>
> Have you actually looked at the data structure implementations in
> ClojureScript? The work is done. It's all protocols.
>
Hi David,
I just have. This is a nice work. There is a lot of repetitions though.
For example:
- IEquiv
(-equiv [coll other] (equiv-sequential coll other))
- IHash
On Mon, May 21, 2012 at 1:53 AM, nicolas.o...@gmail.com <
nicolas.o...@gmail.com> wrote:
> I just have. This is a nice work. There is a lot of repetitions though.
>
Thanks Nicolas for putting together these examples. This is exactly what
I've been talking about. Whenever someone talks about the
Symbolic computation sounds like a really great project!
For your specific problem of sorting the dependencies, you can do a
"topological sort" of the dependency graph of your equations in linear time
(given there are no cyclic dependencies, otherwise it would detect the
failure). There are st
Check the sample project.clj on Github:
https://github.com/technomancy/leiningen/blob/master/sample.project.clj
There's an entry for JVM options:
;; You can set JVM-level options here.
:jvm-opts ["-Xmx1g"]
In a quick test, that worked for me when lein repl was executed.
- Raju
--
You receiv
Oh, sorry, misunderstood your question. I found this blog post, maybe
this still works, although it's from 2010:
http://www.clojurepla.net/2010/05/increase-jvm-memory-when-using-swank.html
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To post to thi
That blog post is pretty outdated. When using leiningen, you can pass
arbitrary jvm opts via project.clj[1]:
:jvm-opts ["-Xmx1g"]
[1]: https://github.com/technomancy/leiningen/blob/master/sample.project.clj
On Mon, May 21, 2012 at 1:37 PM, Raju Bitter wrote:
> Oh, sorry, misunderstood your ques
> How do I set jvm options for a lein repl initiated independently of a
> project? In particular, I want the heap expansion that results from doing
> "M-x clojure-jack-in" in an emacs project.clj buffer with ":jvm-opts [
> "-Xms4G" "-Xmx4G"]" in its defproject form.
Larry is looking for a way to
You could add the following evinroment variable to your OS:
LEIN_JVM_OPTS=-Xms4G -Xmx4G
On Windows for example, you could add at the top of "lein.bat" file the
following line (under "@echo off"):
SET LEIN_JVM_OPTS=-Xms4G -Xmx4G
This should be enough to do the trick.
On Mon, May 21, 2012 at 6:51
On Mon, May 21, 2012 at 4:53 AM, nicolas.o...@gmail.com <
nicolas.o...@gmail.com> wrote:
> >
> > Have you actually looked at the data structure implementations in
> > ClojureScript? The work is done. It's all protocols.
> >
> Hi David,
>
> I just have. This is a nice work. There is a lot of repeti
On Monday, May 21, 2012 7:11:01 AM UTC-4, Martin Jul wrote:
>
> Symbolic computation sounds like a really great project!
>
> For your specific problem of sorting the dependencies, you can do a
> "topological sort" of the dependency graph of your equations in linear time
> (given there are no c
On Mon, May 21, 2012 at 4:53 AM, nicolas.o...@gmail.com <
nicolas.o...@gmail.com> wrote:
> > ClojureScript? The work is done. It's all protocols.
> >
> Hi David,
>
> I just have. This is a nice work. There is a lot of repetitions though.
> For example:
> - IEquiv
> (-equiv [coll other] (equiv-seq
On Mon, May 21, 2012 at 5:39 AM, Mark Engelberg wrote:
> On Mon, May 21, 2012 at 1:53 AM, nicolas.o...@gmail.com <
> nicolas.o...@gmail.com> wrote:
>
>> I just have. This is a nice work. There is a lot of repetitions though.
>>
>
> Thanks Nicolas for putting together these examples. This is exact
On Mon, May 21, 2012 at 5:39 AM, Mark Engelberg wrote:
> On Mon, May 21, 2012 at 1:53 AM, nicolas.o...@gmail.com <
> nicolas.o...@gmail.com> wrote:
> We need to figure out a way to make reusable partial implementations the
> norm. Maybe the solution is a Clojure construct along the lines of:
> (g
>
> And now any of those implementations can easily change at anytime without
> any external considerations. So what's the problem?
Well if you want to amend all of them at the same time, you have to
modify all of them.
On your advice of using extend-type: maybe I am wrong but I think it
has a pe
Actually, after working through the algorithm presented in the wiki, I
think my implementation is basically equivalent given the data structures
I'm using. :|
On Monday, May 21, 2012 9:27:01 AM UTC-4, Brent Millare wrote:
>
>
>
> On Monday, May 21, 2012 7:11:01 AM UTC-4, Martin Jul wrote:
>>
>>
On Mon, May 21, 2012 at 11:11 AM, nicolas.o...@gmail.com <
nicolas.o...@gmail.com> wrote:
> >
> > And now any of those implementations can easily change at anytime without
> > any external considerations. So what's the problem?
>
> Well if you want to amend all of them at the same time, you have t
Hi all,
I'm struggling with "when" code structures and my imperative mindset.
What is the better approach (or functional approach) to work with a code
like the below?
(defn parse-group [group-identifier line]
(when (= group-identifier "ID1")
(handle-id1 line))
(when (= group-identifier "
On May 21, 2012, at 10:54 AM, Christian Guimaraes wrote:
> I'm struggling with "when" code structures and my imperative mindset.
>
> What is the better approach (or functional approach) to work with a code like
> the below?
I think you're looking for cond (from memory, syntax might be wrong):
(
In this case I prefer either:
(cond (= group-identifier "ID1")
(handle-id1 line)
(= group-identifier "ID2")
(handle-id2 line)
(= group-identifier "ID3")
(handle-id3 line))
Or just use core.match:
(match [group-identifier]
["ID1"
I'm surprised no one went for condp
(defn parse-group [group-identifier line]
(condp = group-identifier
"ID1" (handle-id1 line)
"ID2" (handle-id2 line)
"ID3" (handle-id3 line)
(handle-unknown-id line)))
or something like that...
On Mon, May 21, 2012 at 11:59 AM, Timothy Baldri
On Mon, May 21, 2012 at 8:54 AM, Christian Guimaraes
wrote:
> What is the better approach (or functional approach) to work with a code
> like the below?
A simple translation to condp:
(defn parse-group [group-identifier line]
(condp = group-identifier
"ID1" (handle-id1 line)
"ID2" (han
On Monday, May 21, 2012 6:54:28 PM UTC+3, Christian Guimaraes wrote:
>
> Hi all,
>
> I'm struggling with "when" code structures and my imperative mindset.
>
> What is the better approach (or functional approach) to work with a code
> like the below?
>
> (defn parse-group [group-identifier line]
or simply use `case`
(case group-identifier
"ID1" (handle-id1 line)
"ID2" (handle-id2 line)
"ID3" (handle-id3 line))
2012/5/21 Timothy Baldridge
> In this case I prefer either:
>
> (cond (= group-identifier "ID1")
>(handle-id1 line)
> (= group-identifier "ID2")
Also there is an environment variable _JAVA_OPTIONS (note the leading
underscore) which is handled by the HotSpot JVM (OpenJDK or Oracle
JDK) and can be used with any java application.
--
Mikhail
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> A multimethod might also be an appropriate way forward for you.
+1 For multimethods, don't hardcode it if you don'tt have to.
Timothy
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On Mon, May 21, 2012 at 5:28 AM, Raju Bitter wrote:
>> How do I set jvm options for a lein repl initiated independently of a
>> project? In particular, I want the heap expansion that results from doing
>> "M-x clojure-jack-in" in an emacs project.clj buffer with ":jvm-opts [
>> "-Xms4G" "-Xmx4G"
The following is not about the merits of your request (or its foolishness :),
it maybe a
taste issue.
If I look at productivity/efficiency, I cannot see the interest of sticking to
the tools
and frameworks the majority is using presently. They are highly inefficients.
Doing things the same way
On Sun, May 20, 2012 at 2:37 PM, Bill Caputo wrote:
> I am not a clojure beginner (though far from feeling I know all there is to
> learn about it). I have been using clojure for almost a year; my team has
> rebuilt the central part of our system (which is relied on by just about
> every other
Wow, the discussion continued!
I agree on what most people have said: AND-combined and none of the
bindings available in the else.
On Friday, May 18, 2012 7:20:06 AM UTC+2, FrankS wrote:
>
> Christophe Grand was "experimenting" with some extensions to if-let and
> when-let that had implicit AN
On Wed, May 16, 2012 at 9:53 AM, Walter Tetzner <
robot.ninja.saus...@gmail.com> wrote:
> On Wednesday, May 16, 2012 9:16:29 AM UTC-4, Aaron Cohen wrote:
>>
>> Saying something is obvious and then using the word monad a paragraph
>> later is contradictory. ;)
>>
>> What should happen on the else b
> Same here--I can count on one hand the number of times I've wanted to
> implement polymorphism in three and a half years. Every time
> multimethods have worked great for the task. If you had polymorphism
> in a tight loop they might not suffice, but the decision to abandon
> multimethods should o
Hi,
I think that multimethods will fit better in my case, since I have more
than three ID's to handle.
Thank you all for the answers.
-- christian.
On Mon, May 21, 2012 at 5:04 PM, Timothy Baldridge wrote:
> > A multimethod might also be an appropriate way forward for you.
>
> +1 For multimeth
I guess it wouldn't hurt having them available in the else, even if people
won't use them often.
On Monday, May 21, 2012 7:11:05 PM UTC+2, Aaron Cohen wrote:
>
> On Wed, May 16, 2012 at 9:53 AM, Walter Tetzner <
> robot.ninja.saus...@gmail.com> wrote:
>
>> On Wednesday, May 16, 2012 9:16:29 AM UT
There's a few issues there, first of which is that the code doesn't
evaluate to what's shown:
REPL started; server listening on localhost port 21867
user=>
(if-let [a 1]
(if-let [b 2]
(if-let [c nil]
[a b c]
[a b c])
[a b c])
[a b c])
java.lang.Exception: Unabl
On Mon, May 21, 2012 at 1:43 PM, Jay Fields wrote:
> There's a few issues there, first of which is that the code doesn't
> evaluate to what's shown:
> REPL started; server listening on localhost port 21867
> user=>
> (if-let [a 1]
>(if-let [b 2]
> (if-let [c nil]
> [a b c]
>
On Mon, May 21, 2012 at 1:12 PM, nicolas.o...@gmail.com <
nicolas.o...@gmail.com> wrote:
> > Same here--I can count on one hand the number of times I've wanted to
> > implement polymorphism in three and a half years. Every time
> > multimethods have worked great for the task. If you had polymorphi
On Mon, May 21, 2012 at 10:12 AM, nicolas.o...@gmail.com <
nicolas.o...@gmail.com> wrote:
> The point is not whether deftype is useful or not. It is in the
> language so it must be useful, even it it is rarely.
> The point is whether it is an expressive construct or not.
> And it is not expressive
On Mon, May 21, 2012 at 1:59 PM, Mark Engelberg wrote:
> On the other hand, defrecord/deftype encourage you to write your protocol
> implementation in a way that cannot be reused unless you very specifically
> plan for it (factoring the protocol implementation into a separate map) and
> use a codi
On Mon, May 21, 2012 at 10:59 AM, Mark Engelberg
wrote:
> The whole beauty of protocols, for example, is that unlike interfaces, you
> can graft it on to a type that wasn't originally designed to support it.
> This is good, and a step forward from other languages.
i know protocols != structural t
On Mon, May 21, 2012 at 2:12 PM, Raoul Duke wrote:
> On Mon, May 21, 2012 at 10:59 AM, Mark Engelberg
> wrote:
> > The whole beauty of protocols, for example, is that unlike interfaces,
> you
> > can graft it on to a type that wasn't originally designed to support it.
> > This is good, and a ste
On Mon, May 21, 2012 at 11:14 AM, David Nolen wrote:
> How does duck typing support sensibly extending types you don't control?
ah, i missed the implicit part of the excerpt that was about extending
rather than just use. catching up.
thanks.
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You received this message because you are subscri
>> On the other hand, defrecord/deftype encourage you to write your protocol
>> implementation in a way that cannot be reused unless you very specifically
>> plan for it (factoring the protocol implementation into a separate map) and
>> use a coding style that (might?) be less efficient (i.e., addi
Sometimes it seems to me"OO" and "inheritance" have become some kind
of taboos. I don't believe OO is all that wrong. To me Clojure seems
to have good potential to harness the good part of OO without carrying
into the bad parts. So I am hoping. :-)
On May 21, 2:25 pm, "nicolas.o...@gmail.com"
wro
I should be switching over to Leiningen 2 shortly in any case, but I am
curious. How does one "set JVM_OPTS as an environment variable"?
--Larry
On 5/21/12 11:42 AM, Phil Hagelberg wrote:
On Mon, May 21, 2012 at 5:28 AM, Raju Bitter wrote:
How do I set jvm options for a lein repl initiated
On Mon, May 21, 2012 at 11:12 AM, David Nolen wrote:
> So "real world" complex systems avoid inheritance like the plague. So
> remind me again why it's desirable?
>
> David
>
>
>
I never said I want inheritance. I want convenient reuse of partial
implementations. Inheritance is one way to achiev
If you are running in a unix shell, something like
JVM_OPTS=-Xms4G ...
Followed by
export JVM_OPTS
Bash allows you to combine the two as in:
export JVM_OPTS-Xms4G ...
In a windows Cmd shell, something like this should work:
set JVM_OPTS=Xms4G ...
before running lein from the command line.
On Mon, May 21, 2012 at 6:08 PM, Mark Engelberg wrote:
> As I proposed in an earlier email, one brainstorm I have about this is:
>
> (get-protocol-implementation ) gives you
> back a mapping of the functions used by that type to implement that
> protocol.
>
I think there's some assumptions here
The bash example is
export JVM_OPTS=-Xms4G ...
missed the = ...
Luc
> If you are running in a unix shell, something like
>
> JVM_OPTS=-Xms4G ...
>
> Followed by
> export JVM_OPTS
>
> Bash allows you to combine the two as in:
>
> export JVM_OPTS-Xms4G ...
>
> In a windows Cmd shell, somethi
On Mon, May 21, 2012 at 6:08 PM, Mark Engelberg
wrote:
> I never said I want inheritance. I want convenient reuse of partial
> implementations. Inheritance is one way to achieve it, but I'd like to
> think that Clojure can find a better way.
We also have macros.
You can always make your own
On Mon, May 21, 2012 at 4:00 PM, David Nolen wrote:
> The only two protocols that involve specifying more than 2 fns is
> IWatchable (3) and MultiFn (5). It's not clear to me that they would
> benefit from partial specification.
>
I don't think there's enough body of code using protocols to real
On Mon, May 21, 2012 at 4:23 PM, kovas boguta wrote:
> On Mon, May 21, 2012 at 6:08 PM, Mark Engelberg
> wrote:
>
> > I never said I want inheritance. I want convenient reuse of partial
> > implementations. Inheritance is one way to achieve it, but I'd like to
> > think that Clojure can find a
I think it's misleading to use inheritance to reduce code duplication.
Inheritance is about indicating function typing and creating typed
contracts, both of which are fairly un-idiomatic in Clojure.
However, there is another way to prevent code duplication: use composition
instead. Instead of
Le 22 mai 2012 à 04:19, Mark Engelberg a écrit :
On Mon, May 21, 2012 at 4:00 PM, David Nolen wrote:
> The only two protocols that involve specifying more than 2 fns is
> IWatchable (3) and MultiFn (5). It's not clear to me that they would
> benefit from partial specification.
>
I don't think
Interesting demonstration, except for one thing, defining getters is a waste of
time :)
When you need to define accessors, you start to run into inefficient use of
your time. It still a bearable workload in Java because of all this heavy
tooling that allows
to select for which fields accessors wi
It took me a while to figure out how to put multiple entries into an
environment variable (that is, settings for both min and max heap sizes,
to wit, "export JVM_OPTS=\ -Xms4G\ -Xmx4G") but, once I did, Phil's and
Luc's suggestions have worked well and things have gone swimmingly. They
work for
Checkero finds common Clojure source code inside a set of directories. It
is primarily intended to study how Clojure learners write functions. As a
side effect, you can find if students have honestly completed their
homework. It could also be used to find commonly used patterns in code that
req
On May 22, 2012 7:09 AM, "Softaddicts" wrote:
> A better way would be something like:
>
> (defprotocol Personable
>(person [this])
> (age [this] )
>
> (defprotocol CensusOperators
>(age [this]))
>
> (extend-protocol Personable
>Person
>(person [this] this)
>Employee
>(p
Hi,
Am Dienstag, 22. Mai 2012 00:08:52 UTC+2 schrieb puzzler:
> Mergeable maps are a good idea, but the current way of doing things
> steers people away from that solution and requires too much
> forethought to actively plan for reuse.
I wonder why the current way of doing things “steers away” p
Hey Luc,
That's a cool casting strategy to cleanly build a standard way to get at
the person piece of any type of applicable record. In the pure composition
case, it's actually a nice solution to build functions know how to unpack
the Person aspect of a subtype.
However, I think which strateg
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