Re: run clj file get user/counter-app error?
On Tue, Sep 13, 2011 at 10:42 PM, jayvandal s...@ida.net wrote: I am running a swing tutorial clojure program file and when I run the result is ++ user= (load-file c:/clojure-1.2.1/counter-app.clj) #'user/counter-app user= ++ What does this line mean? #'user/counter-app In the REPL, you loaded the file into the user namespace and, since your file doesn't specify a namespace, that causes counter-app to be defined in the user namespace, hence: #'user/counter-app -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: run clj file get user/counter-app error?
That line is the string representation of a Var. It isn't an error - it's just the return value of the expression you entered. (load-file) evaluates all expressions in a file and returns the value of the last one. In your case, it's the value of (defn counter-app [] ...), which defines the counter-app function. You can invoke the defined function by typing: (counter-app) Regards, Stuart On 14 September 2011 15:42, jayvandal s...@ida.net wrote: I am running a swing tutorial clojure program file and when I run the result is ++ user= (load-file c:/clojure-1.2.1/counter-app.clj) #'user/counter-app user= ++ What does this line mean? #'user/counter-app The name of my file is counter-app.clj program listing on win Vista IS -- (import '(javax.swing JLabel JButton JPanel JFrame)) (defn counter-app [] (let [counter (atom 0) label (JLabel. Counter: 0) button (doto (JButton. Add 1) (on-action evnt ;; evnt is not used (.setText label (str Counter: (swap! counter inc) panel (doto (JPanel.) (.setOpaque true) (.add label) (.add button))] (doto (JFrame. Counter App) (.setContentPane panel) (.setSize 300 100) (.setVisible true -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: N00b alert! - A question on immutable/mutable data structures...
Hi Trevor,
I hope I've understood your problem correctly.
You can modify nested structures using e.g. update-in:
(let [k user1 v 1234]
(swap! user-queues update-in k conj v))
That's assuming that a user queue already exists in the map. If it doesn't,
you could do something like:
(let [k user1 v 1234]
(swap! user-queues #(assoc % k (conj (get % k
clojure.lang.PersistentQueue/EMPTY) v
Regards,
Stuart
On 14 September 2011 11:10, Trevor tcr1...@gmail.com wrote:
Thanks for the quick responses.
I'll try to answer Andy's question: How do you know, in advance, that
it doesn't need to handle such concurrent changes? ... and at the
same time I will try to provide this example to Stuart, hoping I can
see how using a map inside an atom might work:
Let's say my users log into a web page and each user has a queue that
does stuff for them. Since the users id is unique and each user can
only be logged in from one session, when I use the user id as a key
within a hash-map then I know *well-enough* there will not be any
concurrent changes to that key value pair, particularly since enqueing
means each change is actually an just addition to the stack. -- So I
am picking queue's to make a point... -- Queue's are chosen over lists
as they are both constant time and fast. Being atomic is great, but
wouldn't making a copy of a queue and re-assembling it defeat the
purpose of using it?
So let's try this:
(def user-queues* (atom (hash-map)))
#'project/user-queues*
(swap! user-queues* assoc user1 clojure.lang.PersistentQueue/EMPTY)
{user1 #PersistentQueue clojure.lang.PersistentQueue@0}
(@user-queues* user1)
#PersistentQueue clojure.lang.PersistentQueue@0
I would like to add an item to the users queue, but it seems when
using an atom I can only swap in and out the value as opposed to
modifying the value in-place.
So let's start with just the basic atom'd queue:
(def q (atom clojure.lang.PersistentQueue/EMPTY))
#'project/q
(swap! q conj (seconds))
#PersistentQueue clojure.lang.PersistentQueue@d3232253
(apply list (swap! q conj (seconds)))
(1315961557 1315961570)
awesome.
Now I want to store each users queue in the user-queues* hash-map. How
would I do that while maintaining a real queue? My initial attempts
always lead to reading the full queue into a list, then to conj and
item on that list, then I have to remake a queue to then be stored
back into the map via swapso it's at that point I might as well
not be using a queue - right?
Certainly hash-maps with queue's would be a reasonable idea - right?.
Thanks.
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Re: N00b alert! - A question on immutable/mutable data structures...
Or: (swap! user-queues update-in [k] (fnil conj clojure.lang.PersistentQueue/EMPTY) v) 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 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: Rounding the edges of an Emacs beginner
On 09/14/2011 05:20 AM, Timothy Washington wrote: But now that I think about it, I can probably just pass a run jetty / ring form to swank to start it :) Let me know if I'm on the right path. I recently started using clojure-jack-in. lein repl made it easy to automatically execute a startup script, but complicated other things. You can of course start things from the slime-repl. For my appengine-magic using project, I tried a slime-eval-buffer on my start.clj, which mostly works, except that datastore operations will not be available from the repl (raises No API environment is registered for this thread). Maybe it doesn't matter in other cases, just noting that slime-eval-buffer and entering forms on the repl are different in outcome, regarding threads. -- Thorsten Wilms thorwil's design for free software: http://thorwil.wordpress.com/ -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
what does cake bin do?
Hi Everybody, I have tried to use the AOT compilation via cake bin . I have seen that the AOTed executable takes about 14 to 15 seconds while when run at the repl it takes about 10 to 11 seconds. While I can attribute part of the extra time to the JVM start-up time and loading clojure .. I can't attribute all of 4 to 5 seconds of extra time time to JVM startup time. Is there something else that is happening here? I didn't think posting the actual code was appropriate. I can provide the github link with instructions to use if needed. Thanks for any help... Sunil. -- 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: debugging
Also bear in mind that due to the functional nature of Clojure you can debug a lot of problems using tracing, like clojure.contrib.trace (for 1.3), C-c C-t in Emacs, or this handy macro: (defmacro dbg[x] `(let [x# ~x] (println dbg: '~x = x#) x#)) (func1 (func2 arg1) arg2) - (dbg (func1 (dbg (func2 arg1)) arg2)) Stolen from here: http://stackoverflow.com/questions/2352020/debugging-in-clojure -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com 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: debugging
On Wed, Sep 14, 2011 at 12:05 AM, Sergey Didenko sergey.dide...@gmail.com wrote: Also bear in mind that due to the functional nature of Clojure you can debug a lot of problems using tracing, like clojure.contrib.trace (for 1.3) Coming soon to 1.3! Luc Prefontaine has volunteered to maintain this library as clojure.tools.cli going forward (which will work with 1.2 and 1.3 BTW). -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: trace-forms macro
Looks interesting. Did you use it with Clojure 1.3 or earlier? -- 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
two form assert does not exist in 1.3.0-master-SNAPHOT
Despite of what written here: http://dev.clojure.org/display/doc/1.3 there is no two form assert in 1.3.0-master-SNAPHOT -- 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: Overtone 0.3 released
I should also mention that we have a cheat sheet too: http://cloud.github.com/downloads/overtone/overtone/overtone-cheat-sheet.pdf Thanks to Steve Tayon for such an excellent template. Sam --- http://sam.aaron.name On 13 Sep 2011, at 00:03, Sam Aaron wrote: Hey everyone, I've just pushed out a shiny new Overtone release to Clojars. Although it's only been a little over a month since the last release, there's been quite a lot of work committed that it definitely warranted a new number and a little release party! So update your music project dependencies to 0.3.0, sync your deps and start playing with the new functionality. A great place to start is the new algorithmic piano example: https://github.com/overtone/overtone/blob/master/test/example/extemp_piano.clj So, what's happened? Well, the key highlights are: * An example system * Binary/Unary UGen documentation * The unification of Binary/Unary UGen calling semantics with standard UGen fns. * A selection of interesting new algo/music fns * Useful UGen documentation lookup fns: ug-doc, find-ug, find-ug-doc More detailed highlights are as follows: https://github.com/overtone/overtone/blob/master/CHANGELOG.md Enjoy! Sam --- http://sam.aaron.name -- 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: Problem with insert-values (clojure.contrib.sql)
Yes, if I understand it correctly, instead of db, I just use the pooled-db It would be good to have an example that connects the pooled db stuff with the normal db stuff. (defn db-update-or-insert Updates or inserts a fruit [record] (sql/with-connection pooled-db (sql/update-or-insert-values :fruit [name=? (:name record)] record))) -- 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: Rounding the edges of an Emacs beginner
Hi, just a few follow-ups... On Wednesday, September 14, 2011 4:13:47 AM UTC+2, frye wrote: - ? howto list modes engaged Aside from the already mentioned C-h m (aka M-x describe-mode) you will want to use * C-h k (M-x describe-key) followed by some keybinding to find out what that keybinding does * C-h w (M-x where-is) followed by the name of some command to find out what keybinding exists for that command * C-h a PATTERN (M-x apropos) to search for PATTERN in command names and variables (ah, I miss hyper-apropos from XEmacs) * C-h v VARIABLE (M-x describe-variable) to see the documentation for a variable in ELisp (use C-c C-d d on Clojure symbols to see their documentation from SLIME) * C-h f FUNCTION (M-x describe-function) to see docs for an Elisp-function * and finally C-h ? to find out what other help is available The built-in help system of Emacs is one of its greatest strengths. - ? Can you use Emacs / Slime / CDT (debugging) with Ruby / Rails ? howto do Code completion (clojure, and elisp ) Try TAB in the REPL and M-TAB in a Clojure-buffer when you are connected to a running image. As a VIM'er, I'm trying to do the following using emacs navigation, but seem to have missed the levers to pull. I'm using a vim navigation pluginhttp://gitorious.org/evil/pages/Home, which helps a lot. - ? set line numbers I use linum.el written by Markus Triska: (when (try-require 'linum) ;; try require is just a minor wrapper which checks, whether a lib is available (global-linum-mode)) - ? go to line 'n' Since my fingers are used to M-g I bind that key to goto-line : (global-set-key (kbd M-g) #'goto-line) - ? how to jump to matching parentheses Meta with left and right cursor keys. Actually those are forward-sexp and backward-sexp - ? move down a chunk like in vim What does that mean? - ? yank 'n' lines - emacs yank puts back some 'killed' text ; HOWTO copy Mark things by first enabling the mark with C-SPC. Move around using your usual command. Copy to the kill-ring with M-w or cut the text and copy it to the kill-ring using C-w. After that you can yank (Emacsspeak for 'paste') from the kill ring with C-y. Try M-y right after a C-y to get older elements on the kill-ring. For marking, try what C-M-SPC does, also hit it several times in a row. Warning: if your finger's memory learns this, using modern IDEs may feel awkward. Regards, Stefan -- 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: two form assert does not exist in 1.3.0-master-SNAPHOT
Hi, current master seems to disagree with you: https://github.com/clojure/clojure/blob/master/src/clj/clojure/core.clj#L4222 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 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: two form assert does not exist in 1.3.0-master-SNAPHOT
I see, my lein - maven thinks that the latest clojure-1.3.0-master-SNAPSHOT.jar was built in January. current master seems to disagree with you: https://github.com/clojure/clojure/blob/master/src/clj/clojure/core.clj#L4222 -- 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: two form assert does not exist in 1.3.0-master-SNAPHOT
I see, there is no clojure-1.3.0-master-SNAPSHOT.jar in maven and I should use 1.3.0-RC0 I see, my lein - maven thinks that the latest clojure-1.3.0-master-SNAPSHOT.jar was built in January. current master seems to disagree with you: https://github.com/clojure/clojure/blob/master/src/clj/clojure/core.clj#L4222 -- 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: two form assert does not exist in 1.3.0-master-SNAPHOT
Hi, there used to be http://build.clojure.org/snapshots, but I don't know whether it's still cared for. 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 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: Calling a Java call with array from Clojure
On any platform, calling conventions are fictions enforced at the machine code level by compilers :) It's not specific to the JVM. Luc P. On Tue, 13 Sep 2011 19:33:54 -0700 (PDT) Alan Malloy a...@malloys.org wrote: Varargs are a fiction of javac, and do not exist at the bytecode level. In real life, this method takes two args, a String and a String[]. Use into-array to create a string array, and pass that as the second arg. On Sep 13, 6:21 pm, ron peterson peterson.ron...@gmail.com wrote: I have a following API call that I need to make from Clojure: class A doSomething(java.lang.String arg1, String... args) so I tried (def a (new A)) ;this works (.doSomething a abc efg hij) ;this doesn't work giving me no matching method found: doSomething for class A -- Luc P. The rabid Muppet -- 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: two form assert does not exist in 1.3.0-master-SNAPHOT
Apparently not: 1.3.0-master-SNAPSHOT/ 20-Dec-2010 there used to be http://build.clojure.org/snapshots, but I don't know whether it's still cared for. -- 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
case on primitives warning in 1.3-RC0
Is this the intended behavior? Note the present/missing default clause user (set! *warn-on-reflection* true) user (case (rand-int 3) 0 :zero 1 :one 2 :two) Performance warning, NO_SOURCE_FILE:1 - case has int tests, but tested expression is not primitive. :two user (case (rand-int 3) 0 :zero 1 :one 2 :two :default 3) :two -- 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: trace-forms macro
It was tested with 1.2.1 Jonathan On Wed, Sep 14, 2011 at 9:09 AM, Sergey Didenko sergey.dide...@gmail.comwrote: Looks interesting. Did you use it with Clojure 1.3 or earlier? -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: case on primitives warning in 1.3-RC0
Sergey Didenko sergey.dide...@gmail.com writes: Is this the intended behavior? Note the present/missing default clause user (set! *warn-on-reflection* true) user (case (rand-int 3) 0 :zero 1 :one 2 :two) Performance warning, NO_SOURCE_FILE:1 - case has int tests, but tested expression is not primitive. :two user (case (rand-int 3) 0 :zero 1 :one 2 :two :default 3) :two The default case in `case' (what a sentence) is not paired like in `cond'. You want something like: , | user (case (rand-int 10) 0 :zero 1 :one 2 :two :other) | Performance warning, NO_SOURCE_FILE:1 - case has int tests, but tested expression is not primitive. | :other ` I think the problem with the reflection warning is that `rand-int' returns a Long. This version seems to wor: , | (case (int (rand-int 10)) |0:zero |1:one |2:two |:other) ` 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
Fund raising takes shape!
What a wonderful Clojure community! My fund raising campaign to help me attend the Conj is already half-complete. For all of those who have already contributed, I'd like to thank you again! Being part of such a supporting community fills me with joy and makes me proud. Please note I've created a dedicated page explaining the motivations behind this fund raising campaign, as well as a status indicator: http://code.google.com/p/counterclockwise/wiki/ConjTripFunding I'd like to draw your attention on a point of interest: I'm a really poor swimmer ... so I'd prefer be able to book a plane for traveling back to France. Follow me ? (twitter pun intended) :-) Cheers, -- 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 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: N00b alert! - A question on immutable/mutable data structures...
ahh,... I see. Thank you all - you've been very helpful. Trevor On Sep 14, 12:31 am, Stuart Campbell stu...@harto.org wrote: I knew there must be a nicer way to write that :) On 14 September 2011 16:22, Meikel Brandmeyer (kotarak) m...@kotka.de wrote: Or: (swap! user-queues update-in [k] (fnil conj clojure.lang.PersistentQueue/EMPTY) v) 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 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
why expressions in macro are not evaluated?
I write a simple macro and an invocation of the macro. Here is the code: (defmacro my-macro [ body] `(for [cur-date# [2011-09-04 2011-09-05]] (do ~@body) ) ) (my-macro (printf a_message\n) ) I get a_message printed twice if I paste the code in a clojure REPL. But I save the code into a file called foo.clj and use clj foo.clj to run it. I get nothing in stdout. It seems that (printf a_message \n) is not evaluated. Can anybody explain this behavior? 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
dropped into clojure and lein! compojure file for project.clj?
I have been dropped into a clojure project which was abandoned some time ago and now reactivated..So, I am picking up clojure and lein simultaneously. In every project.clj file, this compojure reference cannot be resolved. Is there another reference that is more recent? [org.clojars.stuarthalloway/compojure 0.3.3-SNAPSHOT] many thanks for any help. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Rounding the edges of an Emacs beginner
Hi Tim, back when I started diving into Clojure I had the very same plan, teach me Emacs to write Clojure. Somewhere down the road I realized that I can have almost everything, that I hoped to gain by picking up Emacs, in VIM too. VimClojure and lein-vimclojure**, once set up, delivered everything I was looking for. Ok, everything but debugging! Which, thanks to the ability to use tracing right inside a vim repl, I don't miss that much as I missed my buddies . and * back then... :-) I definitely don't want to discourage you from looking into Emacs, which without a question is a great text editor, I just wanted to note that there are working setups for VIM too. :-) Regards, Ben Am 14.09.2011 04:13, schrieb Timothy Washington: Hey all, So I'm still an avid vim user. But I see a lot of power in the swank slime setup, and have been teaching myself emacs to try to leverage it. There are still a few tricks I haven't got. Maybe my notes are just disorganised, but I was hoping fellow Clojurians can chime in. * ? getting an error when I i) M-x slime-connect or ii) send a form (+1 1) to swank ; this is after i) a lein swank then ii) in another window emacs M-x connect . ** Evaluating Slime forms seems to work after that webkell@ubuntu:~/Projects/bkell$ lein swank Listening for transport dt_socket at address: 36109 Connection opened on localhost port 4005. exception in read loop java.lang.Exception: Error reading swank message*# this happens when slime tries to connect with M-x slime-connect * at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ... at java.lang.reflect.Constructor.newInstance(Constructor.java:513) ... at clojure.lang.Var.applyTo(Var.java:518) at clojure.main.main(main.java:37) exception in control loop java.lang.InterruptedException at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.reportInterruptAfterWait(AbstractQueuedSynchronizer.java:1961) ... at swank.util.concurrent.mbox$receive.invoke(mbox.clj:28) at swank.core$control_loop.invoke(core.clj:401) ... at swank.swank$connection_serve$fn__1720.doInvoke(swank.clj:20) ... at java.lang.Thread.run(Thread.java:619) * ? howto do Code completion (clojure, and elisp ) * ? close a slime-repl connection * ? howto list modes engaged * ? Also need to increase my skills navigating the debugger. Is this still the reference http://georgejahad.com/clojure/swank-cdt.html to use * ? Can you use Emacs / Slime / CDT (debugging) with Ruby / Rails As a VIM'er, I'm trying to do the following using emacs navigation, but seem to have missed the levers to pull. I'm using a vim navigation plugin http://gitorious.org/evil/pages/Home, which helps a lot. * ? set line numbers * ? go to line 'n' * ? how to jump to matching parentheses * ? move down a chunk like in vim * ? yank 'n' lines - emacs yank puts back some 'killed' text ; HOWTO copy Thanks Tim -- 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
Neighbors function from The Joy of Clojure
Hi Guys, I'm pretty new to clojure and to the list as well - this being my 1st message - so hello everyone :) I'm going through the book The Joy of Clojure which, pardon the pun, I'm enJOYing a lot and stumbled upon this function to find neighbors of a location in a 2D matrix: (defn neighbors ([size yx] (neighbors [[-1 0] [1 0] [0 -1] [0 1]] size yx)) ([deltas size yx] (filter (fn [new-yx] (every? #( -1 % size) new-yx)) (map #(map + yx %) deltas This syntax made me scratch my head since I believe it was the first time I saw it. However, upon closer analysis it seems it could be rewritten like this, yielding the same result: (defn neighbors-1 [size yx] (let [deltas [[-1 0] [1 0] [0 -1] [0 1]]] (filter (fn [new-yx] (every? #( -1 % size) new-yx)) (map #(map + yx %) deltas The second version feels a lot easier on my eyes. Am I missing something or they are really equivalent? And if so, why is the first syntax supported or better yet, when is it best to use it? Cheers, Leonardo Borges www.leonardoborges.com -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Reuse of generic Clojure/ClojureScript code?
Hi, I have been using clojure for personal projects for a while now. I am starting to work with clojurescript. I have a number of utilities and libraries that I use in clojure. I can port much of these wholesale to clojurescript if I copy functions to cljs files. Generally, my feeling is that I would like to be able to separate generic clojure from jvm clojure from js clojure. Where generic clojure relies only on common capabilities of clojure or clojurescript. jvm clojure uses specific jvm/java libs and js clojure uses specifically js libs or capabilities. As I understand it, even if I do this, I cannot use clojurescript-compatible clj files in a clojurescript build. (i.e compile the clj file as cljs). Presumably, I could link or rename the files, but I think that in the long run this would be a maintenance challenge. Likewise for copying - if the code is meant to be the same. Does anyone have opinions about how to maximise reuse of existing generic clojure code as cljs code in this manner? ( I know you can require-macros - but this does not work for : defn - for example - unless I am mistaken) Do people feel that this sort of separation would be useful or of marginal benefit? As a corollary (if separation and reuse were possible): - it would be quite useful to he able to define a library as being intended to be generic. The compiler would raise an error if a non-generic capability was employed somewhere in the library dependencies (i.e some inter-op or platform specific lib) - and to be able to require/use a jvm or js specific implementation of a library (implementing the same api/functions) depending on the compilation context... It may be that some of this is possible with macros etc...my depth of knowledge is limited. I am interested to hear opinions... Cheers Dave -- 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: two form assert does not exist in 1.3.0-master-SNAPHOT
There are no new JARs being published at build.clojure.org. New releases (both numbered and -SNAPSHOT) are being published to oss.sonatype.org. -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
Re: Binding *out*
Hey, I don't have a comment on how *out* and *err* are implemented, but here's a solution for your particular problem. Runtime/exec returns a java.lang.Process [1] object which has getInputStream and getOutputStream methods corresponding to System/out and System/err of the spawned process respectively. So, grab those and fire off a couple of futures to copy the streams to files. A very rough sketch: (let [in (.getInputStream proc)] (future (clojure.java.io/copy in (clojure.java.io/output-stream output-file.txt repeat for getErrorStream. In fact, when you're starting processes with exec you *always* want to do something like this even if you're throwing away the output. Otherwise the stdout buffer for the spawned process will eventually fill up and it will block leaving you wondering why it randomly stopped working. HTH, Dave [1] http://download.oracle.com/javase/6/docs/api/java/lang/Process.html On Wed, Sep 14, 2011 at 9:15 AM, Nick Mudge mud...@gmail.com wrote: I have a clojure program with which I would like all stdout and stderr to be written to a file. Of course there is Unix IO redirection but I am starting my program from within another clojure program using (.exec (Runtime/getRuntime) clj-program-command env) and that doesn't support IO redirection. Of course I could use the bash -c command within the command to start my program but it does make things a bit messier with all the quotes and escaping of quotes, and anyway I would like to achieve this objective within my clojure program. I found out that System/out and System/err are separate and different than *out* and *err*. Changing *out* or *err* does not change System/ out or System/err. My program includes the Jetty server which is written in Java so it writes to System/out and System/err and not to *out* and *err*. So to change all stdout and stderr to write to a file I need to change System/out, System/err and *out* and *err*. I can do this like so in my core.clj file: (System/setOut (PrintStream. (FileOutputStream. /home/user/myproject/ log.txt true) true)) (System/setErr (PrintStream. (FileOutputStream. /home/user/myproject/ log.txt true) true)) (binding [*out* (java.io.PrintWriter. System/out) *err* (java.io.PrintWriter. System/err)] (start-my-app)) The only way I know of changing *out* and *err* is to wrap my entire program inside the binding function. I was wondering what is thought of the idea of making *out* and *err* dynamic vars? If they were dynamic I could do the following which I think is nicer and more elegant: (System/setOut (PrintStream. (FileOutputStream. /home/user/myproject/ log.txt true) true)) (System/setErr (PrintStream. (FileOutputStream. /home/user/myproject/ log.txt true) true)) (def *out* (java.io.PrintWriter. System/out)) (def *err* (java.io.PrintWriter. System/err)) Better yet, it would be nice if I changed *out* and *err* and that caused System/out and System/err to change too. So I could do: (def *out* (java.io.PrintWriter. (FileOutputStream. /home/user/ myproject/log.txt true)) (def *err* (java.io.PrintWriter. (FileOutputStream. /home/user/ myproject/log.txt true)) And System/out and System/err would also change. Thoughts? -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Binding *out*
Hi Nick, *out* and *err* are already dynamic, which is what allows `binding` to work. You can the root binding of any Var (even non-dynamic Vars) with `def` or `alter-var-root`. -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 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: dropped into clojure and lein! compojure file for project.clj?
According to http://clojars.org/compojure , the current line for project.clj is just: [compojure 0.6.5] On Tue, Sep 13, 2011 at 10:41 PM, deltag delow...@gmail.com wrote: I have been dropped into a clojure project which was abandoned some time ago and now reactivated..So, I am picking up clojure and lein simultaneously. In every project.clj file, this compojure reference cannot be resolved. Is there another reference that is more recent? [org.clojars.stuarthalloway/compojure 0.3.3-SNAPSHOT] many thanks for any help. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- 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: case on primitives warning in 1.3-RC0
Indeed. Then clojure.core/rand-int should be improved I guess. The default case in `case' (what a sentence) is not paired like in `cond'. You want something like: -- 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: Reuse of generic Clojure/ClojureScript code?
As far as I know, coming up with a solution for this under consideration. David On Wed, Sep 14, 2011 at 8:59 AM, Dave Sann daves...@gmail.com wrote: Hi, I have been using clojure for personal projects for a while now. I am starting to work with clojurescript. I have a number of utilities and libraries that I use in clojure. I can port much of these wholesale to clojurescript if I copy functions to cljs files. Generally, my feeling is that I would like to be able to separate generic clojure from jvm clojure from js clojure. Where generic clojure relies only on common capabilities of clojure or clojurescript. jvm clojure uses specific jvm/java libs and js clojure uses specifically js libs or capabilities. As I understand it, even if I do this, I cannot use clojurescript-compatible clj files in a clojurescript build. (i.e compile the clj file as cljs). Presumably, I could link or rename the files, but I think that in the long run this would be a maintenance challenge. Likewise for copying - if the code is meant to be the same. Does anyone have opinions about how to maximise reuse of existing generic clojure code as cljs code in this manner? ( I know you can require-macros - but this does not work for : defn - for example - unless I am mistaken) Do people feel that this sort of separation would be useful or of marginal benefit? As a corollary (if separation and reuse were possible): - it would be quite useful to he able to define a library as being intended to be generic. The compiler would raise an error if a non-generic capability was employed somewhere in the library dependencies (i.e some inter-op or platform specific lib) - and to be able to require/use a jvm or js specific implementation of a library (implementing the same api/functions) depending on the compilation context... It may be that some of this is possible with macros etc...my depth of knowledge is limited. I am interested to hear opinions... Cheers Dave -- 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
How to convert general recursion to loop .. recur syntax
I need help -- ideas, other places or examples to look at, etc -- in converting this function (defn skl [tree] (map skl (filter seq? tree))) to loop .. recur syntax. I've been testing it with (def test_data1 '(1 (2 3) ( ) (( )) :a)) (def test_data2 '(1 2 (3 4) (5 ( 6 7 8 I'm trying to do this without the clojure.zip library. 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
Mocking out namespaces
Say I have two name spaces, A and B, with A depending on B. I want to test namespace A, replacing module B with a mock B for testing purposes- preferably without having to load B at all (B sucks in a bunch of stuff, like dependencies on databases and external web sites and etc. that I don't want to deal with in testing). What is the easy, clojure-approved, mechanism for doing this? I tried: (ns B) ; mock defns (ns user) (require 'A) but this still load the real B, and A still calls the real B, and not the mock B. Thanks. Brian -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Neighbors function from The Joy of Clojure
Ah, got ya. Did not think of that :) Thanks for the insight! Cheers, Leonardo Borges www.leonardoborges.com On Wed, Sep 14, 2011 at 11:29 PM, Chouser chou...@gmail.com wrote: On Wed, Sep 14, 2011 at 8:58 AM, Leonardo Borges leonardoborges...@gmail.com wrote: Hi Guys, I'm pretty new to clojure and to the list as well - this being my 1st message - so hello everyone :) I'm going through the book The Joy of Clojure which, pardon the pun, I'm enJOYing a lot and stumbled upon this function to find neighbors of a location in a 2D matrix: Glad you like the book [careful avoidance of pun intended]! (defn neighbors ([size yx] (neighbors [[-1 0] [1 0] [0 -1] [0 1]] size yx)) ([deltas size yx] (filter (fn [new-yx] (every? #( -1 % size) new-yx)) (map #(map + yx %) deltas This syntax made me scratch my head since I believe it was the first time I saw it. However, upon closer analysis it seems it could be rewritten like this, yielding the same result: (defn neighbors-1 [size yx] (let [deltas [[-1 0] [1 0] [0 -1] [0 1]]] (filter (fn [new-yx] (every? #( -1 % size) new-yx)) (map #(map + yx %) deltas The second version feels a lot easier on my eyes. Am I missing something or they are really equivalent? And if so, why is the first syntax supported or better yet, when is it best to use it? The main difference is that the first version allows you to pass in your own deltas. This could be useful if you wanted to include diagonals as neighbors. We don't think we take advantage of the flexibility anywhere in the book, so perhaps your version would indeed be better. --Chouser -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Neighbors function from The Joy of Clojure
On Wed, Sep 14, 2011 at 5:58 AM, Leonardo Borges
leonardoborges...@gmail.com wrote:
(defn neighbors
([size yx] (neighbors [[-1 0] [1 0] [0 -1] [0 1]] size yx))
([deltas size yx]
(filter (fn [new-yx]
(every? #( -1 % size) new-yx))
(map #(map + yx %) deltas
This syntax made me scratch my head since I believe it was the first
time I saw it.
In case it wasn't clear from Chouser's response, the key difference is
that this declares two versions of neighbors, one that takes three
arguments and one that takes four - essentially overloading on arity.
Here's an example from some of our code at World Singles:
(defn save-row
Given a table name (string), a record and an optional
key-gen function, either insert it after applying the
key-gen function (if no pk) or update it. In both
cases, return the pk. The default key-gen function
is a no-op (identity).
When operating on a MongoDB collection, the logic is
much simpler because the pk is always :_id and key
generation is always handled by MongoDB. Also, we
always return the entire updated record (since we
can run functions against the database).
([table record](save-row table record identity :id 0))
([table record key-gen](save-row table record key-gen :id 0))
([table record key-gen pk] (save-row table record key-gen pk 0))
([table record key-gen pk retry]
...))
Mostly we call this as (save-row :table-name {:some record}) but we
can also supply a key generation function (save-row :table-name {:some
record} add-uuid), for tables that don't have a generated PK column,
and we can specify the PK name if it isn't :id (save-row :table-row
{:some record} identity :email).
Ignore retry - we need to refactor that into a private helper function
:) It's part of the machinery that let's automatically retry
operations on MongoDB if the replica set has no active primary node
since it can take a while to failover...
Hope that helps?
--
Sean A Corfield -- (904) 302-SEAN
An Architect's View -- http://corfield.org/
World Singles, LLC. -- http://worldsingles.com/
Railo Technologies, Inc. -- http://www.getrailo.com/
Perfection is the enemy of the good.
-- Gustave Flaubert, French realist novelist (1821-1880)
--
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Re: [ANN] Clojure 1.3 RC0
This compiles fine in 1.2.1, but fails in 1.3.0-RC0 (defn foo [[bar baz]] (try (if (seq baz) (if (= bar 99) (throw (Exception. FAIL)) (recur baz)) bar) (catch Exception e :fail))) You get a compiler error: java.lang.UnsupportedOperationException: Cannot recur across try I assume there is a reason for this? Or should it be considered a bug? Paul -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: [ANN] Clojure 1.3 RC0
It was unsupported behavior in 1.2.1. Now you get error sooner. David On Wed, Sep 14, 2011 at 11:45 AM, Paul Stadig p...@stadig.name wrote: This compiles fine in 1.2.1, but fails in 1.3.0-RC0 (defn foo [[bar baz]] (try (if (seq baz) (if (= bar 99) (throw (Exception. FAIL)) (recur baz)) bar) (catch Exception e :fail))) You get a compiler error: java.lang.UnsupportedOperationException: Cannot recur across try I assume there is a reason for this? Or should it be considered a bug? Paul -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: [ANN] Clojure 1.3 RC0
For unsupported behavior it seemed to work pretty well in our code :), but perhaps it was just a timebomb. In our case it was several layers of macros obscuring the recur across try. I guess we'll have to figure out how to rewrite around it, when we get around to picking up 1.3. Paul -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How to convert general recursion to loop .. recur syntax
In general, you can't convert recursion into loops. Recursion has stack frames, loops don't. I can't really tell what you are trying to do here because your example just walks the interior nodes of the expression tree, doing nothing. Can you clarify with a more complete 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: [ANN] Clojure 1.3 RC0
On Wed, Sep 14, 2011 at 8:45 AM, Paul Stadig p...@stadig.name wrote: This compiles fine in 1.2.1, but fails in 1.3.0-RC0 Intentional removal: https://github.com/clojure/clojure/blob/master/changes.txt 1.3 Disallow recur across try -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Problem with insert-values (clojure.contrib.sql)
On Wed, Sep 14, 2011 at 12:51 AM, finbeu info_pe...@t-online.de wrote: Yes, if I understand it correctly, instead of db, I just use the pooled-db It would be good to have an example that connects the pooled db stuff with the normal db stuff. Ah, that would make it clearer.. (defn db-update-or-insert Updates or inserts a fruit [record] (sql/with-connection pooled-db It would be (sql/with-connection @pooled-db .. or (sql/with-connection (db-connection) .. I like the function wrapper because it's easy to forget the deref (@). -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: why expressions in macro are not evaluated?
On Sep 13, 2011, at 2:39 AM, jingguo wrote: I get a_message printed twice if I paste the code in a clojure REPL. But I save the code into a file called foo.clj and use clj foo.clj to run it. I get nothing in stdout. It seems that (printf a_message \n) is not evaluated. Can anybody explain this behavior? Thanks. `for' yields a lazy sequence, whose elements are not actually evaluated until they are used. The REPL automatically prints the result of each expression you evaluate, which is the only thing that's causing those printfs to get evaluated. Try using `doseq' instead. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How to convert general recursion to loop .. recur syntax
Jeff: loop .. recur syntax is Clojure's preferred method of recursion. This is a routine to return the skeleton of a sequence, not its values. cmn -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: [ANN] Clojure 1.3 RC0
And the supporting ticket in JIRA http://dev.clojure.org/jira/browse/CLJ-31 On 09/14/2011 12:05 PM, Sean Corfield wrote: On Wed, Sep 14, 2011 at 8:45 AM, Paul Stadig p...@stadig.name wrote: This compiles fine in 1.2.1, but fails in 1.3.0-RC0 Intentional removal: https://github.com/clojure/clojure/blob/master/changes.txt 1.3 Disallow recur across try -- 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
^long vs (long arg)
What is the intended difference between type hinting like ^long and type coercing like (long arg)? For example my gut feeling for this case is to use ^long but it is forbidden: (loop [^long x 0] ...) Can't type hint a local with a primitive initializer So I use (loop [x (long 0)] ...) But not quite sure if it's right. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: [ANN] Clojure 1.3 RC0
Yeah it makes sense and is vaguely familiar now. I should have read the changelog. In our case we have a with-channel macro that expands into a try that I think could be moved up to a higher level and not be recuring across a try. Thanks, Paul -- 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: ^long vs (long arg)
I mean in Clojure 1.3 . -- 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 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: ^long vs (long arg)
The distinction is that you type hint function parameters to tell the compiler that this function parameter will always be of the specified type. You coerce something that may or may not be of a desired type, but is known to cleanly convert to that type. So: (defn add-two [^long x] (+ x 2)) ;= #'user/add-two (add-two (long 1.2)) ;= 3 On Wed, Sep 14, 2011 at 2:03 PM, Sergey Didenko sergey.dide...@gmail.com wrote: What is the intended difference between type hinting like ^long and type coercing like (long arg)? For example my gut feeling for this case is to use ^long but it is forbidden: (loop [^long x 0] ...) Can't type hint a local with a primitive initializer So I use (loop [x (long 0)] ...) But not quite sure if it's right. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: ^long vs (long arg)
On Wed, Sep 14, 2011 at 2:21 PM, Mark Rathwell mark.rathw...@gmail.com wrote: The distinction is that you type hint function parameters to tell the compiler that this function parameter will always be of the specified type. You coerce something that may or may not be of a desired type, but is known to cleanly convert to that type. So: (defn add-two [^long x] (+ x 2)) ;= #'user/add-two (add-two (long 1.2)) ;= 3 Should have noted that obviously calling 'add-two' with 1.2 would coerce to long, but the point is about what the code is saying (if it could talk). On Wed, Sep 14, 2011 at 2:03 PM, Sergey Didenko sergey.dide...@gmail.com wrote: What is the intended difference between type hinting like ^long and type coercing like (long arg)? For example my gut feeling for this case is to use ^long but it is forbidden: (loop [^long x 0] ...) Can't type hint a local with a primitive initializer So I use (loop [x (long 0)] ...) But not quite sure if it's right. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How to convert general recursion to loop .. recur syntax
Hi, Am 14.09.2011 um 16:54 schrieb octopusgrabbus: (defn skl [tree] (map skl (filter seq? tree))) Is that what you want? (defn skl [tree] (loop [output [] tree (seq tree)] (if tree (let [fst (first tree)] (if (seq? fst) (recur (conj output (skl fst)) (next tree)) (recur output (next tree output))) 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How to convert general recursion to loop .. recur syntax
You can prefer anything you want, but (a) to say that Clojure prefers loop/recur is nonsense, and (b) you can't make an incorrect algorithm work just by preferring it. Jeff is correct that your algorithm requires space for each level of the tree, and so cannot be converted into a constant-space algorithm. You can convert it into loop/recur by using up a bunch of heap instead of a bunch of stack, but there's rarely much point to doing that. On Sep 14, 9:38 am, octopusgrabbus octopusgrab...@gmail.com wrote: Jeff: loop .. recur syntax is Clojure's preferred method of recursion. This is a routine to return the skeleton of a sequence, not its values. cmn -- 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: Generating Bash scripts from Clojure
Hi, Thanks, I didn't knew this lib. I played with it a little bit, can't make the latest version (0.7) to work, only the 0.5. So far it seems pretty cool. I am not sure yet how to unit test the clojure bash scripts but the repl is much more confortable than the raw bash shell. And by the way the marginalia doc is awesome ! Denis On Tue, Sep 13, 2011 at 7:14 AM, Ambrose Bonnaire-Sergeant abonnaireserge...@gmail.com wrote: Hi, Check out Stevedore: https://github.com/pallet/stevedore Example: http://hugoduncan.org/post/2010/shell_scripting_in_clojure_with_pallet.xhtml User group: http://groups.google.com/group/pallet-clj Thanks, Ambrose On Tue, Sep 13, 2011 at 1:09 PM, Denis Labaye denis.lab...@gmail.comwrote: Hi, I have to write a bunch of Bash scripts, and not a lot of time :) The final script would perform a full install, provisionning, sanity checks, ... in one command. I wonder if I could generate them using Clojure. Of course the output script(s) won't have the Clojure runtime. Any advices / thoughts? Thanks, Denis -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Neighbors function from The Joy of Clojure
diagonals as neighbors. We don't think we take advantage of the flexibility anywhere in the book, so perhaps your version would indeed be better. It was used again only briefly in section 11.2 to define the legal moves that a king can make in chess, which of course includes diagonals. :-) -- 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: Thoughts on CUDA + Clojure
The Aparapi project was open sourced today take a look at http://aparapi.googlecode.com. Although previous comments had listed concerns with Aparapi code restrictions, it would be great to work with developers of languages like Clojure to see what features of Aparapi might be useful. Gary On Sep 9, 12:24 pm, Timothy Baldridge tbaldri...@gmail.com wrote: If it is not, then looking at Aparapi might be the better choice, and the AMD developers have openly stated that they would like to work with someone from the Clojure community on getting their openCL api working with Clojure. Sadly, Aparapi is very, very limited. Here is an example: http://developer.amd.com/zones/java/assets/README.html Sadly, Clojure code will probably never meet all those requirements. It may be possible to carefully craft code so that it will follow the requirements listed, but at that point you might as well just use a s-expression to opencl translator. Timothy -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
ClojureScript gets defrecord
Hi all, With sign-off from Rich, I have pushed my defrecord work onto master. Please try it out and let me know if you experience any issues. Cheers, Tom Hickey -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How to convert general recursion to loop .. recur syntax
Thanks. I'll have a look. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How to convert general recursion to loop .. recur syntax
Alan: I may have misunderstood what I've read both in books, blogs, and the Clojure site, but it seems that writing recursive functions in the loop .. recur style is the preferred style. I also remember most of the texts currently out on Clojure say use the higher level sequence functions rather than recursion. I get it. I wanted to do this particular exercise without the aid of Clojure.zip. -- 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: Mocking out namespaces
You could call the mock file B_mock.clj then (require '[B-mock :as B]) Jonathan On Wed, Sep 14, 2011 at 5:19 PM, Brian Hurt bhur...@gmail.com wrote: Say I have two name spaces, A and B, with A depending on B. I want to test namespace A, replacing module B with a mock B for testing purposes- preferably without having to load B at all (B sucks in a bunch of stuff, like dependencies on databases and external web sites and etc. that I don't want to deal with in testing). What is the easy, clojure-approved, mechanism for doing this? I tried: (ns B) ; mock defns (ns user) (require 'A) but this still load the real B, and A still calls the real B, and not the mock B. Thanks. Brian -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How to convert general recursion to loop .. recur syntax
2011/9/14 Meikel Brandmeyer m...@kotka.de Hi, Am 14.09.2011 um 16:54 schrieb octopusgrabbus: (defn skl [tree] (map skl (filter seq? tree))) Is that what you want? (defn skl [tree] (loop [output [] tree (seq tree)] (if tree (let [fst (first tree)] (if (seq? fst) (recur (conj output (skl fst)) (next tree)) (recur output (next tree output))) Hi Meikel, I haven't paid enough attention to be sure not to say nonsense, but by seeing in your code a recursive call to skl makes me think the code still can blow up the stack ? Sincerely, -- Laurent 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How to convert general recursion to loop .. recur syntax
Hi, 2011/9/14 Alan Malloy a...@malloys.org You can prefer anything you want, but (a) to say that Clojure prefers loop/recur is nonsense, and (b) you can't make an incorrect algorithm work just by preferring it. Jeff is correct that your algorithm requires space for each level of the tree, and so cannot be converted into a constant-space algorithm. You can convert it into loop/recur by using up a bunch of heap instead of a bunch of stack, but there's rarely much point to doing that. Well, not quite, since with the JVM it's faster to consume the stack and get a StackOverflowException, than it is to get an OutOfMemoryException, no ? It's certainly possible to convert this algorithm without consuming stack proportionnally to the depth of the tree. But as you said, in the end this would probably reimplement something along the lines of clojure.zip. Maybe more specialized, maybe faster ... On Sep 14, 9:38 am, octopusgrabbus octopusgrab...@gmail.com wrote: Jeff: loop .. recur syntax is Clojure's preferred method of recursion. This is a routine to return the skeleton of a sequence, not its values. cmn -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How to convert general recursion to loop .. recur syntax
On Wed, Sep 14, 2011 at 3:58 PM, octopusgrabbus octopusgrab...@gmail.com wrote: Alan: I may have misunderstood what I've read both in books, blogs, and the Clojure site, but it seems that writing recursive functions in the loop .. recur style is the preferred style. I also remember most of the texts currently out on Clojure say use the higher level sequence functions rather than recursion. I get it. I wanted to do this particular exercise without the aid of Clojure.zip. I would highly recommend using zip for such things, because otherwise you have to write code like this: (defn skl [tree] (loop [[self todo :as src] [tree], dst [()]] (cond (empty? src) dst (not (coll? self)) (recur todo (first dst)) (empty? self) (recur todo (conj (first dst) (rest dst))) :else (recur (list* (first self) (rest self) todo) [dst] Jonathan Claggett helped write that. I'm not sure there was ever a moment where we both understood it simultaneously. It essentially does what zippers do, but holds the data in a loop/recur frame rather than a data structure. Any further explanation is left as an exercise to the reader. --Chouser -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
[ANN] CfP for ACCU Conference April 24-28, 2012. Barcelo Oxford Hotel, Oxford, UK
Hi all, I'm sending this on behalf of Jon Jagger, the Conference Chair. It is a great conference. ACCU is a non-profit organisation run by software enthusiasts for software enthusiasts. ACCU warmly invites you to propose a session for this leading software development conference. Call for Proposals - ACCU 2012 April 24-28, 2012. Barcelo Oxford Hotel, Oxford, UK Submission website:https://www.conftool.pro/accu2012/ Submission deadline: 16th of October 2011 twitter: @accu2012 #accu2012 More details can be found here http://accu.org/index.php/conferences/accu_conference_2012/accu2012_Call_for_Papers The conference has always benefited from the strength of its programme. Please help us make 2012 another successful event. Jon Jagger Conference Chair -- Asprotunity Limited http://asprotunity.com Twitter: @gasproni Mobile: +44 (0) 791 746 0453 -- 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: Neighbors function from The Joy of Clojure
It certainly helped :)
I played around with it last night after chouser's response and it all made
sense, thanks!
Cheers,
Leonardo Borges
www.leonardoborges.com
On 15/09/2011, at 1:39 AM, Sean Corfield seancorfi...@gmail.com wrote:
On Wed, Sep 14, 2011 at 5:58 AM, Leonardo Borges
leonardoborges...@gmail.com wrote:
(defn neighbors
([size yx] (neighbors [[-1 0] [1 0] [0 -1] [0 1]] size yx))
([deltas size yx]
(filter (fn [new-yx]
(every? #( -1 % size) new-yx))
(map #(map + yx %) deltas
This syntax made me scratch my head since I believe it was the first
time I saw it.
In case it wasn't clear from Chouser's response, the key difference is
that this declares two versions of neighbors, one that takes three
arguments and one that takes four - essentially overloading on arity.
Here's an example from some of our code at World Singles:
(defn save-row
Given a table name (string), a record and an optional
key-gen function, either insert it after applying the
key-gen function (if no pk) or update it. In both
cases, return the pk. The default key-gen function
is a no-op (identity).
When operating on a MongoDB collection, the logic is
much simpler because the pk is always :_id and key
generation is always handled by MongoDB. Also, we
always return the entire updated record (since we
can run functions against the database).
([table record](save-row table record identity :id 0))
([table record key-gen](save-row table record key-gen :id 0))
([table record key-gen pk] (save-row table record key-gen pk 0))
([table record key-gen pk retry]
...))
Mostly we call this as (save-row :table-name {:some record}) but we
can also supply a key generation function (save-row :table-name {:some
record} add-uuid), for tables that don't have a generated PK column,
and we can specify the PK name if it isn't :id (save-row :table-row
{:some record} identity :email).
Ignore retry - we need to refactor that into a private helper function
:) It's part of the machinery that let's automatically retry
operations on MongoDB if the replica set has no active primary node
since it can take a while to failover...
Hope that helps?
--
Sean A Corfield -- (904) 302-SEAN
An Architect's View -- http://corfield.org/
World Singles, LLC. -- http://worldsingles.com/
Railo Technologies, Inc. -- http://www.getrailo.com/
Perfection is the enemy of the good.
-- Gustave Flaubert, French realist novelist (1821-1880)
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Re: Neighbors function from The Joy of Clojure
On Wed, Sep 14, 2011 at 3:35 PM, Fogus mefo...@gmail.com wrote: diagonals as neighbors. We don't think we take advantage of the flexibility anywhere in the book, so perhaps your version would indeed be better. I meant to say I didn't think. Sorry, didn't mean to put words in your mouth, Fogus. It was used again only briefly in section 11.2 to define the legal moves that a king can make in chess, which of course includes diagonals. :-) Ah, indeed. Sorry to mislead. --Chouser -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: [ANN] Clojure 1.3 RC0
On Wed, Sep 14, 2011 at 9:43 AM, Aaron Bedra aaron.be...@gmail.com wrote: And the supporting ticket in JIRA http://dev.clojure.org/jira/browse/CLJ-31 Nice. Now I understand better why this was disabled. -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Rounding the edges of an Emacs beginner
Far out - this is great stuff. Thanks guys. Wrt to moving down (or up) a block, vim-style, what I mean is the following (all functionality in 'Command Mode'). In Vim , you press *Ctrl-d* and *Ctrl-u* to go down and up a block respectively. Depending on the size of your window, it moves the cursor about 1/3rd of the way down (or up) the screen. This is very handy to have when just browsing a buffer. You can be more precise by pressing 37k, to move the cursor up 37 lines, etc. For whatever reason, I haven't been able to find something similar in Emacs. Tim On Wed, Sep 14, 2011 at 3:53 AM, Stefan Kamphausen ska2...@googlemail.comwrote: Hi, just a few follow-ups... On Wednesday, September 14, 2011 4:13:47 AM UTC+2, frye wrote: - ? howto list modes engaged Aside from the already mentioned C-h m (aka M-x describe-mode) you will want to use * C-h k (M-x describe-key) followed by some keybinding to find out what that keybinding does * C-h w (M-x where-is) followed by the name of some command to find out what keybinding exists for that command * C-h a PATTERN (M-x apropos) to search for PATTERN in command names and variables (ah, I miss hyper-apropos from XEmacs) * C-h v VARIABLE (M-x describe-variable) to see the documentation for a variable in ELisp (use C-c C-d d on Clojure symbols to see their documentation from SLIME) * C-h f FUNCTION (M-x describe-function) to see docs for an Elisp-function * and finally C-h ? to find out what other help is available The built-in help system of Emacs is one of its greatest strengths. - ? Can you use Emacs / Slime / CDT (debugging) with Ruby / Rails ? howto do Code completion (clojure, and elisp ) Try TAB in the REPL and M-TAB in a Clojure-buffer when you are connected to a running image. As a VIM'er, I'm trying to do the following using emacs navigation, but seem to have missed the levers to pull. I'm using a vim navigation pluginhttp://gitorious.org/evil/pages/Home, which helps a lot. - ? set line numbers I use linum.el written by Markus Triska: (when (try-require 'linum) ;; try require is just a minor wrapper which checks, whether a lib is available (global-linum-mode)) - ? go to line 'n' Since my fingers are used to M-g I bind that key to goto-line : (global-set-key (kbd M-g) #'goto-line) - ? how to jump to matching parentheses Meta with left and right cursor keys. Actually those are forward-sexp and backward-sexp - ? move down a chunk like in vim What does that mean? - ? yank 'n' lines - emacs yank puts back some 'killed' text ; HOWTO copy Mark things by first enabling the mark with C-SPC. Move around using your usual command. Copy to the kill-ring with M-w or cut the text and copy it to the kill-ring using C-w. After that you can yank (Emacsspeak for 'paste') from the kill ring with C-y. Try M-y right after a C-y to get older elements on the kill-ring. For marking, try what C-M-SPC does, also hit it several times in a row. Warning: if your finger's memory learns this, using modern IDEs may feel awkward. Regards, Stefan -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Rounding the edges of an Emacs beginner
Hey Benjamin, Thanks for the tips !! Have no fears about my passion for vim :) I'm actually using vimclojure now, and it has fabulous command completions for clojure functions, which I love. I did get the nailgun server setup, and connected. But 1) there's a lot of gymnastics involved in getting it running (although it is quite nice, once your setup is going). The one thing that I crave is that debugging integration. It's actually a limitation of vim, not nailgun - either vim's lack of threads, or it's communication channel does not allow for these kinds of symbols to go both ways (you can just send from ng-client). But I still used, and will continue to use vim for most tasks (I much prefer it's navigation to emacs'). The first main carrot pulling me to try emacs now is 'evil' http://gitorious.org/evil/pages/Home, emac's newest vim plugin. The wrinkles are fast being ironed out, and it does the basic navigation and editing that I expect from a vim. I'm actually eager to see how much .vimrc settings I can get into 'evil'. So the other emacs carrot for me, is that swank / slime debugging integration. It looks quite handy, and I'm keen on tools that can get me closer to the code, reducing my time to develop. Cheers Tim On Wed, Sep 14, 2011 at 7:44 AM, Benjamin Klüglein scheibenk...@googlemail.com wrote: Hi Tim, back when I started diving into Clojure I had the very same plan, teach me Emacs to write Clojure. Somewhere down the road I realized that I can have almost everything, that I hoped to gain by picking up Emacs, in VIM too. VimClojure and lein-vimclojure**, once set up, delivered everything I was looking for. Ok, everything but debugging! Which, thanks to the ability to use tracing right inside a vim repl, I don't miss that much as I missed my buddies . and * back then... :-) I definitely don't want to discourage you from looking into Emacs, which without a question is a great text editor, I just wanted to note that there are working setups for VIM too. :-) Regards, Ben Am 14.09.2011 04:13, schrieb Timothy Washington: Hey all, So I'm still an avid vim user. But I see a lot of power in the swank slime setup, and have been teaching myself emacs to try to leverage it. There are still a few tricks I haven't got. Maybe my notes are just disorganised, but I was hoping fellow Clojurians can chime in. - ? getting an error when I i) M-x slime-connect or ii) send a form (+1 1) to swank ; this is after i) a lein swank then ii) in another window emacs M-x connect . ** Evaluating Slime forms seems to work after that webkell@ubuntu:~/Projects/bkell$ lein swank Listening for transport dt_socket at address: 36109 Connection opened on localhost port 4005. exception in read loop java.lang.Exception: Error reading swank message *# this happens when slime tries to connect with M-x slime-connect * at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ... at java.lang.reflect.Constructor.newInstance(Constructor.java:513) ... at clojure.lang.Var.applyTo(Var.java:518) at clojure.main.main(main.java:37) exception in control loop java.lang.InterruptedException at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.reportInterruptAfterWait(AbstractQueuedSynchronizer.java:1961) ... at swank.util.concurrent.mbox$receive.invoke(mbox.clj:28) at swank.core$control_loop.invoke(core.clj:401) ... at swank.swank$connection_serve$fn__1720.doInvoke(swank.clj:20) ... at java.lang.Thread.run(Thread.java:619) - ? howto do Code completion (clojure, and elisp ) - ? close a slime-repl connection - ? howto list modes engaged - ? Also need to increase my skills navigating the debugger. Is this still the reference http://georgejahad.com/clojure/swank-cdt.html to use - ? Can you use Emacs / Slime / CDT (debugging) with Ruby / Rails As a VIM'er, I'm trying to do the following using emacs navigation, but seem to have missed the levers to pull. I'm using a vim navigation pluginhttp://gitorious.org/evil/pages/Home, which helps a lot. - ? set line numbers - ? go to line 'n' - ? how to jump to matching parentheses - ? move down a chunk like in vim - ? yank 'n' lines - emacs yank puts back some 'killed' text ; HOWTO copy Thanks Tim -- 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
Re: Mocking out namespaces
You can't easily prevent the loading of B unless it's in a separate directory that isn't part of your classpath during testing. You could define B-mock to load B and then redefine all the symbols. -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
Re: Rounding the edges of an Emacs beginner
In emacs you can give a number to preface many commands, e.g. C-37 C-n will perform next line 37 times, and C-37 C-p will perform previous line 37 times. You can setup keybindings for these as well, but I find the basic navigation commands like C-v/M-v (up/down a page) and C-l (center current line in the buffer) to be sufficient. -Original Message- From: Timothy Washington twash...@gmail.com Sender: clojure@googlegroups.com Date: Wed, 14 Sep 2011 20:08:28 To: clojure@googlegroups.com Reply-To: clojure@googlegroups.com Subject: Re: Rounding the edges of an Emacs beginner Far out - this is great stuff. Thanks guys. Wrt to moving down (or up) a block, vim-style, what I mean is the following (all functionality in 'Command Mode'). In Vim , you press *Ctrl-d* and *Ctrl-u* to go down and up a block respectively. Depending on the size of your window, it moves the cursor about 1/3rd of the way down (or up) the screen. This is very handy to have when just browsing a buffer. You can be more precise by pressing 37k, to move the cursor up 37 lines, etc. For whatever reason, I haven't been able to find something similar in Emacs. Tim On Wed, Sep 14, 2011 at 3:53 AM, Stefan Kamphausen ska2...@googlemail.comwrote: Hi, just a few follow-ups... On Wednesday, September 14, 2011 4:13:47 AM UTC+2, frye wrote: - ? howto list modes engaged Aside from the already mentioned C-h m (aka M-x describe-mode) you will want to use * C-h k (M-x describe-key) followed by some keybinding to find out what that keybinding does * C-h w (M-x where-is) followed by the name of some command to find out what keybinding exists for that command * C-h a PATTERN (M-x apropos) to search for PATTERN in command names and variables (ah, I miss hyper-apropos from XEmacs) * C-h v VARIABLE (M-x describe-variable) to see the documentation for a variable in ELisp (use C-c C-d d on Clojure symbols to see their documentation from SLIME) * C-h f FUNCTION (M-x describe-function) to see docs for an Elisp-function * and finally C-h ? to find out what other help is available The built-in help system of Emacs is one of its greatest strengths. - ? Can you use Emacs / Slime / CDT (debugging) with Ruby / Rails ? howto do Code completion (clojure, and elisp ) Try TAB in the REPL and M-TAB in a Clojure-buffer when you are connected to a running image. As a VIM'er, I'm trying to do the following using emacs navigation, but seem to have missed the levers to pull. I'm using a vim navigation pluginhttp://gitorious.org/evil/pages/Home, which helps a lot. - ? set line numbers I use linum.el written by Markus Triska: (when (try-require 'linum) ;; try require is just a minor wrapper which checks, whether a lib is available (global-linum-mode)) - ? go to line 'n' Since my fingers are used to M-g I bind that key to goto-line : (global-set-key (kbd M-g) #'goto-line) - ? how to jump to matching parentheses Meta with left and right cursor keys. Actually those are forward-sexp and backward-sexp - ? move down a chunk like in vim What does that mean? - ? yank 'n' lines - emacs yank puts back some 'killed' text ; HOWTO copy Mark things by first enabling the mark with C-SPC. Move around using your usual command. Copy to the kill-ring with M-w or cut the text and copy it to the kill-ring using C-w. After that you can yank (Emacsspeak for 'paste') from the kill ring with C-y. Try M-y right after a C-y to get older elements on the kill-ring. For marking, try what C-M-SPC does, also hit it several times in a row. Warning: if your finger's memory learns this, using modern IDEs may feel awkward. Regards, Stefan -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Generating Bash scripts from Clojure
On Wed, 14 Sep 2011 15:34:25 -0400, Denis Labaye denis.lab...@gmail.com wrote: I played with it a little bit, can't make the latest version (0.7) to work, only the 0.5. The current version will require you use (with-script-language :pallet.stevedore.bash/bash …) to specify bash as the target language So far it seems pretty cool. I am not sure yet how to unit test the clojure bash scripts but the repl is much more confortable than the raw bash shell. The stevedore tests might provide inspiration. And by the way the marginalia doc is awesome ! Thanks. There is also: http://pallet.github.com/pallet/reference/reference_script.html (which needs updating and moving to go with the rest of the stevedore docs) -- Hugo Duncan -- 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
confusion with map and dosync
I'm sure this is very straightforward but can someone enlighten me why queue copy fetch is seemingly never called from within process-indexes (the 'pre add' line is printed but the 'adding' debug line is never printed). I've verified the correct contents of fetches-seq. For a bonus point can I ask if need the dosync inside q-c-f if its only ever called from p-i ? Any comments on style appreciated too. (defn- queue-copy-fetch [cfetch] (println adding cfetch) (dosync (alter copy-fetch-queue conj cfetch))) (defn process-indexes [] (while (seq @index-process-queue) (let [an-index (qpop index-process-queue) index-source (:source (:fetch an-index)) index-content (:doc-seq an-index) links-seq ((:copy-link-selector index-source) index-content) fetches-seq (map (partial fetch index-source) links-seq)] (println pre add) (dosync (map queue-copy-fetch fetches-seq) -- 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: heaps in clojure
Hi chouser, Thanks for your response. but correct me if I am wrong.. wouldn't sorted-set completely sort the complete collection without actually taking into account that only the first few elements are needed? Thanks, Sunil. On Tue, Sep 13, 2011 at 7:15 PM, Chouser chou...@gmail.com wrote: On Tue, Sep 13, 2011 at 7:44 AM, Sunil S Nandihalli sunil.nandiha...@gmail.com wrote: Hi Everybody, I have a very large, but with finite size, collection. I would like to get like first 10 elements in the sorted list . I would use a heap if I were in c++ .. is there a inbuilt implementation of this in clojure? .. Is there some other way to achieve this? some sort of lazy sort would be perfect. I know I need the full collection to start with .. but that is fine. A seq on a sorted set should be pretty efficient. (take 3 (sorted-set 8 2 1 4 6 9 7 3)) ;= (1 2 3) --Chouser -- 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
