Re: Clojure for financial applications

2010-03-09 Thread Konrad Hinsen
On 8 Mar 2010, at 19:22, Jonathan Shore wrote: For the sake of understanding, I'm not yet clear on how one *efficiently* binds multiple pieces of state together in clojure. How would one create a simple matrix for example where I want to bind dimension and a float-array into a tightly

Re: Clojure for financial applications

2010-03-09 Thread Konrad Hinsen
On 09.03.2010, at 14:28, Jonathan Shore wrote: Thanks. BTW, you may want to consider targeting ejml instead of colt if you are targeting dense matrix operations. ejml does quite a bit better performance-wise. Colt does support more matrix types though. Thanks for the pointer, I didn't

Re: benchmarks on a poor-man's matrix concept

2010-03-09 Thread Per Vognsen
Which is preferable depends on the nature of the changes that your matrices will undergo. For dense linear algebra, it's common for most of a matrix to change with every operation. Hence you won't reap any benefits from the persistence of Clojure's maps. The problem with your first implementation

Re: REPL in a browser

2010-03-09 Thread Jozef Wagner
Thank you. They seem to use java to generate (with GWT) both client-side html and javascript, and server-side REPL. Nice approach. I'm looking forward to the day when one will be able to do all that only with clojure :) We already have a nice clojrue web frameworks, so the only thing that is

Problem using count

2010-03-09 Thread Srini
Hi. I am completely new to clojure - my 3rd day or so. Need to go buy a book on the subject. So please help me with a couple of things: Item 1) I have two calls to count. One works, and the other does not. ; counts number of items in collection user= (count (list 1 2 3 4 er 34) ) 6 ; count does

Re: Clojure for financial applications

2010-03-09 Thread Jonathan Shore
Thanks. BTW, you may want to consider targeting ejml instead of colt if you are targeting dense matrix operations. ejml does quite a bit better performance-wise. Colt does support more matrix types though. On Mar 9, 2010, at 3:00 AM, Konrad Hinsen wrote: On 8 Mar 2010, at 19:22,

Re: Clojure Implementation issues that may affect performance?

2010-03-09 Thread jshore
Thanks The use of (int ...) works, avoiding the dispatch, but it has to be used everywhere there is a variable or literal. Starts getting very ugly and unreadable as expressions get longer.Is there any way to indicate an int or double literal short of (int 2). Here is the modified

Re: Help with Vimclojure cojure-1.2.0-SNAPSHOT

2010-03-09 Thread Mike Mazur
Hi, On Tue, Mar 9, 2010 at 22:55, Meikel Brandmeyer m...@kotka.de wrote: On Mar 9, 3:49 pm, Mike Mazur mma...@gmail.com wrote: I tried to compile Vimclojure with clojure-1.2.0-SNAPSHOT, but the latest release fails to compile with a NoSuchMethodError. Can you be more specific on the

Help with Vimclojure cojure-1.2.0-SNAPSHOT

2010-03-09 Thread Mike Mazur
Hi, I wanted to play with Stuart Sierra's lazytest[1] using Vimclojure. lazytest depends on clojure-1.2.0-SNAPSHOT (so it says in pom.xml), and my Vimclojure (compiled against an older clojure version) doesn't work when launched with clojure-1.2.0-SNAPSHOT on the classpath. I tried to compile

Re: Problem using count

2010-03-09 Thread Srini
Thank you, Meikel and Christian! - Srini On Mar 9, 7:43 am, Christian Vest Hansen karmazi...@gmail.com wrote: On Tue, Mar 9, 2010 at 6:26 AM, Srini devfac...@gmail.com wrote: Hi. I am completely new to clojure - my 3rd day or so. Need to go buy a book on the subject. So please help me with

clojure.core/compare and persistent lists

2010-03-09 Thread K.
Hello, It seems it's not possible to use the clojure.core/compare function with persitent lists : (compare '(1 2) '(3 4)) gives the following error clojure.lang.PersistentList cannot be cast to java.lang.Comparable Why don't PersistentLists implement Comparable? It works without problems for

Re: benchmarks on a poor-man's matrix concept

2010-03-09 Thread Jonathan Shore
On Mar 9, 2010, at 1:28 AM, Per Vognsen wrote: Which is preferable depends on the nature of the changes that your matrices will undergo. For dense linear algebra, it's common for most of a matrix to change with every operation. Hence you won't reap any benefits from the persistence of

Re: Clojure Implementation issues that may affect performance?

2010-03-09 Thread Chouser
On Tue, Mar 9, 2010 at 1:44 AM, Timothy Pratley timothyprat...@gmail.com wrote: On 9 March 2010 04:03, Jonathan Shore jonathan.sh...@gmail.com wrote: (defn fib [#^Integer a]   (if ( a 2)     a     (+ (fib (- a 1)) (fib (- a 2) I'm just learning, so I may have overlooked something that

Re: Clojure Implementation issues that may affect performance?

2010-03-09 Thread Stuart Sierra
On Mar 9, 8:59 am, jshore jonathan.sh...@gmail.com wrote: I suspect that on recursion a will become an object again and will then need to be downcasted again as well.   Would be nice to be able to do: (defn fib [#^int v]         (if ( v 2)                 v                 (+ (fib (- v 1))

Re: Problem using count

2010-03-09 Thread Christian Vest Hansen
On Tue, Mar 9, 2010 at 6:26 AM, Srini devfac...@gmail.com wrote: Hi. I am completely new to clojure - my 3rd day or so. Need to go buy a book on the subject. So please help me with a couple of things: Item 1) I have two calls to count. One works, and the other does not. ; counts number of

Re: Clojure Implementation issues that may affect performance?

2010-03-09 Thread Michael Wood
On 9 March 2010 15:59, jshore jonathan.sh...@gmail.com wrote: [...] (defn fib [a]        (let [v (int a)]                (if ( v (int 2))                        v                        (+ (fib (- v (int 1))) (fib (- v (int 2))) I suspect that on recursion a will become an object again

Re: Problem using count

2010-03-09 Thread Meikel Brandmeyer
Hi, On Mar 9, 6:26 am, Srini devfac...@gmail.com wrote: ; count does not work. I get an exception. Need to figure out what I am doing wrong here. user= (count (list 23 3er oel 5) ) ^^ unbalanced string ; could not get it to work for lists. apparently works

Menubar presentation on a Mac

2010-03-09 Thread WoodHacker
Hi All, Can anyone explain how I can get a traditional Mac OS menubar to appear at the top of the screen? Normally I would use (System/setProperty apple.laf.useScreenMenuBar, true) and then (.setJMenuBar ...) in my main frame. This does not appear to work. The menu shows up in the frame

Re: benchmarks on a poor-man's matrix concept

2010-03-09 Thread jshore
It looks like the new (deftype ..) may be what I am looking for in terms of binding heterogenous state efficiently. The matrix function was just a test case for how to bind state efficiently. Thanks for all of the responses. On Mar 8, 2:57 pm, Jonathan Shore jonathan.sh...@gmail.com wrote:

Re: Clojure Implementation issues that may affect performance?

2010-03-09 Thread jshore
Hmm, is there a notation to express an int literal. Better yet, clojure should try to infer that if I do (+ v 2) where v was hinted to be int, 2 should be considered to be an int. The code starts getting really messy: (defn fib [a] (let [v (int a)] (if ( v (int 2))

Re: benchmarks on a poor-man's matrix concept

2010-03-09 Thread Per Vognsen
By the way, I also noticed your logic is wrong. It should be (+ (* i ncol) j) rather than (* i j). -Per On Tue, Mar 9, 2010 at 2:57 AM, Jonathan Shore jonathan.sh...@gmail.com wrote: Hi, I'm still trying to work out the best way to deal with operations on heterogenous data in clojure.   I

Re: benchmarks on a poor-man's matrix concept

2010-03-09 Thread Jonathan Shore
On Mar 9, 2010, at 2:41 AM, Per Vognsen wrote: By the way, I also noticed your logic is wrong. It should be (+ (* i ncol) j) rather than (* i j). -Per Thanks -- I was just trying to explore how to deal with heterogeneous data. No plans to build my own matrix lib. Thanks for spotting

Re: bounded memoize

2010-03-09 Thread Meikel Brandmeyer
Hi again, On Mar 9, 8:51 am, Meikel Brandmeyer m...@kotka.de wrote:            (dissoc cache args)) And of course this is also wrong. Bleh. I will clean this up and do a short blog post this evening... Sincerely Meikel -- You received this message because you are subscribed to the Google

Re: Two potential map-util functions

2010-03-09 Thread Steve Purcell
On 8 Mar 2010, at 13:59, Luka wrote: Other thing I would like to ask is how can I see what is different in 40 github clones of clojure.contrib without clicking on every clone? Either: 1. Use the github network browser: http://github.com/richhickey/clojure-contrib/network (use

Re: Two potential map-util functions

2010-03-09 Thread cageface
On Mar 9, 12:09 am, Meikel Brandmeyer m...@kotka.de wrote: How about this? (defn leafs   ... This should be leaves, not leafs, right? Another one of those weird irregular English plurals. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to

Re: Clojure for financial applications

2010-03-09 Thread Constantine Vetoshev
On Mar 8, 11:50 am, Jonathan Shore jonathan.sh...@gmail.com wrote: How would I encapsulate this into a data structure to be passed into functions efficiently?    I could use a map of symbols to various structures, but that would be inefficient in access and memory.   I could bind into a

Re: Clojure for financial applications

2010-03-09 Thread Volkan YAZICI
On Mar 8, 8:22 pm, Jonathan Shore jonathan.sh...@gmail.com wrote: It is a shame to have to dive down to Java or native (perhaps with the exception of some of the massive numerical libraries one does not want to rewrite). I'm hoping to use Clojure or something like clojure as a complete

Re: Visual Studio plugin

2010-03-09 Thread mmwaikar
Is it possible to write a plug-in in Clojure CLR? And if it is, would you prefer it in Clojure CLR or C# is fine? Also do you want both REPL and syntax highlighting for clj files in Visual Studio? Thanks, Manoj. On Mar 8, 2:17 pm, Eric Thorsen ethor...@enclojure.org wrote: Is there/is anyone

Re: Clojure Implementation issues that may affect performance?

2010-03-09 Thread Richard Newman
I suspect that on recursion If you use plain function-calling recursion, yes. If you use (loop ... recur...) then (IIRC) locals are not boxed (as well as saving stack). Also bear in mind that JIT will come into play here; after a few tens of thousands of arithmetic ops, the common path

Re: Clojure Implementation issues that may affect performance?

2010-03-09 Thread Jonathan Shore
On Mar 9, 2010, at 1:19 PM, Richard Newman wrote: I suspect that on recursion If you use plain function-calling recursion, yes. If you use (loop ... recur...) then (IIRC) locals are not boxed (as well as saving stack). Also bear in mind that JIT will come into play here; after a few

Re: Visual Studio plugin

2010-03-09 Thread mmwaikar
Forgot to ask the below mentioned questions earlier - Which version of Visual Studio are you targeting - 2008 or 2010? Do you have a development road-map for your plug-in features? Thanks, Manoj. On Mar 9, 1:05 pm, mmwaikar mmwai...@gmail.com wrote: Is it possible to write a plug-in in Clojure

Re: clojure.core/compare and persistent lists

2010-03-09 Thread Mark Engelberg
My recollection is that when I posted this question several months ago, Rich's response was that there was no particular reason that PersistentLists don't implement Comparable, other than that it hadn't been done yet. So I assume a patch is welcome on this, but no one has stepped forward to do it

Re: symbolmacro tests fail under 1.3.2-SNAPSHOT

2010-03-09 Thread Mark Derricutt
Running late for work, but quickly, the plugin searches for namespaces and generates a run-test.clj file looking like: http://gist.github.com/326972 which is run. Interesting, just looking at that I see for some reason (require 'clojure.contrib.test-macro-utils) is duplicated (and also

Re: bounded memoize

2010-03-09 Thread Eugen Dück
I totally agree, having different eviction strategies would be great and having memoizers with max capacities in clojure.contrib would probably be useful to a lot of developers. Also, a memory sensitive memoizer (using soft references?) would be nice. :) On Mar 9, 4:51 pm, Meikel Brandmeyer

Re: apply-ing Java methods

2010-03-09 Thread Michael Gardner
On Mar 8, 2010, at 1:06 PM, Nurullah Akkaya wrote: Using this, http://paste.lisp.org/display/67182 would allow you to do, (let [config {:str fred :beg 2 :end 3}] (apply (jfn 'substring) (map config [:str :beg :end]))) That's quite nice. Thanks! -- You received this message because

Re: apply-ing Java methods

2010-03-09 Thread Michael Gardner
On Mar 8, 2010, at 11:20 PM, Michał Marczyk wrote: It's simple to write this way... And if you provide type hints, I'd expect the resulting function to be quite performant. If you don't care about that, here's a flexible alternative using eval: user (defmacro methodfn [name] `(fn [

call java main from clojure

2010-03-09 Thread TimDaly
I searched the archives and google but cannot find an example. How do I call main? packge thefoo; public class Foo { public static void main(String[] args) { System.out.println(args[0]); } } I tried (import '(thefoo Foo)) (. Foo (thefoo/main [test])) java.lang.ClassCastException:

Re: Menubar presentation on a Mac

2010-03-09 Thread igorrumiha
On Mar 9, 2:57 pm, WoodHacker ramsa...@comcast.net wrote: Hi All, Can anyone explain how I can get a traditional Mac OS menubar to appear at the top of the screen? Normally I would use  (System/setProperty apple.laf.useScreenMenuBar, true) and then (.setJMenuBar ...) in my main frame.

Re: call java main from clojure

2010-03-09 Thread Brendan Ribera
You need to turn that argument into a genuine Java array like so: (Foo/main (into-array [yay])) On Tue, Mar 9, 2010 at 1:15 PM, TimDaly d...@axiom-developer.org wrote: I searched the archives and google but cannot find an example. How do I call main? packge thefoo; public class Foo {

Re: Two potential map-util functions

2010-03-09 Thread Rick Moynihan
On 9 March 2010 08:09, Meikel Brandmeyer m...@kotka.de wrote: Hi, On Mar 8, 2:59 pm, Luka luka.stojano...@gmail.com wrote: (defn leafs [m]   (loop [vs (vals m), accum []]     (if (empty? vs)       accum       (let [v (first vs)]         (if (map? v)           (recur (rest vs) (into

Re: enclojure install killed netbeans 6.8

2010-03-09 Thread Mark Nutter
On Sun, Mar 7, 2010 at 6:44 PM, strattonbrazil strattonbra...@gmail.com wrote: I am on Linux.  I have a 6.6 and a 6.8 directory in my .netbeans folder.  6.6 still runs.  I have tried moving individual jars in and out of that dir, but I still get the error.  I even moved the entire 6.8 dir and

Re: bounded memoize

2010-03-09 Thread Meikel Brandmeyer
As threatened here a writeup. For this thread the Summary section is probably most interesting. http://kotka.de/blog/2010/03/The_Rule_of_Three.html#summary Sincerely Meikel -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send

Re: Clojure Implementation issues that may affect performance?

2010-03-09 Thread Armando Blancas
By listing the code above you've shown why the default must be so, since calling your function with any of those types will just work (at least before an stack overflow), which of course can't be done with primitive types. For an untyped language with a worry-free numeric abstraction, this seems

Re: bounded memoize

2010-03-09 Thread Michał Marczyk
On 9 March 2010 23:17, Meikel Brandmeyer m...@kotka.de wrote: As threatened here a writeup. For this thread the Summary section is probably most interesting. http://kotka.de/blog/2010/03/The_Rule_of_Three.html#summary Sincerely Meikel In the way of early feedback -- that's looks super

Re: Two potential map-util functions

2010-03-09 Thread Michał Marczyk
On 9 March 2010 22:58, Rick Moynihan rick.moyni...@gmail.com wrote: There a parity between this and clojure.contrib.seq-utils/flatten (which doesn't work with maps)...  So how about this lazy non stack consuming alternative? (defn leaves [m] (filter  (complement map?)  (rest (tree-seq map?

Clojure / Lisp Developers job listings

2010-03-09 Thread Will Fitzgerald
Hello, I maintain a (free) listing of Lisp and Clojure jobs at lispjobs.wordpress.com If you have a Clojure job you'd like to advertise, please send it to one of the addresses found on the About page: http://lispjobs.wordpress.com/about/ Will Fitzgerald -- You received this message because

Re: call java main from clojure

2010-03-09 Thread Daniel Solano Gómez
Hello, On Tue, Mar 09, 2010 at 01:15:28PM -0800, TimDaly wrote: I searched the archives and google but cannot find an example. How do I call main? packge thefoo; public class Foo { public static void main(String[] args) { System.out.println(args[0]); } } I tried (import

What's an idiomatic translation of this CL data structure?

2010-03-09 Thread Mike K
In PAIP section 2.3, Norvig gives an example of a generative grammar: ;; common lisp (defparameter *simple-grammar* '((sentence - (noun-phrase verb-phrase)) (noun-phrase - (Article Noun)) (verb-phrase - (Verb noun-phrase)) (Article - the a) (Noun - man ball woman table)

Re: What's an idiomatic translation of this CL data structure?

2010-03-09 Thread Meikel Brandmeyer
Hi, On Mar 10, 6:47 am, Mike K mbk.li...@gmail.com wrote: (defparameter *simple-grammar*   '((sentence - (noun-phrase verb-phrase))     (noun-phrase - (Article Noun))     (verb-phrase - (Verb noun-phrase))     (Article - the a)     (Noun - man ball woman table)     (Verb - hit took saw