> I guess I'm still stuck on how to expand the vector of arguments in place...
One way is (apply function vector) -> (function v1 v2 v3)
> and I'm really not very sure what you're doing with the '&' in the
> parameters for the str-invoke. Is that a way of slurping all the remaining
> parameters
+1 on that!
Graphs are common and many people are going to write similar
algorithms to yours. Also, as a library, it is going to have nice
interface (than if put together with Datalog) and will be much easier
to reuse.
Frantisek
PS: Graphs are my favorite data structure, so I am lobbying for
th
+1 :)
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Following up on my own post:
Jan Rychter writes:
> Rich Hickey writes:
>> On Jan 26, 11:15 am, Cosmin Stejerean wrote:
>>> On Mon, Jan 26, 2009 at 6:34 AM, Rich Hickey wrote:
>>>
>>> > On Jan 25, 4:10 pm, Laurent PETIT wrote:
>>> > > #- makes sense (CL didn't always make things the wrong way
Hello! Just a quick note:
Issue 52: Make set/union accept any number of arguments
http://code.google.com/p/clojure/issues/detail?id=52
seems to be solved already by:
SVN 1276
http://code.google.com/p/clojure/source/detail?r=1276
added multi-arg clojure.set/union/difference/intersection, patch fr
I have a problem that I am unable to solve by myself. I've been trying
to use parts of the weld framework by Mark McGranaghan. However, clojure
fails to compile it with an error I don't understand:
java.lang.IllegalArgumentException: Don't know how to create ISeq from: Symbol
[Thrown class
Hi Tim, thanks for the feedback!
On Feb 21, 11:16 am, Timothy Pratley wrote:
> (1) auto-agents by SS in contrib has a more convenient syntax [maybe
> you can mimic it]
Agreed, it is nicer. At the moment 'def-cell' is already a stretch for
me, but maybe someday I'll get there. :)
> (2) I can a
Thanks Chouser!!
I needed it just to test the 'nth'. I had to ask, just couldn't figure
it out :-)
Yes, I prefer re-seq - especially with such nice tools like
http://cljre.com/
from Mark McGranaghan
http://groups.google.com/group/clojure/browse_frm/thread/bbc9fd453667d953/a79a738cbe7f41e9
Franti
+1! That'd be really useful.
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Thanks guys!
It will take some time for me to wrap my head around this but it is
more than I hoped for.
Max
On Feb 21, 9:22 pm, Jeffrey Straszheim
wrote:
> I have a "toy" version of Datalog working now here:
>
> http://code.google.com/p/clojure-datalog/
>
> By "toy" I mean it works but is i
+1
Francesco
On Feb 22, 2:59 am, Jeffrey Straszheim
wrote:
> As part of my Datalog work I'm putting together some directed graph
> algorithms, mostly things like finding strongly connected components, and
> building dependency stratifications (think topological sort but with the
> results group
Thanks for the details Anand, I understand better now.
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Konrad Hinsen writes:
> On Feb 18, 2009, at 9:39, Jan Rychter wrote:
>
>> Is anyone working on a Parenscript
>> (http://common-lisp.net/project/parenscript/) for Clojure?
>
> There's Chouser's ClojureScript in clojure.contrib. I don't know if
> it is similar to Parenscript, but it has similar
2009/2/22 Chouser
>
> On Sat, Feb 21, 2009 at 5:36 PM, David Nolen
> wrote:
> > My point is simply that whether something is immutable or not has nothing
> to
> > do with how that data structure is being used in the program.
> > Naming conventions signify usage. You could write a pure Java
> >
On Sun, Feb 22, 2009 at 7:49 AM, Jan Rychter wrote:
>
> Konrad Hinsen writes:
>
>> On Feb 18, 2009, at 9:39, Jan Rychter wrote:
>>
>>> Is anyone working on a Parenscript
>>> (http://common-lisp.net/project/parenscript/) for Clojure?
>>
>> There's Chouser's ClojureScript in clojure.contrib. I don
Does zero arguments return #{} ?
Has intersection changed?
On Sun, Feb 22, 2009 at 5:16 AM, Frantisek Sodomka wrote:
>
> Hello! Just a quick note:
> Issue 52: Make set/union accept any number of arguments
> http://code.google.com/p/clojure/issues/detail?id=52
>
> seems to be solved already by:
>
Just as a point of fact, I don't plan to make a complete *every algorithm
you can think of* package, just the ones I need. However, it would be easy
to add others submitted by the community. I could be a gathering place of
graph algorithms.
On Sun, Feb 22, 2009 at 7:31 AM, Francesco Bellomi <
fr
On Feb 22, 2009, at 4:41 AM, Jan Rychter wrote:
>
> Following up on my own post:
>
> Jan Rychter writes:
>> Rich Hickey writes:
>>> On Jan 26, 11:15 am, Cosmin Stejerean wrote:
On Mon, Jan 26, 2009 at 6:34 AM, Rich Hickey
wrote:
> On Jan 25, 4:10 pm, Laurent PETIT wrote:
On Feb 22, 2009, at 10:11 AM, Jeffrey Straszheim wrote:
> Just as a point of fact, I don't plan to make a complete *every
> algorithm you can think of* package, just the ones I need. However,
> it would be easy to add others submitted by the community. I could
> be a gathering place of g
user=> (union)
#{}
user=> (union #{1 2})
#{1 2}
user=> (intersection #{1 2})
#{1 2}
user=> (intersection #{1 2} #{2 3})
#{2}
user=> (intersection #{1 2} #{2 3} #{2 4})
#{2}
Don't take me too seriously when I post my messages :-)
Anyway, Rich Hickey closed the issue, so please post anything that
This is _so_ awesome!!
Thanks a ton for your patient help Tim, and others.
In the end I also had to switch the use of into-array to to-array, since
into-array expects all the elements to be the same type, and my args were of
varying types. Using to-array worked since it cast each element to the
O
Any thoughts on this one?
Impatient Frantisek :-)
On 21 Ún, 22:28, Frantisek Sodomka wrote:
> Hello!
> Currently, 'pop' throws an exception if the collection is empty:
>
> clojure.core/pop
> ([coll])
> For a list or queue, returns a new list/queue without the first
> item, for a vector, ret
I've added a section on the Wiki under the examples:
http://en.wikibooks.org/wiki/Clojure_Programming/Examples#Invoking_Java_method_through_method_name_as_a_String
Again, thanks!
-Rich
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Perhaps some context help. Why would you want to continue popping an
empty collection? If you are in a loop, when will you stop popping it?
Perhaps there is a more logical idiom to use for the case you run into
pop nil exceptions (doseq?)
On Feb 22, 5:18 pm, Frantisek Sodomka wrote:
> Any though
Hi Jan,
I'm not familiar with Weld, but based on the error message shown the
cause might be the recent changes in making sequences fully lazy.
Which version of clojure.contrib are you using? If it works for Mark,
you might want to make sure that you're running the same version of
Clojure and clo
>
> I'm curious about what you need that's different from what
> ClojureScript provides: a mechanism for compiling a subset of Clojure
> to JavaScript code that behaves like you'd expect the Clojure code to
> behave.
>
ParenScript is a subset of common lisp and a javascript generator that is
meant
Graphs has always inspired me and seeing implementation in Clojure
will be no less inspiring.
http://www.visualcomplexity.com/vc/
http://planarity.net/
Frantisek
On 22 Ún, 16:11, Jeffrey Straszheim
wrote:
> Just as a point of fact, I don't plan to make a complete *every algorithm
> you can thi
On Sat, Feb 21, 2009 at 10:23 PM, Mibu wrote:
>
> comp.lang.lisp had a great Road to Clojure Survey thread which was
> actually an x-is-better-than-y thread that turned into a full blown
> flamewar.
>
>
> http://groups.google.com/group/comp.lang.lisp/browse_thread/thread/0d05837df1efe075
>
> Thes
You would not be able to distinguish between an empty collection and
pop returning a nil value.
On Feb 21, 4:28 pm, Frantisek Sodomka wrote:
> Hello!
> Currently, 'pop' throws an exception if the collection is empty:
>
> clojure.core/pop
> ([coll])
> For a list or queue, returns a new list/que
I've set up two Clojure builds on the Tapestry360 Continuous Integration Site:
http://tapestry.formos.com/bamboo
A trunk build runs after any changes to clojure.
The nightly build runs every morning.
Clojure now produces Maven artifacts in the
http://tapestry.formos.com/maven-snapshot-reposito
Hi,
It looks like it's because the period `.' comes after the quote `"' in
`cookies map".'; this seems to make the meta :arglists (.) - this may
be a clojure bug.
You may want to put the period before the double quotes.
In the mean time, a check for this was added in the latest swank-
clojure (
Rich Hickey writes:
[...]
How about #_ ?
>>>
>>> I would prefer #-, but if you think you might want to have a reader
>>> conditional system similar to CL in the future, #_ is fine as well.
>>>
>>> Actually, any character is better than plucking out multi-line
>>> forms and
>>> commenting t
>> I'm curious about what you need that's different from what
>> ClojureScript provides: a mechanism for compiling a subset of Clojure
>> to JavaScript code that behaves like you'd expect the Clojure code to
>> behave.
Dan writes:
> ParenScript is a subset of common lisp and a javascript generato
All the documentation I've seen on validators for reference types says
they should throw an exception if the value is invalid. I've never
seen it explained that they should return true if the value is valid.
That's seems to be the case though. Can someone confirm that?
--
R. Mark Volkmann
Object
On Sun, Feb 22, 2009 at 1:58 PM, Jan Rychter wrote:
>
> Exactly. I need it to be small, lightweight and produce small readable
> Javascript. I don't want Javascript code to behave like Clojure, on the
> contrary -- I want it to behave like Javascript. I just want lispy
> syntax for it and, most i
In general, I find that multiple arguments types for a function confusing.
If dotimes is going to take multiple types it should be a multifn. That
seems to imply a performance hit.
I think Clojure wisely does not (or rarely does not?) allow for multiple
types to be passed into a function.
On top o
I changed clojure.contrib.test-clojure so that it can be loaded
without running tests. Now to run the tests from the repl, please use
code like this:
Clojure
user=> (require 'clojure.contrib.test-clojure)
nil
user=> (clojure.contrib.test-clojure/run)
Lo
On Sun, Feb 22, 2009 at 2:10 PM, Mark Volkmann
wrote:
>
> All the documentation I've seen on validators for reference types says
> they should throw an exception if the value is invalid. I've never
> seen it explained that they should return true if the value is valid.
> That's seems to be the ca
>
>
> Ah, ok. That is indeed quite different from ClojureScript, primaryly
> because it has immutable collections. And nearly unreadable output.
> :-)
>
> So now my question is -- in what way is ParenScript insufficient?
It depends on common lisp instead of clojure? :)
How does ClojureScript i
On Sun, Feb 22, 2009 at 1:34 PM, David Nolen wrote:
> In general, I find that multiple arguments types for a function confusing.
> If dotimes is going to take multiple types it should be a multifn. That
> seems to imply a performance hit.
> I think Clojure wisely does not (or rarely does not?) al
I agree that this is initially confusion, but I think that if you spend more
than a couple of days with Clojure you will understand the ubiquitous and
liberal use of binding forms.
On Sun, Feb 22, 2009 at 2:42 PM, Mark Volkmann wrote:
>
> On Sun, Feb 22, 2009 at 1:34 PM, David Nolen
> wrote:
> >
On Sun, Feb 22, 2009 at 1:40 PM, Chouser wrote:
>
> On Sun, Feb 22, 2009 at 2:10 PM, Mark Volkmann
> wrote:
>>
>> All the documentation I've seen on validators for reference types says
>> they should throw an exception if the value is invalid. I've never
>> seen it explained that they should ret
On Feb 21, 9:53 pm, André Thieme wrote:
> On 21 Feb., 18:24, Mark Volkmann wrote:
>
> > Currently the dotimes macro requires its first argument to be a vector
> > for binding a variable to the number of times the body should be
> > executed. Inside the body, that variable is bound to the value
Seeing your comments, I've decided to try to get my Javascript
generator suitable for public use. It'll take a day or two, I
think. Have you got a catchy name for it?
Jim
Dan wrote:
>
> It depends on common lisp instead of clojure? :)
>
> How does ClojureScript integrates with Javascript libr
On Sun, Feb 22, 2009 at 1:46 PM, David Nolen wrote:
> I agree that this is initially confusion, but I think that if you spend more
> than a couple of days with Clojure you will understand the ubiquitous and
> liberal use of binding forms.
I know I'm beating this to death and need to let this dro
On Sun, Feb 22, 2009 at 1:54 PM, Mirko wrote:
> In my practice, almost every project (no matter how short it is)
> starts by writing raw code, and then, when I see what is being done
> often, replacing parts with macros that simplify the code and make it
> easier to read.
But wouldn't it be nic
Here is an interesting read, for those of you that (also) occasionally
daydream about having a hardware jvm to play with ;).
>From Cliff Click Jr.’s Blog's Blog
"I had an email conversation between myself, David Moon & Daniel
Weinreb. For the younger readers: David Moon is one of the original
ar
As for names, all I can think of is:
(js)
It's like javascript but shorter and lisper.
On the other hand it's not obvious how you should pronounce it.
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On Sun, Feb 22, 2009 at 3:12 PM, jim wrote:
>
> Seeing your comments, I've decided to try to get my Javascript
> generator suitable for public use. It'll take a day or two, I
> think. Have you got a catchy name for it?
>
> Jim
>
That would be great! My main reason to want this is for this li
Looking at qooxdoo was down a little further on my list, since Kenny
Tilton mentioned it. I'd like to do some web app type stuff, which
why I took a crack at the parenscript thing in the first place.
On Feb 22, 2:18 pm, Dan wrote:
> That would be great! My main reason to want this is for this
Is there a summary of the changes to Clojure that the lazy sequences
required. For instance fnseq doesn't exist any more, that I see.
Also, lazy-cons went away.
Jim
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"C
The reason I picked Clojure is because in order to distribute software
you need people to download and install the CL you pick. That's like
asking a doorknob to turn for you without touching it.
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I'm not sure, but I may have found a bug in Atom.java. The swap method
calls compareAndSet. After that, if the new value differs from the
current value, it calls notifyWatches. However, at that point
compareAndSet would have already called notifyWatches. Is there are
reason to do it again?
--
R.
On Sun, Feb 22, 2009 at 2:40 PM, Dan wrote:
>
> It depends on common lisp instead of clojure? :)
Oh, it requires Common Lisp to do the translation? Bleh.
> How does ClojureScript integrates with Javascript libraries? It's almost
> unthinkable now to do a site that is not based on some of the f
On Feb 22, 2009, at 2:48 PM, Mark Volkmann wrote:
>
> On Sun, Feb 22, 2009 at 1:40 PM, Chouser wrote:
>>
>> On Sun, Feb 22, 2009 at 2:10 PM, Mark Volkmann
>> wrote:
>>>
>>> All the documentation I've seen on validators for reference types
>>> says
>>> they should throw an exception if the va
In some old code, I did something like:
(with-meta (concat [1 3] [8 4])
{:tail true}))
which now fails. I believe it's because the result of concat is now
some kind of reference.
Does anyone have any advice on a workaround?
Jim
--~--~-~--~~~---
On Feb 22, 2009, at 3:48 PM, Mark Volkmann wrote:
>
> I'm not sure, but I may have found a bug in Atom.java. The swap method
> calls compareAndSet. After that, if the new value differs from the
> current value, it calls notifyWatches. However, at that point
> compareAndSet would have already cal
Jim,
> As long as your breaking things in monads, what would you think of
> changing m-seq to this.
...
> so that it doesn't accept a list of monadic values but instead lets
> you call it with any number of mv's.
>
> Instead of:
>
> (m-seq [mv1 mv2 mv3])
>
> you would write
>
> (m-seq mv1 mv2 mv3
A good summary is here: http://clojure.org/lazier
Note that all this has indeed been committed to the latest SVN of
Clojure. I think that most of clojure.contrib has been updated too.
On Feb 22, 1:32 pm, jim wrote:
> Is there a summary of the changes to Clojure that the lazy sequences
> require
I converted the code in the paper "Monadic Parsing in Haskell" to
Clojure. Both m-plus and m-seq are used to combine lists of parsers.
m-plus is used to build a parser that executes each parser in the list
until one succeeds. m-seq is used to build a parser that executes all
the parsers in the l
On Feb 22, 2009, at 4:13 PM, samppi wrote:
A good summary is here: http://clojure.org/lazier
Over time there were at least two pages at clojure.org describing work
on the lazy branch. "lazier" is an older one.
The one that describes what is now checked into the main branch is:
ht
Thanks,
I had skimmed that link and then forgot about it.
Jim
On Feb 22, 3:13 pm, samppi wrote:
> A good summary is here:http://clojure.org/lazier
>
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On Sun, Feb 22, 2009 at 4:07 PM, jim wrote:
>
> In some old code, I did something like:
>
> (with-meta (concat [1 3] [8 4])
>{:tail true}))
>
> which now fails. I believe it's because the result of concat is now
> some kind of reference.
>
> Does anyone have any advice on a w
Thanks! That was exactly what I needed to get my old code to pass my
unit tests. Now it's on to making changes to bring it up to date with
the new lazy stuff.
Jim
On Feb 22, 3:32 pm, Chouser wrote:
>
> LazySeq extends AFn, so you can't change the metadata once the object
> exists. However, S
Jeffrey Chu writes:
> It looks like it's because the period `.' comes after the quote `"' in
> `cookies map".'; this seems to make the meta :arglists (.) - this may
> be a clojure bug.
>
> You may want to put the period before the double quotes.
Hah! Thanks! I didn't spot that!
That indeed seem
On Feb 22, 3:14 pm, Mark Volkmann wrote:
> On Sun, Feb 22, 2009 at 1:54 PM, Mirko wrote:
> > In my practice, almost every project (no matter how short it is)
> > starts by writing raw code, and then, when I see what is being done
> > often, replacing parts with macros that simplify the code an
There was a functionality in build.xml to run tests from the command
line. When you correctly set clojure.jar path, you could just do:
ant test_clojure
to run test-clojure tests. There is also:
ant test_contrib
which still works. "ant test_clojure" is broken by this change. (bad?
ok? don't kno
"if the new value differs from the current value, it calls
notifyWatches."
I noticed that the 'changed' bool has been removed in favor of only
notifying when different. Should this logic also be applied to reset()
which currently does not check for delta?
Regards,
Tim.
--~--~-~--~
I am also interested in the reasoning behind this. See my related
question here:
http://groups.google.com/group/clojure/browse_thread/thread/b04d49784c895030
--Kevin Albrecht
On Feb 21, 5:47 am, Mark Volkmann wrote:
> If I understand correctly, ending a function name with an exclamation
> poi
On Feb 22, 2009, at 5:41 PM, Frantisek Sodomka wrote:
There was a functionality in build.xml to run tests from the command
line. When you correctly set clojure.jar path, you could just do:
ant test_clojure
Fixed. Thanks for the report.
Regarding test_contrib, I would like to update it along
On Feb 22, 2:54 pm, Mirko wrote:
>
> In lisp you would define it as (untested):
>
> (defmacro print-times (reps text)
> `(do-times (i ,reps)
> (print ,text))
>
> (Not trying to force-feed lisp, just that I do not know the closure
> syntax).
user=> (defmacro repeat-times [n & body]
The code below registers a watcher with a Var, a Ref and an Atom.
The watch Agent has a map value that is used to count the number of
times each thing it is watching changes.
The keys are reference objects and the values are change counts.
The code correctly reports two changes to the Ref, three c
> (defn my-watcher-action [current-value reference]
> (let [change-count-map current-value
> old-count (change-count-map reference)
> new-count (if old-count (inc old-count) 1)]
> (assoc change-count-map reference new-count)))
It seems to me that your problem is that you are n
Hi,
How about having this function call .getColumnLabel instead
of .getColumnName. That way, you can do a join with duplicate column
names and rename them in the SQL query...
select name name1, name name2, ... from ...
and resultset-seq won't throw an exception. ?
Rob
--~--~-~--~
On Feb 23, 1:55 am, pmf wrote:
> > (defn my-watcher-action [current-value reference]
> > (let [change-count-map current-value
> > old-count (change-count-map reference)
> > new-count (if old-count (inc old-count) 1)]
> > (assoc change-count-map reference new-count)))
>
> It se
On Feb 22, 6:19 pm, Raffael Cavallaro
wrote:
> On Feb 22, 2:54 pm, Mirko wrote:
>
>
>
> > In lisp you would define it as (untested):
>
> > (defmacro print-times (reps text)
> > `(do-times (i ,reps)
> > (print ,text))
>
> > (Not trying to force-feed lisp, just that I do not know the closure
> >
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