On Thursday, November 14, 2013 11:40:08 PM UTC+1, Jacob Mortensen wrote:
I do clojure+clojurescript hobby programming at home. I live in
copenhagen. It seems there is a clojure user group here in copenhagen, but
I havent been able to locate it.
We've started to write some of the
Hi,
Kind of an unusual question, but is anyone in this group aware of a c,
objective-c or LLVM-based implementation of the Clojure persistent data
structures?
- Karl
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On 28/03/2013, at 18.07, Omer Iqbal wrote:
Most foundation objective c data structures are immutable (NSArray,
NSDictionary, NSSet etc), and are most probably more performant than clojure
counterparts, though terribly less elegant.
However there's the clojure-scheme project
Hi,
I have a special non-browser environment which doesn't support a
ClojureScript REPL at the moment.
I was wondering if someone has any insight into how much work it would be
to create an equivalent of the browser-connected repl for a new
environment. That is, I'd like a repl running in the
possible. I've been to meaning to merge some experimental
work I've done creating a Node.js ClojureScript REPL in hopes that some one
would be willing to take it further.
David
On Tue, Nov 27, 2012 at 4:22 PM, Krukow karl.kru...@gmail.com wrote:
Hi,
I have a special non-browser environment
to meaning to merge some experimental
work I've done creating a Node.js ClojureScript REPL in hopes that some one
would be willing to take it further.
David
On Tue, Nov 27, 2012 at 4:22 PM, Krukow karl.kru...@gmail.com wrote:
Hi,
I have a special non-browser environment which doesn't support
Hi,
I'm writing my first ClojureScript program. I defined a protocol for a
query language which I wanted to extend to various data types, including
keywords.
However keywords are strings when it comes to dispatch. Is this a bug, or
by design?
ClojureScript:cljs.user (defprotocol Foo (-a [x]
Thanks both for the responses. I'm extending to string for now, which is
fine for my usecase.
- Karl
On Monday, November 26, 2012 9:28:06 PM UTC+1, Krukow wrote:
Hi,
I'm writing my first ClojureScript program. I defined a protocol for a
query language which I wanted to extend to various
Continuing my exploration of ClojureScript.. I'm writing a small query
language. The syntax consists of data structures like
[:button {:name Login}]
In general maps are interpreted as filters. The keys of the maps correspond
to method on JavaScript objects (that I don't control).
So I want
Ah :) Cheers,
- Karl
On 26/11/2012, at 23.03, David Nolen wrote:
You can use `aget` for that.
(aget object someProperty)
David
On Mon, Nov 26, 2012 at 5:00 PM, Krukow karl.kru...@gmail.com wrote:
Continuing my exploration of ClojureScript.. I'm writing a small query
language
I have a potential customer in Zürich, so I might be around within the next
months.
Who should I contact if I get specific dates, and what kind of intro are
you looking for?
- Karl
On Thursday, September 13, 2012 11:24:42 AM UTC+2, al-maisan wrote:
Hello there!
We are still looking for
On 13/09/2012, at 20.54, Muharem Hrnjadovic wrote:
Hello Karl,
just drop me an email (ideally 2 weeks in advance so we can announce
and promote the event). Since this would be the first meetup about
Clojure I thought we would target beginners to intermediate users.
Sure, will do. I don't
Regarding those...
Some time ago I created a project containing only the persistent data
structures for use with Java et al.
https://github.com/krukow/clj-ds
It is the data structures only so no bootstrap penalty. There are also Java'ish
improvements like basic Generics and improved
Sorry to ask what may be an obvious question to you. But what is a good way of
embedding a swank server inside a production app? I'm kind of an emacs
beginning and in development I just do lein swank and slime-connect from Emacs-
that works fine.
If I'm embedding swank clojure server in
Sorry, and thanks for the info.
/Karl
On 25/05/2012, at 22.46, Phil Hagelberg wrote:
On Fri, May 25, 2012 at 1:41 PM, Karl Krukow karl.kru...@gmail.com wrote:
If I'm embedding swank clojure server in non-development, the code would
need to start up swank - how would I do that?
Just add
Thanks Sean for the detailed information. This will be really useful to me.
/Karl
On 25/05/2012, at 23.30, Sean Corfield wrote:
On Fri, May 25, 2012 at 1:46 PM, Phil Hagelberg p...@hagelb.org wrote:
On Fri, May 25, 2012 at 1:41 PM, Karl Krukow karl.kru...@gmail.com wrote:
If I'm embedding
Thanks. I'm quite interested in this.
I've been using sumo for some time, and that has been working out fine for
the simple use cases I have.
Would you mind giving your opinion on how these libraries compare
(tradeoffs)
On Wednesday, May 16, 2012 4:23:16 PM UTC+2, Michael Klishin wrote:
I
I was wondering what a good workflow for working with ClojureScript
One would be.
For regular Clojure, I use Emacs with swank-clojure (using Sam's Live
coding emacs, which is great for Emacs beginners,
https://github.com/overtone/live-coding-emacs). That works quite well
for me, giving a good
On Jan 15, 3:32 pm, Brenton bashw...@gmail.com wrote:
We found a couple of problems with theClojureScriptREPL while
working onOneand will address them soon. If you confirm that this is
the problem, please let us know. Also, feel free to add an issue to
JIRA with the steps to reproduce.
[snip]
On Tuesday, November 15, 2011, Justin Balthrop jus...@justinbalthrop.com
wrote:
My understanding from the talk was that RRB-Trees have performance
identical to PersistentVector as long as you don't concat or split
them. So why not just replace the PersistentVector implementation with
an
On 15/11/2011, at 19.13, Justin Balthrop wrote:
It wouldn't change the performance profile of existing programs because
currently there isn't a way to concat two vectors and get a new vector. I
don't envision changing the behavior of clojure.core/concat, that should
still return a seq. It
Hi,
Yes, Phil Bagwell presented that at the Conj.
I'm really interested in this stuff, so as an exercise in Clojure, I've started
thinking about how to implement it. At first I'll try and do it without looking
at Scala - if I get stuck I might peek a bit :)
If you're interested, I'll put it
By the way, I don''t see it as a replacement for PersistentVector, but
rather as an additional data structure, that could perhaps be put
somewhere in contrib if it turns out well.
/Karl
On Nov 13, 9:54 am, Karl Krukow karl.kru...@gmail.com wrote:
Hi,
Yes, Phil Bagwell presented
not sure what the
best way to implement low-level stuff like this is in Clojure.
Once I get my head around the details of the algorithm, and I have a working
Java version, I'll try and port it to Clojure (and I'll probably ask here for
advice).
/Karl
On Sun, Nov 13, 2011 at 10:02 AM, Krukow
primitive types.
David
On Sun, Nov 13, 2011 at 12:38 PM, Karl Krukow karl.kru...@gmail.com wrote:
On 13/11/2011, at 18.14, David Nolen wrote:
This would be awesome. From his talk it sounds like it shouldn't replace
PersistentVector at all, in fact you should be able to share structure
On Oct 25, 5:11 pm, Fogus mefo...@gmail.com wrote:
This should be epic.
Indeed. Please sign me up for:
* ClojureScript
* Pallet
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On May 9, 12:09 am, David Nolen dnolen.li...@gmail.com wrote:
On Sun, May 8, 2011 at 4:43 PM, Dmitry Kakurin
dmitry.kaku...@gmail.comwrote:
Very well, something along these lines would be my guess too.
But that would mean that in case 2 protocols are no faster
than multimethods.
They
On May 7, 11:28 pm, Dmitry Kakurin dmitry.kaku...@gmail.com wrote:
Let me rephrase my question to avoid unfortunate confusion with
standard count function:
Suppose I have extended my own IMyCountable protocol with a
single mycount method to String class. What happens when I call
(mycount
On Apr 30, 8:16 pm, Nathan Sorenson n...@sfu.ca wrote:
Yes but the contract of subvec is that it returns a persistent
vector and the resulting data structure returns true under the
vector? predicate. I know that subvec returns a different type
because I've looked at the Java source code but
adopted
by other languages (Scala, Erjang, Seph) and projects which may be
incompatible with the EPL license. Personally, I am interested in
releasing clj-ds [1] as MIT licensed, but only if acceptable by Rich.
Thanks.
/Karl
http://github.com/krukow/clj-ds
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On Aug 11, 7:03 pm, Shantanu Kumar kumar.shant...@gmail.com wrote:
I tried to assign a data type to a var and then instantiate it using
the var, but it doesn't seem to work:
user= (defrecord X [])
user.X
user= (X.)
#:user.X{}
user= X
user.X
user= (def hey X)
#'user/hey
user=
On Aug 4, 5:33 pm, Alex Tkachman alex.tkach...@gmail.com wrote:
Guys,
Thanks fo reference. I am still be curious if it should be done
directly in Clojure runtime and available if clojure.jar is in
classpath
Hello Alex,
You can easily use clojure.jar but there are a number of
On Aug 4, 3:51 pm, Matt Fowles matt.fow...@gmail.com wrote:
Alex~
There is a project on github that does exactly this.
http://github.com/krukow/clj-ds
I don't know much about the current state of it, but I have plans in the
next month or so to try it out at work.
http://github.com
On Aug 2, 3:50 pm, Baishampayan Ghose b.gh...@gmail.com wrote:
Hello,
[snip..]
The documentation says defrecord provides a complete implementation
of a persistent map. If a record is analogous to a map, why can't we
treat it as one?
If it's not a bug, what is the rationale behind it?
On Jul 23, 6:19 am, George Jahad cloj...@blackbirdsystems.net wrote:
[snip]
as i explained above you have to use swank/break with case 3.
in addition to these 4 cases, it sounds like you are having a problem
viewing the local java object, which is why i suggested using the
vanilla
On Jul 23, 3:59 pm, Hugo Duncan hugodun...@users.sourceforge.net
wrote:
On Fri, 23 Jul 2010 02:35:13 -0400, Krukow karl.kru...@gmail.com wrote:
So I guess the problem is in swank/break.
Should be fixed in 1.3.0-SNAPSHOT now.
--
Hugo Duncan
I've verified that it works here. Thanks
)
java.lang.Throwable: Exiting back to main repl from debug-repl
dr-1-1001 = b
foo
dr-1-1001 = c
bar
dr-1-1001 =
so it seems I can't escape back to the main repl.
3) From a shell run:
krukow:~/workspaces/trifork/intrafoo_clj$ lein swank
Listening for transport dt_socket at address: 8030
WARNING: group
On Jul 21, 4:02 pm, Ramakrishnan Muthukrishnan vu3...@gmail.com
wrote:
On Wed, Jul 21, 2010 at 6:04 PM, Krukow karl.kru...@gmail.com wrote:
0: com.trifork.intrafoo.clj.extract_contacts
$extract_all.invoke(NO_SOURCE_FILE:1)
Locals:
pref = /Users/krukow/workspaces/trifork
become the current repl in the Emacs session.
Example.
krukow:~/workspaces/trifork/intrafoo_clj$ cat project.clj
...
:dev-dependencies [[swank-clojure 1.2.1]
[org.clojars.gjahad/debug-repl 0.3.0-SNAPSHOT]
[cdt 1.0.1-SNAPSHOT] ]
:jvm-opts
[-
agentlib:jdwp
On Jul 21, 8:47 am, Ramakrishnan Muthukrishnan vu3...@gmail.com
wrote:
On Wed, Jul 21, 2010 at 11:52 AM, Krukow karl.kru...@gmail.com wrote:
I am interested in getting the combination of Emacs+slime+swank-
clojure, alex-and-georges.debug-repl and clojure debugging toolkit to
work together
On Jul 11, 11:55 am, stewart setor...@gmail.com wrote:
Hi All,
Has anybody considered implementing Clojure on BEAM. Are there any
works or current attempts currently available?
In your view where are the real trip ups for this to happen.
Instead you should take a look at Erjang
/karl
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On Jul 4, 8:51 am, Adrian Cuthbertson adrian.cuthbert...@gmail.com
wrote:
I've tried every permutation of type hinting, but cannot get rid of
those warnings.
Any ideas?
-Thanks, Adrian.
Notice this:
user (set! *warn-on-reflection* true)
true
user (import '(java.io File))
java.io.File
On Jun 8, 3:11 pm, B Smith-Mannschott bsmith.o...@gmail.com wrote:
Yes please!
OK :)
One nit: you probably didn't mean to check in your build products. The
classes directory is full of *.class files.
No, I didn't want the class files - I was a bit fast on the commit.
I'll clean it up.
/circuitbreaker-clojure-1-2/
Code: http://github.com/krukow/clojure-circuit-breaker
Specifically, what I'd like to know is:
- How to define and access member data fields -also mutable in case
of deftype- to my ADTs.
The example is there for immutable fields. Why do you need mutability
On May 28, 9:59 pm, Sina K. Heshmati s...@khakbaz.com wrote:
Hi Krukow,
[snip]
The only member data _I'm_ able find are the ones that are passed to the
default constructor, namely at the time that the abstraction is reified. What
if I'd have to give create a member field
at github:
-
http://github.com/krukow/clojure-circuit-breaker/blob/master/src/net/higher_order/integration/circuit_breaker/states.clj
-
http://github.com/krukow/clojure-circuit-breaker/blob/master/src/net/higher_order/integration/circuit_breaker/atomic.clj
Ideas being that (wrap-with (fn ..) (make
On May 5, 2:54 pm, Robert Luo robort...@gmail.com wrote:
[snip]
(repeated-seq #(range % 5) 0)
the elements are: 0 1 2 3 4 4 5 6 7 8 8 ...
I think you mean,
(def s (repeated-seq #(range % (+ % 5)) 0) )
However, I want to get rid of the duplicated index element (4, 8 etc),
e.g.
To
On May 5, 2:40 pm, klathrop gamingscien...@gmail.com wrote:
[snip]
Its the RecommenderBuilder that's giving me trouble. I've tried using
proxy with no luck. Any suggestions?
Can you post the code that fails?
/Karl
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On Apr 22, 6:53 pm, Rich Hickey richhic...@gmail.com wrote:
[snip..]
Feedback and errata welcome as always,
1) Typo on http://clojure.org/protocols:
Section Basics
defprotocol will automatically generate a corresponding interface,
with the same name as the protocol, i.e. given a protocol
On Apr 2, 3:28 pm, Chas Emerick cemer...@snowtide.com wrote:
As Clojure moves towards being self-hosted, fewer and fewer of the
data structures will be implemented in Java, thereby ensuring
dependence on the Clojure runtime. Just FYI.
Yes, I've realized that as well :-) I would have to
On Apr 5, 3:06 pm, ineol leo.l...@gmail.com wrote:
It has nothing to do with Clojure but your colleague can look at the
Google collection library that contains an
ImmutableSet.http://guava-libraries.googlecode.com/svn/trunk/javadoc/com/google/co...
Yes, there is also Scalas data structures
Hello,
a colleague of mine asked me a question about clojures set
implementation performance. He needed an immutable set on the jvm
platform for a Java/Scala project, and since I've been saying that
Clojures data structures have good performance he tried clojures set.
He was dissapointed though
On Jan 22, 2:27 am, ajay gopalakrishnan ajgop...@gmail.com wrote:
Is this the preferred way of debugging in Clojure?
Please don't top post.
I've heard people have success with regular debuggers, e.g. JSwat,
although I haven't tried this myself...
/Karl
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On Jan 10, 6:21 pm, Dragan Djuric draga...@gmail.com wrote:
Is this on purpose (and what is the reason), or it's just that nobody
thought that would be useful?
Of course, I am talking about the read-only access to the history.
[snip...]
To minimize memory consumption, refs only keep history
On Jan 2, 4:03 pm, ianp ian.phill...@gmail.com wrote:
snip
Yes, exactly. This is the problem with a Java based version (at least
with one that uses the standard collections libraries). At the very
least your reporting function would have to make a complete copy of
the world state while
On Dec 17, 9:09 pm, Rich Hickey richhic...@gmail.com wrote:
There is now a release candidate for Clojure 1.1:
http://clojure.googlecode.com/files/clojure-1.1.0-rc1.zip
and also a new 1.1.x branch in git corresponding to the release.
Please try these out ASAP and provide feedback here.
On Dec 16, 6:33 pm, tsuraan tsur...@gmail.com wrote:
Does anybody have a download link for the QCon talk that is linked
from the clojure front page? I tend to use platforms where Flash
support is even worse than normal, whereas mplayer tends to be very
good at playing videos on every machine
Doh...
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On Dec 11, 12:21 am, Dragan Djuric draga...@gmail.com wrote:
HI,
I have just watched Rich's QCon talk and in some parts he is referring
to the slides that are not displayed in the video. Of, course, the
talk is perfectly fine without that, but I need to understand some
specific tricky
I am writing a function that has to wrap other code. One simple
approach is to do
user (defn wrap-fun [f]
(fn [ args]
(println pre-processing)
(let [res (apply f args)]
(println post-processing)
res)))
#'user/wrap-fun
user (def w (wrap-fun (fn
Thanks for sharing the insights.
/Karl
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To
On Dec 1, 2:42 am, Rich Hickey richhic...@gmail.com wrote:
I have done a lot of work on performance, and refined the design. The
big news is that you can now directly implement a protocol inside a
deftype, and you can also reify protocols. This cements protocols as
the superior way to model
On Dec 1, 10:56 pm, Rich Hickey richhic...@gmail.com wrote:
[snip]
There are 2 ways to make a deftype reach a protocol. First, you can
implement the protocol directly in the deftype/reify, supplying the
protocol where you do interfaces, and the methods of the protocol as
methods of the type.
On Nov 24, 12:01 pm, kony kulakow...@gmail.com wrote:
Hi,
I found that resolve does not work correctly (I guess) when it is
called from other thread than main:
I guess your new thread also has the root binding for *ns* the current
namespace, which apparently is core
user= (.start (new
Three concurrent replies. We'd be better off using locks :-)
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On Nov 14, 5:42 pm, André Thieme splendidl...@googlemail.com wrote:
But in real programs things are not so easy. We have refs in refs.
This is just a thought experiment. But what about actually having refs
in refs? I'm not sure if I am reinventing mutable object here, so
please shoot me down
On Nov 24, 7:50 pm, Krukow karl.kru...@gmail.com wrote:
On Nov 14, 5:42 pm, André Thieme splendidl...@googlemail.com wrote:
But in real programs things are not so easy. We have refs in refs.
This is just a thought experiment. But what about actually having refs
in refs? I'm not sure if I
On Nov 24, 9:45 pm, kony kulakow...@gmail.com wrote:
On 24 Lis, 18:07, Krukow karl.kru...@gmail.com wrote:
Three concurrent replies. We'd be better off using locks :-)
Three concurrent replies but each of them brings something new ;)
Thank you very much for all of them!
... what
On Nov 20, 5:24 pm, Rich Hickey richhic...@gmail.com wrote:
Yup. The fixed field access to deftypes via keyword literal lookup is
the fastest offered by any Clojure data structure.
Rich
While we are talking performance. Is there a simple way to explain the
performance characteristics of
:dependencies [[org.clojars.krukow/clojure-1.1.0-alpha-snapshot
75cd05080f7260c54007d7728fb280ae53b56f63]])
I ran deps:
krukow:~/Projects/clojure/circuitbreaker$ lein deps
[copy] Copying 1 file to /Users/krukow/Projects/clojure/
circuitbreaker/lib
krukow:~/Projects/clojure/circuitbreaker$ ls
On Nov 12, 1:10 pm, Rich Hickey richhic...@gmail.com wrote:
An early version of the code for a few important new language
features, datatypes[1] and protocols[2] is now available in the 'new'
branch[3]. Note also that the build system[4] has builds of the new
branch, and that the new branch
and protocol functions:
krukow:~/emacs/clojure/clojure$ rlwrap java -cp
clojure-1.1.0-75cd05080f7260c54007d7728fb280ae53b56f63.jar
clojure.main
Clojure 1.1.0-alpha-SNAPSHOT
user= (defprotocol P (foo [x args]))
P
user= (deftype T [x])
#'user/T
user= (extend ::T P {:foo (fn [x args] args)})
nil
user= (foo
On Nov 24, 4:55 am, Allen Rohner aroh...@gmail.com wrote:
The first stumbling point I reached is that deftypes provide an
automatic implementation for IPersistentMap, but not IFn. I attempted
to write (instance key), which exploded, but (key instance) works just
fine. My existing code uses
On Nov 20, 8:51 pm, Chouser chou...@gmail.com wrote:
On Thu, Nov 19, 2009 at 12:39 PM, Krukow karl.kru...@gmail.com wrote:
[snip]
I guess I am just asking if the performance guarantees are those I
would expect of Clojure (i.e., too fast ;-))
This is definitely still too fast. In fact
On Nov 19, 12:01 am, samppi rbysam...@gmail.com wrote:
Question: are the general mechanisms for accessing and setting fields
their keywords and assoc respectively:
(deftype Bar [a b c d e])
(def b (Bar 1 2 3 4 5))
(:c b)
(def c (assoc b :e 2))
Does (:c b) and (assoc b :e 2) take
On Nov 12, 1:10 pm, Rich Hickey richhic...@gmail.com wrote:
An early version of the code for a few important new language
features, datatypes[1] and protocols[2] is now available in the 'new'
branch[3]. Note also that the build system[4] has builds of the new
branch, and that the new branch
On Oct 10, 7:10 am, Paul Nakata paulnak...@gmail.com wrote:
I've tried the ELPA install method and installing with sources from
git and get this error. I'm currently set up with everything in ~/src/
and I've pulled everything from git using the directions
On Oct 8, 3:43 am, Timothy Pratley timothyprat...@gmail.com wrote:
Atoms can't do this, as they are synchronous (called and returned
immediately) - hence the warning about potentially being called
multiple times.
The reason that swap! may fail is that it is performing a compare-
and-swap
On Oct 1, 10:17 pm, John Harrop jharrop...@gmail.com wrote:
@conference{hickey2008clojure,
title={{The Clojure programming language}},
author={Hickey, R.},
booktitle={Proceedings of the 2008 symposium on Dynamic languages},
year={2008},
organization={ACM New York, NY, USA}
}
On Sep 18, 6:24 am, Wilson MacGyver wmacgy...@gmail.com wrote:
Hmmm, your solution produces nils in REPL.
user= (map #(printf Happy Birthday %s\n (if (= 2 %) Dear XXX To
You)) (range 4))
(Happy Birthday To You
Happy Birthday To You
nil Happy Birthday Dear XXX
nil Happy Birthday To You
On Sep 16, 11:15 am, Christophe Grand christo...@cgrand.net wrote:
I think you managed to produce a deadlock :-(
thread 1 is commiting and has a write lock on a1
thread 2 is commiting and has a write lock on a2
thread1 tries to acquire a read lock on a2 (in the validator) and blocks
On Sep 16, 10:06 pm, Rich Hickey richhic...@gmail.com wrote:
On Sep 16, 11:39 am, Stuart Halloway stuart.hallo...@gmail.com
wrote:
The docs could be more clear, but if validate-fn must be side effect
free then it certainly can't look at any other refs.
Yes. The docs should say the
On Sep 17, 4:46 am, Hugh Aguilar hugoagui...@rosycrew.com wrote:
Greetings. I am interested in Clojure and will be reading the mailing
list to find out what you folks are up to.
My concern right now is that I don't know Java. Is this a prerequisite
for learning Clojure? Can I program in
After a discussion in dcug about the write-skew anomaly, I wanted to
write a program exhibiting the anomaly, together with a similar
program using ensure to eliminate it.
My program doesn't work: it exhibits the anomaly, but ensure doesn't
fix it, and neither does adding a validator to the refs.
On Sep 15, 10:23 pm, Mark Volkmann r.mark.volkm...@gmail.com wrote:
I think the problem is that you only ensure one of the Refs. If you
want to make sure that a condition between multiple Refs isn't
violated, you need to sure all of them. Otherwise other transactions
will be free to modify
On Sep 16, 12:32 am, Timothy Pratley timothyprat...@gmail.com wrote:
I ran program #1 and #2 on Clojure 1.1.0-alpha-SNAPSHOT from git
- program #1 output skew
- program #2 no output
What version are you using? Could be something that's been fixed
recently.
I was running a fairly recent,
I am digging somewhat into Clojure internals for a talk I'm doing. Now
I've reached the LockingTransaction class, and have a few questions, I
hope someone can answer.
In some of the Clojure presentations it says that Readers never
impede writers/readers, writers
never impede readers. What does
On Sep 5, 8:18 pm, Rich Hickey richhic...@gmail.com wrote:
Given sufficient history, readers will not be retried due to the
activity of writers. It is true that while history is being
dynamically acquired there may be retries. Unless you have some
pathological transaction relationships,
On Sep 5, 6:55 pm, Mark Volkmann r.mark.volkm...@gmail.com wrote:
I have lots of detail on this in my article
athttp://ociweb.com/mark/stm/article.html.
Yes, it's bookmarked in the TO READ group :-) I just want to be
precise in my presentation.
I'd say it means block as in wait until the
I was thinking about the capability of changing production systems on
the fly. E.g. by having an accessible repl in a running production
system.
If you have a bug in a function, you can fix it by re-def'ing it -
that is great. However, suppose you want to do a system upgrade where
you want to
On Sep 4, 1:38 pm, Christophe Grand christo...@cgrand.net wrote:
You have to be prepared to deal with potential inconsistencies: a
closure (or any object) can hold a reference to the value of a
function.
OK - I realized this already for running threads, e.g., executing a
function where a var
On Sep 2, 7:02 pm, tmountain tinymount...@gmail.com wrote:
(defn generate-chain [source]
(loop [the-list (map #(list (first (split-at 2 %)) (last %))
(partition 3 1 (.split (.replace source \n
) )))
res (hash-map)]
(if (empty? the-list)
res
On Sep 2, 5:02 pm, Krukow karl.kru...@gmail.com wrote:
Or if you like point-free style
(into {}
(filter (comp even? second)
{:dog 5 :cat 4 :mouse 7 :cow 6}))
=
{:cat 4, :cow 6}
Saving a few chars, and perhaps more readable:
user (into {}
(filter (comp even
On Sep 2, 1:44 am, Richard Newman holyg...@gmail.com wrote:
Conrad,
(into {}
(filter (fn [[key val]]
(even? val))
{:dog 5 :cat 4 :mouse 7 :cow 6}))
=
{:cat 4, :cow 6}
Or if you like point-free style
(into {}
(filter (comp even? second)
Hello,
At some point I needed at flatten function taking a list of atomic
elements or nested lists, and producting a flat list of only atomic
elements (in the same order). It should be lazy.
This is what I came up with. Can anyone see a more elegant solution (I
feel I am working low-level
On Sep 3, 1:13 am, Sudish Joseph sud...@gmail.com wrote:
The other solutions seem higher level, but it's worth noting that
destructuring -- (let [[x xs] lst] ...) -- uses next and is therefore
not fully lazy in that you will peek ahead by one into the lazy
sequence, so to speak. You have
On Sep 1, 11:10 am, Lauri Pesonen lauri.peso...@iki.fi wrote:
snip
I just wanted to point out that the Java Properties class inherits
Hashtable which is already (into) compatible, i.e.
user (let [props (. System getProperties)]
((into {} props) os.arch))
x86
Ok. That is certainly
I have two minor minor suggestions for Clojure changes.
1) Consider this function:
user (set! *warn-on-reflection* true)
true
user (defn reader-from-classpath [s]
(- (.getResourceAsStream java.lang.String s)
(java.io.InputStreamReader.)
(java.io.BufferedReader.)))
Reflection
On Aug 31, 4:44 pm, wangzx wangzaixi...@gmail.com wrote:
Is there other APIs like the Sequence but provide stream-like API?
You can try this, which I've used on short files recently:
(defn #^Class class-identity [#^Class c] c)
(defn #^java.io.BufferedReader reader-from-classpath [#^String s]
Dates are now final for the Copenhagen and Aarhus Clojure meetings.
Trifork and Azul Systems are sponsoring the events: Trifork provides a
room, some drinks and sandwiches, and Azul is letting us run Clojure
on one of their large boxes (864 cores, loads of RAM ;-). I will be
trying to reproduce
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