Re: The Number of Clojure (Was: Alright, fess up, who's unhappy with clojurescript?)
And I should have posted about the spec separately, right? ;; or all I have to do is to forbid myself to post anything... -- Name: OGINO Masanori (荻野 雅紀) E-mail: masanori.og...@gmail.com -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: [ANN] emacs-clojure-vagrant: a sane development virtual environment
Update: I just got back from vacation and have done a fresh git clone, et all (including updating VB to 4.1.0). I still get the same issue: No error, but a hang at Installed Jark (I say hang because the terminal shell is stuck running the vagrant script where I would assume it would have returned once the VM was successfully running). I opened a new terminal window and ran the clojure_emacs.sh script manually. Unlike last time, this seems to have worked but requied a logout and back in to get jark running and emacs to connect. From there things seems ok. However, vagrant halt didn't do anything (but hang the shell) and I was forced to shutdown manually from inside the vm (sudo shutdown now). I did a vagrant up again and it is setting up a brand new VM for me. Not sure what it did with the old VM or why it insists on creating a new one. If this run doesn't work then I will send all the output to a file and send that to you so you can see if anything seems amiss. Thanx, joe P.S. The current git repo requires at least VB 4.1.0, but the actual image it downloads throws a warning up about the VB Extensions not matching. The VM still has 4.0.6 extensions installed on it. On Sat, Jul 9, 2011 at 10:16 AM, Stan Dyck stan.d...@gmail.com wrote: Another thing to try is this: 1. Bring up the vm with a vagrant up 2. Log in with vagrant ssh 3. Run the /vagrant/clojure_emacs.sh script directly on the vm That might not work either, but at least you'll get some feedback about what fails from the script output. I'm curious about why it's failing so let me know if you find out. StanD. On 07/08/2011 10:47 PM, Joseph Jones wrote: Still no love. Same thing, only this time there wasn't even an empty .emacs.d folder. On Fri, Jul 8, 2011 at 10:51 AM, Joseph Jones darkdescend...@gmail.commailto: darkdescendant@gmail.**com darkdescend...@gmail.com wrote: When I tried bringing it down and back up, it restarted the whole process over from scratch. Basically, vagrant halt seems to cause the entire VM to disappear as if vagrant destroy was called. :-( I'll try to re-get from git and see if it works better now. On Fri, Jul 8, 2011 at 9:30 AM, Stan Dyck stan.d...@gmail.commailto: stan.d...@gmail.com wrote: There was a minor bug in the provisioning script that prevented the .emacs.d directory from being populated but a fix has been pushed for that. That being said, I also had the hang issue. I did the same as you; I did a vagrant ssh from a new terminal window and everything worked. Also, after bringing down the virtual server and bringing it up again, the problem has not recurred. I haven't had the time to figure out why it hung in the first place though. StanD. On 07/08/2011 08:37 AM, Joseph Jones wrote: I'm having a problem on Max OS X 10.6.8 where vagrant hangs setting up the VM right after installing jark. It seems to just stop doing anything. I initially thought that that meant it was completed but opening a new terminal window and doing vagrant ssh brought me to a VM that had nothing setup. No Jark running (in fact no Jark on the path), no swank, and emacs knew nothing about slime in any way. I checked out the .emacs.d folder and there was nothing in it so obviously whatever step was supposed to put something there never ran. Any ideas on what the issue could be? Thanx, joe On Sun, Jun 26, 2011 at 9:50 PM, Justin Lilly jus...@justinlilly.com mailto:jus...@justinlilly.com** mailto:jus...@justinlilly.com mailto:jus...@justinlilly.com* *__ wrote: I've put together a simple development environment for those looking for a stable place to work on clojure code. The idea was dual purpose: a consistent environment for which to try out multiple code bases and something that is familiar to me when working on a foreign operating system. The included vagrant file will setup an Ubuntu 11.04 virtual machine with clojure and clojure-contrib 1.2, emacs 24 (with emacs-starter-kit 2 and all relevant clojure modes), tmux (similar to GNU screen), Leiningen and Jark. Special thanks to Phil Hagelberg for his help getting things setup. Please check out the github project hosted by the Seajure user group at https://github.com/Seajure/__**emacs-clojure-vagranthttps://github.com/Seajure/__emacs-clojure-vagrant https://github.com/Seajure/**emacs-clojure-vagranthttps://github.com/Seajure/emacs-clojure-vagrant . Your forks and contributions are appreciated. Thanks, -justin -- You
Re: The Number of Clojure (Was: Alright, fess up, who's unhappy with clojurescript?)
On Tue, 26 Jul 2011 21:30:25 -0700 (PDT) pmbauer paul.michael.ba...@gmail.com wrote: These unhappy threads need to die a horrible death. Well, criticism can also be constructive. It does at least show some of the problems and/or desires that the community has. Fortunately, noone is forced to read them :) regards, Marek -- 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
send from agent error handler does not work
I tested the following on clojure 1.2 and clojure 1.2.1 and it does not seem to work. (def foo (agent nil)) (def bar (agent nil :error-handler (fn [a e] (do (def called? true) (send foo (constantly e) (def called? false) (send bar inc) ; try incrementing nil (await error); wait for agent to finish [@foo called?] ; check value = [nil true] The last expression should evaluate to: [true #NullPointerException java.lang.NullPointerException]. Instead, it's evaluating to '[nil true]', which indicates that the 'error-handler' is indeed being called but 'send' isn't working. It works as expected on clojure 1.3.0-beta1 though. Seems like this issue was reported last year and has resurfaced. Link to previous discussion about the bug: http://groups.google.com/group/clojure/browse_thread/thread/c1d05bdbb50d7d28/4d1a64405e8fb766?lnk=gstq=send+from+agent+error+handler#4d1a64405e8fb766 -- Abhijith -- 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 take-while
On 27 July 2011 00:03, axyzxp axy...@gmail.com wrote: Hi, experimenting with clojure API i had this: user= (take-while #(= (mod 20 %) 0) (apply (fn [x y] (rest (range (max x y [10 20])) (1 2) but i expect to have (1 2 5 10) because of (apply (fn [x y] (rest (range (max x y [10 20]) returns (1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19) and (mod 20 5) and (mod 20 10) should give me true and not should be dropped... I'm sure i'm doing some big nasty errors but don't know where... In addition to the other answers, you can use: (range 1 20) instead of: (rest (range 20)) and zero? instead of (= x 0). e.g.: (filter #(zero? (mod 20 %)) (range 1 (apply max [10 20]))) -- Michael Wood esiot...@gmail.com -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Invitation for Open Source Project
right sir -- 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] cljs-devmode - A development mode for ClojureScript
Hello everyone, I like to introduce you to cljs-devmode, which is a development mode for ClojureScript. It is really a primitive prototype for a ClojureScript development mode, but it works for me so far. I only wrote it to get started with ClojureScript in one of my Clojure web applications. cljs-devmode allows you to develop Clojure web applications in combination with ClojureScript seamlessly. You can develop your normal Clojure web application (with Ring and Compojure for example) and whenever you change a ClojureScript source file it is automatically recompiled and you can test the changes in your web browser. You can find cljs-devmode and a detailed description here: https://github.com/maxweber/cljs-devmode Furthermore there is an example project, which shows how to use cljs-devmode: https://github.com/maxweber/cljs-devmode-example There are many things which can be improved. So fork it on GitHub if you are not satisfied with it. I hope it will serve you well, when you develop ClojureScript inside your Clojure web application. Best regards Max -- 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: cljs-devmode - A development mode for ClojureScript
Thanks Max. This is wonderful. I can throw my current hack-job out the window. -Alen PS. Should I encounter any issues, I'll post them via github. On Jul 27, 12:31 pm, Max Weber mm.we...@web.de wrote: Hello everyone, I like to introduce you to cljs-devmode, which is a development mode for ClojureScript. It is really a primitive prototype for a ClojureScript development mode, but it works for me so far. I only wrote it to get started with ClojureScript in one of my Clojure web applications. cljs-devmode allows you to develop Clojure web applications in combination with ClojureScript seamlessly. You can develop your normal Clojure web application (with Ring and Compojure for example) and whenever you change a ClojureScript source file it is automatically recompiled and you can test the changes in your web browser. You can find cljs-devmode and a detailed description here:https://github.com/maxweber/cljs-devmode Furthermore there is an example project, which shows how to use cljs-devmode:https://github.com/maxweber/cljs-devmode-example There are many things which can be improved. So fork it on GitHub if you are not satisfied with it. I hope it will serve you well, when you develop ClojureScript inside your Clojure web application. Best regards Max -- 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
Emacs, swank, leiningen repl-init and output to *out* getting lost...
If that subject did not scare you off already you might be the right
person to comment.
To set the scene, I'm writing an application with an embedded web
server (using ring and jetty), and my srv.core module has a log
function defined as:
(let [repl-out *out*]
(defn log [msg vals]
(binding [*out* repl-out]
(let [line (apply format msg vals)]
(println line)
The reason I'm storing *out* in repl-out is that I also want to
capture output from all threads (including jetty's) and have it
displayed in my repl (and probably elsewhere in the future). Without
this kind of construction, output seems to get lost inside the emacs
repl, possibly related to Java's behaviour of redirecting output in
threads to /dev/null or similar.
This seemed to work fine, until I decided to get fancy. Leiningen
allows you to load up a repl specific namespace through it's repl-
init setting, and I figured this may be a nice place to create a
function to manually start up the jetty web server by calling one of
my functions inside the srv.core module.
My method in srv.core is nothing fancy, just:
(defn srvstart []
(log Server started)
(alter-var-root (var server)
(fn [v]
(run-jetty (app) {:port 8080 :join? false}
In my repl.helper module, I first tried:
(ns repl.helper
(:use clojure.repl
srv.core))
(defn replsrv []
(srv.core/srvstart))
Worked fine, except my log output got lost. If I ran it in a terminal
based console lein repl style, the log output appeared, but if I ran
it inside emacs clojure-jack-in style, it did not.
I haven't figured out exactly why (yet anyway). It seems the *out*
value that got stored in repl-out when the module was pulled in by the
use srv.core statement in repl.helper stores a different value than
the final value *out* has when the repl is up and running, at least
inside the emacs repl.
I figured I would try to delay pulling in srv.core until it was
actually needed, and that seems to solve it, ending up with the
following code in repl.helper:
(ns repl.helper
(:use clojure.repl))
(defn replsrv []
(require 'srv.core)
(@(resolve 'srv.core/srvstart)))
I have only vague theories about *out* getting set to something
unusable if pulled in during the first reading phase. Whether that is
correct behaviour or not, or if this is just a feature of how the
repl works inside emacs, I have no clue about.
If somebody with a clue would like to comment, please do.
Thanks,
Marius K.
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Minimalist autocompile workflow for ClojureScript
Just sharing the stopgap method for static HTML (no server)
ClojureScript development I'm using until someone cooks up a REPL that
evals in the browser instead of Rhino.
Nothing particularly exciting here, but really beats restarting the JVM
on every compile. :-)
This will only work on Linux as is but could be trivially adapted to any
OS that has an equivalent to inotifywait. (JDK 7 will have an API for it.)
1. Install your distro's inotify-tools package.
2. Adjust the paths in the code below to suit your project.
3. Run ClojureScript's ./script/repl and paste in the code below.
4. Point your favourite editor and web browser at your project.
Now use a workflow something like this:
1. In the editor make a code change and save it.
2. Flip to browser and refresh to test it.
3. Repeat until done.
Here's the code:
(require '[cljs.closure :as cljsc])
(defn await-change [path]
(- (Runtime/getRuntime)
(.exec (into-array [inotifywait -qre modify path]))
(.waitFor)))
(let [root /home/ato/src/myproject]
(while true
(println Compiling...)
(time
(cljsc/build
(str root /src/myproject/core.cljs)
{:optimizations nil ; vs :simple or :advanced
:target nil ; vs :nodejs
:pretty-print true
:output-dir (str root /out)
:output-to (str root /myproject.js)}))
(await-change (str root /src
Hints:
1. Avoid optimizations :simple or :advanced when you can while
developing. On my PC after the JVM warms up a basic compile takes 30ms
while :simple or :advanced take at least 1 second.
2. If there's a compile error you might not notice it. Position your
terminal somewhere you can easily see from both editor and browser.
3. I highly recommend global hot-keying your browser, editor and
terminal somehow. You could use virtual desktops. Me, I use the same
three tools for all my work so I just have Super-w, Super-e and Super-d
focus each respectively.
4. The same method works well for any compiled language that lacks an
interactive dev environment. When I'm working on C code I just run
this in a terminal:
while inotifywait -qre modify src; make ./myprogram; done
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How to write `when-lets`
Clojure core.clj has a macro when-let, I am wondering how to write a macro `when-lets` (when-lets [symbol-1 test-1 symbol-2 test-2 ... ] body ) body only get evaluated when (and test-1 test-2 ) I am thinking about it, anybody has any clue? -- 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
cake create project / setup instructions
Before getting too far along, I'd like to set up my project the way I've seen other projects' configurations, like clj-http and clojure- csv. I can build my project, but it is not set up in the standard way. I am using cake, but cannot find instructions on configuring and then creating the project from scratch. tnx 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
I made you something.
http://groups.google.com/group/clojure-meta Big hugs to you all, from a tired old man. -steven -- 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
Code structure/design problems
Hi! I'm making a game with Clojure. And I have a few code structure/design problems. I have an atom with characters (a map of maps) in my main file. But because I don't want to make that file too big I have, for example, a file called ai.clj with AI stuff, that I require from the main file. For the monsters' AI to work, the AI needs to know the state of the world, i.e. the characters. My current solution is to (declare characters) and then have a (defn init-ai [characters] (def characters characters)) function in ai.clj that I call from the main file at the start of the game. It works, but it doesn't feel quite right. I don't want to have to pass the characters as an argument all the time, that seems a little bit too verbose to me. It seems somehow unnecessary to have to just pass the same atom around to all the functions. That's a general theme in my project: modules/files depend on the main module/file. And sometimes there's nothing I can do about it. The graphics engine I'm using, for example, insists that my application extends an Application class from the engine. And that the main loop is in that app. So that's in my main file. But I really want the graphics module to be a separate thing to which I send things to be represented graphically. But, of course, the graphics module depends on the app instance in my main file. So I did for the graphics what I did for the AI. Another concern of mine is that there are so many places where I need to update the characters' state. There's the AI stuff, that updates the monsters with their targets and paths, etc. Other examples: when one character attacks another, then the health needs updating; or when the player moves. I have a doubts that I am doing this the Clojure way. Often, the characters' ids are arguments to functions. For example, I have a function called physical-attack (the one I mentioned above) that takes the id of the attacker and the id of the target. Then it calculates how much damage the attack is supposed to do, and updates the target's health in the 'characters' atom. Sure, it could return the amount of damage instead, that would be one step towards purity. But to be really pure it would have to take the actual maps as arguments too. It may work in this case, but it's not always so easy to make the functions pure. The function that calls physical-attack, for example, also updates the attacker (he now has to wait before he can attack again), and returning both of the updated characters is not as nice as returning one. And the update still has to happen somewhere, because attacking *has* a side effect (in the game), so maybe it's ok. It's just that now the updates are spread out all over, and I thought that maybe it was better to have them in a special place in the code, for sturcture and sanity. A concrete problem: I want a function that takes the ids of two characters (because as I explained above that's more convenient) and checks if they are close enough to each other to attack. But I want to use the function in the ai file and in the main file. But I can't define it in some sort of utility file, because it depends on the characters atom. And it doesn't feel quite right to define it in ai.clj since 'characters' is defined in the main file, but the main file requires ai and not the other way around. I could also define the function in the main file and send it to the ai file as I did with 'characters' itself, but that seems really messy. Sure, this function could be functional, and that would solve these problems. But that would be inconvenient, because I would just have to look up the position of the characters in a lot more places instead, leading to increased code size. I just wanted to write down my problems and maybe get some comments on it. This being my first real Clojure project, I feel that I could use some guidance, so feel free to comment as much as you'd like. I realize that these are problems programmers deal with all the time (at least I think so), but I thought that maybe the Clojure community, being so wise, might have some answers. ;) -- 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 url path confusion
I've set up my ring/jetty based application to dynamically compile any
updated clojurescript source files, similar to the clojurescript
devenv package recently announced. I'm having some trouble getting the
paths correct though. My toplevel directory looks like this:
mysoft
srv
src
srv
core.clj (implements namespace srv.core)
client
hello.cljs
www
index.html
What I'm trying to do is gettng the server, implemented in core.clj to
dynamically compile any updates to any cljs files in the client
directory, and output compiled sources to the www directory. I've
almost gotten it working; After compiling, the www directory gets
populated with hello.js and an out directory with the proper
subfolders.
What is not correct, however, is the url's in the generated files.
When compiling, I use the following code:
(cljsc/build ../client
{:output-dir ../www/out
:output-to ../www/hello.js})))
As I've mentioned, the correct files and directories seem to get put
into the www directory correctly. What is not correct however is the
content of the file hello.js:
goog.addDependency(../../../srv/../www/out/cljs/core.js,
['cljs.core'], ['goog.string', 'goog.string.StringBuffer',
'goog.object', 'goog.array']);
goog.addDependency(../../../srv/../www/out/hello.js, ['hello'],
['cljs.core']);
It seems my local file paths pollutes the url paths incorrectly. In
case it wasn't clear, the www is the root of the embedded webserver
in my application.
Am I doing something wrong, or should there really be some kind of
uriBase parameter also sent to the build function to avoid the local
filepaths polluting the url tree?
Thanks,
Marius K.
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Re: How to write `when-lets`
This would be a straightforward solution: (defmacro when-lets [bindings body] `(let ~bindings (when (and ~@(map first (partition 2 2 bindings))) ~@body))) It works well in simple cases, but breaks e.g. in case of parameter destructuring. If you read `(source when-let)`, you'll see that it uses a temporary binding. So we can add that and a loop, or just reuse `when-let` and use something akin to recursion: (defmacro when-lets [bindings body] (if (empty? bindings) `(do ~@body) `(when-let [~@(take 2 bindings)] (when-lets [~@(drop 2 bindings)] ~@body user= (when-lets [a 1 [b c] [1 2]] (+ a b c)) 4 user= (when-lets [a 1 [b c] nil] (+ a b c)) nil Questions? On Jul 27, 4:50 pm, Feng Shen shen...@gmail.com wrote: Clojure core.clj has a macro when-let, I am wondering how to write a macro `when-lets` (when-lets [symbol-1 test-1 symbol-2 test-2 ... ] body ) body only get evaluated when (and test-1 test-2 ) I am thinking about it, anybody has any clue? -- 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: Code structure/design problems
Hi Oskar, I just came across this article yesterday, which I thought you may find useful. It's a 4-part series where the author discusses his experience implementing games in a functional style: http://prog21.dadgum.com/23.html He was using Erlang, but I think many of the same ideas apply here as well. Hope this helps. -- 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 write `when-lets`
On Wed, Jul 27, 2011 at 10:51 AM, Dmitry Gutov raa...@gmail.com wrote: This would be a straightforward solution: (defmacro when-lets [bindings body] `(let ~bindings (when (and ~@(map first (partition 2 2 bindings))) ~@body))) It works well in simple cases, but breaks e.g. in case of parameter destructuring. If you read `(source when-let)`, you'll see that it uses a temporary binding. So we can add that and a loop, or just reuse `when-let` and use something akin to recursion: (defmacro when-lets [bindings body] (if (empty? bindings) `(do ~@body) `(when-let [~@(take 2 bindings)] (when-lets [~@(drop 2 bindings)] ~@body user= (when-lets [a 1 [b c] [1 2]] (+ a b c)) 4 user= (when-lets [a 1 [b c] nil] (+ a b c)) nil Questions? I'd go with the latter approach. The former has the problem that we'd really like this: (when-lets [wr (:key some-map-of-weak-references) v (.get wr)] (do-something-with v)) not to blow up when :key isn't found in the map. -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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: Code structure/design problems
On Wed, Jul 27, 2011 at 10:04 AM, Oskar oskar.kv...@gmail.com wrote:
I have an atom with characters (a map of maps) in my main file. But
because I don't want to make that file too big I have, for example, a
file called ai.clj with AI stuff, that I require from the main file.
For the monsters' AI to work, the AI needs to know the state of the
world, i.e. the characters. My current solution is to (declare
characters) and then have a
(defn init-ai [characters] (def characters characters))
function in ai.clj that I call from the main file at the start of the
game. It works, but it doesn't feel quite right.
(ns namespace-1 ...)
(def chs (promise))
(defn characters [] (@chs))
...
(ns namespace-2
(:require namespace-1 :as n1)
...)
(defn patrol [...] ...)
(defn predatory-wildlife [...] ...)
(deliver n1/chs
{
...
{:desc Dire Wolf :level 7 :race :canine :ai predatory-wildlife ...}
{:desc Dwarven Guard :level 18 :race :dwarf :ai patrol ...}
...})
You'll need to use (characters) or @chs rather than just characters in
namespace-1, though.
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Re: How to write `when-lets`
I tried to solve this, and, having very litte macro-writing experience, just looked at when-let and tried to modify it to work with multiple binds. This is what I ended up with: (defmacro when-lets [bindings body] (if-not (seq bindings) `(do ~@body) (let [form (bindings 0) tst (bindings 1) rst (drop 2 bindings)] `(let [temp# ~tst] (when temp# (let [~form temp#] (when-lets ~(vec rst) ~@body))) Not as elegant as Dmitry's code, I know... But before I landed on the above version, I had this: (defmacro when-lets [bindings body] (if-not (seq bindings) `(do ~@body) (let [form (bindings 0) tst (bindings 1) rst (drop 2 bindings)] `(let [temp# ~tst] (when temp# (when-lets ~(vec rst) (let [~form temp#] ~@body))) Notice that the when-lets and let close to the end there has swapped places. This is wrong, because the tests/values get evaluated in the wrong order. But apart from that I expected this to work. But it does not. This last code yields this: = (when-lets [a 1 b 2] [a b]) [2 2] Two questions: First: Why doesn't macroexpand expand the inner when-lets? = (macroexpand '(when-lets [a 1 b 2] [a b])) (let* [temp__1551__auto__ 1] (clojure.core/when temp__1551__auto__ (user/when-lets [b 2] (clojure.core/let [a temp__1551__auto__] [a b] Second: If I extract the inner when-lets manually and expand that, and reinsert it, I end up with this: (let* [temp__1551__auto__ 1] (clojure.core/when temp__1551__auto__ (let* [temp__1551__auto__ 2] (clojure.core/when temp__1551__auto__ (user/when-lets [] (clojure.core/let [b temp__1551__auto__] (clojure.core/let [a temp__1551__auto__] [a b]))) I thought that the name of the gensyms might just be the same for a and b because I did two expands in the repl or something. But it seems to me that them getting the same name is the only explaination for the result above (maybe they are the same, somehow?). Is the gensym in the two expands the same thing, or do they get the same name? That was surprising to me. I can't think of any real example where that is a problem. But what if I had wanted to write a macro like the second when-lets? On Jul 27, 4:51 pm, Dmitry Gutov raa...@gmail.com wrote: This would be a straightforward solution: (defmacro when-lets [bindings body] `(let ~bindings (when (and ~@(map first (partition 2 2 bindings))) ~@body))) It works well in simple cases, but breaks e.g. in case of parameter destructuring. If you read `(source when-let)`, you'll see that it uses a temporary binding. So we can add that and a loop, or just reuse `when-let` and use something akin to recursion: (defmacro when-lets [bindings body] (if (empty? bindings) `(do ~@body) `(when-let [~@(take 2 bindings)] (when-lets [~@(drop 2 bindings)] ~@body user= (when-lets [a 1 [b c] [1 2]] (+ a b c)) 4 user= (when-lets [a 1 [b c] nil] (+ a b c)) nil Questions? On Jul 27, 4:50 pm, Feng Shen shen...@gmail.com wrote: Clojure core.clj has a macro when-let, I am wondering how to write a macro `when-lets` (when-lets [symbol-1 test-1 symbol-2 test-2 ... ] body ) body only get evaluated when (and test-1 test-2 ) I am thinking about it, anybody has any clue? -- 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 - why is javascript object array and not a map?
Note the following code that works: (defn ^:export displayPlain [id] (let [h (.getElementById window/document id) txt (aget h innerText)] (window/alert (str plain txt)) (aset h innerText here I am!))) Here, javascript object h is treated as array, and I was able to get and set its value (since it is mutable). Note that the following code doesn't work, since h is not a map, and thus we can't access its properties neither as keywords nor as names. (defn ^:export displayPlain2 [id] (let [h (.getElementById window/document id) ;; txt (get h innerText) txt (:innerText h)] (window/alert (str plain txt This makes dealing with js objects a bit mor verbose than clojure maps. It would be good if Clojure maps and JS object would be interchangeable from ClojureScript code. Would it make sense to open a bug/feature for this? I know that this is doable using closure library, but it would be nice if it could be easily doable using plain objects. (defn ^:export display [id] (let [h (dom/getElement id) txt (dom/getTextContent h)] (window/alert (str gdom txt Regards, Marko -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: ClojureScript - why is javascript object array and not a map?
Note the following code that works: (defn ^:export displayPlain [id] (let [h (.getElementById window/document id) txt (aget h innerText)] (window/alert (str plain txt)) (aset h innerText here I am!))) Here, javascript object h is treated as array, and I was able to get and set its value (since it is mutable). Note that the following code doesn't work, since h is not a map, and thus we can't access its properties neither as keywords nor as names. (defn ^:export displayPlain2 [id] (let [h (.getElementById window/document id) ;; txt (get h innerText) txt (:innerText h)] (window/alert (str plain txt This makes dealing with js objects a bit mor verbose than clojure maps. It would be good if Clojure maps and JS object would be interchangeable from ClojureScript code. Would it make sense to open a bug/feature for this? I know that this is doable using closure library, but it would be nice if it could be easily doable using plain objects. (defn ^:export display [id] (let [h (dom/getElement id) txt (dom/getTextContent h)] (window/alert (str gdom txt Regards, Marko Design is underway on this. Stay tuned. Stu Stuart Halloway Clojure/core http://clojure.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
Additional delay after pcalls?
Hello everyone, I am a beginner with clojure and I am playing around with pcalls (I am using clojure 1.2.1). I see different behavior if I run some code from inside the REPL or launching it form the command line. I have the following code in a file called test-pcalls.clj: (let [waste-time (fn [label] (dotimes [k 4] (let [msg (str label k \n)] (Thread/sleep 2000) (print msg] (dorun (pcalls #(waste-time A) #(waste-time b This just creates the function 'waste-time' which slowly (2 seconds at a time) counts 0..3 and prints a label and the count each time. Two copies of the function are then started in parallel with a different label (A and b) I start clojure and then from the REPL I do (load-file test- pcalls.clj). After 8 seconds (2 seconds x 4) I see the two sequences being printed out all in one go. First question I cannot find an aswer is: why do I see everything printed together instead of one step a time? Then I exit to the command line and then start clojure with the source file: clojure test-pcalls.clj Again after 8 seconds I see the sequences printed out as above. But now clojure hangs for a minute or so before returning to the command prompt. Can anyone explain this additional delay? 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
Re: cake create project / setup instructions
I found the new command for cake, but I get this error, so I'm a little confused as to what's going on. cake builds otherwise. cnorton@steamboy:~/projects/clojure$ cake new addr_verify unknown task: new On Jul 27, 8:50 am, octopusgrabbus octopusgrab...@gmail.com wrote: Before getting too far along, I'd like to set up my project the way I've seen other projects' configurations, like clj-http and clojure- csv. I can build my project, but it is not set up in the standard way. I am using cake, but cannot find instructions on configuring and then creating the project from scratch. tnx 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: Additional delay after pcalls?
On Wed, Jul 27, 2011 at 11:44 AM, mc4924 claudio.potenza...@gmail.com wrote: Hello everyone, I am a beginner with clojure and I am playing around with pcalls (I am using clojure 1.2.1). I see different behavior if I run some code from inside the REPL or launching it form the command line. I have the following code in a file called test-pcalls.clj: (let [waste-time (fn [label] (dotimes [k 4] (let [msg (str label k \n)] (Thread/sleep 2000) (print msg] (dorun (pcalls #(waste-time A) #(waste-time b This just creates the function 'waste-time' which slowly (2 seconds at a time) counts 0..3 and prints a label and the count each time. Two copies of the function are then started in parallel with a different label (A and b) I start clojure and then from the REPL I do (load-file test- pcalls.clj). After 8 seconds (2 seconds x 4) I see the two sequences being printed out all in one go. First question I cannot find an aswer is: why do I see everything printed together instead of one step a time? Buffering of I/O. Try using println, or adding (.flush *out*) after each print. Then I exit to the command line and then start clojure with the source file: clojure test-pcalls.clj Again after 8 seconds I see the sequences printed out as above. But now clojure hangs for a minute or so before returning to the command prompt. Can anyone explain this additional delay? Waiting for the pcalls thread pool to shut down, I expect. -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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: Additional delay after pcalls?
On 7/27/11 11:19 AM, Ken Wesson wrote: On Wed, Jul 27, 2011 at 11:44 AM, mc4924claudio.potenza...@gmail.com wrote: Hello everyone, I am a beginner with clojure and I am playing around with pcalls (I am using clojure 1.2.1). I see different behavior if I run some code from inside the REPL or launching it form the command line. I have the following code in a file called test-pcalls.clj: (let [waste-time (fn [label] (dotimes [k 4] (let [msg (str label k \n)] (Thread/sleep 2000) (print msg] (dorun (pcalls #(waste-time A) #(waste-time b This just creates the function 'waste-time' which slowly (2 seconds at a time) counts 0..3 and prints a label and the count each time. Two copies of the function are then started in parallel with a different label (A and b) I start clojure and then from the REPL I do (load-file test- pcalls.clj). After 8 seconds (2 seconds x 4) I see the two sequences being printed out all in one go. First question I cannot find an aswer is: why do I see everything printed together instead of one step a time? Buffering of I/O. Try using println, or adding (.flush *out*) after each print. Then I exit to the command line and then start clojure with the source file: clojure test-pcalls.clj Again after 8 seconds I see the sequences printed out as above. But now clojure hangs for a minute or so before returning to the command prompt. Can anyone explain this additional delay? Waiting for the pcalls thread pool to shut down, I expect. Yeah, you will want to call '(shutdown-agents)' to have Clojure shut down the thread pool it uses for agents, futures, etc.. -Ben -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: cake create project / setup instructions
cake new does work. I had run cake new in the wrong place before, so I am rebuilding the tree. Problem solved for now. On Jul 27, 1:13 pm, octopusgrabbus octopusgrab...@gmail.com wrote: I found the new command for cake, but I get this error, so I'm a little confused as to what's going on. cake builds otherwise. cnorton@steamboy:~/projects/clojure$ cake new addr_verify unknown task: new On Jul 27, 8:50 am, octopusgrabbus octopusgrab...@gmail.com wrote: Before getting too far along, I'd like to set up my project the way I've seen other projects' configurations, like clj-http and clojure- csv. I can build my project, but it is not set up in the standard way. I am using cake, but cannot find instructions on configuring and then creating the project from scratch. tnx 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: Problem with ClojureScript and Node.js
I seem to have fixed this by editing
closure/library/closure/goog/base.js and rebuilding lib/goog.jar.
The relevant line is goog.global = this; somewhere at the top where
this should be replaced by
(function(){return this})();; the bootstrap script contains the
command to create the jarfile.
I can't tell if this is the ~correct~ way of fixing this problem, but
so far it doesn't appear to have broken
anything. Tested with v0.4 branch and 0.5.2 release, both work.
Regards,
tok
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Re: Alright, fess up, who's unhappy with clojurescript?
On 27 July 2011 01:43, Mark Derricutt m...@talios.com wrote: My unhappiness with it is more akin to my unhappiness with ANY language that tries to target multiple VM platforms, and that's mostly due to the -potential- to break the community. It may be helpful to approach the issue with the premise that ClojureScript != Clojure. They share a lot of syntax and semantics, and a developer experienced in one can easily transfer his/her working knowledge to the other. But in the end, I perceive them as two different languages that just happen to have a lot in common. Enter ClojureScript, for the most part you will be able to reuse server code on the front end, but some of those libraries you've become accustomed to using just won't work, and if you're working to a deadline and suddenly hit that - you're going to become frustrated beyond all hell ;-) Personally, I wouldn't assume that anything works on ClojureScript unless explicitly tested and labeled as such. This seems like an interesting avenue to follow. This thread is already past its expiry date, though, so I doubt further discussion will get much attention here. -- 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 take-while
thanks guys, now everything is clearer to me. I really apreciate your 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: problem with take-while
On Wed, Jul 27, 2011 at 1:51 PM, axyzxp axy...@gmail.com wrote: thanks guys, now everything is clearer to me. I really apreciate your help You're welcome. -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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 write `when-lets`
On Jul 27, 5:50 am, Feng Shen shen...@gmail.com wrote: Clojure core.clj has a macro when-let, I am wondering how to write a macro `when-lets` (when-lets [symbol-1 test-1 symbol-2 test-2 ... ] body ) body only get evaluated when (and test-1 test-2 ) I am thinking about it, anybody has any clue? (defmacro when-lets [tests body] (reduce (fn [body test] `(when-let ~(vec test) ~body)) `(do ~@body) (partition 2 (reverse tests This would be cleaner if we had foldr in the language already - I find myself wanting it quite often for macros like this. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How to write `when-lets`
On Jul 27, 11:11 am, Alan Malloy a...@malloys.org wrote: On Jul 27, 5:50 am, Feng Shen shen...@gmail.com wrote: Clojure core.clj has a macro when-let, I am wondering how to write a macro `when-lets` (when-lets [symbol-1 test-1 symbol-2 test-2 ... ] body ) body only get evaluated when (and test-1 test-2 ) I am thinking about it, anybody has any clue? (defmacro when-lets [tests body] (reduce (fn [body test] `(when-let ~(vec test) ~body)) `(do ~@body) (partition 2 (reverse tests This would be cleaner if we had foldr in the language already - I find myself wanting it quite often for macros like this. Sorry, should of course be (defmacro when-lets [tests body] (reduce (fn [body test] `(when-let ~(vec test) ~body)) `(do ~@body) (reverse (partition 2 tests Apparently the reason I want foldr is because I get it wrong when I do it myself. -- 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 write `when-lets`
On Wed, Jul 27, 2011 at 2:13 PM, Alan Malloy a...@malloys.org wrote: On Jul 27, 11:11 am, Alan Malloy a...@malloys.org wrote: On Jul 27, 5:50 am, Feng Shen shen...@gmail.com wrote: Clojure core.clj has a macro when-let, I am wondering how to write a macro `when-lets` (when-lets [symbol-1 test-1 symbol-2 test-2 ... ] body ) body only get evaluated when (and test-1 test-2 ) I am thinking about it, anybody has any clue? (defmacro when-lets [tests body] (reduce (fn [body test] `(when-let ~(vec test) ~body)) `(do ~@body) (partition 2 (reverse tests This would be cleaner if we had foldr in the language already - I find myself wanting it quite often for macros like this. Sorry, should of course be (defmacro when-lets [tests body] (reduce (fn [body test] `(when-let ~(vec test) ~body)) `(do ~@body) (reverse (partition 2 tests Apparently the reason I want foldr is because I get it wrong when I do it myself. (defn foldr ([f coll] (reduce f (reverse coll))) ([f init coll] (reduce f init (reverse coll There. :) -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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 write `when-lets`
On Wed, Jul 27, 2011 at 2:15 PM, Ken Wesson kwess...@gmail.com wrote: On Wed, Jul 27, 2011 at 2:13 PM, Alan Malloy a...@malloys.org wrote: On Jul 27, 11:11 am, Alan Malloy a...@malloys.org wrote: On Jul 27, 5:50 am, Feng Shen shen...@gmail.com wrote: (defn foldr ([f coll] (reduce f (reverse coll))) ([f init coll] (reduce f init (reverse coll There. :) I may be wrong, but don't you need to swap the order of the arguments to f? -- 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 write `when-lets`
On Wed, Jul 27, 2011 at 2:35 PM, Aaron Cohen aa...@assonance.org wrote: I may be wrong, but don't you need to swap the order of the arguments to f? You can do that by writing f itself appropriately. Usually either it will be a closure or it won't matter (core +, etc.). -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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
Cake CLASSPATH Error
I originally had a project set up that built correctly, but the project directories had not been set up with cake new. I saved my project and main files; created a new project tree with cake new addr_verify; and then replaced project.clj and addr_verify.clj with the working files. Before, addr_verify.clj needed to go into addr_verify/src, and this time it went into addr_verify/src/ addr_verify. Here is my CLASSPATH /usr/share/java I'm getting this error on cake compile and am not sure how to correct the error or what to add. I would appreciate help. java.lang.RuntimeException: java.io.FileNotFoundException: Could not locate addr_verify__init.class or addr_verify.clj on classpath: this is project.clj (defproject util-str 0.0.1-SNAPSHOT :description This provides some string handling routines not found directly in Clojure's libraries. :dependencies [[org.clojure/clojure 1.2.1] [org.clojure/clojure-contrib 1.2.0] [clojure-csv/clojure-csv 1.2.4] [clj-http 0.1.3]]) this is the first few lines of addr_verify.clj (ns addr-verify (:gen-class) (:use clojure.contrib.command-line) (:require [clojure.string :as cstr]) (:require [clojure.contrib.str-utils :as ustr]) (:require [clj-http.client :as client]) (:import java.util.Date) (:import java.lang.Thread) (:use clojure-csv.core)) (def accumail-url-keys [CA, STREET, STREET2, CITY, STATE, ZIP, YR, BILL_NO, BILL_TYPE] ) (def accumail-url http://MailVerify/Lookup/chkAddr.asp;) Thanks. 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
format and printf can't be used with BigInt
Hi everyone, I don't know where to post about bugs (if this is a bug). Anyway in clojure 1.3 with the new numerics: (format %d 2N) throws IllegalFormatConversionException, is it a bug? are there any workarounds? -- 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 write `when-lets`
First: Why doesn't macroexpand expand the inner when-lets? It's not supposed to, see the doc. To do full expansion, you can use `clojure.walk/macroexpand-all`. Is the gensym in the two expands the same thing, or do they get the same name? That was surprising to me. I can't think of any real example where that is a problem. But what if I had wanted to write a macro like the second when-lets? Looks like a bug/limitation of the gensym reader macro, these symbols are treated as belonging to the same quoted form, so they get the same name. But I don't think the second macro does what you're saying - the evaluation order is the same, since `tst` is evaluated in the `let` form above `when-lets` in both cases, only the order of binding the values is reversed. To reverse the evaluation order, you need to move that `let` inside: (defmacro when-lets [bindings body] (if-not (seq bindings) `(do ~@body) (let [form (bindings 0) tst (bindings 1) rst (drop 2 bindings)] `(when-lets ~(vec rst) (let [temp# ~tst] (when temp# (let [~form temp#] ~@body))) user= (when-lets [b (inc a) a 3] (+ b a)) 7 -- 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 write `when-lets`
On Wed, Jul 27, 2011 at 2:39 PM, Ken Wesson kwess...@gmail.com wrote: On Wed, Jul 27, 2011 at 2:35 PM, Aaron Cohen aa...@assonance.org wrote: I may be wrong, but don't you need to swap the order of the arguments to f? You can do that by writing f itself appropriately. Usually either it will be a closure or it won't matter (core +, etc.). If the order of evaluation doesn't matter, you should probably just be using reduce in the first place. -- 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: Cake CLASSPATH Error
Namespace file locations start from the src directory, in your project directory. So, a file that declares namespace addr-verify should be located in src/addr_verify.clj. A file that declares namespace addr-verify.addr-verify would be found in src/addr_verify/addr_verify.clj. On Wed, Jul 27, 2011 at 2:42 PM, octopusgrabbus octopusgrab...@gmail.comwrote: I originally had a project set up that built correctly, but the project directories had not been set up with cake new. I saved my project and main files; created a new project tree with cake new addr_verify; and then replaced project.clj and addr_verify.clj with the working files. Before, addr_verify.clj needed to go into addr_verify/src, and this time it went into addr_verify/src/ addr_verify. Here is my CLASSPATH /usr/share/java I'm getting this error on cake compile and am not sure how to correct the error or what to add. I would appreciate help. java.lang.RuntimeException: java.io.FileNotFoundException: Could not locate addr_verify__init.class or addr_verify.clj on classpath: this is project.clj (defproject util-str 0.0.1-SNAPSHOT :description This provides some string handling routines not found directly in Clojure's libraries. :dependencies [[org.clojure/clojure 1.2.1] [org.clojure/clojure-contrib 1.2.0] [clojure-csv/clojure-csv 1.2.4] [clj-http 0.1.3]]) this is the first few lines of addr_verify.clj (ns addr-verify (:gen-class) (:use clojure.contrib.command-line) (:require [clojure.string :as cstr]) (:require [clojure.contrib.str-utils :as ustr]) (:require [clj-http.client :as client]) (:import java.util.Date) (:import java.lang.Thread) (:use clojure-csv.core)) (def accumail-url-keys [CA, STREET, STREET2, CITY, STATE, ZIP, YR, BILL_NO, BILL_TYPE] ) (def accumail-url http://MailVerify/Lookup/chkAddr.asp;) Thanks. 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: Cake CLASSPATH Error
Thanks. It appears it was set up correctly all along, but didn't have the extra directories created by cake new. On Jul 27, 3:09 pm, Mark Rathwell mark.rathw...@gmail.com wrote: Namespace file locations start from the src directory, in your project directory. So, a file that declares namespace addr-verify should be located in src/addr_verify.clj. A file that declares namespace addr-verify.addr-verify would be found in src/addr_verify/addr_verify.clj. On Wed, Jul 27, 2011 at 2:42 PM, octopusgrabbus octopusgrab...@gmail.comwrote: I originally had a project set up that built correctly, but the project directories had not been set up with cake new. I saved my project and main files; created a new project tree with cake new addr_verify; and then replaced project.clj and addr_verify.clj with the working files. Before, addr_verify.clj needed to go into addr_verify/src, and this time it went into addr_verify/src/ addr_verify. Here is my CLASSPATH /usr/share/java I'm getting this error on cake compile and am not sure how to correct the error or what to add. I would appreciate help. java.lang.RuntimeException: java.io.FileNotFoundException: Could not locate addr_verify__init.class or addr_verify.clj on classpath: this is project.clj (defproject util-str 0.0.1-SNAPSHOT :description This provides some string handling routines not found directly in Clojure's libraries. :dependencies [[org.clojure/clojure 1.2.1] [org.clojure/clojure-contrib 1.2.0] [clojure-csv/clojure-csv 1.2.4] [clj-http 0.1.3]]) this is the first few lines of addr_verify.clj (ns addr-verify (:gen-class) (:use clojure.contrib.command-line) (:require [clojure.string :as cstr]) (:require [clojure.contrib.str-utils :as ustr]) (:require [clj-http.client :as client]) (:import java.util.Date) (:import java.lang.Thread) (:use clojure-csv.core)) (def accumail-url-keys [CA, STREET, STREET2, CITY, STATE, ZIP, YR, BILL_NO, BILL_TYPE] ) (def accumail-url http://MailVerify/Lookup/chkAddr.asp;) Thanks. 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 write `when-lets`
On Jul 27, 11:57 am, Aaron Cohen aa...@assonance.org wrote: On Wed, Jul 27, 2011 at 2:39 PM, Ken Wesson kwess...@gmail.com wrote: On Wed, Jul 27, 2011 at 2:35 PM, Aaron Cohen aa...@assonance.org wrote: I may be wrong, but don't you need to swap the order of the arguments to f? You can do that by writing f itself appropriately. Usually either it will be a closure or it won't matter (core +, etc.). If the order of evaluation doesn't matter, you should probably just be using reduce in the first place. I wrote my foldr to swap the order of arguments to f, but I think Ken's right not to. Having acc be on the right is a good reminder that you're folding right, and makes some of the most common patterns, like (cons x acc) look natural. -- 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 write `when-lets`
On Jul 27, 11:56 am, Dmitry Gutov raa...@gmail.com wrote: First: Why doesn't macroexpand expand the inner when-lets? It's not supposed to, see the doc. To do full expansion, you can use `clojure.walk/macroexpand-all`. Is the gensym in the two expands the same thing, or do they get the same name? That was surprising to me. I can't think of any real example where that is a problem. But what if I had wanted to write a macro like the second when-lets? Looks like a bug/limitation of the gensym reader macro, these symbols are treated as belonging to the same quoted form, so they get the same name. Nothing to do with being the same quoted form: foo# symbols are gensymmed at read time, so by the time the macro runs there's no evidence that they were ever gensyms: just a symbol named temp__1551__auto__, and it has no reason to suppose you intend them to be different. I don't think this is a problem for many (any?) macros, but if you want more control you can gensym yourself: (defmacro when-lets [bindings body] (if-not (seq bindings) `(do ~@body) (let [temp (gensym) form (bindings 0) tst (bindings 1) rst (drop 2 bindings)] `(let [~temp ~tst] (when ~temp (when-lets ~(vec rst) (let [~form ~temp] ~@body))) user (use 'clojure.walk) (macroexpand-all '(when-lets [a 1 b 2] [a b])) (let* [G__1815 1] (if G__1815 (do (let* [G__1816 2] (if G__1816 (do (do (let* [b G__1816] (let* [a G__1815] [a b]) user (when-lets [a 1 b 2] [a b]) [1 2] -- 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: format and printf can't be used with BigInt
On Jul 27, 11:45 am, Andrea Tortorella elian...@gmail.com wrote: Hi everyone, I don't know where to post about bugs (if this is a bug). Anyway in clojure 1.3 with the new numerics: (format %d 2N) throws IllegalFormatConversionException, is it a bug? are there any workarounds? Unlikely to change anytime soon: format just calls java.util.Formatter.format; if you look at the source of that, it tests for each built-in numeric type specially, instead of using Number. But you can probably use the %s specifier, since converting it to a string is unlikely to do much harm. -- 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 write `when-lets`
On Wed, Jul 27, 2011 at 2:57 PM, Aaron Cohen aa...@assonance.org wrote: On Wed, Jul 27, 2011 at 2:39 PM, Ken Wesson kwess...@gmail.com wrote: On Wed, Jul 27, 2011 at 2:35 PM, Aaron Cohen aa...@assonance.org wrote: I may be wrong, but don't you need to swap the order of the arguments to f? You can do that by writing f itself appropriately. Usually either it will be a closure or it won't matter (core +, etc.). If the order of evaluation doesn't matter, you should probably just be using reduce in the first place. True. But the point is that for the likely core functions to use in foldr/reduce, the argument order doesn't matter, so when it does you're likely using a local closure rather than an elsewhere-defined function anyway. It does occur to me, though, that if an operation is commutative, but not associative, then foldr and reduce might give different results even in a case where swapping the function arguments' order doesn't do so. It's just very rare for an operation that's not associative to be commutative. Common math operations for instance are both (*, +), neither (/, -), or associative but not commutative (matrix multiplication, composition of functions), with clojure.core furnishing examples in all three categories (* and +; / and -; comp). -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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 write `when-lets`
On Wed, Jul 27, 2011 at 3:23 PM, Alan Malloy a...@malloys.org wrote: On Jul 27, 11:56 am, Dmitry Gutov raa...@gmail.com wrote: First: Why doesn't macroexpand expand the inner when-lets? It's not supposed to, see the doc. To do full expansion, you can use `clojure.walk/macroexpand-all`. Is the gensym in the two expands the same thing, or do they get the same name? That was surprising to me. I can't think of any real example where that is a problem. But what if I had wanted to write a macro like the second when-lets? Looks like a bug/limitation of the gensym reader macro, these symbols are treated as belonging to the same quoted form, so they get the same name. Nothing to do with being the same quoted form: foo# symbols are gensymmed at read time, so by the time the macro runs there's no evidence that they were ever gensyms: just a symbol named temp__1551__auto__, and it has no reason to suppose you intend them to be different. I'd say it's a bug. This sort of capture/shadowing simply should not happen in Clojure macros without the user jumping through hoops to specifically enable it (e.g. ~'foo; ~(symbol ...)). If the reader is turning the foo#s in a particular syntax-quoted expression into a fixed symbol, I say it should instead be turning `(... foo# ... foo# ...) into an implicit (let [foo (gensym)] `(... ~foo ... ~foo ...)), which the compiler will then turn into code that generates a separate gensym for each invocation of the containing macro, as seems desirable and necessary to avoid the sort of problem observed in this thread. Of course, the implicit let binding needs to be something that won't collide with anything else around, but using the pre-# part of the symbol, as with foo above, ought to suffice for that. When was the last time you saw anyone combine foo# and ~foo, meaning different things, in the same syntax quote? Or use foo# itself as the symbol name. As I understand it, once past the reader layer that's as valid an identifier as any, but one the reader will barf on in any other context. Or, for added meta fun, use (gensym 'foo) to generate it. :) -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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: format and printf can't be used with BigInt
On Wed, Jul 27, 2011 at 4:33 PM, Alan Malloy a...@malloys.org wrote: On Jul 27, 11:45 am, Andrea Tortorella elian...@gmail.com wrote: Hi everyone, I don't know where to post about bugs (if this is a bug). Anyway in clojure 1.3 with the new numerics: (format %d 2N) throws IllegalFormatConversionException, is it a bug? are there any workarounds? Unlikely to change anytime soon: format just calls java.util.Formatter.format; if you look at the source of that, it tests for each built-in numeric type specially, instead of using Number. But you can probably use the %s specifier, since converting it to a string is unlikely to do much harm. Of course none of the nice number-specific formatting options are available then. If you don't mind loss of precision in less-significant digits, you might use %f and (double the-number) to format its coercion to double. But according to http://download.oracle.com/javase/6/docs/api/java/util/Formatter.html Formatter *is* supposed to work with BigInteger with %d (and other integer-formatting options, and with BigDecimal with %f and other float-formatting options). So I don't know what's going wrong here, other than that it also says IllegalFormatConversionException gets thrown if the format symbol and the parameter are mismatched. The JavaSE 6 Formatter works properly when invoked explicitly via interop: = (.format (java.util.Formatter.) %d (into-array Object [(bigint 2)])) #Formatter 2 (2N isn't recognized as a BigInteger literal by Clojure 1.2, it seems.) In my copy of Clojure 1.2, format also seems to work: = (format %d (bigint 2)) 2 So this could be a bug in 1.3 the OP is running into, or else 2N is turning into something other than what (bigint 2) evaluates to. = (format %d #=(bigint 2)) 2 also works for me, and is more closely equivalent to what the OP is trying to do (as the bigint is embedded directly in the code via the reader rather than constructed on the fly at eval time). It looks like either 2N is doing something unexpected or the format function somehow broke in 1.3. -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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: format and printf can't be used with BigInt
On Wed, Jul 27, 2011 at 4:32 PM, Ken Wesson kwess...@gmail.com wrote: = (.format (java.util.Formatter.) %d (into-array Object [(bigint 2)])) #Formatter 2 (2N isn't recognized as a BigInteger literal by Clojure 1.2, it seems.) In my copy of Clojure 1.2, format also seems to work: = (format %d (bigint 2)) 2 In Clojure 1.2: (type (bigint 2)) = java.math.BigInteger In Clojure 1.3: (type (bigint 2)) = clojure.lang.BigInt (type 2N) = clojure.lang.BigInt clojure.lang.BigInt != java.math.BigInteger which is why format no longer works. You can do this: (format %d (.toBigInteger 2N)) -- 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
ClojureQL: debugging generated SQL / Dates
I'm trying to figure out how to send a jodatime date into Postgres, for example
to generate this SQL:
SELECT animals.* FROM animals WHERE removed_from_service = '2001-11-11'
Along the way, I've discovered that the SQL queries ClojureQL prints out can't
be the ones it actually sends. Consider, for example, this:
user (ql/select (ql/table :animals)
(ql/where (in :official_name [1 2 2])))
SELECT animals.* FROM animals WHERE official_name IN (1,2 2)
If you run the query, it seems to work. But that SELECT won't work if you type
it at Postgres. The correct syntax should be:
SELECT animals.* FROM animals WHERE official_name IN ('1','2 2')
Is the REPL command I typed not the right way to see what SQL is sent to the
database?
How *does* one provide dates to ClojureQL for transmission to Postgres? I want
to do something like this:
(ql/conj! (ql/table :animals) {:official_name fred :added_to_service
something that counts as a SQL Date})
-
Brian Marick, Artisanal Labrador
Contract programming in Ruby and Clojure
Occasional consulting on Agile
www.exampler.com, www.twitter.com/marick
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Bizarre ClojureScript issue
Sorry for the terrible subject line. I couldn't think of an easy way to describe the problem in a single line. (def net (node/require net)) (defn portal [port host] (.createConnection net port host)) (defn -main [ args] ; Note that only one of these -main functions is in the file at any given time, of course. (.createConnection net 1337 localhost)) (defn -main [ args] (portal 1337 localhost)) (set! *main-cli-fn* -main) For some reason, the first -main above works fine but the second doesn't. When I use the second and try to run it, I get this: TypeError: Cannot read property 'net' of undefined Why would my 'portal' function not be able to see 'net', or is that even what this means? I'm unfamiliar with these JavaScriptish error messages. : I have no idea what is causing this. I reviewed the node example in the sample directory and I don't see what I'm missing. It's odd that it works fine in -- 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: Bizarre ClojureScript issue
It's odd that it works fine in the first one but no the second. You'd think with that post button being so small that it'd be difficult to... yeah. -- 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: Bizarre ClojureScript issue
are you sure you don't have an extra space in there? (. createConnection net …) vs. (.createConnection net …) On Wed, Jul 27, 2011 at 5:38 PM, Anthony Grimes disciplera...@gmail.com wrote: Sorry for the terrible subject line. I couldn't think of an easy way to describe the problem in a single line. (def net (node/require net)) (defn portal [port host] (.createConnection net port host)) (defn -main [ args] ; Note that only one of these -main functions is in the file at any given time, of course. (.createConnection net 1337 localhost)) (defn -main [ args] (portal 1337 localhost)) (set! *main-cli-fn* -main) For some reason, the first -main above works fine but the second doesn't. When I use the second and try to run it, I get this: TypeError: Cannot read property 'net' of undefined Why would my 'portal' function not be able to see 'net', or is that even what this means? I'm unfamiliar with these JavaScriptish error messages. : I have no idea what is causing this. I reviewed the node example in the sample directory and I don't see what I'm missing. It's odd that it works fine in -- 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 -- And what is good, Phaedrus, And what is not good— Need we ask anyone to tell us these things? -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com 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: Bizarre ClojureScript issue
Yep, just double checked. No extra spaces. -- 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: Bizarre ClojureScript issue
have you looked at the generated javascript? On Wed, Jul 27, 2011 at 5:44 PM, Anthony Grimes disciplera...@gmail.com wrote: Yep, just double checked. No extra spaces. -- 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 -- And what is good, Phaedrus, And what is not good— Need we ask anyone to tell us these things? -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com 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: format and printf can't be used with BigInt
On Wed, Jul 27, 2011 at 8:25 PM, Sean Corfield seancorfi...@gmail.com wrote:
On Wed, Jul 27, 2011 at 4:32 PM, Ken Wesson kwess...@gmail.com wrote:
= (.format (java.util.Formatter.) %d (into-array Object [(bigint 2)]))
#Formatter 2
(2N isn't recognized as a BigInteger literal by Clojure 1.2, it seems.)
In my copy of Clojure 1.2, format also seems to work:
= (format %d (bigint 2))
2
In Clojure 1.2:
(type (bigint 2)) = java.math.BigInteger
In Clojure 1.3:
(type (bigint 2)) = clojure.lang.BigInt
(type 2N) = clojure.lang.BigInt
What the devil? Why was this done? Seems like wheel reinvention to me.
And format should account for it. A simple change will do it:
(defn format
Formats a string using java.lang.String.format, see
java.util.Formatter for format
string syntax
{:added 1.0
:static true}
^String [fmt args]
(String/format fmt (to-array (map fixup args
where
(defn fixup [o]
(cond
(instance? clojure.lang.BigInt o) (.toBigInteger o)
...
:else o))
Of course, this suggests a generalization of condp:
(defn replace [rmap coll]
(let [s (map #(if-let [[_ v] (find rmap %)] v %) coll)]
(if (seq? coll)
s
(into (empty coll) s
(defmacro condx [symb expr clauses]
(let [default (if (odd? (count clauses)) [:else (last clauses)] [])]
`(cond
~@(mapcat
(fn [[v x]]
[(replace {symb v} expr) x])
(partition 2 clauses))
~@default)))
(defn fixup [o]
(condx class (instance? class o)
clojure.lang.BigInt (.toBigInteger o)
...
o))
Of course, full flexibility might warrant a multimethod for fixup so
that format can be extended to any type. Format tends to occur in I/O
bound code so the runtime overhead of multimethods is probably
acceptable -- indeed, the pprint contrib library already employs them
in a very similar role.
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Re: Bizarre ClojureScript issue
Yeah. To the extent that I can read Javascript, the calls look exactly the same and it looks fine. -- 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: Bizarre ClojureScript issue
On Wed, Jul 27, 2011 at 8:38 PM, Anthony Grimes disciplera...@gmail.com wrote: Sorry for the terrible subject line. I couldn't think of an easy way to describe the problem in a single line. (def net (node/require net)) (defn portal [port host] (.createConnection net port host)) (defn -main [ args] ; Note that only one of these -main functions is in the file at any given time, of course. (.createConnection net 1337 localhost)) (defn -main [ args] (portal 1337 localhost)) (set! *main-cli-fn* -main) For some reason, the first -main above works fine but the second doesn't. When I use the second and try to run it, I get this: TypeError: Cannot read property 'net' of undefined Why would my 'portal' function not be able to see 'net', Caveat: I'm by no means a ClojureScript expert. But maybe net is a private member of a class of which -main ends up a method, somewhat like how gen-class works in plain Clojure, and so -main can see it whereas portal, as a free-standing function, can't? -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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: Bizarre ClojureScript issue
That's actually what I thought at first, but the node example that ships
with ClojureScript actually does the same thing (uses a node function
outside of -main and then calls that function from -main) I did and it works
fine.
Here is the generated JavaScript for the failing -main and such:
portal.core.net = cljs.nodejs.require.call(null, net);
portal.core.portal = function portal(b, c) {
return portal.core.net.createConnection(b, c)
};
portal.core._main = function(a) {
cljs.core.array_seq(Array.prototype.slice.call(arguments, 0), 0);
return portal.core.portal.call(null, 1337, localhost)
};
And here is the generated JS for the working -main:
portal.core._main = function(a) {
cljs.core.array_seq(Array.prototype.slice.call(arguments, 0), 0);
return portal.core.net.createConnection(1337, localhost)
};
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Re: Bizarre ClojureScript issue
On Wed, Jul 27, 2011 at 9:05 PM, Anthony Grimes disciplera...@gmail.com wrote:
That's actually what I thought at first, but the node example that ships
with ClojureScript actually does the same thing (uses a node function
outside of -main and then calls that function from -main) I did and it works
fine.
Here is the generated JavaScript for the failing -main and such:
portal.core.net = cljs.nodejs.require.call(null, net);
portal.core.portal = function portal(b, c) {
return portal.core.net.createConnection(b, c)
};
portal.core._main = function(a) {
cljs.core.array_seq(Array.prototype.slice.call(arguments, 0), 0);
return portal.core.portal.call(null, 1337, localhost)
};
And here is the generated JS for the working -main:
portal.core._main = function(a) {
cljs.core.array_seq(Array.prototype.slice.call(arguments, 0), 0);
return portal.core.net.createConnection(1337, localhost)
};
The generated portal function seems to want two arguments (b, c) but
it's called with (null, 1337, localhost). Should that be happening?
Not that that should cause portal.core.net to not resolve.
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Re: Bizarre ClojureScript issue
The first argument to Javascript's 'call' is a 'this' argument. All generated functions are called like this. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Bizarre ClojureScript issue
On Wed, Jul 27, 2011 at 9:21 PM, Anthony Grimes disciplera...@gmail.com wrote: The first argument to Javascript's 'call' is a 'this' argument. All generated functions are called like this. If portal.core.net is an instance rather than a class variable then a null this would explain it not resolving. Is _main called with (null, arguments) or with (some_portal.core_object, arguments)? -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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: Bizarre ClojureScript issue
It looks like main is called the same way. Like I said, my example is not much different than the one that comes with cljs. (ns nodels (:require [cljs.nodejs :as nodejs])) (def fs (nodejs/require fs)) (def path (nodejs/require path)) (defn file-seq [dir] (tree-seq (fn [f] (.isDirectory (.statSync fs f) ())) (fn [d] (map #(.join path d %) (.readdirSync fs d))) dir)) (defn -main [ paths] (dorun (map println (mapcat file-seq paths (set! *main-cli-fn* -main) The above example is the one I'm talking about and works fine. It's weird. -- 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: Bizarre ClojureScript issue
On Wed, Jul 27, 2011 at 9:30 PM, Anthony Grimes disciplera...@gmail.com wrote: It looks like main is called the same way. Like I said, my example is not much different than the one that comes with cljs. (ns nodels (:require [cljs.nodejs :as nodejs])) (def fs (nodejs/require fs)) (def path (nodejs/require path)) (defn file-seq [dir] (tree-seq (fn [f] (.isDirectory (.statSync fs f) ())) (fn [d] (map #(.join path d %) (.readdirSync fs d))) dir)) (defn -main [ paths] (dorun (map println (mapcat file-seq paths (set! *main-cli-fn* -main) The above example is the one I'm talking about and works fine. It's weird. I see some maybe-salient differences: 1. The working example has an ns form. Maybe being in the JS equivalent of the default package is causing problems? 2. The working example has nodejs/require instead of node/require in the defs. However, if you're using (ns something (:require [cljs.nodejs :as node])) and just didn't post it then neither of those can be related to the cause... -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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: Bizarre ClojureScript issue
Is it possible that the new function called portal is overwriting the
namespace called portal? Could you try renaming the function called
portal to something else? Like portal2?
On Wed, Jul 27, 2011 at 6:05 PM, Anthony Grimes disciplera...@gmail.com wrote:
That's actually what I thought at first, but the node example that ships
with ClojureScript actually does the same thing (uses a node function
outside of -main and then calls that function from -main) I did and it works
fine.
Here is the generated JavaScript for the failing -main and such:
portal.core.net = cljs.nodejs.require.call(null, net);
portal.core.portal = function portal(b, c) {
return portal.core.net.createConnection(b, c)
};
portal.core._main = function(a) {
cljs.core.array_seq(Array.prototype.slice.call(arguments, 0), 0);
return portal.core.portal.call(null, 1337, localhost)
};
And here is the generated JS for the working -main:
portal.core._main = function(a) {
cljs.core.array_seq(Array.prototype.slice.call(arguments, 0), 0);
return portal.core.net.createConnection(1337, localhost)
};
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Re: Bizarre ClojureScript issue
Hah! That was it! You, sir, are one clever fellow. Thank you very much. -- 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: format and printf can't be used with BigInt
On Jul 27, 2011, at 8:56 PM, Ken Wesson wrote: In Clojure 1.2: (type (bigint 2)) = java.math.BigInteger In Clojure 1.3: (type (bigint 2)) = clojure.lang.BigInt (type 2N) = clojure.lang.BigInt What the devil? Why was this done? Seems like wheel reinvention to me. See http://dev.clojure.org/display/doc/Enhanced+Primitive+Support: * BigInt provides hashcodes consistent with Long through the range of long * BigInts will enable optimizations when [operations fit] in long (not yet implemented) - Chas -- 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: Bizarre ClojureScript issue
On Wed, Jul 27, 2011 at 9:48 PM, Anthony Grimes disciplera...@gmail.com wrote: Hah! That was it! You, sir, are one clever fellow. Thank you very much. Damn. I didn't think of that. In normal Clojure, defn'ing x.y/x doesn't clobber the Java package named x with a function named x. But it looks like in JS packages and functions go into the same namespace, so the defn shadows portal later on and portal.net looks for a member net in the portal function object instead of the portal namespace. Another gotcha with ClojureScript vs. Clojure, where a function named portal.core/portal would work fine. The error message could clearly stand some improvement: it should clearly identify the object it was trying to find something in. Instead of TypeError: Cannot read property 'net' of undefined it should have said TypeError: Cannot read property 'net' of 'portal', which is an object of type 'function' or something. Then it would have been clear it was looking inside the function object instead of a namespace object for net. The fix for this may be quite simple: have the compiler generate code to pass the function object instead of null as the first parameter when it generates those .call calls. :P -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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
Generated nodejs code from ClojureScript doesn't include some functions
This is an odd one. It seems that, when new functions are added to cljs.core, the code generated when you compile targeting nodejs doesn't include them. I noticed this initially when I pulled this commit https://github.com/clojure/clojurescript/commit/3b3ed7783ebbd07fec6772b6a1bca4ed32924fb8 and then tried to use 'rand'. I checked the generated code and rand is not defined anywhere. It works if I don't target nodejs (that works differently because it doesn't generate a file with the core functions and your code in it together) and it works from the REPL. I've quadruple checked my classpath and it's the same classpath every time. It only happens when I target nodejs. Any ideas? -- 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: Generated nodejs code from ClojureScript doesn't include some functions
I guess I should have added that it's not just rand that isn't being included. It's all of the recently added functions. Check the commit log. -- 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 write `when-lets`
On Jul 27, 8:56 pm, Dmitry Gutov raa...@gmail.com wrote: First: Why doesn't macroexpand expand the inner when-lets? It's not supposed to, see the doc. To do full expansion, you can use `clojure.walk/macroexpand-all`. Oh, yeah. Thanks! Is the gensym in the two expands the same thing, or do they get the same name? That was surprising to me. I can't think of any real example where that is a problem. But what if I had wanted to write a macro like the second when-lets? Looks like a bug/limitation of the gensym reader macro, these symbols are treated as belonging to the same quoted form, so they get the same name. But I don't think the second macro does what you're saying - the evaluation order is the same Yes of course. I was tired yesterday. :) , since `tst` is evaluated in the `let` form above `when-lets` in both cases, only the order of binding the values is reversed. To reverse the evaluation order, you need to move that `let` inside: (defmacro when-lets [bindings body] (if-not (seq bindings) `(do ~@body) (let [form (bindings 0) tst (bindings 1) rst (drop 2 bindings)] `(when-lets ~(vec rst) (let [temp# ~tst] (when temp# (let [~form temp#] ~@body))) user= (when-lets [b (inc a) a 3] (+ b a)) 7 -- 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 write `when-lets`
On Jul 27, 9:23 pm, Alan Malloy a...@malloys.org wrote: On Jul 27, 11:56 am, Dmitry Gutov raa...@gmail.com wrote: First: Why doesn't macroexpand expand the inner when-lets? It's not supposed to, see the doc. To do full expansion, you can use `clojure.walk/macroexpand-all`. Is the gensym in the two expands the same thing, or do they get the same name? That was surprising to me. I can't think of any real example where that is a problem. But what if I had wanted to write a macro like the second when-lets? Looks like a bug/limitation of the gensym reader macro, these symbols are treated as belonging to the same quoted form, so they get the same name. Nothing to do with being the same quoted form: foo# symbols are gensymmed at read time, so by the time the macro runs there's no evidence that they were ever gensyms: just a symbol named temp__1551__auto__, and it has no reason to suppose you intend them to be different. I don't think this is a problem for many (any?) macros, but if you want more control you can gensym yourself: Right! Thanks! (defmacro when-lets [bindings body] (if-not (seq bindings) `(do ~@body) (let [temp (gensym) form (bindings 0) tst (bindings 1) rst (drop 2 bindings)] `(let [~temp ~tst] (when ~temp (when-lets ~(vec rst) (let [~form ~temp] ~@body))) user (use 'clojure.walk) (macroexpand-all '(when-lets [a 1 b 2] [a b])) (let* [G__1815 1] (if G__1815 (do (let* [G__1816 2] (if G__1816 (do (do (let* [b G__1816] (let* [a G__1815] [a b]) user (when-lets [a 1 b 2] [a b]) [1 2] -- 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
