Why can't I use/require namespaces not associated with files?
Hi all, why does the existance of a namespace not suffice to use or require it? Currently, with clojure 1.3, it has to be associated with a class or clojure file. Here's a simple example REPL session: --8<---cut here---start->8--- user> (ns test) nil test> (defn foo [x] (+ 2 x)) #'test/foo test> (in-ns 'user) # user> (test/foo 2) 4 user> (find-ns 'test) ;; finding works # user> (use 'test) ;; using doesn't work Could not locate test__init.class or test.clj on classpath: [Thrown class java.io.FileNotFoundException] ; Evaluation aborted user> (require '[test :as t]) ;; neither does requiring Could not locate test__init.class or test.clj on classpath: [Thrown class java.io.FileNotFoundException] ; Evaluation aborted user> (refer 'test);; referring does work nil user> (foo 2) 4 --8<---cut here---end--->8--- So while I can't use or require it, I can refer it. However, what I really want to do is to require it with some short alias. Unfortunately, refer doesn't support an :as option. Why I think I need that: I'm playing around with core.logic, and there I generate relations (defrel, which in the end defines a Var with def) from some spec I get at runtime. In order not to clutter *ns*, I do that in some new namespace by generating some do-form with ns and tons of defrels, and then evaling that. After the relations are there, I want to populate them with facts. Since there can be many fact bases for the relations, I use another namespace. In that, I want to easily access the relations using some prefix, as (require 'foo :as 'f) would allow. I can't really refer that namespace, because it's highly likely that some relation names clash with clojure.core defs. For the time being, I've changed my code a bit to prefix all relations with a +, but artificial prefixing is just not right if you have namespaces... Bye, Tassilo -- (What the world needs (I think) is not (a Lisp (with fewer parentheses)) but (an English (with more.))) Brian Hayes, http://tinyurl.com/3y9l2kf -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Review my code - delay-map
Meikel, That's very helpful. You and I took essentially the same approach - wrap a "real" map and delegate most operations to it. You used deftype, which I was afraid to try because there seemed to be too many interfaces and too many methods to implement, so I used proxy and APersistentMap to get some of it for free. I see from your code that there aren't nearly as many as I had feared. Your code has helped me to answer most of the questions I had. Thanks, - Chris -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Literate Programming example
Many of you asked me to show an example of a literate program and demonstrate the use of the tangle function. I usually use Latex for literate work but I've done this example using HTML and tags. I've written a self-referential literate program that explains the details of the tangle function in literate form. You can find the web page at http://daly.literatesoftware.com/lithtml/litprog.html and the source for the tangle function (which is in the web page but) http://daly.literatesoftware.com/lithtml/tangle.c I appreciate the time and attention you all gave me at the Clojure Conj. Hopefully someone will "catch the ah-ha" and write a literate program for next year's Conj. Tim Daly d...@literatesoftware.com -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Review my code - delay-map
Hi, glad it helped. There are still intresting questions. For example transients. It'd sure be interesting to have this also. Meikel -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Why can't I use/require namespaces not associated with files?
why does the existance of a namespace not suffice to use or require it? Currently, with clojure 1.3, it has to be associated with a class or clojure file. The primary purpose of both use and require is to load code from a file in classpath. So while I can't use or require it, I can refer it. However, what I really want to do is to require it with some short alias. Unfortunately, refer doesn't support an :as option. For the purpose you describe, alias should work. (:as uses alias to do its job) user> (doc alias) - clojure.core/alias ([alias namespace-sym]) Add an alias in the current namespace to another namespace. Arguments are two symbols: the alias to be used, and the symbolic name of the target namespace. Use :as in the ns macro in preference to calling this directly. --Steve -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Literate Programming example
On Nov 18, 2011, at 7:17 AM, daly wrote: > http://daly.literatesoftware.com/lithtml/litprog.html FYI, this is 404 at the moment. - Chas -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Literate Programming example
sigh. Try http://daly.axiom-developer.org/lithtml/litprog.html On Fri, 2011-11-18 at 07:46 -0500, Chas Emerick wrote: > On Nov 18, 2011, at 7:17 AM, daly wrote: > > > http://daly.literatesoftware.com/lithtml/litprog.html > > FYI, this is 404 at the moment. > > - Chas > -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Why can't I use/require namespaces not associated with files?
Stephen Gilardi writes: Hi! >> Currently, with clojure 1.3, it has to be associated with a class or >> clojure file. > > The primary purpose of both use and require is to load code from a > file in classpath. Sure. But when you say primary you imply there's also a secondary purpose. >> So while I can't use or require it, I can refer it. However, what I >> really want to do is to require it with some short alias. >> Unfortunately, refer doesn't support an :as option. > > For the purpose you describe, alias should work. (:as uses alias to do > its job) Hey, that looks like what I'm looking for. :-) Thanks a lot, Tassilo -- (What the world needs (I think) is not (a Lisp (with fewer parentheses)) but (an English (with more.))) Brian Hayes, http://tinyurl.com/3y9l2kf -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Literate Programming example
I believe I fixed it. Please try it again and let me know. Tim On Fri, 2011-11-18 at 07:46 -0500, Chas Emerick wrote: > On Nov 18, 2011, at 7:17 AM, daly wrote: > > > http://daly.literatesoftware.com/lithtml/litprog.html > > FYI, this is 404 at the moment. > > - Chas > -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Literate Programming example
it works for me. Las 2011/11/18 daly > I believe I fixed it. > Please try it again and let me know. > > Tim > > On Fri, 2011-11-18 at 07:46 -0500, Chas Emerick wrote: > > On Nov 18, 2011, at 7:17 AM, daly wrote: > > > > > http://daly.literatesoftware.com/lithtml/litprog.html > > > > FYI, this is 404 at the moment. > > > > - Chas > > > > > -- > 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 > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > -- László Török Skype: laczoka2000 Twitter: @laczoka -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
All Contributor Agreements from the Clojure/conj have been added
Over 50 new CAs have been signed. If you have signed one, you should see your name on this list: http://clojure.org/contributing. Thanks everybody! -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: ClojureScript: Should 'advanced optimizations' lead to faster execution? (or just faster loading)
On Nov 17, 5:18 pm, Paul Richards wrote: > Aside from loading times (due to different file sizes) and memory > usage (again due to different file sizes, minified field names, etc), > do we expect the optimized version to execute faster? Theoretically, yes, because GClosure Advanced Mode does some optimizations like inlining. In practice, probably not much, because a good JavaScript interpreter will do the same optimizations at runtime. -S -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Change var in other namespace
Thanks, Sean. Exactly what I was looking for.
IMO, clojure.tools.logging could of made this easier: log
implementation from classpath by default with override by client when
needed.
On Nov 17, 11:32 pm, Sean Corfield wrote:
> Note: if you just want something that will execute at startup and
> force _all_ logging to use log4j, instead of wrapping code in (binding
> ..) then you probably want something like this:
>
> (ns your.namespace
> (:require [clojure.tools.logging :as log])
> (:require [clojure.tools.logging.impl :as impl]))
>
> (alter-var-root (var log/*logger-factory*) (constantly (impl/log4j-factory)))
>
> This is what we ended with in our code to ensure log4j was selected at
> startup...
>
> Sean
>
>
>
>
>
>
>
> On Thu, Nov 17, 2011 at 7:04 PM, Mark Rathwell
> wrote:
> > You rebind dynamic vars with binding, so your use would look something
> > like this:
>
> > (binding [*logger-factory* (log-impl/log4j-factory)]
> > (do-stuff-with-the-logger-factory-rebound))
>
> > On Thu, Nov 17, 2011 at 5:17 PM, vitalyper wrote:
> >> clojure.tools.logging defines *logger-factory* and initializes it with
> >> first logger implementation on the class path
>
> >> (def ^{:doc
> >> "An instance satisfying the impl/LoggerFactory protocol. Used
> >> internally to
> >> obtain an impl/Logger. Defaults to the value returned from impl/
> >> find-factory."
> >> :dynamic true}
> >> *logger-factory*
> >> (impl/find-factory))
>
> >> In my own namespace I want to redefine *logger-factory* to log4j one.
> >> Tried different variations (def, set!, etc) in 1.3.0 with no avail.
> >> (ns my.foo
> >> (:gen-class)
> >> (:use
> >> [clojure.tools.logging :only (*logger-factory* info debug)])
> >> (:require
> >> [clojure.string :as s1]
> >> [clojure.tools.logging.impl :as log-impl])
> >> )
>
> >> (defn init-logging
> >> "Force log4j factory for core tools logging"
> >> []
> >> (def *logger-factory* (log-impl/log4j-factory)))
> >> ; CompilerException java.lang.IllegalStateException: *logger-factory*
> >> already refers to: #'clojure.tools.logging/*logger-factory* in
> >> namespace: infrared.common
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Re: Literate Programming example
On Nov 18, 1:17 pm, daly wrote: > Many of you asked me to show an example of a literate > program and demonstrate the use of the tangle function. Thanks to your perseverance, I am looking into practicing literate programming. However, I decided to settle for emacs org-mode environment with the literate elisp for the relevant code (abel'part of org-mode) being here : http://eschulte.github.com/org-babel/org-babel.org.html I found an example of clojure project (research on genetic programming) written in literate programming using babel org-mode for emacs is hosted here : http://gitweb.adaptive.cs.unm.edu/asm.git/tree I do hope that others find those resources as useful as I found them. Best Regards, Bernard -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Use of eval
Came across this code in clojure.tools.logging
(defn cl-factory
"Returns a Commons Logging-based implementation of the LoggerFactory
protocol, or
nil if not available."
[]
(try
(Class/forName "org.apache.commons.logging.Log")
(eval
`(do
(extend org.apache.commons.logging.Log
Logger
{:enabled?
(fn [logger# level#]
(condp = level#
:trace (.isTraceEnabled logger#)
:debug (.isDebugEnabled logger#)
:info (.isInfoEnabled logger#)
:warn (.isWarnEnabled logger#)
:error (.isErrorEnabled logger#)
:fatal (.isFatalEnabled logger#)
(throw (IllegalArgumentException. (str level#)
:write!
(fn [logger# level# e# msg#]
(if e#
(condp = level#
:trace (.trace logger# msg# e#)
:debug (.debug logger# msg# e#)
:info (.info logger# msg# e#)
:warn (.warn logger# msg# e#)
:error (.error logger# msg# e#)
:fatal (.fatal logger# msg# e#)
(throw (IllegalArgumentException. (str level#
(condp = level#
:trace (.trace logger# msg#)
:debug (.debug logger# msg#)
:info (.info logger# msg#)
:warn (.warn logger# msg#)
:error (.error logger# msg#)
:fatal (.fatal logger# msg#)
(throw (IllegalArgumentException. (str
level#))})
(reify LoggerFactory
(name [_#]
"org.apache.commons.logging")
(get-logger [_# logger-ns#]
(org.apache.commons.logging.LogFactory/getLog (str logger-
ns#))
(catch Exception e nil)))
I do understand what it does with extend and reify but I am not clear
why eval is needed here.
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Blog: SQL in Clojure
Hello, I wanted to summarize my thoughts on the current state of SQL in clojure, with respect to the new library, Korma, to get a discussion going. It turned out to be too long for the ML, so I blogged it: http://thinkrevoactevo.blogspot.com/2011/11/sql-in-clojure.html enjoy -- __ Herwig Hochleitner -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Use of eval
My speculation is that the eval is required in the case that commons-logger is not in the classpath. The code wouldn't compile without it. -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Use of eval
I don't think you are right - it does compiles without it. After more thinking my guess is that eval is used to combine extend and reify in the same function. Let's see if somebody else could shed a light on this. On Nov 18, 12:45 pm, Gary Trakhman wrote: > My speculation is that the eval is required in the case that commons-logger > is not in the classpath. The code wouldn't compile without it. -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Debugging Java heap space memory error with lazy sequences.
Thanks! To confirm my understanding: in my original version I defined (using def) a reference to a lazy sequence. I then evaluated it, using nth to pick a value from the sequence. Because I have a reference to the beginning of the sequence all the lazily generated items are retained. I.e. the lazy sequence is lazy only for the first time it works through the sequence instance, if there is a live reference to the sequence then those now generated elements remain, (to avoid the overhead of regenerating them?). By providing a function to return a new instance of the sequence each time, as in the solution Meikel has provided, I avoid retaining any references to the front of the sequence, and the garbage collector can do it's work. I always learn much better by making mistakes like these. Cheers, Julian. On Thu, Nov 17, 2011 at 9:49 PM, Meikel Brandmeyer wrote: > Hi, > > this is a “hold unto head” problem. > > Am 17.11.2011 um 15:06 schrieb Julian Kelsey: > > > (def seq-3s-n-5s > > (filter > > (fn [n] (or (= 0 (mod n 5)) (= 0 (mod n 3)) ) ) > > (iterate inc 1))) > > Here you keep a reference to the head of the generated by iterate. Make it > a function: > > (defn seq-3s-n-5s > [] > (filter #(or (zero? (mod % 5)) (zero? (mod % 3))) (iterate inc 1))) > > Then call it like this: > > (nth (sums (seq-3s-n-5s 0) (Math/pow 10 6)) > > That should fix your problem. > > Sincerely > Meikel > > -- > 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 > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Latest Bagwell paper for a new implementation of Clojure vectors ?
Are there currently any plans to eventually replace PersistentVector? Looking at the code, the upper limit for the number of elements that can be stored in PersistentVector is 32^6, which is quite a lot but still might become a real limitation in the near future. -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Literate Programming example
On Fri, 2011-11-18 at 07:07 -0800, bernardH wrote: > > On Nov 18, 1:17 pm, daly wrote: > > Many of you asked me to show an example of a literate > > program and demonstrate the use of the tangle function. > > Thanks to your perseverance, I am looking into practicing literate > programming. > > However, I decided to settle for emacs org-mode environment with the > literate elisp for the relevant code (abel'part of org-mode) > being here : http://eschulte.github.com/org-babel/org-babel.org.html > I found an example of clojure project (research on genetic > programming) written in literate programming using babel org-mode for > emacs > is hosted here : > http://gitweb.adaptive.cs.unm.edu/asm.git/tree > > I do hope that others find those resources as useful as I found them. I have nothing against org-mode. Indeed, I've been an emacs user since I could spell it. I believe the above examples are not literate programmings. They miss the point completely. They are using emacs org-mode for DOCUMENTATION. Literate programming is NOT documentation. It is a way to communicate from one person to another by starting from ideas and reducing them to practice. I may have missed the point but the above programs are just fancier ways of 1970 style coding using a new format tool. Compare the example I gave at http://axiom-developer.org/axiom-website/litprog.html with the above programs. See if you can spot a qualitative difference. My literate program tries to motivate the need for tangle, to explain why it works in a development context, and then gets down to details of implementation. It is a story. Where does this happen in the org-mode example? Perhaps I missed something but the author does not seem to be concentrating on communicating their ideas to me. Where did I go wrong? What emacs keystrokes get me a copy of the full document to read? Literate programming is about communication, not documentation. The org-mode tool is perfectly fine but be very, very careful not to miss this fundamental point. People should be able to just pick up clojure-core and read it like a novel, from ideas to implementation, and be able to understand it enough to change it. If your code can pass this "independence test" then your code is literate. Tim -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
repl dodges ns :use :only ?
I'm surprised that I can do the following. Am I wrong about namespaces? 1. M-x clojure-jack-in 2. at the repl, execute (ns my-proj.core) 3. compile my core.clj (see ns snippet below) 4. back in the repl, use a function from a library that wasn't included in the :only clause from my core.clj file: (ns my-proj.core (:use [clj-webdriver.core :as cw :only (attribute exists? find-it flash)])) I thought the :only clause here limits my use of the library to these four functions... But at the repl, I'm able to use cw/start ... -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: repl dodges ns :use :only ?
The :as clause establishes an alias for the entire clj-webdriver.core namespace. The value of :only lists the vars from that namespace that are referred into my-proj.core, which you can use without qualification e.g. `(attribute …)` will work, but `(start …)` won't. Both `(cw/attribute …)` and `(cw/start …)` will work because of the alias. - Chas On Nov 18, 2011, at 4:36 PM, Andrew wrote: > I'm surprised that I can do the following. Am I wrong about namespaces? > M-x clojure-jack-in > at the repl, execute (ns my-proj.core) > compile my core.clj (see ns snippet below) > back in the repl, use a function from a library that wasn't included in the > :only clause from my core.clj file: > (ns my-proj.core > (:use [clj-webdriver.core :as cw :only (attribute > exists? > find-it > flash)])) > > I thought the :only clause here limits my use of the library to these four > functions... But at the repl, I'm able to use cw/start ... > > -- > 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 > Note that posts from new members are moderated - please be patient with your > first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Use of eval
I get this when i try it in a blank project, removing the eval and the quote: Unknown location: error: java.lang.ClassNotFoundException: org.apache.commons.logging.Log core.clj:16:8: error: java.lang.ClassNotFoundException: org.apache.commons.logging.Log (core.clj:16) Compilation failed. -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: repl dodges ns :use :only ?
Oh, thanks. Is there a way to "import" some functions and not others such that the others cannot be used at all? -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: repl dodges ns :use :only ?
Sure, just remove the :as argument: (ns example.ns (:use [clojure.string :only (join)]) On Friday, November 18, 2011, Andrew wrote: > Oh, thanks. Is there a way to "import" some functions and not others such that the others cannot be used at all? > > -- > 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 > Note that posts from new members are moderated - please be patient with your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en -- Sam Ritchie, Twitter Inc 703.662.1337 @sritchie09 (Too brief? Here's why! http://emailcharter.org) -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Probabilistic programming in clojure
On Nov 18, 8:05 am, Konrad Hinsen wrote: > --On 17 novembre 2011 15:09:11 -0800 Nils Bertschinger > > wrote: > > The two approaches are somewhat complementary to each other. Your > > monad does exact inference on discrete distributions by running > > through all possibilities. Mine is sampling based and does approximate > > inference using MCMC. > > I tried that approach as well: > > https://github.com/richhickey/clojure-contrib/blob/master/src/main/cl... > > but I never used it much because for my own applications, exact inference > was very doable. I'll check out yours for comparison! Just checked your implementation, the stream approach is indeed quite nice to thread random numbers through programs. It seems that I handle downstream conditioning somewhat different. The stream can basically be filtered to implement rejection sampling, whereas I thread a database state through the program to record all random choices (as well as their probability) that have been taken. That way conditioning does not have to be based on rejection, but is simply accounted for by including the probability of the conditioned value. Then I can propose a change to this database store, re-run the program and implement Metropolis Hastings sampling on top of this, i.e. test whether the change increased the probability of the random decisions taken throughout the program and either accept or reject it accordingly. Your stream approach can probably be nicely extended to particle filters. I'll think about that ... Nils > > Konrad. -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Change var in other namespace
On Fri, Nov 18, 2011 at 6:35 AM, vitalyper wrote: > IMO, clojure.tools.logging could of made this easier: log > implementation from classpath by default with override by client when > needed. I agree but when I brought the issue up, there didn't seem to be much support for making it easier... Perhaps a ticket in JIRA might garner some votes? -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ "Perfection is the enemy of the good." -- Gustave Flaubert, French realist novelist (1821-1880) -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Literate Programming example
On Friday, November 18, 2011 7:17:08 AM UTC-5, TimDaly wrote: > > Many of you asked me to show an example of a literate > program and demonstrate the use of the tangle function. > > I usually use Latex for literate work but I've done > this example using HTML and tags. > > I've written a self-referential literate program that > explains the details of the tangle function in literate > form. You can find the web page at > > http://daly.literatesoftware.com/lithtml/litprog.html > I have read your literate program, and must recognize that I know how tangle works even though I didn't want to really read the source code. I read your prose all the way through. I still haven't read the source code; I didn't feel the need to read it. Were I to maintain your program, I'd have more than enough confidence to start hacking the code right now. I think this speaks very positively about literate programming. What remains to be seen is how much (or not) I'm going to practice it in the future. What do you think of marginalia? It's a bit the reverse of tangle; it assembles all those 70's files together into this book you might want to read. Is it sound or not? Have your thoughts changed from what you wrote in [1]? [1] http://goo.gl/cXWzF -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Literate Programming example
On Fri, 2011-11-18 at 20:02 -0800, Daniel Jomphe wrote: > On Friday, November 18, 2011 7:17:08 AM UTC-5, TimDaly wrote: > Many of you asked me to show an example of a literate > program and demonstrate the use of the tangle function. > > I usually use Latex for literate work but I've done > this example using HTML and tags. > > I've written a self-referential literate program that > explains the details of the tangle function in literate > form. You can find the web page at > > http://daly.literatesoftware.com/lithtml/litprog.html > > I have read your literate program, and must recognize that I know how > tangle works even though I didn't want to really read the source code. > I read your prose all the way through. I still haven't read the source > code; In fact, that's the whole point. You don't read the equations in a calculus textbook either. You read the words. The equations are icons. If you understood the text and "spoke" mathematics you could probably write the equations. In programming we can reach the same level of literacy. Reading just the words in the literate version it should be possible to recreate the program in your favorite language. Note that you would be creating a different program with different design decisions but the same functionality. > I didn't feel the need to read it. Were I to maintain your program, > I'd have more than enough confidence to start hacking the code right > now. One thing worth trying would be to code the same program in Clojure. The tangle program is conceptually very simple but there are a lot of low level design decisions that I would make differently. For example, there are loops in the C program which would go away. Would you map read or would you slurp? Mapping a read function allows transforming "& lt;" to < at read time. This does not matter in the C program because the buffer is mutable but it would matter in Clojure. Would you use the Clojure pattern language to find the tags? Would you be able to parse out the string from the id? C encourages character-level hacking but Clojure would be much more powerful. > > > I think this speaks very positively about literate programming. What > remains to be seen is how much (or not) I'm going to practice it in > the future. If you do try to rewrite it in Clojure please post the program. I would be very interested to see how Clojure's concise syntax and semantics get reflected in your design decisions. The tangle program in Clojure might turn out to be a single s-expression of only a few lines. The code density would be a huge win but a literate version would still have to have the vitals of the story. Remember that the key test for a literate program is the "independence test". Someone can read it without talking to you, understand how it works, and be able to change it. > > > What do you think of marginalia? It's a bit the reverse of tangle; it > assembles all those 70's files together into this book you might want > to read. Is it sound or not? Have your thoughts changed from what you > wrote in [1]? > > > [1] http://goo.gl/cXWzF Literate programming is a mindset, not a tool. You can write a literate program in anything, including marginalia. That said, I have yet to see a Clojure program that lays out a story so I can sit and read it. For a real challenge, if you try to write tangle in Clojure, try writing the story in marginalia. I'm sure Fogus would welcome the feedback. The readability aspect is a real feature. Heck, you could even give your programs to a company so they could read them BEFORE the job interview. I would strongly favor hiring someone who could communicate, who cared about code quality, and who could improve the company's maintenance headache in the long term. A Literate Clojure programmer would be a real gotta-hire person. Companies use many programming languages but all programmers really do need good communication skills. In the long view, it would be sweet if the Clojure reader knew how to read a literate program. Just call "(literate-load file chunk)" and you get the same effect as if you had tangled the program to a file. With literate-load available you would be able to write all of your Clojure code in a literate style, making Clojure much easier to understand, maintain, and modify. Tim Daly -- 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 Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
