For the most part, you can program complex programs in Clojure without ever
dropping down to Java.
There are only a handful of Java libraries that are important to know well,
primarily because Clojure chose not to implement certain functionality that
is readily available on the host system.
Hi, Bruce.
I know almost no Java, and yet I have been a fairly productive professional
Clojure programmer for several years. How is that possible? Here are my
thoughts:
1. A lot of code is application logic. This will be 100% Clojure.
2. The next big chunk of code is talking to databases,
At last a question I can contribute to.
There's certainly no need to be a Java "guru" to become "good" at Clojure,
although it depends on what you definition of "being good at something" is.
I'm far from being a Java guru, really, I've learned it only 8 years ago
(at school) and only practiced
Hello,
There is much I like about Clojure - from it being a Lisp
dialect to functional programming. I know it runs on the JVM. My question
is
this: If one is not a guru with Java will that be a problem becoming good
at Clojure? The only thing that intimidates me about Java
is the
Hi. I am new to clojure, and I find leiningen REPL is a convenient tool for
clojure code testing. However, I find I cannot include external java
libraries and call functions defined in those libraries from lein REPL.
For example, my clojure code needs to compute square root, which is defined
Assuming the Java or Clojure library is on your classpath, it *should* be
usable from the REPL.
(import '[java.library SomeClass])
(.foo (SomeClass. 42))
(require '[clojure.contrib.math :as m])
(m/sqrt 42.0)
or whatever
On Thu, Nov 7, 2013 at 8:00 AM, Starry SHI starr...@gmail.com wrote:
I started with a db example and dropped this into the core.clj of an 'app'
project, just before the defn for -main.
(sql/with-connection db
(sql/with-query-results rs [select * from foo limit 3]
(dorun (map #(println %) rs
On lein run this prints three rows, but prints them twice. If
try out clooj ide ... if never used emacs ,
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On Tue, Aug 30, 2011 at 1:32 PM, labwor...@gmail.com wrote:
(1) I have followed the Getting started steps and installed clojure-mode
in Emacs. However, when I edit a .clj file, I am in clojure-mode (C-h m) but
no clojure on the menubar. There should be one, right? What am i missing.
There's
(1) I have followed the Getting started steps and installed clojure-mode
in Emacs. However, when I edit a .clj file, I am in clojure-mode (Ch m) but
no clojure on the menubar. There should be one, right? What am i missing.
(2) I just use Mx inferior-lisp. But how do you get out of clojure? I
There are some old Getting Started steps out there, but you'll
probably get a better start if you Google for leiningen and
swank-clojure for a more up-to-date technique.
If you need to tell the Clojure process to quit, the syntax is (System/exit 0).
Mark
On Tue, Aug 30, 2011 at 4:32 PM,
Thanks for both answers. Two ways of doing it. Great!
The :jvm-opts -Xmx1g -option in the project-file doesnt seem to work
with the swank-server.
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On Jul 2, 6:35 pm, Nicolas Oury nicolas.o...@gmail.com wrote:
I am looking for a way to tell leiningen what JVM options to use with the
SWANK server. (I need a lot of Heap size to do anything useful...)
I wasn't able to find that in the doc. Is it not the right way of
proceeding?
I'd
Thanks for both answers. Two ways of doing it. Great!
On Sat, Jul 3, 2010 at 9:56 AM, Saul Hazledine shaz...@gmail.com wrote:
On Jul 2, 6:35 pm, Nicolas Oury nicolas.o...@gmail.com wrote:
I am looking for a way to tell leiningen what JVM options to use with the
SWANK server. (I need a lot
Dear all,
I am moving from netbeans to leiningen + swank + emacs.
Enclojure was great but I wanted to try somnething else. Leiningen is
amazing. Thanks to the author(s).
I am looking for a way to tell leiningen what JVM options to use with the
SWANK server. (I need a lot of Heap size to do
If you launch swank with 'lein swank', there is probably an option.
lein is just a shell-script which calls the following at the end:
exec $RLWRAP $JAVA_CMD -Xbootclasspath/a:$CLOJURE_JAR -client $JAVA_OPTS \
-cp $CLASSPATH -Dleiningen.version=$VERSION $JLINE \
Hello everyone,
I think i've not figured out yet how compile and/or namespace works.
I'm trying to execute the example posted in http://clojure.org/compilation
I've created a file named hello.clj and put the clojure.jar in the same
directory (c:\clojure_tests).
Then, i started the REPL using
Hello
If you declared clojure.examples.hello namespace, then you need to have
file hello.clj in clojure/examples/ directory. and you need to have
c:\clojure_tests in classpath, something like:
java -cp clojure.jar:c:\clojure_tests clojure.main
Paulo Sérgio Medeiros at Mon, 15 Feb 2010 03:13:51
Hi,
On Feb 15, 6:13 am, Paulo Sérgio Medeiros pase...@gmail.com wrote:
I think i've not figured out yet how compile and/or namespace works.
I'm trying to execute the example posted inhttp://clojure.org/compilation
I've created a file named hello.clj and put the clojure.jar in the same
Hi! Thanks, i think i haven't executed java from command line for a while
and forgot some things. ;-)
On Mon, Feb 15, 2010 at 11:32 AM, Meikel Brandmeyer m...@kotka.de wrote:
Hi,
On Feb 15, 6:13 am, Paulo Sérgio Medeiros pase...@gmail.com wrote:
I think i've not figured out yet how compile
(...)
This is perfectly possible, although not necessarily desirable.
(ns com.example.MyClass
(:gen-class
:state state
:init init
:methods [[getMyIntField [] Integer]
[setMyIntField [Integer] Void/TYPE]]))
(defn -init
[x]
[[] (ref x)])
(defn
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