Re: special handling of :type in meta data
On 27.04.2009, at 00:33, David Chamberlin wrote: I can get round this by not using a structure map for the metadata, but since I'm going to be creating container loads of these structures I understand that I need to be using struct-maps for efficiency. Is there a reason why this should not work? Here is why it does not work. Any attempt to print a value causes a call to clojure.core/print-method. This is a multimethod that dispatches on clojure.core/type, i.e. by the :type on the metadata or, if there is no metadata or no :type tag, on class. If there is a :type tag but it has no implementation of print-method, a :default implementation removes the :type tag and tries again. It's removing the type tag that fails in your case. On March 27 I sent a message to this group that contains a patch for clojure.core that fixes this problem, and other of a similar kind. The subject is PATCH: printing a ref with type metadata. I can't find the message in Google's archive, so I wonder if it got lost. The patch is attached again to this message. As for efficiency, I doubt that struct maps make that much of a difference, but I didn't do any timings. Note that in your example, you create the metadata map once and assign it to m. The map is thus created only once, no matter to how many values you attach it later. That's how I handle metadata maps as well. The only potential difference in execution time thus comes from looking up :type. Compared to the rest of the work done in multimethod dispatching, I can't imagine that key lookup is that much more efficient for struct maps that it makes a difference overall. 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 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 -~--~~~~--~~--~--~--- print-method.patch Description: Binary data
Re: Unloading a namespace?
http://clojure.org/api#remove-ns ?? i never used it but it seems to do it ;-) On 27 abr, 06:08, Mark Derricutt m...@talios.com wrote: Is it possible to unload/remove a namespace at runtime at all? Mark ...and then Buffy staked Edward. The End. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: Getting slime-edit-definition to work with Clojure
Phil, It works for me. Are you trying to look up a built-in clojure function or one from your own application? How did you install SLIME and swank-clojure etc? It doesn't work for either. When I try looking up a clojure-contrib function, I get let*: Search failed: clojure/contrib/str_utils.clj$ In case of a function that I wrote somewhere in a file and loaded in SLIME, I get an exception - java.lang.StringIndexOutOfBoundsException: String index out of range: -1 (NO_SOURCE_FILE:0) (in *Messages* I get funcall: Synchronous Lisp Evaluation aborted) If you installed by hand, you could try using M-x clojure-install from a recent copy of clojure-mode.el. This should download and configure all the necessary things to hook up Emacs and Clojure via SLIME. I have installed it by hand and I have installed swank-clojure as well as clojure-mode. Everything else works just fine, except this. I tried re-installing Clojure using M-x clojure-install and I get the same result with that too. If it's still not working, try pasting the contents of your *Messages* buffer to the list. In case of my own function: funcall: Synchronous Lisp Evaluation aborted In case of clojure-contrib.str-utils.str-join: let*: Search failed: clojure/contrib/str_utils.clj$ Any help will be highly appreciated. PS - Relevant sections from my ~/.emacs ;;; (require 'slime) (slime-setup '(slime-fancy slime-banner slime-mdot-fu)) (defvar slime-net-coding-system (find-if 'slime-find-coding-system '(utf-8-unix iso-latin-1-unix iso-8859-1-unix binary))) ;;; Clojure specific (defvar clj-root (concat (expand-file-name ~) /clojure/)) (setq load-path (append (list (concat clj-root clojure-mode) (concat clj-root swank-clojure)) load-path)) (setq swank-clojure-binary clojure) (require 'swank-clojure-autoload) (add-to-list 'slime-lisp-implementations '(sbcl (/usr/bin/sbcl)) '(clojure (/home/ghoseb/bin/clojure) :init swank-clojure-init)) (require 'clojure-mode) (eval-after-load 'clojure-mode '(clojure-slime-config)) (autoload 'clojure-mode clojure-mode A major mode for Clojure t) (add-to-list 'auto-mode-alist '(\\.clj$ . clojure-mode)) (defun lisp-enable-paredit-hook () (paredit-mode 1)) (add-hook 'clojure-mode-hook 'lisp-enable-paredit-hook) (defun sbcl () Starts sbcl in Slime (interactive) (slime 'sbcl)) (defun clj () Starts Clojure in Slime (interactive) (slime 'clojure)) ;;; Regards, BG -- Baishampayan Ghose b.gh...@ocricket.com oCricket.com --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: special handling of :type in meta data
Hi Konrad, Am 27.04.2009 um 08:44 schrieb Konrad Hinsen: As for efficiency, I doubt that struct maps make that much of a difference, but I didn't do any timings. AFAIU, struct-maps are not an optimisation for efficiency of the key lookup, but for the storage space of the keys. So timings should probably read memstats. Sincerely Meikel smime.p7s Description: S/MIME cryptographic signature
Re: How to call function (or Java method) using string name?
fft1976 a écrit : On Apr 26, 9:21 am, Stuart Sierra the.stuart.sie...@gmail.com wrote: resolve will find the Var that is named by the symbol. Can there be Vars without names? Can I have a vector of Vars? You can, see with-local-vars for example. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: special handling of :type in meta data
On 27.04.2009, at 09:42, Meikel Brandmeyer wrote: AFAIU, struct-maps are not an optimisation for efficiency of the key lookup, but for the storage space of the keys. So timings should probably read memstats. If memory is the issue, then creating a single instance of the metadata map for all values of a type should be sufficient. As for timing, key lookup is faster for struct maps than for standard maps if the number of keys defined in the struct is much smaller than the total number of keys in the map. This is probably not the case for most real-life metadata maps. Key lookup can be improved even more using accessor functions, but that would imply relying on the metadata being a struct-map for a given struct, which doesn't look like a great idea. 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 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: Unloading a namespace?
Well that was a simple answer ;-) That should help with using clojure in OSGi, having a way to trigger an unload when a bundle dissapears should get around the problem of coercing everything to use the same classloader. I sense some more hacking in the near future :) On Mon, Apr 27, 2009 at 7:08 PM, atreyu atreyu_...@yahoo.es wrote: http://clojure.org/api#remove-ns ?? i never used it but it seems 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 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 -~--~~~~--~~--~--~---
Oddity with clojure-contrib/sql
Hey guys,
Just started looking at clojure-contrib's sql namespace, however, using the
following code:
(let [user_id (.toString (java.util.UUID/randomUUID))]
(sql/with-connection db (sql/insert-records
:users
{:user_id user_id})))
and clojure-contrib-1.0-20090421.092453-8.jar seems to generate:
java.lang.Exception: transaction rolled back: Batch entry 0 INSERT INTO
users (user_id) VALUES (c3583933-cc55-4007-b857-b24441cfe409) was aborted.
Call getNextException to see the cause.
at
clojure.contrib.sql.internal$transaction_STAR___4079.invoke(internal.clj:95)
at clojure.contrib.sql$do_prepared__4108.doInvoke(sql.clj:87)
at clojure.lang.RestFn.applyTo(RestFn.java:144)
I see that theres no quotes around the value, even if I change the code to
use {:user_id testing} I get VALUES (testing).
Is there something I'm missing?
...and then Buffy staked Edward. The End.
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Re: 32-bit Unicode character literals
samppi a écrit : I see. Does this mean that, if I expect to handle 32-bit characters, then I need to consider changing my character-handling functions to accept sequences of vectors instead? Also, how does (seq \ud800\udc00) work? Does it split the character into two 16-bit characters? In the REPL, it seems to return (\? \?). seq on a String returns a sequence of Java characters (16 bits values). (defn codepoints-seq [s] ; returns a seq of ints (let [s (str s) n (count s) f (fn this [i] (lazy-seq (when ( i n) (cons (.codePointAt s i) (this (.offsetByCodePoints s i 1))] (f 0))) ;; = (codepoint-seq \ud800\udc00a\ud800\udd00) ;; (65536 97 65792) -- Professional: http://cgrand.net/ (fr) On Clojure: http://clj-me.blogspot.com/ (en) --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: 32-bit Unicode character literals
On Apr 27, 2009, at 10:07 AM, samppi wrote: I see. Does this mean that, if I expect to handle 32-bit characters, then I need to consider changing my character-handling functions to accept sequences of vectors instead? The blog post touches on this and searching around on Google and Wikipedia should turn up more info. Many APIs, especially in the Character class now have versions that accept and return int arguments (in addition to versions that accept and return char arguments) to support code points beyond 0x. int is wide enough to hold any individual Unicode character. It may be convenient for you to work Strings rather than individual characters when possible. Java strings (as of 1.5) are now UTF-16 encoded. This encoding allows (legal) Unicode code points in the range 0 to 0x to be encoded as a single Java character. To represent code points outside that range, UTF-16 uses a range of code points that are illegal for a single unicode character (0xD800–0xDFFF) to encode the code point a pair of 16-bit values (Chars) called a surrogate pair. Using this encoding you can represent all strings made up of legal Unicode code points as Java strings. Also, how does (seq \ud800\udc00) work? Does it split the character into two 16-bit characters? In the REPL, it seems to return (\? \?). seq doesn't know about the UTF16 encoding. It returns a sequence of every Char even if it is part of a surrogate pair. It would be possible to write a seq implementation for strings that knows about UTF-16 and returns a sequence of Unicode code points represented as ints instead. Whether doing that is useful or not depends on what you're hoping to do with the characters. --Steve smime.p7s Description: S/MIME cryptographic signature
Re: How to call function (or Java method) using string name?
On Apr 27, 3:49 am, fft1976 fft1...@gmail.com wrote: Can there be Vars without names? Can I have a vector of Vars? Vars always have names, but you can create temporary Vars using with- local-vars. If you want to create a vector of unnamed, mutable objects, you probably want Refs or Atoms instead. -Stuart Sierra --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: AppEngine in Atlanta this week
Is there any way you could record the presentation and post it on your site? On Mon, Apr 27, 2009 at 1:36 PM, slc sari.conn...@gmail.com wrote: If you are interested in Google AppEngine and live in the Atlanta area ... Tuesday - Clojure * Who: John Hume * What: Clojure on Google AppEngine * When: Tuesday, April 28th at 7pm * Where: Norcross Group — 135 Technology Parkway, Suite 200, Norcross, GA 30092. For more details see Atlanta Clojure User Group (atlclj.org) . Wednesday - Groovy * Who: Vincent Stoessel * What: Google AppEngine and Groovy * When: Wednesday April 29, 2009 - 6:30PM * Where: Matrix Resources, 115 Perimeter Center Place NE, Suite 250, Atlanta, GA PLEASE SIGN UP on the gg-members mail list: gg-members- requ...@www.ajug.org Sari Connard --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
similar to find-first
find-first in seq_utils returns the first item in a collection where (pred item) returns logical true. I needed a function that returns the result of (pred item) instead of item. This seems to do the trick. Maybe this should be added to seq_utils. (defn find-first-result [fn coll] (first (filter #(not (nil? %)) (map fn coll -- R. Mark Volkmann Object Computing, Inc. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: The Path to 1.0
Rich, refer to the patch described by Stephen Gilardi at http://groups.google.com/group/clojure/msg/2b7dd55d9f766125 (which makes it possible to run Clojure under z/OS). Based on Steve and Laurent PETIT's comments in that thread, I gather that the UTF-8 vs platform-default issue has been around awhile. Is this something you want to address before 1.0? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com 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 -~--~~~~--~~--~--~---
vimclojure help
Meikel, I'm having a heck of a time getting started with VimClojure and it's probably all due to my lack of knowing vim. After a lot of poking, I got the plugin to load and got syntax highlighting working. I also have got some autocmd's in my .vimrc so that they're listed when I do a :map. I got the nailgun server running. But I can't get gvim to start a REPL in a buffer. Could you point me to some docs or give a quick howto on getting that going? Thanks, Jim --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: similar to find-first
Shouldn't this return nil ? : 1:4 user= (find-first-result false? [true]) false Maybe this definition of find-first-result may fill the gap: (defn find-first-result [pred coll] (find-first identity (map pred coll))) = 1:22 user= (find-first-result false? [true]) nil 1:23 user= (find-first-result #(when (= % 10) (* % %)) (range 20)) 100 1:24 user= (find-first-result #(when (= % 10) (* % %)) (range 9)) nil HTH, -- Laurent 2009/4/27 Mark Volkmann r.mark.volkm...@gmail.com: find-first in seq_utils returns the first item in a collection where (pred item) returns logical true. I needed a function that returns the result of (pred item) instead of item. This seems to do the trick. Maybe this should be added to seq_utils. (defn find-first-result [fn coll] (first (filter #(not (nil? %)) (map fn coll -- R. Mark Volkmann Object Computing, Inc. -- Cordialement, Laurent PETIT --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: Oddity with clojure-contrib/sql
On Apr 27, 2009, at 9:57 AM, Stephen C. Gilardi wrote: As a result of your report, I'm working on adding better error reporting on BatchUpdateException and SQLException to clojure.contrib.sql. I've added this in SVN Revision 720 of clojure-contrib. Comments welcome. --Steve smime.p7s Description: S/MIME cryptographic signature
Re: similar to find-first
find-first-result is already in core: some Mark Volkmann a écrit : find-first in seq_utils returns the first item in a collection where (pred item) returns logical true. I needed a function that returns the result of (pred item) instead of item. This seems to do the trick. Maybe this should be added to seq_utils. (defn find-first-result [fn coll] (first (filter #(not (nil? %)) (map fn coll -- Professional: http://cgrand.net/ (fr) On Clojure: http://clj-me.blogspot.com/ (en) --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
typo in clojure.org sequences page
The sequence page ( http://clojure.org/sequences ) reads : (rest coll) Returns a seq of the items after the first. Calls seq on its argument. If there are no more items, returns nil. It should state , ... returns (). HTH, -- Laurent --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: similar to find-first
2009/4/27 Christophe Grand christo...@cgrand.net: find-first-result is already in core: some OH! yes :-$ Mark Volkmann a écrit : find-first in seq_utils returns the first item in a collection where (pred item) returns logical true. I needed a function that returns the result of (pred item) instead of item. This seems to do the trick. Maybe this should be added to seq_utils. (defn find-first-result [fn coll] (first (filter #(not (nil? %)) (map fn coll -- Professional: http://cgrand.net/ (fr) On Clojure: http://clj-me.blogspot.com/ (en) --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: AppEngine in Atlanta this week
We will attempt to record the AppEngine Clojure talk. If it turns out ok, it will be posted on youtube and I will link to it from atlclj.org On Mon, Apr 27, 2009 at 10:15 AM, Robert Campbell rrc...@gmail.com wrote: Is there any way you could record the presentation and post it on your site? On Mon, Apr 27, 2009 at 1:36 PM, slc sari.conn...@gmail.com wrote: If you are interested in Google AppEngine and live in the Atlanta area ... Tuesday - Clojure * Who: John Hume * What: Clojure on Google AppEngine * When: Tuesday, April 28th at 7pm * Where: Norcross Group — 135 Technology Parkway, Suite 200, Norcross, GA 30092. For more details see Atlanta Clojure User Group (atlclj.org) . Wednesday - Groovy * Who: Vincent Stoessel * What: Google AppEngine and Groovy * When: Wednesday April 29, 2009 - 6:30PM * Where: Matrix Resources, 115 Perimeter Center Place NE, Suite 250, Atlanta, GA PLEASE SIGN UP on the gg-members mail list: gg-members- requ...@www.ajug.org Sari Connard -- Sari Connard http://www.linkedin.com/in/sariconnard --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: vimclojure help
Hi Jim, Am 27.04.2009 um 18:08 schrieb jim: I'm having a heck of a time getting started with VimClojure and it's probably all due to my lack of knowing vim. After a lot of poking, I got the plugin to load and got syntax highlighting working. I also have got some autocmd's in my .vimrc so that they're listed when I do a :map. I got the nailgun server running. But I can't get gvim to start a REPL in a buffer. Could you point me to some docs or give a quick howto on getting that going? Please note, that people reported problems with Vims 7.2. So please make sure that you have a reasonable up-to-date vim. As for the documentation: For the installation there is information in the README.txt and a screencast on kotka.blip.tv, which walks you through the steps. For the usage there is information in the doc/clojure.txt. When you copied it to the ~/.vim/doc directory, do a :helptags ~/.vim/doc. Then you get the online help via :help vimclojure. Make sure you have let clj_want_gorilla = 1 in your .vimrc. The keymappings use the LocalLeader feature of Vim. More info for this can be obtained by :help mapleader. Important to know: the default is \. So LocalLeaderef in the docs means actually \ef for the default settings. Starting the Repl would be \sr. Also important: If your file contains a ns or in-ns clause, you have to make sure, that the namespace can be loaded correctly! VC relies on Clojure for its introspection facilities. So it needs to load the namespace of the file to work correctly. If you often edit files outside the classpath, files having side-effect when being loaded or files with broken syntax you might want to disable the dynamic features with let clj_want_gorilla = 0. Hope this gets you started. If not, I need some more specific background on the actual problems/errors. Sincerely Meikel smime.p7s Description: S/MIME cryptographic signature
Re: vimclojure help
Thanks for the response. Here's specifically what's happening: I have vim 7.2, according to the :version command in gvim I start the nailgun server with: java -cp /home/jim/clojure/clojure.jar:/home/jim/clojure/ clojure.contrib/clojure-contrib.jar:/home/jim/clojure/vimclojure.jar com.martiansoftware.nailgun.NGServer 127.0.0.1 and I get the response: NGServer started on 127.0.0.1, port 2113. I start gvim and give the command :e temp.clj. temp.clj is an empty file. The :map command give this for the sr shortcut: n \sr PlugClojureStartRepl In normal mode, when I type \sr, I get a beep when I type the 'r'. In the bash shell, when I execute ng ng-stop, the ng server shutsdown. So what am I missing? Thanks, Jim --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: How to call function (or Java method) using string name?
There's a section on the wiki with almost the exact same title: http://en.wikibooks.org/wiki/Clojure_Programming/Examples#Invoking_Java_method_through_method_name_as_a_String If I'm understanding the question correctly that should do what you're wanting to do. -Rich On Sun, Apr 26, 2009 at 11:50 AM, timc timgcl...@gmail.com wrote: Thanks Stuart. I have figured out another way, which is much more general (and uses the lowest level of how Clojure works). (defn evalStr [s] (clojure.lang.Compiler/eval (clojure.lang.RT/ readString s))) will (attempt to) execute any valid form (i.e. the string that is the source of the form). Thus: (evalStr (+ 1 2)) -- 3 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: vimclojure help
I forgot to say that I have: let clj_want_gorilla = 1 in my .vimrc On Apr 27, 12:08 pm, Meikel Brandmeyer m...@kotka.de wrote: Hi Jim, Am 27.04.2009 um 18:08 schrieb jim: I'm having a heck of a time getting started with VimClojure and it's probably all due to my lack of knowing vim. After a lot of poking, I got the plugin to load and got syntax highlighting working. I also have got some autocmd's in my .vimrc so that they're listed when I do a :map. I got the nailgun server running. But I can't get gvim to start a REPL in a buffer. Could you point me to some docs or give a quick howto on getting that going? Please note, that people reported problems with Vims 7.2. So please make sure that you have a reasonable up-to-date vim. As for the documentation: For the installation there is information in the README.txt and a screencast on kotka.blip.tv, which walks you through the steps. For the usage there is information in the doc/clojure.txt. When you copied it to the ~/.vim/doc directory, do a :helptags ~/.vim/doc. Then you get the online help via :help vimclojure. Make sure you have let clj_want_gorilla = 1 in your .vimrc. The keymappings use the LocalLeader feature of Vim. More info for this can be obtained by :help mapleader. Important to know: the default is \. So LocalLeaderef in the docs means actually \ef for the default settings. Starting the Repl would be \sr. Also important: If your file contains a ns or in-ns clause, you have to make sure, that the namespace can be loaded correctly! VC relies on Clojure for its introspection facilities. So it needs to load the namespace of the file to work correctly. If you often edit files outside the classpath, files having side-effect when being loaded or files with broken syntax you might want to disable the dynamic features with let clj_want_gorilla = 0. Hope this gets you started. If not, I need some more specific background on the actual problems/errors. Sincerely Meikel smime.p7s 5KViewDownload --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: vimclojure help
I forgot to say that I have: let clj_want_gorilla = 1 let vimclojure#NailgunClient = /home/jim/clojure/ng in my .vimrc file. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com 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: Abstract data types in functional languages
For anybody who's still following, I've updated accessors.clj with a new
behavior. I realized assoc-in and get-in are very powerful, they work with
all sorts of collections (not just maps, duh on my part), thus now
if anything in the list of accessor symbols is not actually a
clojure.lang.Symbol, it will switch over to assoc-in/get-in. This allows
accessors to seemlessly support updating lists, vectors, etc. as well as
maps that are using something other than keywords to store properties. A non
silly example:
(ns accessors-example
(:use accessors)
(:use clojure.contrib.str-utils))
(accessors first last)
(defget name [m]
(str (acc-first m) (acc-last m)))
(defset name [m v]
(let [[first last] (re-split # v)]
(- m
(acc-first first)
(acc-last last
(acc-name {:first Bob, :last Smith}) ; - Bob Smith
(acc-name {} Bob Smith) ; - {:first Bob, :last Smith}'s
On Sun, Apr 26, 2009 at 10:27 PM, David Nolen dnolen.li...@gmail.comwrote:
GENIOUS idea Laurent ;)
Extremely terse and uniform. Also because I switched the implementation to
use multimethods, performance has jumped quite a bit. In fact if you memoize
find-accessors, the code is only a little bit slower than
update-in/assoc-in/get-in! The defset and defget macros now check to make
sure their definition only defines 2 or 1 arguments respectively.
find-accessor throws an error if you attempt to use an accessor in acc-in
that hasn't been previously defined .
The code is for now hosted here
http://github.com/swannodette/accessors/tree/master.
Does anybody care to see this in contrib? If so I'll send in my CLA :)
(comment
(accessors x y z)
; {:x 4}
(acc-x {} 4)
; 4
(acc-x {:x 4})
(defset x [m v]
(assoc (assoc m :new new) :x v))
;; {:new new, :x {:y {:z 1}}}
(acc-in {:x {:y {:z 0}}} '(x y z) 1)
;; 0
(acc-in {:x {:y {:z 0}}} '(x y z))
; {:x 4, :new new, :foo 9}
(let [z {:foo 9}]
(acc-x z 4))
; 10
(let [y {:z 10}]
(acc-z y))
; [0 1 2]
(map acc-x [{:x 0}, {:x 1}, {:x 2}])
; performance --
; ~180ms 2.53ghz MBP Core2Duo
(time (dotimes [x 10]
(assoc-in {:x {:y {:z 0}}} [:x :y :z] 1)))
; ~700ms 2.53ghz MBP Core2Duo
(time (dotimes [x 10]
(acc-in {:x {:y {:z 0}}} '(x y z) 1)))
; ~300ms 2.53ghz MBP Core2Duo
(def find-accessor (memoize find-accessor))
(time (dotimes [x 10]
(acc-in {:x {:y {:z 0}}} '(x y z) 1)))
)
On Sun, Apr 26, 2009 at 6:27 PM, Laurent PETIT laurent.pe...@gmail.comwrote:
Hello,
Maybe you should consider creating a single function with 2 arities:
with one argument, it's the getter, with two arguments, it's the
setter (that returns the new type) !
(prop-foo obj) ; -- returns the property prop-foo
(prop-foo obj newval) ; -- returns a new version of obj with prop-foo
property set to newval
Terse and uniform :-)
?
2009/4/26 David Nolen dnolen.li...@gmail.com:
You're right. The following includes code for handling this case via
setin
and getin. I've also ditched macros, because that code couldn't support
new
lexical scopes in the setter/getter definition. setin getin support
works by
dynamically resolving getters and setters, thus this is slower than
direct
access via assoc-in and get-in.
Personally I have to say now that this is written, I prefer the
terseness
of:
(set-x some-map v)
over
(assoc some-map :x v)
This
(get-x some-map)
isn't as nice as
(:x map)
But it's also more explicit about how the map is being used- that a
level
indirection is required because the implementation might change.
;; ==
(comment
(accessors x y z)
; {:x 4}
(set-x {} 4)
(defset x [m v]
(assoc (assoc m :new new) :x v))
;; {:new new, :x {:y {:z 1}}}
(setin {:x {:y {:z 0}}} '(x y z) 1)
;; 0
(getin {:x {:y {:z 0}}} '(x y z))
; {:x 4, :new new, :foo 9}
(let [z {:foo 9}]
(set-x z 4))
; 10
(let [y {:z 10}]
(get-z y))
; [0 1 2]
(map get-x [{:x 0}, {:x 1}, {:x 2}]))
(defn setter* [sym]
`(defn ~(symbol (str set- sym)) [~'m ~'v]
(assoc ~'m ~(keyword (str sym)) ~'v)))
(defn getter* [sym]
`(defn ~(symbol (str get- sym)) [~'m]
(~(keyword (str sym)) ~'m)))
(defmacro defset [sym args forms]
(let [set-sym (symbol (str set- sym))]
`(defn ~set-sym [...@args]
~...@forms)))
(defmacro defget [sym args forms]
(let [get-sym (symbol (str get- sym))]
`(defn ~get-sym [...@args]
~...@forms)))
(defn find-accessor [sym acc-type]
(let [ns (or (namespace sym)
(str *ns*))
sym-name (name sym)]
(find-var (symbol ns (str (name acc-type) - sym-name)
(defn setin [m [sym syms] v]
(let [setter (find-accessor sym :set)
getter (find-accessor sym :get)]
(if syms
(setter m (set-in (getter m) syms v))
(setter m v
(defn getin [m [sym
Re: PeepCode screencast
Yeah, I agree that it was pretty good. I like that you have a non-trivial working application at the end of it. My one criticism is that it's too hard to try to follow along and write the code as you go because there are too many changes from each step to step that aren't discussed in the screencast, you just have to look at the code. Also, it does glaze over too many topics to be useful for a beginner, so I'm not sure that explaining some basic concepts as they come up but not others does anyone any good. Stu's book is much better for a beginner, but if you have been doing Clojure for a little while, this is a great screencast. On Mon, Apr 27, 2009 at 6:51 AM, Jennifer Morgan jennifermorgan2...@gmail.com wrote: I though the screen cast was really very good,especially as it gives a good overview of how to break up your code and about packaging. It does go a bit quick, but I found that by re-watching + reading the code at the same time very helpful. It a useful demo to see the power and conciseness of clojure ;-) On 26/04/2009, Andrew Wagner wagner.and...@gmail.com wrote: Just to provide a review - I must say, I really wanted to like this screencast, and failed, unfortunately. It tries to cover everything from what is functional programming? (tracing through passing functional arguments, and basic map/reduce stuff, for example) to the intricacies of STM use and clojure syntax/semantics. While all of these are worthwhile talks, trying to cover all of them in an hour means flying through them and really barely getting into any of them. On Fri, Apr 24, 2009 at 1:03 PM, Phil Hagelberg p...@hagelb.org wrote: I'm proud to announce that the Functional Programming with Clojure PeepCode screencast has just been published: http://peepcode.com/products/functional-programming-with-clojure It's a professionally-produced 65-minute video that introduces all the foundational concepts of Clojure by stepping through the creation of a multiplayer text adventure game. If you've been looking for a quick way to get up to speed on Clojure, this is your ticket. The screencast is sold for $9, and there's a preview available: http://peepcode.com/system/uploads/2009/peepcode-clojure-preview.mov Hope you like it! -Phil Hagelberg http://technomancy.us --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: PeepCode screencast
I can agree with that, for the most part. But if you've been doing clojure for a while, why cover basic syntax, basic map/reduce stuff, etc.? The time could have been spent more usefully. It just failed to pick an audience and stick with it, that's all. On Mon, Apr 27, 2009 at 2:45 PM, Paul Barry pauljbar...@gmail.com wrote: Yeah, I agree that it was pretty good. I like that you have a non-trivial working application at the end of it. My one criticism is that it's too hard to try to follow along and write the code as you go because there are too many changes from each step to step that aren't discussed in the screencast, you just have to look at the code. Also, it does glaze over too many topics to be useful for a beginner, so I'm not sure that explaining some basic concepts as they come up but not others does anyone any good. Stu's book is much better for a beginner, but if you have been doing Clojure for a little while, this is a great screencast. On Mon, Apr 27, 2009 at 6:51 AM, Jennifer Morgan jennifermorgan2...@gmail.com wrote: I though the screen cast was really very good,especially as it gives a good overview of how to break up your code and about packaging. It does go a bit quick, but I found that by re-watching + reading the code at the same time very helpful. It a useful demo to see the power and conciseness of clojure ;-) On 26/04/2009, Andrew Wagner wagner.and...@gmail.com wrote: Just to provide a review - I must say, I really wanted to like this screencast, and failed, unfortunately. It tries to cover everything from what is functional programming? (tracing through passing functional arguments, and basic map/reduce stuff, for example) to the intricacies of STM use and clojure syntax/semantics. While all of these are worthwhile talks, trying to cover all of them in an hour means flying through them and really barely getting into any of them. On Fri, Apr 24, 2009 at 1:03 PM, Phil Hagelberg p...@hagelb.org wrote: I'm proud to announce that the Functional Programming with Clojure PeepCode screencast has just been published: http://peepcode.com/products/functional-programming-with-clojure It's a professionally-produced 65-minute video that introduces all the foundational concepts of Clojure by stepping through the creation of a multiplayer text adventure game. If you've been looking for a quick way to get up to speed on Clojure, this is your ticket. The screencast is sold for $9, and there's a preview available: http://peepcode.com/system/uploads/2009/peepcode-clojure-preview.mov Hope you like it! -Phil Hagelberg http://technomancy.us --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: Oddity with clojure-contrib/sql
The table def was: CREATE TABLE users ( user_id VARCHAR(255) NOT NULL, msisdn VARCHAR(255), date_created timestamp with time zone NOT NULL, date_verified timestamp with time zone NOT NULL ); I'll try to build it up as a test case tonight. On Tue, Apr 28, 2009 at 1:57 AM, Stephen C. Gilardi squee...@mac.comwrote: That code looks right to me. What is the definition of the users table? Could you please post a minimal complete example that shows the problem? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Stack Overflow problem with Maps
Hi, I am working with a very long list and populating it to a map. What i have is three pieces of data from the list; -Row Number -Heading info List -Actual Info List note: both the Heading Info List and Actual Info List have the same number of elements as each heading name will have a corresponding actual value. I define a headingnamelist which is a list of headings to be used to generate the keys. I iterate through the list and for each row look up each of the heading names in the Heading Info List to get an index of where a particular element should be in the Actual Info List and then i go and get this from the Actual Info List and use this as part of my key. With the key i write the Row Number to the map. If the key is already there i just cons it to the exiting map value. As i said it is quite a large list and i keep getting a stack overflow. For comparison purposes i ran a similar program in python and it ran in a matter of seconds. Has anybody any ideas why this is happening? tks, PJ --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: vimclojure help
Hi, Am 27.04.2009 um 19:56 schrieb jim: I forgot to say that I have: let clj_want_gorilla = 1 let vimclojure#NailgunClient = /home/jim/clojure/ng in my .vimrc file. That's clear. Otherwise you wouldn't have the mapping in the :map output. I'm a bit confused about the beep... There is no error message of some kind? You can also check this with :messages. Sincerely Meikel smime.p7s Description: S/MIME cryptographic signature
Re: vimclojure help
The lack of error message stuck me as well. The result of :messages simply lists Bram Molenaar as the messages maintainer. I also mapped \ab to a so that it would enter insert mode and that worked fine. So I don't think it's a problem with the mapping. I'm guessing the plugin isn't fully loaded or something. Is there a way to check that? Perhaps a way to attempt to start the REPL from the command prompt? Jim Meikel Brandmeyer wrote: Hi, Am 27.04.2009 um 19:56 schrieb jim: I forgot to say that I have: let clj_want_gorilla = 1 let vimclojure#NailgunClient = /home/jim/clojure/ng in my .vimrc file. That's clear. Otherwise you wouldn't have the mapping in the :map output. I'm a bit confused about the beep... There is no error message of some kind? You can also check this with :messages. Sincerely Meikel --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com 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: similar to find-first
On Apr 27, 11:22 am, Christophe Grand christo...@cgrand.net wrote: find-first-result is already in core: some As an aside, I would have liked (some pred coll) to return the item that makes the pred true and the current implementation of `some to be renamed `any? so that we would have the following: (any? odd? [2 4 5 12]) ;; result is true (every? odd? [3 5 6 13]) ;; result is false (not-any? odd? [2 4 5 12]) ;; result is false (not-every? odd? [3 5 6 13]) ;; result is true (some odd? [2 4 5 12]) ;; result is 5 Mathematically, for the first four, (Ex in [2 4 5 12])(x is odd) (Ax in [3 5 6 13])(x is odd) ~(Ex in [2 4 5 12])(x is odd) ~(Ax in [3 5 6 13])(x is odd) --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: Stack Overflow problem with Maps
Can you post your code, always helpful :) On Mon, Apr 27, 2009 at 4:07 PM, fitzpatrick...@googlemail.com fitzpatrick...@googlemail.com wrote: Hi, I am working with a very long list and populating it to a map. What i have is three pieces of data from the list; -Row Number -Heading info List -Actual Info List note: both the Heading Info List and Actual Info List have the same number of elements as each heading name will have a corresponding actual value. I define a headingnamelist which is a list of headings to be used to generate the keys. I iterate through the list and for each row look up each of the heading names in the Heading Info List to get an index of where a particular element should be in the Actual Info List and then i go and get this from the Actual Info List and use this as part of my key. With the key i write the Row Number to the map. If the key is already there i just cons it to the exiting map value. As i said it is quite a large list and i keep getting a stack overflow. For comparison purposes i ran a similar program in python and it ran in a matter of seconds. Has anybody any ideas why this is happening? tks, PJ --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: Stack Overflow problem with Maps
Unless you provide some kind of isolated source code that reproduces the problem, I don't think it is going to be easy to help you out. But try adding (doall ..) to some your map calls and others. Even better, look at this excellent explanation why this might be happening by Cristophe Grand: http://groups.google.com/group/clojure/browse_frm/thread/43f9a716f1f91f5d# Also check whether you don't have recursive functions (replace them with loop/recur), or mutually recursive ones (for them, you would have to use mutual exclusion). But I doubt that was the problem, more likely the default lazy mode of clojure, and what Cristophe was talking about is probably connected to your problem. On Apr 27, 1:07 pm, fitzpatrick...@googlemail.com fitzpatrick...@googlemail.com wrote: Hi, I am working with a very long list and populating it to a map. What i have is three pieces of data from the list; -Row Number -Heading info List -Actual Info List note: both the Heading Info List and Actual Info List have the same number of elements as each heading name will have a corresponding actual value. I define a headingnamelist which is a list of headings to be used to generate the keys. I iterate through the list and for each row look up each of the heading names in the Heading Info List to get an index of where a particular element should be in the Actual Info List and then i go and get this from the Actual Info List and use this as part of my key. With the key i write the Row Number to the map. If the key is already there i just cons it to the exiting map value. As i said it is quite a large list and i keep getting a stack overflow. For comparison purposes i ran a similar program in python and it ran in a matter of seconds. Has anybody any ideas why this is happening? tks, PJ --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
areduce flaw
Hello all, It seems to me that areduce can not be used with an anonymous array. Consider: (areduce (.. System getProperties values toArray) i r 0 (some_expression)) It seems to me that there is no way to get i'th element of the array in (some_expression) other than let'-ing it first. It would be nice to be able to pass the name for the current element or define a local macro that expands to (aref #a i) - here #a is a gensym for the array itself ... Thought? Boris --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: Stack Overflow problem with Maps
Hi,
Here is the code. Each row of data is a string with @ between the
three types of data i mentioned.
-Row Number
-Heading info List
-Actual Info List
The Heading Info List is created by splitting on , as is the Actual
info list.
tks,
PJ
(import '(java.io InputStreamReader OutputStreamWriter))
(use '[clojure.contrib.duck-streams])
(import '(java.io File))
(def my-row-data-file e:/SoccerData/rowdata.txt)
(def my-map-file e:/SoccerData/map-data.txt)
(defn get-idx-of [inp-data inp-name]
(loop [my-count 0 inner-data inp-data]
(cond
(= (count inner-data) 0) -1
(= inp-name (first inner-data)) my-count
:else
(recur (+ 1 my-count) (rest inner-data))
)
)
)
(defn do-the-date-bigint [inp-date-string]
(let [date-array (.split inp-date-string /)]
(str20 (nth date-array 2)
(nth
date-array 1)
(nth
date-array 0)
)
)
)
;;
(defn get-key-instance [inp-key-names inp-row-data]
(loop [my-inner-vector (first inp-key-names) inner-key-names (rest
inp-key-names)]
(cond
(= (count inner-key-names) 0) (cons inp-key-names (vec
(reverse my-
inner-vector)))
:else
(let [index-row (get-idx-of (nth inp-row-data 1) (first
inner-key-
names))]
(if (== index-row -1) ()
(recur (cons (nth (last inp-row-data) index-row)
my-inner-vector)
(rest
inner-key-names)
)
)
)
)
)
)
(defn produce-date-rn-array [inp-row-data]
(try
[(do-the-date-bigint (nth (nth inp-row-data 2) (get-idx-of (nth inp-
row-data 1) Date)))
(nth inp-row-data 0)] (catch Exception e []
)
)
)
(defn update-map-list [inp-map inp-new-array inp-row-data inp-key-
names-list]
(loop [inner-key-names-list inp-key-names-list inner-map inp-map]
(cond
(= (count inner-key-names-list) 0) inner-map
:else
(let [inner-key-instance (get-key-instance (first
inner-key-names-
list) inp-row-data)]
(recur
(rest inner-key-names-list)
(assoc-in inner-map inner-key-instance
(sort-by #(first %) (cons inp-new-array
(get-in inner-map inner-
key-instance)))
)
)
)
)
)
)
(defn process-row-str[inp-row-str]
(loop [inner-array (rest (.split inp-row-str @)) inner-list [(first
(.split inp-row-str @))]]
(cond
(= (count inner-array) 0) (reverse inner-list)
:else
(recur (rest inner-array)
(cons (.split (first
inner-array) ,) inner-list)
)
)
)
)
(defn process-row-data-file [inp-key-names-list]
(with-open [rdr (reader my-row-data-file)]
(loop [inner-row-data (line-seq rdr) my-inner-map {}]
(cond
(= (count inner-row-data) 0) my-inner-map
:else
(recur (rest inner-row-data)
(update-map-list my-inner-map
(produce-date-rn-array
(process-row-str (first inner-
row-data)))
(process-row-str (first
inner-row-data))
inp-key-names-list
)
)
)
)
)
)
On Apr 27, 9:34 pm, Dimiter \malkia\ Stanev mal...@gmail.com
wrote:
Unless you provide some kind of isolated source code that reproduces
the problem, I don't think it is going to be easy to help you out.
But try adding (doall ..) to some your map calls and others.
Even better, look at this excellent explanation why this might be
happening by Cristophe
Re: vimclojure help
I think in my attempt to fix the problem, I masked a symptom. When I saw that I didn't have the key mappings, I added some autocmds to my .vimrc. From reading the vim plugin, I believe those should have been generated automatically when a *.clj file is loaded. Removing those autocmds from the .vimrc and the mappings go away. Reading the vimclojure plugin, I see that it checks for the existence of b:vimclojure_namespace before adding those mappings. When I do a :echo b:vimclojure_namespace, I get an undefined variable error. Jim On Apr 27, 3:09 pm, Meikel Brandmeyer m...@kotka.de wrote: Hi, Am 27.04.2009 um 19:56 schrieb jim: I forgot to say that I have: let clj_want_gorilla = 1 let vimclojure#NailgunClient = /home/jim/clojure/ng in my .vimrc file. That's clear. Otherwise you wouldn't have the mapping in the :map output. I'm a bit confused about the beep... There is no error message of some kind? You can also check this with :messages. Sincerely Meikel smime.p7s 5KViewDownload --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: vimclojure help
Hi, Am 27.04.2009 um 22:18 schrieb jim: The lack of error message stuck me as well. The result of :messages simply lists Bram Molenaar as the messages maintainer. I also mapped \ab to a so that it would enter insert mode and that worked fine. So I don't think it's a problem with the mapping. I'm guessing the plugin isn't fully loaded or something. Is there a way to check that? Perhaps a way to attempt to start the REPL from the command prompt? You can do a: :call vimclojure#Repl.New(). Did you install the vimplugin by defining vimdir in local.properties and using ant install? Sincerely Meikel smime.p7s Description: S/MIME cryptographic signature
Re: The Path to 1.0
New patch with corrections posted to google code,
regards,
--
laurent
2009/4/27 Laurent PETIT laurent.pe...@gmail.com:
I've created issue 110 with the patch attached in clojure's google code
project.
Hi Rich, Howard,
I'll answer to both at the same time, trying to reconcile things a bit.
Howard, my first patch was already along the lines of what you
described below, I think (concerning the fact to use ant to generate
with filters from templates).
Then Rich asked if it was possible to not have to generate files. I
understand this question a little less broadly than not generate
files at all cost, but not generate files in the source code. So
that if the generation step is not followed by some tool for some
reason, things don't break - at compile time or run time -.
That's why I came up with this new version:
* a src/clj/clojure/version.properties file
* this version.properties file is the reference for version numbers.
It is on the classpath so it can be seen by clojure at runtime. It is
in a subdirectory of clojure-the-project so any tool can refer to it
relatively to the installation of clojure.
* I've added the needed code to clojure to load clojure version
number at startup time
I've also added function (clojure.core/clojure-version) that will
return a string representing the version from the structured
*clojure-version* map. The algorithm here is simple:
MAJOR.MINOR[.INCREMENT][-QUALIFIER][-SNAPSHOT]
* I've changed the ant build.xml so that it creates fully qualified
names with version attributes for the generated jars.
* Note on the :interim attribute: to protect the person who makes
releases from itself, instead of considering :interim to be true if
there is the true string in the properties file, I've made the
opposite choice: interim is true for any value other than false. So
if there is a typo in version.properties (e.g. tru instead of true),
then the release will be marked as interim, and that will not be a big
deal. In the other case, it would be a big deal if an official release
was made accidentally instead of an interim.
* finally, pom.xml file is now generated from ant as part of the
classic init step.
Note: I strongly suggest that the clojure.version.interim property
remains true in svn, so that it's not possible to inadvertently
release a version too early.
HTH,
Feel free to use or not,
--
Laurent
2009/4/24 Howard Lewis Ship hls...@gmail.com:
Another option is for the version number to be in build.xml, and for
it to generate a runtime file (so that Clojure can know its own
version number) and set the version number inside a generated pom.xml.
You can use Ant resource copying with filters to accomplish both
these goals.
On Thu, Apr 23, 2009 at 8:24 AM, Laurent PETIT laurent.pe...@gmail.com
wrote:
2009/4/23 Rich Hickey richhic...@gmail.com:
On Apr 22, 12:41 pm, Laurent PETIT laurent.pe...@gmail.com wrote:
2009/4/22 Rich Hickey richhic...@gmail.com:
[...]
{:major 1, :minor 0, :incremental 0, :qualifier :rc1 :interim true}
for interim versions and
{:major 1, :minor 0, :incremental 0}
for releases. :interim tracks the SNAPSHOT segment of the version
string.
[...]
I don't mind the build producing clojure-1.0.0.jar etc, but it doesn't
now. The master build is Ant. Where is the best place to put the
version info so it can be leveraged by Ant, Maven and the clojure core
runtime in order to produce *clojure-version* ?
Here a patch that allows to initialize from ant and from a file
version.properties the values in *clojure-version*.
The patch only addresses the problematic of having a single place for
version attributes.
Having the ant build also use these properties for creating correctly
numbered jars is not part of the patch.
Note that I had to create a new file, src/clj/clojure/core_version.clj
, which is created by ant as a combination of template file
core_version-template.clj and the properties from version.properties.
You'll see that if you don't like the names of the keys in
version.properties, build.xml is the single place where to change them
(apart from version.properties, of course).
Also, if you don't like the name version.properties (e.g. if it should
be named project.properties or whatever for easing maven users), then
you just have to change its occurence in build.xml too.
If you like it, it can file an issue to google code and attach the patch,
Thanks!
I can't say I love the idea of generating a file during build.
Me too, that's why I have made the file as short and independent as
possible.
Well, I tried to keep close to the idea of having the version numbers
built-in, similarly to what was commited where it was also not read
from a simpler file at load time.
What about clojure.jar containing a properties file it reads at load time?
Why not, indeed ? The file would have to placed in the classpath, e.g.
in directory
Re: areduce flaw
I suspect I will be asking more questions, so in order not to start another thread I will post below :) Why ((comp - +) -3 -4) = 7 but ((comp Math/abs +) -3 -4) = Error? java.lang.Exception: No such namespace: Math (NO_SOURCE_FILE:1) [Thrown class clojure.lang.Compiler$CompilerException] and ((comp #(Math/abs %) +) -3 -4) = 7 Is there an inherent difference between java and clojure functions, so Java functions can't be passed as arguments? Or am I missing something? How can I pass a static java function to another function? A member function must be trickier because this must be supplied, but perhaps a macro can be created that results in a function that would capture this and call the member function appropriately ... Thank you, Boris On Apr 27, 4:26 pm, Boris Mizhen bo...@boriska.com wrote: Hello all, It seems to me that areduce can not be used with an anonymous array. Consider: (areduce (.. System getProperties values toArray) i r 0 (some_expression)) It seems to me that there is no way to get i'th element of the array in (some_expression) other than let'-ing it first. It would be nice to be able to pass the name for the current element or define a local macro that expands to (aref #a i) - here #a is a gensym for the array itself ... Thought? Boris --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: vimclojure help
Hi, Am 27.04.2009 um 22:50 schrieb jim: Reading the vimclojure plugin, I see that it checks for the existence of b:vimclojure_namespace before adding those mappings. When I do a :echo b:vimclojure_namespace, I get an undefined variable error. Please try the following from outside vim: ng de.kotka.vimclojure.nails.NamespaceOfFile some.clj For an empty file this should return user, for a file with ns or in-ns it should return the namespace. Does this work? Sincerely Meikel smime.p7s Description: S/MIME cryptographic signature
Re: areduce flaw
Hi, Am 27.04.2009 um 23:17 schrieb Boris Mizhen: ((comp #(Math/abs %) +) -3 -4) = 7 How can I pass a static java function to another function? Here you already gave the answer to your question. Wrap it in a Clojure fn/#(). A member function must be trickier because this must be supplied, but perhaps a macro can be created that results in a function that would capture this and call the member function appropriately ... #(.someMethod an-object %) Or passing in the object: #(.someMethod %1 %2) For apply and friends one needs a more elaborate way. Search for rhickey jcall site:paste.lisp.org. Sincerely Meikel smime.p7s Description: S/MIME cryptographic signature
hashmap default values
Is there something in core or contrib that supports creating a map where gets on undefined keys return a specified default value? For example, I'd like to create a hashmap where the default value for missing keys is zero. -- R. Mark Volkmann Object Computing, Inc. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: hashmap default values
Hi Mark,
Am 27.04.2009 um 23:42 schrieb Mark Volkmann:
Is there something in core or contrib that supports creating a map
where gets on undefined keys return a specified default value? For
example, I'd like to create a hashmap where the default value for
missing keys is zero.
You can specify the default value when retrieving the value:
(def m {:a 1 :b 2})
(get m :c 0) = 0
(m :c 0) = 0 (untested)
maybe also: (:c m 0) = 0 (also untested)
Sincerely
Meikel
smime.p7s
Description: S/MIME cryptographic signature
Re: areduce flaw
Hi Meikel, thanks for the answer. I wonder if someone could explain or point me to the explanation about *why* a Java static fn can't be passed just like a closure fn? After all the syntax to call them is the same :) Thanks, Boris On Apr 27, 5:34 pm, Meikel Brandmeyer m...@kotka.de wrote: Hi, Am 27.04.2009 um 23:17 schrieb Boris Mizhen: ((comp #(Math/abs %) +) -3 -4) = 7 How can I pass a static java function to another function? Here you already gave the answer to your question. Wrap it in a Clojure fn/#(). A member function must be trickier because this must be supplied, but perhaps a macro can be created that results in a function that would capture this and call the member function appropriately ... #(.someMethod an-object %) Or passing in the object: #(.someMethod %1 %2) For apply and friends one needs a more elaborate way. Search for rhickey jcall site:paste.lisp.org. Sincerely Meikel smime.p7s 5KViewDownload --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: areduce flaw
no, the syntax is not the same. user= (macroexpand-1 '(.foo bar)) (. bar foo) On Mon, Apr 27, 2009 at 2:51 PM, Boris Mizhen bo...@boriska.com wrote: Hi Meikel, thanks for the answer. I wonder if someone could explain or point me to the explanation about *why* a Java static fn can't be passed just like a closure fn? After all the syntax to call them is the same :) Thanks, Boris On Apr 27, 5:34 pm, Meikel Brandmeyer m...@kotka.de wrote: Hi, Am 27.04.2009 um 23:17 schrieb Boris Mizhen: ((comp #(Math/abs %) +) -3 -4) = 7 How can I pass a static java function to another function? Here you already gave the answer to your question. Wrap it in a Clojure fn/#(). A member function must be trickier because this must be supplied, but perhaps a macro can be created that results in a function that would capture this and call the member function appropriately ... #(.someMethod an-object %) Or passing in the object: #(.someMethod %1 %2) For apply and friends one needs a more elaborate way. Search for rhickey jcall site:paste.lisp.org. Sincerely Meikel smime.p7s 5KViewDownload -- And what is good, Phaedrus, And what is not good— Need we ask anyone to tell us these things? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: special handling of :type in meta data
Konrad, Thanks for the guidance, this makes a lot of sense - I was planning to provide a method for printing these objects in the future anyway. A bit of background: I'm trying to put together a simple framework that uses structures to represent business-domain objects read from a database, similar to the object persistence mechanisms available in JPA, etc. The members of each structure hold the persistent data for the object and I was thinking of using meta data to store ancillary information such as object type, a reference to the context in which the object was loaded and the state of the object (e.g. whether it is consistent with the database or not). A working system would likely have hundreds of thousands of such structures loaded into memory and as such memory usage is a significant concern. By including state data in the meta data, I make it more difficult to share meta data between objects (though maybe interning might be an option?) Alternatively, I could use the meta data for the information that is more or less static (type and context) and make the state part of the main structure data. I'm tending towards the former approach due to the fact that two objects with the same data in different states should still probably be viewed as 'equal' On Apr 27, 9:06 am, Konrad Hinsen konrad.hin...@laposte.net wrote: On 27.04.2009, at 09:42, Meikel Brandmeyer wrote: AFAIU, struct-maps are not an optimisation for efficiency of the key lookup, but for the storage space of the keys. So timings should probably read memstats. If memory is the issue, then creating a single instance of the metadata map for all values of a type should be sufficient. As for timing, key lookup is faster for struct maps than for standard maps if the number of keys defined in the struct is much smaller than the total number of keys in the map. This is probably not the case for most real-life metadata maps. Key lookup can be improved even more using accessor functions, but that would imply relying on the metadata being a struct-map for a given struct, which doesn't look like a great idea. 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 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: areduce flaw
On Apr 27, 5:51 pm, Boris Mizhen bo...@boriska.com wrote: I wonder if someone could explain or point me to the explanation about *why* a Java static fn can't be passed just like a closure fn? The only reason I can give you is that Java methods aren't first-class objects, like Clojure fns. The (.method object) and (SomeClass/method ...) forms are syntactic sugar, that expand to a special form: user (macroexpand '(.method object argument)) (. object method argument) user (macroexpand '(Class/method argument)) (. Class method argument) Perhaps the compiler could automatically wrap Java methods when they are used as a value, but that might not be easy or efficient to implement. -Stuart Sierra --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Would it be worth rewriting a parser library to use monads?
I have a library called FnParse, and I'm wondering if I should rewrite it using monads. (You can see FnParse's documentation at http:// wiki.github.com/joshua-choi/fnparse and its implementation at http:// github.com/joshua-choi/fnparse/blob/ 065cc97da4c368e10d901edacbe885bd3a8443a1/src/name/choi/joshua/ fnparse.clj.) It implements a bunch of rule functions that consume tokens: Sequence of tokens - [a new product from the consumed tokens, remaining tokens] Right now, my basic rule-combining functions use loops over the rules to be combined. Now, I've been reading the Clojure monad introductions that have been popping up around, and some things that struck me as interesting were that parsers could be elegantly implemented using monads, and that monads were modular and combinable. I don't know enough about monads, though, to know if it'd be worth trying to rewrite my library in it. It seems like if do that, people may be able to directly use the new monads in their own monads, but I'm not sure. My library is working fine as of now—would it be worth it to add monads to 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 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: areduce flaw
How can I pass a static java function to another function? There is also memfn: (memfn name args) Macro Expands into code that creates a fn that expects to be passed an object and any args and calls the named instance method on the object passing the args. Use when you want to treat a Java method as a first- class fn. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: Would it be worth rewriting a parser library to use monads?
Monads are a great thing to learn because they can be used in so many ways to make code simpler and more modular. But, they require an investment of time to understand. You'll definitely be a better programmer by trying to understand them. I'd say go for it, but realize that it's going to be a steep learning curve at first. Jim On Apr 27, 5:48 pm, samppi rbysam...@gmail.com wrote: I have a library called FnParse, and I'm wondering if I should rewrite it using monads. (You can see FnParse's documentation at http:// wiki.github.com/joshua-choi/fnparse and its implementation at http:// github.com/joshua-choi/fnparse/blob/ 065cc97da4c368e10d901edacbe885bd3a8443a1/src/name/choi/joshua/ fnparse.clj.) It implements a bunch of rule functions that consume tokens: Sequence of tokens - [a new product from the consumed tokens, remaining tokens] Right now, my basic rule-combining functions use loops over the rules to be combined. Now, I've been reading the Clojure monad introductions that have been popping up around, and some things that struck me as interesting were that parsers could be elegantly implemented using monads, and that monads were modular and combinable. I don't know enough about monads, though, to know if it'd be worth trying to rewrite my library in it. It seems like if do that, people may be able to directly use the new monads in their own monads, but I'm not sure. My library is working fine as of now—would it be worth it to add monads to 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 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: vimclojure help
That was exactly what I was reading through the vimclojure.vim plugin trying to find when I saw your post. It's a great thing to have when trying to trouble shoot problems because you can isolate the server. Anyway, I started over by wiping out my .vim and vimclojure-2.1.0 directories. Updated and rebuilt clojure and clojure-contrib. Re- downloaded and rebuilt vimclojure paying very careful attention to get all the details right. And when I ran the ng-server script, it still blew up with an error from 'find'. Finally discovered what I think is a bug in the ng-server script. The find command has a '1' between the -depth and -print0. Removing this allowed me to start the ng server with the script, which helped. But I get the following error when I do the ng command you posted: java.lang.NoClassDefFoundError: clojure/lang/APersistentMap (wrong name: clojure/proxy/clojure/lang/APersistentMap) CLASSPATH for the server is: /home/jim/vimclojure-2.1.0/build/vimclojure.jar:src CLOJURE_EXT for the server is: /home/jim/clojure /home/jim/clojure contains clojure.jar and clojure-contrib.jar. On Apr 27, 4:29 pm, Meikel Brandmeyer m...@kotka.de wrote: Hi, Am 27.04.2009 um 22:50 schrieb jim: Reading the vimclojure plugin, I see that it checks for the existence of b:vimclojure_namespace before adding those mappings. When I do a :echo b:vimclojure_namespace, I get an undefined variable error. Please try the following from outside vim: ng de.kotka.vimclojure.nails.NamespaceOfFile some.clj For an empty file this should return user, for a file with ns or in-ns it should return the namespace. Does this work? Sincerely Meikel smime.p7s 5KViewDownload --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: cannot use swig native shared libraries
Hey Antonio,
I'm getting a similar error. I wanted to call setuid from Clojure, so
I followed this link's example:
http://www2.sys-con.com/itsg/virtualcd/Java/archives/0510/Silverman/index.html
to build a java class and a shared library. I added the class to my
classpath and was able to import my UID class. But when I tried to
call the UID.setuid method, it gave me that UnsatisfiedLinkError. Did
you find a solution to your problem?
Jim
On Apr 22, 8:41 am, Antonio, Fabio Di Narzo
antonio.fa...@gmail.com wrote:
Hi all.
I'm having problems with using swig-generated wrappers with Clojure.
I'm running ubuntu-8.04-i386, gcc-4.2.4, swig-1.3.33, openjdk-1.6.0,
latest clojure release.
I've cut down a minimal reproducible example.
The swig file:
---file:swig_test.i---
%module swig_test
%{
int swig_test_whatever() {
return 3;}
%}
int swig_test_whatever();
---cut---
Compile with:
---cut---
mkdir swig_test
swig -java -package swig_test -outdir swig_test swig_test.i
javac swig_test/*.java
export JAVA_HOME=/usr/lib/jvm/java-6-openjdk
export JNI_CFLAGS=-I${JAVA_HOME}/include -I${JAVA_HOME}/include/
linux
gcc -shared ${JNI_CFLAGS} swig_test_wrap.c -o libswig_test.so
---cut---
The swig-generated java itfc file is:
---file:swig_test/swig_test.java---
package swig_test;
public class swig_test {
public static int swig_test_whatever() {
return swig_testJNI.swig_test_whatever();
}}
---cut---
The clojure code:
---cut---
(import '(swig_test swig_test))
(System/load
(.concat (System/getProperty user.dir) /libswig_test.so))
(swig_test/swig_test_whatever)
---cut---
I get:
java.lang.UnsatisfiedLinkError:
swig_test.swig_testJNI.swig_test_whatever()I (NO_SOURCE_FILE:0)
I can use manually writtenJNIwrappers with clojure and, vice-
versa, swig-generated wrappers with plain java code. What I'm missing
here? Anybody can help?
Bests,
Antonio, Fabio Di Narzo.
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Re: areduce flaw
Thanks to all who replied. To summarize what I learned - Clojure has a special form (. ) to *call* java functions, but does not have concept of a *value* corresponding to a java function. This makes Java functions a second class citizen :) In addition special forms are expanded in the first position of the list, but not on other positions, thus in (foo Math/abs) Math/abs is no longer a syntax for a static method, but a lookup of a var 'abs' in a namespace Math. Correct? Regards, Boris On Apr 27, 7:28 pm, Timothy Pratley timothyprat...@gmail.com wrote: How can I pass a static java function to another function? There is also memfn: (memfn name args) Macro Expands into code that creates a fn that expects to be passed an object and any args and calls the named instance method on the object passing the args. Use when you want to treat a Java method as a first- class fn. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: Stack Overflow problem with Maps
Hi Patrick, Please provide some code. fitzpatrick...@googlemail.com a écrit : I iterate through the list and for each row look up each of the heading names in the Heading Info List to get an index of where a particular element should be in the Actual Info List and then i go and get this from the Actual Info List and use this as part of my key. With the key i write the Row Number to the map. If the key is already there i just cons it to the exiting map value. Code smell: indexes. Most of the time, if you are using indexes there's something wrong in your code. To work with two parallel lists (heading-info-list and actual-info-list), you can either build a map (if your keys are distinct): (- (zipmap heading-info-list actual-info-list) (select-keys headingnamelist) vals) or turn the pair of lists into a list of pairs before further processing: (map vector heading-info-list actual-info-list) or directly work in parallel on both lists: (map some-fn heading-info-list actual-info-list) hth, Christophe -- Professional: http://cgrand.net/ (fr) On Clojure: http://clj-me.blogspot.com/ (en) --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
