Christophe, one thing I've wondered about the design of clj-schema is
whether the schema is even the right place for determining looseness or
strictness. In some sense that is a property of the validation process.
It sometimes makes sense to use the same schema, but in some cases
validate it loos
Thanks, Alexander and Bronsa!
Shantanu
On Monday, 10 December 2012 21:13:37 UTC+5:30, Bronsa wrote:
>
> There's also https://github.com/fogus/bacwn
>
> 2012/12/10 Alexander Solovyov >
>
>> Hi,
>>
>> I don't think it's maintained somewhere (at least I haven't seen
>> anything), but at some point
2012/12/11 Alex Baranosky
> Christophe, one thing I've wondered about the design of clj-schema is
> whether the schema is even the right place for determining looseness or
> strictness. In some sense that is a property of the validation process.
> It sometimes makes sense to use the same schema
"nicolas.o...@gmail.com" writes:
> What happens if your run it a third time at the end? (The question
> is related to the fact that there appears to be transition states
> between monomorphic and megamorphic call sites, which might lead to
> an explanation.)
Same results, but your comment jog
Hi Laurent,
I've committed some refactoring that implements defschema in terms of
def-loose-schema. I also added a note to the readme explaining that
:clj-schema.schema/strict true metadata is required to make a schema strict.
As for the beginning part of your message, I have to mull the ideas o
On Tue, Dec 11, 2012 at 9:30 AM, Alex Baranosky <
alexander.barano...@gmail.com> wrote:
> Christophe, one thing I've wondered about the design of clj-schema is
> whether the schema is even the right place for determining looseness or
> strictness. In some sense that is a property of the validatio
To give the full story, I should add that atoms are very natural to use and
many concurrent use cases are covered by them alone. The combination of
atom and immutable vector/map goes a long way and they are also useful even
with mutable data, such as lazy-initialized singletons, resources that n
Mr. @athos0220 gave me a great help via twitter.
https://twitter.com/athos0220/status/278439357126418432 (in Japanese)
http://ideone.com/8mBm5N
https://gist.github.com/4255602
Now I can write macros without class files.
Thank you.
With regards,
Yoshinori Kohyama
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I found this (mis)feature quite annoying too. I think, we all shall ask the
language authors to fix it.
On Tuesday, December 11, 2012 10:44:34 AM UTC+4, Andy Fingerhut wrote:
>
> You can pass in a length 0 array of
> java.nio.file.attribute.FileAttribute's like so:
>
> (java.nio.file.Files/creat
I disagree...
One of the nice things about clojrue is that, at tis hear, lies the
'equiv' operator which is basically the 'egal' fn as defined by Baker
[1993] [Equal rights for functional objects or the mroe things change
the more they stay the same]. When using '=' with data-structures you
ar
From the docs:
Equality. Returns true if x equals y, false if not. Same as
Java x.equals(y) except it also works for nil, and compares
numbers and collections in a type-independent manner. Clojure's
immutable data
structures define equals() (and thus =) as a value,*not an identity*,
comparison
If you're looking for some truly unintuitive equality behavior check
this out:
user=> (def pred (Boolean. false)) ;;not a primitive but an object
#'user/pred
user=> (= pred false)
true
user=> (when pred (println "I really shouldn't print"))
I really shouldn't print
nil
Jim
On 11/12/12 13:19
Apologies...I did not realise this had already been answered... oops! :-)
On 11/12/12 13:32, Jim foo.bar wrote:
If you're looking for some truly unintuitive equality behavior check
this out:
user=> (def pred (Boolean. false)) ;;not a primitive but an object
#'user/pred
user=> (= pred false)
For more "surprising" behaviour:
(= #".*" #".*")
Sent from my iPhone
On 11 Dec 2012, at 13:32, "Jim foo.bar" wrote:
> If you're looking for some truly unintuitive equality behavior check this
> out:
>
> user=> (def pred (Boolean. false)) ;;not a primitive but an object
> #'user/pred
> use
I would take a look at MIT's Pyxis for help. The publications and work
sounds very similar to what you're shooting for:
http://web.mit.edu/newsoffice/2012/making-web-applications-more-efficient-0831.html
Paul
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Paul,
That is exactly what I was driving at, with a slight difference. Pryxis
takes an existing program with all the extra code and makes it faster. I
would like to build new applications, and I don't even want to build the
"extra" code to begin with. Naively speaking, a system that was built w
On Dec 11, 2012, at 4:37 AM, Marshall Bockrath-Vandegrift wrote:
> I’m not sure what the next steps are. Open a bug on the JVM? This is
> something one can attempt to circumvent on a case-by-case basis, but
> IHMO has significant negative implications for Clojure’s concurrency
> story.
I've gott
This is a good workaround—however, I still wish repl-utils/show was still
there. It was nice to always have it there instead doing this defn every
time I need it to explore a Java API.
On Sat, Feb 11, 2012 at 6:30 PM, Michał Marczyk wrote:
> On 11 February 2012 10:35, Ken Restivo wrote:
> > => (
I tried to run this using
git clone git://github.com/Yakulu/cyasus.git
lein deps
lein run
And got a failure with this exception:
Exception in thread "main" java.lang.ClassNotFoundException: cyasus.config,
compiling:(cyasus/common.clj:8)
Did you forget to check in a file? Also do you
Lee,
My reading of this thread is not quite as pessimistic as yours. Here is
my synthesis for the practical application developer in Clojure from
reading and re-reading all of the posts above. Marshall and Cameron, please
feel free to correct me if I screw anything up here royally. ;-)
When
Lee Spector writes:
> Is the following a fair characterization pending further developments?
>
> If you have a cons-intensive task then even if it can be divided into
> completely independent, long-running subtasks, there is currently no
> known way to get significant speedups by running the subt
Hi,
How do I create a vector of different refs?
I would like to have a vector with in each cell a ref so that I can
manipulate them independently from each other (Is that a good idea
anyway?). But when I do
(def x (into [] (repeat 10 (ref 100
I end up with the same ref ten times (not surp
(repeatedly 10 #(ref 100))
Ray.
On 11 December 2012 16:44, Thomas wrote:
> Hi,
>
> How do I create a vector of different refs?
>
> I would like to have a vector with in each cell a ref so that I can
> manipulate them independently from each other (Is that a good idea
> anyway?). But when I do
To answer your question:
(def x (into [] (map (fn [x] (ref 100))
(range 10
Or, instead of map & into, use mapv.
But yes, 90% of the time you are better served by putting the entire vector
in a single ref. Try using as little mutable state as possible, and you'll
o
On Dec 11, 2012, at 11:40 AM, Marshall Bockrath-Vandegrift wrote:
>
>> Or have I missed a currently-available work-around among the many
>> suggestions?
>
> You can specialize your application to avoid megamodal call sites in
> tight loops. If you are working with `Cons`-order sequences, just u
I had the same problem. I changed line 8 in common.clj as follows:
it was: (def params cyasus.config/params)
changed to: (def params cyasus-ring.config/params)
because it looked like the namespace in config.clj was "cyasus-ring" not
"cyasus". This worked for me, but I've only been using Cloju
I added some text to the macro "if" on ClojureDocs.org last time this issue was
discussed on the email list. It is a bit wordy, but does also mention that
this is something the Java docs themselves warn about.
http://clojuredocs.org/clojure_core/clojure.core/if
Andy
On Dec 11, 2012, at 5:38 A
There is a ticket filed for it, in case some contributor wants to update the
patches for it. It got intertwined with CLJ-445's patch, which hasn't been
updated in a while, so you might want to start fresh rather than untangle the
history there.
http://dev.clojure.org/jira/browse/CLJ-440
Andy
Lee Spector writes:
> If the application does lots of "list processing" but does so with a
> mix of Clojure list and sequence manipulation functions, then one
> would have to write private, list/cons-only versions of all of these
> things? That is -- overstating it a bit, to be sure, but perhaps
I am unsure whether you are writing about STM in general or in Clojure
specifically.
I worked for Gemstone Systems for five years on the object engine as well
as applications of the distributed, multi-user, garbage-collected STM that
is the centerpiece of Gemstone Smalltalk. During that time I
For a project I'm working on it would be awesome to have my tests
auto-rerun after every file change. I know lazy test exists, but it doesn't
work with Lein2 it seems.
In the past I've used speclj with lein speclj -a. But I'd rather not use
specs in this design, instead sticking with clojure's tes
another option:
https://github.com/jaycfields/expectations
&
https://github.com/jakemcc/lein-autoexpect
On Tue, Dec 11, 2012 at 12:38 PM, Timothy Baldridge
wrote:
> For a project I'm working on it would be awesome to have my tests auto-rerun
> after every file change. I know lazy test exists, bu
I am sorry for the dumb question, but zippers are for looping over nested
collections, yes? Why can't I just use get-in for that? When would I need a
zipper?
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Is there a list of features that you'd like to implement that core.logic
doesn't have yet?
On Tuesday, 11 December 2012 00:52:24 UTC-5, David Nolen wrote:
>
> core.logic is still pretty young - some (many?) Prolog niceties may not be
> present. Don't know until you try ;)
>
>
> On Tue, Dec 11, 2
On Dec 11, 2012, at 12:38 PM, Timothy Baldridge wrote:
> For a project I'm working on it would be awesome to have my tests auto-rerun
> after every file change. I know lazy test exists, but it doesn't work with
> Lein2 it seems.
(defproject ...
:profiles {:dev {:dependencies [[midje "1.4.0
On Dec 11, 2012, at 12:48 PM, larry google groups
wrote:
>
> I am sorry for the dumb question, but zippers are for looping over nested
> collections, yes? Why can't I just use get-in for that? When would I need a
> zipper?
If you want to "edit" trees, using zippers is often much much easier
I sort of got clojure interactively running and working with slime. I'd
like to interactively run and test in emacs, then push to heroku. Any
tutorials or pointers on how to do this?
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On Dec 11, 2012, at 1:04 PM, Brian Marick wrote:
> If you want to "edit" trees, using zippers is often much much easier than
> collection functions. I find the code easier to understand, too.
I almost forgot to make a shameless plug for /Functional Programming for the
Object-Oriented Programm
Hi Paul,
If it isn't too late to change your chapter title, I would encourage
emphasizing Clojure's model of references and values in general, and the
option of implementing a variety of different reference semantics that all
conform to the same basic API shape.
That general approach has been gam
Hi Paul,
Here is a real-world, production software example of the advantage of
values+refs over mutable objects and locks. A Datomic user reported the
following stack trace as a potential bug:
12:45:43.480 [qtp517338136-84] WARN c.v.a.s.p.e.UnknownExceptionHandler -
UnknownExceptionHandler: null
OK WOW. You hit the nail on the head. It's "reverse" being called in a pmap
that does it. When I redefine my own version of reverse (I totally cheated
and just stole this) like this:
(defn reverse-recursively [coll]
(loop [[r & more :as all] (seq coll)
acc '()]
(if all
(recur
And, interestingly enough, suddenly the AMD FX-8350 beats the Intel Core i7
3770K, when before it was very very much not so. So for some reason, this
bug was tickled more dramatically on AMD multicore processors than on Intel
ones.
On Tue, Dec 11, 2012 at 2:54 PM, Wm. Josiah Erikson wrote:
> OK W
Marshall:
I'm not practiced in recognizing megamorphic call sites, so I could be missing
some in the example code below, modified from Lee's original code. It doesn't
use reverse or conj, and as far as I can tell doesn't use PersistentList,
either, only Cons.
(defn burn-cons [size]
(let [si
I just downloaded the sample PDF for FP-OO, and it's delightful; I'll be
springing for a copy myself.
Russell
On Tue, Dec 11, 2012 at 11:14 AM, Brian Marick wrote:
>
> On Dec 11, 2012, at 1:04 PM, Brian Marick wrote:
> > If you want to "edit" trees, using zippers is often much much easier
> t
...and, suddenly, the high-core-count Opterons show us what we wanted and
hoped for. If I increase that range statement to 100 and run it on the
48-core node, it takes 50 seconds (before it took 50 minutes), while the
FX-8350 takes 3:31.89 and the 3770K takes 3:48.95. Thanks Marshall! I think
you m
Hm. Interesting. For the record, the exact code I'm running right now that
I'm seeing great parallelism with is this:
(defn reverse-recursively [coll]
(loop [[r & more :as all] (seq coll)
acc '()]
(if all
(recur more (cons r acc))
acc)))
(defn burn
([] (loop [i 0
Just curious, how did you immediately eliminate the possibility that the
reducing function was mutating the list that is being reduced? No
concurrency involved. In regular Java the 95% leading cause of CME is
precisely that.
Anyway, this applies to immutable structures per se, whether combined
I want to +1 what Stuart said. In my research on the subject, almost every
implementation of STM that allows for mutable-by-default data has ended up
as a miserable failure.
Specifically see the results from Microsoft's research:
http://www.infoq.com/news/2010/05/STM-Dropped
Clojure's implementat
i am trying to solve euler problem 125. when i tested this code:
(ns euler.Problem125)
(defn is-palindrome [n]
(let [s (str n)]
(= (seq s) (reverse s
(defn to-check []
(filter is-palindrome (range 1 1000)))
(defn square-root [n]
(Math/sqrt n))
(defn squared [n]
(* n n))
(defn
nth is called in doing the destructuring for the argument lists in
your fns defined in try-find-sequence.
On Tue, Dec 11, 2012 at 1:20 PM, Dennis Haupt wrote:
> i am trying to solve euler problem 125. when i tested this code:
>
> (ns euler.Problem125)
>
> (defn is-palindrome [n]
> (let [s (str
i just saw my error :/
Am 11.12.2012 22:22, schrieb Ben Wolfson:
> nth is called in doing the destructuring for the argument lists in
> your fns defined in try-find-sequence.
>
> On Tue, Dec 11, 2012 at 1:20 PM, Dennis Haupt wrote:
>> i am trying to solve euler problem 125. when i tested th
Is it possible to write a reducing function that mutates a list in Clojure?
Sure. But I think it is absurdly unlikely that it would happen by accident.
My 1% chance wasn't hedging against that case -- I was hedging against a
bug in reduce itself.
I don't really see even a 1% likelihood of either
There's not a list of features so much as a list of improvements I would
like to make. Some medium to big project ideas:
- CLP(Set)
- Improvements to tabling (currently a lot of redundant information is
recorded)
- Negation (based on CiaoProlog work)
- Environment Trimming (to make the Definite Cl
Brian,
Thanks! I bought and started reading your book. Seems excellent so far, and
wanted to say that I particularly appreciate your stated willingness to help
those of us with no experience in functional programming.
Nando
On Dec 11, 2012, at 20:14, Brian Marick wrote:
>
> On Dec 11, 2012
Oh and of course AND and OR parallelism.
On Tue, Dec 11, 2012 at 5:44 PM, David Nolen wrote:
> There's not a list of features so much as a list of improvements I would
> like to make. Some medium to big project ideas:
>
> - CLP(Set)
> - Improvements to tabling (currently a lot of redundant info
On Dec 11, 2012, at 4:45 PM, Nando wrote:
> Thanks! I bought and started reading your book. Seems excellent so far, and
> wanted to say that I particularly appreciate your stated willingness to help
> those of us with no experience in functional programming.
I'm pleased to hear that.
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On Tue, Dec 11, 2012 at 5:17 AM, Jim foo.bar wrote:
> I disagree...
> One of the nice things about clojrue is that, at tis hear, lies the 'equiv'
> operator which is basically the 'egal' fn as defined by Baker [1993] [Equal
> rights for functional objects or the mroe things change the more they st
one of the things which seem to be true but nowhere completely
successfully fleshed out is the fact that "equality" is very
subjective. there can and should be many different ways to pose and
answer the question "a == b".
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On Tue, Dec 11, 2012 at 11:07 AM, Jonathon McKitrick
wrote:
> I sort of got clojure interactively running and working with slime. I'd
> like to interactively run and test in emacs, then push to heroku. Any
> tutorials or pointers on how to do this?
For what it's worth direct socket access is un
On Tue, Dec 11, 2012 at 3:32 PM, Raoul Duke wrote:
> one of the things which seem to be true but nowhere completely
> successfully fleshed out is the fact that "equality" is very
> subjective. there can and should be many different ways to pose and
> answer the question "a == b".
There is a very
Hi,
Equality is never subjective. There maybe different equality relations
defined. In most cases (integer) one os well served by intuition.
In other cases (clojure's =) the definition may not be intuitive, but never
subjective.
On Dec 12, 2012 12:32 AM, "Raoul Duke" wrote:
> one of the things w
Great paper btw!
On Dec 12, 2012 12:42 AM, "Phil Hagelberg" wrote:
> On Tue, Dec 11, 2012 at 3:32 PM, Raoul Duke wrote:
> > one of the things which seem to be true but nowhere completely
> > successfully fleshed out is the fact that "equality" is very
> > subjective. there can and should be many
> Equality is never subjective. There maybe different equality relations
> defined. In most cases (integer) one os well served by intuition.
> In other cases (clojure's =) the definition may not be intuitive, but never
> subjective.
ok sheesh then ^subjective^context dependent
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On Dec 11, 2012, at 5:42 PM, Phil Hagelberg wrote:
> Henry Baker's "Equal Rights for Functional Objects" paper:
> http://home.pipeline.com/~hbaker1/ObjectIdentity.html
Henry Baker was/is a brilliantly just-outside-of-the-box thinker. Many of the
papers at http://home.pipeline.com/~hbaker1 are
On Dec 11, 2012, at 1:06 PM, Marshall Bockrath-Vandegrift wrote:
> So I think if you replace your calls to `reverse` and any `conj` loops
> you have in your own code, you should see a perfectly reasonable
> speedup.
Tantalizing, but on investigation I see that our real application actually does
Well, I've used slime with SBCL for quite a while, but this is my first
foray into clojure and heroku. Are you basically saying the best approach
is just to edit locally, push to heroku, and run? There's really no way to
have a similar environment set up locally that runs as well? I haven't
Thanks. I can't think of a feature at the moment. I'm just trying to
decide between the two. I'm working on a rule engine/DSL for game AI and
I'm trying to make a decision... but I still haven't worked out all the
requirements.
On Tuesday, 11 December 2012 17:45:40 UTC-5, David Nolen wrote:
On Tue, Dec 11, 2012 at 6:55 PM, Jonathon McKitrick
wrote:
> Well, I've used slime with SBCL for quite a while, but this is my first
> foray into clojure and heroku. Are you basically saying the best approach
> is just to edit locally, push to heroku, and run?
I suppose if you ensure everything
Yes, upon second thought I saw exactly what you mean.
I think you make an important point: when talking about the STM we need to
look at the wider picture. Where a mutable-by-default language needs the
STM, Clojure gets by with just atoms because a single swap! call can do any
number of mutati
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