The field names and order in the constructor will always match the
values specified in deftype (excepting certain character issues, such
as turning a dash into an underscore).
Introspecting is easy enough:
user=> (deftype foo [bar baz])
user.foo
user=> (map #(.getName %) (.getDeclaredFields foo))
I wrote up a quick post on my experience with using Apache Camel from
Clojure. For anyone who's interested, you can find it at
http://codeabout.blogspot.com/2010/06/using-apache-camel-from-clojure.html
Thanks,
~J
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Hi
Is there a way to introspect types defined with deftype and
defrecord? I'd just like to know the field names and their order in
the constructor. Java reflection works fine but requires some
fiddling around to filter the static fields and __meta and __extmap.
It feels like something that someo
Hi,
Am 07.06.2010 um 21:20 schrieb Brian Troutwine:
> Why does this work?
>> change [org.clojure/swank-clojure "1.2.1"] => [swank-clojure "1.2.1"]
Each dependency has a group and an artifact name. org.clojure/swank-clojure
means group "org.clojure" and artifact "swank-clojure". swank-clojure is
Personally, I thinks it would be much more elegant to have a direct
notation. It could be argued that the Ratio type could also be
implemented without a special Ratio type, but where's the fun in that?
Consider:
(* 3.4+7i 15i)
vs
(complex-multiply (construct-complex 3.4 7) (construct-complex 0
Interesting, that works perfectly. Thanks!
Why does this work?
On Mon, Jun 7, 2010 at 12:16 PM, patrik karlin wrote:
> Hey Brian
>
> change [org.clojure/swank-clojure "1.2.1"] => [swank-clojure "1.2.1"]
>
>
> 2010/6/7 Brian Troutwine :
>> Hello all,
>>
>> I have the following in project.clj in m
Hey Brian
change [org.clojure/swank-clojure "1.2.1"] => [swank-clojure "1.2.1"]
2010/6/7 Brian Troutwine :
> Hello all,
>
> I have the following in project.clj in my newly lein generated project:
>
>
> (defproject void "1.0.0"
> :description "A toy."
> :dependencies [[org.clojure/clojure "1.1.
Hello all,
I have the following in project.clj in my newly lein generated project:
(defproject void "1.0.0"
:description "A toy."
:dependencies [[org.clojure/clojure "1.1.0"]
[org.clojure/clojure-contrib "1.1.0"]]
:dev-dependencies [[org.clojure/swank-clojure "1.2.1"]])
R
On 7 June 2010 16:50, .Bill Smith wrote:
> To complete the thought,
>
> user=> (Character/isLetter \x)
> true
> user=> (Character/isLetter (.charAt "x" 0))
> true
or:
user=> (first "x")
\x
user=> (Character/isLetter (first "x"))
true
> On Jun 7, 6:17 am, Moritz Ulrich wrote:
>> isLetter accept
Yes, but in (some versions of) Scheme, (sqrt -1) yields i.
Representing complex numbers and just doing math between two complex
numbers is not the problem. Retrofitting Clojure math so that all
operations work on the entire numeric tower, allowing you to
seamlessly manipulate complex and non-comp
I think the right place for this is Maven, Ant, Leiningen, and command
line. It's a generic thing for any build system. :-) Generating
correct stubs is the common part, and then there is an integration
into each system. I'm most interested in having this for Maven, but
there's really not much t
On Jun 7, 6:37 am, toddg wrote:
> I'm attempting to read and understand core.clj, and I'm walking
> through methods as I run into them, trying to understand them, line by
> line. I' mostly understand read-lines (w/ the exception of the last
> line), but I do not follow lazy-seq or if-let. Could so
On 7 June 2010 16:35, Phil Hagelberg wrote:
> On Mon, Jun 7, 2010 at 5:41 AM, Rick Moynihan wrote:
>> I've just updated slime to 20100404 in ELPA, and I've noticed that tab
>> completion in the REPL buffer has stopped working.
>>
>> Pressing TAB to complete a symbol prints "No dynamic expansion f
On Mon, Jun 7, 2010 at 5:41 AM, Rick Moynihan wrote:
> I've just updated slime to 20100404 in ELPA, and I've noticed that tab
> completion in the REPL buffer has stopped working.
>
> Pressing TAB to complete a symbol prints "No dynamic expansion for
> `user> foo' found. Any ideas how to get this
Melkel,
On Mon, Jun 7, 2010 at 15:55, Meikel Brandmeyer wrote:
> Hi,
>
> On Jun 7, 4:25 pm, Bruce Durling wrote:
>
>> I have no problem with calling seq, I just don't understand why I need to.
>
> Because the initial collections might be empty.
>
> (my-zipmap [] []) => {}
I see, where as the ve
On Jun 7, 1:49 pm, Bruce Durling wrote:
> Steve and Jon,
>
> On Mon, Jun 7, 2010 at 12:43, Steve Purcell wrote:
> > Empty seqs are logically true, so your "if" condition is always true.
>
> I was looking at that today too. I did (> 0 (count my-list)) in my if
> statement to fix it.
Be aware that
Hi,
On Jun 7, 4:25 pm, Bruce Durling wrote:
> I have no problem with calling seq, I just don't understand why I need to.
Because the initial collections might be empty.
(my-zipmap [] []) => {}
Sincerely
Meikel
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To complete the thought,
user=> (Character/isLetter \x)
true
user=> (Character/isLetter (.charAt "x" 0))
true
On Jun 7, 6:17 am, Moritz Ulrich wrote:
> isLetter accepts single characters, you gave it a string with a length of one.
> The error is caused by reflection when clojure searches for a f
Patrik,
On Mon, Jun 7, 2010 at 13:00, patrik karlin wrote:
> calling rest dosent give you nil it gives you an empty seq
> so the if statment never fails
>
> try
>
> (defn my-zipmap [keys vals]
> (loop [my-map {}
> [kf & kr] (seq keys)
> [vf & vr] (seq vals)]
> (if (and kf vf)
>
With the usual apologies to those who receive multiple copies of
this...
~~~
International Lisp Conference 2010
October 19-21, 2010
John Ascuaga's Nugget (Casino)
I've just updated slime to 20100404 in ELPA, and I've noticed that tab
completion in the REPL buffer has stopped working.
Pressing TAB to complete a symbol prints "No dynamic expansion for
`user> foo' found. Any ideas how to get this working again?
R.
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Stu,
On Mon, Jun 7, 2010 at 13:08, Stuart Halloway wrote:
> That doc page used pre-1.0 Clojure code, which, as you saw, doesn't work.
> Thanks for the catch, I have fixed the docs on the site.
Thanks. I think my mistake was mixing up rest (which always returns a
sequence even if empty) and next
Hi Bruce,
That doc page used pre-1.0 Clojure code, which, as you saw, doesn't work.
Thanks for the catch, I have fixed the docs on the site.
Stu
> Steve and Jon,
>
> On Mon, Jun 7, 2010 at 12:43, Steve Purcell wrote:
>> Empty seqs are logically true, so your "if" condition is always true.
>>
So its the calling of first that gives you nil
here is some example code
user=> (rest '(2))
()
user=> (rest '())
()
user=> (first '())
nil
2010/6/7 patrik karlin :
> calling rest dosent give you nil it gives you an empty seq
> so the if statment never fails
>
> try
>
> (defn my-zipmap [keys val
calling rest dosent give you nil it gives you an empty seq
so the if statment never fails
try
(defn my-zipmap [keys vals]
(loop [my-map {}
[kf & kr] (seq keys)
[vf & vr] (seq vals)]
(if (and kf vf)
(recur (assoc my-map kf vf) kr vr)
my-map)))
2010/6/6 Jon Seltzer
Steve,
On Mon, Jun 7, 2010 at 12:48, Steve Purcell wrote:
> On 7 Jun 2010, at 12:43, Steve Purcell wrote:
>
>> Empty seqs are logically true, so your "if" condition is always true.
>
>
> Apologies; I'm talking rubbish:
>
> user=> (if '() (println "truthy"))
> truthy
> nil
> user=> (if (seq '()) (
Steve and Jon,
On Mon, Jun 7, 2010 at 12:43, Steve Purcell wrote:
> Empty seqs are logically true, so your "if" condition is always true.
>
I was looking at that today too. I did (> 0 (count my-list)) in my if
statement to fix it.
Is the Recursive Looping example on
http://clojure.org/function
On 7 Jun 2010, at 12:43, Steve Purcell wrote:
> Empty seqs are logically true, so your "if" condition is always true.
Apologies; I'm talking rubbish:
user=> (if '() (println "truthy"))
truthy
nil
user=> (if (seq '()) (println "truthy"))
nil
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On 6 Jun 2010, at 15:30, Jon Seltzer wrote:
> I'm still learning Clojure and doing so by reading everything on
> clojure.org. I ran across this example in the Functional Programming
> section:
>
> (defn my-zipmap [keys vals]
> (loop [my-map {}
> my-keys (seq keys)
> my-vals (seq
isLetter accepts single characters, you gave it a string with a length of one.
The error is caused by reflection when clojure searches for a function
with the signature isLetter(String)
On Monday, June 7, 2010, AJ Sterman wrote:
> (Character/isLetter "x")
> # method found: isLetter (NO_SOURCE_FI
I'm attempting to read and understand core.clj, and I'm walking
through methods as I run into them, trying to understand them, line by
line. I' mostly understand read-lines (w/ the exception of the last
line), but I do not follow lazy-seq or if-let. Could someone check my
deconstruction of read-lin
(Character/isLetter "x")
#
i tried a few "use ' " and there was no avail
Thank you for trying to help
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I'm still learning Clojure and doing so by reading everything on
clojure.org. I ran across this example in the Functional Programming
section:
(defn my-zipmap [keys vals]
(loop [my-map {}
my-keys (seq keys)
my-vals (seq vals)]
(if (and my-keys my-vals)
(recur (assoc
Hi everybody,
I've implemented a very simple job distribution service:
http://github.com/schani/clj-simple-dist
It's based on RMI, so it requires Clojure 1.2 to serialize Clojure
data. It's (supposed to be) fault-tolerant, very simple to set up and
even has a little web interface that reports
On 7 June 2010 07:58, Steve Purcell wrote:
> On 7 Jun 2010, at 04:28, Dave Pawson wrote:
>
>> On 6 June 2010 13:35, Moritz Ulrich wrote:
>>> Note the "Added in Clojure version 1.2" in the documentation of numerator
>>> ;-)
>>
>>
>> Not until I'd blown up the text.
>> Don't expect text that size
For what it's worth, I found that working with complex numbers in
clojure doesn't require specialist types or notation at all:
(defn complex-times [[a_re a_im] [b_re b_im]] [(- (* a_re b_re) (*
a_im b_im)) (+ (* a_re b_im) (* a_im b_re))])
(defn complex-plus [[a_re a_im] [b_re b_im]] [(+ a_re b_r
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