Re: core.async question - canceling thread
What is the task doing? If it is in a tight loop, it must check explicitly whether the interrupt flag is set and abort. If it is waiting on some resource, it will receive InterruptedException. Regards, Praki Prakash On Wed, Jan 22, 2014 at 11:20 AM, Mark Engelberg mark.engelb...@gmail.comwrote: On Wed, Jan 22, 2014 at 2:51 AM, Jozef Wagner jozef.wag...@gmail.comwrote: You can put the computation into a future, and cancel the future after the timeout. I experimented with that, but it didn't seem to work. I suspect that canceling a future doesn't really do what I think it should do. I would appreciate some further clarity on how future cancellations work, and if someone thinks it applies here, would like to see concretely how to do it. -- -- 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/groups/opt_out. -- -- 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/groups/opt_out.
Re: ANN: Clojure High Performance Programming
Hi Shantanu, Congrats on the book. Looks like it's going to be a great read and no doubt a much needed book on the subject of performant code. Regards, Praki Prakash On Thu, Nov 21, 2013 at 11:09 AM, Shantanu Kumar kumar.shant...@gmail.comwrote: On Thursday, 21 November 2013 21:39:36 UTC+5:30, Gary Johnson wrote: This looks incredible! Just bought a copy. Congratulations, Shantanu! Thanks, Gary! Those who might look for a Kindle edition can find it here: http://www.amazon.com/Clojure-Performance-Programming-Shantanu-Kumar-ebook/dp/B00GTE1RVW/ref=sr_1_2?s=digital-textie=UTF8qid=1385043536sr=1-2keywords=packt+publishing Shantanu -- -- 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/groups/opt_out. -- -- 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/groups/opt_out.
Re: My recap of Clojure/conj 2013
Please accept my thanks as well! Regards, Praki Prakash On Wed, Nov 20, 2013 at 6:25 PM, Eduardo Lávaque eduanlava...@gmail.comwrote: Thanks for this Logan. :) -- -- 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/groups/opt_out. -- -- 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/groups/opt_out.
Re: ANN: Clojure 1.4.0-beta1
I use mvn -X to diagnose such issues. mvn can also produce detailed reports on dependency and much more (mvn site -- I think). HTH On Fri, Feb 3, 2012 at 9:19 AM, Tassilo Horn tass...@member.fsf.org wrote: Stuart Sierra the.stuart.sie...@gmail.com writes: Hi Stu, Clojure 1.4 goes beta! This release is essentially the same as 1.4.0-alpha5. It will hit the Maven Central repository in a few hours. Great news, I'd very much like to test-drive it before the 1.4.0 release. Is there anything better than downloading its JAR and replacing the clojure-1.3.0.jar in my project with it? As soon as I change my [org.clojure/clojure 1.3.0] dependency to 1.4.0-alpha5 (beta1 seems not have arrived yet) or [1.3.0,), maven gets messed up when fetching dependencies... Right now, my minimized test project deps are :dependencies [[org.clojure/clojure 1.3.0] [ordered 0.3.0] [org.clojure/tools.macro [0.1.1,)]] which works fine. Now I've seen that ordered-1.0.0 is out. That still works fine. :dependencies [[org.clojure/clojure 1.3.0] [ordered 1.0.0] [org.clojure/tools.macro [0.1.1,)]] Now trying to get the clojure snapshot breaks maven's dependency management. :dependencies [[org.clojure/clojure 1.4.0-alpha5] [ordered 1.0.0] [org.clojure/tools.macro [0.1.1,)]] It errors because it couldn't download org.clojure:clojure:jar:1.3.0-alpha5. But why 1.3.0-alpha5?!? Strangely, when reverting my test project to an older ordered version, it works fine again. :dependencies [[org.clojure/clojure 1.4.0-alpha5] [ordered 0.3.0] [org.clojure/tools.macro [0.1.1,)]] Argh, I'll never understand maven. Is there something option to make it show the dependency tree? I mean, tools.macro doesn't seem to have any dependencies declared and ordered 1.0.0 has clojure [1.2.0,1.3.0] as dependency. But why on earth does maven then try to get 1.3.0-alpha5? And is there a way to influence external deps? For example, I'm pretty sure that the ordered library works just fine with 1.4.0. Currently, it seems to me that in order to upgrade my own project to 1.4.0, I have to wait until all my dependencies also added 1.4.0 as a allowed dependency, which might take ages and hinders early test-driving and adoption of new clojure releases. Sorry, that mail was not intended to become a long rant. But I'm really interested to know how others deal with the maven hell. Bye, Tassilo -- 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 -- (praki) -- 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: I don't understand how to instantiate a closure library object
On Tue, Jan 10, 2012 at 2:22 PM, billh2233 bill.har...@gmail.com wrote: I'm trying to instantiate a new goog.fx/Animate object, but the constructor doesn't return anything: (:require [goog.fx :as fx]) (let [anim (fx/Animation (array 22 33) (array 44 55) 1000 nil)] anim: #undefined end anim ... (let [anim (fx/Animation. (array 22 33) (array 44 55) 1000 nil)] (period after fx/Animation.) -- 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: ClojureScript – inter-namespace usage
I bind *print-fn* and it seems to work fine in my snapshot of master pulled on 12/14. On Mon, Jan 9, 2012 at 6:16 PM, David Nolen dnolen.li...@gmail.com wrote: binding works just fine in CLJS. That it doesn't work with required vars sounds like a bug. On Monday, January 9, 2012, Stuart Sierra the.stuart.sie...@gmail.com wrote: Hi Shantanu, #1 is a bug. #2 is not possible because `import` doesn't exist in ClojureScript: it doesn't differentiate between host classes and ClojureScript code. Protocols and types should be accessible with normal `require` in ClojureScript. #3 seems unlikely to be implemented. ClojureScript doesn't have Vars, and it doesn't have threads, so there's not much for `binding` to do. I could see `with-redefs` being supported, however. -S -- 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 -- (praki) -- 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: Late provide error in compiling clojurescript files
Thanks for your response Benjamin. I was leaning towards cyclic dependency myself. I couldn't get closurebuilder.py (which apparently detects cyclic dependencies) but couldn't get it to run on my source. After your response, I did a dependency analysis by hand and found no cycles. However, I narrowed down this error to only hyphenated namespaces. After some more snooping around, I found the cause to be requiring foo.bar-baz as foo.bar_baz (in some places). I suspect that this confused the dependency analysis. I don't fully understand how/why it works when I compile again but, boy, am I glad to have cljs-watch work! Big time saver! Hopefully, someone from the clojurescript compiler team can enlighten on this. On Wed, Jan 4, 2012 at 7:44 AM, Benjamin Teuber bsteu...@googlemail.com wrote: Hi, I just had the same problem and discovered it was a cyclic dependency - maybe you want to check for that, too.. Regards Benjamin On Jan 3, 9:19 am, Praki praki.prak...@gmail.com wrote: Hi, I have a silly problem compiling my cljs files. I have to run the cljsc command twice in succession to generate javascript source. The first compilation results in: ERROR: JSC_LATE_PROVIDE_ERROR. required foo.bar namespace not provided yet at /home/.../src/../target/classes/public/js/core.js line 18 : 12 Please note that my core.cljs requires foo.bar namespace. The second cljsc command works without any error. I doubt that clojurescript compiler requires running it multiple times in succession and suspect some problem in my usage of it. I would expect closure compiler to process the transitive dependencies correctly. I see the same issue with cljs-watch which is a major productivity issue for me. Has anyone else encountered this issue? Does anybody know the cause of this error? 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 -- (praki) -- 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: Alright, fess up, who's unhappy with clojurescript?
On Thu, Jul 28, 2011 at 5:20 PM, Tal Liron tal.li...@gmail.com wrote: jQuery is not so much an elephant as it is a mammoth. It was one of the first clientside-JS frameworks to reach a broad audience, but it also one of the worst. It incorporates so many terrible JS practices, performs miserably, and really can make anyone dislike JS. People have mentioned other clientside frameworks. Let me mention also Ext JS, which I believe knocks the socks off the rest. It is crafted with a real appreciation of JS, and that love may rub off you a little as you work with it. I am not a front-end developer but I am currently stuck prototyping using JQuery. I am also not a JS expert. I am curious: can you list JQuery's issues and how it uses JS badly? Or, provide some references? -- (praki) -- 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: First foray into profiling
It is most likely the transport used between your profiler front-end and the JVM backend. Right click on the entry point you are interested in and display it as a subtree. VisualVM and YourKit profilers show time percentages based on the time spent in that method which is want you want to see. Praki On Sun, Jan 9, 2011 at 10:52 AM, Mark Engelberg mark.engelb...@gmail.comwrote: On Sun, Jan 9, 2011 at 3:15 AM, Mark Engelberg mark.engelb...@gmail.com wrote: In the meantime, I fired up the lein repl which did start up in -server mode, and tried to do some profiling. It tells me 80% of its time is being spent in: sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run() To be clear, I have absolutely no idea what this TCPTransport$ConnectionHandler class does, or why its run method would be called as a result of my code, let alone why it is taking 80% of the run time. I'm doing nothing requiring internet connectivity, or communication between programs. Any ideas about this? -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.comclojure%2bunsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Knuth's literate programming tangle function in Clojure
Tim, This approach is very interesting. My choice of mode for LP has always been noweb-mode but it doesn't seem to work with my version of emacs anymore. My current approach is to embed prose and clojure code in a latex document and generate a .tex file with formatted clojure code and .clj containing only clojure code. Needless to say, it is a hack and I would like to see if I can adopt your approach. However, I have a question on mapping of line numbers in clojure stacktrace to its source. AFAIK, there is no support in clojure compiler for #LINE directive. In my case, a code is always in one location and I just replace latex lines with empty lines. How do you address this issue? Thanks, Praki On Sat, Dec 25, 2010 at 10:01 PM, Tim Daly d...@axiom-developer.org wrote: ; 0 AUTHOR and LICENSE ; 1 ABSTRACT and USE CASES ; 2 THE LATEX SUPPORT CODE ; 3 IMPORTS ; 4 THE TANGLE COMMAND ; 5 SAY ; 6 READ-FILE ; 7 ISCHUNK ; 8 HASHCHUNKS ; 9 EXPAND ; 10 TANGLE -- 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 1.2 Beta 1
I think my number crunching code would benefit immensely from equals/equiv code. When can we hope to see a release containing equals/equiv effort? Thanks On Wed, Jul 14, 2010 at 10:42 AM, Stuart Halloway stuart.hallo...@gmail.com wrote: Later release. I didn't see mention of the new equals/equiv work. Is this going into a later beta or is this work tentatively going into a later release? -- 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: Suggestions for a file and line implicit argument in macros
I have the same problem and implicit file/line arguments would be very useful to me as well. On Wed, Jul 14, 2010 at 8:21 AM, Nicolas Oury nicolas.o...@gmail.com wrote: Dear all, I am using a lot of macros with a quite complex syntax and I would like to be able to report error nicely. I haven't been able to find a way to report the file and (most importantly) the line of the macro whose evaluation produce an error. Have I missed some way of doing that? Would two implicit arguments file and line be useful for others, or I am the only one that needs something like that? Best regards, Nicolas PS: and congratulations and thanks so much for Clojure 1.2 beta 1. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Perplexing bug
BTW, I am using 1.2.0-master-SNAPSHOT for clojure and clojure-contrib but clojure-http-client is 1.0.0-SNAPSHOT. I will try this with the most recent version. Thanks On Wed, Jun 9, 2010 at 10:35 AM, Moritz Ulrich ulrich.mor...@googlemail.com wrote: I'm not sure if this is related, but in recent Snapshots of clojure-http-client, the namespace was renamed to clojure-http.client. This was a small issue with my fork from clojure-couchdb. (I think clojure-http-client really needs a stable release for clojure 1.1.0) On Wed, Jun 9, 2010 at 7:31 PM, Praki praki.prak...@gmail.com wrote: I started using one-jar to package my clojure code as a single executable jar and ran into a problem right away with loading of classes. I have a very simple project at g...@github.com:fgx3prak/ bug.git that crashes in the same manner as my real code base and think that the underlying problem is the same. The source looks like this: (use 'clojure.http.client) (ns bug (:use clojure.http.client)) In short, mvn compile works fine the first time but fails after that. If I have only one of use or ns, there is no error. I believe that the combination of use and ns represents the condition under which the bug manifests itself in the real code. I haven't been able to figure out the cause of this problem. I have already looked at verbose:class output and AFAIK clojure.http.client class is getting loaded completely. Is there any way to get a trace of clojure class loading? Any help/hints greatly appreciated! Thanks! 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:1578) at clojure.lang.RT.load(RT.java:399) at clojure.lang.RT.load(RT.java:381) at clojure.core$load$fn__4506.invoke(core.clj:4893) at clojure.core$load.doInvoke(core.clj:4892) at clojure.lang.RestFn.invoke(RestFn.java:409) at clojure.core$load_one.invoke(core.clj:4717) at clojure.core$compile$fn__4511.invoke(core.clj:4904) at clojure.core$compile.invoke(core.clj:4903) at clojure.lang.Var.invoke(Var.java:365) at clojure.lang.Compile.main(Compile.java:56) Caused by: java.lang.NullPointerException at clojure.core$refer.doInvoke(core.clj:3276) at clojure.lang.RestFn.invoke(RestFn.java:411) at clojure.lang.AFn.applyToHelper(AFn.java:163) at clojure.lang.RestFn.applyTo(RestFn.java:133) at clojure.core$apply.invoke(core.clj:542) at clojure.core$load_lib.doInvoke(core.clj:4769) at clojure.lang.RestFn.applyTo(RestFn.java:143) at clojure.core$apply.invoke(core.clj:542) at clojure.core$load_libs.doInvoke(core.clj:4788) at clojure.lang.RestFn.applyTo(RestFn.java:138) at clojure.core$apply.invoke(core.clj:544) at clojure.core$use.doInvoke(core.clj:4868) at clojure.lang.RestFn.invoke(RestFn.java:409) at bug__init.load(Unknown Source) at bug__init.clinit(Unknown Source) ... 13 more -- 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 -- http://www.google.com/profiles/praki.prakash -- 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: Perplexing bug
Same story with the latest snapshot of clojure-http-client. Same thing happens with compojure.core. BTW, I am using 1.2.0-master-SNAPSHOT for clojure and clojure-contrib but clojure-http-client is 1.0.0-SNAPSHOT. I will try this with the most recent version. Thanks ulrich.mor...@googlemail.com wrote: I'm not sure if this is related, but in recent Snapshots of clojure-http-client, the namespace was renamed to clojure-http.client. This was a small issue with my fork from clojure-couchdb. -- 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: promoting contrib.string to clojure, feedback requested
personally, I like strip or trim than chomp/chop. +1 Seeing how Clojure dropped/changed many classic Lisp monikers, there is no reason to use comp/chop which may be familiar to somebody with Perl/Python but confusing to others. -- 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: Has deftype changed?
Thanks Andrew. I did catch 'this' argument requirement sometime back but the 'new' bit escaped me. Praki On Sat, Apr 17, 2010 at 6:16 PM, Andrew Stein steinl...@gmail.com wrote: (deftype Bar [a b c d e]) (def b (new Bar 1 2 3 4 5)) There are a few other syntax changes too, defrecord replaces extending IPersistenMap, and you need to include 'this' in protocol fun implementations ... http://richhickey.github.com/clojure/clojure.core-api.html#clojure.core/deftype http://richhickey.github.com/clojure/clojure.core-api.html#clojure.core/defrecord On Apr 17, 4:37 pm, Praki praki.prak...@gmail.com wrote: I am seeing compilation errors in my code with deftype. I just updated my project dependencies and probably pulled in the latest clojure package. Anyway, the following code from wiki doesn't work anymore. Pointers to any late breaking changes much appreciated! TIA (deftype Bar [a b c d e]) (def b (Bar 1 2 3 4 5)) Expecting var, but Bar is mapped to class package.Bar [Thrown class java.lang.Exception] Restarts: 0: [ABORT] Return to SLIME's top level. Backtrace: 0: clojure.lang.Compiler.lookupVar(Compiler.java:5677) 1: clojure.lang.Compiler.isMacro(Compiler.java:5178) 2: clojure.lang.Compiler.macroexpand1(Compiler.java:5233) 3: clojure.lang.Compiler.analyzeSeq(Compiler.java:5305) 4: clojure.lang.Compiler.analyze(Compiler.java:5140) 5: clojure.lang.Compiler.access$100(Compiler.java:35) 6: clojure.lang.Compiler$DefExpr$Parser.parse(Compiler.java:417) 7: clojure.lang.Compiler.analyzeSeq(Compiler.java:5319) 8: clojure.lang.Compiler.analyze(Compiler.java:5140) 9: clojure.lang.Compiler.analyze(Compiler.java:5101) 10: clojure.lang.Compiler.eval(Compiler.java:5377) 11: -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.comclojure%2bunsubscr...@googlegroups.com For more options, visit this group athttp:// groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.comclojure%2bunsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- http://www.google.com/profiles/praki.prakash -- 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: Has deftype changed?
That was my interpretation as well. I now have defrecord instead of deftype everywhere. It looks like deftype was refactored into deftype and defrecord. deftype implements none of the usual interfaces (IPersistentMap) whereas defrecord does. Praki On Sun, Apr 18, 2010 at 11:33 AM, ataggart alex.tagg...@gmail.com wrote: My sense from the changes is that defrecord is the map-like one, whereas deftype is the lower-level construct used to implement stuff like clojure collections. I imagine users will use defrecord more often than deftype. On Apr 18, 10:49 am, Rob Lachlan robertlach...@gmail.com wrote: For deeftype, has the syntax for field accessors changed too? I can't get it to work: user (deftype someType [b f]) user.someType user (def y (new someType 2 3)) #'user/y user (:b y) nil user (:f y) nil defrecord works as expected, though. On Apr 17, 6:16 pm, Andrew Stein steinl...@gmail.com wrote: (deftype Bar [a b c d e]) (def b (new Bar 1 2 3 4 5)) There are a few other syntax changes too, defrecord replaces extending IPersistenMap, and you need to include 'this' in protocol fun implementations ... http://richhickey.github.com/clojure/clojure.core-api.html#clojure.co .. On Apr 17, 4:37 pm, Praki praki.prak...@gmail.com wrote: I am seeing compilation errors in my code with deftype. I just updated my project dependencies and probably pulled in the latest clojure package. Anyway, the following code from wiki doesn't work anymore. Pointers to any late breaking changes much appreciated! TIA (deftype Bar [a b c d e]) (def b (Bar 1 2 3 4 5)) Expecting var, but Bar is mapped to class package.Bar [Thrown class java.lang.Exception] Restarts: 0: [ABORT] Return to SLIME's top level. Backtrace: 0: clojure.lang.Compiler.lookupVar(Compiler.java:5677) 1: clojure.lang.Compiler.isMacro(Compiler.java:5178) 2: clojure.lang.Compiler.macroexpand1(Compiler.java:5233) 3: clojure.lang.Compiler.analyzeSeq(Compiler.java:5305) 4: clojure.lang.Compiler.analyze(Compiler.java:5140) 5: clojure.lang.Compiler.access$100(Compiler.java:35) 6: clojure.lang.Compiler$DefExpr$Parser.parse(Compiler.java:417) 7: clojure.lang.Compiler.analyzeSeq(Compiler.java:5319) 8: clojure.lang.Compiler.analyze(Compiler.java:5140) 9: clojure.lang.Compiler.analyze(Compiler.java:5101) 10: clojure.lang.Compiler.eval(Compiler.java:5377) 11: -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.comclojure%2bunsubscr...@googlegroups.com For more options, visit this group athttp:// groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.comclojure%2bunsubscr...@googlegroups.com For more options, visit this group athttp:// groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.comclojure%2bunsubscr...@googlegroups.com For more options, visit this group athttp:// groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.comclojure%2bunsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- http://www.google.com/profiles/praki.prakash -- 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: Simple functional programming lexicon?
I spent a lot of time trying to understand monads in Haskell, which led to reading Category Theory. It's an alluring subject and one can spend a lot time following the concepts and terminology. But, the good news is that, one doesn't need an advanced degree in math to appreciate monads in FP. A really helpful paper that explains the motivation for Monads is this: http://homepages.inf.ed.ac.uk/wadler/papers/marktoberdorf/baastad.pdf As others have mentioned, Haskell is heavy in its use of monads and many other algebraic structures. I don't know why the two languages feel so different with respect to the level of formalism you need to use them. But, Haskell is one of the most mind bending programming language there and well worth the study. Praki On Wed, Mar 17, 2010 at 5:16 PM, Ben Armstrong synerg...@gmail.com wrote: On 17/03/10 04:54 PM, David Nolen wrote: To me the beauty of Clojure isn't that you _don't_ need a strong academic background or even much exposure to FP to approach the language. Clojure is relatively free of FP jargon, instead we have Rich Hickey Jargon. I jest :) Very good. And so far, my experience has borne this out. It is approachable, elegant, immediately usable. It's just that I am curious, so I would like to be able to have at least a basic idea of what these other conversations are about, even if I can't entirely follow every argument. But seriously, in my personal opinion Monads are relatively useless in the context of Clojure. They are necessary in pure FP languages like Haskell because otherwise it's impossible get any real applications written. This is not to say they are not useful, you just don't need to know a damn thing about them to have fun in Clojure. OK. That puts it a bit more in perspective. Also, once I was online again, I reached for Wikipedia to see if I could find an article written to be understood by those outside the field. Actually, the first two paragraphs here were helpful to get at least a basic grasp of what Monads are about: http://en.wikipedia.org/wiki/Monad_(functional_programming)http://en.wikipedia.org/wiki/Monad_%28functional_programming%29 The overview here is certainly more readable than the foldoc entry I read, and it, in turn links to a page on monad as used in category theory which is, I am sure, readable by mathematicians, but which again left me scratching my head just as the foldoc entry had. So I guess it's not so much FP that I find hard to grok as it is the math from which it has borrowed some terminology. Having hacked on Clojure for a a year and half now I think the best approach is to learn those aspects of Clojure that are most useful to you. You certainly don't need to pick up everything at once. I still don't completely grok deftype/protocols or the more involved concurrency constructs. This hasn't stopped me from writing many useful programs. Most useful to me, or at least most interesting ... I can't say that at this point I can see where I'm going to use this. But it certainly *is* intriguing ... including the bits that right now are a hard to follow at least in part due to the unfamiliar terms. If you _do_ want to get deeper in Clojure's philosophy you can't beat Rich Hickey's Amazon Bookshelf. I'm not sure at this point how deep I want to go. Nice resource, though. 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.comclojure%2bunsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- http://www.google.com/profiles/praki.prakash -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Leiningen, Clojure and libraries: what am I missing?
Lein could be a step in the right direction, but I wonder how it will manage to evolve given the complex tools it uses internally. I have also seen a weird issue in my code base which has two classes derived from java.lang.Exception. If I do a clean and try compile, I get an error saying that my.package.MyException class not found. My workaround is, set :namespaces to only those Exception derived classes, compile and then set :namespaces to :all. Maybe I am missing some cool lein thing here or lein needs quite a bit of work in dependency handling. I am tempted to just stick to mvn which is quite mature and well-documented. Any clojure-specific needs could be addressed through a plug-in. Comments, thoughts? Thanks, Praki On Thu, Mar 4, 2010 at 5:52 AM, Stuart Halloway stuart.hallo...@gmail.com wrote: Hi Jan, My 2c: Leiningen is an important step, but there is still plenty to do. My workflow: I am developing multiple Clojure libraries and applications, with some of the dependencies changing daily. Whenever I want to make a change, I: In the project being changed: git tag a new version number update the project.clj to a new version number run lein pom and lein jar copy the new files to a repos (clojars) In projects that depend on changed project update the dependency in project.clj (if it is hard coded and not =) run lein deps This seems adequate to me (although there could be a bit more automation). The problem of snapshot dependencies remains. The solution that springs to mind here is to get projects off snapshots (presumably by releasing more incremental versions). Library authors: please release lots of versions! (or tell me why this is a bad idea). Some needs I see: (0) More point releases of key libs (or some other solution to the snapshots problem) (1) Unify around the project structure imposed by lein, and/or (2) Improve the project structure imposed by lein, if it is broken in some specific way. (Maybe add a well-known config file for adding elements to the classpath?) (3) lein deps (or some other task) to clean up old jars. Right now I am deleting them by hand from the lib directory. (Is this already solved?) Stu I haven't hacked on new Clojure stuff for the past two months or so. Now, having updated my repositories, I find that everybody just dropped ant and moved to leiningen. I tried to make sense of things, but can't. I must be missing something big here. It seems that leiningen assumes that you are building an application. It downloads all dependencies and can build an uberjar for you. That's great, but what if what I have is a bunch of libraries, all being developed and modified? Also, I now have at least six clojure jars in ~/.m2 (huh?!), along with a collection of other assorted stuff. I don't want to use any of these clojure jars, I have a checked out git repo with clojure and this is the only code I want to run. Also, swank-clojure insists on having its own clojure jar in ~/.swank-clojure (why?). I used to have a bunch of directories with git repos. I would update those, run ant to gather code into jars, fiddle with the classpath in my custom-crafted clj script, symlink things around. It was about as bad as with Common Lisp. But now things got worse -- I no longer feel in control of anything. Some things won't build, lein tells me about artifacts (huh?!), things get installed in weird places. My clj script that gets run by SLIME form Emacs can't find libraries that leiningen downloaded. How do people deal with this? As a more general observation, I think that a large part of Perl's and Python's success was a unified way of dealing with libraries. There are certain directories where you can drop libraries and expect them to work (be found). There is ONE way of running the VM (one script, blessed by the language creator). Then on top of that there is CPAN, which plugs into that, downloading dependencies and dropping libraries into those well-known directories. It isn't perfect, but it works, and is predictable. Shouldn't we have a well-known Single Setup for Clojure as well? I am very worried that Clojure is rapidly going the Common Lisp way, with each developer having his own precious carefully crafted setup. Every system is different, everyone uses a different script to run clojure programs, there is no single place to drop your libraries into, and libraries have no conventions on where their code is (what do I add to classpath once I have a library checked out?). I thought Leiningen was supposed to solve these issues, but either I am missing something, or it is really a tool to manage dependencies for a single application. --J. -- 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
