One of the neat things about Clojure (maybe all functional languages) is
that functions can be defined either extensionally or intensionally. How
can one create a Clojure structure that mixes these two types of
definition?
That is, I would like to define a function f that saves its result the
Mon, Jan 21, 2013 at 7:27 AM, Larry Travis
> wrote:
One of the neat things about Clojure (maybe all functional
languages) is that functions can be defined either
extensionally or intensionally. How can one create a
Clojure structure tha
In Clojure, if I have a function call that asks for return of a
function, for example
user> ((fn [a] (fn [b] (+ (inc a) (* b b 5)
I get the function name
#
But what I would like to get is an expression that defines this
function, for example
(fn [b] (+ 6 (* b b)))
Is there some way th
until values for their open variables become available.
--Larry
On 2/23/13 5:50 PM, Michael Klishin wrote:
2013/2/24 Larry Travis mailto:tra...@cs.wisc.edu>>
Is there some way that I can suppress the evaluation of this
expression?
((fn [a]
'(fn [b] (+ (inc a) (* b
lime/, I also get an
error message but a different one, viz. "Searching for program: No such
file or directory, lisp".
I hope somebody has an answer for me w.r.t. Aquamacs, but I will be
happy if I can get either version of Emacs to work with clojure and slime.
Thanks.
--Larry T
figure it
out with some exploration.
--Larry Travis
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s -- adapting them to Aquamacs if I can.
--Larry Travis
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Thanks again. I have to be away from home and my iMac for the next ten
days so it will be some time before I can work through your suggestions,
but I will certainly give them a try. I'll let you know what kind of
success I have. I very much appreciate your help.
--Larry Travis
Joost
Kasim:
I just discovered ClojureW, and it looks promising. I will report my
reaction after I get time to thoroughly test it for the kinds of things
I am doing.
In the meantime, a request:
When you work 'on a "Just Works" emacs setup' for Mac Os X consider
whether you can create such a setup
I need to upgrade from the older version of Clojure I have been using so
I downloaded Version 1.2.1 and followed these instructions from
http://clojure.org/getting_started:
In the directory in which you expanded clojure.zip, run:
java -cp clojure.jar clojure.main
This will bring up a simple r
Jonathan:
Thanks. When the instructions said "the directory in which you expanded
clojure.zip" I took that to mean the directory I was in when I expanded
clojure.zip, not the directory that was created to hold the zip-file
contents.
--Larry
On 7/14/11 10:05 PM, Jonathan Cardoso wrote:
Wei
Thanks, Sergey. The problem was indeed a classpath problem. The part of
my ignorance about Java that seems to cause me the most trouble is my
ignorance about Java classpaths. I think some Clojurians underestimate
the difficulties involved in learning Clojure without knowing Java
first. I wish
uter
science -- at least, for the very important areas of programming
multi-processor systems and of experimental programming (so important,
for example, for artificial intelligence research).
--Larry
On 7/16/11 10:10 AM, Phil Hagelberg wrote:
On Fri, Jul 15, 2011 at 11:29 PM, Larry Travi
I too think this is interesting because because it serves to illustrate
some important general aspects of Clojure with a very simple problem.
I wrote four Clojure programs contrasting different ways of solving the
problem, and then timed the application of each ten times to a
million-item sequ
I have installed Leiningen not so much to manage projects but to enable
use of /clojure-jack-in/ as a means of getting Swank and Slime to work.
And they do work for me. But now I have a question that I can't find an
answer for in any Leiningen documentation I know about. I have a
largish, pr
n Corfield wrote:
On Sat, Apr 28, 2012 at 12:21 AM, Larry Travis wrote:
I have installed Leiningen not so much to manage projects but to enable use
of clojure-jack-in as a means of getting Swank and Slime to work. And they
do work for me. But now I have a question that I can't f
programs to work than on
getting my programming environment to work.
If you get any more ideas about how I might try to solve my problem, let
me know. Thanks.
--Larry
On 4/28/12 5:07 PM, Sean Corfield wrote:
On Sat, Apr 28, 2012 at 2:41 PM, Larry Travis wrote:
That is, what would cor
/twitter.com/#%21/sw1nn>, w: sw1nn.com
<http://sw1nn.com/> }
On Sun, Apr 29, 2012 at 12:42 AM, Larry Travis <mailto:tra...@cs.wisc.edu>> wrote:
Sean:
Your suggestion doesn't work. The Slime REPL comes up fine when I
use the dependency vector you suggest (some
Phil, Neale, Sean:
You guys are all way ahead of me as to why I am getting the results I am
getting, but it is only Neale's advice that works. That is
[prjctOne/prjctOne "1.0.0-SNAPSHOT"] works, but
[prjctOne "1.0.0-SNAPSHOT"] does not.
--Larry
On 4/30/12 11:14 AM, Phil Hagelberg wro
robably already
knew that they would!)
--Larry
On 5/1/12 11:22 AM, Phil Hagelberg wrote:
On Mon, Apr 30, 2012 at 9:28 PM, Larry Travis wrote:
Phil, Neale, Sean:
You guys are all way ahead of me as to why I am getting the results I am
getting, but it is only Neale's advice that works.
A command like
user> (doc hash-map)
in the slime-repl created by clojure-jack-in
results in
Unable to resolve symbol: doc in this context
[Thrown class java.lang.RuntimeException]
Can this be fixed or do I have to do my doc requests someplace else?
--Larry
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Thank you, Roberto. Works like a charm.
--Larry
On 5/4/12 2:32 PM, Roberto Mannai wrote:
You should "use" it:
user> (use 'clojure.repl)
nil
user> (doc doc)
...
On Fri, May 4, 2012 at 9:27 PM, Larry Travis <mailto:tra...@cs.wisc.edu>> wrote:
A command
Roberto:
This indeed looks like it will be useful. Thanks.
Your require-all-snippet.clj script loaded OK except for:
Attempting to require clojure.parallel : couldn't require
clojure.parallel
Exception
#java.lang.ClassNotFoundException: jsr166y.forkjoin.ParallelArray>
--Larry
On 5/4/1
Phil:
Thanks. I obviously need to start doing my Clojure programming with a
Slime cheatsheet in front of me!
--Larry
On 5/4/12 4:00 PM, Phil Hagelberg wrote:
Another way to do it is just use C-c C-d C-d for docs lookup.
-Phil
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Lee's comments ring true for me so let me extend them.
Before I discovered Clojure, my experience as a programmer had been
mainly in the area of artificial-intelligence experimental programming.
I was once a reasonably proficient Lisp programmer, but pre-CL and
pre-CLOS, that is, mainly using
Sean and Lee:
In general, I have considered the difference between Aquamacs and GNU
Emacs to be that the former prioritizes computer-user interaction via
mouse, command-bars and menus (which requires a lot of hand movement
between keyboard and mouse, but enables the user to dispense with
memor
How do I set jvm options for a /lein repl/ initiated independently of a
project? In particular, I want the heap expansion that results from
doing "M-x clojure-jack-in" in an emacs /project.clj/ buffer with
":jvm-opts [ "-Xms4G" "-Xmx4G"]" in its defproject form.
--Larry
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I should be switching over to Leiningen 2 shortly in any case, but I am
curious. How does one "set JVM_OPTS as an environment variable"?
--Larry
On 5/21/12 11:42 AM, Phil Hagelberg wrote:
On Mon, May 21, 2012 at 5:28 AM, Raju Bitter wrote:
How do I set jvm options for a lein repl initiated
It took me a while to figure out how to put multiple entries into an
environment variable (that is, settings for both min and max heap sizes,
to wit, "export JVM_OPTS=\ -Xms4G\ -Xmx4G") but, once I did, Phil's and
Luc's suggestions have worked well and things have gone swimmingly. They
work for
Something like this will give you what you want:
(defn subseqx
[s start end]
(cond
(instance? clojure.lang.IPersistentVector s)
(subvec s start end)
(instance? java.lang.String s)
(subs s start end)
:else
(let [slice (dr
(1) Is there any way I can extract from a Clojure lazy sequence at some
given point in its use those of its members that have so far been
realized? For example, can I extract the cache of realized members, turn
it into a vector, and then process that vector independently of further
use of the l
What is the rationale for this?
user> (= [1 2 3 4] '(1 2 3 4))
true
I was quite surprised when this turned out to be the cause of a bug in a
function I am constructing. Vectors and lists differ so substantially in
their implementation and in their behavior that a vector and a list
should no
As participants in this googlegroup have often observed, an excellent
way to learn Clojure is to study the source definitions of its API
functions. This advice works better for learners who know Java, which
I don't. I sometimes think that, if I were to teach a "Clojure
Programming" course, I
Mark, Andy, Tassilo:
Very helpful, gentlemen. You are kind and skillful tutors. Thank you much.
--Larry
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Pursuing the thinking behind my original comment, I challenged myself to
see how many ways I could write a function equivalent to list* without
using _spread_ (assuming I had the full Clojure API available to me --
which, of course, the author of list* did not have). Here are four ways:
*(def
It almost certainly has something to do with my abysmal ignorance about
things Java, but I don't understand this difference:
(1)
user> (map Math/sqrt [5 6 16])
Unable to find static field: sqrt in class java.lang.Math
[Thrown class java.lang.RuntimeException]
(2)
user> (map #(Math/sqrt
Thank you, gentlemen. Jim and Luc, your answers are both helpful. Luc's
answer illustrates why a Java tyro often has problems understanding
Clojure. Somebody like me who is trying to master Clojure, having come
to it via a language path that doesn't include Java, needs a
prerequisite crash cour
I have been solving Clojure problems now for many months and can no
longer exactly be considered a Clojure NOOB, but I still have an awful
lot to learn about Clojure. One thing that has caused difficulties from
the beginning is that I don't know Java and don't know how to exploit
the Java eco-
:5045)
the REPL line which resulted in the error message was 15392, not 5045.
So where does the 5045 come from?
--Larry
On 1/3/12 12:59 PM, Meikel Brandmeyer wrote:
Hi,
Am 03.01.2012 um 18:24 schrieb David Nolen:
On Tue, Jan 3, 2012 at 12:09 PM, Larry Travis wrote:
But my error messages are
ut I don't think I
would know what to do with it if I could! I am a Java tyro (who knows
some other lisps reasonably well) trying to use clojure under Mac Os X
and Emacs, but I am having a lot of problems getting clojure to run
conveniently in that environment.
Thanks for your help.
-
tps to be
supported and then things worked fine.
I could dig up my notes from when I did it if you need more
information.
Cheers,
John
On Jan 21, 4:49 pm, Larry Travis wrote:
I get the following when I try to install Leiningen:
---
larrytravis$ lein-install.sh self-install
Downloading
You guys are great! As my dad used to say when he had been greatly
helped: Each of you is a scholar and a gentleman.
I admire your expertise. You each had knowledgeable and quite helpful
suggestions. I ended up using Alex's ideas for getting the Leiningen
installation process to avoid Macport
":867" to the file's name
and then tell me that the changed name is an unresolvable symbol?
Thanks for any advice any of you might have. I hope the question isn't
impossibly dumb.
--Larry Travis
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, Ken Wesson wrote:
On Sat, Mar 12, 2011 at 7:49 PM, Larry Travis wrote:
I'm having trouble getting the load-file command to work in a Clojure repl.
On some files it works and on some it doesn't. Here is an example of its not
working:
I do:
(load-file "/Users/larrytravis/AquaFile
start can quickly be caught and
corrected, but I suspect that in this case I made such a false start and
didn't fully correct for it.
--Larry
On 3/12/11 9:09 PM, Ken Wesson wrote:
On Sat, Mar 12, 2011 at 9:46 PM, Larry Travis wrote:
Ken:
The cause of my difficulty indeed was a corr
On Sun, Mar 13, 2011 at 1:51 PM, Larry Travis wrote:
Ken:
Your question is an interesting one. My answer may serve as a word to the
wise: I do my Clojure source-code editing in Emacs (actually Aquamacs, but
the difference is not important for what I am saying here). As any Emacs
user knows, when
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