I'm a little apprehensive about sharing this project with others, but I
thought I might as well try.
I'm very interested in any feedback, but for now the license is a
bit-non-open.
There are modifications that I'm still wanting to make to the core before I
fully open the license.
Here's a bit of
On Jul 3, 11:11 pm, Gert Verhoog wrote:
> This seems to work:
>
> (def triangle-numbers (lazy-cat [1] (map + (iterate inc 2) triangle-
> numbers)))
>
> cheers,
> gert
Gert,
Your proposed change works very well.
It's interesting that a (seemingly) small change makes a huge
difference in perfo
On 4/07/2009, at 2:42 PM, David Cabana wrote:
> (defn triangle-numbers []
> (lazy-cat [1] (map + (iterate inc 2) (triangle-numbers
>
> This second approach dies with a stack overflow. Can anyone shed some
> light on why?
The last (triangle-numbers) is recursive, but without loop/recur this
Corey Haines, the touring software journeyman, recently spent a few
days at Relevance (including a day pairing on a Clojure project). At
the end, he videoed a conversation with me [1]. In Part 2 of the video
we talk about Clojure.
The conversation does not go at all deep technically, but if
I'm working one of the Euler project problems, which asks for the
first triangle number with more than 500 divisors. I thought it might
be fun to use lazy sequences, and tried two approaches. One worked,
the other blew the stack. I'm trying to understand why the second
approach fails.
Here's the
Jon Harrop wrote:
> Scala
> feels like a minor departure from Java to me, and I am not a Java fan. In
> fact, more like C# 3 than any real functional language
Don't say that too loud unless you're ready for a drawn-out flame war.
http://enfranchisedmind.com/blog/posts/scala-not-functional/
~~
Probably the following is much less efficient than the other solutions
proposed, but I find it easier to understand (and if I didn't
misunderstand the problem it gives the right answer).
(defn simplify-1
"remove adjacent pairs of opening/closing brackets"
([string] (simplify-1 "" string))
On Thursday 02 July 2009 07:58:11 you wrote:
> I wonder if Jon Harrop is still planning to write Clojure for
> Scientists or Scala for Scientists or both?
I am certainly interested in writing both books. I reviewed Scala back in 2007
and decided that it was not ready to be advocated. Perhaps thi
Hi Kai,
2009/7/2 Kai :
> @Rick
>
> I got fairly far into this before I had problems with stack overflows.
> I found out later than I needed knowledge of trampoline and mutual
> recursion to solve the issue. I think the approach still has potential
> but the setback forced me to consider other opt
I suspect you are not using double arrays with direct array manipulation in
CLojure.
I wonder whether it is linked to the fact your arrays are not in local (let)
variables.
I will try to randomly change a few things in your implementation tomorrow.
Best,
Nicolas.
On Fri, Jul 3, 2009 at 9:56 PM
Howdy,
The DC Clojure Study Group is working on a mashup tool, with Yahoo
Pipes as an inspiration. I'm tasked with building a reader module to
read from Twitter, which uses OAuth. This led me to consider the
broader task of writing an OAuth library, and that led me immediately
to the hope that so
On Jul 3, 4:30 pm, Shawn Hoover wrote:
> Interesting. Maybe I'm crazy, but when running java -server, replacing
> vectors/assoc with arrays/aset slowed my project down from 4000
> iterations/second to 100! Similarly, removing multimethods for each
> instruction and loop/recur to churn through the
I setup a Meetup Group
http://www.meetup.com/Clojure-NYC
It would be great if people who might be interested in attending join
the group. It's free.
I'm working on setting up our first meeting.
Please send me any thoughts on topics of interest, possible
presenters, etc.
Looking forward to meeti
I probably should have titled this thread better so people would see
it...
"Hiring full-time work-at-home clojure devs" :D
On Jul 2, 9:39 am, dysinger wrote:
> We need to hire some more devs full time to work on a clojure project
> (distributed backend hardcore clojure - not web dev).
>
> I wou
On Jun 19, 2:44 pm, Rich Hickey wrote:
> On Fri, Jun 19, 2009 at 9:35 AM, Eric Willigers wrote:
>
> > On Jun 18, 9:35 pm, Rich Hickey wrote:
> >>http://clojure.org/refs
>
> >> point #8:
>
> >> "If a constraint on the validity of a value of a Ref that is being
> >> changed depends upon the simu
On Fri, Jul 3, 2009 at 9:29 AM, igorrumiha wrote:
>
> On Jul 2, 7:13 pm, Nicolas Oury wrote:
>
> You can also try to replace the arithmetic by unchecked arithmetic. (Is it
> > correct from the point of view of the semantic of the VM you are
> > implementing?).
>
> I didn't get to that yet becaus
2009/7/3 Christophe Grand :
> Hi all!
>
> On Thu, Jul 2, 2009 at 11:09 PM, Laurent PETIT
> wrote:
>>
>> (def push conj)
>> (def closing-counterpart { \( \), \[ \] })
>> (def opening-char? closing-counterpart)
>> (defn matching-pair? [left right] (= right (closing-counterpart left)))
>>
>> (defn c
On Jul 2, 7:13 pm, Nicolas Oury wrote:
> Hello,
> I just have a look at your code. I was wondering why reflect.Array/getDouble
> was faster than aget?
(aget arrayname) actually makes a call to java.lang.reflect.Array/get
which looks at the type of data in the array and then does the right
thing.
On Jul 3, 5:27 am, jon wrote:
> Hi, could Rich or someone knowledgeable look into this (reflection
> related?) NullPointerException in Compiler.java.
> I think it's either a bug or at least should provide a better error
> message, but I don't have any time to look deeper into it..
> Thanks, Jon
Hi all!
On Thu, Jul 2, 2009 at 11:09 PM, Laurent PETIT wrote:
> (def push conj)
> (def closing-counterpart { \( \), \[ \] })
> (def opening-char? closing-counterpart)
> (defn matching-pair? [left right] (= right (closing-counterpart left)))
>
> (defn consume-one [stack c]
> (if (or (opening-char
On Jul 3, 11:25 am, Tom Faulhaber wrote:
> Parth,
>
> I was thinking about this a little more today and I came up with a way
> to extend the pretty printer easily to support *print-radix* with a
> little wrapper. I'll try to get a chance to write it up for you
> tomorrow.
>
> Tom
>
Sounds perf
Hi, could Rich or someone knowledgeable look into this (reflection
related?) NullPointerException in Compiler.java.
I think it's either a bug or at least should provide a better error
message, but I don't have any time to look deeper into it..
Thanks, Jon
-
I was using clojure-1.0 but looks l
On Fri, Jul 3, 2009 at 00:50, Laurent PETIT wrote:
>
> Hey, how come we did not see this even more concise version sooner ? :-):
>
> ;; using just clojure 1.0.0 without any additional library :-)
> ;; from command line:
> ;; java -cp clojure.jar /path/to/challenge2.clj "()" "((([[]])))" ... ...
>
Steve,
Could this be done such that % java -cp /sq/ext/clojure/clojure.jar
clojure.main demo.clj foo bar baz the highlighted part won't the there? But
would be ''attached'' behind the scene .
Regards,
Emeka
On Thu, Jul 2, 2009 at 6:17 PM, Stephen C. Gilardi wrote:
>
> On Jul 2, 2009, at 2:00
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