Bruce Durling escribió:
> Excellent news. I look forward to using Monger & friend together.
Bruce,
I just pushed initial documentation for Ring session stores:
http://clojuremongodb.info/articles/integration.html
There is nothing specific to Friend but I hope this will be useful to you. I
will
I fully support Warren's point of view. I'm also unhappy with current
behaviour of sequence functions (more accurate: I think it can be made even
better).
In my mind, protocols (interfaces?) based, polymorphic core functions is
just what we need. Moreover, similar request has been done already
Just an idea: predicate dispatch can be combined with protocols into one
thing, eliminating the need for defrecord-like things at all. Low level
types defined with deftype, higher-level abstractions defined with that
"dynamic protocols" thing. It'd be fun to play with it :)
Don't you think the
How do you think the conditionals can be removed?
On Sunday, July 1, 2012, Vinzent wrote:
> Just an idea: predicate dispatch can be combined with protocols into one
> thing, eliminating the need for defrecord-like things at all. Low level
> types defined with deftype, higher-level abstractions de
Extend on nil, IIndexed and default (I realize that
it's currently impossible in cljs).
воскресенье, 1 июля 2012 г., 18:39:27 UTC+6 пользователь David Nolen
написал:
>
> How do you think the conditionals can be removed?
>
> On Sunday, July 1, 2012, Vinzent wrote:
>
>> Just an idea: predicate dis
This gist https://gist.github.com/3019801 shows a lein cljsbuild failure
with the error:
Could not locate clojure/instant__init.class or clojure/instant.clj on
classpath
Does anybody have any idea why this would be happening and what to do to
fix it?
Thanks,
-e
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On 1 July 2012 15:04, Vinzent wrote:
> Extend on nil, IIndexed and default (I realize that
> it's currently impossible in cljs).
Actually it is possible and it is how things were originally
implemented. The move to the current implementation happened as part
of an effort to make things faster. Th
On Sun, Jul 1, 2012 at 9:04 AM, Vinzent wrote:
> Extend on nil, IIndexed and default (I realize that it's currently
> impossible in cljs).
IIndexed is the protocol that maps to nth. We already extend IIndexed
to nil. Extending default to IIndexed leads to horrible things like
the following:
(ind
Additionally I would like to note that Haskell's ad hoc polymorphism
solution, the system of type classes, allows for extensions predicated
on a type class already being implemented:
-- no dependencies on other type classes
instance SomeClass SomeType where
...
-- depend on OtherClass being imp
On Sun, Jul 1, 2012 at 10:31 AM, Michał Marczyk
wrote:
> Additionally I would like to note that Haskell's ad hoc polymorphism
> solution, the system of type classes, allows for extensions predicated
> on a type class already being implemented:
>
> -- no dependencies on other type classes
> instanc
On 1 July 2012 16:25, David Nolen wrote:
> On Sun, Jul 1, 2012 at 9:04 AM, Vinzent wrote:
>> Extend on nil, IIndexed and default (I realize that it's currently
>> impossible in cljs).
>
> IIndexed is the protocol that maps to nth. We already extend IIndexed
> to nil. Extending default to IIndexed
On 1 July 2012 16:39, David Nolen wrote:
> On Sun, Jul 1, 2012 at 10:31 AM, Michał Marczyk
> wrote:
>> Additionally I would like to note that Haskell's ad hoc polymorphism
>> solution, the system of type classes, allows for extensions predicated
>> on a type class already being implemented:
>>
>>
You need to upgrade to clojure 1.4.0 or later. I don't know if that
was by design, but it solved it for me.
On Sun, Jul 1, 2012 at 9:52 AM, Eric Harris-Braun
wrote:
> This gist https://gist.github.com/3019801 shows a lein cljsbuild failure
> with the error:
>
> Could not locate clojure/instant__i
Somebody asks me to add handling of Java array in clj-cc/last. But I am
confused what will be the type of Java array in Clojure. Fox example:
(type (.toCharArray "Clojure")) => [C ;; Note: it looks like
garbage. but that is what I actually got
(isa? (type (.toCharArray "Clojure")) j
"Big Ivan" teaches Clojure how to parse, validate and construct BIC
and IBAN strings. (BIC and IBAN are both structured identifiers used
in banking.)
http://github.com/bpsm/big-ivan
http://bpsm.github.com/big-ivan/index.html
https://clojars.org/org.clojars.bpsm/big-ivan
As libraries g
If you want to check if something is an array:
(.. x getClass isArray)
David
On Sun, Jul 1, 2012 at 11:35 AM, Warren Lynn wrote:
> Somebody asks me to add handling of Java array in clj-cc/last. But I am
> confused what will be the type of Java array in Clojure. Fox example:
>
> (type (.toCharAr
So if I want to extend a protocol to all Java arrays, is there a single
type I can use? Sounds like not. So I need to extend the protocols to char
arrays, int arrays and etc?
On Sunday, July 1, 2012 12:20:19 PM UTC-4, dennis wrote:
>
> (type (.toCharArray "Clojure")) is a class, [C means an a
The set of Java array types is open. You can however extend array
classes as you encounter them at runtime.
http://dosync.posterous.com/51626638
David
On Sun, Jul 1, 2012 at 1:17 PM, Warren Lynn wrote:
>
> So if I want to extend a protocol to all Java arrays, is there a single type
> I can use?
Wow, this thread was exhausting :) This reply is not to anyone in particular,
just tagging on at the end (hint).
It is quite easy to come up to some part of Clojure, with some need, and some
current perspective, and find it unsatisfying. It certainly is not perfect. But
a good presumption is th
The idea of dynamic protocol extension on types is very cool. I use that in
adding support of Java arrays in 'last'. Thank you.
On Sunday, July 1, 2012 1:20:24 PM UTC-4, David Nolen wrote:
>
> The set of Java array types is open. You can however extend array
> classes as you encounter them at ru
Right now
(last []) => nil
(last [nil]) => nil
So there is no way to differentiate these two (except with some
emptiness checking). In my opinion (last []) should throw an
exception, because that's when last does not apply. From another point
of view, there are two cases:
1. The local semantics
It works as I expect, and I would be disappointed if it did throw.
Sent from my iPhone
On Jul 1, 2012, at 3:47 PM, Warren Lynn wrote:
> Right now
>
> (last []) => nil
> (last [nil]) => nil
>
> So there is no way to differentiate these two (except with some
> emptiness checking). In my opinio
i'd do (actually, i did) it like this:
(my-special-last coll) -> returns the last element or throws an
exception if there is none
(my-special-last coll if-empty) -> in case of an empty collections,
ifEmpty is returned
Am 01.07.2012 21:47, schrieb Warren Lynn:
> Right now
>
> (last []) => nil
>
I promised I won't post more on this thread. But Rich is here and I think I
can grant myself an excuse to post just one more. End of it, I promise. :-)
First, although Rich does not think so, I myself feel this topic is very
important as it is not just about "last", It touches some fundamental
Clojure avoid as much as possible making nil or emptiness a special case
requiring the caller to test it before calling a function.
I would like this to remain like that after years of testing null in Java before
doing anything else on a object to prevent exceptions.
This is a design decision tak
No, I think it's worthwhile to think about a more fundamental
semantic. What does nil mean? Although it's often misused, nil is
provided so that a function can simply respond, "I can't answer your
question". That's the perfect response from (last c) when c is empty,
whether c normally contains nil
On Sun, Jul 1, 2012 at 12:47 PM, Warren Lynn wrote:
> Right now
>
> (last []) => nil
> (last [nil]) => nil
>
> So there is no way to differentiate these two (except with some
> emptiness checking). In my opinion (last []) should throw an
> exception, because that's when last does not apply.
That
Returning nil is consistent across seq functions and play well with when,
if-let, when-let, just to name a few...
On Jul 2, 2012 12:12 AM, "Sean Corfield" wrote:
> On Sun, Jul 1, 2012 at 12:47 PM, Warren Lynn wrote:
> > Right now
> >
> > (last []) => nil
> > (last [nil]) => nil
> >
> > So there
Clojurians,
Interesting post here on different GC settings for Java 7. Does anyone
have any tips/experience about what settings have worked best for them
with clojure and under what circumstances?
http://www.fasterj.com/articles/oraclecollectors1.shtml
cheers,
Bruce
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On 2 July 2012 00:12, Sean Corfield wrote:
> user> (map inc nil)
> ()
> user> (map inc [])
> nil
Actually that's also (). Agreed on the point of the message.
Cheers,
M.
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On Sun, Jul 1, 2012 at 4:18 PM, Michał Marczyk wrote:
> On 2 July 2012 00:12, Sean Corfield wrote:
>> user> (map inc nil)
>> ()
>> user> (map inc [])
>> nil
>
> Actually that's also (). Agreed on the point of the message.
Sorry, copy'n'paste error :) Glad the point was obvious...
--
Sean A Corf
On Sunday, July 1, 2012 4:21:02 PM UTC-4, Dennis Haupt wrote:
>
> i'd do (actually, i did) it like this:
> (my-special-last coll) -> returns the last element or throws an
> exception if there is none
> (my-special-last coll if-empty) -> in case of an empty collections,
> ifEmpty is returned
>
That would be horribly inconsistent with the rest of Clojure, IMO:
Sure it will be. That is why I said this is an academic one, and I don't
expect any change to current one.
> Warren, this and some of your other issues with how Clojure works
> makes me curious about your language background.
Try...
(.isArray (type (.toCharArray "Clojure"))) => true
On Sunday, July 1, 2012 9:35:38 AM UTC-6, Warren Lynn wrote:
>
> Somebody asks me to add handling of Java array in clj-cc/last. But I am
> confused what will be the type of Java array in Clojure. Fox example:
>
> (type (.toCharArray "Cloj
I am trying to run `lein cljsbuild once` and am getting the exception trace
shown at the bottom of this post.
I have a Noir/ClojureScript project on OS X 10.7.4, Java 1.6.0_33.
My project.clj contains:
:dev-dependencies [[lein-cljsbuild "0.2.2"]]
:cljsbuild {
:source-
i.e. what do I not understand about map and/or promises.
(import '(java.util.concurrent Executors))
(def pool (Executors/newFixedThreadPool 10))
(defn sleep-for [t] (. Thread (sleep t)) t)
(defn fastest-first-map [f coll]
(let [ps (map (fn [_] (promise)) (range (count coll)))
a (agent
Hello everybody this is my first post.
I am new to clojure and Java. Although t i have been programming in
other platforms for 15+ years.
I started by reading Chad Emerick book. Now i am trying to setup a computer
to use for Clojure development environment using eclipse. I had previously
downl
Hey All,
This is more than likely a newbie question, so my apologies if this is not
directly clojure related.
I'm not sure if this is a Java or Clojure specific issue, my guess is both.
I'm trying to do some probability calculations with both very large and
very small numbers. The function I'm
Hello,
I'm trying to build an user interface in Clojurescript using the Google
Closure library.
It appears that the idiomatic way to use the goog.ui package is to create
subclasses of goog.ui.Component.
Firstly, is this possible in Clojurescript ? This kind of approach doesn't
appear to wo
All,
I've been playing with Clojure and found this
website, http://www.lisperati.com/clojure-spels/casting.html. Typed the
code into Clojure 1.4.0 and got the issue below. Here is the code in
question.
(defmacro defspel [& rest] `(defmacro ~@rest))
(defspel game-action [command subj obj p
On Fri, Jun 29, 2012 at 9:08 AM, Danny O' Connor wrote:
> Hello,
>
> I'm trying to build an user interface in Clojurescript using the Google
> Closure library.
>
> It appears that the idiomatic way to use the goog.ui package is to create
> subclasses of goog.ui.Component.
>
> Firstly, is this poss
On Sat, 2012-06-30 at 17:46 -0700, Tim R wrote:
> i.e. what do I not understand about map and/or promises.
That the following test is misdirected.
> (chunked-seq? (do-it))
> ;; => false
user> (chunked-seq? (map identity (range 5)))
false
user> (chunked-seq? (seq (map identity (range 5
true
I get an error on a declared CLJS atom when compiled :
Uncaught TypeError: Cannot read property 'validator' of undefined
But the metadata :validator is not compulsory
Hi,
This might be a naive question, but calling this code causes a "hung"
program for me, I would appreciate any suggestions on the right way to do
it:
user=> (dotimes [n 5] (println "Input:") (read-line))
Input:
abc
Input:
def
# /hangs/
Regards,
Swaroop
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