Hi,
I've just run across a different error reporting in 1.3.0-alpha2 to
the one in 1.2. See the sample below.
Clojure 1.3.0-alpha2
user=> (use 'clojure.contrib.monads)
nil
user=> ((fetch-val 1) 4)
ClassCastException java.lang.Long cannot be cast to clojure.lang.IFn
clojure.contrib.monads/fetch-va
I don't recall all the reasons and details from Rich's conj talk, but
this is expected behavior now; your numbers are now Longs internally
by default.
See
http://github.com/clojure/clojure/commit/845c63e9317826a5564ef766550562b3fbe68181
Chris
On Thu, Oct 28, 2010 at 6:00 AM, Jacek Laskowski wr
Hi,
did anyone encounter "OS process timed out" errors with the clutch
view server for Couch? Defining the same view with javascript works
fine, but when using clojure the view hangs and Couch basically logs
"OS process timed out" errors. The command line seems to work. I could
start the view serv
Here we go:
http://david-mcneil.com/post/1393750407/clojure-conj-day-1-notes
Check the notes at the bottom from Rich's talk; it's the part about
unified primitives and boxed numbers.
Chris
On Thu, Oct 28, 2010 at 7:20 AM, Chris Maier
wrote:
> I don't recall all the reasons and details from Ric
> Does this help?
>
> user> (use 'clojure.string)
> nil
> user> (join "," (range 10))
> "0,1,2,3,4,5,6,7,8,9"
It still doesn't work for the list of strings. But thanks for
reminding about it.
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> Are you looking for pr-str?
>
> user> (pr-str "foo")
> "\"foo\""
Yeah, that's exactly what I tried to implement with my `pr-to-str`,
thank you.
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On Wed, Oct 20, 2010 at 3:21 PM, Rich Hickey wrote:
>
>
> On Oct 20, 1:34 pm, cej38 wrote:
>> This question leads into something that I read in Joy of Clojure (page
>> 161 in the latest MEAP edition):
>> "If you manage to hold onto the head of a sequence somewhere within a
>> function, then that
Hi!
A little stuck on how to do this efficiently. I have data that looks
like this
( [ [1 2] [3 4] [5 6] ... ] [ [5 6] [7 8] [9 0] ... ] ...)
I am trying to sum the vector pairs, e.g
[6 8] [10 12] [14 6]
thx!
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> A little stuck on how to do this efficiently. I have data that looks
> like this
>
> ( [ [1 2] [3 4] [5 6] ... ] [ [5 6] [7 8] [9 0] ... ] ...)
>
> I am trying to sum the vector pairs, e.g
>
> [6 8] [10 12] [14 6]
Try:
user> (def all-pairs '([ [1 2] [3 4] [5 6] ] [[5 6] [7 8] [9 0]]) )
#'use
I don't know if use of `partial' is considered idiomatic, but I think
it's the clearest in cases like this.
user> (def all-pairs '([ [1 2] [3 4] [5 6] ] [[5 6] [7 8] [9 0]]) )
#'user/all-pairs
user> (apply map (partial map +) all-pairs)
((6 8) (10 12) (14 6))
-- Eric
Ulises writes:
>> A littl
What is the full path of that program in the 1.2.0 bundle? I can't
seem to find it.
On Oct 27, 4:23 pm, dmiller wrote:
> Let me know on the error.
>
> Re REPL: run Clojure.Main.exe to start.
>
> -David
>
> On Oct 27, 2:54 pm, Sean Devlin wrote:
>
> > So, I just started running w/ Clojrue CLR.
I would like to apply an higher order function on an arbitrarily
nested data structure which yields exactly the same structure but the
original values replaced by the result of applying the passed in
function.
This is somewhat akin to the fmap function in Functor type class in
haskell. I had a bri
Hello all
I switched from org.danlarkin/clojure-json library to
clojure.contrib.json, and found that all non-ascii characters are encoded
as \u characters. But information on json.org states that character
could be "any-Unicode-character-except-"-or-\-or-control-character"
So, it seems that
Like my same fn or something different? Maybe combine it with
prewalk?
Sean
On Oct 28, 10:42 am, Amitava Shee wrote:
> I would like to apply an higher order function on an arbitrarily
> nested data structure which yields exactly the same structure but the
> original values replaced by the resul
Functor's fmap in Haskell is passed where to apply the function as an
(hidden in the type class dictionary) argument.
You would need somehow to be more specific about where you want to
apply your function in the data-structure.
(On predefined position, a la Functor, or on every leaf, with a
defini
Without each type specifying where it would like the function applied
the result will be sort of hacky, but here's my hackey attempt at fmap
in clojure.
It makes some assumptions (e.g. you would only want to apply f to the
values rather than the keys of a hash). Also I'm not sure what the best
wa
In order to better inform my thinking here, I want to ask: "So what's
the target here?"
Are we looking to enhance Clojure's core documentation or do you have
specific projects of your own for which you'd like these features?
For example, my rationale for images is that I want to be able to
includ
It's not a bug, but a design decision based on the fact that encoding
is so easy to screw up. I'd accept a patch that made it optional.
-S
On Thu, Oct 28, 2010 at 11:02 AM, Alex Ott wrote:
> Hello all
>
> I switched from org.danlarkin/clojure-json library to
> clojure.contrib.json, and found t
Okay, you're re-inventing clojure.walk. Please take a look at that
namespace.
On Oct 28, 11:52 am, "Eric Schulte" wrote:
> Without each type specifying where it would like the function applied
> the result will be sort of hacky, but here's my hackey attempt at fmap
> in clojure.
>
> It makes som
Is anyone working on clojure for the parrot vm?
-Terrance
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On Thu, Oct 28, 2010 at 12:19 PM, Tom Faulhaber wrote:
> In order to better inform my thinking here, I want to ask: "So what's
> the target here?"
>
> Are we looking to enhance Clojure's core documentation or do you have
> specific projects of your own for which you'd like these features?
All of
Github automatically provides a zip of any tagged commit, so you can
download the source for the 1.2.0 release. That's the link with the
little tag icon on it. That is a source distribution and you'd have
to follow a long involved path to get that to run. I took the
instructions for that off the
On 28 Oct 2010, at 16:42, Amitava Shee wrote:
I would like to apply an higher order function on an arbitrarily
nested data structure which yields exactly the same structure but the
original values replaced by the result of applying the passed in
function.
This is somewhat akin to the fmap funct
My interest is general improvement of Clojure documentation. At the
conj, I spoke with Zack Kim about helping to improve the state of the
documentation. My goal was to contribute additional documentation for
vars that are lacking, as well as clarifying some of the more
confusing doc strings (actu
I have some code that counts the elements in a list that map to true
in a lookup table, looking something like this:
(def lookup-table {1 true, 2 false})
(def elements (range 100))
(count (filter lookup-table elements))
On my machine, with server mode enabled, the count + filter got ~10
times
On Thu, Oct 28, 2010 at 1:49 PM, Chris Maier
wrote:
> Here we go:
>
> http://david-mcneil.com/post/1393750407/clojure-conj-day-1-notes
>
> Check the notes at the bottom from Rich's talk; it's the part about
> unified primitives and boxed numbers.
Thanks. That helped.
Jacek
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N
hi,
not looking to stir up a pot, looking to learn from people's
experience. i've heard that in CL land, one is told to avoid macros as
long as possible. i've heard other folks in the Clojure world say that
if you aren't using macros, then sorta why bother use a Lisp since you
are missing out on o
Okay, functor is a good idea but a weak implementation. My complaint
is that it only provides functor behavior for the map function. same
is a higher order function that works on anything, and is based on
protocols. Take a look at the test cases to understand what I'm
talking about.
http://gith
On Oct 28, 2010, at 2:55 PM, Raoul Duke wrote:
> not looking to stir up a pot, looking to learn from people's
> experience. i've heard that in CL land, one is told to avoid macros as
> long as possible. i've heard other folks in the Clojure world say that
> if you aren't using macros, then sorta w
On Thu, Oct 28, 2010 at 1:08 PM, Michael Gardner wrote:
> Use a macro iff you can't do what you want with a function.
sorta true, perhaps leading to the kernel question: how do you decide
what it really is you want/need to do? cf. the use of macros then not
use of macros in enlive.
sincerely.
-
Hi,
Am 28.10.2010 um 21:55 schrieb Raoul Duke:
> i've heard other folks in the Clojure world say that
> if you aren't using macros, then sorta why bother use a Lisp since you
> are missing out on one of the most powerful differentiators.
These people ^^^ should listen carefully to those people
On Thu, 28 Oct 2010 12:55:55 -0700
Raoul Duke wrote:
> hi,
>
> not looking to stir up a pot, looking to learn from people's
> experience. i've heard that in CL land, one is told to avoid macros as
> long as possible. i've heard other folks in the Clojure world say that
> if you aren't using macr
Worked great for meThanks Stuart for wrestling with the dragon.
I've created and shared a couple of simple issue filters to get issue-
browsers started. Search for them under managing filters section.
cheers,
-tom
On Oct 27, 6:07 pm, Stuart Halloway wrote:
> Thanks to Contegix tech s
I am happy to announce fundata1 -- the largest-ever program per RAM
allocation in Haskell, originally implemented in Clojure and then
OCaml and Haskell for social network modeling.
http://github.com/alexy/fundata1
It has now become the first large-scale social networking benchmark
with a real dyn
Hi,
I have a code similar to this:
(def pairs (list [1 :a] [2 :b] [3 :c]))
...
(loop [ps pairs, ret {}]
(cond (empty? ps) ret
(some-test (first (first ps))) (recur (rest ps) (add-to-
result ret (first (first ps
:true (recur (rest ps) (do-smth-else ret (first (fir
On Fri, Oct 29, 2010 at 1:58 AM, Mike Meyer <
mwm-keyword-googlegroups.620...@mired.org>
>
> 3) You need it to get the API syntax you want (most commonly, a DSL).
>
>
This last point is what I consider the most powerful feature of any
language. And thats what makes Lispy languages a class apart. Us
user=> (doc ffirst)
-
clojure.core/ffirst
([x])
Same as (first (first x))
nil
user=>
That could help a bit :
Luc P.
andrei wrote ..
> Hi,
>
> I have a code similar to this:
>
> (def pairs (list [1 :a] [2 :b] [3 :c]))
> ...
> (loop [ps pairs, ret {}]
> (cond
I'd hoist the empty out of the cond using an if:
(if (empty? ps)
ret
(let [fps (first (first ps))]
(cond
...)))
On Thu, Oct 28, 2010 at 8:49 PM, andrei wrote:
> Hi,
>
> I have a code similar to this:
>
> (def pairs (list [1 :a] [2 :b] [3 :c]))
> ...
> (loop [ps pairs
I'll try to extend Mike's answer by one more example. Consider `and`
Lisp macro. It is not a function, because it must evaluate it's
arguments lazily, and using macros is the only way to do it. But try
to apply `and` to the list of values (I know, that it's a job for a
function `every?`, but how w
On Fri, 29 Oct 2010 06:30:27 +0530
Santosh Rajan wrote:
> On Fri, Oct 29, 2010 at 1:58 AM, Mike Meyer <
> mwm-keyword-googlegroups.620...@mired.org>
> > 3) You need it to get the API syntax you want (most commonly, a DSL).
> This last point is what I consider the most powerful feature of any
> la
On Thu, 28 Oct 2010 18:12:39 -0700 (PDT)
andrei wrote:
>
> I'll try to extend Mike's answer by one more example. Consider `and`
> Lisp macro. It is not a function, because it must evaluate it's
> arguments lazily, and using macros is the only way to do it.
Actually, this is the first case, and
Andrei,
You could just bind another local variable in the loop form:
(loop [ps pairs
ret {}
ffps (ffirst ps)]
(cond (empty? ps) ret
(some-test ffps) (recur (rest ps) (add-to-result ret ffps) (ffirst
(rest ps)))
:true (recur (rest ps) (do-sth-else ret ffps) (ffirst
On 28.10.2010, at 21:57, Sean Devlin wrote:
> Okay, functor is a good idea but a weak implementation. My complaint
> is that it only provides functor behavior for the map function. same
> is a higher order function that works on anything, and is based on
> protocols. Take a look at the test cas
(defn accepts-arity? [n f]
(reduce
#(or
%1
(= n (count %2))
(and (= '& (last (butlast %2))) (>= n (- (count %2) 2
false
(:arglists (meta f
This works only if f has metadata -- anonymous lambdas don't but functions
defined using defn do.
I thought this up w
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