Here's an example:
http://www.bagdemir.com/2013/07/30/implementing-relational-algebra-in-clojure/
On 13 February 2014 18:32, David Jagoe wrote:
> Would this work for you?
>
> http://clojure.github.io/clojure/clojure.set-api.html
>
> (in particular select for your example)
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On 6 February 2013 14:40, Phil Hagelberg wrote:
>
> You can use an uberjar without AOT; just use something like this:
>
> $ java -cp my-uberjar.jar clojure.main -m my.namespace 8080
>
Excellent, thanks.
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t; I get "respawning too
fast" from upstart.
Any ideas on how to do this?
Thanks,
David
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I hope that helps!
>
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to do with the fact that match itself is a macro?
Is there some other way that I could extend match to only match when the
variable is not nil?
Thanks,
David
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(format "AND t.date >= '%s'::timestamp" from)
(format "AND t.date < '%s'::timestamp" to))
:else (throw (Exception. "Illegal combination")
(defn drilling-aggregates [&
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On 21 April 2012 14:41, Dan Cross wrote:
> On Sat, Apr 21, 2012 at 6:20 AM, David Jagoe wrote:
> > Can anybody tell me whether wkhtmltopdf or flying-saucer deal with
> > pagination properly? I've been templating TeX to get properly laid out
> > tables broken over mul
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On 20 April 2012 07:38, Mark Engelberg wrote:
> On Thu, Apr 19, 2012 at 11:31 PM, David Jagoe wrote:
>
>>
>> Out of curiosity, why is this useful to you?
>>
>
> It certainly has performance benefits.
>
> When things are tested for equality (e.g., to test agai
agine that the fact that it works like that for maps at the
moment is an implementation detail that you shouldn't rely upon.
dissoc[iate]. Returns a new map of the same (hashed/sorted) type,
that does not contain a mapping for key(s).
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> On Thursday, April 19, 2012 3:11:02 AM UTC-5, David Jagoe wrote:
>>
>> Hi all,
>>
>> Does anyone know whether I can run ClojureCLR on .net compact?
>> Specifically I would need to run it on Windows CE. Currently the
>> application is written in C# which work
ns are welcome.
>
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Hi all,
Does anyone know whether I can run ClojureCLR on .net compact?
Specifically I would need to run it on Windows CE. Currently the
application is written in C# which works ok, but I need to rewrite it
and I'm deciding between C#, F# and ClojureCLR.
Thanks,
David
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gt; On Apr 4, 6:50 am, David Jagoe wrote:
>> Particularly I very often find myself doing
>>
>> (apply hash-map (flatten (for [[k v] some-map] ...)))
>
> :( :( :( flatten is vile, never use it[1]. What if the value in the
> map is a list, or the key is a vector? Now yo
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k (apply (agg k) vs)])
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Thank you all for your feedback. I will certainly post in local user
groups and Functional Jobs + Linked In are my next stops.
Cheers,
David
On 30 March 2012 21:49, blcooley wrote:
>
>
> On Mar 30, 7:35 am, David Jagoe wrote:
>> G'day everyone
>>
>> I am inc
are
making fuzzy decisions in place of human operators.
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G'day everyone
I am increasingly relying on clojure and plan to use clojureclr and
clojurescript in production too. I will soon need to hire a clojure
developer and was hoping that someone could suggest a good place to post a
job ad. I've never seen a job posted here but I would like to reach the
On 29 March 2012 21:41, Cedric Greevey wrote:
>
> On Thu, Mar 29, 2012 at 4:18 PM, David Jagoe wrote:
> > Given a sequence like this: [1 2 1 2 1 1 2 1 2 2 2]
> >
> > partition it to get this: [(1 2) (1 2) (1) (1 2) (1 2) (2) (2)]
> >!
>
> (defn partition-
want to be able to deal with more than 2 distinct
values.
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d. I've done a lot of advanced Python programming so unlike
Java I understand the language well. I'll start by getting my head
around the code.
Cheers!
David
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On 19 August 2011 17:25, Herwig Hochleitner wrote:
> This is a bug in `rename`.
> That needs to be worked on, thanks for pointing it out.
> In the meantime, please use
> (-> (table nil :users)
> (project [[:id :as :idx]
> :name])
> to-sql)
> in the meantime.
Hi All,
Could someone with experience in clojureql + postgres tell me if this works:
clojureql.core> (-> (table nil :users)
(project [:id :name])
(rename {:id :idx})
to-sql)
"SELECT users.id,users.name FROM users A
Thank you for making this available!
On 10 August 2011 02:53, Filip de Waard wrote:
> I'm working on Vix, which is a document repository and content
> management system written in Clojure with a CouchDB backend. After the
> announcement on July 23 I immediately got excited about ClojureScript
> a
rotocols on the other hand doesn't define functions 'inside' the object,
> they are simply standard functions.
>
> Jonathan
>
> On Sun, Jul 10, 2011 at 1:15 PM, David Jagoe wrote:
>>
>> Thanks for your response Devin.
>>
>> I guess I had come t
> On Jul 8, 2011, at 5:14 PM, Kevin Downey wrote:
>
>> if only lisp had macros
>>
>> On Fri, Jul 8, 2011 at 12:16 PM, David Jagoe wrote:
>>> Hi All,
>>>
>>> I am battling with how to deal with the difference between Protocols
>>> and
Hi All,
I am battling with how to deal with the difference between Protocols
and Interfaces in a particular case.
Consider the following code:
(defrecord DomainTypeA []
SomeInternalProtocol
(foo [this] "foo result")
clojure.lang.IFn
(invoke [this] "invoke result"))
This code works fine
Well I like the name!
On 2 June 2011 06:21, Andreas Kostler wrote:
> Hi All,
>
> Stout is a porter stemmer implemention using a snowball-like syntax for
> defining rules.
> Rules are of the form {:c? condition :s1 "abc" :s2 "efg" :a action}
> reading if condition is met, replace s1 with s2 and e
Hey Miki,
On 31 May 2011 17:52, Miki wrote:
> Just uploaded fs 0.8.0 to clojars with your changes. Thanks!
I'm glad to contribute something and I'll be glad to remove some code
from my project!
> (I've changed the assert in your code to :pre checks)
Ah yes that sounds better.
Cheers,
David
On 29 May 2011 16:40, Miki wrote:
>
>> Cool, I'll clean up the code and submit it along with tests and docs.
>> While Im about it i may as well write the equivalent macro for tempfile.
I've submitted a bit bucket pull request with the changes. Never used
bit bucket before so not sure what the pro
Cool, I'll clean up the code and submit it along with tests and docs. While
Im about it i may as well write the equivalent macro for tempfile.
Cheers
David
On 27 May 2011 5:52 PM, "Miki" wrote:
I've opened https://bitbucket.org/tebeka/fs/issue/5/with-tempdir-macro and
will try to get to it soon
G'day all,
Thanks Miki for fs, also coming from a Python background I am enjoying
the familiarity!
The thing that I most often use tempdir for is unit testing where I
want to clean up immediately in a finally block.
(defmacro with-tempdir
"bindings => [name path]
Evaluates body in a try ex
Are you in Nigeria?
Anyone else on this list in Africa?
On Sunday, 22 May 2011, Emeka wrote:
> Okay.
> I live in Africa... maybe we should have online meetups for now.
> Emeka
>
> On Thu, May 19, 2011 at 4:29 PM, David Jagoe wrote:
> On 18 May 2011 18:54, Emeka wrote:
&
On 18 May 2011 18:54, Emeka wrote:
> David,
> How is Clojure doing in Africa?
There really aren't that many people using it among the people that I
have spoken to. I've worked in the UK, Europe and the US and in
comparison South Africa is a little bit behind and quite conservative
when it comes t
would be great. There aren't too many Clojure developers in South Africa!!
>
> Zach
>
> On May 10, 1:07 pm, David Jagoe wrote:
>> G'day everyone,
>>
>> Forgive me if this is not the appropriate place for this message, but
>> I'm in San Fran
G'day everyone,
Forgive me if this is not the appropriate place for this message, but
I'm in San Francisco for a few days from Johannesburg, South Africa.
Any clojure users keen on meeting up? Any clojure events going on that
I haven't spotted on-line?
I run a business using Clojure for web devel
Hey Stuart,
On 4 May 2011 00:19, Stuart Sierra wrote:
> No. Clojure template (which I wrote) is a backwards way of doing macros. It
> happens to be useful in clojure.test, but nowhere else.
Thanks that's good to know. While we're on the subject, I'm curious
about cc.apply-macro. Why should it no
Thanks for the responses.
On 3 May 2011 17:39, Steve Miner wrote:
>
> On May 3, 2011, at 7:08 AM, David Jagoe wrote:
>
> For your specific purpose, I would be careful about using a map as an
> "entity" specification. If the order is significant, a vector of field
>
Hey everyone,
I'm busy implementing a macro whose usage looks like this:
(defentity Person
{:name {:type String :validator name-validator}
:id-number {:type String :validator id-number-validator}
:height{:type Float :default 0.0}
:weight{:type Float :default 0.0}
:bmi
Hi Ken,
> Shoundn't be too hard. Something like
[snip]
Thanks, looks good. I haven't had a chance to play with the code yet
but it looks like a very good start.
>
> You probably want it to omit bmi from the argument lists and compute
> it -- that will complicate things, something like:
>
[snip
On 2 May 2011 14:06, craig worrall wrote:
>
>
> On May 2, 8:37 pm, David Jagoe wrote:
>>
>> (i) Is it possible to generate the (defrecord Person ...) from the
>> person-entity hash-map that I have shown?
>
> Sure. You may want to have a look at https://gist.gi
Hi Everyone,
Background to my problem:
I am developing a compojure application, and there is lots of
duplication in listing field names in my current data model:
(i) in the defstruct
(ii) in the public constructor's argument list
(iii) in the hiccup form fields
(iv) in the compojure argument des
Hey Paul,
On 30 April 2011 20:27, Paul deGrandis wrote:
> I'm not exactly sure of your specific use case, but you should take a
> look at clojure.template. It could be what you're looking for.
>
> http://clojuredocs.org/clojure_core/clojure.template
Great, I will have a look thanks.
--
You re
ords.
> Of course there are downsides to this (speed, lack of types) but it can be a
> useful strategy.
> Thanks,
> Ambrose
> On Sat, Apr 30, 2011 at 4:46 PM, David Jagoe wrote:
>>
>> G'day everyone,
>>
>> Are there any libraries or projects that are
G'day everyone,
Are there any libraries or projects that are similar to Python Traits
or Zope Schemas (http://pypi.python.org/pypi/zope.schema) for clojure.
I am developing a compojure application and there is a lot of
duplication between areas of the codebase, e.g.
- Fields listed on the defreco
On 26 April 2011 13:27, Meikel Brandmeyer wrote:
> Hi,
>
> clojure supports keyword arguments for a quote some time now.
>
> (defn foo
> [positional1 ... positionalN & {:keys [kw1 ... kwn]}]
> ...)
>
> The syntax is the usual destructuring syntax for maps. So you can specify
> defaults via :or
G'day folks,
I've recently started using defnk more widely, and just run into the
fact that pre and post conditions won't work. I understand that this
is because they are a clojure special form and therefore cannot be
supported by the macro - is that right? Is there any way to work
around that? Ha
Jules,
I ran into a problem implementing a Clojure CLR http client for a
Clojure web server. I can't remember the details off-hand but I recall
that it had something to do with a static global variable in some .NET
http client library and SSL certificate handling. It wasn't a problem
with ClojureC
Have a look at leiningen. Its a build tool that manages your project
environment, allows you to compile your code to a jar etc.
http://www.assembla.com/wiki/show/clojure/Getting_Started_with_Leiningen
https://github.com/technomancy/leiningen/blob/master/TUTORIAL.md
lein run -m org.you.main
will
Hey Daniel,
> You can use a macro to make the add-to-hook take the function symbol so
> it looks more like adding the function instead of having to do all of
> the #'fn syntax.
Thanks, I think that's the answer I was looking for.
Cheers,
David
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Hey Phil,
On 22 February 2011 06:48, Phil Hagelberg wrote:
>
> https://github.com/technomancy/robert-hooke
Thanks, I'll have a look!
Cheers,
David
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Hi Meikel,
On 21 February 2011 15:18, Meikel Brandmeyer wrote:
> Hi,
>
> Is there a reason, not to use the function object directly?
Just that I wanted to prevent adding the same function multiple times.
But it was just for testing convenience, and perhaps over-complicating
things a bit.
>
> (d
G'day all,
Is it considered unusual to pass a var into a function? My use-case is
as follows: I want code to be able to register a function on a hook
(kinda like emacs). Each of the registered functions should be called
once on a particular well-defined event. I want the process of
registering a p
Hi James,
On 5 January 2011 18:50, James Reeves wrote:
> Ring enhancement and patches are best posted to the "ring-clojure"
> group. There's a chance they might be missed if only posted to the
> Clojure group.
Ok, will do that in future.
>
> Regarding wrap-reload, your enhancements would put it
G'day,
Ring ships with some development middleware that reloads the supplied
namespaces every request. This is fantastic for quick iterative
development, particularly because the JVM takes so long to start.
However as soon as you have more than a few namespaces every request
becomes rather slow -
On 24 November 2010 02:11, JMatt wrote:
> The easiest way to prevent divergence is to write and use native
> clojure libraries.
I totally agree. However because of clojure's excellent interop
capabilities it is extremely common (in fact encouraged) for
developers to directly use Java code. For ex
G'day all,
I am using ClojureCLR (thanks everyone involved, clojure makes me
happy!) to develop a Windows application. I need a json library (and
don't really want to directly use the native C# one) so it seems like
the best option will be to port an existing Clojure library to the
CLR. Basically
Hi All,
Is this the right place for ClojureCLR-specific questions?
I have managed to install and use ClojureCLR on Windows but before I
head too far down that track I'd like to canvas some expert opinion:
Is it going to be painful trying to implement a Windows Service in ClojureCLR?
Basically,
On 26 October 2010 04:36, Mark Engelberg wrote:
> When I do restart-inferior-lisp, it says, "no inferior lisp process".
Yeah, that'll only work if you originally started swank from emacs as
the inferior lisp process. If you're doing 'lein swank' on the command
line it won't work - looks like elei
Looks like its already done:
https://www.assembla.com/spaces/clojure/tickets/103-gc-issue-99--incorrect-error-with-if-let
On 20 October 2010 22:20, David Jagoe wrote:
> Hi all,
>
> I noticed today (clojure 1.2) that using if-let incorrectly thusly:
>
> (if-let [a 1]
> (printl
Hi all,
I noticed today (clojure 1.2) that using if-let incorrectly thusly:
(if-let [a 1]
(println "1")
(println "2")
(println "3"))
Instead of e.g.
(if-let [a 1]
(println "1")
(do
(println "2")
(println "3")))
Results in this error
if-let requires a vector for its binding
Hey Luc,
Are you deploying to Tomcat using a war file? Are you perhaps missing
the :web-content key in your project.clj file (I presume you're using
Leiningen + leiningen-war)
(defproject myproject "0.0.1"
:description ""
:dependencies [[org.clojure/clojure "1.2.0"]
Thanks chaps, that's what I was looking for.
Luckily I came across an easier solution to the underlying problem
(i.e. using session and reload middleware in ring):
http://groups.google.com/group/ring-clojure/browse_thread/thread/a0dffa86be0896ff#
basically, using defonce allows me to create memor
Hi all,
Anyone know of a utility that returns a absolute filename given a
namespace symbol? Actually what I'm trying to do is adjust
ring.middleware.reload to only reload source files if they've changed
(otherwise I run into problems with session management), so if anyone
knows of utilities that a
On 25 August 2010 20:16, Alan wrote:
> I have the same problem, but you can usually figure that out by
> looking at the function to which the backtrace refers, as well as the
> filename:
>
> 4: clojure.lang.RT.nth(RT.java:722)
> 5: ddsolve.core$play_deal_strategically.invoke(core.clj:177)
> 6:
Ahoy,
On 25 August 2010 16:06, Glen Rubin wrote:
> After toying around at the REPL I realize that I have been working
> with a heretofore invalid understanding of collections. For example,
> working with the following collection(s):
>
> signal:
> (((1 2 3 4) (2 3 4 5) (3 4 5 6)) ((3 4 5 6) (4 5
Ahoy,
On 25 August 2010 15:46, Stuart Halloway wrote:
>
> *Specific* documentation of pain points also welcome.
In general I haven't found the stack traces to be too much of a
problem, but the lack of full paths in the trace has bitten me. Since
all of my namespaces have a core.clj this can mean
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