There is meta data on var's which you need to use (meta (var sym)) to
get at, but I'm under the impression that the var metadata is mostly
for the benefit of the language runtime and a few core functions (like
doc).
The regular use of metadata I think is when you add it yourself to
symbols or coll
On 03.03.2009, at 01:01, Stephen C. Gilardi wrote:
> The seq function is not able to provide a seq on either an
> Enumeration or an Iterator.
>
> clojure.core provides enumeration-seq and iterator-seq to create
> seqs on them.
Yesterday I added a generic anything-to-seq multimethod to
cloj
On 03.03.2009, at 00:53, Laurent PETIT wrote:
> I'm able to do that from the REPL when done one by one :
> (clojure.core/ns-unmap *ns* (quote filter))
> (clojure.core/defn filter [] "oh my!")
>
> thus correctly redefining the binding of filter for the rest of use
> by the ns
>
> But I can't man
On Mar 2, 10:41 pm, Jeffrey Straszheim
wrote:
> First off, Clojure is not Common Lisp (to say the least), so I don't think
> we necessarily need to create as stateful a library as the original Cells.
> I've used Cells-like architectures before in GUI apps (although not as a
> separate abstract
On Mar 2, 3:36 pm, Christophe Grand wrote:
>
> You can access the latest exception through the var *e.
> eg (.printStackTrace *e) will print the whole stack trace.
>
> Worth looking is also clojure.contrib.stacktrace that tries to make Java
> stack traces more readable.
Thanks, that looks very h
There are a lot of "toy" cells implementations for Clojure, but as far as I
can tell none of them are really full-production ready libraries like K.
Tilton's. I'm planning on starting a GUI based project and something cell's
like would be very helpful. I may end up building it myself, and am
wond
> At the end of the Vectors section I say this:
> "All the code examples provided above for lists also work for vectors."
>
> Do you think I should provide more detail than that?
I missed that sentence. I think it's helpful to know that some
functions return a list type when given a vector, o
On Mon, Mar 2, 2009 at 7:05 PM, Chouser wrote:
>
> On Mon, Mar 2, 2009 at 7:53 PM, Mark Volkmann
> wrote:
>>
>> Currently what the article says about Vectors is "They are ideal when
>> items need to be retrieved by index, but not efficient when new items
>> need to be added or removed quickly."
On Mon, Mar 2, 2009 at 7:53 PM, Mark Volkmann wrote:
>
> Currently what the article says about Vectors is "They are ideal when
> items need to be retrieved by index, but not efficient when new items
> need to be added or removed quickly." It doesn't distinguish between
> the working in the middle
On Mon, Mar 2, 2009 at 5:42 PM, Rich Hickey wrote:
>
> On Mar 2, 3:37 pm, Mark Volkmann wrote:
>> On Mon, Mar 2, 2009 at 2:11 PM, MikeM wrote:
>>
>> > I read the part of your article (on lists and vectors) that you linked
>> > to in another thread -
>>
>> > In the list section you show the func
That makes sense now. Thanks for the link to the thread.
On Mon, Mar 2, 2009 at 5:01 PM, Stephen C. Gilardi wrote:
>
> On Mar 2, 2009, at 6:37 PM, Brian Doyle wrote:
>
> I had the same issue and ended up having to use enumeration-seq function.
>> Seems
>> strange but it worked.
>>
>
> The seq
On Mar 2, 2009, at 6:37 PM, Brian Doyle wrote:
I had the same issue and ended up having to use enumeration-seq
function. Seems
strange but it worked.
The seq function is not able to provide a seq on either an Enumeration
or an Iterator.
clojure.core provides enumeration-seq and iterato
Konrad,
I'm able to do that from the REPL when done one by one :
(clojure.core/ns-unmap *ns* (quote filter))
(clojure.core/defn filter [] "oh my!")
thus correctly redefining the binding of filter for the rest of use by the
ns
But I can't manage to get it work from a macro (indeed not even when
d
On Mar 2, 3:37 pm, Mark Volkmann wrote:
> On Mon, Mar 2, 2009 at 2:11 PM, MikeM wrote:
>
> > I read the part of your article (on lists and vectors) that you linked
> > to in another thread -
>
> > In the list section you show the function into and conj as applied to
> > lists, but these can al
I had the same issue and ended up having to use enumeration-seq function.
Seems
strange but it worked.
On Mon, Mar 2, 2009 at 4:22 PM, Mark Volkmann wrote:
>
> Should I be able to do something like this?
>
> (doseq [table-column (-> jtable .getColumnModel .getColumns)]
>
> javax.swing.JTable has
Should I be able to do something like this?
(doseq [table-column (-> jtable .getColumnModel .getColumns)]
javax.swing.JTable has a getColumnModel method that returns a TableColumnModel.
TableColumnModel has a getColumns method that returns Enumeration.
I was hoping that would automatically be tr
Amit, Is it possible to configure a video conference for the next
clojure meeting?
On Mar 1, 12:21 pm, Amit Rathore wrote:
> Are any of the folks on this thread in/around the bay area? (I know
> Nabib is).
> We're having a clojure user-group meeting on the 12th of March - and
> the clojure/terra
On 02/03/2009, at 7:23 PM, Konrad Hinsen wrote:
> For namespaces other than clojure.core, an acceptable solution is to
> use the :only keyword in the :use clause of the ns macro. This just
> requires a bit more work in typing, but I don't see any other
> potential difficulty. I am currently conv
On Mar 2, 1:50 pm, Frantisek Sodomka wrote:
> Hmm, interesting error. After the merge of the lazy branch was
> everything ok, so it has to be a recent change.
>
> user=> (eval (list + 1 2 3))
> java.lang.ExceptionInInitializerError (NO_SOURCE_FILE:0)
> user=> (eval '(+ 1 2 3))
> 6
>
> user=> (l
There's also "includes?" in clojure.contrib.seq-utils.
-Jason
On Mar 2, 6:07 am, David Sletten wrote:
> On Mar 2, 2009, at 4:01 AM, Mark Volkmann wrote:
>
>
>
> > It's verbose in order to discourage its use since its a linear search.
> > See the discussion about the contains? function at
> >htt
On Sun, Mar 1, 2009 at 7:22 PM, Rayne wrote:
>
> I've been wishing I had one for a while now, to replace my Haskell
> wallpaper ;). Me and blbrown were talking in #Clojure and he suggested
> I make this post requesting that if anyone here has skill in image
> editing they could make a Clojure wal
On Mar 2, 2009, at 2:52 AM, Zededarian wrote:
>
> Ah, I see. Out of curiosity, is there some design reason why clojure
> doesn't reduce my original function to the apply version? I mean,
> take the function:
> (loop [x '(1 2 3) fin '()]
> (if x
>(recur (cdr x) (concat fin (list x)))
>
On Mon, Mar 2, 2009 at 2:11 PM, MikeM wrote:
>
> I read the part of your article (on lists and vectors) that you linked
> to in another thread -
>
> In the list section you show the function into and conj as applied to
> lists, but these can also be applied to vectors and will return
> vectors,
>
I read the part of your article (on lists and vectors) that you linked
to in another thread -
In the list section you show the function into and conj as applied to
lists, but these can also be applied to vectors and will return
vectors,
(into [1 2 3] [4 5]) => [1 2 3 4 5]
(conj [1 2 3] 4 5) => [
> I felt the same way at first. I think it would help if the group
> shared some common, non-mathematical cases, where laziness is helpful.
I've been using multiple resultset-seq to collect together matching
data from different databases and stream it on through some existing
Java code. It is fa
On 02.03.2009, at 18:48, Matthew D. Swank wrote:
> Why is it necessary to pass a dummy result in the conditional code:
>
> (if (identical? bform :when)
> (list 'm-bind `(if ~expr (~'m-result ::any) ~'m-zero)
> (list 'fn ['_] mexpr))
>...
> Why not:
>
> (if (identic
Hmm, interesting error. After the merge of the lazy branch was
everything ok, so it has to be a recent change.
user=> (eval (list + 1 2 3))
java.lang.ExceptionInInitializerError (NO_SOURCE_FILE:0)
user=> (eval '(+ 1 2 3))
6
user=> (list + 1 2 3)
(# 1 2 3)
user=> '(+ 1 2 3)
(+ 1 2 3)
Frantisek
In August, I was also struggling with laziness. As I went along my
learning curve,
I realized that much of this fog in my mind came up because I was still
taking mutability of data and side effects as "normal" by habit.
I had not "spliced" my thoughts while toggling between Java and Clojure,
someth
On Sun, Mar 1, 2009 at 11:25 AM, Kearsley Schieder-Wethy
wrote:
>
> However, I'll freely admit that I'm a Java newbie. I get the basic
> gist of the language, but find myself stalling when it comes to
> finding methods and fields on an object. One thing that I found
> myself missing, deeply, wa
in clojure.contrib.monad expressions handling conditions in the monad
comprehension are generated by:
(defn- add-monad-step
"Add a monad comprehension step before the already transformed
monad comprehension expression mexpr."
[mexpr step]
(let [[bform expr] step]
(if (identical? bform
On Mar 2, 2009, at 18:35, srolls wrote:
> I think :exclude is what you want
>
> (ns my-ns
> (:refer-clojure :exclude [get replace]))
Not quite, as exclude requires me to know what I want exclude.
What I want is "exclude everything that wasn't there in version X.Y".
Konrad.
--~--~-~-
On Mon, Mar 2, 2009 at 12:53 AM, Konrad Hinsen wrote:
>
> Over the last weeks, two additions to clojure.core broke several of
> my library modules by introducing names into the clojure.core
> namespace that I was using in my libraries as well. While this kind
> of problem is acceptable in a pre-re
On Mar 2, 3:29 am, Mark Volkmann wrote:
> On Sun, Mar 1, 2009 at 11:06 PM, max3000 wrote:
>
> > Hi,
>
> > I find the laziness in clojure very hard to wrap my head around. I
> > understand the idea and it's probably nice in theory. However, in real
> > life it doesn't seem really useful beyond ha
A test like this in clojure.contrib.test-clojure.evaluation is
currently failing:
user=> (eval (list + 1 2 3))
java.lang.ExceptionInInitializerError (NO_SOURCE_FILE:0)
--Steve
smime.p7s
Description: S/MIME cryptographic signature
Article is a great introduction and reference to clojure.
It could serve as _the_ documentation, maybe even distributed with
clojure itself.
I like the fact that it has "right" code to txt ratio.
The only things missing is better organization (chapters hierarchy)
and syntax highlight of code.
Tha
On Mar 2, 3:04 pm, Michael Wood wrote:
> I don't think David is having trouble finding the documentation for
> meta. He's complaining that the output of (doc meta) does not tell
> you that you need to use (meta (var meta)) instead of (meta 'meta) or
> (meta meta).
Something like that, yes. Now
On Mar 2, 2:34 pm, Anand Patil
wrote:
> On Mar 2, 12:48 pm, Rich Hickey wrote:
> > On Mar 2, 2009, at 5:15 AM, Anand Patil wrote:
> > > On Mar 1, 10:58 pm, Rich Hickey wrote:
> > > If you'll bear with me a bit longer- what if I set breadth=1000 and
> > > depth=1000 in the program above. The thr
On Mar 2, 12:48 pm, Rich Hickey wrote:
> On Mar 2, 2009, at 5:15 AM, Anand Patil wrote:
>
>
> > On Mar 1, 10:58 pm, Rich Hickey wrote:
> >> On Mar 1, 2009, at 1:53 PM, Anand Patil wrote:
> >> I've made futures use the Agents' CachedThreadPool, which should
> >> prevent the thread pool exhausti
On Mar 2, 2009, at 4:01 AM, Mark Volkmann wrote:
>
> It's verbose in order to discourage its use since its a linear search.
> See the discussion about the contains? function at
> http://www.ociweb.com/mark/clojure/article.html#Lists
> and http://www.ociweb.com/mark/clojure/article.html#Sets.
Ah
Hi Tom
On Mon, Mar 2, 2009 at 3:13 PM, Tom Ayerst wrote:
> Hi David,
>
> I think part of the problem is that you missed the name space from the data
> you retrived with find-doc. meta isn't in the user namespace so you need to
> specify it.
I don't think David is having trouble finding the doc
On Mon, Mar 2, 2009 at 6:54 AM, David Sletten wrote:
>
> Does Clojure have an analog of Lisp's MEMBER function?
> (member 'a '(c a f e b a b e)) => (A F E B A B E)
>
> (I'm more interested in it's use as a predicate rather than the fact
> that it returns a sublist when true.)
>
> "find" and "cont
On Mar 2, 2009, at 3:39 AM, Meikel Brandmeyer wrote:
>
>> Does Clojure have an analog of Lisp's MEMBER function?
>> (member 'a '(c a f e b a b e)) => (A F E B A B E)
>
> I don't know the member function of CL, but I interpret
> your example, that it cuts away the head of the list until
> the firs
Hi David,
Am 02.03.2009 um 13:54 schrieb David Sletten:
Does Clojure have an analog of Lisp's MEMBER function?
(member 'a '(c a f e b a b e)) => (A F E B A B E)
I don't know the member function of CL, but I interpret
your example, that it cuts away the head of the list until
the first occuren
Hi David,
I think part of the problem is that you missed the name space from the data
you retrived with find-doc. meta isn't in the user namespace so you need to
specify it.
user=> (find-doc "metadata")
...
-
*clojure.core/*meta
([obj])
Returns the metadata of obj, retu
Does Clojure have an analog of Lisp's MEMBER function?
(member 'a '(c a f e b a b e)) => (A F E B A B E)
(I'm more interested in it's use as a predicate rather than the fact
that it returns a sublist when true.)
"find" and "contains?" are listed under the Maps section of the data
structures
On Mar 2, 2009, at 5:15 AM, Anand Patil wrote:
>
>
>
> On Mar 1, 10:58 pm, Rich Hickey wrote:
>> On Mar 1, 2009, at 1:53 PM, Anand Patil wrote:
>> I've made futures use the Agents' CachedThreadPool, which should
>> prevent the thread pool exhaustion (svn 1316). You shouldn't worry
>> about the
On Mar 2, 12:37 pm, Mark Volkmann wrote:
> Are you saying that you wanted the metadata of the meta function?
No, I just used it to illustrate that the Clojure documentation is not
as well organized and intuitive as some would have us believe.
Regards,
David
--~--~-~--~~
On Mon, Mar 2, 2009 at 4:22 AM, David wrote:
>
> Thanks for the link, Mark. I'll look into the contents.
>
> What I'm talking about, though, is not that there is no documentation,
> but rather I can't find my way around it very well. I only get around
> to Clojure every so often and I find I forg
On Sun, Mar 1, 2009 at 11:06 PM, max3000 wrote:
>
> Hi,
>
> I find the laziness in clojure very hard to wrap my head around. I
> understand the idea and it's probably nice in theory. However, in real
> life it doesn't seem really useful beyond hardcore mathematical
> problems.
I felt the same wa
now i've found an interesting article that describes macros in more
details http://www.ociweb.com/mark/clojure/article.html#Macros
On 2 Mar, 10:27, linh wrote:
> hello,
> there are lots of good examples of clojure macros on the web, but i
> miss a more detailed explanation.
> for example what do
Ah, I see. Out of curiosity, is there some design reason why clojure
doesn't reduce my original function to the apply version? I mean,
take the function:
(loop [x '(1 2 3) fin '()]
(if x
(recur (cdr x) (concat fin (list x)))
fin))
Will, at least if I'm interpreting your responses corre
Hello,
Martin DeMello a écrit :
> Playing with readFileToByteArray in the repl:
>
> user=> (import '(org.apache.commons.io FileUtils))
> nil
>
> user=> (def dawg (FileUtils/readFileToByteArray "words.dawg"))
> java.lang.ClassCastException (NO_SOURCE_FILE:10)
>
> user=> (FileUtils/readFileToByteAr
Thanks for the link, Mark. I'll look into the contents.
What I'm talking about, though, is not that there is no documentation,
but rather I can't find my way around it very well. I only get around
to Clojure every so often and I find I forget a lot, so I'd have to go
through practically all the d
On Mar 1, 10:58 pm, Rich Hickey wrote:
> On Mar 1, 2009, at 1:53 PM, Anand Patil wrote:
> I've made futures use the Agents' CachedThreadPool, which should
> prevent the thread pool exhaustion (svn 1316). You shouldn't worry
> about the expense of the threads, that's why there's a pool.
>
>
On Mar 2, 1:16 am, MikeM wrote:
> Not sure if I understand what you need, but could you build on the
> existing capability to send to the current agent: (send *agent* ...) ?
> You could have the agent send to itself, then exit the function with
> some work left to do that would be restarted on th
Hi,
Am 02.03.2009 um 06:06 schrieb max3000:
Here is the code that gave me trouble:
(map #(add-watch % watcher callback-fn) all-agents)
This was not executing. I had to change it to the below expression:
(doseq [agent all-labor-agents]
(add-watch agent total-labor-agent callback-fn
hello,
there are lots of good examples of clojure macros on the web, but i
miss a more detailed explanation.
for example what do all these special characters used inside macros
really mean ` ' @ ~ # ~...@.
anyone know if there's a tutorial for clojure macros (not lisp)?
macros are very exotic for
Over the last weeks, two additions to clojure.core broke several of
my library modules by introducing names into the clojure.core
namespace that I was using in my libraries as well. While this kind
of problem is acceptable in a pre-release development period, I don't
expect it to go away w
On 02.03.2009, at 01:50, Rich Hickey wrote:
> I was wondering if you considered using maps or struct-maps for this.
> One of my pet peeves with algebraic data types is the unnamed,
> positional nature of the components/fields. It always bothers me you
> have to rename the fields in every pattern
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