Thanks Jason,
I think some sort of priority queue may be the solution.
Thanks,
Sunil.
On Wed, Sep 14, 2011 at 12:39 AM, Jason Wolfe ja...@w01fe.com wrote:
There is java.util.PriorityQueue, which is heap-based:
http://download.oracle.com/javase/1,5.0/docs/api/java/util/PriorityQueue.html
Map is lazy so it only gets called when you need something from the sequence.
To force it to be called you use doall so it would be (doall (map
queue-copy-fetch fetches-seq)).
You only need the do sequence in queue-copy-fetch but not in process-indexes.
Matt Hoyt
Map returns a lazy sequence, the list of values is not realized yet,
you need to consume the lazy seq to obtain the values.
You should use (doseq [f fetches-seq] (queue-copy-fetch f))) if you have only
side effects to generate and do
not care about reusing the values returned by
You only need the do sequence in queue-copy-fetch but not in process-indexes
should be You only need the dosync in queue-copy-fetch but not in
process-indexes.
Matt Hoyt
From: Matt Hoyt mrho...@yahoo.com
To: clojure@googlegroups.com clojure@googlegroups.com
Nice. Thanks Peter. I use the n, p and v navigations now, but always want to
do that vim / Ctrl-d thing, lol. I figure I just need to spend some time
getting used to emacs' navigation idioms. It's going to take a lot of doing
to pull me away from vim habits.
Tim
On Wed, Sep 14, 2011 at 8:50 PM,
Hi everybody,
Thanks to Chouser's finger tree data structure, it makes it very simple to
keep some elements in a tree/sequence and efficiently maintain values by
some associative operation on all the elements of the collection .. I guess
chouser himself has given series of talks on that. However,
Hi,
we're getting totally OT here and should probably better head for
gnu.emacs.help. Anyway, just one more bark from me and then I'll be quiet
(but will respond to mail ;-)
On Thursday, September 15, 2011 2:08:28 AM UTC+2, frye wrote:
In Vim , you press *Ctrl-d* and *Ctrl-u* to go down and
Hi,
Is it a bug or I'm doing something wrong? I can't get rid of
auto-boxing in the second example, neither by type hinting nor by type
coercing of changed* locals.
(set! *warn-on-reflection* true)
This compiles fine:
(loop [x 1 changed 0]
(if (= x 10)
changed
(recur (inc x)
You can do one linear pass over your data, accumulating a sorted set of the
best 10 items you've found so far. You seed the sorted set with the first
10 items from your list, then continue traversing your list. With each new
item you encounter, you ask if it is any better than the worst of the
Does that work?
There is no guarantee that the top 10 of the overall list matches the top 10
of earlier prefixes, so the candidates that get discarded might be part of
the overall top 10, and the elements that pushed them out could just be
local maxima.
--
Dave
On 15 Sep 2011 08:23, Mark
If you maintain the invariant that at each point, your sorted set contains
the top 10 you've seen so far, then from that invariant you can conclude
that at the end of the traversal, your sorted set contains the top 10 for
the overall list.
On Thu, Sep 15, 2011 at 12:34 AM, David Powell
But when an element is dropped from the list, you're effectively resetting
its seen-count to zero. It might be seen again, and it might (if you hadn't
reset the seen-count), have ended up in the top 10.
Or have I misunderstood?
--
Dave
On 15 Sep 2011 08:54, Mark Engelberg
The initial problem statement is to figure out what would be the first 10
items if you sorted the list.
I don't see anything about frequency or how many times you've seen a given
item in the statement of the problem.
When I talk about a best item, I mean it is the first with regard to
whatever
Ah yeah. Sorry, I'd superimposed something I was thinking about on to the
original problem.
--
Dave
On 15 Sep 2011 09:07, Mark Engelberg mark.engelb...@gmail.com wrote:
The initial problem statement is to figure out what would be the first 10
items if you sorted the list.
I don't see
On Wednesday, September 14, 2011 11:19:13 AM UTC-4, Brian Hurt wrote:
Say I have two name spaces, A and B, with A depending on B. I want to test
namespace A, replacing module B with a mock B for testing purposes-
preferably without having to load B at all (B sucks in a bunch of stuff,
Thanks, Sam!
I'm really looking forward to play a bit more in depth with overtone
and try to use it in a jam session.
kind regards
--
__
Herwig Hochleitner
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Thanks Stuart and Dave.
On Sep 14, 10:30 am, Stuart Sierra the.stuart.sie...@gmail.com
wrote:
Hi Nick,
*out* and *err* are already dynamic, which is what allows `binding` to work.
You can the root binding of any Var (even non-dynamic Vars) with `def` or
`alter-var-root`.
-Stuart Sierra
Hi,
as you might know, the original version actually does run in fixed
stack space, thanks to lazy sequences.
(defn skl
[tree]
(map skl (filter seq? tree)))
loop .. recur is the moral equivalent of a while(true) loop in
imperative style. i.e. a slightly disguised (and somewhat more
Impressive, wonder if they were running this on a single node or more
widespread?
In a wide spread environment I think Erlang would be the true winner,
though it does not natively have macros :-(
There is an implementation of Lisp for Erlang called LFE (lisp
flavored Erlang) which I looked at,
I've been watching a bunch of Clojure videocasts lately, and there was one
which mentioned using the Java library SuperCSV. Unfortunately I can't
recall which videocast it was, can someone remind me please? Many thanks.
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Hello,
Is it somehow possible to monitor all namespaces for new defs or re-
defs (and defns etc). Generally, it it possible to implement some sort
of notification whenever something is added or updated to a namespace?
I don't mind even the solution is hacky or not very fast.
The reason I'm
I was about to say that you best bet would be redefining the relevant
functions/macros, when I realized that you cannot do that with def,
because it's a special form.
So short of patching clojure, I don't think one can monitor var
interning. (addition to a namespace)
What you can do, is
Hello,
I've written a small hack for the ClojureScript compiler that is useful for
working with static HTML projects. When invoked with the :watch option, the
cljsc program watches a source directory and recompiles sources whenever a
change is detected.
On Thu, Sep 15, 2011 at 8:56 AM, Herwig Hochleitner
hhochleit...@gmail.com wrote:
Hi,
as you might know, the original version actually does run in fixed
stack space, thanks to lazy sequences.
You are right!
Without testing it I had thought that the way recursion was used would
cause skl to
2011/9/15 Stathis Sideris side...@gmail.com
Hello,
Is it somehow possible to monitor all namespaces for new defs or re-
defs (and defns etc). Generally, it it possible to implement some sort
of notification whenever something is added or updated to a namespace?
Not that I'm aware of.
I
On Thu, Sep 15, 2011 at 8:56 AM, Herwig Hochleitner
hhochleit...@gmail.com wrote:
Consider
(defn find-in-tree
([tree pred?]
(concat
(filter pred? tree)
(mapcat find-in-tree (filter sequential? tree) (repeat pred?)
which of course is much simpler written as
(defn
On Thu, Sep 15, 2011 at 3:18 AM, Sergey Didenko sergey.dide...@gmail.comwrote:
Hi,
Is it a bug or I'm doing something wrong? I can't get rid of
auto-boxing in the second example, neither by type hinting nor by type
coercing of changed* locals.
(set! *warn-on-reflection* true)
This
On Wed, Sep 14, 2011 at 11:15 PM, cig clifford.goldb...@gmail.com wrote:
Impressive, wonder if they were running this on a single node or more
widespread?
We run an instance of the process on multiple nodes, configured
slightly differently. We needed some parallelization to improve
throughput
Great news! Looking forward to trying it out this afternoon.
Cheers,
Devin
On Sep 14, 2011, at 2:48 PM, Tom Hickey wrote:
Hi all,
With sign-off from Rich, I have pushed my defrecord work onto master.
Please try it out and let me know if you experience any issues.
Cheers,
Tom Hickey
M-{ and M-} in emacs go forward/backwards a paragraph. when in code,
this often translates well to moving around between
fragments/functions etc. you also have C-v and M-v for
forward/backward a page and then C-l for centering on the current
line. i use all of those a lot...
On Thu, Sep 15, 2011
On Thu, Sep 15, 2011 at 7:50 AM, David Nolen dnolen.li...@gmail.com wrote:
Loop itself will return boxed values I think.
Looks that way. The following code has no reflection warning:
(loop [x 1 changed 0]
(if (= x 10)
changed
(recur (inc x)
(long (loop [y 1 changed-y changed]
Native Erlang does have a macro facility, but it is not as powerful as
Lisp/Clojure's.
On Sep 15, 2:15 am, cig clifford.goldb...@gmail.com wrote:
[snip]
In a wide spread environment I think Erlang would be the true winner,
though it does not natively have macros :-(
[snip]
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On Thu, Sep 15, 2011 at 9:24 AM, Edward Garson egar...@gmail.com wrote:
Native Erlang does have a macro facility, but it is not as powerful as
Lisp/Clojure's.
lfe, baby, though of course that is not native erlang.
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Hi all --
Trying to basically do something like Integer.class -- but ...
user= (Integer/class)
user= java.lang.NoSuchFieldException: class (NO_SOURCE_FILE:2)
user= (Integer/getClass)
java.lang.NoSuchFieldException: getClass (NO_SOURCE_FILE:4)
Some (not so pretty) workarounds are
(.getClass
How about just Integer? :)
Clojure Integer
java.lang.Integer
Clojure (class Integer)
java.lang.Class
Dave
On Thu, Sep 15, 2011 at 1:31 PM, Andrew Xue and...@lumoslabs.com wrote:
Hi all --
Trying to basically do something like Integer.class -- but ...
user= (Integer/class)
user=
Any particular reason that records print differently than in Clojure? I also
see that records don't print w/ their namespace attached.
A related bug I encountered was that when I try to put the record literal
back into the REPL, Java complains about not being able to find the class.
David
On
Printing is not meant to be different. Maybe I was using against an
older version of Clojure when I was comparing output. Should be fixed
on master.
Thanks for the report.
Tom
On Sep 15, 4:00 pm, David Nolen dnolen.li...@gmail.com wrote:
Any particular reason that records print differently
Yes, this has been suggested in the past, and would enable all sorts of useful
tooling features.
The off-the-top-of-my-head solution (a priori of a proper statement of the
problem :-P would be for all namespaces (c.l.Namespace/namespaces) and each
namespace's aliases and mappings to be held in
On Thu, Sep 15, 2011 at 10:50 AM, David Nolen dnolen.li...@gmail.com wrote:
On Thu, Sep 15, 2011 at 3:18 AM, Sergey Didenko sergey.dide...@gmail.com
wrote:
Auto-boxing loop arg: change
(loop [x 1 changed 0]
(if (= x 10)
changed
(recur (inc x)
(loop [y 1 changed-y changed]
Thanks for clarifying the stack space issue. I got confused with the
original implementation, and was unsure it would run with a large sequence.
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To post to this group, send email to
On Tuesday, September 13, 2011 1:44:09 PM UTC-5, Sean Corfield wrote:
It was intended to be purely anecdotal but that doesn't seem to satisfy
anyone! :)
Homer: You know, when I was a boy, I really wanted a catcher's mitt, but my
dad wouldn't get it for me. So I held my breath until I passed
I ran into this exact issue on an alioth benchmark.
Adding the explicit (long ...) conversion gets rid of the reflection
warning, but didn't have a significant effect on performance.
The inner loop is still boxing the return value.
On Thursday, September 15, 2011 8:36:53 AM UTC-7, Sean Corfield
see
https://github.com/clojure/test.benchmark/blob/master/src/main/clojure/alioth/mandelbrot.clj#L49
There's two ways to get rid of the reflection warning:
1) another function, appropriately type hinted
2) explicit conversion to long
According to my measurements for this particular case, option
FWIW there's also cljs-watch:
http://github.com/ibdknox/cljs-watch
On Sep 15, 6:35 am, Stuart Campbell stu...@harto.org wrote:
Hello,
I've written a small hack for the ClojureScript compiler that is useful for
working with static HTML projects. When invoked with the :watch option, the
cljsc
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