On Fri, Jan 13, 2012 at 6:47 PM, Anthony Grimes wrote:
> Clojail errs on the side of safety and not on the side of "Oh, well maybe he
> wasn't trying to break the sandbox. Let's allow it anyway.". Treating macros
> as opaque is just another hole in what is already difficult sandboxing.
> Macros ar
On Thu, Jan 12, 2012 at 3:31 AM, markus wrote:
> Computers don't accuse, they process data. And they are not (yet?)
> capable of reading a user's intentions.
Technically no, but it's doubtful that a user using a macro like "for"
intends to "cheat", so from the *programmer's* standpoint it's not
c
You'll need to be a bit more specific.
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It seems dubious to me that it accuses users of cheating when they
clearly had no intent to cheat. Is this intended behavior of 4Clojure
or a bug?
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On Mon, Jan 9, 2012 at 12:53 PM, Tom Chappell wrote:
> Ok, I've got a couple thousand lines of Clojure under my belt, but
> this has me stumped, unless it's a compiler etc. issue. If I'm
> missing something dumb, what is it, please?
>
> I have a function that is failing a not-nil precondition. H
On Mon, Jan 9, 2012 at 3:43 PM, Jay Fields wrote:
> On Mon, Jan 9, 2012 at 3:20 PM, Cedric Greevey wrote:
>
>> Talk about completely missing the point.
>
> I had no idea what core.unify would be used for either. However, the
> email included a link to the github page,
On Mon, Jan 9, 2012 at 2:20 PM, Shantanu Kumar wrote:
>> #3 seems unlikely to be implemented. ClojureScript doesn't have Vars, and
>> it doesn't have threads, so there's not much for `binding` to do. I could
>> see `with-redefs` being supported, however.
>
> Hi Stuart,
>
> Thanks for the pointers.
On Mon, Jan 9, 2012 at 2:16 PM, Michael Fogus wrote:
>> Not really, not with a single fairly generic word like "unification".
>
> In the amount of time that you spent lecturing me on good library
> release note practices you could have learned what unification was,
> read the code, and decided if
On Mon, Jan 9, 2012 at 2:08 PM, Sean Corfield wrote:
> On Mon, Jan 9, 2012 at 11:00 AM, Cedric Greevey wrote:
>> On Mon, Jan 9, 2012 at 1:45 PM, Michael Fogus wrote:
>>> Google also helps too. :-)
>> Not really, not with a single fairly generic word like "unificati
On Mon, Jan 9, 2012 at 1:45 PM, Michael Fogus wrote:
>> Yes, but what exactly are these "unification binding, subst, and
>> unification functions"?
>
> This is information that seems a bit odd to include in a set of
> release notes, but I suppose a link to where such information could be
> found i
On Mon, Jan 9, 2012 at 1:18 PM, Stuart Sierra
wrote:
> #3 seems unlikely to be implemented. ClojureScript doesn't have Vars, and it
> doesn't have threads, so there's not much for `binding` to do. I could see
> `with-redefs` being supported, however.
Actually, the lack of threads just simplifies
On Mon, Jan 9, 2012 at 10:36 AM, Linus Ericsson
wrote:
> I want to generate rules with constant and/or functions producing parts of
> the rules:
>
> (defn rulemaker []
> (str "SCOPE " global-constant ";" (some-global-function) ";"))
>
> which could be called with
>
> (with-super-closure model-i
On Mon, Jan 9, 2012 at 7:48 AM, Matthew Giannini
wrote:
> Cedric - thanks. I'm new to Clojure and after posting this realized that I
> could/should use one of the do* approaches. I ended up using doseq and it
> worked great.
>
> Thanks.
You're welcome.
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On Sun, Jan 8, 2012 at 4:11 PM, Samuel Lê wrote:
> Yes, seq? works. Thanks for the help!
You're welcome.
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On Mon, Jan 9, 2012 at 8:00 AM, Fogus wrote:
> core.unify v0.5.2 Release Notes
> ===
>
> core.unify is a Clojure contrib library providing the following
> features:
>
> * Factory functions for constructing unification binding, subst, and
> unification functions, with or
On Sun, Jan 8, 2012 at 10:30 AM, Samuel Lê wrote:
> Hi and Happy New Year to all the Clojure mailing list,
>
> I am am having some trouble with the two classes Cons and PersistentList:
>
> user> (class (conj (map #(+ % 1) '(1 2 3)) 4))
> clojure.lang.Cons
> user> (class '(1 2 3 4))
> clojure.lang
On Fri, Jan 6, 2012 at 9:25 AM, Matthew wrote:
> (defn id3-encode
> ([] (id3-encode test-out))
> ([file]
> (with-open [out (-> (File. file) (FileOutputStream.)
> (BufferedOutputStream.) (DataOutputStream.))]
> (binding [*out* out]
> (map #(write-a :byte %) [\I \D \3])
>
> When
On Sat, Jan 7, 2012 at 8:01 AM, wrote:
> Sent using BlackBerry® from Orange
>
> From: clojure@googlegroups.com
> Sender: clojure@googlegroups.com
> Date: Sat, 07 Jan 2012 00:21:58 +
> To: Digest Recipients
> ReplyTo: clojure@googlegroups.com
> Subject: Digest
On Fri, Jan 6, 2012 at 11:28 PM, Alan Malloy wrote:
> but if you look at the post
There is no call for taking a rude tone. I correctly answered the
question as originally posed.
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On Fri, Jan 6, 2012 at 10:22 PM, Alan Malloy wrote:
> On Jan 6, 6:16 pm, Cedric Greevey wrote:
>> On Fri, Jan 6, 2012 at 4:34 PM, Alan Malloy wrote:
>> > On Jan 6, 12:56 pm, Jozef Wagner wrote:
>> >> Thank you,
>>
>> >> But the things are more co
On Fri, Jan 6, 2012 at 4:34 PM, Alan Malloy wrote:
> On Jan 6, 12:56 pm, Jozef Wagner wrote:
>> Thank you,
>>
>> But the things are more complicated. In my case, I need to update the atom
>> with the result of a (native) function which unfortunately also performs
>> some side effects and cannot b
On Fri, Jan 6, 2012 at 11:12 AM, Andrew wrote:
> http://en.wikibooks.org/wiki/Learning_Clojure/Macros
>
> The page says the following:
>
> (def pointless (fn [n] n))
>
> "Whatever is passed to this macro---a list, a symbol, whatever---will be
> returned unmolested and then evaluated after the call
On Fri, Jan 6, 2012 at 10:29 AM, Jonathan Cardoso
wrote:
> Hi! I have a small stupid question and I hope you guys can help me...
>
> I wanted to sort a vetor, say [25 5 70] but I can't just use any sort
> algorithm because later I will need to get the index of the element in the
> original vector.
On Tue, Jan 3, 2012 at 6:05 PM, meb wrote:
> I see two fairly straightforward paths to simulating multiple returns
> without breaking existing callers. Both take advantage of thread-local
> state and establish one convention for the caller ...
Both of them have reentrancy problems -- in the push-
On Tue, Jan 3, 2012 at 12:32 PM, Phil Hagelberg wrote:
> Cedric Greevey writes:
>
>> Seriously, though. Terminals? Escape codes? Impedance mismatches
>> involving term types and escape codes? What is this, the Dark Ages?
>> Those kinds of problems simply should no
On Tue, Jan 3, 2012 at 6:11 AM, James Reeves wrote:
> On 3 January 2012 11:06, Cedric Greevey wrote:
>> There's a problem, though: the str-utils2/ltrim function seems to be
>> missing. This is a breaking change for some code I'm porting from 1.2
>> to
The clojure.string namespace has replaced clojure.contrib.str-utils
and clojure.contrib.str-utils2.
There's a problem, though: the str-utils2/ltrim function seems to be
missing. This is a breaking change for some code I'm porting from 1.2
to 1.3. Where is that function now?
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On Tue, Jan 3, 2012 at 12:28 AM, Baishampayan Ghose wrote:
>> Getting colors outside M-x clojure-jack-in requires a couple extra steps
>> I forgot to document, I just added it here:
>>
>> https://github.com/technomancy/swank-clojure/commit/94fa71f90e52c55d74
>
> Thanks, the above steps worked--alm
On Mon, Jan 2, 2012 at 2:16 PM, Tassilo Horn wrote:
> nchurch writes:
>
> Hi,
>
>> Someone was asking on the list here about multiple return values,
>> which Clojure does not have.
>>
>> If the facility were ever added, perhaps multiple values could be
>> accessed via namespaces. Functions would
On Mon, Jan 2, 2012 at 5:28 PM, Stephen Compall
wrote:
> On Sun, 2012-01-01 at 23:16 -0500, Cedric Greevey wrote:
>> And that will obviously be chock-full of internals changes and
>> miscellaneous tweaks and not just the user-visible feature
>> changes/additions, aimed
On Sun, Jan 1, 2012 at 11:09 PM, Cedric Greevey wrote:
> On Sun, Jan 1, 2012 at 10:31 PM, Stephen Compall
> wrote:
>> On Sun, 2012-01-01 at 22:10 -0500, Cedric Greevey wrote:
>>> Odd that this isn't named not-empty? with a ? character.
>>
>> Not at all;
On Sun, Jan 1, 2012 at 10:31 PM, Stephen Compall
wrote:
> On Sun, 2012-01-01 at 22:10 -0500, Cedric Greevey wrote:
>> Odd that this isn't named not-empty? with a ? character.
>
> Not at all; it's not a predicate. See also `every?' versus `some'.
It's us
On Sun, Jan 1, 2012 at 5:55 PM, Stephen Compall
wrote:
> On Fri, 2011-12-30 at 15:21 -0800, rahulpilani wrote:
>> 1: (ns prefix-tree)
>
> While this is just a sample, namespaces without at least one `.' are
> discouraged. I favor the Java convention (prefix with backwards
> Internet domain that
On Fri, Dec 30, 2011 at 9:19 AM, PC wrote:
> There's a very nice summary of previous attempts at this on David Wheeler's
> web page: http://www.dwheeler.com/readable/index.html
> I think these ideas have some merit. I would like to have the readability
> and conciseness of Python with the feature
On Thu, Dec 29, 2011 at 10:50 PM, Erlis Vidal wrote:
> Cedric, you have a really good point, I just realized it after reading your
> email. After sending the original email I saw what the error was, but what I
> still unable to know is how could I debug from Clooj, other than using
> println, any
On Thu, Dec 29, 2011 at 6:23 PM, Mark Engelberg
wrote:
> I'd also like to know whether Clooj has any debug or stacktracing
> capabilities. Also, can the Clooj repl control the print level of
> infinite lazy structures?
(set! *print-length* 20)
(set! *print-level* 20)
(.printStackTrace *e)
Hav
On Tue, Dec 27, 2011 at 2:03 PM, endbegin wrote:
> Hi,
>
> I am new to learning clojure, and I am hoping there is a solution to
> something that is not obvious to me ... I have a function that I want
> to run multiple times, measure the time it takes to execute each
> function, and put those numbe
On Thu, Dec 22, 2011 at 11:59 PM, nchurch wrote:
> What I really want you to notice is how we are faced with a choice:
> either we improve the library code (presumably by making split
> optionally return an array of separators matched by the regex for
> later reassembly by join, perhaps in metadat
On Thu, Dec 22, 2011 at 4:54 PM, Peter Danenberg wrote:
> Scheme, for instance, obeys the Law of Macro-Parsimony: "don't use
> defmacro," namely, "where defn will suffice;" Clojure, on the other
> hand, is macro-liberal.
>
> In other words, everyone seems to prefer e.g. `(defmacro foo [vars &
> bo
On Wed, Dec 21, 2011 at 1:42 AM, Antonio Recio wrote:
> I would like to convert a java code to clojure that contains the word
> "this", but I don't know how to.
>
> Java:
> boxWidget.AddObserver("InteractionEvent", this, "myCallback");
>
> Clojure:
> (doto boxWidget (.AddObserver "InteractionEvent
On Wed, Dec 21, 2011 at 12:16 AM, Antonio Recio wrote:
> Whith this code:
> (defn myCallback
> (def t (vtk.vtkTransform.))
> (doto boxWidget
> (.GetTransform t)
> (-> (.GetProp3D) (.SetUserTransform t))
> ))
>
> I get this error. Why?
> IllegalArgumentExceptio
On Tue, Dec 20, 2011 at 6:35 PM, Sean Corfield wrote:
> On Tue, Dec 20, 2011 at 1:04 PM, Aaron Cohen wrote:
>> The classloader that loaded RT is the one that is used by the loadLibrary
>> call in RT.loadLibrary.
>>
>> If you call System/loadLibrary from a clojure form, it will be an instance
>> o
On Tue, Dec 20, 2011 at 2:05 AM, Alan Malloy wrote:
> On Dec 19, 9:25 pm, Phil Hagelberg wrote:
>> JSON as readable Clojure was discussed and shot down a while back, albeit
>> with a weirder
>> implementation:http://groups.google.com/group/clojure-dev/browse_thread/thread/5b066...
>> idea of col
On Sun, Dec 18, 2011 at 2:56 PM, Bill Robertson
wrote:
> I'm trying to define records based on meta data read in at runtime,
> and I'm attempting to write a function that extracts name and attrs
> and passes them to defrecord, but I don't understand how to
> dynamically create the symbol for the r
On Sat, Dec 17, 2011 at 11:08 AM, Baishampayan Ghose wrote:
>> This may sound a bit weird, but can I "unquote-splice" something when
>> calling a macro. Here's an attempt to do this with hiccup:
>>
>> (defn get-header
>> [[:link {:type "text/css" ...}]
>> [:script {:type "text/javascript" ...
On Sat, Dec 17, 2011 at 11:55 AM, Ben Evans
wrote:
> Hi,
>
> There would normally be an Incanter Hack Day taking place tomorrow.
>
> However, our usual venue (the Royal Festival Hall) has had bad wifi
> the last couple of times, and we don't feel that it's fair to try to
> run a Hack Day under tho
On Fri, Dec 16, 2011 at 8:20 AM, Meikel Brandmeyer wrote:
> Hi,
>
> Am 16.12.2011 um 12:17 schrieb Cedric Greevey:
>
>> You *already* can't change the type signature of an optimized function
>> without needing to recompile its callers.
>
> But once you settle
2011/12/16 jaime :
> Yes this is a good point, but how can I avoid this blowing up problem
> if I'm not handling a single variable (just as the code in my last
> post)?
Someone else indicated that just using pr-str and using the
*print-length* and *print-level* vars can avoid the problem.
Or, you
On Fri, Dec 16, 2011 at 4:51 AM, Meikel Brandmeyer wrote:
> Hi,
>
> Am 16.12.2011 um 01:58 schrieb Cedric Greevey:
>
>> I know that every fn is a class; I am questioning the very need for
>> "prim interfaces".
>
> If you don't have an interface,
On Thu, Dec 15, 2011 at 10:13 PM, David Nolen wrote:
> Nobody wants map-longs. We have lovely abstractions like map / filter /
> reduce, we have primitive fns, we have collections which can hold
> primitives, we have type hints.
>
> What I'd like to see is that by adding one single annotation to t
On Thu, Dec 15, 2011 at 9:31 PM, David Nolen wrote:
> On Thu, Dec 15, 2011 at 9:23 PM, Cedric Greevey wrote:
>> There is no possibility of "high performance higher order usage",
>> because primitives are boxed inside of collections. Unless you
>> proliferate in
On Thu, Dec 15, 2011 at 8:56 PM, David Nolen wrote:
> On Thu, Dec 15, 2011 at 8:16 PM, Cedric Greevey wrote:
>>
>> public class MangledName implements IFn {
>> public Object invoke () { // unoptimized zero-arg version or arity
>> throw goes here }
>>
On Thu, Dec 15, 2011 at 8:47 PM, Softaddicts
wrote:
> Your approach requires some lifting both in the runtime and the compiler.
I beg your pardon?
> Why not sign a CA, implement it and submit a patch and supporting runtime
> data ?
Sounds like a lot of hoops to jump through. The
direct-primiti
On Thu, Dec 15, 2011 at 8:32 PM, Softaddicts
wrote:
> It's not "silly", it's the fastest way to dispatch fn calls...
Only calls with more than 20 arguments (or via "apply") would need to
be dispatched specially.
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On Thu, Dec 15, 2011 at 8:05 PM, Softaddicts
wrote:
> From a JVM perspective, f(& arglist) is a one arg function.
> Try defining a fn with more than 20 args and you will get the
> "can't specify more than 20 arguments" error.
> This is the maximum supported by the Clojure runtime for "non-opti
On Thu, Dec 15, 2011 at 7:48 PM, David Nolen wrote:
> On Thu, Dec 15, 2011 at 7:43 PM, Cedric Greevey wrote:
>>
>> In that case, I don't see the need for the interface in the
>> non-higher-order case. It could just create a Java method of some
>> class that imple
On Thu, Dec 15, 2011 at 7:29 PM, David Nolen wrote:
> On Thu, Dec 15, 2011 at 7:14 PM, Cedric Greevey wrote:
>>
>> For helper fns, it's unlikely to be necessary to use the function
>> widely in generic contexts, i.e. in a first-class manner, right?
>
> fns with
On Thu, Dec 15, 2011 at 6:51 PM, Softaddicts
wrote:
> Hi Cedric,
>
> Your statement " A limitation on primitive arguments simply cannot be
> applicable to a function with no primitive arguments" does not stand
It is true by axiom. Either the limitation is not actually a
limitation "on primitive a
On Thu, Dec 15, 2011 at 6:33 PM, David Nolen wrote:
> On Thu, Dec 15, 2011 at 6:19 PM, Cedric Greevey wrote:
>>
>> I don't see any logical reason why a function taking only
>> non-primitive arguments cannot have a primitive return value.
>
>
> You need a JVM
On Thu, Dec 15, 2011 at 6:05 PM, David Nolen wrote:
> On Thu, Dec 15, 2011 at 6:01 PM, Cedric Greevey wrote:
>>
>> On Thu, Dec 15, 2011 at 5:59 PM, David Nolen
>> wrote:
>> > On Thu, Dec 15, 2011 at 5:53 PM, Cedric Greevey
>> > wrote:
>> >
On Thu, Dec 15, 2011 at 5:59 PM, David Nolen wrote:
> On Thu, Dec 15, 2011 at 5:53 PM, Cedric Greevey wrote:
>> #> primitives support only 4 or fewer args,
>>
>> But the function isn't *taking* primitives. It's only *returning* a
>> primitive, after t
And a related bug/quirk: I had had
(defn- remm
"Remainder of a modulo b; unlike (rem a b) result is in [0,b) even if a is
negative."
([a b]
(let [r (rem a b)]
(if (< r 0)
(+ r b)
r
and evaluated
(defn- remm
"Remainder of a modulo b; unlike (rem a b) result
(defn dist
"Shortest distance between x,y and x2,y2 in toroidal space of dimensions w,h.
Input coordinates should be in range (0,0)-(w,h). For instance, will give
1.414... if x,y = (0,0) and x2,y2 = (w-1,h-1), as these are diagonally
adjacent."
([x y x2 y2 w h]
(let [x2s [(- x2 w)
On Thu, Dec 15, 2011 at 2:16 PM, Alan Malloy wrote:
> FWIW, much safer is
>
> (defmacro dc
> [sql-cmd]
> `(sql/with-connection db
> ~sql-cmd))
>
> If you use the version with (list) and plain-quoting of the first two
> items, then the namespace resolution is very fragile: it will only
> work
On Thu, Dec 15, 2011 at 1:54 PM, Alan Malloy wrote:
> This will print all the debug information at compile time, which is
> usually not what you want. I have a little macro I use called ?, which
> looks like:
>
> (defmacro ? [x]
> `(let [x# ~x]
> (prn '~x '~'is x#)
> x#))
>
> You could ad
On Wed, Dec 14, 2011 at 11:47 PM, Simone Mosciatti wrote:
> Ok thank you so much, i got it.
>
> Thanks again ;-)
You're welcome.
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On Thu, Dec 15, 2011 at 1:14 PM, Peter Buckley wrote:
> TL;DR I have an extra clojure.core/fn wrapped around the form I want
> returned from my macro. This is my first macro and I'm not sure what's
> wrong, even though the macro "works."
...
> (defmacro dc
> [sql-cmd]
> (list 'sql/with-connect
On Wed, Dec 14, 2011 at 12:04 AM, Simone Mosciatti wrote:
> Thank you so much, just one last thing, why you use a char-array ?
Reader returns chars.
> If I want use a byte-array, and no map all the whole sequence ?
Use an InputStream rather than a reader if you're reading binary files
(or text
On Wed, Dec 14, 2011 at 3:12 AM, Alan Malloy wrote:
> On Dec 13, 8:37 pm, Cedric Greevey wrote:
>> On Tue, Dec 13, 2011 at 11:25 PM, Alan Malloy wrote:
>> > On Dec 13, 7:56 pm, Stephen Compall wrote:
>> >> On Tue, 2011-12-13 at 16:28 -0800, Alan Malloy wrote:
&
On Tue, Dec 13, 2011 at 11:33 PM, Simone Mosciatti wrote:
> Where by now:
> (defn lazy-reader [fl]
> (assert ...)
> (lazy-seq
> (cons (.read fl) (lazy-reader fl
>
> The first one ?
Er, buffering of the I/O is probably preferable, but that would
probably work OK in many cases.
On Tue, Dec 13, 2011 at 11:25 PM, Alan Malloy wrote:
> On Dec 13, 7:56 pm, Stephen Compall wrote:
>> On Tue, 2011-12-13 at 16:28 -0800, Alan Malloy wrote:
>> > As you can see, only as many elements are realized as are needed to
>> > satisfy the user's request.
>>
>> Yes, in the expression (conr (
On Tue, Dec 13, 2011 at 11:12 PM, Simone Mosciatti wrote:
> Ok, now by now i think to have understand...
>
> To do right, I should build a macro similar to let where I pass the
> filename and after execute the body close the stream, right ?
Easier to just use the pre-existing one: with-open.
Som
On Tue, Dec 13, 2011 at 10:14 PM, Simone Mosciatti wrote:
> No, I'm sure to not use all the sequence, so I will follow your second
> advice, but...
>
> Cause of my non-perfect english I've not really understand the last
> part.
> Who is the caller ?
> You suggest something like this:
>
> (let [f
On Tue, Dec 13, 2011 at 2:51 PM, Alan Malloy wrote:
> On Dec 13, 11:36 am, Stuart Sierra
> wrote:
>> It's not clojure.walk, it's bean:
>>
>> user=> (empty (bean "hi"))
>> AbstractMethodError
>> clojure.lang.APersistentMap.empty()Lclojure/lang/IPersistentCollection;
>> clojure.core.proxy$clojure.l
You also probably want more efficiency. Try something closer to:
(defn lazy-reader [filename]
(let [rd (fn [rdr]
(let [buf (char-array 4096)
n (.read rdr buf 0 4096)]
(condp == n
-1 (.close rdr)
0 (recur rdr)
Thanks. I think this is an area where there will hopefully be a bit more
polish in 1.4. Particularly regarding cleanly wrapping code in unchecked
on/off ... though a function that just amounts to #(.intValue ^Number %)
would save everyone writing such closures over and over again when they
need a n
user=> (binding [*unchecked-math* true] (map int [33 77 0x]))
#
The cause of this:
(defn int
"Coerce to int"
{
:inline (fn [x] `(. clojure.lang.RT (~(if *unchecked-math*
'uncheckedIntCast 'intCast) ~x)))
:added "1.0"}
[x] (. clojure.lang.RT (intCast x)))
The inline and non-i
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