Re: newbie encountering java.lang.OutOfMemoryError: Java heap space

Again, your input was incredibly beneficial for me. William: Thank you for your comments. As i wrote, eventually I came up with a different solution altogether. To answer your question concerning the previous code: my initial idea was that since (although unproven) all the different sequences fin

Re: Contributing to Clojure.Contrib

Hi, On Feb 11, 12:57 am, Wardrop wrote: > As part of my second question, could someone take a look at the code > I've posted and tell me if it's a good implementation and follows > clojure idioms and standards. I haven't checked the algorithm itself, but just some random notes after skimming th

Re: refs, agents and add-watch

This solved the problem: (defn ask-material [a-key the-ref old-state new-state] (if (<= new-state 0) (dosync (alter material + (int (rand 10) (str "asked for materials")) When the function ask-materials is invoked, it updates the state of the agent that caused

Re: refs, agents and add-watch

On 11 February 2010 02:50, MiltondSilva wrote: > I have this code: > > [snip] > > java.lang.RuntimeException: Agent has errors (repl-1:8) Your code works fine for me. To help you debug your problem: you can use (agent-errors artisan) to discover what the exception is about, clear-agent-errors to

refs, agents and add-watch

I have this code: (def material (ref 2)) (def products-store (ref 2)) (def products (ref 0)) (def artisan (agent "idle")) (defn manufacture [state] (dosync (alter material dec) (alter products inc)) (str "idle")) (defn ask-material [a-key the-ref o

Re: Noob question: rebinding using def

Ah, I didn't know about the reduce function. I'll give that a try and thanks a lot. On Feb 10, 10:42 pm, Brenton wrote: > chaosprophet, > > Clojure wants you to think in terms of sequences instead to loops. > Instead to looping through cat-all and keeping track of the sum, you > want to use map a

Hiring round #6

Hello, We have a very interesting big-data project & need more devs. We are looking for our 7th clojure dev on an all work-at-home team. You must live in the US to be on our team.Full-time employees get a MBP 15" & 3g (for travel & backup internet). So far our team consists of (in no particu

Re: Contributing to Clojure.Contrib

http://groups.google.com/group/clojure-dev/browse_thread/thread/d090b5599909497c# On Wed, Feb 10, 2010 at 3:57 PM, Wardrop wrote: > Thanks for the link. > > As part of my second question, could someone take a look at the code > I've posted and tell me if it's a good implementation and follows > c

Re: Contributing to Clojure.Contrib

Thanks for the link. As part of my second question, could someone take a look at the code I've posted and tell me if it's a good implementation and follows clojure idioms and standards. By the way, does anyone know of a good resource that specifies common clojure coding and formatting standards, l

Re: defn within defn

Hi, Bill. oh, letfn is what I wanted ! Thank you. Sorry, I missed preview disqussion. letfn - mutually recursive local functions http://groups.google.com/group/clojure/browse_thread/thread/a7aad1d5b94db748 letfn is pretty good. --

Re: Dutch Clojure users

Just at home, 4 of us were there. 1 american, 1 italian, 1 pole and me, a dutchy. I don't think this was the last time for me, and maybe some day I should invite you to Ede :) or arrange something in Utrecht or Rotterdam (I work there nearby). 2010/2/10 Joost > On 7 feb, 13:09, Hubert Iwaniuk w

Re: Contributing to Clojure.Contrib

Take a look here: http://clojure.org/contributing On Feb 10, 6:38 pm, Wardrop wrote: > I've written a function which I think would be a good inclusion into > the Clojure.Contrib library. I have two questions though, the first is > how? How do I go about adding a single function to an existing >

Re: Contributing to Clojure.Contrib

http://clojure.org/contributing seq-utils was recently renamed: http://groups.google.com/group/clojure-dev/browse_thread/thread/49068754a8c2efb9# On Wed, Feb 10, 2010 at 3:38 PM, Wardrop wrote: > I've written a function which I think would be a good inclusion into > the Clojure.Contrib library. I

Contributing to Clojure.Contrib

I've written a function which I think would be a good inclusion into the Clojure.Contrib library. I have two questions though, the first is how? How do I go about adding a single function to an existing namespace; in this case, seq-utils, and what are the pre-requisites? My second question is, wha

Re: defn within defn

scheme's define is scoped inside a function. clojure is not scheme. clojure's def (which defn uses) is not lexical or scoped in anyway, it always operates on global names. if you want lexical scope please use one of clojure's lexical scoping constructs, let or letfn. On Wed, Feb 10, 2010 at 1:28 P

Re: defn within defn

Hozumi, nested defn's are definitely not recommended. I suggest using letfn for the inner function. Bill Smith Austin, TX On Feb 10, 3:28 pm, Hozumi wrote: > Hi all. > Is it not recommended to use defn within defn? > > Normal function is faster than the function which has inner function > which

defn within defn

Hi all. Is it not recommended to use defn within defn? Normal function is faster than the function which has inner function which actually doesn't run. -- (defn aaa1 [] (defn bbb [] 1) 1) (defn aaa2 [] 1) user> (time

Re: how to determine what implements a protocol?

Hi, Am 10.02.2010 um 22:20 schrieb Stuart Sierra: > No need to slap your forehead, but here it is: > - > clojure.core/extends? > ([protocol atype]) > Returns true if atype explicitly extends protocol This only checks whether extend was explicitly called on atype. What yo

Re: how to determine what implements a protocol?

> clojure.core/extends? doesn't seem to cover all the use cases? or i'm mistyping (er ha ha) something? (ns p) (defprotocol P1 (foo [this])) (ns d) (deftype T1 [f] :as this p/P1 (foo [] (println this))) (deftype T2 [f] :as this) (extend ::T2 p/P1 {:foo (fn [this] (println this))}) (println "P1?T1

Re: Interesting ICFP slides from Guy Steele -- Organizing Functional Code for Parallel Execution

Yeah, I'm aware of the tree nature of many clojure data structures, but just wasn't sure that applied to actual lists. On Feb 10, 12:06 pm, André Ferreira wrote: > What he said is basically right, only instead of list it's called > vector. Not sure if vector branching is 64 or 32. -- You receiv

Re: how to determine what implements a protocol?

On Wed, Feb 10, 2010 at 1:20 PM, Stuart Sierra wrote: > No need to slap your forehead, but here it is: > - > clojure.core/extends? > ([protocol atype]) >  Returns true if atype explicitly extends protocol thanks! at least a "d'oh" will be required. -- You received this

Re: how to determine what implements a protocol?

No need to slap your forehead, but here it is: - clojure.core/extends? ([protocol atype]) Returns true if atype explicitly extends protocol -SS On Feb 10, 4:03 pm, Raoul Duke wrote: > hi, > > is there a query to tell me if a datatype implements a particular > protocol?

Re: Dutch Clojure users

On 7 feb, 13:09, Hubert Iwaniuk wrote: > Great to hear that there is Clojure group around. > > For ease of finding > it:http://groups.google.com/group/amsterdam-clojurians?hl=en > > Cheers, > Hubert Joined as well. I'm in Utrecht. Shame I missed today's meeting. -- You received this message

Re: Interesting ICFP slides from Guy Steele -- Organizing Functional Code for Parallel Execution

2010/2/10 André Ferreira : > What he said is basically right, only instead of list it's called > vector. Not sure if vector branching is 64 or 32. If you could append two vectors quickly in Clojure, you'd be able to use a lot of the techniques described in those slides. The whole discussion also

how to determine what implements a protocol?

hi, is there a query to tell me if a datatype implements a particular protocol? i'm guessing there must be some forehead-slapping answer, but i haven't gleaned the clue yet :-{ thanks. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this

Re: clojure gen-class questions

Hi, Am 10.02.2010 um 21:05 schrieb Brian Wolf: > As a beginner, I tried running the first example,changing namespaces > or not, etc ,and I keep getting > > user=> (ns some.Example >(gen-class)) > nil > some.Example=> (defn -toString > [this] > "HI !") >

The Detroit Java User Group Looking For a Speaker

Hello, I apologize in advance it this is an inappropriate forum for this message. I organize the Detroit Java User Group (www.detroitjug.org) and I'd like to find a knowledgeable speaker who can present Clojure to our JUG. If there are any members of the group in the Michigan or Ohio area that

Re: Interesting ICFP slides from Guy Steele -- Organizing Functional Code for Parallel Execution

What he said is basically right, only instead of list it's called vector. Not sure if vector branching is 64 or 32. On 10 fev, 15:42, Paul Mooser wrote: > I ran across this on reddit this morning, and thought people on the > group might find it interesting: > > http://docs.google.com/viewer?url=

Re: clojure gen-class questions

Meikel, As a beginner, I tried running the first example,changing namespaces or not, etc ,and I keep getting user=> (ns some.Example (gen-class)) nil some.Example=> (defn -toString [this] "HI !") #'some.Example/-toString some.Example=> (ns user) nil

Re: Clojure binding for Open CL

A few months back I created very basic bindings for CL4Java (the code for it still exists in Penumbra, under src/opencl). It then subsequently was renamed to JOCL, which was already in use by another OpenCL library, and they started to work on combining their efforts, and I decided to wait until e

Re: Problems using clojure.contrib.string

yes On Feb 10, 1:25 pm, Matt Culbreth wrote: > Yes that worked very well, thanks Stuart.  I'm assuming that this fix > will make its way to the nightly build and will be published > tohttp://build.clojure.org/job/clojure-contrib/as usual? > > On Feb 10, 12:32 pm, Stuart Sierra > wrote: > > > >

Re: Problems using clojure.contrib.string

Yes that worked very well, thanks Stuart. I'm assuming that this fix will make its way to the nightly build and will be published to http://build.clojure.org/job/clojure-contrib/ as usual? On Feb 10, 12:32 pm, Stuart Sierra wrote: > Hi Matt, > Just pushed a fix, see if that helps. > > Note that

Re: newbie encountering java.lang.OutOfMemoryError: Java heap space

Looking at your post I notice some things that strike me as 'odd'. The use of (def) in a form that is not a top most form. From my experience this leads to trouble in the best of times. I think a better way would be to close over your known-map with a closure. While I don't have high hopes that c

Re: newbie encountering java.lang.OutOfMemoryError: Java heap space

Aviad, You don't get a speedup because you are never calling the memoized function with the same arguments. In your code, n is different each time. memoize basically creates a map of arguments to results. When you call the function with args that it has seen before it bypasses actually calling th

Re: newbie encountering java.lang.OutOfMemoryError: Java heap space

אביעד On 10 February 2010 19:54, Aviad Reich wrote: > Thank you all! > > your advice were indeed very helpful! > > I eventually solved it using memoization. and indeed keeping only 3 values > in memory. > (http://clojure-euler.wikispaces.com/Problem+014 - lxmonk, if you're > interested) > > Thi

Re: newbie encountering java.lang.OutOfMemoryError: Java heap space

Thank you all! your advice were indeed very helpful! I eventually solved it using memoization. and indeed keeping only (http://clojure-euler.wikispaces.com/Problem+014 - lxmonk if you're interested) This indeed is a great community, so let me try another (related) question. Comparing my solutio

Re: Noob question: rebinding using def

chaosprophet, Clojure wants you to think in terms of sequences instead to loops. Instead to looping through cat-all and keeping track of the sum, you want to use map and reduce. (reduce + (map #(probability-of-category-given-document % tokens) cat- all)) Brenton On Feb 10, 7:14 am, chaosprophet

Interesting ICFP slides from Guy Steele -- Organizing Functional Code for Parallel Execution

I ran across this on reddit this morning, and thought people on the group might find it interesting: http://docs.google.com/viewer?url=http%3A%2F%2Fresearch.sun.com%2Fprojects%2Fplrg%2FPublications%2FICFPAugust2009Steele.pdf&pli=1 It actually mentions clojure briefly at the end, although I'm not

Re: newbie encountering java.lang.OutOfMemoryError: Java heap space

Hi Aviad, Disclaimer: I haven't read the book, nor do I know Clojure very well. However, based on your question (which I did read) and Brenton's hint, it seems to me like the solution will involve a lazy sequence, which is a frequent tool to use whenever you're dealing with a problems that invo

Re: How would I write an emitter/collector?

On 10 Feb, 16:21, Greg wrote: > Patrick, > > I can't speak for the OP, but I found his question interesting and I'd like > to compliment you on your response. I've been experimenting with Patrick's solution - and it's really quite good. I had a function which collected the things I emitted, an

Noob question: rebinding using def

Hi guys, I'm new to both clojure and functional programming and as an exercise in learning Clojure, I decided to write a naive bayes categorizer. I have a piece of code wherein I have a doseq inside which i am calling a function which returns a value. What I would like to do is have the value retur

Re: Problems using clojure.contrib.string

Hi Matt, Just pushed a fix, see if that helps. Note that argument order was reversed in most functions from c.c.str- utils2 to c.c.string. -SS On Feb 10, 10:44 am, Matt Culbreth wrote: > Hello Group, > > I'm working on a Clojure project and I'm using Leiningen for the > builds.  I'm trying to

Re: XML problem

Hi, yvan wrote: Hello Clojure group I am testing Clojure and I have an error parsing thix XML excerpt below. Is this a SAX bug ou a Clojure bug .. or my mistake ? thank's for help IN REPL (ns x (:require [clojure.xml :as xml]) ) x=> (try (xml/parse "exampleSortieXML.xml")(catch E

Re: newbie encountering java.lang.OutOfMemoryError: Java heap space

Aviad, Welcome to Clojure. I don't want to tell you how to solve it. That's all part of the fun. But my hint to you would be that you don't need to keep all 1 million lists in memory. In fact, you should be able to solve this problem by only keeping three numbers in memory at any one time: The nu

Re: clojure gen-class questions

yes,thank you, this looks very helpful On Feb 9, 3:44 pm, Meikel Brandmeyer wrote: > Hi, > > I wrote up a post:http://tr.im/NwCL > > Hope it helps. > > Sincerely > Meikel -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send em

Re: How would I write an emitter/collector?

It sounds like Clojure might be a good fit for you then. I personally came to Clojure after getting fed up with Java, and experimenting with Ruby, so I can understand your predicament. The most dangerous thing to watch out for, and this really can't be stressed enough, is that learning Clojure is

Re: How would I write an emitter/collector?

On 10 Feb, 15:57, CuppoJava wrote: > Here's a revised version. OK. Wow guys. Thanks for your help. I've still a lot to learn, being new to Java, Lisp and Clojure. You are right, generators was the kind of thing I was after. I had come to Clojure after I had given up on VB.Net, and was lookin

Re: How would I write an emitter/collector?

Patrick, I can't speak for the OP, but I found his question interesting and I'd like to compliment you on your response. You gave alternative "Clojure-like ways" to do the same thing, but in addition to that you actually answered his question. I find these kinds of responses very instructive be

Re: How would I write an emitter/collector?

There are some bugs with my previous post. Here's a revised version. ;;--USING LIST COMPREHENSIONS--- (for [n (range 10) :when (even? n)] n) (apply concat (for [n (range 10) :when (even? n)] [n (* 2 n)])) ;;EMIT/COLLECT IMPLEMENTATION-- (def -collector) (defn em

Problems using clojure.contrib.string

Hello Group, I'm working on a Clojure project and I'm using Leiningen for the builds. I'm trying to use the most recent clojure and clojure- contrib, but I'm having a problem getting it to compile due to apparent errors in clojure.contrib.string. This works fine on the more stable versions of th

Re: How would I write an emitter/collector?

It looks like you want to implement something akin to what other languages call "generators". In Clojure, we generally use list comprehensions to get (almost) the same effect, but it's a little cleaner in my opinion. eg. in your first two examples (collect (doseq [ n (range 10)] (when (even?

Re: How would I write an emitter/collector?

Hi, On Feb 10, 1:23 pm, Mark Carter wrote: > I know that loo exists - and I'm puzzled by what the lazy functions > do. > > What I think would be interesting functionality is to have an emitter/ > collector combination, for example: > > (collect >   (doseq [ n (range 10)] >     (when (even? n) (e

Re: newbie encountering java.lang.OutOfMemoryError: Java heap space

thank you. I have "-server" and "-Xmx1024m" set in my 'swank-clojure-extra-vm-args, but the problem remains. Aviad On 10 February 2010 15:57, Joop Kiefte wrote: > (Disclaimer: never tried myself) > http://hausheer.osola.com/docs/5 > > 2010/2/10 Aviad R > > Hi all. >> >> I'm trying to learn c

Re: How would I write an emitter/collector?

On 10 Feb, 12:23, Mark Carter wrote: > Any ideas how I could implement > this? I've made a stab at it, but I'm not there yet. (import (java.util ArrayList List)) (defn arraylist->list [aList] (let [size (. aList size)] (loop [accum nil index 0] (if (< index size)

Re: XML problem

thanks to stackoverflow : http://stackoverflow.com/questions/866706/which-characters-are-invalid-unless-encoded-in-an-xml-attribute 2010/2/10 Laurent PETIT : > Here is the proof I was searching ! > > http://www.w3.org/TR/xml/#NT-AttValue > > 2010/2/10 Laurent PETIT : >> Hello Yvan, >> >> I guess

Re: error reporting for macro expansion

+1 on this. Although of course you could just use the shell for this (e.g. grep or awk). But it's certainly nicer to have that integrated in the compiler (possibly also in the compiled code?) On Feb 9, 12:45 pm, Jeff Rose wrote: > I agree, the error reporting from the compiler can often be hard t

Re: XML problem

Here is the proof I was searching ! http://www.w3.org/TR/xml/#NT-AttValue 2010/2/10 Laurent PETIT : > Hello Yvan, > > I guess it's neither a clojure nor java SAX parser problem, but rather > a problem in the xml file itself. > > It is illegal to have ampersands in attributes values. > > The amper

Re: Clojure binding for Open CL

>From his todo list (1), it looks as if ztellman (2) might have concrete plans to include it in the (currently OpenGL) wrapper project penumbra (3). 1. http://wiki.github.com/ztellman/penumbra/todo 2. http://ideolalia.com/ 3. http://github.com/ztellman/penumbra On Feb 9, 9:48 pm, ka wrote: > Hi,

Re: XML problem

Hello Yvan, I guess it's neither a clojure nor java SAX parser problem, but rather a problem in the xml file itself. It is illegal to have ampersands in attributes values. The ampersand & should be replaced by & everywhere in attribute values. In other case, the xml parser tries to resolve what

Re: Prepping clojure for packaging (was: Re: Clojure for system administration)

Hi, On Feb 10, 12:31 am, Brian Schlining wrote: > > > That's exactly what Debian does. For every Java package also provide > > > the maven xml file and the jar is discoverable from maven. The > > > installed packages on the local system acts as a local maven repo. > > > >  

Re: How would I write an emitter/collector?

This type of stuff could be done easily w/ the existing sequence fns You first one is simply (filter even? (range 10)) The second one is a little trickier, but it could be written like this (map (juxt identity #(* 2 %)) (filter even? (range 10))) This is usually considered better form th

Re: Clojure Dev Environment

2010/2/9 abaitam : > Hi, > There are several blog posts about setting up a development > environment for Clojure mostly in Emacs (and on Linux or Mac and not > Windows). Is there one place where I can find up-to-date information > on how to create a real-world Clojure project (and using Clojure and

Re: clojure gen-class questions

thanks! -- 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 this group, send email

Re: Clojure binding for Open CL

Not sure about Clojure bindings but the "JavaCL" bindings (both "mid"-level and low level) might get you closer: http://code.google.com/p/javacl/ OpenCL's ugly and finicky API is crying out for wrapping in better languages; and the OpenCL language itself would ideally get "wrapped" as well (see: h

Re: newbie encountering java.lang.OutOfMemoryError: Java heap space

(Disclaimer: never tried myself) http://hausheer.osola.com/docs/5 2010/2/10 Aviad R > Hi all. > > I'm trying to learn clojure with the excellent "Programming Clojure" > and projecteuler.net. I am encountering the java heap space error, and > can't find a workaround, nor a smarter way to write my

Clojure binding for Open CL

Hi, I was just wondering if (by now) Open CL has been 'wrapped' by higher level languages. I came across these from the Khronos site (http:// www.khronos.org/developers/resources/opencl/#timplementations) - 1. http://ruby-opencl.rubyforge.org/ 2. http://planet.plt-scheme.org/display.ss?package=ope

Re: Prepping clojure for packaging (was: Re: Clojure for system administration)

> > That's exactly what Debian does. For every Java package also provide > > the maven xml file and the jar is discoverable from maven. The > > installed packages on the local system acts as a local maven repo. > > > > > > I see they also solved the prob

How would I write an emitter/collector?

I know that loo exists - and I'm puzzled by what the lazy functions do. What I think would be interesting functionality is to have an emitter/ collector combination, for example: (collect (doseq [ n (range 10)] (when (even? n) (emit n would return the list (0 2 4 6 8). Any ideas how I

Clojure Dev Environment

Hi, There are several blog posts about setting up a development environment for Clojure mostly in Emacs (and on Linux or Mac and not Windows). Is there one place where I can find up-to-date information on how to create a real-world Clojure project (and using Clojure and Java libraries)? Do you know

XML problem

Hello Clojure group I am testing Clojure and I have an error parsing thix XML excerpt below. Is this a SAX bug ou a Clojure bug .. or my mistake ? thank's for help IN REPL (ns x (:require [clojure.xml :as xml]) ) x=> (try (xml/parse "exampleSortieXML.xml")(catch Exception e (. e p

Re: Newbie question - Functional programming & special cases

Thanks, that answers my questions. -- 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 f

Re: Clojure ad on StackOverflow.com

I'd vote for it. *smiles* On Feb 8, 2:23 am, Baishampayan Ghose wrote: > Hi, > > This is an interesting attempt by the StackOverflow people to promote > FOSS > projectshttp://meta.stackoverflow.com/questions/31913/open-source-advertising > sidebar-1h-2010/31972 (http://bit.ly/so-foss-ads) > > I

newbie encountering java.lang.OutOfMemoryError: Java heap space

Hi all. I'm trying to learn clojure with the excellent "Programming Clojure" and projecteuler.net. I am encountering the java heap space error, and can't find a workaround, nor a smarter way to write my code (which I am certain exist). Trying to solve Problem 14 (some spoilers might be ahead, for