interests in Clojure internals
Hello everyone, I really have interests in internals of Cojure. I'm not talking about massive details of its implementation but rather some kind of overview/architecture of the language itself. I also know that reading source code is one of the best ways to understand it but it's not easy for me to start because I don't have a big picture. Is there any introduction articles/books online that could be reached? even a few pieces that talk about its internal could be great helps too. Or maybe some materials/books about language/compiler designing could help me better understand these stuffs?? Thanks, Jaime -- You 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: interests in Clojure internals
On Thu, Jun 7, 2012 at 4:41 AM, jaime xiejianm...@gmail.com wrote: I really have interests in internals of Cojure. I'm not talking about massive details of its implementation but rather some kind of overview/architecture of the language itself. I also know that reading source code is one of the best ways to understand it but it's not easy for me to start because I don't have a big picture. Is there any introduction articles/books online that could be reached? even a few pieces that talk about its internal could be great helps too. Or maybe some materials/books about language/compiler designing could help me better understand these stuffs?? I'm assuming you've read it, but this is the best I know of: http://clojure.org/Reference -- In Christ, Timmy V. http://blog.twonegatives.com/ http://five.sentenc.es/ -- Spend less time on mail -- You 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: interests in Clojure internals
On Thu, Jun 7, 2012 at 3:41 AM, jaime xiejianm...@gmail.com wrote: Hello everyone, I really have interests in internals of Cojure. I'm not talking about massive details of its implementation but rather some kind of overview/architecture of the language itself. I also know that reading source code is one of the best ways to understand it but it's not easy for me to start because I don't have a big picture. Is there any introduction articles/books online that could be reached? even a few pieces that talk about its internal could be great helps too. Or maybe some materials/books about language/compiler designing could help me better understand these stuffs?? While I think the project is still in a very incomplete stage you can find quite a bit of information in Tim Daly's re-organization of the Clojure source code in literate form: http://daly.axiom-developer.org/clojure.pdf http://daly.axiom-developer.org/clojure.pamphlet Thanks, Jaime -- You 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: interests in Clojure internals
Any project like https://github.com/codereading/HQ ? for Clojure some materials/books about language/compiler designing could help me better understand these stuffs?? While I think the project is still in a very incomplete stage you can find quite a bit of information in Tim Daly's re-organization of the Clojure source code in literate form: http://daly.axiom-developer.org/clojure.pdf http://daly.axiom-developer.org/clojure.pamphlet Thanks, Jaime -- You 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: Improvents on agent,user-custom thread pool.
I just came across this thread (and also [1]) when I was googling for a way to customize the Clojure agents. Were any of these 'post 1.2' suggestions reconsidered since then? (I see they haven't been implemented yet). Marek. [1] https://groups.google.com/forum/?fromgroups#!topic/clojure-dev/qDfxSoesp4o On Monday, July 26, 2010 2:54:29 AM UTC+2, Alex Miller wrote: Hey Dennis, I suggested some of the same ideas here (http://tech.puredanger.com/ 2010/06/08/clojure-agent-thread-pools/http://tech.puredanger.com/2010/06/08/clojure-agent-thread-pools/) and Rich said that these seemed like good suggestions post-1.2. I think allowing you to modify the agent thread pools after construction seems possibly dangerous from a concurrency point of view, but maybe that would be ok. Alex On Jul 25, 3:47 am, dennis killme2...@gmail.com wrote: Agent use two thread pools to execute actions,send use a fixed thread pool (2+cpus threads),and send-off use a cached thread pool.These pools are global in clojure system. I think the Agent should allow users to customize the thread pool, if no custom, then use the global thread pool. Why do I need a custom thread pool? First, the default thread pool is global, send use the thread pool is a fixed size cpus +2, is likely to become the system bottleneck sometime. Although you can use the send-off, use the cache thread pool, but in a real world application, I can not use the cache thread pool, which will introduce the risk of OutOfMemoryError, normally I like to use a fixed-size thread pool. Second, the actions which global thread pool execute are from a variety of agents, the actions are not homogeneous, and can not maximize the efficient use of the thread pool, we hope that you can specify different agent to isolate a particular thread pool to maximize the use of thread pool . I think Agent could add two new functions: (set-executor! agent (java.util.concurrent.Executors/ newFixedThreadPool 2)) (shutdown-agent agent) set-executor! is to set the agent's custom thread pool,and shutdown- agent to shutdown the agent's custom thread pool. -- You 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: Can we use Clojure like a general library in Java?
Thank you! It seems a good begin. 2012/6/3 Karl Krukow karl.kru...@gmail.com Regarding those... Some time ago I created a project containing only the persistent data structures for use with Java et al. https://github.com/krukow/clj-ds It is the data structures only so no bootstrap penalty. There are also Java'ish improvements like basic Generics and improved performance on the iterator pattern. It's still on Clojure 1.3 (As far as I recall), but I am planning on taking another iteration. TODO: - better Generics support - more data structures (tries, RRB-trees) - include the reducers library support for parallelism given this is a spare time project, I welcome everyone interested to contribute. /Karl On 02/06/2012, at 23.00, Philip Potter wrote: Yes it can! It's just a jar file after all, so you can use the classes in your java program if you like. However, clojure data structures typically do not use static typing as java uses it. For example, PersistentVector is a collection of Objects and not genericized. Getting things out of such a vector will no doubt require typecasting, just like the old 1.4 days. Phil On Jun 2, 2012 9:25 PM, Qihui Sun qihui@gmail.com wrote: Hi,the Thoughtworks technology radar mentioned below: http://www.thoughtworks.com/articles/technology-radar-march-2012 Functional programming continues its slow but steady ascent into developer mind share and, increasingly, code bases. New languages like Clojure, Scala, and F# offer great new features. Now libraries such as*Functional Java*,* TotallyLazy and LambdaJ* are back porting some functional language capabilities, particularly around higher-order functions and collections, into Java. We like this trend because it previews common capabilities of future languages yet allows developers to stay in their comfort zone. So I am interested,if Clojure can be used like a general library in Java,it will beat above libraries and be awesome ! -- Solomon HUAWEI http://www.huawei.com/ Google+: Qihui Sun http://gplus.to/sunqihui -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- Solomon HUAWEI http://www.huawei.com/ Google+: Qihui Sun http://gplus.to/sunqihui -- You 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
Strange evaluation result of the quoted form on 1.3
I'm curious why the following form evaluates to 2: (defn foo [ more] (println foo( more ))) (defn bar [v] (apply (first v) (rest v))) (bar '(foo 1 2)) If the form (bar '(foo 1 2)) extended to, say, (bar '(foo 1 2 3 4)) the arity exception will be thrown. The behavior can be reproduced after picking another names for foo and/or bar functions. -- You 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: Strange evaluation result of the quoted form on 1.3
you' are calling (apply 'foo '(1 2)), what you want is (apply foo '(1 2)) just call bar as (bar (list foo 1 2)) 2012/6/7 Alex Shabanov avshaba...@gmail.com I'm curious why the following form evaluates to 2: (defn foo [ more] (println foo( more ))) (defn bar [v] (apply (first v) (rest v))) (bar '(foo 1 2)) If the form (bar '(foo 1 2)) extended to, say, (bar '(foo 1 2 3 4)) the arity exception will be thrown. The behavior can be reproduced after picking another names for foo and/or bar functions. -- You 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: Strange evaluation result of the quoted form on 1.3
Oh, I see. This is because of the reader that interprets symbols from the
quoted forms in different way it does for the unquoted ones (and this
feature still strikes me as odd).
To make matters more complicated the quoted symbols seems to have some
meanings as functions for the clojure, since ('foo 1) - nil, ('foo 1 2) -
2, ('foo 1 2 3 4) - arity exception.
четверг, 7 июня 2012 г., 20:05:43 UTC+4 пользователь Bronsa написал:
you' are calling (apply 'foo '(1 2)), what you want is (apply foo '(1 2))
just call bar as
(bar (list foo 1 2))
2012/6/7 Alex Shabanov avshaba...@gmail.com
I'm curious why the following form evaluates to 2:
(defn foo [ more]
(println foo( more )))
(defn bar [v]
(apply (first v) (rest v)))
(bar '(foo 1 2))
If the form (bar '(foo 1 2)) extended to, say, (bar '(foo 1 2 3 4)) the
arity exception will be thrown.
The behavior can be reproduced after picking another names for foo and/or
bar functions.
--
You 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: Strange evaluation result of the quoted form on 1.3
A quoted symbol is just a literal symbol typed object. These symbols
act as functions where they evaluate like this:
('x 1) = (get 1 'x) - look itself up in its argument
('x 1 2) = (get 1 'x 2) - look itself up in its argument with a
not-found value.
So, in your example:
(bar '(foo 1 2)) tries to run ('foo 1 2). 'foo can't find itself in
the map 1 (because it's not a map), so it returns the default value
provided (in this case: 2).
On Fri, Jun 8, 2012 at 2:23 AM, Alex Shabanov avshaba...@gmail.com wrote:
Oh, I see. This is because of the reader that interprets symbols from the
quoted forms in different way it does for the unquoted ones (and this
feature still strikes me as odd).
To make matters more complicated the quoted symbols seems to have some
meanings as functions for the clojure, since ('foo 1) - nil, ('foo 1 2) -
2, ('foo 1 2 3 4) - arity exception.
четверг, 7 июня 2012 г., 20:05:43 UTC+4 пользователь Bronsa написал:
you' are calling (apply 'foo '(1 2)), what you want is (apply foo '(1 2))
just call bar as
(bar (list foo 1 2))
2012/6/7 Alex Shabanov avshaba...@gmail.com
I'm curious why the following form evaluates to 2:
(defn foo [ more]
(println foo( more )))
(defn bar [v]
(apply (first v) (rest v)))
(bar '(foo 1 2))
If the form (bar '(foo 1 2)) extended to, say, (bar '(foo 1 2 3 4)) the
arity exception will be thrown.
The behavior can be reproduced after picking another names for foo and/or
bar functions.
--
You received this message because you are subscribed to the Google
Groups Clojure group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with
your first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
--
You received this message because you are subscribed to the Google
Groups Clojure group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
--
You received this message because you are subscribed to the Google
Groups Clojure group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
Re: Strange evaluation result of the quoted form on 1.3
yes, symbols like keywords lookup themselves into the second element, or
return the third if they cannot find their value
('a {'a 1} 2) ;= 1
('b {'a 1} 2} ;= 2
2012/6/7 Alex Shabanov avshaba...@gmail.com
Oh, I see. This is because of the reader that interprets symbols from the
quoted forms in different way it does for the unquoted ones (and this
feature still strikes me as odd).
To make matters more complicated the quoted symbols seems to have some
meanings as functions for the clojure, since ('foo 1) - nil, ('foo 1 2) -
2, ('foo 1 2 3 4) - arity exception.
четверг, 7 июня 2012 г., 20:05:43 UTC+4 пользователь Bronsa написал:
you' are calling (apply 'foo '(1 2)), what you want is (apply foo '(1 2))
just call bar as
(bar (list foo 1 2))
2012/6/7 Alex Shabanov avshaba...@gmail.com
I'm curious why the following form evaluates to 2:
(defn foo [ more]
(println foo( more )))
(defn bar [v]
(apply (first v) (rest v)))
(bar '(foo 1 2))
If the form (bar '(foo 1 2)) extended to, say, (bar '(foo 1 2 3 4)) the
arity exception will be thrown.
The behavior can be reproduced after picking another names for foo
and/or bar functions.
--
You 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+unsubscribe@**googlegroups.comclojure%2bunsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/**group/clojure?hl=enhttp://groups.google.com/group/clojure?hl=en
--
You received this message because you are subscribed to the Google
Groups Clojure group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with
your first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
--
You received this message because you are subscribed to the Google
Groups Clojure group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
Re: Strange evaluation result of the quoted form on 1.3
Thanks, I missed that :)
I forgot to take into an account the short `map lookup' form.
четверг, 7 июня 2012 г., 20:28:24 UTC+4 пользователь Bronsa написал:
yes, symbols like keywords lookup themselves into the second element, or
return the third if they cannot find their value
('a {'a 1} 2) ;= 1
('b {'a 1} 2} ;= 2
2012/6/7 Alex Shabanov avshaba...@gmail.com
Oh, I see. This is because of the reader that interprets symbols from the
quoted forms in different way it does for the unquoted ones (and this
feature still strikes me as odd).
To make matters more complicated the quoted symbols seems to have some
meanings as functions for the clojure, since ('foo 1) - nil, ('foo 1 2) -
2, ('foo 1 2 3 4) - arity exception.
четверг, 7 июня 2012 г., 20:05:43 UTC+4 пользователь Bronsa написал:
you' are calling (apply 'foo '(1 2)), what you want is (apply foo '(1 2))
just call bar as
(bar (list foo 1 2))
2012/6/7 Alex Shabanov avshaba...@gmail.com
I'm curious why the following form evaluates to 2:
(defn foo [ more]
(println foo( more )))
(defn bar [v]
(apply (first v) (rest v)))
(bar '(foo 1 2))
If the form (bar '(foo 1 2)) extended to, say, (bar '(foo 1 2 3 4)) the
arity exception will be thrown.
The behavior can be reproduced after picking another names for foo
and/or bar functions.
--
You 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+unsubscribe@**googlegroups.comclojure%2bunsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/**group/clojure?hl=enhttp://groups.google.com/group/clojure?hl=en
--
You received this message because you are subscribed to the Google
Groups Clojure group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with
your first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
--
You received this message because you are subscribed to the Google
Groups Clojure group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
gen-class naming
Does anyone know how to change the my-project.core name in the OSX menubar and icon tray? I have added :jvm-opts ~(if (= (System/getProperty os.name) Mac OS X) [-Xdock:name=MyProject] [])) to my project.clj file which fixes the naming issues when I run lein run. I was having issues running my project as a standalone from lein uberjar then added a (:gen-class) to myproject.core's name space declaration which now allows me to run standalone but the menu naming is back to myproject.core. 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
Help with Macros and Matchure
Hi,
I've recently started using the matchure library for pattern matching
(https://github.com/dcolthorp/matchure).
Basically, I'd like match a number of different values and bind the
first match to a symbol. In matchure, binding to a variable can be
done like this:
(if-match [(and ?c Hi) Hi] c) ; Will return Hi
I have a map:
(def *chars* { Grace :Grace
grace :Grace
Trip :Trip
trip :Trip})
And I'd like to produce something like this:
(if-match [(or
(and ?c #Grace)
(and ?c #grace)
(and ?c #Trip)
(and ?c #trip))
Trip]
c)
From something like this:
(if-match [(match-character ?c) Trip] c)
Currently, I have the following macro:
(defmacro match-character
Creates a pattern-matching OR that binds the provided symbol
to the first matched name.
[x]
`(or
~@(map
(fn [[k _]]
`(and ~x ~(re-pattern k)))
*chars*)))
It produces the following code after macroexpand-1:
(clojure.core/or (clojure.core/and ?c #trip) (clojure.core/and ?c
#Trip) (clojure.core/and ?c #Grace) (clojure.core/and ?c
#grace))
Which is exactly what I want. However, when I use it in the context I
want, it goes too far and tries to evaluate ?c. Is there a way to
just have it splice-in the code, or would I need another macro to do
that?
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
Memory issues processing large lazy sequences
Hi I'm trying to generate a sequence which corresponds to a breadth-first search of a very wide, deep tree... and I'm hitting memory problems when I go too far along the sequence. Having asked around on the IRC channel and looked here, the number 1 cause of such problems is inadvertently holding onto the head; but I can't see where I'm doing this. The code is quite simple; here's a version which displays the problem: (def atoms '(a b c)) (defn get-ch [n] (map #(str n %) atoms)) (defn add-ch ([] (apply concat (iterate add-ch atoms))) ([n] (mapcat get-ch n))) (dorun (take 2000 (add-ch))) And here's another version (which is the one I started out with before getting help from #clojure), which displays the same issue: (def atoms '(a b c)) (defn get-children [n] (map #(str n %) atoms)) (defn add-layer ([] (add-layer atoms)) ([n] (let [child-nodes (mapcat get-children n) ] (lazy-seq (concat n (add-layer child-nodes)) (dorun (take 2000 (add-layer))) Both give me an OutOfMemoryError Java heap space. I'm running them from the REPL in Eclipse/CounterClockwise, on a Macbook Air. I'm pretty new to Clojure, so after beating my head against this for a day I'm hoping that this is something trivial I'm overlooking. I realise I could up my heap-size to make the issue less likely to occur, but the sequences I ultimately want to process are so vast I don't think this is going to help me... Any suggestions warmly welcomed. Thanks Tom -- You 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: Clojurians in Austria
Hi, I am experimenting with Clojure since more than a year in my spare time - e.g., I solved all but one of the katas in the now defunct coding-kata.org but know I still have quite a lot to learn. Thanks for founding a group. Jorge P.S. Will join the google group right now. On 30 Mai, 14:38, Jozef Wagner jozef.wag...@gmail.com wrote: Thanks for replies! I've created a group athttps://groups.google.com/forum/#!forum/clojure-at Feel free to join :) Best, Jozef On Tuesday, May 29, 2012 7:20:02 PM UTC+2, bsmith.occs wrote: I too am in Vienna. I use Clojure at work for a few small internal tools, but not in production. I'd be glad to meet some other Clojurists. // Ben On Tue, May 29, 2012 at 5:05 PM, Nuno Marques wrote: I'm in Vienna and I know a couple of more Clojure people here. I would be happy to help start a clojure group here. On May 29, 2012, at 4:40 PM, Florian Over wrote: Hi i met a nice guy (David from intermaps.com) from Vienna on EuroClojure. He mentioned that there are other Clojure-User in Vienna as well. But no UserGroup right now. Maybe you can start irc clojure-at ? Florian 2012/5/29 Jozef Wagner : Hi, Are there some Clojurians from Austria or is there an Austria Clojure group? I'm looking for a Clojure related job in Austria, and so far I haven't found any Austrian group on meetup.com nor on the google groups :( Best, Jozef -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
why String is not a collection (of Character)
Hi, So my questions is as in subject. I did a bit of research but could not find a good answer. Would appreciate an insight ... (thank you 'Andy) -- You 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
newbie clojure.zip help
Nicely formatted version of the question: https://github.com/ftravers/PublicDocumentation/blob/master/clojure-question1.md I'm not sure if it's that cool to put questions somewhere else and reference from here...it's just that the formatting there is so nice! If anyone has some nice pointers to tutorials around manipulating xml in clojure, that would be appreciated too! -- You 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: Converting project.clj to maven's pom.xml
Maybe I should write a lein plugin that generates a pom for my maven plugin - but that feels a little rude :) Mark On 21/04/12 8:46 AM, Ben Smith-Mannschott wrote: It does't configure clojure-maven-plugin, so executing 'mvn package' with the resulting pom will not produce a useful result. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: clojure.core.unify and exceptions
On Jun 6, 2012, at 5:59 PM, Kevin Livingston wrote:
I was surprised to find that clojure.core.unify returns an exception
when something does not unify rather than something like nil (false)
when they don't.
You can use core.logic's unifier:
user= (require '[clojure.core.logic :as l])
user= (l/unifier '[1 ?two 3 4] '[1 2 ?three 4])
[1 2 3 4]
user= (l/unifier '[1 ?two 3 4] '[1 2 ?three NOT-FOUR])
nil
user= (l/binding-map '[1 ?two 3 4] '[1 2 ?three 4])
{?three 3, ?two 2}
-
Brian Marick, Artisanal Labrador
Contract programming in Ruby and Clojure
Occasional consulting on Agile
www.exampler.com, www.twitter.com/marick
--
You received this message because you are subscribed to the Google
Groups Clojure group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
Re: why String is not a collection (of Character)
How would that affect Java interop? It seems like it would make Clojure strings incompatible with Java functions that take strings as arguments. On Wednesday, June 6, 2012 11:03:11 PM UTC-7, Andy C wrote: Hi, So my questions is as in subject. I did a bit of research but could not find a good answer. Would appreciate an insight ... (thank you 'Andy) -- You 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: Converting project.clj to maven's pom.xml
Doesn't lein pom do it? --- Joseph Smith j...@uwcreations.com (402)601-5443 On Jun 6, 2012, at 11:20 PM, Mark Derricutt m...@talios.com wrote: Maybe I should write a lein plugin that generates a pom for my maven plugin - but that feels a little rude :) Mark On 21/04/12 8:46 AM, Ben Smith-Mannschott wrote: It does't configure clojure-maven-plugin, so executing 'mvn package' with the resulting pom will not produce a useful result. -- You 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: Converting project.clj to maven's pom.xml
On Thu, Jun 7, 2012 at 2:52 PM, Joseph Smith j...@uwcreations.com wrote: Doesn't lein pom do it? Not yet, but it's planned: https://github.com/technomancy/leiningen/pull/454 Happy to take a patch for it. -Phil -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: why String is not a collection (of Character)
On 7 June 2012 07:03, Andy Coolware andy.coolw...@gmail.com wrote: So my questions is as in subject. I did a bit of research but could not find a good answer. Because otherwise Clojure wouldn't be compatible with Java APIs. It would also probably be slower than using the native String class. - James -- You 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: newbie clojure.zip help
Found the answer and made a tutorial out of it...feel free to enjoy it: https://github.com/ftravers/PublicDocumentation/blob/master/clojure-read-xml.md On Jun 6, 3:56 pm, fenton fenton.trav...@gmail.com wrote: Nicely formatted version of the question:https://github.com/ftravers/PublicDocumentation/blob/master/clojure-q... I'm not sure if it's that cool to put questions somewhere else and reference from here...it's just that the formatting there is so nice! If anyone has some nice pointers to tutorials around manipulating xml in clojure, that would be appreciated too! -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: why String is not a collection (of Character)
I was wondering cause we can do all awesome stuff like that: user= (last abc) \c user= (first abc) \a user= (map (fn[z] (str z -)) abc) (a- b- c-) but this renders false user= (coll? abc) false A. -- You 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: Memory issues processing large lazy sequences
The first version completes without problems. Make sure your JVM has plenty of memory available to garbage collect. Look at the -Xmx setting (for instance with leiningen :jvm-opts [- Xmx2g -server]) REPL started; server listening on localhost port 18885 user= (def atoms '(a b c)) #'user/atoms user= user= (defn get-ch [n] (map #(str n %) atoms)) #'user/get-ch user= (defn add-ch ([] (apply concat (iterate add-ch atoms))) ([n] (mapcat get-ch n))) #'user/add-ch user= (time (dorun (take 2000 (add-ch Elapsed time: 89922.105 msecs nil user= On Jun 7, 10:53 am, Tom Hume twh...@gmail.com wrote: Hi I'm trying to generate a sequence which corresponds to a breadth-first search of a very wide, deep tree... and I'm hitting memory problems when I go too far along the sequence. Having asked around on the IRC channel and looked here, the number 1 cause of such problems is inadvertently holding onto the head; but I can't see where I'm doing this. The code is quite simple; here's a version which displays the problem: (def atoms '(a b c)) (defn get-ch [n] (map #(str n %) atoms)) (defn add-ch ([] (apply concat (iterate add-ch atoms))) ([n] (mapcat get-ch n))) (dorun (take 2000 (add-ch))) And here's another version (which is the one I started out with before getting help from #clojure), which displays the same issue: (def atoms '(a b c)) (defn get-children [n] (map #(str n %) atoms)) (defn add-layer ([] (add-layer atoms)) ([n] (let [child-nodes (mapcat get-children n) ] (lazy-seq (concat n (add-layer child-nodes)) (dorun (take 2000 (add-layer))) Both give me an OutOfMemoryError Java heap space. I'm running them from the REPL in Eclipse/CounterClockwise, on a Macbook Air. I'm pretty new to Clojure, so after beating my head against this for a day I'm hoping that this is something trivial I'm overlooking. I realise I could up my heap-size to make the issue less likely to occur, but the sequences I ultimately want to process are so vast I don't think this is going to help me... Any suggestions warmly welcomed. Thanks Tom -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: why String is not a collection (of Character)
Hi Andy, Many collection functions call seq on their arguments, therefore those expect a Seqable (or a String, Iterable, Array, java.util.Map etc.), not an IPersistentCollection (which coll? tests for). Working these things out can get subtle. Thanks, Ambrose On Fri, Jun 8, 2012 at 7:54 AM, Andy Coolware andy.coolw...@gmail.comwrote: I was wondering cause we can do all awesome stuff like that: user= (last abc) \c user= (first abc) \a user= (map (fn[z] (str z -)) abc) (a- b- c-) but this renders false user= (coll? abc) false A. -- You 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: why String is not a collection (of Character)
Hi Andy, On Thu, Jun 7, 2012 at 7:54 PM, Andy Coolware andy.coolw...@gmail.com wrote: I was wondering cause we can do all awesome stuff like that: user= (last abc) \c user= (first abc) \a user= (map (fn[z] (str z -)) abc) (a- b- c-) but this renders false user= (coll? abc) false Few thoughts: 1. You're using a type test there. I'd check out the Collections section of the cheatsheet: http://clojure.org/cheatsheet 2. While I would very much expect the type test (coll? seq?) to return false on a string, I would _not_ expect the capability test (sequential?) to return false, and it does for a String. Is this the expected behavior? I would think that any seqable would return true for sequential?. What do we think? Then, at least, you could easily write code that expects to process only seqable things with a simple pre-condition that the argument is sequential?. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: why String is not a collection (of Character)
Hi Tim,
On Fri, Jun 8, 2012 at 12:11 PM, Tim Visher tim.vis...@gmail.com wrote:
2. While I would very much expect the type test (coll? seq?) to return
false on a string, I would _not_ expect the capability test
(sequential?) to return false, and it does for a String. Is this the
expected behavior? I would think that any seqable would return true
for sequential?. What do we think?
sequential? is a type predicate also. This probably works as expected in
CLJS
using protocols.
Every Seqable is not Sequential.
(sequential? {:a 1}) = false
Thanks,
Ambrose
--
You received this message because you are subscribed to the Google
Groups Clojure group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
Re: why String is not a collection (of Character)
On 06/07/2012 09:22 PM, Ambrose Bonnaire-Sergeant wrote:
Every Seqable is not Sequential.
(sequential? {:a 1}) = false
Is there a simple test for sequable?
--
You 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
