you should look into float-array and friends.
On Fri, Apr 3, 2009 at 12:04 AM, Sean wrote:
>
> I'm working with AWT, and there is a method that requires a float[]
> (The java.awt.BasicStroke constructor). Is it possible to directly
> create an array of primitives directly in Clojure, or do I ne
I'm working with AWT, and there is a method that requires a float[]
(The java.awt.BasicStroke constructor). Is it possible to directly
create an array of primitives directly in Clojure, or do I need to
create a utility class in Java?
--~--~-~--~~~---~--~~
You recei
Maven2 is atrocious for big Java projects. Lots of people have had
the same experience you mentioned. In fact the first few lines of the
readme on my clojure pom project on github says "Dont run away with
your hair on fire" :) Give it a try. It is really simple.
I think I'll give Ant + Ivy anoth
On Tue, Mar 31, 2009 at 8:17 PM, Laurent PETIT wrote:
> Yes, you're certainly right, but I'm only 35 old, and I don't want to yet
> let my dreams behind me, given that I will certainly (I hope so!) play at
> least 35 more years in this industry :-)
>
> I was thinking about an approach that would l
I said that the java world has rallied around maven _repos_.
Ivy uses maven repos. So your 200 developers _have_ in fact embraced
maven repos like most people. It is the only package repository game
in town. :)
I think Ant + Ivy is a very nice solution for Java. If there was a DRY
way to adapt i
Hi Geoff,
You should have no trouble using setAccessible. There are several
demos of this in the source code for the book [1] that use
setAccessible to check private fields in a unit test. (See lancet/test/
step-2-complete.clj [2], for instance).
Hope this helps,
Stu
[1] http://github.com
Thanks for the response everyone! I was able to get it working. If I
understand what everyone is saying, the following statement is true:
In Clojure, laziness is the rule not the exception.
On Apr 2, 10:29 pm, Matt Revelle wrote:
> Were you in #clojure earlier? This came up there and pjsta
Were you in #clojure earlier? This came up there and pjstadig and I
raced to implement "domap" and then slashus2 pointed out there was no
need for it to be a macro.
http://gist.github.com/89249
(defn domap
"A map for side-effects. The argument order is the same as map, but
unlike map the fun
As far as I know, there is no limit.
On Apr 2, 11:22 am, Geoff Wozniak wrote:
> What are the limitations of Clojure and Java interoperability? Are
> they clearly stated somewhere?
>
> I have been experimenting with using Clojure to test some existing
> Java code (being able to do so makes a conv
Daniel Jomphe wrote:
> Basically, since your map wasn't needed, it wasn't "realized"/
> executed. Laziness.
Better said:
Basically, since your map's results weren't used, it wasn't
"realized"/
evaluated. That's why you didn't see your expected side effects.
Laziness.
--~--~-~--~~
yeah I definitely agree that it would be nice if constants could be
used without the parens.
On Apr 2, 11:48 am, Paul Stadig wrote:
> Yeah that works the same as defining a function, just more explicit. I was
> looking for a way to define a constant and just use it as "my-const" without
> having
>From map's docstring: "Returns a lazy sequence [...]"
So I guess you applied map at the top level and wondered why side-
effects didn't happen.
Try:
(dorun (map #(form-with-side-effects %) a-list))
Or, for fun:
(take 1 (map #(form-with-side-effects %))
Basically, since your map wasn't n
nifty :)
On Apr 2, 5:10 pm, Raffael Cavallaro
wrote:
> If you change the color constructor you can get some nice color
> effects:
>
> (. setColor (let [scaled (Math/round (* value color-scale))]
> (Color. 255 (- 255 scaled) scaled)))
>
> will give you yellow and magenta fo
Hi everyone,
I'm working with awt to do create an image renderer. This is
obviously an application where side effects are desired. My first
attempt was this:
(map #(form-with-side-effects %) a-list)
This didn't do what I expected. After a little while, I found the
doseq macro. I re-wrote my
Let's say I have this file to parse:
Québécois français
I spent many hours trying different ways of doing it, but still
haven't found one. Here are probably my best attempts:
(def n "ISO-8859-1")
(defmacro with-out-encoded [encoding & body]
`(binding [*out* (java.io.OutputStreamWr
Hi,
At ILC 2009, O'Reilly Media released a statement that they were
soliciting proposals for books about Lisp. This is a reversal of their
previous policy that explicitly stated that they were not interested
in publishing Lisp books. I'm planning to put together a proposal for
a book about web de
On Fri, Apr 3, 2009 at 4:39 AM, dysinger wrote:
> The Java world for good or bad has rallied
> around maven repos. There are 10s of thousands of libs "up in there".
While there are lots of Java / Maven users, there are also a lot who *don't*
use it, and indeed many who actively avoid stuff tha
You're doing amazing work! I look forward to the result.
On Thu, Apr 2, 2009 at 5:37 PM, Paul Stadig wrote:
> I've been speaking with the Terracotta engineers, so here is an update on a
> couple of the issues:
>
> 1) array.clone(). It turns out this is a bug in Terracotta. They have
> acknowled
It's not hard to add a pom.xml to a project that is not maven
enabled. I did it for clojure and clojure-contrib in 2 minutes
total. If it's a git project you can just include them in as a
submodule (or ftree in hg or svn externals in svn) and setup up multi-
module builds.
Clojure "Ties" would
Hello,
2009/4/2 Jason Sankey
>
> Laurent PETIT wrote:
> > Hi,
> >
> > 2009/4/2 Jason Sankey mailto:ja...@zutubi.com>>
> >
> > Ivy [ ... ] also supports pluggable resolvers, so
> > you can host your Jars/dependency information in multiple ways.
> >
> >
> > Does that mean one could write r
I've been speaking with the Terracotta engineers, so here is an update on a
couple of the issues:
1) array.clone(). It turns out this is a bug in Terracotta. They have
acknowledged it, and will be working to resolve it. However, they mentioned
(as I have found else where on the interweb[1][2]) tha
Laurent PETIT wrote:
> Hi,
>
> 2009/4/2 Jason Sankey mailto:ja...@zutubi.com>>
>
> Ivy [ ... ] also supports pluggable resolvers, so
> you can host your Jars/dependency information in multiple ways.
>
>
> Does that mean one could write resolvers to automagically get libraries
> from "
If you change the color constructor you can get some nice color
effects:
(. setColor (let [scaled (Math/round (* value color-scale))]
(Color. 255 (- 255 scaled) scaled)))
will give you yellow and magenta for example
--~--~-~--~~~---~--~~
You
It seems to me that the real solution is that the Clojure compiler
needs to support global constants. You could probably emulate the
behaviour by rebinding global vars inside the let though.
(def *foo* 100)
(defn bar []
(let [foo *foo*]
...))
Brad
On Apr 2, 7:57 am, Paul Stadig wrote:
> I
Hi,
2009/4/2 Jason Sankey
> Ivy [ ... ] also supports pluggable resolvers, so
> you can host your Jars/dependency information in multiple ways.
>
Does that mean one could write resolvers to automagically get libraries from
"source" repositories such as github, bitbucket, ... (as long as a minim
What are the limitations of Clojure and Java interoperability? Are
they clearly stated somewhere?
I have been experimenting with using Clojure to test some existing
Java code (being able to do so makes a convincing argument to use it
where I work) and I've noticed that there doesn't seem to be an
Embracing Maven may sound like madness for a dynamic language when you
are trying to break free from Static Languages Land. There _ARE_
compelling arguments for using simple maven pom files though.
1 - You get access to repository managers like http://archiva.apache.org/
2 - You get access to a
Paul Stadig wrote:
> This works great for Java libraries, but only libraries that are in a
> maven repo. How hard is it to get code into a repo? What about java
> libraries not in a maven repo, or clojure code like clojure-json on GitHub?
I don't think it is terribly hard to get in the repo, bu
Comments below mixed in...
On Apr 2, 3:35 am, Paul Stadig wrote:
> This works great for Java libraries, but only libraries that are in a maven
> repo. How hard is it to get code into a repo? What about java libraries not
> in a maven repo, or clojure code like clojure-json on GitHub?
>
You can
This approach won't get you very far IMHO working on lots of
projects. At some point you will have conflicts on which library
version you need.
On Apr 1, 8:29 pm, mikel wrote:
> On Apr 2, 12:27 am, dysinger wrote:
>
>
>
> > Dogh! Plz pardon my spelling. :D (embarrassed)
>
> > On Apr 1, 7:25 p
Stuart Sierra wrote:
> On Apr 1, 12:21 pm, Jason Sankey wrote:
>> Out of interest, are you interested in other output formats for test-is?
>> I chose JUnit compatible as a defacto-standard -- it integrates with
>> the unofficial build server I have been working on as well as many other
>> tools
On Apr 1, 11:41 am, Chanwoo Yoo wrote:
> Hello. Yesterday, I talked with a representative of a publisher about
> a translation of Lisp books. There are books about Ruby, Lua, Erlang,
> and Groovy in South Korea, but there is no book about Lisp except
> SICP. So he is considering printing the fi
Yeah that works the same as defining a function, just more explicit. I was
looking for a way to define a constant and just use it as "my-const" without
having to use the parens to call a function or a macro. I guess that would
be something like a symbol macro in CL?
Paul
On Thu, Apr 2, 2009 at 1
There is definline which seems appropriate in place of the constant
macros.
(definline my-const [] 1)
(my-const) ;= 1
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To post to this group, send ema
I think you are right, Brad.
However, I wonder though if there is a better way to define a constant.
Neither the macro nor function seems clean. I like David's
wrapping-the-whole-thing-in-a-let, but what if you wanted to access the
value of "width" in a different file? Would one have to resort to
It would seem that macros in this case should not be required. A
normal function that simply returns a constant should get inlined by
the JIT.
Cheers,
Brad
On Apr 2, 5:20 am, Dmitri wrote:
> Thanks a lot, that's really helpful. I never thought of using a macro
> to define constants
> like that
Oh, yes. It actually replaces dashes. Never mind. :)
Ilya
2009/4/2 Daniel Jomphe
>
> Oh, that's it. I think I fiddled with this last week. :\
>
> So now, I've got these working:
>
> eclipse, intellij
>
> -- NetBeans --
> enclojure still complains contrib isn't on the classpath, whatever I
> do
Daniel,
How have you added clojure-contrib.jar to your module? The most common way
to do this is to create global/project/module library, attaching this jat to
it and adding this library to module dependencies. If it doesn't help, could
you provide little example to reproduce it? I guess, this is
Oh, that's it. I think I fiddled with this last week. :\
So now, I've got these working:
eclipse, intellij
-- NetBeans --
enclojure still complains contrib isn't on the classpath, whatever I
do.
-- Emacs --
No more works since I've pulled emacs-starter-kit's latest changes. 'M-
x slime' does
This works great for Java libraries, but only libraries that are in a maven
repo. How hard is it to get code into a repo? What about java libraries not
in a maven repo, or clojure code like clojure-json on GitHub?
1. You could set up your own repo. Ok. Cool, but not the easiest to setup
and mainta
in order to be compatible with package and java class names, your clojure
files must not have the - , so clojure automatically replaces them with
underscores _ when searching for a file / folder / package fragment.
But inside clojure itself, when you reference the namespace by its
symbol/name, you
Thanks to everybody for their (sometimes highly detailed) answers.
-- ECLIPSE --
It's nice that contrib is indeed bundled in clojuredev. Core clojure
works, but I get the following:
(ns myns
(:use clojure.contrib.duck_streams))
==> [...].Exception: namespace 'clojure.contrib.duck_stre
That did it! I just used the functions that created my-row-data in
place of my-row-data. Thanks very much for the help.
PJ
On Apr 2, 1:34 pm, Laurent PETIT wrote:
> Difficult without seeing the code.
>
> the idea is to try not storing what is currently in my-row-data anywhere.
>
> So if you can
Difficult without seeing the code.
the idea is to try not storing what is currently in my-row-data anywhere.
So if you can create a function that returns what is currently stored in
my-row-data, and pass that function to your function t, then the head of
your sequence will not be retained in any
Apologies for my ignorance ,i am new to clojure, but can you give an
example of what the code should look like. I understand my-row-data is
lexical as it defined outside the function but i don't understand how
to implement this new function.
tks,
PJ
On Apr 2, 1:03 pm, Laurent PETIT wrote:
> You'
Thanks a lot, that's really helpful. I never thought of using a macro
to define constants
like that, it's definitely a good trick and it does seem to result in
the biggest performance
gain.
On Apr 2, 7:25 am, Paul Stadig wrote:
> I got it down to about 3 seconds. I did what William said, but the
On Apr 2, 2009, at 2:05 AM, MikeM wrote:
>
> Starting with your version, I got about a 2x improvement with the
> following:
>
> (defn check-bounds [x y]
>(let [f2 (float 2.0)
> f4 (float 4.0)]
>(loop [px (float x)
> py (float y)
> zx (float 0.0)
> z
like Paul said earlier changing the globals to macros makes seems to
make a huge impact.
and the check-bounds and draw-line get called for each line on the
screen so it makes sense
that optimizations there will make a big impact.
On Apr 2, 8:05 am, MikeM wrote:
> Starting with your version, I go
Starting with your version, I got about a 2x improvement with the
following:
(defn check-bounds [x y]
(let [f2 (float 2.0)
f4 (float 4.0)]
(loop [px (float x)
py (float y)
zx (float 0.0)
zy (float 0.0)
zx2 (float 0.0)
zy2 (float 0.0
You're holding the head, because my-row-data is defined in the lexical or
dynamic scope of the function, and holds the head.
Try creating a function returning the seq that is currently stored in
my-row-data and call it instead : (my-row-data)
--
Laurent
2009/4/2 fitzpatrick...@googlemail.com
thanks a lot, that's really helpful.
On Apr 2, 7:25 am, Paul Stadig wrote:
> I got it down to about 3 seconds. I did what William said, but the biggest
> improvement was from changing the way *width*, *height*, and *max-steps*
> were defined. I noticed that in the Java version they are constants
Hi,
Thanks for the replies.
I have adapted the code above with my example. I still get the heap
error!
my-row-data is the lazy sequence. each element in the seq is a 2
element vector of Java String[]
output-array is just a printing function for the String[]. For
convenience i place a @ between th
i didn't know about this one. thanks
On Thu, Apr 2, 2009 at 4:51 AM, Rayne wrote:
> La Clojure
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To post to this group, send email to clojure@googlegr
I got it down to about 3 seconds. I did what William said, but the biggest
improvement was from changing the way *width*, *height*, and *max-steps*
were defined. I noticed that in the Java version they are constants, but in
the Clojure version they are Vars which means that inside your tight inner
On Thu, Apr 2, 2009 at 11:58 AM, fitzpatrick...@googlemail.com
wrote:
>
> Hi,
> I am attempting to print a large lazy seq to file. I have attempted
> various approaches and obviously am missing something obvious.
> I have attempted do use do-seq and also iterated manually through the
> sequence b
e.g. the following code works very well for me (so I had to stop it before
the file size became > to 1 Gbyte :-) :
;; file test.clj
(ns test)
(defn infinite [] (repeat "a line"))
(defn t []
(with-open [w (java.io.FileWriter. (java.io.File. "/tmp/test"))]
(doseq [l (infinite)]
Can you post the code that poses problem ?
2009/4/2 fitzpatrick...@googlemail.com
>
> Hi,
> I am attempting to print a large lazy seq to file. I have attempted
> various approaches and obviously am missing something obvious.
> I have attempted do use do-seq and also iterated manually through the
Hi,
I am attempting to print a large lazy seq to file. I have attempted
various approaches and obviously am missing something obvious.
I have attempted do use do-seq and also iterated manually through the
sequence but i always come up with the heap error.
Has anyone got any suggestions?
tks,
PJ
--
I already have this function. It's called channel #Clojure on
freenode :p. All I got to do is wave my magic wand at hiredman and
CLABANGO!.
On Apr 1, 8:17 pm, Mitch wrote:
> While still learning clojure, I often times need a function and am not
> sure if it already exists or where to look for it
On Thu, Apr 2, 2009 at 2:33 AM, Luke VanderHart
wrote:
>
> Ugh, I hate it when I make a fool of myself and realize the answer to
> a question 1 minute after posting it, even when wrestling with it for
> an hour beforehand...
>
> The reason the example doesn't work is that the method is of a
> dif
Every one of those IDE's work with adding stuff like Clojure-contrib
to the classpath. In La Clojure, it's as simple as going to File ->
Project Structure -> Libraries -> Attach Classes and finding the
correct directory of Clojure-contrib. In Enclojure, it's as simple as
right clicking Libraries i
Referring to http://clojure.org/refs :
Rule 1. states that all your reads will be consistent as of the starting
point of the transaction
Rule 2. states that no changes will have been made by any other transactions
to any Refs that have been *ref-set**/altered**/ensured* by this
transaction.
So by
Hmm - I'm unclear. I had the impression that if thread a *reads* ref
"world" and thread b *alters* ref "world" that would cause one of them to
retry... is that wrong? It probably doesn't matter to my code, but it'd be
good to know.
- Korny
On Thu, Apr 2, 2009 at 6:11 PM, Laurent PETIT wrote:
>
Hi,
2009/4/1 Daniel Jomphe
>
> Would you fellow clojurians have wise advice for me? While I await
> your answers, I'm going to try eclipse. I think I've read Laurent
> Petit, the other day, saying his eclipse plugin automatically handles
> classpaths.
>
Indeed, with clojuredev, initializing a n
Hello,
2009/4/2 Korny Sietsma
>
> If I understand correctly, two threads calling do_something_to with
> different keys won't collide, as they read @world but don't change it. I'll
> get a collision if one thread changes @world and another changes an
> individual structure - but I guess that's n
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