: (defn read-file [name] (eval (read-string (str '( (slurp name) ) Which strips comments and line breaks. I'm sharing this for peer reviewing, once it is confirmed that it works nice (or modified accordingly) i will wrap it as a lein plugin. I have 2 questions regarding this: 1. is it more efficient to leave anonymous functions on the form of: #(something %) or: (fn* [p1__69#] (something p1__69#)) (because read-file leaves them on the second form. Also, can somebody confirm if the drop-doc is missing something? Cheers -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Clojure on PyPy
Would Clojure have anything to gain by having something like PyPy's JIT-generator create a custom JIT for it, a'la http://morepypy.blogspot.com/2011/04/tutorial-part-2-adding-jit.html? Or does the JVM already do the stuff that is mentioned in that article? (Or does none of that stuff apply to Clojure as a language for whatever reason?) -- 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-in-CommonLisp?
http://riddell.us/ClojureWithEmacsSlimeSwankOnUbuntu.html -- 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: Non Dev Builds
Hi,
Am 16.11.2011 um 17:17 schrieb Andres Gomez:
It is very simple, its most important function is: (defn read-file
[name] (eval (read-string (str '( (slurp name) )
As a minor nitpick to promote robust code… Please use something like this for
reading:
(let [eof (Object.)] (take-while (complement #{eof}) (repeatedly #(read
file-reader false eof
(str ( ...) is so ugly and fragile. There are many files which do not end in
a newline. And if the last line is a comment…
Sincerely
Meikel
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Re: swank, clojure.repl and my fading sanity
Hey, that looks eerily similar to my gist! :) https://gist.github.com/1324048 On Nov 15, 2:06 am, Sean Corfield seancorfi...@gmail.com wrote: Add the following to your ~/.lein/user.clj: ;; ~/.lein/user.clj (if (= (.compareTo (clojure-version) 1.3.0) 0) (do (use 'clojure.repl) (use 'clojure.java.javadoc))) On Mon, Nov 14, 2011 at 10:57 PM, Yaron ygol...@gmail.com wrote: So when I start a repl from the command line things like doc and source work just fine. But when I start a repl inside of aquamacs and swank clojure (1.3.3) (installed via lein plugin) and clojure (1.3.0) via m-x clojure-jack- in those function/macros don't work at all. For example, if I try (doc str) I get the error unable to resolve symbol: doc in this context [Thrown class java.lang.RuntimeException]. I tried (ns-all) but it doesn't show clojure.repl as being available. (use clojure.repl) just gets me a [Thrown class java.lang.ClassNotFoundException]. Note that the REPL in SWANK works in general. I can evaluate my functions and they work. So how do I get clojure.repl to load in SWANK? Thanks, Yaron -- 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 -- Sean A Corfield -- (904) 302-SEAN An Architect's View --http://corfield.org/ World Singles, LLC. --http://worldsingles.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- 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 on PyPy
The JVM is an advanced, mature JIT compiler. PyPy's generated JIT compilers are not as mature. As a result, the JVM does many of the things in the article and more. From what I see, the benefits of Clojure targetting PyPy would be exploring the performance advantages of very experimental work. Keep in mind, you'd be losing one key advantage of the JVM, which is the rich base of libraries written in java. I believe a main motivation to target different platforms would be because you want to leverage resources available only while on those platforms. -- 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: Overused phrases in the Clojure community
On Tue, Nov 15, 2011 at 11:05 PM, Carl Cotner carl.cot...@gmail.com wrote: In general, I agree that it's annoying to continue seeing certain words used over and over. But the use of the word idiomatic in particularseems to be very idiomatic in the Clojure community, so I don't mind it. :-) On Tue, Nov 15, 2011 at 8:16 PM, thenwithexpandedwingshesteershisflight mathn...@gmail.com wrote: Can we please get bored of saying idiomatic and in particular please ? I don't want to take this topic (or myself) too seriously, but the word idiomatic is a clear and well understood word among programmers. It's useful and specific. I come from a perl background, where there is more than one way to do it, but despite the many ways to do it, there was idiomatic perl on the one hand, and everything else on the other. It's useful for me to ask, when I'm learning a new language, How would this be written in idiomatic befunge? I'll keep the word idiomatic, just as I'll keep the overused word word. I'll promise not to overuse it, and I'll try not to use it incorrectly. -- 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 -- *Off the Beaten Path in Technology http://otbeatenpath.wordpress.com * -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: swank, clojure.repl and my fading sanity
On Wed, Nov 16, 2011 at 3:57 PM, Matthew Boston matthew.bos...@gmail.com wrote: Hey, that looks eerily similar to my gist! :) https://twitter.com/#!/seancorfield/status/130136793210298368 Yup, again, thank you! -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- 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: clj-time and clojure 1.3
On Wed, Nov 16, 2011 at 6:47 AM, Brad b...@beaconhill.com wrote: Just curious what happened with getwoven and clj-time. It seems that Sean has updated clj-time over on Clojars and this version works fine under 1.3. I have taken over clj-time from Mark McGranahan: https://github.com/seancorfield/clj-time (although github seems to be omitting the navigation bar on that repo - I'll open a support ticket). The getwoven repo was supposed to have a notice saying that mine is now the definitive repo. @bradfordcross tweeted about the change. It looks like the disappearance of getwoven's repo has left things in a bit of a mess :( -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- 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: start-process-shell-command: Spawning child process: invalid argument
The attempt revealed the need to install the slime package. After that, the two commands succeed. However, M-x clojure-jack-in still fails in a fresh emacs session with the same error. -- 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 on PyPy
I actually started on this at one point. I ended up scrapping the project for several reasons. But first, I think we must clarify what we mean by runs on pypy. There's two ways of attacking such a project: 1) writing a Clojure interpreter in RPython, and then having PyPy generate a JIT for you. This would, by far, create the fastest solution. PyPy loves creating JITs for languages with immutable data and pure functions. In fact, the JIT goes bonkers with optimization when it comes to programs that follow this criteria. So going this route would allow you to tell the JIT generator that all your functions are pure, and all your data is immutable. The bad thing is, you have no library...you have to write your entire runtime library yourself. 2) writing a Clojure - Python translator, then run the resulting code in PyPy (like Clojurescript does with JS). Here the JIT will be a bit more unhappy since you could change the classes at any moment. Now the fact that you don't change it means that the performance impact will be lessened somewhat, but still the impact will be there. Now both solutions will take two things from you 1) the extensive library of the JVM. The more I work with the JVM (I'm a .NET guy), the more I see the value of the platform. 2) you loose co-currency. Most PyPy code is not thread safe, so there's that. But I have to disagree with Bret on his comments about how advanced the JVM is. True the Sun JVM is advanced, but you have to understand how truely complex the JVM bytecode is. On top of this, no JVM I know actually implements a tracing JIT. This is where PyPy excels. PyPy profiles the code while it is running and does some truely insane optimizations. For instance, PyPy will rip apart data structs. So if Foo.x is the only member used from the Foo struct in function Bar, PyPy will re-write a version of Bar on-the-fly so that Bar takes a single int instead of a full struct. PyPy then also removes unneeded allocations, etc. Basically it unboxes primitives and generates code using those primitives while the program is running. On top of all that, the tracing JIT of PyPy will string functions together, finding the loops in the actual code, then JIT native code to represent these loops. The net effect of this is, that many functions (regex engines, string functions, and yes even video processing) run just as fast in PyPy as in pure C code. And in some cases, PyPy can generate code faster than hand-written C code. So all that to say, yes, I think there's a lot of potential in PyPy, but translating Clojure to it is no small task. And even when you're done, you're still in the same boat as Clojure-CLR and ClojureScript...no matter how good you are, you're still not real Clojure. Timothy -- 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: start-process-shell-command: Spawning child process: invalid argument
I think there is some path issue in your setup between Cygwin and Windows that will take some work to diagnose. You might try installing everything from scratch, or maybe try a Linux vm with VirtualBox (free) or VMWare. Either way, you can use lein swank and slime-connect in the meantime. On Wed, Nov 16, 2011 at 8:55 PM, Andrew ache...@gmail.com wrote: The attempt revealed the need to install the slime package. After that, the two commands succeed. However, M-x clojure-jack-in still fails in a fresh emacs session with the same error. -- 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: Non Dev Builds
Thanks for the robustness tip, Meikel.
Just a question, i dont understand what you state, i dont think it
needs to end in a newline in order to work.
On Nov 16, 5:17 pm, Meikel Brandmeyer m...@kotka.de wrote:
Hi,
Am 16.11.2011 um 17:17 schrieb Andres Gomez:
It is very simple, its most important function is: (defn read-file
[name] (eval (read-string (str '( (slurp name) )
As a minor nitpick to promote robust code… Please use something like this for
reading:
(let [eof (Object.)] (take-while (complement #{eof}) (repeatedly #(read
file-reader false eof
(str ( ...) is so ugly and fragile. There are many files which do not end
in a newline. And if the last line is a comment…
Sincerely
Meikel
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Re: adding metadata to java objects
On Wed, Nov 16, 2011 at 22:32, Alan Malloy a...@malloys.org wrote:
On Nov 16, 11:53 am, Ben Smith-Mannschott bsmith.o...@gmail.com
wrote:
On Wed, Nov 16, 2011 at 17:28, Ben Mabey b...@benmabey.com wrote:
Hi,
I would like to be able to add metadata to arbitrary java objects that have
already been instantiated. I know that you can use proxy to add metadata
to
objects that you create but in my case the object already exists (i.e. it
is
returned from another method call outside of my control).
It seems like the best solution would be to create a delegate class/object
that wraps the original one. Being able to write something like this would
be ideal:
(defn wrap-with-meta
([obj]
(wrap-with-meta obj nil))
([obj meta]
(delegate obj
clojure.lang.IObj
(withMeta [this new-meta] (wrap-with-meta obj
new-meta))
(meta [this] meta
The delegate function would operate very similar to proxy, but instead of
taking a class it takes an object. A class would be created that extends
the object's class, just like a class is generated for proxy. However,
instead of stubs being generated that call super the stubs would delegate
to
the given object. (Also note, I am also using reify-like syntax since I
prefer that to the syntax in proxy.)
I'm curious to hear people's thoughts on this approach. I'd also be really
interested to see how other people have addressed this in the past (I doubt
I'm the first one to run into this).
I know that clojure mentality is to avoid wrappers, but I don't see this as
being much different than what proxy already does. Of course, I may be
missing something... if so, please enlighten me. :)
Thanks,
Ben
Here's an approach that may be of use: don't store the metadata in a
Map instead of decorating the Object with it. This map should use
object identity, not equality and should hold its keys weakly so that
it prevent collection of objects that otherwise would be garbage.
Safe to use concurrently would also be a plus. Conveniently, Google's
Guava library provides such a thing. Here's a sketch:
== project.clj
(defproject pojometa 0.0.1-SNAPSHOT
:dependencies [[org.clojure/clojure 1.3.0]
[com.google.guava/guava 10.0.1]])
== src/pojometa/core.clj ==
(ns pojometa.core
(:import [com.google.common.collect MapMaker]))
(def meta-map
(- (MapMaker.) .weakKeys .makeMap))
(defn meta* [o]
(if (instance? clojure.lang.IMeta o)
(clojure.core/meta o)
(.get meta-map o)))
(defn with-meta* [o m]
(if (instance? clojure.lang.IMeta o)
(clojure.core/with-meta o m)
(do (.put meta-map o m)
o)))
== usage ==
pojometa.core= (def o (Object.)) ;; arbitrary java object
pojometa.core= (meta* (with-meta* o {:foo true}))
{:foo true}
;; also does the right thing for Clojure types that
;; already know how to have metadata.
pojometa.core= (meta* (with-meta* {} {:bar 1}))
{:bar 1}
(def o (Object.))
(def om (with-meta* o {:foo true}))
(def whatever (with-meta* o {:foo false}))
(meta* om) ;= {:foo false}
Doesn't really support Clojure's concept of metadata if it's shared
global mutable state.
Yes, that's true. Though it wouldn't occur to me to expect some random
POJO to behave as if it were persistent WRT metadata. POJOs generally
conflate state and identity and are mutable. That's life. If that's a
problem, then you'll need to wrap it in something that supports
metadata.
// ben
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Re: Non Dev Builds
== FILE ==
(def x 1) NEWLINE
; my comment
==
(str '( (slurp FILE) ) )
produces:
==
'((def x 1) NEWLINE
; my comment)
==
oops.
On Thu, Nov 17, 2011 at 05:32, Andres Gomez and...@fractalmedia.mx wrote:
Thanks for the robustness tip, Meikel.
Just a question, i dont understand what you state, i dont think it
needs to end in a newline in order to work.
On Nov 16, 5:17 pm, Meikel Brandmeyer m...@kotka.de wrote:
Hi,
Am 16.11.2011 um 17:17 schrieb Andres Gomez:
It is very simple, its most important function is: (defn read-file
[name] (eval (read-string (str '( (slurp name) )
As a minor nitpick to promote robust code… Please use something like this
for reading:
(let [eof (Object.)] (take-while (complement #{eof}) (repeatedly #(read
file-reader false eof
(str ( ...) is so ugly and fragile. There are many files which do not end
in a newline. And if the last line is a comment…
Sincerely
Meikel
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Re: Non Dev Builds
Hi,
Consider this file. The * marks the not there \n.
Foo
; Bar*
And slurp and the str call, you get a string which looks like this
(Foo\n;Bar). And this gives an error because the closing ) is in the
comment.
Here you see the effect:
user= (with-open [w (writer x)] (binding [*out* w] (print Foo\n;Bar)
(flush)))
nil
user= (read-string (str ( (slurp x) )))
RuntimeException EOF while reading clojure.lang.Util.runtimeException
(Util.java:156)
user= (with-open [r (LineNumberingPushbackReader. (reader x))]
(let [eof (Object.)]
(- #(read r false eof)
repeatedly
(take-while (complement #{eof}))
doall)))
(Foo)
user=
Sincerely
Meikel
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