Re: Why is a non-transient `into` faster than the built-in one?
On my repl into is consistently faster. What versions of clojure, java and the OS are you running? -- 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 is a non-transient `into` faster than the built-in one?
Hi, I'm using Clojure1.4.0, Java1.6 on MacOS. user= (clojure-version) 1.4.0 ~ satoru$ java -version java version 1.6.0_35 Java(TM) SE Runtime Environment (build 1.6.0_35-b10-428-11M3811) Java HotSpot(TM) 64-Bit Server VM (build 20.10-b01-428, mixed mode) On Sunday, November 4, 2012 2:18:15 PM UTC+8, Herwig Hochleitner wrote: On my repl into is consistently faster. What versions of clojure, java and the OS are you running? -- 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: impossible to create classes for non-closure environment
Thank you Stephen, the problem is that it is impossible to create create a Java class using closure with the following characteristics: 1) all methods must match given Java signature. For example, if I need a method public String getSomeString(); all I get is public Object getSomeString(); closure ignores my String hints and always uses Object instead. 2) must be no references to any closure classes. Now the closure compiler unconditionally creates at least one extra method public static IPersistentVector getBasis() which references several classes from closure runtime. Regards, Vladimir On Sat, 2012-11-03 at 13:57 -0700, Vladimir Tsichevski wrote: In one of my purely Java project I have to create hundreds of java classes with repeatable structure, so the task is an excellent candidate for automation. I hoped I will be able to create these classes with the latest closure, using the 'deftype' construct. If you know all the details of classes to create at compile time, you can use macros instead, which are perfectly well able to output deftype forms. Untested: (defmacro defrefs Make a bunch of :x boxes. [ names] `(do ~@(map (fn [name] `(defrecord ~name [~'x])) names))) ;; makes classes foo, bar, baz, qux, quux, all with the :x field. (defrefs foo bar baz qux quux) -- Stephen Compall ^aCollection allSatisfy: [:each|aCondition]: less is better -- 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 is a non-transient `into` faster than the built-in one?
I get big fluctuation in results for bot naive-into and into, ranging from
400ms to 1500ms.
This is probably because of the GC kicking in and influencing timings.
Changing timings to something like:
(System/gc) (time (do (into #{} (range 1e6)) nil))
and
(System/gc) (time (do (naive-into #{} (range 1e6)) nil))
gives much more consistent results with almost no variance, and on my box I
get ~380 for into, and ~580 for naive-into
Cheers,
Marko
On Sunday, November 4, 2012 8:36:19 AM UTC+1, Satoru Logic wrote:
Hi, I'm using Clojure1.4.0, Java1.6 on MacOS.
user= (clojure-version)
1.4.0
~ satoru$ java -version
java version 1.6.0_35
Java(TM) SE Runtime Environment (build 1.6.0_35-b10-428-11M3811)
Java HotSpot(TM) 64-Bit Server VM (build 20.10-b01-428, mixed mode)
On Sunday, November 4, 2012 2:18:15 PM UTC+8, Herwig Hochleitner wrote:
On my repl into is consistently faster.
What versions of clojure, java and the OS are you running?
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Seems like bug in clojure-1.4.0
ru@ru-maclin:~/ProtegeClojureOMTabs-1.5/lib_ext$ java -jar clojure-1.4.0.jar Clojure 1.4.0 user= (read-string 07) 7 user= (read-string 09) NumberFormatException Invalid number: 09 clojure.lang.LispReader.readNumber (LispReader.java:253) user= (read-string 08) NumberFormatException Invalid number: 08 clojure.lang.LispReader.readNumber (LispReader.java:253) user= (read-string 06) 6 user= (read-string 05) 5 user= (read-string 04) 4 user= (read-string 03) 3 user= (read-string 02) 2 user= (read-string 01) 1 user= (read-string 00) 0 Sincerely, Ru -- 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: Seems like bug in clojure-1.4.0
Thank you, Bronsa! Sincerely, Ru воскресенье, 4 ноября 2012 г., 14:27:30 UTC+4 пользователь Bronsa написал: Number prefixed by 0 are read by the clojure reader as octals. So the decimal 8 is 010 2012/11/4 ru sor...@oogis.ru javascript: ru@ru-maclin:~/ProtegeClojureOMTabs-1.5/lib_ext$ java -jar clojure-1.4.0.jar Clojure 1.4.0 user= (read-string 07) 7 user= (read-string 09) NumberFormatException Invalid number: 09 clojure.lang.LispReader.readNumber (LispReader.java:253) user= (read-string 08) NumberFormatException Invalid number: 08 clojure.lang.LispReader.readNumber (LispReader.java:253) user= (read-string 06) 6 user= (read-string 05) 5 user= (read-string 04) 4 user= (read-string 03) 3 user= (read-string 02) 2 user= (read-string 01) 1 user= (read-string 00) 0 Sincerely, Ru -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.comjavascript: Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com javascript: 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: Why is a non-transient `into` faster than the built-in one?
On Sunday, November 4, 2012 6:20:37 PM UTC+8, Marko Kocić wrote:
I get big fluctuation in results for bot naive-into and into, ranging from
400ms to 1500ms.
This is probably because of the GC kicking in and influencing timings.
Changing timings to something like:
(System/gc) (time (do (into #{} (range 1e6)) nil))
and
(System/gc) (time (do (naive-into #{} (range 1e6)) nil))
gives much more consistent results with almost no variance, and on my box
I get ~380 for into, and ~580 for naive-into
I still can't get consistent results with this.
BTW, what does System/gc do, I can't use `doc` on it.
Cheers,
Marko
On Sunday, November 4, 2012 8:36:19 AM UTC+1, Satoru Logic wrote:
Hi, I'm using Clojure1.4.0, Java1.6 on MacOS.
user= (clojure-version)
1.4.0
~ satoru$ java -version
java version 1.6.0_35
Java(TM) SE Runtime Environment (build 1.6.0_35-b10-428-11M3811)
Java HotSpot(TM) 64-Bit Server VM (build 20.10-b01-428, mixed mode)
On Sunday, November 4, 2012 2:18:15 PM UTC+8, Herwig Hochleitner wrote:
On my repl into is consistently faster.
What versions of clojure, java and the OS are you running?
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Re: Why is a non-transient `into` faster than the built-in one?
On Sunday, November 4, 2012 11:41:23 AM UTC+1, Satoru Logic wrote:
On Sunday, November 4, 2012 6:20:37 PM UTC+8, Marko Kocić wrote:
I get big fluctuation in results for bot naive-into and into, ranging
from 400ms to 1500ms.
This is probably because of the GC kicking in and influencing timings.
Changing timings to something like:
(System/gc) (time (do (into #{} (range 1e6)) nil))
and
(System/gc) (time (do (naive-into #{} (range 1e6)) nil))
gives much more consistent results with almost no variance, and on my box
I get ~380 for into, and ~580 for naive-into
I still can't get consistent results with this.
BTW, what does System/gc do, I can't use `doc` on it.
System/gc is a call to Java System.gc() which basically hints the JVM to
run garbage collector. Whether it will actually run it depends on many
factors, like your java version, various GC settings and memory settings.
If you don't specify those settings on the cmdline, java decides on its own
based on your system. It is quite possible that it just has to trigger
garbage collector during execution of timing on your system, while it
doesn't have to on my system. I'm running jdk 1.7 on 64bit linux, btw.
You can find more details of GC tuning here:
http://www.oracle.com/technetwork/java/javase/gc-tuning-6-140523.html
Cheers,
Marko
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Re: Why is a non-transient `into` faster than the built-in one?
BTW, I can't even reproduce the examples here:
http://clojure.org/Transients#toc5
On Sunday, November 4, 2012 6:49:50 PM UTC+8, Marko Kocić wrote:
On Sunday, November 4, 2012 11:41:23 AM UTC+1, Satoru Logic wrote:
On Sunday, November 4, 2012 6:20:37 PM UTC+8, Marko Kocić wrote:
I get big fluctuation in results for bot naive-into and into, ranging
from 400ms to 1500ms.
This is probably because of the GC kicking in and influencing timings.
Changing timings to something like:
(System/gc) (time (do (into #{} (range 1e6)) nil))
and
(System/gc) (time (do (naive-into #{} (range 1e6)) nil))
gives much more consistent results with almost no variance, and on my
box I get ~380 for into, and ~580 for naive-into
I still can't get consistent results with this.
BTW, what does System/gc do, I can't use `doc` on it.
System/gc is a call to Java System.gc() which basically hints the JVM to
run garbage collector. Whether it will actually run it depends on many
factors, like your java version, various GC settings and memory settings.
If you don't specify those settings on the cmdline, java decides on its own
based on your system. It is quite possible that it just has to trigger
garbage collector during execution of timing on your system, while it
doesn't have to on my system. I'm running jdk 1.7 on 64bit linux, btw.
You can find more details of GC tuning here:
http://www.oracle.com/technetwork/java/javase/gc-tuning-6-140523.html
Cheers,
Marko
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Re: Proposal/request: Give clojure.core/conj a unary implementation
It would be nice if clojure.core/conj had a unary implementation ([coll] coll) I support this. Reasons: 1. It makes sense, adding nothing to something should give back the something. 2. It's consistent with disj as mentioned. 3. Supporting edge cases like this can make some algorithms much more succinct. (as in CGAT's code - no need to check for extra cases) Compare: (conj nil 3) = (3) Jonathan -- 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
Java-to-Clojure source translation?
Hi gurus, I wonder if there are any means that'd help me translate Java sources to Clojure? I do not expect getting working Closure code OOTB, just anything to start from. Regards, Vladimir -- 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: Java-to-Clojure source translation?
Why do you want this? If you have java code you can just call it from clojure.no need for translation Am 04.11.2012 19:39 schrieb Vladimir Tsichevski tsichev...@gmail.com: Hi gurus, I wonder if there are any means that'd help me translate Java sources to Clojure? I do not expect getting working Closure code OOTB, just anything to start from. Regards, Vladimir -- 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: Java-to-Clojure source translation?
Hi Maik, no, I need to re-implement existing code in Clojure. Why do you want this? If you have java code you can just call it from clojure.no need for translation Am 04.11.2012 19:39 schrieb Vladimir Tsichevski tsich...@gmail.comjavascript: : Hi gurus, I wonder if there are any means that'd help me translate Java sources to Clojure? I do not expect getting working Closure code OOTB, just anything to start from. Regards, Vladimir -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.comjavascript: Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com javascript: 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: Java-to-Clojure source translation?
A direct translation is often not a good idea because java uses so much mutable stateand this is really not idiomatic in clojure.but it will be a helpful experience to make the java code to functional clojure code. IMO calling java code from clojure is better as a direct translation with all that mutable code. perhaps you can say more about what you are trying to achieve. I hope I could help Am 04.11.2012 20:26 schrieb Vladimir Tsichevski tsichev...@gmail.com: Hi Maik, no, I need to re-implement existing code in Clojure. Why do you want this? If you have java code you can just call it from clojure.no need for translation Am 04.11.2012 19:39 schrieb Vladimir Tsichevski tsich...@gmail.com: Hi gurus, I wonder if there are any means that'd help me translate Java sources to Clojure? I do not expect getting working Closure code OOTB, just anything to start from. Regards, Vladimir -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@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+u...@**googlegroups.com For more options, visit this group at http://groups.google.com/**group/clojure?hl=enhttp://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 -- 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: Proposal/request: Give clojure.core/conj a unary implementation
On Sunday, November 4, 2012 12:43:22 AM UTC+1, Ben wrote: There might be a reason to write (apply f coll seqable) in a situation in which f might be conj, though. One may use (reduce f coll seqable) instead, if that makes sense semantically in that context. -- 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: impossible to create classes for non-closure environment
Hello, Clojure (by the way, it is not spelled closure) is not really designed to generate pure-Java classes. `gen-class` is slightly more flexible than `deftype`, but it will still generate references to Clojure classes. If the structure of your Java classes is defined by interfaces, `deftype` can implement those interfaces. But if the structure of the Java classes is very regular, you may find it easier to generate Java source code as strings. That's how all the primitive interfaces in clojure.lang.IFn were created. -S On Sunday, November 4, 2012 4:43:59 AM UTC-5, Vladimir Tsichevski wrote: Thank you Stephen, the problem is that it is impossible to create create a Java class using closure with the following characteristics: 1) all methods must match given Java signature. For example, if I need a method public String getSomeString(); all I get is public Object getSomeString(); closure ignores my String hints and always uses Object instead. 2) must be no references to any closure classes. Now the closure compiler unconditionally creates at least one extra method public static IPersistentVector getBasis() which references several classes from closure runtime. Regards, Vladimir On Sat, 2012-11-03 at 13:57 -0700, Vladimir Tsichevski wrote: In one of my purely Java project I have to create hundreds of java classes with repeatable structure, so the task is an excellent candidate for automation. I hoped I will be able to create these classes with the latest closure, using the 'deftype' construct. If you know all the details of classes to create at compile time, you can use macros instead, which are perfectly well able to output deftype forms. Untested: (defmacro defrefs Make a bunch of :x boxes. [ names] `(do ~@(map (fn [name] `(defrecord ~name [~'x])) names))) ;; makes classes foo, bar, baz, qux, quux, all with the :x field. (defrefs foo bar baz qux quux) -- Stephen Compall ^aCollection allSatisfy: [:each|aCondition]: less is better -- 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
pattern-matching in Closure?
Hi gurus. Is it possible in Clojure to use pattern matching, like I can with Bigloo scheme, for example: (match-case '(a b a) ((?x ?x) 'foo) ((?x ?- ?x) 'bar)) Regards, Vladimir -- 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: Java-to-Clojure source translation?
Hello, It is not really possible to make a direct translation from Java to Clojure. Java has mutable variables and imperative flow-control, for which there is no equivalent in Clojure. -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: pattern-matching in Closure?
Use core.match: https://github.com/clojure/core.match On Sun, Nov 4, 2012 at 10:09 PM, Vladimir Tsichevski tsichev...@gmail.com wrote: Hi gurus. Is it possible in Clojure to use pattern matching, like I can with Bigloo scheme, for example: (match-case '(a b a) ((?x ?x) 'foo) ((?x ?- ?x) 'bar)) Regards, Vladimir -- 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: Java-to-Clojure source translation?
Hi Stuart. On Monday, November 5, 2012 1:10:36 AM UTC+4, Stuart Sierra wrote: Hello, It is not really possible to make a direct translation from Java to Clojure. Java has mutable variables and imperative flow-control, for which there is no equivalent in Clojure. -S That's why I'm looking for means which could HELP me rewrite my code base to Clojure, not to produce compilable and runnable code. Just parse Java syntax tree and pretty-print it back as Clojure-like text. Regards, Vladimir -- 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: pattern-matching in Closure?
Hi Moritz, this looks promising. Do you know where can I get any documentation/examples for this module? Regards, Vladimir On Monday, November 5, 2012 1:10:59 AM UTC+4, Moritz Ulrich wrote: Use core.match: https://github.com/clojure/core.match On Sun, Nov 4, 2012 at 10:09 PM, Vladimir Tsichevski tsich...@gmail.com javascript: wrote: Hi gurus. Is it possible in Clojure to use pattern matching, like I can with Bigloo scheme, for example: (match-case '(a b a) ((?x ?x) 'foo) ((?x ?- ?x) 'bar)) Regards, Vladimir -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.comjavascript: Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com javascript: 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: Java-to-Clojure source translation?
On Sun, 2012-11-04 at 13:18 -0800, Vladimir Tsichevski wrote: That's why I'm looking for means which could HELP me rewrite my code base to Clojure, not to produce compilable and runnable code. Just parse Java syntax tree and pretty-print it back as Clojure-like text. I think the thesis of this thread is that, from the perspective of varying levels of Clojure expertise, such means would be more of a hindrance than a help in your goal. -- Stephen Compall ^aCollection allSatisfy: [:each | aCondition]: less is better than -- 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 is a non-transient `into` faster than the built-in one?
These are my results using (dotimes (time (dotimes ...))) combo to get
consistent results:
- on sets:
(dotimes [i 10] (time (dotimes [j 100] (into #{} (range 1e4)
Elapsed time: 388.595226 msecs
Elapsed time: 406.666801 msecs
Elapsed time: 421.559753 msecs
Elapsed time: 444.719263 msecs
Elapsed time: 431.319374 msecs
Elapsed time: 392.3779 msecs
Elapsed time: 392.382365 msecs
Elapsed time: 408.71734 msecs
Elapsed time: 444.203973 msecs
Elapsed time: 442.351363 msecs
(dotimes [i 10] (time (dotimes [j 100] (naive-into #{} (range 1e4)
Elapsed time: 1287.412806 msecs
Elapsed time: 1318.931199 msecs
Elapsed time: 1314.773064 msecs
Elapsed time: 1292.664029 msecs
Elapsed time: 1277.616099 msecs
Elapsed time: 1289.514678 msecs
Elapsed time: 1700.74875 msecs
Elapsed time: 1352.734662 msecs
Elapsed time: 1464.09882 msecs
Elapsed time: 1449.704738 msecs
- on vectors:
(dotimes [i 10] (time (dotimes [j 100] (into [] (range 1e4)
Elapsed time: 307.838501 msecs
Elapsed time: 243.426624 msecs
Elapsed time: 234.013566 msecs
Elapsed time: 247.711805 msecs
Elapsed time: 253.154264 msecs
Elapsed time: 284.375476 msecs
Elapsed time: 227.773865 msecs
Elapsed time: 247.807286 msecs
Elapsed time: 240.959477 msecs
Elapsed time: 230.627513 msecs
(dotimes [i 10] (time (dotimes [j 100] (naive-into [] (range 1e4)
Elapsed time: 406.55752 msecs
Elapsed time: 419.365134 msecs
Elapsed time: 413.544069 msecs
Elapsed time: 410.892756 msecs
Elapsed time: 394.827165 msecs
Elapsed time: 407.338251 msecs
Elapsed time: 441.60916 msecs
Elapsed time: 401.721826 msecs
Elapsed time: 412.7506 msecs
Elapsed time: 399.972445 msecs
Clojure 1.4.0
java version 1.6.0_26
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) Server VM (build 20.1-b02, mixed mode)
Cheers.
Marek.
On Sunday, November 4, 2012 3:41:14 AM UTC+1, Satoru Logic wrote:
Hi, all.
I am following an example demonstrating that `transient` can help optimize
mass updates to data structures:
First, a function is defined, which doesn't use transient collection:
(defn naive-into
[coll source]
(reduce conj coll source))
This is supposed to run slower than the built-in `into`, because, as the
book said, `into` uses transient collections whenever possible.
But the result shows up in my `repl` is just the reverse.
user= (time (do (into #{} (range 1e6)) nil))
Elapsed time: 4882.176 msecs
nil
user= (time (do (naive-into #{} (range 1e6)) nil))
Elapsed time: 3745.707 msecs
nil
What could be the reason of this?
--
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Re: pattern-matching in Closure?
At the wiki: https://github.com/clojure/core.match/wiki :-) Marek. On Sunday, November 4, 2012 11:03:40 PM UTC+1, Vladimir Tsichevski wrote: Hi Moritz, this looks promising. Do you know where can I get any documentation/examples for this module? Regards, Vladimir On Monday, November 5, 2012 1:10:59 AM UTC+4, Moritz Ulrich wrote: Use core.match: https://github.com/clojure/core.match On Sun, Nov 4, 2012 at 10:09 PM, Vladimir Tsichevski tsich...@gmail.com wrote: Hi gurus. Is it possible in Clojure to use pattern matching, like I can with Bigloo scheme, for example: (match-case '(a b a) ((?x ?x) 'foo) ((?x ?- ?x) 'bar)) Regards, Vladimir -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@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+u...@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: pattern-matching in Closure?
Excellent! Thanks! On Monday, November 5, 2012 2:12:16 AM UTC+4, Marek Šrank wrote: At the wiki: https://github.com/clojure/core.match/wiki :-) Marek. On Sunday, November 4, 2012 11:03:40 PM UTC+1, Vladimir Tsichevski wrote: Hi Moritz, this looks promising. Do you know where can I get any documentation/examples for this module? Regards, Vladimir On Monday, November 5, 2012 1:10:59 AM UTC+4, Moritz Ulrich wrote: Use core.match: https://github.com/clojure/core.match On Sun, Nov 4, 2012 at 10:09 PM, Vladimir Tsichevski tsich...@gmail.com wrote: Hi gurus. Is it possible in Clojure to use pattern matching, like I can with Bigloo scheme, for example: (match-case '(a b a) ((?x ?x) 'foo) ((?x ?- ?x) 'bar)) Regards, Vladimir -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@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+u...@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: Java-to-Clojure source translation?
On Nov 4, 2012, at 1:10 PM, Stuart Sierra wrote: Hello, It is not really possible to make a direct translation from Java to Clojure. Java has mutable variables and imperative flow-control, for which there is no equivalent in Clojure. -S First, some suggestions that are not recommended, because they are fraught with perils if you go that way. I mention them in case for some reason you like making your life difficult, or really want to be ultra-careful to use these correctly in multi-threaded programs. They can be useful if you have some inner loop that needs screaming performance tweaks and for some reason you want written in Clojure, not Java, e.g. you are writing toy programs for benchmarks like I've spent too much time on: http://shootout.alioth.debian.org/u64q/compare.php?lang=clojure There is with-local-vars that can help you write more imperative style code if you really really want to, but it is very rarely if ever used in Clojure code I have seen and written. Short example: http://clojuredocs.org/clojure_core/clojure.core/with-local-vars As far as I know, with-local-vars actually doesn't introduce problems with multi-threaded programs, because the variables it creates can only be modified from a single thread, textually within the boundary of the with-local-vars in your program. I could be wrong about that, though, if you were devious enough to pass a function that did set-var in a future or something like that. There is also deftype which permits you to create mutable fields in an object, again with big warning bells that if you ever use such objects from more than one thread and don't know what you are doing, you are likely introducing subtle hard-to-find bugs. It isn't too difficult to use mutable Java arrays from within Clojure. I agree with the other responders, Vladimir, that the two methods that will give you the most satisfying final result would be: (1) Call already-written Java code from Clojure, while being as careful as you would in pure Java code of mutable state and side effects of the calls you are making or (2) Rewrite the code by hand, starting from what the functionality is that you want to achieve, and writing it in a more Clojure-like style. Writing code in a more functional style tends to make global changes to the structure of the code, not just local method-by-method or function-by-function changes. This takes much more time, and for programs with any complexity at all you'd have to do lots of re-testing to ensure your Clojure implementation was correct, but the end result should be more maintainable. Andy -- 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: Proposal/request: Give clojure.core/conj a unary implementation
I created CLJ-1103 and attached a patch that makes this change, as well as related changes to conj! assoc assoc! and dissoc! (dissoc, disj and disj! already handled these cases). http://dev.clojure.org/jira/browse/CLJ-1103 Andy On Nov 4, 2012, at 5:52 AM, Jonathan Fischer Friberg wrote: It would be nice if clojure.core/conj had a unary implementation ([coll] coll) I support this. Reasons: 1. It makes sense, adding nothing to something should give back the something. 2. It's consistent with disj as mentioned. 3. Supporting edge cases like this can make some algorithms much more succinct. (as in CGAT's code - no need to check for extra cases) Compare: (conj nil 3) = (3) Jonathan -- 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: Playing with clojure-encog, Machine-Learning wrapper
Well darn it. Had a detailed response ready to go and found that GG does not save drafts. POS. Movin on. The upshot was I tried predicting tick data (see attachment) with a model pretty much identical to the one given here with little real success. It would only resolve if I removed all of the discontinuities in the data - that came to over 20% of the data) The resulting fantasy set failed to predict trends that were not in the set with (15% success rate maximum) The conclusion I came to is that actual tick data (which is aggregate of all trading) is not predictable with the given model. NNs (certainly backprop) just try to spline a curve through a training set of input/ouput exemplars. Tick data simply does not seem to provide such a curve. Equivalent to stating what is obvious - stock markets are unpredictable from moment to moment). However one approach that occurred to me was rather than using aggregate tick data, rather use historical data from a given single brokerage that is known to use automated trading. Rather than trying to learn a dog-breakfast of influences given by aggregate data, non-aggregated direct data coming direct from a automated trading algo should prove to be a likely subject for machine-learning. However, if John Nash was correct then these systems would deliberately make bad trades in order to be less predictable. Can't do too much of that though :) There are plenty of examples in Java of backprop. It is well known, and since you are using a known library I doubt there are errors in it, other than sub-optimal coding. Historical FIX data (non-aggregated direct trading transactions) is generally not published anywhere. The model being explored here would be very useful if it were. Cheers! Dominic Cerisano On Sunday, August 5, 2012 2:27:35 PM UTC-4, frye wrote: Hey all, This post is a fork of a thread in the post community interest in machine learninghttps://groups.google.com/forum/?fromgroups#!topic/clojure/heBrnBuUGqs. Some of us were starting to take a deep dive into clojure-encoghttps://github.com/jimpil/clojure-encog and I thought it would be a good idea to have a new thread for that. So I took a look at the way encog-javahttps://github.com/encog/encog-java-core (what clojure-encog https://github.com/jimpil/clojure-encog wraps) loads tick data into it's system. There is a YahooFinanceLoaderhttps://github.com/encog/encog-java-core/blob/master/src/main/java/org/encog/ml/data/market/loader/YahooFinanceLoader.javathat pulls csv data from a URL. But it assumes that prices only have a daily granularity. Now, the encog-java system seems to have the concept of granularity going down to the second (see herehttps://github.com/encog/encog-java-core/blob/master/src/main/java/org/encog/util/time/TimeUnit.java). But all of it's market loaders and list of ticks, seem to stop at a time granularity of daily. See the LoadedMarketData sourcehttps://github.com/encog/encog-java-core/blob/master/src/main/java/org/encog/ml/data/market/loader/LoadedMarketData.java, which uses a daily-biased MarketDataTypehttps://github.com/encog/encog-java-core/blob/master/src/main/java/org/encog/ml/data/market/MarketDataType.java. Obviously, that's not enough if we want to calculate on a second or sub-second interval. Ultimately the YahooFinanceLoader will give us a list of LoadedMarketData, which assumes daily price ticks. What I need to know is can I give the encog neural net a list of tick data that has second or sub-second intervals? Back over the clojure-encog, the thing that normalizes input data, the make-datahttps://github.com/jimpil/clojure-encog/blob/master/src/clojure_encog/training.clj#L41function only deals with doubles (not a list of tick data entries). The make-trainer and trainhttps://github.com/jimpil/clojure-encog/blob/master/src/clojure_encog/training.clj#L137functions seem to iterate for the number of strategies that you've specified. But I can't see in BackPropogationhttps://github.com/encog/encog-java-core/blob/master/src/main/java/org/encog/neural/networks/training/propagation/back/Backpropagation.javaor it's superclasshttps://github.com/encog/encog-java-core/blob/master/src/main/java/org/encog/neural/networks/training/propagation/Propagation.java, where that tick data is actually processed (init and iteration methods seem to just setup a background process). So I'm left wondering how I can give the core encog neural-net a list of tick data that has a second or sub-second granularity? Hmmm Tim Washington Interruptsoftware.ca 416.843.9060 -- 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
Re: Why is a non-transient `into` faster than the built-in one?
I can get more consistent results when running the examples in Ubuntu.
On Monday, November 5, 2012 6:09:25 AM UTC+8, Marek Šrank wrote:
These are my results using (dotimes (time (dotimes ...))) combo to get
consistent results:
- on sets:
(dotimes [i 10] (time (dotimes [j 100] (into #{} (range 1e4)
Elapsed time: 388.595226 msecs
Elapsed time: 406.666801 msecs
Elapsed time: 421.559753 msecs
Elapsed time: 444.719263 msecs
Elapsed time: 431.319374 msecs
Elapsed time: 392.3779 msecs
Elapsed time: 392.382365 msecs
Elapsed time: 408.71734 msecs
Elapsed time: 444.203973 msecs
Elapsed time: 442.351363 msecs
(dotimes [i 10] (time (dotimes [j 100] (naive-into #{} (range 1e4)
Elapsed time: 1287.412806 msecs
Elapsed time: 1318.931199 msecs
Elapsed time: 1314.773064 msecs
Elapsed time: 1292.664029 msecs
Elapsed time: 1277.616099 msecs
Elapsed time: 1289.514678 msecs
Elapsed time: 1700.74875 msecs
Elapsed time: 1352.734662 msecs
Elapsed time: 1464.09882 msecs
Elapsed time: 1449.704738 msecs
- on vectors:
(dotimes [i 10] (time (dotimes [j 100] (into [] (range 1e4)
Elapsed time: 307.838501 msecs
Elapsed time: 243.426624 msecs
Elapsed time: 234.013566 msecs
Elapsed time: 247.711805 msecs
Elapsed time: 253.154264 msecs
Elapsed time: 284.375476 msecs
Elapsed time: 227.773865 msecs
Elapsed time: 247.807286 msecs
Elapsed time: 240.959477 msecs
Elapsed time: 230.627513 msecs
(dotimes [i 10] (time (dotimes [j 100] (naive-into [] (range 1e4)
Elapsed time: 406.55752 msecs
Elapsed time: 419.365134 msecs
Elapsed time: 413.544069 msecs
Elapsed time: 410.892756 msecs
Elapsed time: 394.827165 msecs
Elapsed time: 407.338251 msecs
Elapsed time: 441.60916 msecs
Elapsed time: 401.721826 msecs
Elapsed time: 412.7506 msecs
Elapsed time: 399.972445 msecs
Clojure 1.4.0
java version 1.6.0_26
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) Server VM (build 20.1-b02, mixed mode)
Cheers.
Marek.
On Sunday, November 4, 2012 3:41:14 AM UTC+1, Satoru Logic wrote:
Hi, all.
I am following an example demonstrating that `transient` can help
optimize mass updates to data structures:
First, a function is defined, which doesn't use transient collection:
(defn naive-into
[coll source]
(reduce conj coll source))
This is supposed to run slower than the built-in `into`, because, as the
book said, `into` uses transient collections whenever possible.
But the result shows up in my `repl` is just the reverse.
user= (time (do (into #{} (range 1e6)) nil))
Elapsed time: 4882.176 msecs
nil
user= (time (do (naive-into #{} (range 1e6)) nil))
Elapsed time: 3745.707 msecs
nil
What could be the reason of this?
--
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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
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Re: Playing with clojure-encog, Machine-Learning wrapper
That's just the thing - I'm not using the encog 3rd party library. I wrote *github.com/twashing/nn* completely from scratch. I did have the idea that maybe bid, ask and volume were not enough data with which to make reliable predictions. So I'll also try adding 3, 5, and 7 tick running averages as input. But for each lifecycle, the error seems to move up, then settle down at around 0.87, even for the next 1000 ticks or so. Something in my weight update calculations, pushes the error up to 0.87 (or some other locality), and keeps it there, even going for 1000 ticks. So first, i) I wanted to make sure my math was correct. Then ii) I wanted to ensure that I was correctly implementing the algorithm. error progression 1. *- 0.39489344469762966 ;; this error is a result of the initial randomized weights * 2. - 0.8491601535927018 3. - 0.8727499656138056 4. - 0.870064689195726 5. ... Wrt to using a single brokerage's market data vs aggregate tick data... aren't they one in the same? If we're both using the same exchange, I'd assume I was getting the same market data as any other brokerage (allowing for insiders, market makers, etc). I'd be interested in being educated otherwise. But in principle, this NN is just something that can be used to predict any time series - plant growth, sunspots, etc. So that error progression should still bother me, no? Hmm Tim Washington Interruptsoftware.ca *Today a young man on acid realized that all matter is merely energy condensed to a slow vibration, that we are all one consciousness experiencing itself subjectively, there is no such thing as death, life is only a dream, and we are the imagination of ourselves. Here's Tom with the Weather.* -- Bill Hicks On Sun, Nov 4, 2012 at 6:49 PM, Dominic Cerisano dceris...@gmail.comwrote: Well darn it. Had a detailed response ready to go and found that GG does not save drafts. POS. Movin on. The upshot was I tried predicting tick data (see attachment) with a model pretty much identical to the one given here with little real success. It would only resolve if I removed all of the discontinuities in the data - that came to over 20% of the data) The resulting fantasy set failed to predict trends that were not in the set with (15% success rate maximum) The conclusion I came to is that actual tick data (which is aggregate of all trading) is not predictable with the given model. NNs (certainly backprop) just try to spline a curve through a training set of input/ouput exemplars. Tick data simply does not seem to provide such a curve. Equivalent to stating what is obvious - stock markets are unpredictable from moment to moment). However one approach that occurred to me was rather than using aggregate tick data, rather use historical data from a given single brokerage that is known to use automated trading. Rather than trying to learn a dog-breakfast of influences given by aggregate data, non-aggregated direct data coming direct from a automated trading algo should prove to be a likely subject for machine-learning. However, if John Nash was correct then these systems would deliberately make bad trades in order to be less predictable. Can't do too much of that though :) There are plenty of examples in Java of backprop. It is well known, and since you are using a known library I doubt there are errors in it, other than sub-optimal coding. Historical FIX data (non-aggregated direct trading transactions) is generally not published anywhere. The model being explored here would be very useful if it were. Cheers! Dominic Cerisano On Sunday, August 5, 2012 2:27:35 PM UTC-4, frye wrote: Hey all, This post is a fork of a thread in the post community interest in machine learninghttps://groups.google.com/forum/?fromgroups#!topic/clojure/heBrnBuUGqs. Some of us were starting to take a deep dive into clojure-encoghttps://github.com/jimpil/clojure-encog and I thought it would be a good idea to have a new thread for that. So I took a look at the way encog-javahttps://github.com/encog/encog-java-core (what clojure-encog https://github.com/jimpil/clojure-encog** wraps) loads tick data into it's system. There is a YahooFinanceLoaderhttps://github.com/encog/encog-java-core/blob/master/src/main/java/org/encog/ml/data/market/loader/YahooFinanceLoader.javathat pulls csv data from a URL. But it assumes that prices only have a daily granularity. Now, the encog-java system seems to have the concept of granularity going down to the second (see herehttps://github.com/encog/encog-java-core/blob/master/src/main/java/org/encog/util/time/TimeUnit.java). But all of it's market loaders and list of ticks, seem to stop at a time granularity of daily. See the LoadedMarketData sourcehttps://github.com/encog/encog-java-core/blob/master/src/main/java/org/encog/ml/data/market/loader/LoadedMarketData.java, which uses a daily-biased
unseq
Say you are given a vector A=[a1 a2 a3 a4] by some function/library/Java call/whatever. You want to use A in some function F that expects the values a1 a2 a3 a4 but not in the form of A; for example (defn F [w x y z] (+ w x y z)). Is there some function G that you can use on A such that (F (G A)) would give the correct answer? I now know ways of getting around this, for example in the overly simple problem I gave above I would use (eval (cons F [1 2 3 4])). But I have came across problems where I have had to spend a large amount of time trying to figure out how to do this correctly. I would think that there could be something to act as G. Is there something like this? It would definitely simplify things from time to time. -- 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
lein-ritz Swank character coding
Hello, my current lein-ritz (0.5.0) setup, started with slime-connect, hangs when handling Unicode characters, e.g. user (def a \uD83D\uDE1F) ; UTF-16 representation of Unicode 4 WORRIED FACE #'clojure.core/a user a ? The REPL is hung at this point: in the the mini buffer I see error in process filter: Wrong type argument: listp, :write-string. I've done (setq slime-net-coding-system 'utf-8-unix) in my Emacs config, and used :jvm-opts [-Dswank.encoding=utf-8] in my Lein project, which changed something (slightly different error message), but still broken. I've also tried using :encoding on the lein command line, and looked into the ritz source, where it seems I'm doing the right thing. I'm stumped: any ideas? Cheers, Matthew. -- 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
