Hi,
On Jun 23, 11:23 pm, James Reeves weavejes...@googlemail.com wrote:
1. Have you written, or are you writing, a web application that uses
Clojure? What does it do?
I'm guerilla coding a small web app to do some very non-standard
statistical analysis of customer returns (ABS/ESC systems for
While writing JSON is fast, reading it back into a Clojure map is
slow; even with clj-json, based on Jackson.
Here's an idea: use Jackson's ObjectMapper. The following line
extracts a Java Map:
MapString,Object userData = mapper.readValue(new File(user.json),
Map.class)
(from
Hi,
What are the use cases you have in mind ?
2010/6/23 Timothy Baldridge tbaldri...@gmail.com:
I'm wondering if we're going about this slightly the wrong way. Let's
take a look at CouchDB. CouchDB prefers to keep all data on the disk
at all times. As docs (or items) are added to a database
1. Have you written, or are you writing, a web application that uses
Clojure? What does it do?
I am and have been extending an existing production java web
application environment with all new server work now being done in
clojure. It is a complex jvm server running tomcat and other threaded
To my naive inexperienced eyes, there doesn't seem to be something
obviously wrong with your code.
Since FOR returns a lazy sequence of the results, is this function
safe? (Seeing that it is not side-effect free?)
I'm not getting this, do you foresee any safety issues? I think that
the logs
Hi,
2010/6/17 William Wadsworth will.wadsworth...@gmail.com:
Hi.
I have just started learning Clojure and I am really enjoying
myself. However, I am still getting to grips with the workings of its
concurrency model, so please excuse me if my question seems too
obvious.
I have some code
2010/6/24 Laurent PETIT laurent.pe...@gmail.com:
Hi,
2010/6/17 William Wadsworth will.wadsworth...@gmail.com:
Hi.
I have just started learning Clojure and I am really enjoying
myself. However, I am still getting to grips with the workings of its
concurrency model, so please excuse me if my
I'm also facing the same problem -
(let [handler (agent 50)
a (agent 42
:error-handler
(fn [_ ex]
(do
(println Inside agent a error handler fn (Thread/
currentThread))
(send handler
(fn [_] (do
On Jun 23, 12:29 pm, Stuart Halloway stuart.hallo...@gmail.com
wrote:
I think the behavior you are seeing here is reasonable. When you mix
compilation and dynamic access to vars, you need to reason carefully about
the order in which things will happen.
In general I would say that code
On Jun 18, 11:56 pm, cageface milese...@gmail.com wrote:
Unfortunately there seems to be a lot more commercial momentum for
Scala though. It's still a blip compared to the mainstream languages
but I'm seeing more and more job posts mentioning it, and hardly any
for Clojure. I don't think
Another thing I noticed, clojures array functions are using int's as index, so
to get best performance from them you currently need to cast every counter you
use to a int by hand so you have (loop [i (int 0)] ... since otherwise there
will be a lot of type casting when accessing arrays. So a
This works:
(. JOptionPane showMessageDialog frame Hello World)
This does not:
(. JOptionPane showMessageDialog frame Hello World Title
JOptionPane/PLAIN_MESSAGE)
Even though JOptionPane.showMessage supports both signatures. How do I
call the second one from clojure?
martin
--
You
Hi,
On Jun 24, 3:53 pm, Martin DeMello martindeme...@gmail.com wrote:
This works:
(. JOptionPane showMessageDialog frame Hello World)
This does not:
(. JOptionPane showMessageDialog frame Hello World Title
JOptionPane/PLAIN_MESSAGE)
Even though JOptionPane.showMessage supports both
On Thu, Jun 24, 2010 at 7:32 PM, Meikel Brandmeyer m...@kotka.de wrote:
Hi,
On Jun 24, 3:53 pm, Martin DeMello martindeme...@gmail.com wrote:
Both work for me. What's the error you get?
Looks like my mistake, I tried it now and it works. No idea what I did
wrong the last time (I got the No
I'm having trouble throwing an exception with the error message I want from
a list of error codes. Here's a simple example of the problem:
(def messages (map #(str %) [1 2 3]))
(println messages)
(throw (java.lang.Exception. (str Whoops: messages)))
The println prints the messages just fine -
Is it possible to define custom atom/data types?
Example: I would like an atom prefixed with $ to maintain it's own
type/class.
i.e.
(class $myatom)
clojure.lang.CustomeName
Thanks,
Tim
--
You received this message because you are subscribed to the Google
Groups Clojure group.
To post to
Hi,
I've started developing a web application using Compojure. I use
CouchDB for storing data.
Currently I've just created a dal.clj file to contain all the CRUD
functions.
I might later decide that I want to switch to other Database so I want
to make the ground ready for this.
So my question
Ok, then I understand why it didn't work, but that means that the
struct (that is sent by the add-message function) is put in a sequence
somewhere on the way to being validated. Is this right, and where does
this happen?
;All the relevant code
(defstruct message :sender :text)
(def
Hi James,
For me the big missing item is Comet/Websockets support. More and more
of the web
development I do requires near real time communication and to have
that feature integrated
in the framework (like lift) would be great.
thanks
Jimmy
--
You received this message because you are subscribed
Hi!
On Jun 24, 12:04 pm, ka sancha...@gmail.com wrote:
To my naive inexperienced eyes, there doesn't seem to be something
obviously wrong with your code.
Since FOR returns a lazy sequence of the results, is this function
safe? (Seeing that it is not side-effect free?)
I'm not getting
Hi!
On Jun 24, 12:16 pm, Laurent PETIT laurent.pe...@gmail.com wrote:
2010/6/24 Laurent PETIT laurent.pe...@gmail.com:
Hi,
2010/6/17 William Wadsworth will.wadsworth...@gmail.com:
Hi.
I have just started learning Clojure and I am really enjoying
myself. However, I am still getting
Hi,
On Jun 24, 6:34 am, Steve Molitor stevemoli...@gmail.com wrote:
user= (throw (java.lang.Exception. (str Whoops: messages)))
java.lang.Exception: Whoops: clojure.lang.lazy...@13291 (NO_SOURCE_FILE:0)
Wrap messages into a call to seq.
Sincerely
Meikel
--
You received this message
You are correct. The struct is a single message. The messages object holds a
ref to N of them (initially an empty vector).
Individual messages are added by alter ... conj in add-message.
Stu
Ok, then I understand why it didn't work, but that means that the
struct (that is sent by the
Hi,
alter calls conj on [] (which is kept as a vector) since it is the
initial content of the messages ref. So the content of messages is a
seqable thing and not a single message.
Sincerely
Meikel
--
You received this message because you are subscribed to the Google
Groups Clojure group.
To
On Wed, Jun 23, 2010 at 5:23 PM, James Reeves
weavejes...@googlemail.com wrote:
1. Have you written, or are you writing, a web application that uses
Clojure? What does it do?
we are currently developing a game server backend using clojure.
2. Which libraries or frameworks are you using? Which
I'd call it with-auto-promotion.
--
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
I don't use Clojure for web development and I thought sharing why could be
useful too.
For web development, my favourite tool is
Djangohttp://www.djangoproject.com/.
It comes as a fullstack framework which means I have everything I need out
of the box. Templates, caching, ORM, a kick-ass
1. Have you written, or are you writing, a web application that uses
Clojure? What does it do?
I've created a commercial app that has the server side written start
to finish in Clojure. It leverages the existing calendaring and
scheduling functionality of ScheduleWorld - which was written in
1. Have you written, or are you writing, a web application that uses
Clojure? What does it do?
I am an independent contractor and do a lot of corporate intranet web
applications. All of my clients support Java. Each year I write a few
new applications and spend a lot of time maintaining old Java
Hi,
Am 24.06.2010 um 07:36 schrieb Tim Robinson:
Is it possible to define custom atom/data types?
Example: I would like an atom prefixed with $ to maintain it's own
type/class.
i.e.
(class $myatom)
clojure.lang.CustomeName
You can use the old way of defining types: by adding a tag to
Good point. I have a todo waiting for me to figure out how to deliver
some services that HTTP might not be cut out for. It looks like v3.0
servlets have a variety of enhancements in this area, so hopefully
compojure/ring can stand on those shoulders. I've no idea about the
container
2010/6/24 William Wadsworth will.wadsworth...@gmail.com:
Hi!
On Jun 24, 12:16 pm, Laurent PETIT laurent.pe...@gmail.com wrote:
2010/6/24 Laurent PETIT laurent.pe...@gmail.com:
Hi,
2010/6/17 William Wadsworth will.wadsworth...@gmail.com:
Hi.
I have just started learning Clojure and
Has anyone else had a chance to try this? I'm surprised to see manual
buffering behaving so much better than the BufferedReader
implementation but it does seem to make quite a difference.
--
You received this message because you are subscribed to the Google
Groups Clojure group.
To post to this
That did the trick, thanks.
Steve
On Thu, Jun 24, 2010 at 9:43 AM, Meikel Brandmeyer m...@kotka.de wrote:
Hi,
On Jun 24, 6:34 am, Steve Molitor stevemoli...@gmail.com wrote:
user= (throw (java.lang.Exception. (str Whoops: messages)))
java.lang.Exception: Whoops:
Thanks! I think that should do it for me.
I've been writing my own custom *semi* JSON parser/combinator (JSON
only hacked to let me to include js functions).
My first cut works, but I had implemented string searches for js
qualifiers. I didn't like the implementation since it string searches
We have written a currency trading app in Clojure in my company.
It has an embedded web server with a compojure app that provides an
administration interface.
2. Which libraries or frameworks are you using? Which versions?
Some relevant dependencies are:
[compojure
1. Have you written, or are you writing, a web application that uses
Clojure? What does it do?
I am new to Clojure, I've ported over most of my code for an ad-hoc
application creator / with reporting and GIS integration.
I'm pretty much finished. I benchmarking speed.
2. Which libraries or
On Thu, Jun 24, 2010 at 3:12 PM, Tim Robinson tim.blacks...@gmail.comwrote:
(def stuff {:key1 {:item1 {:sub1 val1}})
(((stuff :key1) :item1) sub1) --- YUCK
val1
(get-in m [:key1 :item1 :sub1]) --- YUM ;)
(rest stuff)
(2 3 4 5)
(next stuff)
(2 3 4 5) this can be done
On Thu, Jun 24, 2010 at 12:27 PM, Daniel Gagnon redalas...@gmail.comwrote:
I don't use Clojure for web development and I thought sharing why could be
useful too.
For web development, my favourite tool is
Djangohttp://www.djangoproject.com/.
It comes as a fullstack framework which means I
Are there any good articles on clojure double dispatch using protocols
(not multimethods) via the visitor pattern or whatever would be
appropriate? I feel like that after single dispatch on type, double
dispatch on type is the next common use case for multimethods. I
somewhat recall Rich talking
Thanks for both the replies.
(get-in m [:key1 :item1 :sub1]) --- YUM ;)
(- stuff :key1 :item1 sub1)
are better than what I've been doing!
Re: (next...)
I still like mine better, fortunately I can create my own functions,
but I was just highlighted that some of the function names are not
Tim,
I just sent my resume to j...@sonian.net.
Thanks!
Steve Molitor
On Wed, Jun 23, 2010 at 12:02 PM, Tim Dysinger t...@dysinger.net wrote:
Sorry I didn't provide enough detail on that last post. Please send
your interest to jobs on sonian.net with clojure in the subject.
On Wed, Jun
If anyone is curious, I ended up learning about and using protocols.
It was pretty trivial to convert since it was basically what I was
already doing, although I wasn't really using protocols for
dispatching but for grouping of functions together with shared data.
On Jun 1, 7:09 pm, Brent Millare
So out of curiosity I did some benchmarking of the new equal branch and wanted
to see how much I can get out of clojure if I push the limits. Now that said I
know equal isn't done yet but I figured it won't hurt. Bad news first, despite
all my attempts clojure was still slower then optimized
On Thu, Jun 24, 2010 at 5:08 PM, Heinz N. Gies he...@licenser.net wrote:
So out of curiosity I did some benchmarking of the new equal branch and
wanted to see how much I can get out of clojure if I push the limits. Now
that said I know equal isn't done yet but I figured it won't hurt. Bad news
Hi,
Am 24.06.2010 um 21:12 schrieb Tim Robinson:
I would like some chaining to less the brackets.
i.e.
(def stuff {:key1 {:item1 {:sub1 val1}})
(((stuff :key1) :item1) sub1) --- YUCK
val1
Instead do this:
stuff:key1:item1:sub1
val1
(- stuff :key1 :item1 sub1)
Also, some of
On Thu, Jun 24, 2010 at 5:17 PM, David Nolen dnolen.li...@gmail.com wrote:
On Thu, Jun 24, 2010 at 5:08 PM, Heinz N. Gies he...@licenser.net wrote:
So out of curiosity I did some benchmarking of the new equal branch and
wanted to see how much I can get out of clojure if I push the limits. Now
Hi,
Am 24.06.2010 um 22:07 schrieb Tim Robinson:
Along this vein, I find the documentation is great, but a little hard
to navigate around.
http://richhickey.github.com/clojure
http://richhickey.github.com/clojure-contrib
Note the branch links on the top left.
Sincerely
Meikel
--
You
On 24 June 2010 23:17, David Nolen dnolen.li...@gmail.com wrote:
Don't have time to dive into this right now, but all I can say is now you
are starting to have an idea what the other side looks like. The kind of
hoop jumping you have to do get within 3x of Scala is absurd.
I have to admit this
If you want some ideas: http://gist.github.com/452032
This was posted earlier in the ML in an un-optimized Clojure form as taking
98secs while the Java version took about 16ms on the OP's machine. With
Rich's latest changes this optimized Clojure code runs in about 20-25ms on
my i7 laptop.
David
On Jun 23, 11:37 pm, Stuart Halloway stuart.hallo...@gmail.com
wrote:
I can certainly see why this would be confusing! Is there a way to make it
better without violating the expectations of someone who knows the Java API
and expects strings to be treated as URIs?
Perhaps throwing an
Hi, I am a newbie trying to learn Clojure. I would like to try the
labrepl environment, but due to my circumstances I have to download
all the jars manually one by one and install them manually in
NetBeans. The trouble is, I cannot find most of the jars to download.
So far, I have
I put a self-contained test up here:
http://gist.github.com/452095
To run it copy this to slurptest.clj and run these commands
java clojure.main slurptest.clj makewords 100 (100 seems good for
macs, 300 for linux)
java -Xmx3G -Xms3G clojure.main slurptest.clj slurp|
slurp2
Trying either slurp
Really no way that you could download the dependency jars through,
say, Maven...? (As documented in labrepl's readme [1].)
If not, you can download the jars from the Maven repositories by hand.
The relevant repos are Hudson [2] (for clojure.jar and
clojure-contrib.jar; use the releases section),
1. Have you written, or are you writing, a web application that uses
Clojure? What does it do?
roman candle is a web app designed to let me control X10 plc
components from any web-capable device, using the X10 firecracker
controller. It's still in very early development, and hasn't been
given
[Not really about enhanced primitive support - more about optimization
on the jvm.]
On Tue, 22 Jun 2010 01:47:26 -0400
David Nolen dnolen.li...@gmail.com wrote:
Yet consider this, If I'm writing OpenGL code in Penumbra I will have quite
a bit of code that amounts to the following:
; 630
On Wed, Jun 23, 2010 at 2:23 PM, James Reeves
weavejes...@googlemail.com wrote:
Hello there!
Chas Emerick's recent State of Clojure survey [http://bit.ly/dtdAwb]
indicated that a significant proportion of Clojure users are beginning
to use Clojure for web development. A recent Hacker News
When exactly did people start expecting Clojure to be as fast as Java
and/or Scala?
I seem to recall in one of the original Clojure videos, Rich talked
about the relationship between Clojure and Java. There's a long
history of C programmers dropping down to assembly, Python programmers
dropping
On Jun 24, 2010, at 10:50 PM, Mark Engelberg mark.engelb...@gmail.com wrote:
When exactly did people start expecting Clojure to be as fast as Java
and/or Scala?
One of the earlier talk/video, the claim was clojure is between 1x to 3x of java
performance.
Fast math performance was touched
Mark,
I don't disagree with your message as a whole, but:
Once you start using mutable arrays and type hinting every single
variable, why aren't you just using Java?
The argument I've heard is this: there are two ways to get a fast
program in a slow-by-default language.
The first is
On Thu, Jun 24, 2010 at 10:50 PM, Mark Engelberg
mark.engelb...@gmail.comwrote:
With respect to this particular benchmark, I don't think it will be
possible to get idiomatic code in the same ballpark as Java, because
if you use Clojure's vectors to store the permuted values, they will
be
61 matches
Mail list logo
