Timo Mihaljov wrote:
I'm wondering about how to change a data structure without breaking the
API used to access it. For example, let's assume that I have a library
for dealing with records of people and I'm storing them in structs.
(defstruct person :name)
The users of my library
Hi,
2009/4/20 Timo Mihaljov noid@gmail.com
Timo Mihaljov wrote:
I'm wondering about how to change a data structure without breaking the
API used to access it. For example, let's assume that I have a library
for dealing with records of people and I'm storing them in structs.
Apologies for multiple postings
2nd European Lisp Symposium (ELS 2009)
Milan, Italy, May 27-29, 2009
Universita` degli Studi di Milano-Bicocca
www.european-lisp-symposium.org
On Apr 19, 3:20 am, Antony Blakey antony.bla...@gmail.com wrote:
If I use Clojure commercially, I'll certainly pay for it.
Please do not forget to pay for JVM, Java, Linux, tar and others.
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Laurent PETIT wrote:
While interesting, this approach seems to me limited to simple cases :
* limited in possibilities: you are not able to directly use values of
other fields. So in more complex cases, you won't be able to combine
calculated values without code repetition or prepraration
Hi,
2009/4/20 Timo Mihaljov noid@gmail.com
Laurent PETIT wrote:
While interesting, this approach seems to me limited to simple cases :
* limited in possibilities: you are not able to directly use values of
other fields. So in more complex cases, you won't be able to combine
Laurent PETIT wrote:
What do others think about these 2 above statements ?
The standard OO approach to information hiding would be private fields
and accessor methods. Any suggestions for the One True Clojure Pattern
that addresses the same problem?
I think accessor
Okay, I'm willing to bet this crowd has already seen this:
http://www.sun.com/third-party/global/oracle/index.jsp
Any thoughts on how this affects Clojure?
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On Mon, Apr 20, 2009 at 9:13 AM, Sean Devlin francoisdev...@gmail.com wrote:
Okay, I'm willing to bet this crowd has already seen this:
http://www.sun.com/third-party/global/oracle/index.jsp
Any thoughts on how this affects Clojure?
No effect.
--
blog: whydoeseverythingsuck.com
Hi all, I have the following code that trains a perceptron with the
given inputs and corresponding desired inputs. For input/output
vectors, when the size gets to about 2000, I am getting a
java.lang.StackOverflowError in the following function:
(defn trainPerceptron [beginningWeightVector
You have two other function calls
getAdaptedWeightVector
computeActualResponse
Are these recursive as well?
On Sun, Apr 19, 2009 at 11:26 PM, jleehurt jleeh...@gmail.com wrote:
Hi all, I have the following code that trains a perceptron with the
given inputs and corresponding desired inputs.
I guess I should have stated my initial concern better. I've had to
use several Oracle products in the past (PL/SQL 9i), and they
weren't developer friendly. I'm worried about the JVM becoming less
open than it currently is. I can see a lot of technologies that drive
the open source world,
Maybe I'm missing something, but what is wrong with Stuart Sierra's
solution? I quite like it, and it would probably be more appealing if
it were encapsulated into a macro.
(def-propholder person)
(def me (person {:name Matt Clark}))
(def-propholder person2
:name
{:getter (fn [record]
On Apr 20, 12:32 pm, Laurent PETIT laurent.pe...@gmail.com wrote:
I think you Timo ask here a very interesting and important question.
It's not just about having encapsulation or not. It's really about designing
the code so that the library internals can evolve without impact on the user
Stuart Sierra the.stuart.sie...@gmail.com writes:
On Apr 20, 1:48 pm, Rich Hickey richhic...@gmail.com wrote:
I imagine a (clojure-version) function returning:
{:major 1 :minor 0 :release 0}
I'd suggest calling :release something else, like :revision
or :patch. release sounds like a
Konrad added an early implementation of abstract data types to
clojure-contrib (types.clj) you might want to check that out.
I also did some work on supporting more traditional style OO with Spinoza
(structural+behavioral inheritance), but I've sidelined it for the time
being until I find that I
On 20.04.2009, at 20:00, Timo Mihaljov wrote:
Is the concept of Abstract Data Types [1] useful in Clojure?
Yes, although the abstraction is necessarily leaky in that you cannot
enforce it in the absence of static typing.
If yes, how would you implement one?
Like in any other language: by
2009/4/20 Stuart Sierra the.stuart.sie...@gmail.com
On Apr 20, 1:48 pm, Rich Hickey richhic...@gmail.com wrote:
I imagine a (clojure-version) function returning:
{:major 1 :minor 0 :release 0}
I'd suggest calling :release something else, like :revision
or :patch. release sounds like a
2009/4/20 Rich Hickey richhic...@gmail.com:
If there is just a (def *version* {:major 1 :minor 0 :release 0})
my questions are:
What happens after release to keep subsequent interim versions from
having the same 'version' as a release? Should we have a :status
attribute that is :release
Hi David,
2009/4/20 David Nolen dnolen.li...@gmail.com:
A couple of things. In your initial example, you conflated some things. One
issue is simply a matter of convenience- defining a getter so that you can
use Python object property access (via the dot operator). Personally I don't
like
Using something like this run-slime wrapper to start slime may be
useful to others. It helps me avoid some issues when moving from
project to project without restarting emacs. Assuming jar files reside
in each separate project's own lib directory, Clojure source in its
src directory, and compiled
On Mon, Apr 20, 2009 at 1:27 PM, Bradbev brad.beveri...@gmail.com wrote:
If you promise that
functions will accept and return maps with certain keys, then you must
keep that promise moving forward.
I think you're missing part of the point of the original post. You
don't really want to
On Mon, Apr 20, 2009 at 1:59 PM, David Nolen dnolen.li...@gmail.com wrote:
Maps aren't ordered so this isn't a good idea anyway.
It's a good idea if you have a sorted map. My example should have used
sorted-map.
The reason first/second work is because they call seq on the collection.
(key
On Apr 5, 1:32 pm, dlb d...@davidlballenger.com wrote:
I have the same problem on my Mac as well, i.e. if clojure.jar is
loaded from ~/Library/Java/Extensions rather than from the classpath,
then clojure does not find files on the classpath. I did some poking
around and on my Mac OS X 10.5.6
Has anyone here been able to install Clojure on IcedTea?
For what it's worth, I run Clojure on SoyLatte and have never had a
problem.
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To post to this
Is it possible to use :while to shortcut a for macro when a certain number of
yiels have happened?
e.g. (for [x (range 1000) :when (= (rem x) 1) :while (number of yields = 10)]
so i want only the first 10 results.
Or should I just use (take 10 ) on the for ?
Michael
In my Clojure article at http://ociweb.com/mark/clojure/article.html I say:
Clojure code is processed in three phases: read-time, compile-time
and run-time. At read-time the Reader reads source code and converts
it to a data structure, mostly a list of lists of lists At
compile-time this
Hello,
Apparently, no:
1:85 user= (macroexpand-1 '(defn hello [] world))
(def hello (clojure.core/fn ([] world)))
1:86 user= (read-string (defn hello [] \world\))
(defn hello [] world)
1:87 user=
read-string did not expand defn.
I think it's 'eval that expands macros and compiles forms.
I didn't explain my question well enough. Suppose I define a macro
with defmacro and have several calls to it in my code. When are those
calls expanded to the code inside the macro? Is that at read-time?
On Mon, Apr 20, 2009 at 5:34 PM, Laurent PETIT laurent.pe...@gmail.com wrote:
Hello,
Hi Mark,
Am 21.04.2009 um 00:40 schrieb Mark Volkmann:
I didn't explain my question well enough. Suppose I define a macro
with defmacro and have several calls to it in my code. When are those
calls expanded to the code inside the macro? Is that at read-time?
As Laurent said: No. Macro
2009/4/21 Mark Volkmann r.mark.volkm...@gmail.com:
I didn't explain my question well enough. Suppose I define a macro
with defmacro and have several calls to it in my code. When are those
calls expanded to the code inside the macro? Is that at read-time?
Maybe the example I gave (by using
But reader macros *are* expanded at read-time (as their name
indicates, BTW) :
1:91 user= (read-string 'quoted-symbol)
(quote quoted-symbol)
1:92 user=
HTH,
--
Laurent
2009/4/21 Laurent PETIT laurent.pe...@gmail.com:
2009/4/21 Mark Volkmann r.mark.volkm...@gmail.com:
I didn't explain my
On 21/04/2009, at 5:12 AM, Laurent PETIT wrote:
To give you more ideas, there is a convention in tools like maven/ivy
that when you're starting the hack on a branch targeting some version
M.m.r , you immediately rename the place in code where you maintain
the version number by appending the
On Apr 20, 4:17 pm, Mark Engelberg mark.engelb...@gmail.com wrote:
On Mon, Apr 20, 2009 at 1:27 PM, Bradbev brad.beveri...@gmail.com wrote:
If you promise that
functions will accept and return maps with certain keys, then you must
keep that promise moving forward.
I think you're
Laurent PETIT wrote:
I'd suggest calling :release something else, like :revision
or :patch.
I like the term service used in Eclipse terminology:
the service segment indicates bug fixes
(The numbering scheme for Eclipse uses major, minor, service and
qualifier : the qualifier segment
As far as I know the number of yields is not available for testing, so
you have to use take
user= (take 10 (for [x (range 1000) :when (= (rem x 2) 1)] x))
(1 3 5 7 9 11 13 15 17 19)
On Apr 21, 8:19 am, Michael Hunger cloj...@jexp.de wrote:
Is it possible to use :while to shortcut a for macro
On Mon, Apr 20, 2009 at 6:12 PM, Greg Harman ghar...@gmail.com wrote:
Has anyone here been able to install Clojure on IcedTea?
For what it's worth, I run Clojure on SoyLatte and have never had a
problem.
I never had any problem on IcedTea.
On Apr 20, 2009, at 7:02 PM, Antony Blakey wrote:
On 21/04/2009, at 5:12 AM, Laurent PETIT wrote:
To give you more ideas, there is a convention in tools like maven/ivy
that when you're starting the hack on a branch targeting some version
M.m.r , you immediately rename the place in code
On 21/04/2009, at 10:22 AM, Rich Hickey wrote:
I'm unfamiliar with the POM version coordinate system - any hints?
My comment was in support of Laurent's proposal. I'm a relative maven
newb, but this is my take:
POMs use the concept of a coordinate, which is
On 21/04/2009, at 10:51 AM, Antony Blakey wrote:
On 21/04/2009, at 10:22 AM, Rich Hickey wrote:
I'm unfamiliar with the POM version coordinate system - any hints?
My comment was in support of Laurent's proposal. I'm a relative
maven newb, but this is my take:
POMs use the concept of a
Rich Hickey wrote:
I'm unfamiliar with the POM version coordinate system - any hints?
Maven takes the version as whatever-formatted string, but recognizes a
conventional (.endsWith 1.0.0-SNAPSHOT -SNAPSHOT), like described
by Laurent PETIT. So whatever-SNAPSHOT means we're going someday to
For a 1.0 release I'd love to see some support for JDK annotations
somehow, at both the gen-class and method level at least.
Mark
On Fri, Apr 17, 2009 at 4:53 AM, Rich Hickey richhic...@gmail.com wrote:
This is mostly about - does it work? Is it relatively free of bugs? Is
it free of gaping
In my application, I can open several windows. Each window is an
independent unit and will send-off three agents to do background work.
When I close a window, I stop the three threads from running, but the
thread count never goes down when I display it by (println Thread
count is
On Apr 20, 2:17 pm, Mark Engelberg mark.engelb...@gmail.com wrote:
On Mon, Apr 20, 2009 at 1:27 PM, Bradbev brad.beveri...@gmail.com wrote:
If you promise that
functions will accept and return maps with certain keys, then you must
keep that promise moving forward.
I think you're missing
It would be fun to have a team of clojure programmers work on the ICFP '09
contest. Has this been done previously? Anybody interested? I'm new to
clojure and to lisps in general, but have a pretty good grasp of functional
programming (mostly from haskell). It would be great fun to work with some
Hi David,
Those two are not recursive, but they call into other recursive
functions. Do I need to make sure all recursive functions use the loop/
recur pattern? Or maybe not nest recursive calls like this?
Here is the whole source:
;threshold
(defn threshold [x] (if (= x 0) 1 0))
;signum
Hi David,
Those two are not recursive, but they call into other functions that
are. Do I need to make sure that all recursive functions use the loop/
recur pattern? Or should I not nest recursive calls like this?
Here is the whole source:
;; Neuron Activation Functions
;threshold
(defn
I posted this a couple of weeks ago and haven't seen it updated on the
clojure
website. Maybe it got lost in the shuffle.
Name: clj-web-crawler
URL: http://github.com/heyZeus/clj-web-crawler/tree/master
Author: Brian Doyle
Categories: Web, Automation
License: MIT
Dependencies: clojure,
Daniel,
I have not followed maven2 concerning this qualifier thing.
Would it be corrrect to say that, to further extend you examples, one
the qualifiers could be slim, since clojure ant already has such a
target.
Or would a slim jar of clojure have to had another artifactId ? (I
don't think
I can see a lot of technologies that drive the open source world, and this
group, being compromised
Nothing's going to happen, for the simple reason that the cost to
Oracle's reputation would far outweigh anything they might gain from
charging for open-source products. The ultimate effect
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