The reader basically transforms :: into :namespace/, which means that
the remaining part must be an unqualified symbol (i.e. no / in it).
The character / is not allowed in unqualified symbols. As the
documentation [1] says : '/' has special meaning, it can be used once
in the middle of a symbol to
Perhaps this general anti-Windows attitude is what Windows-based newcomers
to Clojure find off-putting...
On Saturday, March 9, 2013 3:55:59 AM UTC, James Ashley wrote:
Since I've seen a few recent posts about this experience, I figured I'd
share mine:
0a) Install cygwin. I don't
My experience:
1. Download lein.bat
2. Run it
Jonathan
On Sat, Mar 9, 2013 at 10:23 AM, BJG145 benmagicf...@gmail.com wrote:
Perhaps this general anti-Windows attitude is what Windows-based newcomers
to Clojure find off-putting...
On Saturday, March 9, 2013 3:55:59 AM UTC, James Ashley
Gary, ::foo/bar is valid syntax if foo is a valid namespace alias.
Try:
(alias 'foo 'clojure.core)
::foo/bar
Il giorno 09/mar/2013 09.36, Gary Verhaegen gary.verhae...@gmail.com ha
scritto:
The reader basically transforms :: into :namespace/, which means that
the remaining part must be an
As long as you have wget, that works fine. Only problem I've found so far
is that lein new app followed by lein check throws an error, but it
looks like people are on the case.
https://github.com/technomancy/leiningen/issues/863
On Saturday, March 9, 2013 11:24:04 AM UTC, Jonathan Fischer
So I understand that Clojure's data structures are immutable but I am not
clear how that works with MVC.
So I have a view that displays a model. Other processes change that model
and the View presents those changes.
However it's not clear to me how that would work with an immutable model.
You need to store your model in a ref-type (atom,agent,or ref), and
attach a watcher on it (a fn which is responsible for updating the
view). Now, 'mutating' your model will trigger a View update...piece of
cake :)
example:
(def board-history
Log of the state of a game.
(atom []))
(defn
also see this for a discussion about why the need for design patterns
almost disappears in Clojure:
http://stackoverflow.com/questions/8902113/clojure-model-view-controller-mvc-design
Jim
On 09/03/13 14:24, Jim - FooBar(); wrote:
You need to store your model in a ref-type (atom,agent,or ref),
On 9 March 2013 12:27, Bronsa brobro...@gmail.com wrote:
Gary, ::foo/bar is valid syntax if foo is a valid namespace alias.
Try:
(alias 'foo 'clojure.core)
::foo/bar
I did not know that. Is that documented anywhere ? I was under the
impression that :: was just intended as a shorthand to
Does anyone see value in a wizard for lein? Does anyone know how to write a
wizard, preferably with a scripting language, or xml, rather than c++? And
can you alter system variables from within the wizard?
On Saturday, March 9, 2013 8:18:44 AM UTC-5, BJG145 wrote:
As long as you have wget,
I understand that ::foo is a keyword bound into the local namespace.
I also understand (according to the docs) that
:my.namespace/foo is the keyword foo in the namespace my.namespace.
::nsalias/foo is the keyword foo in the namespace my.namespace if I've
aliased my.namespace to nsalias.
But
...I dunno. As a Windows-addict-newbie, James has a valid point when he
says that Windows users expect to be able to just click next a lot, and I
don't think that will get you very far with Clojure. The tools like
Leiningen are pretty darn good, and not that difficult really. Simple,
clear
(...I have to say that, from reading the above, Cygwin sounds like a
nighmare and I certainly won't be troubling it...! If you want Linux on a
Windows machine, Virtualbox sounds like a safer bet...)
On Saturday, March 9, 2013 8:31:56 PM UTC, BJG145 wrote:
...I dunno. As a
(defprototocol P ...) does two things: define a map on the current
namespace, and generate an interface on a package that will have the same
name as the current namespace.
(defprotocol P (x [_])) ;; - P
(class P) ;; - clojure.lang.PersistentArrayMap
(:on-interface P) ;; - user.P
(.isInterface
On the Clojure side the only thing you can do is to serialize writes to the
resouce (the db connection). So at most one thread can be performing an
update operation, at a given time. You can increase concurrency by
mantaining read-only db connections (most likely in an
ad-hoc/by-convention
Two queues cover the 80% case: an implementation of BlockingQueue (array,
linked list backed), and clojure.lang.PersistentQueue.
The former provides concurrency semantics: there are no 'stale values'
issues associated to mutation, and you can choose whether your reads/writes
are blocking
Hi all,
I wrote some code to generate some example data for a web ui that I'm
working on and I was wondering if I could get some advice about it to
ensure I'm on the right track in my clojure learning. Basically its a very
simple program that generates a number of JSON files that contain
[reviving a slightly old thread]
Note that as of clojure 1.4 you can also do:
(:require foo.bar :refer :all)
in fact from comments I've seen elsewhere there is a general intention to
remove :use entirely?
It'd be good to have some clarity on this. The vast majority of code
samples use :use,
Speaking strictly for myself, but as someone who spends about half his
professional day writing Clojure: :use is dead, long live :require.
I've found using :require [foo :refer :all] rather than :use foo
has lead to cleaner, more consistent ns statements in my own code, and
I've made it a policy
I recently asked about mutual referenced support in the prismatic library
plumbing
https://github.com/Prismatic/plumbing
and currently its an open question about how to implement that.
So I made a proof-of-concept version of a graph-like library that
supports mutual recursion.
On my system I have:
*clojure-version*
{:major 1, :minor 4, :incremental 0, :qualifier nil}
(java.util.Locale/getDefault)
#Locale en_US
(format %.1f 0.5)
0,5
(java.lang.String/format (java.util.Locale/getDefault) %.1f (to-array
[0.5]))
0.5
but
(java.lang.String/format %.1f (to-array
What OS and version of Java are you using (output of java -version, and if on
Linux lsb_release -a and uname -a).
Are you doing these commands one after another in a single REPL session? If
so, how did you start that REPL?
I've tried the commands you mention on these OS and JDK combos with
I am trying to run clojure on windows 7 with this java version:
java version 1.7.0_05
Java(TM) SE Runtime Environment (build 1.7.0_05-b05)
Java HotSpot(TM) 64-Bit Server VM (build 23.1-b03, mixed mode)
The decimal separator used to be a dot but for some reason it changed to a
comma recently. I
I installed the latest 1.7.0_17 and apparently the issue is gone but I
still don't know what caused it.
Thanks.
On Sunday, March 10, 2013 3:22:21 AM UTC, dabd wrote:
I am trying to run clojure on windows 7 with this java version:
java version 1.7.0_05
Java(TM) SE Runtime Environment (build
Yes, the javadoc is quite good, paste a link here:
http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/BlockingQueue.html
On Friday, March 8, 2013 4:32:38 AM UTC+8, larry google groups wrote:
At some point on this mailist, someone suggested that to best understand
concurrency in
James Ashley writes:
2) Download the lein install script as text from the leiningen home page.
3) Copy it over to my cygwin directory
4) Search/replace to replace the HTML entities with the real thing. I think
this was a matter of amp; and gt;
Can you explain how you downloaded bin/lein
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