On Dec 12, 11:20 am, Scott wrote:
> Trying to learn clojure via some simple examples.
>
> I would like to use a simple glob expression to open a file using read-
> line
>
> How would I write the equivalent of:
>
> (for [line (read-lines "*.txt")]
> (print line))
>
> Where *.txt would match o
hi,
> 2. In my mind, the single most important use of OO is polymorphism.
> The ability to associate functions with multiple implementations
> depending on their parameters is very useful since it means you can
> generalize algorithms without having to know the implementation
> details of the data
On Dec 12, 9:21 am, Joost wrote:
> * Inheritance is overrated. it tends to be abused as a way to share
> implementation details more than anything else. All the points I made
> about interfaces also apply to inheritance. See also traits, for a way
> to really do reuse:http://scg.unibe.ch/researc
Adrian's comments are spot on, and they can be a bit intimidating to a
newcomer. Let me offer a piece of encouragement.
There's an interesting result from the way Clojurians code as
described above. Every once in a while, someone will do something so
radically brilliant with the built in construc
> This is not meant to be patronising, but I think it does speak to the
> problem of "disjoint" between experienced Clojure/Lisp'ers and noobs
> learning the language. They tend to code as above, but when trying to
> help people who are learning, they try to bridge the (imperative) gap
> by breakin
> (reduce (fn [model f] (assoc model f (inc (get model f 1
>{} features))
> Do Clojurians usually arrange like that? Can it be rearrange for more
> understandability?
I would write it exactly like that. What happens as you become
familiar with Clojure is that the patterns of the api b
If it's a java project, then you can just select the jars, right-
click, choose Build Path > Add to Build Path. You can also do it
through Project > Properties >Java Build Path.
On Dec 12, 6:32 pm, rebcabin wrote:
> I got a lot closer thanks to the great hints above; the current state
> is this
I got a lot closer thanks to the great hints above; the current state
is this
C:\usr\local\bin>java -cp clojure-1.0.0.jar;clojure-contrib.jar;j3d-
core-1.3.1.j
ar;j3dcore-ogl.dll;vecmath.jar;j3dutils.jar;j3dcore-d3d.dll
clojure.lang.Repl
Clojure 1.0.0-
user=> (load-file "/Users/Reb/workspace/2dplo
Thanks Alex! I like the approach of using get-in/assoc-in/update-in
much better than using a zipper. I'll go read the api documentation
on those...
Thanks again.
On Dec 12, 4:36 pm, "Alex Osborne" wrote:
> "Alex Osborne" writes:
> > (-> (map-zip {:foo {:bar {:baz 2}}})
> > zip/down
> >
Michael Wood writes:
> I don't think boolean-array exists in 1.0. Try this instead:
>
> user=> (into-array Boolean [true true false true])
> #
>
> although that gives you an array of Booleans instead of booleans.
(into-array Boolean/TYPE [true false])
;; => #
--
You received this message beca
Thanks Tim! I've put together an experimental build of Incanter using
the new builds:
http://groups.google.com/group/incanter/browse_thread/thread/94b30744fee1095e
I ran into a minor issue with Clojure's new branch that I was able to
work around but couldn't diagnose (more details in the linked p
Cleaned it up a bit:
(defmacro ? [object value]
"Get an object value - same as object.value; in C# but immutable"
`(get ~object (keyword (str '~value
(defmacro ! [object method & args]
"Call an object method - same as object.method(args); in C# but
immutable"
`
There is nothing "wrong" about objects in Clojure as long as the
objects are immutable.
Some people tend to think that "functional" is anti-"object oriented".
That is IMHO the wrong way to think. They complement each other. Why
limit the tools in your toolbox? F# (for example) shows how it can be
"Alex Osborne" writes:
> (-> (map-zip {:foo {:bar {:baz 2}}})
> zip/down
> zip/down
> (zip/insert-right [:greeting "Hello!"])
> zip/down
> (zip/edit (val-editor inc))
> zip/root)
>
> ;; => [:root {:foo {:greeting "Hello!", :bar {:baz 3}}}]
I should also probably point out
Paul_B_Hansen writes:
> I tried to simply get a zipper working for nested
> maps but I didn't succeed. My attempt is below:
>
> (defn map-zip [root]
> (zip/zipper map?
> seq
> (fn [node children] (with-meta (hash-map children) (meta
> node)))
> root))
Mike K writes:
> All,
>
> I tried to use this script on Windows and it blew up real good! I'm a
> Clojure, Java, and Leiningen newbie, so perhaps a kind soul can help
> me out.
>
> 1. lein self-install "worked". It downloaded leiningen-1.0.0-
> standalone.jar. However, that contradicts the de
I created addition pairs of maven snapshot CI builds for clojure &
contrib.
Repository : http://build.clojure.org/snapshots
"master":
org.clojure:clojure:1.1.0-master-SNAPSHOT
org.clojure:clojure-contrib:1.1.0-master-SNAPSHOT
"new"
org.clojure:clojure:1.1.0-new-SNAPSHOT
org.clojure:clojure-cont
Hi
2009/12/12 ajay gopalakrishnan :
> Hi,
>
> I come from a OOPS (Java) world and I am used to Singletons, Inheritance,
> Statics, Interfaces etc.
> I am reading the Programming Clojure book and I understand multi-methods and
> when it is used.
> But I am still not able to see how to achieve the e
@Joost ,
Excellent Description. Of the sort that I was really hoping for! Indeed a
heavy meal to digest, for an OOP person, but I see your point.
Thanks!
Ajay
On Sat, Dec 12, 2009 at 12:21 PM, Joost wrote:
> On 12 dec, 14:13, ajay gopalakrishnan wrote:
> > Hi,
> >
> > I come from a OOPS (Java)
Trying to learn clojure via some simple examples.
I would like to use a simple glob expression to open a file using read-
line
How would I write the equivalent of:
(for [line (read-lines "*.txt")]
(print line))
Where *.txt would match only the first file found in the present
working directo
I could not get the python script to work, so I switched to the
powershell version.
I now understand that the leiningen-1.0.0-SNAPSHOT.jar is a so-called
"uberjar" and contains all the dependencies for leiningen.
However, the python script assumes clojure is from a separate jar
which is not insta
2009/12/12 rebcabin :
> Well, the 3d test applications from https://j3d-webstart.dev.java.net/test/
Java Webstart works differently to something run from the command
line. When you click on the link it downloads a .jnlp file that, I
believe, mentions all the dependencies.
> work correctly and ev
I think referring to clojure as a multiparadigm languge is incorrect.
---
Joseph Smith
j...@uwcreations.com
(402)601-5443
On Dec 11, 2009, at 3:04 PM, kusi wrote:
> http://kusimari.blogspot.com/2009/12/analysing-clojure-programming-language.html
>
> --
> You received this message because you
On 12 dec, 17:29, Sean Devlin wrote:
> First, is the STM. This is THE killer feature of the language.
> Ironically, it gives Clojure its identity, and ridiculously clean
> design. Write a concurrent app with it and you'll see.
For me, it's not even the STM that's so compelling about clojure -
i
The linked article is poorly researched and incorrect starting at the
very first sentence. I hope that the author will have time to do a
more in-depth exploration of Clojure and make some modifications.
If you are looking for accurate introductory information on Clojure, I
would recommend:
The boolean-array function is new in 1.1
Sean
On Dec 12, 12:37 pm, Michael Wood wrote:
> 2009/12/12 Amol Dharmadhikari :
>
>
>
>
>
> > Hi All,
>
> > Apologies for a newbie question:
>
> > I am trying to invoke some java libraries from clojure and some of the
> > methods take boolean arrays as th
2009/12/12 Amol Dharmadhikari :
> Hi All,
>
> Apologies for a newbie question:
>
> I am trying to invoke some java libraries from clojure and some of the
> methods take boolean arrays as their parameters.
>
> The documentation
> (http://richhickey.github.com/clojure/clojure.core-api.html#clojure.co
On Sat, Dec 12, 2009 at 10:57 AM, Daniel Werner
wrote:
> On Dec 10, 3:10 pm, Rich Hickey wrote:
>> I'm happy to announce I have implemented this fine-grained locals
>> clearing in the compiler, in the 'new' branch.
>
> Is there a chance for this feature to find its way into master before
> Clojur
I'm going to postpone the discussed above removing of "locking" - the write
bottleneck.
Because:
1. In-memory writes are very quick
2. there is no demand right now
3. it makes the backup workflow more complex
The next thing I'm going to add is snapshotting. However it is not a
priority for me ri
On 12 dec, 14:13, ajay gopalakrishnan wrote:
> Hi,
>
> I come from a OOPS (Java) world and I am used to Singletons, Inheritance,
> Statics, Interfaces etc.
> I am reading the Programming Clojure book and I understand multi-methods and
> when it is used.
> But I am still not able to see how to achi
I figured out the problem and thought I'd note it here.
When you "proxy" and object, the proxy code calls the constructor of
the object BEFORE it registers its own methods as overrides for the
object's methods. If the constructor calls methods, they'll be its
own implementations rather those of t
I'm guessing you're the author.
A very interesting critique. Well written, and you've got guts
posting it to this list.
There are a few very important factors you need to consider to have a
complete critique, though.
First, is the STM. This is THE killer feature of the language.
Ironically, it
On Sat, Dec 12, 2009 at 16:38, Sean Devlin wrote:
> Hmmm... this could be interesting. I"ll have to play with it.
>
> Do you have a CA on file with Rich? It'll be required to include the
> patch. You'll find information here.
>
> http://clojure.org/contributing
>
> Sean
Thanks for your intere
On Sat, Dec 12, 2009 at 11:03 AM, Sean Devlin wrote:
> Ummm some of these thing DON'T map to Clojure.
>
> I'd suggest you check out Rich's videos here:
>
> http://blip.tv/file/982823
>
> Anyway, as to how you would solve some of these problems in Clojure...
>
> Static methods you get for free,
Ummm some of these thing DON'T map to Clojure.
I'd suggest you check out Rich's videos here:
http://blip.tv/file/982823
Anyway, as to how you would solve some of these problems in Clojure...
Static methods you get for free, because everything is a function in
Clojure.
Singletons aren't rea
On Dec 10, 3:10 pm, Rich Hickey wrote:
> I'm happy to announce I have implemented this fine-grained locals
> clearing in the compiler, in the 'new' branch.
Is there a chance for this feature to find its way into master before
Clojure 1.1 is released?
--
You received this message because you are
Hmmm... this could be interesting. I"ll have to play with it.
Do you have a CA on file with Rich? It'll be required to include the
patch. You'll find information here.
http://clojure.org/contributing
Sean
On Dec 10, 4:44 pm, B Smith-Mannschott wrote:
> I've posted an attempt to teach duck-
Hi all,
I can't remember if I ever mentioned ClojureX (see signature for link)
on this list, but it's a sort of "installer" for Clojure (and
clojure-contrib, clojure-mode, swank-clojure, slime, jline and the
TextMate bundle). I originally created it to install everything on my
Mac (and on Linux),
Just a by-the-way:
I'm (now) aware of http://clojure.org/contributing and
http://clojure.org/patches . I'll put my CA in the mail on Monday and
pick this up again in the new year.
// Ben
On Wed, Dec 9, 2009 at 23:33, B Smith-Mannschott wrote:
> Duck-streams does good job supporting character ba
On Dec 11, 8:48 am, Chris Kent wrote:
> Rich Hickey gmail.com> writes:
>
>
>
> > An updated version of the code for datatypes[1] and protocols[2] is
> > now available in the 'new' branch[3].
>
> I've converted some code that used gen-class to use deftype and defprotocol
> and
> the results are
Hi,
I come from a OOPS (Java) world and I am used to Singletons, Inheritance,
Statics, Interfaces etc.
I am reading the Programming Clojure book and I understand multi-methods and
when it is used.
But I am still not able to see how to achieve the effects of Singletons,
Inheritance, Statics, Interf
This shaves 7 characters off Sean's solution and short circuits just
as fast:
(some #(and (some #{"rabble"} (val %)) (key %)) players)
Happy hacking!
On Dec 10, 3:29 pm, Sean Devlin wrote:
> Oops! Slight mistake
>
> (ffirst (filter (comp (partial some #{"rabble"}) val) players))
>
> On Dec 10,
Well, the 3d test applications from https://j3d-webstart.dev.java.net/test/
work correctly and every other Java test I've tried works, but I am
not sure how to find out what's on the CLASSPATH. Is CLASSPATH an
environment variable? If so, I don't have any binding for it, but then
the immediate ques
You need this jar file j3d-core-1.3.1.jar in your classpath
If you are using leiningen then add this to your project.clj [java3d/
j3d-core "1.3.1"]
if not then you can download that jar from here
http://repo2.maven.org/maven2/java3d/j3d-core/1.3.1/
-Devender
On Dec 11, 9:15 am, rebcabin wrote:
Hi All,
Apologies for a newbie question:
I am trying to invoke some java libraries from clojure and some of the
methods take boolean arrays as their parameters.
The documentation (
http://richhickey.github.com/clojure/clojure.core-api.html#clojure.core/boolean-array)
does say that there is a boo
Hi fellow Clojurians -
I am stumped with coming up with a definition of a clojure zipper for
json data. Not only would this be useful for json data, but for any
generic hash-map/vector data structure. I don't have a lot of
experience with zippers, but it would be fantastic to provide this
type o
http://kusimari.blogspot.com/2009/12/analysing-clojure-programming-language.html
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On Thu, Dec 10, 2009 at 7:20 AM, Timothy Pratley
wrote:
> Hi,
>
> update-in is an especially useful function but I find the update
> function inevitably requires a check for nil. If I could supply a not-
> found value then my code would get better golf scores.
>
> When I reach for update-in, I usu
On 12 Dec 2009, at 01:14, Jason Wolfe wrote:
> A very simple example is: I have a protocol "A", and sub-protocols
> "A1" and "A2". Every A is either an A1 or A2, but not both (and this
> split is closed, as far as I'm concerned). Sometimes I want to deal
> with instances of A1 and A2 together, a
On 11 Dec 2009, at 23:26, Dan Larkin wrote:
> On Dec 11, 2009, at 3:04 PM, Sean Devlin wrote:
>
>> Wouldn't ::quit do the same thing?
>
> It wouldn't, because the repl is evaluating in the context of
> wherever you put the (debug-repl) call, so its namespace won't be
> "dr".
>
> What about ins
On Dec 11, 11:56 pm, ataggart wrote:
> On Dec 11, 11:44 pm, ataggart wrote:
>
>
>
>
>
> > On Dec 11, 4:14 pm, Jason Wolfe wrote:
>
> > > I've been trying out the new branch, and on the whole I like it a lot.
> > > I know it'll take some time to learn how do things properly the "new"
> > > way
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