Re: noob question about error with tail recursion

coco writes: > thanks for the answer, well, I rewrote the function lik this: > > (defn recursive-reverse [coll] > (loop [col coll mem '()] > (if (empty? col) > mem > (recur (rest col) (cons (first col) mem)) ))) > > I've a little logic problem but I fix it One minor remark:

Re: noob question about error with tail recursion

On Tue, Nov 22, 2011 at 9:22 PM, coco wrote: > thanks for the answer, well, I rewrote the function lik this: > > (defn recursive-reverse [coll] >  (loop [col coll mem '()] >    (if (empty? col) >      mem >      (recur (rest col) (cons (first col) mem)) ))) > > I've a little logic problem but I fi

Re: noob question about error with tail recursion

thanks for the answer, well, I rewrote the function lik this: (defn recursive-reverse [coll] (loop [col coll mem '()] (if (empty? col) mem (recur (rest col) (cons (first col) mem)) ))) I've a little logic problem but I fix it thanks On Nov 23, 12:54 am, Sean Corfield wrot

Re: noob question about error with tail recursion

On Tue, Nov 22, 2011 at 8:49 PM, coco wrote: >      ((cons (last col) mem) >       (recur (butlast col) mem) ... >      ((cons (last col) mem) >       (recur col mem) In both of these, you have a function call with (cons (last col) mem) as the function... You're going to need (recur so

noob question about error with tail recursion

Hi..I've a little problem using recur for recursive calling...I'm trying do the clojure koans and the recursive reverse function [1 2 3 4] -> '(4 3 2 1) first I try this code: (defn recursive-reverse [coll] (loop [col coll mem '()] (if (empty? coll) mem ((cons (last col) mem)

Re: use namespace locally in a function

Yes, I meant local context. In principle, this could help to avoid namespacing conflicts in certain cases. But not a big deal, just wondering if the language supports that. Apparently not. Cool with me. Thanks everybody! On Nov 22, 6:59 pm, Alex Baranosky wrote: > Looks like he'd like to make a n

Re: Literate Programming in Emacs?

I have a bit of a weird setup I think. I put clojure-1.3.0.jar in ~/.clojure and set a variable for org-mode according to the advanced setup instructions. I also run org-mode from source. As a result I make sure to add org-mode's lisp/ dir to my load path. Sent via mobile On Nov 22, 2011, at 4

Re: use namespace locally in a function

Looks like he'd like to make a namespace available *only* in a local context, which some languages support, like Scala, for one. I never have a need for that, really. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email t

Re: use namespace locally in a function

something distasteful I imagine On Tue, Nov 22, 2011 at 3:20 PM, Sean Corfield wrote: > On Tue, Nov 22, 2011 at 3:18 PM, Kevin Downey wrote: >> require/use/import etc make global changes to a namespace(compilation >> environment), best not to hide that inside a function. > > True. Which is why I

Re: use namespace locally in a function

On Tue, Nov 22, 2011 at 3:18 PM, Kevin Downey wrote: > require/use/import etc make global changes to a namespace(compilation > environment), best not to hide that inside a function. True. Which is why I went back and re-read the OP's question and realized I'd missed "as metadata" anyway and now I

Re: use namespace locally in a function

On Tue, Nov 22, 2011 at 3:14 PM, Sean Corfield wrote: > On Tue, Nov 22, 2011 at 3:13 PM, Sean Corfield wrote: >> On Tue, Nov 22, 2011 at 2:52 PM, Igor TN wrote: >>> Is it possible to "require" or "use" a namespace as metadata inside >>> the function definition? Something like >> >> Your looking

Re: use namespace locally in a function

On Tue, Nov 22, 2011 at 3:13 PM, Sean Corfield wrote: > On Tue, Nov 22, 2011 at 2:52 PM, Igor TN wrote: >> Is it possible to "require" or "use" a namespace as metadata inside >> the function definition? Something like > > Your looking for the (require ..), (use ..) and (refer ..) functions - > se

Re: use namespace locally in a function

On Tue, Nov 22, 2011 at 2:52 PM, Igor TN wrote: > Is it possible to "require" or "use" a namespace as metadata inside > the function definition? Something like Your looking for the (require ..), (use ..) and (refer ..) functions - see http://clojuredocs.org for details and examples. -- Sean A Co

Re: Can't build clojure cloned from github - 2 tests failed - when running from cygwin

Well, it is easy to break tests on any system. All you need to do is to put space into file name path. For example in clojure / test/ clojure /

Re: Use of eval

If you try to do it without eval and you don't have the apache stuff on your classpath, then you get an exception while compiling, before class/forname is ever called. On Nov 22, 11:33 am, vitalyper wrote: > Gary, > > You were right with your initial reply. Sorry I did not get it. Thanks > for yo

use namespace locally in a function

Is it possible to "require" or "use" a namespace as metadata inside the function definition? Something like (defn f {:use '[clojure.set]} [] ... ) If yes, can anybody point me where can I find an exact syntax? If no, why not? Thank you, Igor -- You received this message because you are sub

Re: >>> http://immutant.org/

Thanks for the info, Jim. We are looking forward to testing TorqueBox 2.0 soon -Owen On Tue, Nov 22, 2011 at 4:11 PM, Jim Crossley wrote: > Hi Owen, > > I'm one of the devs of TorqueBox and Immutant. We're trying to get the > first 2.0 release of TorqueBox out this month, so that's taking

Re: Literate Programming in Emacs?

It should work as expected if you follow http://orgmode.org/worg/org-contrib/babel/languages/ob-doc-clojure.html and use the stand-alone version of swank-clojure (Section Connecting with SLIME https://github.com/technomancy/swank-clojure). Looking at ob-clojure.el http://kanis.fr/hg/lisp/org/ob-clo

Re: Literate Programming in Emacs?

I should add that I am starting with a working setup (able to M-x clojure-jack-in and compile and execute stuff in the REPL as expected). -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com No

Literate Programming in Emacs?

For those who do Literate Programming in Emacs, what do you use? I was looking at org-babel-clojurewhich says: > You will need to install the following packages: clojure-mode, > swank-clojure, slime, slime-repl But wh

Re: >>> http://immutant.org/

Hi Owen, I'm one of the devs of TorqueBox and Immutant. We're trying to get the first 2.0 release of TorqueBox out this month, so that's taking up a good chunk of focus, but we're actively hacking on Immutant as well. At this point, we have web (ring), messaging, and daemons mostly working, but w

Re: Google Maps in Clojurescript

Hi, Just to add another way of doing the same thing, I used the following when I was using Google Maps in Clojurescript: (def map-opts (extend-object! (js-obj) {"zoom" 4 "center" center-of-us "mapTypeId" types/ROADMAP

>>> http://immutant.org/

We have been exploring TorqueBox with great interest for our JRuby apps. So, It makes sense that the Immutant AS (Based on JBoss 7) has appeared for Clojure Anyone in this group testing it? Cheers, Owen -- You received this message because you are subscribed to the Google Groups "Clojure

Re: Proper parallelism?

Clojure futures use the send-off thread-pool (unbounded), which is defined like this: from Agent.java: final public static ExecutorService soloExecutor = Executors.newCachedThreadPool(createThreadFactory("clojure-agent-send-off-pool-%d", sendOffThreadPoolCounter)); So, it's using executors.

Re: clojure libs and logging

Oups, I'll look at it... we may have well upgraded Lein without reviewing project.clj options. We're about to deliver another version of our software so it's just about time to do that. On Tue, 22 Nov 2011 10:57:47 -0800 Phil Hagelberg wrote: > On Mon, Nov 21, 2011 at 9:10 PM, Keith Irwin > w

Re: Use of eval

Gary, You were right with your initial reply. Sorry I did not get it. Thanks for your help in understanding this. On Nov 22, 1:58 pm, Gary Trakhman wrote: > Also I think this line doesn't actually do anything:  (Class/forName > "foo.bar") > > It will effectively just ask the classloader to load

Re: Proper parallelism?

Andy, You can also look into using futures (pmap uses future). In section 11.6.1 of "Joy of Clojure" there is a recipe how to dispatch multiple RPC calls in parallel using as-futures macro. Obviously, this depends on what you want to do with results of your REST calls. On Nov 22, 11:16 am, AndyK

Re: Google Maps in Clojurescript

Roman, I apologize, I never thanked you for this. I finally got around to trying this out last night and put together this small project for anyone else interested: https://github.com/sritchie/contour I'm using Noir server-side. This is just a demo now, but we'll see what comes of it. Here's what

Re: Use of eval

Also I think this line doesn't actually do anything: (Class/forName "foo.bar") It will effectively just ask the classloader to load the class. You removed more than the eval in your referenced code, you removed the code that did anything. That code needs to be there. It's eval'd because it

Re: clojure libs and logging

On Mon, Nov 21, 2011 at 9:10 PM, Keith Irwin wrote: > What's the standard way for including logging in a library? I've included > clojure.tools.logging as a dependency, but the resulting jar (lein install), > contains clojure.tools.logging classes. Is that okay, given any project its > likely to b

Re: clojure libs and logging

I'm guessing that removing the non-project classes and then just declaring a dependency should work well enough. Couldn't find :disable-implicit-clean in the sample project file technomancy maintains on his github repo, but did use :clean-non-project-classes, which removed the compiled logging

Re: Proposal: libraries should have type hints

I think there is another reasonable case for a type hint. If you've written a function that is not generic, where one type and only one type will do, then why not add a type hint as a form of documentation if nothing else? On Nov 21, 1:58 pm, Nicolas wrote: > Hi ! > > An interresting point of clo

Re: Use of eval

I think you're confusing compile-time with run-time. A try-catch wouldn't affect the compiler. Perhaps you actually have commons-logging in your classpath? It's pulled in by many libraries. Or you forgot to remove the quote in addition to removing the eval in your testing. Here's the code that f

Re: Use of eval

Gary, You are probably removing try/catch as well. ClassNonFoundException is expected and silenced with catch. (defn cl-factory "Returns a Commons Logging-based implementation of the LoggerFactory protocol, or nil if not available." [] (try (Class/forName "foo.bar") ; eval removed

Re: Can't build clojure cloned from github - 2 tests failed - when running from cygwin

I'm not and don't feel like an expert to contribute. However I have found that this is a common pitfall Here is the full story described http://maven.apache.org/plugin-developers/common-bugs.html#Converting_between_URLs_and_Filesystem_Paths The same is in official doc from Oracle On 22 Lis, 12:4

Re: Proper parallelism?

There's an approach using agents described here: http://travis-whitton.blogspot.com/2009/07/network-sweeping-with-clojure.html It's a bit old, so somethings in the example could be a bit outdated, but the idea may help you forward, /Linus 2011/11/22 AndyK > I have been using Clojure to write

Proper parallelism?

I have been using Clojure to write tests on RESTful applications. Since the requests are independent, parallelizing would speed things along. What is the best approach? Using pmap is the obvious first step. Afaik, pmap only creates a small pool of threads. Is there more to gain by going to the Java

Re: Proposal: libraries should have type hints

Nicolas writes: > An interresting point of clojure is that it is dynamically typed. This > for a reason. There is a tradeoff in performance but the benefit is > that the code is shorter, more expressive and reusable. > > Type hinting should be exceptionnal and used only in critical areas > when y

Re: Proposal: libraries should have type hints

On 11/21/11 7:50 AM, Ralph wrote: I want to propose that Clojure libraries should be fully "type-hinted" -- that is, they should be compiled with the "*warn-on-reflection*" option turned on and type hints place wherever possible. I understand the argument against type-hinting end-user code until

ANN: core.match 0.2.0-alpha7 released

I just pushed a new release of core.match. The only significant change is that you can now match single values without needing to wrap in a vector. I was hoping to get to some of the bigger tickets but I'm tied up with miniKanren / core.logic research at the moment. If anyone feels like taking on

Re: clojure libs and logging

Hi, Do you have the :disable-implicit-clean option set to false in your project.clj file ? If not, add it to remove the classes from dependencies that otherwise may pollute your target. As far as "standard" logging in a lib, it might be time to rely on clojure.tools.logging systematically. We

clojure libs and logging

Folks-- I'm working on an experimental library which interfaces with external resources (i.e., not purely functional) and I'd like the library to log things when stuff goes wrong (say, with network connections). I don't want to throw exceptions and let clients handle it because I want to build

Re: Clojure on PyPy

On Tuesday, 22 November 2011 12:26:54 UTC+5:30, Andrzej wrote: > > On 11/22/2011 02:10 PM, Timothy Baldridge wrote: > > So I got thinking about clojure pypy tonight, and got thinking how > > easy it would be to adapt my old code to run as a interpreter. So I > > pulled in a few files, implemented

Re: Proposal: libraries should have type hints

Hi ! An interresting point of clojure is that it is dynamically typed. This for a reason. There is a tradeoff in performance but the benefit is that the code is shorter, more expressive and reusable. Type hinting should be exceptionnal and used only in critical areas when you see a huge boost in

deprecating butlast?

Hi, Why keep both butlast and drop-last in clojure.core? The latter has the advantage that it's lazy and can drop off more than one element from the end of a seq. In contrast, I can't think of any advantage of butlast, except that it seems to be slightly (ca 20%) faster than (doall (drop-last

Re: Can't build clojure cloned from github - 2 tests failed - when running from cygwin

I suspect that Windows users are a minority here, and cygwin users are a minority of that minority :) So I'm sure that help with maintaining cygwin compatibility would be appreciated. You should start by sending a contributor agreement: http://clojure.org/contributing - Chris -- You receive

*print-dup* and struct maps

Hi, I've encountered this behaviour of *print-dup*: user> (defstruct foo :field) #'user/foo user> (binding [*print-dup* true] (pr-str (struct foo 10))) "#=(clojure.lang.PersistentStructMap/create {:field 10})" user> (read-string (binding [*print-dup* true] (pr-str (struct foo 10 java.lang.Il

Re: Can't build clojure cloned from github - 2 tests failed - when running from cygwin

Here is the sample code which shows the difference (ns clojure.test-clojure.java.io (:use clojure.test clojure.java.io [clojure.test-helper :only [platform-newlines]]) (:import (java.io File BufferedInputStream FileInputStream InputStreamReader InputStream

Re: Clojure type selection flowchart: add a translation for your language

Hmm, wondering if having a formal datastructure representing this flowchart, and then deriving a "wizard" from this flowchart (text based in REPL, GUI based in CCW), would be fun ? (and maybe also useful ;-) ) 2011/11/17 Chas Emerick > For those that haven't seen it, I produced a flowchart earli

Re: Can't build clojure cloned from github - 2 tests failed - when running from cygwin

Sorry the line is 46 not 56 in the file https://github.com/richhickey/clojure/blob/master/test/clojure/test_clojure/java/io.clj On Nov 22, 11:39 am, Michael Jaaka wrote: > I have made some investigation and I noticed a problem at line 56 in > test/clojure/test_clojure/java/io.clj > > There is a d

Re: Can't build clojure cloned from github - 2 tests failed - when running from cygwin

I have made some investigation and I noticed a problem at line 56 in test/clojure/test_clojure/java/io.clj There is a difference between toURL and toURI first returns absolute path with spaces, second returns absolute path with %20 in places where the spaces should be now in cygwin and probably on

Re: Can't build clojure cloned from github - 2 tests failed - when running from cygwin

The classpath option -cp is not handling correctly the spaces. I'd suggest you to not have spaces in the Windows's paths. Install Java not in "c:\Program Files", but for example in c:\develop\Java6 On Tue, Nov 22, 2011 at 10:04 AM, Michael Jaaka wrote: > Here is too a problem with building prope

Re: Can't build clojure cloned from github - 2 tests failed - when running from cygwin

Maybe I can fix it? Just point me the routine for building path. I will extract it and make unit test which reproduces this error. Than I will fix it. Maybe it will help in both cases - on standalone emacs for windows and emacs in cygwin. On Nov 22, 10:04 am, Michael Jaaka wrote: > Here is too a

Re: Can't build clojure cloned from github - 2 tests failed - when running from cygwin

Here is too a problem with building proper path, after M-x clojure- jack-in I got in buffer Debugger entered--Lisp error: (error "Could not start swank server: java.lang.NoClassDefFoundError: Files\\Java\\jre6\\lib\\ext\\QTJava/ zip;\";;test;src;C:\\Java\\/lein\\self-installs\\leiningen-1/6/0- st

Re: Proposal: libraries should have type hints

On Nov 22, 7:30 am, Sean Corfield wrote: > On Mon, Nov 21, 2011 at 12:50 PM, Alan Malloy wrote: > > This is way, way faster than using reflection. And all you need in > > order to remove the duplication is a macro that does the hinting for > > you: > > Well, if Clojure/core decide contrib libra