Re: New Primitive data types (equal branch) - impact on optimized code.

On Thu, Jun 24, 2010 at 10:50 PM, Mark Engelberg wrote: > 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 boxed. Unless Clojure st

Re: New Primitive data types (equal branch) - impact on optimized code.

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 Pytho

Re: New Primitive data types (equal branch) - impact on optimized code.

On Jun 24, 2010, at 10:50 PM, Mark Engelberg 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 on here also http://www

Re: New Primitive data types (equal branch) - impact on optimized code.

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 d

Re: State of Clojure web development

On Wed, Jun 23, 2010 at 2:23 PM, James Reeves 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 posting > [http://bit.l

Re: Enhanced Primitive Support

[Not really about enhanced primitive support - more about optimization on the jvm.] On Tue, 22 Jun 2010 01:47:26 -0400 David Nolen 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 msecs > (dotimes [_ 10

Re: State of Clojure web development

> 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

Re: Having trouble with labrepl jars

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),

Re: slow raw io

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 or

Having trouble with labrepl jars

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 circumspect-0.0.1

Re: clojure.xml/parse cannot handle filenames containing #

On Jun 23, 11:37 pm, Stuart Halloway 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 appropriately informative excep

Re: New Primitive data types (equal branch) - impact on optimized code.

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

Re: New Primitive data types (equal branch) - impact on optimized code.

On 24 June 2010 23:17, David Nolen 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 is true... (With

Re: State of Clojure web development

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 rece

Re: New Primitive data types (equal branch) - impact on optimized code.

On Thu, Jun 24, 2010 at 5:17 PM, David Nolen wrote: > On Thu, Jun 24, 2010 at 5:08 PM, Heinz N. Gies 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 do

Re: State of Clojure web development

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) > A

Re: New Primitive data types (equal branch) - impact on optimized code.

On Thu, Jun 24, 2010 at 5:08 PM, Heinz N. Gies 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 > first, despit

New Primitive data types (equal branch) - impact on optimized code.

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 sca

Re: Trying to make my code extensible

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

Re: State of Clojure web development

> 1. Have you written, or are you writing, a web application that uses > Clojure? What does it do? Recently started writing a webapp to display financial data, along the lines of Google finance. Although somewhat less ambitious :). > 2. Which libraries or frameworks are you using? Which versions?

Re: Hiring again - need 3 devs before fall 2010

Tim, I just sent my resume to j...@sonian.net. Thanks! Steve Molitor On Wed, Jun 23, 2010 at 12:02 PM, Tim Dysinger 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 23, 2010 at 8:

Re: State of Clojure web development

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

Protocols and visitor pattern

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 ab

Re: State of Clojure web development

On Thu, Jun 24, 2010 at 12:27 PM, Daniel Gagnon wrote: > I don't use Clojure for web development and I thought sharing why could be > useful too. > > For web development, my favourite tool is > Django. > It comes as a fullstack framework which means I have everythin

Re: State of Clojure web development

On Thu, Jun 24, 2010 at 3:12 PM, Tim Robinson wrote: > > > (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 with res

Re: State of Clojure web development

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 fram

Re: State of Clojure web development

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 "0.4.0-SNAPS

Re: Is it possible to define custom atom/data types?

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 ever

Re: Weird problem with lazy seqs and throwing exceptions

That did the trick, thanks. Steve On Thu, Jun 24, 2010 at 9:43 AM, Meikel Brandmeyer wrote: > Hi, > > On Jun 24, 6:34 am, Steve Molitor wrote: > > > user=> (throw (java.lang.Exception. (str "Whoops: " messages))) > > java.lang.Exception: Whoops: clojure.lang.lazy...@13291(NO_SOURCE_FILE:0) > >

Re: slow raw io

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

Re: clojure.contrib.logging in "side-effect free" functions?

2010/6/24 William Wadsworth : > Hi! > > On Jun 24, 12:16 pm, Laurent PETIT wrote: >> 2010/6/24 Laurent PETIT : >> >> >> >> > Hi, >> >> > 2010/6/17 William Wadsworth : >> >> Hi. >> >> >> I have just started learning Clojure and I am really enjoying >> >> myself. However, I am still getting to grips

Re: State of Clojure web development

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 supp

Re: Is it possible to define custom atom/data types?

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

Re: State of Clojure web development

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 a

Re: State of Clojure web development

> > 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 i

Re: State of Clojure web development

I don't use Clojure for web development and I thought sharing why could be useful too. For web development, my favourite tool is Django. It comes as a fullstack framework which means I have everything I need out of the box. Templates, caching, ORM, a kick-ass autogen

Re: ops' macro to tidy +', -', *', /' operations?

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 fro

Re: State of Clojure web development

On Wed, Jun 23, 2010 at 5:23 PM, James Reeves 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 versions? > we are usi

Re: Question about "every?"

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 p

Re: Question about "every?"

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 add

Re: Weird problem with lazy seqs and throwing exceptions

Hi, On Jun 24, 6:34 am, Steve Molitor 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 because you are subscrib

Re: clojure.contrib.logging in "side-effect free" functions?

Hi! On Jun 24, 12:16 pm, Laurent PETIT wrote: > 2010/6/24 Laurent PETIT : > > > > > Hi, > > > 2010/6/17 William Wadsworth : > >> 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 mod

Re: clojure.contrib.logging in "side-effect free" functions?

Hi! On Jun 24, 12:04 pm, ka 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 this, do you

Re: State of Clojure web development

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

Re: Question about "every?"

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 validate-me

Data Access Layer design

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 is,

Is it possible to define custom atom/data types?

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 t

Weird problem with lazy seqs and throwing exceptions

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 -

Re: calling an overloaded java method

On Thu, Jun 24, 2010 at 7:32 PM, Meikel Brandmeyer wrote: > Hi, > > On Jun 24, 3:53 pm, Martin DeMello 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 matching method: showMessageDialog

Re: calling an overloaded java method

Hi, On Jun 24, 3:53 pm, Martin DeMello 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 signatu

calling an overloaded java method

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

Re: Enhanced Primitive Support

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 goo

Re: scala

On Jun 18, 11:56 pm, cageface 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 Scala is a bad lang

Re: Compiling a namespace causes subsequent uses of it to fail.

On Jun 23, 12:29 pm, Stuart Halloway 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 working differently depending

Re: Can't send from agent error handler?

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 (print

Re: clojure.contrib.logging in "side-effect free" functions?

2010/6/24 Laurent PETIT : > Hi, > > 2010/6/17 William Wadsworth : >> 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. >> >>

Re: clojure.contrib.logging in "side-effect free" functions?

Hi, 2010/6/17 William Wadsworth : > 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 that reads data from a

Re: clojure.contrib.logging in "side-effect free" functions?

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

Re: State of Clojure web development

> 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 p

Re: STM style disk persistance

Hi, What are the use cases you have in mind ? 2010/6/23 Timothy Baldridge : > 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 they extend > that