I took part of the goal to be that specs themselves would remain
compatible, so an old set of specs wouldn't start failing on data that
conforms to a new but compatible set of specs. That sort of compatibility
isn't possible when you go from disallowing something to allowing it.
On Tuesday, Nov
Reordering definitely matters:
StepA: write to x
StepB: read from x
StepB: read from x
StepA: write to x
On Wednesday, April 12, 2017 at 7:15:09 AM UTC-5, Léo Noel wrote:
>
> I could have one thread that invokes a transduce step on odd seconds and
>> another that invokes on even seconds. Or som
f the next. All these techniques ensure
> visibility of unsynchronized variables between two successive steps, even
> when multiple threads are involved.
>
>
> On Tuesday, April 11, 2017 at 1:36:30 PM UTC+2, Seth Verrinder wrote:
>>
>> The single thread at a time rule is impl
The single thread at a time rule is implemented by the transducing
context (transduce, into, core.async, etc). Inside of a transducer's
implementation you just have to make the assumption that it's being
used properly. volatile! is what ensures that there's a memory
barrier.
On Tue, Apr 11, 2017 a
The problem is at a lower level. The memory model of the JVM doesn't
guarantee that changes to an unsynchronized non-volatile reference are
visible to other threads. Transducers don't have to worry about
concurrency but they do have to worry about visibility of changes
across different threads.
On
I'll defer to Timothy on the particulars of core.async but it looks like
[1] the transducer in channel is protected by a lock. If that's the case
volatile isn't adding anything in terms memory barriers.
1:
https://github.com/clojure/core.async/blob/master/src/main/clojure/clojure/core/async/imp
My guess is that partition-all and partition use non-volatile references
because none of the built-in stuff will return control back to the caller
at a finer resolution than output value (AFAIK). That's why take needs
volatile but partition-all doesn't (because for take the state persists
betwe
eap configured for Tomcat on each of a cluster of servers, each with
> 64GB RAM (our database servers are in a separate cluster and have 128GB RAM
> each, I believe).
>
>
>
> Sean Corfield -- (970) FOR-SEAN -- (904) 302-SEAN
> An Architect's View -- http://corfield.org/
Haha thanks for pointing that out - I mispoke - 1024 mb of ram - 1 gig of
ram. Using a $10 a month Vultr account. 1000 gigs would be a tad expensive!
On Monday, January 2, 2017 at 8:27:19 PM UTC-5, William la Forge wrote:
>
> Seth, something seems amiss. 1,000 GB is 1,000,000 MB. At 84
ere any technology I should look into, or practices I should
implement for this?
Being able to run many websites on one server is a critical issue for me...
Anyone have any advice? Thanks!
On Friday, December 23, 2016 at 11:56:19 AM UTC-5, Seth Archambault wrote:
>
> :-O
> Th
nt.md>. Luminus is a commonly
> used project template, but the deployment docs apply to most Clojure web
> projects and cover a range of setups.
>
> - James
>
>
> On 23 December 2016 at 14:11, Seth Archambault > wrote:
>
>> I'm posting this because right
Okay, armed with the new clarity, I felt embolden to tackle this once more.
Here's the next steps for those trying to tack CSRF protection onto a
Reagent project created with lein new reagent.
In handler.clj - you'll add the ring.middleware.anti-forgery and refer to
*anti-forgery-token*
(ns m
reference that meta tag
with javascript (that's how Laravel does it). ...but I'll cross that bridge
when I come to it.
Thanks!
Seth
On Friday, December 23, 2016 at 10:36:46 AM UTC-5, James Reeves wrote:
>
> The "use" function is a deprecated shortcut for "require&
the modern way to do CSRF
protection?
Secondly, I'm concerned I'm doing something wrong - ring.middleware feels
like a magical thing where you apply wrappers, and then stuff just
magically works. I'm not a big fan of magic, I want to be able to see a
pathway for finding a solu
d study the project.clj
and determine that /src/clj/myapp/server.clj is used by anything. It just
happens magicaly, the complexity is hidden...
Again, I'm really enjoying clojure so far, and I really agree with the
creators vision, but I'm concerned whenever really easy tasks take fore
Hi,
I posted another answer to this. There's an additional problem with the
macro that explains what you're seeing in your first example.
- Seth
On Monday, December 28, 2015 at 2:47:39 AM UTC-6, Mian Pao wrote:
>
>
> http://stackoverflow.com/questions/34448773/is-functi
Yeah, this is definitely an annoying bug.
On Thursday, April 10, 2014 8:03:02 PM UTC+8, Kevin Ilchmann Jørgensen
wrote:
>
> nREPL server started on port 53667 on host 127.0.0.1
> REPL-y 0.3.0
> Clojure 1.5.1
> Docs: (doc function-name-here)
> (find-doc "part-of-name-here")
> Sourc
Hi Mike! You might talk to Zack at CapClug. The session before the one you
attended he walked through two small Clojure projects, with and without
Prismatic schema.
On Saturday, May 17, 2014 2:22:51 PM UTC, Mike Fikes wrote:
>
> I've never used a dynamically-typed language and an issue I've enco
I would spend A LOT of time on working with the IDE be it
Eclipse/Counterclockwise, IntelliJ or whatever. In my limited experience
the main impediment to Clojure is not Clojure itself, which is very
sensible, but in dealing with file locations, dependency management,
projects, Leiningen, all o
Don't have an answer but I would sure enjoy hearing the group's wisdom on this.
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I'm extremely interested. I'm new to Clojure, coming mostly from a
Mathematica background, but I just finished a major project linking
Mathematica to Weka and am interested in doing something similar with
Clojure. Weka, by the way, is 99% terrific, and so before people go
completely reinvent
I'm new both to Clojure and to this group, so please be gentle. I come to
Clojure mostly from a Mathematica background, which has a certain Lispyness
to it. One of the things one can do in Mathematica is to map a function to
an s-expression but not at its top level, but rather at some user spe
I would suggest adding something on the lines of these - it is
confusing to newcomers, and it really isnt complete documentation to
not include. The crux of the matter is how clojure defines methods
when a record has inline protocols, etc. Maybe i missed this in the
documentations.
1. extend-prot
oooh ... I can definitely find a use for this in my project! Thanks
for pointing it out.
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Or you could just modify the source of promise ... i dont know why
promises dont support timeouts
(defprotocol PWait
(wait-for [this timeout units] [this timeout]))
;;copied from clojure source, but adding timeout wait-for
(defn promise
"Alpha - subject to change.
Returns a promise obje
Now reflecting on it, and without looking exactly at source code, i
think it is clear that functions are implemented as classes (which
extend RestFn, etc). and the body are methods of the classes - so,
one couldnt force function class names to be the same. And of course
they need to be random enou
> So, combine the ClassLoader hackery with slapping "implements
> Serializable" on clojure.lang.IFn?
Actually, I just looked at the implementation code -and this is not
true. Actually, a variadic function is of type RestFn and otherwise it
is of type AFunction. Restfn extends AFunction, and AFunct
whats wrong with clojure.contrib.generic.arithmetics? Too slow? The
only other method that i know of is too :
(a). use defprotocol, but this will only dispatch on the first value
(b). use gen-class, but this require aot compilation
For the first approach, see
https://github.com/ztellman/cantor/bl
back
;
;
(def f "/home/seth/Desktop/test")
(defn get-bytes
"convert object to byte array"
[obj]
(let [bytes-out (java.io.ByteArrayOutputStream.)
out-obj (java.io.ObjectOutputStream. bytes-out)]
(try
(do (.writeObject out-obj obj) (.toByteArray by
Maybe records shouldnt be redefined if their definition hasnt changed?
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Thanks! Works like a charm (except you cant turn it off - but thats
ok!)!
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Makes sense - I was hoping there was a way around this in which the
type hints would also work for the original class.
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Notice that this occurs even if i dont redefine record A - if i do
(require :reload-all 'my-namespace), any old record object will now
fail with type hinted functions.
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Ive recently started type hinting - however, when I have a record of,
lets say type A, and then i change the definition of record A, all
functions which have type hinted A now fail when i pass in the old A
records that i have already defined (cannot cast from type A to type
A is the error message
Has any gotten the warn-on-reflection to work in slime when compiling
a buffer? Warning occur when i paste a function into the repl, but no
reflections occur when i compile a buffer or when i load the file.
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I know that this has come up - but when will the restriction of "fns
taking primitives support only 4 or fewer args" be removed?
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Permissions seem a lot of hastle - also, im using a native library the
user has to install (zeromq), so that would be even more of a pain .
But thanks for the suggestion!
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Has anyone had any experience in the best way to deploy updates to end
users who have no programming experience? The application basically
consists of a src directory, and a bat file which runs 'lein run' to
start the program. It also consists of some extraneous files that have
to be installed on t
or i could have just used base64:) I love leiningen +maven+central
repository!
(import (java.io ByteArrayOutputStream ObjectOutputStream
ByteArrayInputStream ObjectInputStream)
org.apache.commons.codec.binary.Base64)
(defn bytes-to-obj
"convert string to object"
[s]
not fast, but it works:) any ideas on better code?
;code from
http://www.mail-archive.com/clojure@googlegroups.com/msg19378.html
;;saving objects to strings and going back -slow, but it works
(import (java.io ByteArrayOutputStream ObjectOutputStream
ByteArrayInputStream Objec
I know that IMeta is used with the (meta) function and with IObj, you
can also implement with-meta. And fn? tests for 'true functions' ,
i.e. only the function created by (fn). Not sure about the rest...
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any serializable java object should be supported. hmmm... i guess that
would work - simply output the object as a byte string and then decode
that.
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whats wrong with implementing Fn and IMeta?
On Feb 13, 9:35 pm, Ken Wesson wrote:
> As for being able to attach metadata, you just have to implement IObj
> on your functoids.
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and of course i forgot to include some utility functions. oh well...
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And just for the heck of it, if anyones interested - heres the hook
code.
(ns forex.util.emacs))
(defmacro is [val & message]
`(let [result# ~val]
(if (not result#)
(throw (Exception. ~(or (and (first message) `(format
~@message)) (format "assert: %s" (str val)
result#)))
oh, and of course the funuction needs to be executable (they are after
all just functions with metadata) - so we cant use ifn?, which would
return true on record!
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which namespace the function can
from (or id, if supplied), so that i can overwrite the hook when
adding a hook with similar ns/id.
On Feb 13, 9:08 pm, Ken Wesson wrote:
> On Sun, Feb 13, 2011 at 7:00 PM, Seth wrote:
> > Cool, thats what I thought. Sometimes, i wish i could inher
I have an application which contains a number of running threads, each
which has a state to it. A state is a single record. It contains some
random stuff, but most importantly it a has a :var slot which contains
a map in which the keys are vars and the values are whatever the vars
are (if they can
Cool, thats what I thought. Sometimes, i wish i could inherit from a
class, but then i just use proxy to do it instead :) For example, i
made a function which acted like a fn? , but had some metadata. At
first i was going to use records, but couldnt because i needed to
inherit from Afn, but proxies
As the question states - why doesnt defrecord support java class
inheritence? Is it just because people think it wouldnt be 'good' or
are there true technical issues with doing it?
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do you really need that? How about an infinite lazy sequence?
(defn infinite [arg]
(lazy-seq
(Thread/sleep 2000) ;;simulate 2 second retrieval time
(concat (for [i (range 0 arg)]
i) (infinite arg
(def a (infinite 3))
(first a) ;;=> sleep 2 seconds, return 0
(take 3 (filter
I also found it useful to define my own clojure.core. This is because
i wanted swap! and reset! to work on my AtomHash. So i did something
like this, using clj-nstools.
http://code.google.com/p/clj-nstools/
ns+ is sort of slow for large projects, but im sure that can be
improved.
(ns clj.core
(:
The problem is that defrecord explicitly defines the interface you are
trying to implement, so you are effectively attempting to declare the
interface twice. And since clojure.lang.seqable isnt a protocol, you
cant redefine it with extend. So, you will have to rewrite the
defrecord macro or similar
cool! thought you had to refer or something the namespace, but i guess
the reader works differently.
changes are here
https://github.com/Storkle/defrecord2
basically, i modified it to work with print-dup and i got rid of the
pprint methods and changed the way constructor names are specified. so
n
Ive just thought up that using print-dup for records might become a
nightmare. This is because it will now matter which ns you load it
from. If it loads an ns where the constructor function isnt defined or
isnt imported, it will throw an error. This will become a nightmare
when mixes records from v
Looks like it will do!
One change, though, that I made for myself is that
(defrecord2 (name constructor-name) [args] Protocol1 ...)
so you can do protocols
or (defrecord2 name [args] Protocol1...) for default
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d r)]
rec)))
However, it appears that the reader cant read classes
For example
(defrecord Foo [a])
(frm-save "/home/seth/Desktop/test" (Foo. 2))
(frm-load "/home/seth/Desktop/test")
Another problem is that it saves it as the ns it is in, for example my-
ns.Foo, and w
The core actually wouldn't have to be modified, as it already does
something similar. After all, the function 'use' already does it - if
we 'use' error-kit, it adds to the symbol map (seen by (ns-refers
*ns*)) a map from the symbol to the actual var in error-kit. Thus, in
ns A where we have used er
espace - a clear contradiction. Therefore, it is not possible to
use the function 'use'. One would have to create a different function
to get this to work - maybe put a 'export' metadata and have the new
use function search for that.
On Jan 17, 10:12 pm, Ken Wesson wrote:
> On M
if you 'use' ns A in ns B, ns C which uses B will not see the
functions of A. Im trying to create a ns which collects functions from
various other ns and exports them so that all you have to do is use
that one uber ns.
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woops, mistake
(defn ns-export [from-ns]
(count (doall (map (fn [[sym var]]
(let [v (if (.hasRoot var)
(var-get var))
var-obj (if v (intern *ns* sym v))]
(when var-obj
I have this function which takes all of the publics from one ns and
exports them in the current ns. My question is, is this the best way
to do it? Is there another method which doesnt use eval? I know eval
is supposed to be 'evil ' :)
(defn ns-export [from-ns]
(map (fn [[sym var]]
(let
Ah. But a new map is being created with the default :or operation. I
guess the ability to get this entire map with defaults is not
available directly from clojure destructuring binding.
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Now that i think of it, it is mostly a fear of having decreased
productivity in writing code that affected my statement that i liked
the little files. Im used to, i suppose, developing code for a
specific function in a file, being able to compile, goto line numbers
where there are errors,
send code
>Just discovered org-mode myself --- does anyone know of guide to using
>it with clojure for a total newbie?
I havent actually used it for clojure per se. I was just imagining how
it could be used. You have the ability to embed arbitrary code (from
many different languages). You can edit the code
The literate programming is actually a contrib to org-mode.
http://orgmode.org/worg/org-contrib/babel/
Ive actually used it to create my emacs.el, by having code in
emacs.org and have init.el tangle out the emacs code. Of course i
never documented
anything and did it for the novelty of being able
Is there any way to get the entire map when destructuring plus the
defaults?
(let [{:keys [a] :or {a 4} :as b} {:b 3}] b)
returns {:b 3}
but i would like it to return {:b 3 :a 4}
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have you guys checked out org-mode + babel for emacs? This would be an
excellent place to start to do literate programming. Interesting
ideas ... maybe i will try this in my own code ...
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> It's planned to be new reference type, which handles transients inside. So
> you send it functions living over transients for update. On deref the pod
> automatically converts things back into a persistent value. So updates will
> be fast, but things are transparently switched back to Clojure
I am interested in the references to pods that are floating around the
internet. However, when i downloaded the github master repository, i
couldn't find pod anywhere. Of course there are 17 other branches...
Clojures support for mutable multithreading is great if there are no
side effects, but som
ok, thats what i thought. Any change of a literal syntax for symbols
like in lisp, |symbol|??
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oh, and the public var is defined as private in the .class file, so i
can't use set!
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I am attempting to interop with scala. In scala, if you have a class
which is a var, a method is defined in the .class file called varname_
$eq which will set the var. Problem is, clojure apprent converts
dollar signs to the text _DOLLARSIGN_. Is there any way to prevent
this?
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unfortunately doesnt work. The library loads succesfully but i still
get the error when calling add. Note that compiling on the top is a
workaround to get it working on the repl.
i added the loadlibrary to an init function which is good and i
decided to ahead of time compile it - and it worked! I
All i need to do is a function to reload a class I specify, nothing
fancy. Surely there is some way?
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code in a
clojure file (test.clj)
(System/loadLibrary "Seth")
and go (compile 'test) on the REPL, i get
No such file or directory
[Thrown class java.io.IOException]
Restarts:
0: [QUIT] Quit to the SLIME top level
Backtrace:
0: java.io.UnixFileSystem.createFileExclu
Is it possible to reload modified classes? I would likely to quickly
test my java classes with clojure.
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I would like to start a discussion on the best syntax for clojure-clr
generics because in most large pieces of software on CLR you have to
specify types to create generic classes. Heres my proposal.
<> Reader macro expands to the macro g
example:
(AGenericClass. arg1
arg2)
expands to
(AGenericCl
What's this about an after party?
On Oct 18, 5:59 pm, Eric Lavigne wrote:
> > Hey Conj goers,
>
> > I'm scheduled to arrive around 6:30, and after I check in am planning
> > to spend the rest of the night writing code. Anyone want to help
> > commandeer a random lobby to join in on the fun?
>
> >
Yay! Following.
On Oct 2, 9:33 pm, jmis wrote:
> I'd like to announce my Visual Studio 2010 Clojure extension project,
> vsClojure. The extension is not yet complete but provides a base for
> further enhancements. Currently, it supports syntax highlighting,
> auto-indentation, brace mat
take that back, all i had to do was go to project.clj and remove the
offending entry!
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tried it out, looks good! except i accidently broke it by doing
cljr install /home/seth/.m2/helloworld 0.1, from then on it didn't
work so i had to reinstall it :(
(i though i could directly give address to repository)
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Woops, i left out a 0 on the version number, so i did ".1" instead of
"0.1"! Now it works!
Also, is there any way to use a library from the local maven
repository in a fresh clojure repl. By fresh, i mean i have set up
emacs to run a new clojure repl not related to previous projects. Is
there any
Im attempting a 'hello world' leiningen in which i install a simply
hello world library using lein install and then i create a new
project , hello2, which depends on that project. However, leiningen
does not seem to look in the local maven repository for the
dependencies so i get
1) helloworld:hel
Im attempting a 'hello world' leiningen in which i install a simply
hello world library using lein install and then i create a new
project , hello2, which depends on that project. However, leiningen
does not seem to look in the local maven repository for the
dependencies so i get
1) helloworld:hel
exact what i want!
Heres a nice link which describes it
http://pragprog.com/magazines/2009-07/when-things-go-wrong
On Sep 9, 6:20 am, Meikel Brandmeyer wrote:
> Hi,
>
> On 9 Sep., 05:31, Seth wrote:
>
> > Is there any code out there which reproduces common lisp's res
Is there any code out there which reproduces common lisp's restart
error handling capabilities?
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This sounds very similar to groovyc:
http://groovyland.wordpress.com/2009/03/03/groovyscalajava/
On Aug 28, 12:50 pm, Luke VanderHart
wrote:
> For the past week or two, I've been investigating what it would take
> to write something that would allow *.clj and *.java files to
> seamlessly compil
Going from Java to Clojure isn't quite as easy as going the other way,
as @brweber2 demonstrated at the local Clojure meetup. Here's the code
he used in the presentation, might send him a direct message on
Twitter for more info:
http://github.com/brweber2/javacallclj
On Aug 22, 7:48 pm, Robert M
rested in better CLR support
for Clojure. While it's not a strength of mine, I'm sure I will find
some way to contribute to that.
Sorry again for any off topic churning, and here's hoping the JVM will
continue to be a good place for Clojure to be for quite some time.
Seth
On Aug 13, 4
t anniversary of SCOracle day
(2010-08-12). This would have to be an organized effort since big
meaty chunks like CinC are probably within scope of only a few
Clojurians (i.e. not me).
Just my personal opinion -- questions, comments, and corrections are
welcome.
Seth
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It appears that lein-javac is not compatible with Leiningen 1.2.0-RC2:
% lein compile-java
[...]
Exception in thread "main" java.lang.Exception: Unable to resolve
symbol: make-path in this context (compile_java.clj:10)
On Jul 14, 9:19 am, Moritz Ulrich
wrote:
> There is lein-javac which integrat
It's not Clojure specific but I've seen a few mentions of it on
http://lispjobs.wordpress.com/
RSS feed: http://lispjobs.wordpress.com/feed/
On Apr 18, 12:59 pm, Nicolas Buduroi wrote:
> Hi, I've been having lots of fun in the past months working in Clojure
> only on my own time and wonder if th
Since you are really interested in both Clojure and statistics, might
I recommend two RSS feeds:
* The Incanter RSS feed -- you might already have this but just in
case. @liebke pays close attention to documentation in Incanter and as
well as comments to the blog.
http://incanter-blog.org/feed/
executable. It would avoid a lot of questions
about system configuration when reporting a bug.
So many people and projects have RE-implemented a "clj" script!
Seth
On Mar 25, 5:32 pm, "Heinz N. Gies" wrote:
> On Mar 25, 2010, at 19:55 , Chas Emerick wrote:
>
> &g
I hate to feed trolls, but this is a solid example of passive-
aggresive behavior. Also, ignoring plausible sounding, spell-checked
diatribes is bad.
The installation of one or two jar files from a Maven repository is
par for the JVM course. Deployment? Works on any reasonable JVM out
there. Could
M-x version
GNU Emacs 23.1.1 (i386-apple-darwin9.8.0, NS apple-appkit-949.54) of
2009-08-16 on black.local
Most of my configuration comes from the Emacs Stater Kit:
http://github.com/technomancy/emacs-starter-kit
On Mar 20, 3:46 pm, alux wrote:
> Sorry to have so many questions.
>
> I lookes at
Would :deprecated be a reasonable thing to include in a function's
metadata? Just the presence of it seems good enough, but I guess
pairing it with some programmer friendly message ("hey, use bar
instead of foo") might be nice.
Or... maybe 10,000 lines of XML as metadata! :-)
On Mar 18, 10:50 am,
This seems like a potential usecase for (memfn):
-
clojure.core/memfn
([name & args])
Macro
Expands into code that creates a fn that expects to be passed an
object and any args and calls the named instance method on the
object passing the args. Use when you want to tr
Laurent,
Merci beaucoup! I have linked to the video. I will be presenting
Clojure to the company I work for soon, and videos for Eclipse and
NetBeans really help me out. The fewer times I mention Emacs the
better, apparently :-|
Seth
On Feb 5, 12:10 am, Laurent PETIT wrote:
> 2010/2/5 S
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