Is it safe to alter an atom while iterating that atom's value? It seems
to work as I would expect, but am I just getting lucky (and are there
concurrency issues)?
user=> (let [a (atom #{1 2 3 4 5})]
(doseq [x @a] (prn @a) (swap! a disj x)))
#{1 2 3 4 5}
#{2 3 4 5}
#{3 4 5}
#{4 5}
#{5}
On 7/11/10 8:43 AM, James Reeves wrote:
On 11 July 2010 12:38, Jeffrey Schwab wrote:
Is it safe to alter an atom while iterating that atom's value?
user=> (let [a (atom #{1 2 3 4 5})]
(doseq [x @a] (prn @a) (swap! a disj x)))
Whenever you deref an atom (using @)
On 7/11/10 9:52 AM, Stuart Halloway wrote:
Thanks. What I'm having trouble with is not the reference vs. value semantics, but the order of evaluation.
Clojure seems to be all over the map on this; it's probably not as bad as it looks, but I'm accustomed to
either purely strict or purely lazy
On 7/11/10 9:08 PM, Michał Marczyk wrote:
On 12 July 2010 02:37, Jeffrey Schwab wrote:
I did not know whether the sequence expressions (the right halves of the
binding-forms) were evaluated strictly, or re-evaluated on each pass (like
the body-expr). They are apparently evaluated a priori
Is Clojure 1.2 Beta 1 built from the current clojure.git head on github?
I don't see any 1.2 branches or tags, and the repl prints the following:
Clojure 1.2.0-master-SNAPSHOT
I also don't see any commits since 6/23; is that right?
Thanks and congratulations, btw. :)
On 7/14/10 11:35 AM, St
On 7/15/10 9:24 AM, nickikt wrote:
the new branch is called clojure not master
Thanks, but I see no branch by that name. Do you mean 1.2.x? (And
what's the corresponding branch for clojure-contrib?)
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On 7/15/10 10:15 AM, Adrian Cuthbertson wrote:
Apparently there's a problem with git clone http://...
Should be git clone git://github.com/clojure/clojure.git
Sorry for the noise.
Thanks, I've been mistakenly working from
git://github.com/richhickey/clojure.git
...which is apparently why
On 7/16/10 2:42 PM, Cyrus Harmon wrote:
Going to http:// clojure.org, searching for git and following the "Clojure goes
git" link would lead one to
http://groups.google.com/group/clojure/msg/ca4fb58428052554 which suggests that the
rickhickey page is the right one. Where's the announcement abo
On 7/17/10 5:50 AM, Meikel Brandmeyer wrote:
On 7/16/10 2:42 PM, Cyrus Harmon wrote:
Going to http:// clojure.org, searching for git and following the "Clojure goes
git" link would lead one to
http://groups.google.com/group/clojure/msg/ca4fb58428052554 which suggests that the
rickhickey pag
On 7/17/10 4:43 PM, Isaac Hodes wrote:
Apologies in advance if this is somewhat OT in a Clojure group.
double convolve(double *xs, double *is, double *ys){
int i,j;
for(i=0; i
How are you getting the size of the collections from the pointers, and
why are you checking the lengths on ever
Not so. Windows commands of the form "someProgram /some/path" often mistake
/some/path for command-line switches (like Unix flags). I had real-world
problems with this when trying to run a Rails app on Windows, because of the
issue discussed here: http://www.ruby-forum.com/topic/50137
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On Tuesday, April 12, 2011 9:25:25 AM UTC-4, rob wrote:
>
> One Scheme advocate I know has that suggested that it would be more
> hygienic to have gensyms be the rule instead of the exception to the rule
> (you could still get capture by asking to *not* gensym). I'm not certain I
> agree with
On Thursday, April 14, 2011 8:51:47 PM UTC-4, Andreas Kostler wrote:
>
> (reduce + (map :b p))
; Or, save one character:
(apply + (map :b p))
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On Wednesday, April 20, 2011 1:28:38 PM UTC-4, Mike Meyer wrote:
>
> On Wed, 20 Apr 2011 10:16:05 -0700 (PDT)
> David Jacobs wrote:
>
> > What's the status on this? One of the reasons I don't use Clojure
> everyday,
> > much as I like it, is that I want it to integrate seamlessly with Unix
>
How would you correct it in thread-safe manner? AFAIK, the JVM's notion of
"current working directory" is a single, global value. There are other
subtle issues, as well, e.g., anybody who can connect to your nailgun server
can cause arbitrary code to be executed in your name. One of the more
Boo. Keep the paywall. Don't make me look at ads. And for the record,
you're not paying for information, but rather to have the information
presented in a particular way.
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On Tuesday, May 3, 2011 3:20:25 PM UTC-4, David Nolen wrote:
>
> On Tue, May 3, 2011 at 2:51 PM, Ken Wesson wrote:
>
>> It's optimizing your loop away, or else you're using ridiculously
>> powerful hardware.
>>
>> user=> (time (dotimes [_ 100] (Math/ceil (rand
>> "Elapsed time: 142.86748
On Tuesday, May 3, 2011 3:31:33 PM UTC-4, tbc++ wrote:
>
>
> On Tue, May 3, 2011 at 2:28 PM, Jeffrey Schwab wrote:
>
>> Boo. Keep the paywall. Don't make me look at ads. And for the record,
>> you're not paying for information, but rather to have the informa
Is there any way to make the Clojure repl pretty-print by default?
I have a bunch of little functions that return things like directory
listings and git output, mostly as seqs of lines or Files. I could
change the functions to pretty-print (rather than return) their
results, but I often want to p
Thank you! That is exactly what I needed.
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I tried adding (clojure.main/repl :print pprint) to my user.clj, but clojure
then reports an error, because clojure.main/repl does not (yet) exist. Is
there any work-around for this? Maybe a way to register onLoad style hooks
that will be executed once the repl is running? Here's my current
Thank!
Why -r? The (clojure.main/repl) call seems to start a new repl. (In fact,
it took me a minute to figure out that this really needs to be the last
thing in repl-init.clj.)
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What does eval'ing a form containing an object reference cause an
exception? What am I doing wrong?
user=> (eval [(java.util.Date.)])
java.lang.RuntimeException: Can't embed object in code, maybe print-dup not
defined: Fri Mar 11 19:33:04 EST 2011 (NO_SOURCE_FILE:153)
This is the simplest exam
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