first that dinamic languages are better for developers, but you loose some
performance compared to typed languages.. and jvm was created with types in
mind.. so right now clojure data structures are implemented in java and
typed, when you get it in the clojure runtime its boxed already.
theres
far as i know..actors share a mutable queue.. so there's good possibility
for dead-locks
for scala theres an akka framework , that you can solve that with its actors
.. that let me see.. uses a STM..
and its actors are pretty the same as .. clojures agents
i think clojure are making disciples in
i think MIT - church http://projects.csail.mit.edu/church/wiki/Church
http://projects.csail.mit.edu/church/wiki/Churchwould be a good candidate
AI lib for porting to clojure
On Sat, May 15, 2010 at 5:02 PM, Miki miki.teb...@gmail.com wrote:
You can use Weka (java).
On May 14, 10:56 pm,
Hi.
Congomongo is a fairly thin wrapper around the MongoDB java driver.
All fetch requests are proxied through the driver which handles all
opening and closing of connections automatically.
Its main utility is providing a smooth(er) interface between Clojure's
immutable types and the mutable
On 17 mei, 08:48, Fabio Kaminski fabiokamin...@gmail.com wrote:
first that dinamic languages are better for developers, but you loose some
performance compared to typed languages.. and jvm was created with types in
mind.. so right now clojure data structures are implemented in java and
Yes,
as David wrote,
What you're describing is not single-dispatch-based polymorphism (e.g.
like in java), it's double dispatch (because you want to dispatch to
the implementation of the protocol function based on both the type and
another parameter which may be totally dynamic, or materialized
Hi all,
I ran a clojure dojo last week in Dundee, Scotland and thought we'd be
able to start on a simple group project making use of a couple of
libraries. I figured the most idiomatic approach to this would be to
adopt leiningen, but it appears that Enclojure (used by the majority
of the group
far as i know..actors share a mutable queue.. so there's good possibility
for dead-locks
Actors as they work in erlang don't have mutable state (not
intrinsically anyway, though of course you can implement an actor that
does poke on shared data since it's your code). The 'state' in an
erlang
Having a web-based zero-deployment-effort REPL is pretty nifty,
especially for newcomers. Thanks Rayne/Heinz/etc.!
Already found a small bug: HTML entities are apparently quoted twice
and appear in the output.
Clojure blah
quot;blahquot;
Clojure filter
#lt;core$filter__5084
On May 15, 2010, at 4:56 PM, islon wrote:
I'm working in a simple single-thread console-based rpg game in
clojure (a port from my own scala version)
and didn't want to use any concurrency structure because the game is
single threaded.
I was thinking about a macro like
(defmacro set!! [s
Clojurize just got added to my custom dictionary :)
You'll want to use the standard . syntax for creating a new object.
You wrote this
(new TwitterStreamFactory)
It's standard to write
(TwitterStreamFactory. )
So your form would look like this:
(.getInstance (TwitterStreamFactory. )
On 17 май, 12:07, Laurent PETIT laurent.pe...@gmail.com wrote:
Yes,
as David wrote,
What you're describing is not single-dispatch-based polymorphism (e.g.
like in java), it's double dispatch (because you want to dispatch to
the implementation of the protocol function based on both the type
It appears the (:key map) style is more common than (map :key) among
Clojurians. Is this true?
So far I'm doing (map :key) because it's more familiar, and because it doesn't
make me change styles when using something besides keywords as keys (admittedly
rare so far). But I'd like to hear other
You'll notice 90% of the I'm having trouble with Emacs posts have
one thing in common: they all start with I'm trying to install
without ELPA.
I have this exact problem, and I have installed everything using ELPA.
clojure-mode 1.7.1
slime 20100404
slime-repl 20100404
swank-clojure 1.1.0
I don't know if it's more common or not, but I tend to use (:key map) most
of the time, because it's a visual cue that I'm getting some key from a
map. Whenever you see (:key something), you know that you're getting the
:key field from something. When you see (something :key), you have to be
2010/5/17 Mikhail Kryshen mikh...@kryshen.net:
On 17 май, 12:07, Laurent PETIT laurent.pe...@gmail.com wrote:
Yes,
as David wrote,
What you're describing is not single-dispatch-based polymorphism (e.g.
like in java), it's double dispatch (because you want to dispatch to
the implementation
Hi,
is it correct to assume that the usual read-syntax for 1.2 will be ^
instead of #^? Will all printers emit that? Will #^ become
deprecated?
Unfortunately I didn't find a enlightening ticket on assembla and no
information on the devel list, just the commit message (^ does what
#^ does,
Guys,
I have a hybrid Java/Clojure project.
I'm finding myself moving more and more of the concurrent code from
Java to Clojure - because it is so much simpler to code in Clojure
:-)...
... but I am also finding that I have a recurring problem for which
Clojure only seems to have a partial
Hi,
On Mon, May 17, 2010 at 08:21:39AM -0700, Stefan Kamphausen wrote:
is it correct to assume that the usual read-syntax for 1.2 will be ^
instead of #^? Will all printers emit that? Will #^ become
deprecated?
No. They are not equivalent and ^ is deprecated. #^ will remain doing
what it
Hi,
On Mon, May 17, 2010 at 08:49:35AM -0700, Jules wrote:
The problem occurs in stateful objects when you receive an input and
need to both modify your state and generate and deliver some output.
I store my internal state in an atom and use swap! to update it,
passing in the input and a
If you are not concerned about coordination, then why not just grab
the value beforehand and use compare-and-set:
(let [old @my-atom
new (my-fn arg)]
(compare-and-set! my-atom old new)
(do-stuff old new))
On the other hand, if you are concerned about coordination between
multiple
2010/5/17 Meikel Brandmeyer m...@kotka.de:
Hi,
On Mon, May 17, 2010 at 08:21:39AM -0700, Stefan Kamphausen wrote:
is it correct to assume that the usual read-syntax for 1.2 will be ^
instead of #^? Will all printers emit that? Will #^ become
deprecated?
No. They are not equivalent and ^
Not quite.
Syntax Before:
meta: ^
type-hint: #^
Syntax After:
meta: none, use meta
type-hint: ^
It's already in place on 1.2:
user= (set! *warn-on-reflection* true)
true
user= (defn foo [x] (.longValue x))
Reflection warning, NO_SOURCE_PATH:6 - reference to field longValue
can't be resolved.
Thanks for your replies - Meikel and Alex,
I considered using refs, but perhaps wrongly, came to the conclusion
that they were for coordinating multiple changes atomically within an
STM ? I figured that I only had one shared piece of state - current-
state (input and output are both effectively
Thanks for the answers.
I realized the macro wasn't a good idea and I will keep using atoms to
manage state, just found the reset! function =)
Islon
On May 17, 10:28 am, Michael Gardner gardne...@gmail.com wrote:
On May 15, 2010, at 4:56 PM, islon wrote:
I'm working in a simple single-thread
Hi,
On Mon, May 17, 2010 at 09:18:15AM -0700, ataggart wrote:
Not quite.
Wow. I'm really disconnected from 1.2. :( Please ignore me concerning
1.2 questions.
Sincerely
Meikel
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To post to this group,
You could create a local instance of clojure.lang.MultiFn in a let
binding, and access it directly. You can see the definition of the
object here:
http://github.com/richhickey/clojure/blob/master/src/jvm/clojure/lang/MultiFn.java
The very good reason you DO NOT DO THIS is that this object is
Salut,
On 17 Mai, 18:12, Laurent PETIT laurent.pe...@gmail.com wrote:
2010/5/17 Meikel Brandmeyer m...@kotka.de:
Hi,
On Mon, May 17, 2010 at 08:21:39AM -0700, Stefan Kamphausen wrote:
is it correct to assume that the usual read-syntax for 1.2 will be ^
instead of #^? Will all
Hi Steven,
I recently put together a propagator/cell system using Clojure's
actors/watchers. The code for implementing a concurrent propagator
system actually came out to a little less than a single page. Take a
look at the following for the full implementation.
http://gist.github.com/403987
On 17 mei, 19:25, Eric Schulte schulte.e...@gmail.com wrote:
Hi Steven,
I recently put together a propagator/cell system using Clojure's
actors/watchers. The code for implementing a concurrent propagator
system actually came out to a little less than a single page. Take a
look at the
If get-in is to be consistent with get, it better allow to specify a
default value:
(get-in nested-structure [k1 k2 ... kN] :default something)
-- would it make sense to add that to the standard get-in?
Cheers,
Alexy
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2010/5/17 Stefan Kamphausen ska2...@googlemail.com:
Salut,
On 17 Mai, 18:12, Laurent PETIT laurent.pe...@gmail.com wrote:
2010/5/17 Meikel Brandmeyer m...@kotka.de:
Hi,
On Mon, May 17, 2010 at 08:21:39AM -0700, Stefan Kamphausen wrote:
is it correct to assume that the usual
Hi,
I reset *out* in a test program, and it worked fine. But when I try to
do the same with *err*, I found no change, still. All Errors I
produced seem to go directly to Java's System.err, not using my new
*err*.
Can anybody point me to a situation, when *err* is used?
Thank you, and kind
+1.
I'd also like to see a default value in select-keys.
On Mon, May 17, 2010 at 3:34 PM, braver delivera...@gmail.com wrote:
If get-in is to be consistent with get, it better allow to specify a
default value:
(get-in nested-structure [k1 k2 ... kN] :default something)
-- would it make
Hi All -
I am trying convert a function to use loop/recur and am getting the
dreded
java.lang.UnsupportedOperationException: Can only recur from tail
position (repl-1:414) error
(at least dreded for newbies...)
The function takes 2 joda dates and returns a sequence of dates
starting at the
I'm running into this issue as well.
On Mon, May 17, 2010 at 4:18 PM, Terrence Brannon scheme...@gmail.comwrote:
Hello, I wanted to try out Clojure. It was my understanding that
swank-clojure was a package GNU Emacs that would download clojure
automatically. But the docs for it no longer say
Thanks Mike -
So I was doing a little more digging on this and came across an
interesting blog posting:
http://formpluslogic.blogspot.com/2009/07/clojure-lazy-seq-and-recursion.html
discussing the use of recursion vs lazy sequences.
To mimic Brent from his posting I created 2 fn's:
(defn
Note that your recur call is wrapped in a cons. It is *not* in the
tail position.
(def date-seq
(fn [d1 d2]
(loop [b (- d1
(.dayOfMonth)
(.withMinimumValue))
e d2]
(cons b (if (time/before? b e)
(recur (.plusMonths b 1) e)) ;; Inside
I am seeing the same issue, also with ELPA. Has anyone been able to
resolve this issue?
Used the emacs starter kit (http://github.com/technomancy/emacs-
starter-kit) and then installed swank-clojure using ELPA.
All the other functionality seems to be working just fine.
Thanks
Robbie
On May 17,
How does labrepl integrate with Enclojure, and does anyone manage to
use an IDE effectively with lein/maven?
I use CCW in Eclipse, but I used Netbeans + Enclojure + labrepl in the
past. I fired NB up again and did the following and it seemed to work
OK. This is with Netbeans 6.8 with
Actors in Erlang DO have mutable state, you're just discouraged from
using it. ;) No really, erl -man get and set. Sometimes you're forced
to use this despite the best of intentions.
But I really have to ask, how composable were monads again?
- dlf
On Mon, May 17, 2010 at 3:04 AM, Peter
Seconded, I'm having troubles with both swank-clojure and clojure.
--
Paul Hobbs
On Mon, May 17, 2010 at 1:18 PM, Terrence Brannon scheme...@gmail.comwrote:
Hello, I wanted to try out Clojure. It was my understanding that
swank-clojure was a package GNU Emacs that would download clojure
I tried to play around with thread with these lines of code. It should
print the value of variable but it doesn't..
In emacs.
user (def x 5)
#'user/x
user x
5
user (import [java.lang Thread])
java.lang.Thread
user (.start (Thread. (fn [] (print x
nil
or with agent
user (def foo (agent 0))
On Mon, 17 May 2010 10:38:43 -0400, grav mikk...@gmail.com wrote:
clojure-mode 1.7.1
slime 20100404
slime-repl 20100404
swank-clojure 1.1.0
You'll need swank-clojure 1.2.1 to work with that version of slime.
--
Hugo Duncan
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You received this message because you are subscribed to the
i don't expect it would be hard to write an Erlang program with 2
actors that would deadlock.
Of course it wouldn't.
as far as i know, people use timeouts on
message handling to sweep it under the carpet.
Most people probably use the OTP library with well-defined behaviors
is what they call
Hi Base,
It's useful to think of the pattern of loop/recur and then apply it
to your problem. I.e
(loop [-- initial bindings --]
(if --- terminating condition ---
---return result---; otherwise...
(do-stuff with bindings
(recur ---with new bindings---
A simple
Per Phil Hagelberg's suggestion on IRC, I downloaded and used his
package.el, which fixed the issue for me:
http://github.com/technomancy/package.el/raw/master/package.el
Phil said the bug hasn't been patched upstream.
Justin
On May 17, 4:18 pm, Terrence Brannon scheme...@gmail.com wrote:
Hi,
On May 18, 1:23 am, Base basselh...@gmail.com wrote:
(defn lazy-date-seq [d1 d2]
(let [start (- d1
(.dayOfMonth)
(.withMinimumValue))]
(lazy-seq
(cons start
(if (joda/before? start d2)
(lazy-date-seq (.plusMonths start
On May 18, 2:23 am, Base basselh...@gmail.com wrote:
(defn lazy-date-seq [d1 d2]
(let [start (- d1
(.dayOfMonth)
(.withMinimumValue))]
(lazy-seq
(cons start
(if (joda/before? start d2)
(lazy-date-seq (.plusMonths start 1)
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