You could also use group-by:
user=> (group-by odd? [1 2 3 4 5])
{true [1 3 5], false [2 4]}
The nice thing is that you can also use this with functions that return more
than 2 values:
user=> (group-by class [0 nil false])
{java.lang.Integer [0], nil [nil], java.lang.Boolean [false]}
--
It exists in clojure.contrib, and it's called separate. It's easy to
rewrite, of course, as you note; but I prefer:
(def split-pred (juxt filter remove))
On Jun 25, 8:56 pm, Alex Baranosky
wrote:
> Something like this is probably good:
>
> (defn split-pred [pred coll]
> [(filter pred coll) (re
Something like this is probably good:
(defn split-pred [pred coll]
[(filter pred coll) (remove pred coll)])
But I wanted to make sure I wasn't reinventing the wheel!
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Is there a function built-in to Clojure that given a seq and a predicate
will return a list of 2 lists, the items that passed the predicate and the
items that failed it?
(split-em odd? [1 2 3 4 5]) => ((1 3 5) (2 4))
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On Sat, Jun 25, 2011 at 9:21 AM, Paul Meehan wrote:
> Has anyone tried:
>
> http://www.clojureatlas.com/
>
> Any comments/feedback?
Yup. I think it's a great way to explore the Clojure core and
libraries and it's always open in a tab in my browser. I signed up for
the 1.2.0 and the upcoming 1.3.0
interesting. maybe I can change my interface in this thing I abandoned a
while back: http://code.google.com/p/jc-pheap/
to match that of the contrib, "priority map". I had gotten stuck figuring
out the right interface/usage/idioms for clojure and kinda messed the whole
thing up in later checkins
Hi
Has anyone tried:
http://www.clojureatlas.com/
Any comments/feedback?
thanks
Paul C. Meehan
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Note that posts from new members are moder
Hi all,
can anybody help me, how to fix the following problem? I have a
function like this:
(defn set-config-value
"sets a new value programatically to a config key"
[value & tags]
;; set the new value and save the config file?
;;(zip/edit tags (zip/xml-zip(load-config)) value )
;; Save
It sounds like your project.clj is broken, possibly because it reads
defproject test_csv
...
instead of
(defproject test_csv
...)
But my psychic powers reach no further than that. Maybe you should
paste your project.clj, or even your whole project on github.
On Jun 25, 4:41 pm, octopusgrabb
I'm on a home system, same version of Ubuntu as at work. I am able to
build clojure-csv with no problems using cake.
When sitting in my project directory, test_csv, even cake help results
in this error
Caused by: java.lang.Exception: Can't take value of a macro:
#'cake.core/defproject
but when I
Note that it's still pretty immature - I started writing it last
weekend. It's tested fairly thoroughly, and I spent four or five days
hunting down the best performance I could, so it should be perfectly
usable. However, if you have any problems please let me know.
Especially, if you plan to disso
array-map turns into a hashmap after ten insertions, currently, but
that's far from guaranteed:
user> (->> {}
(iterate #(assoc % (rand-int 1e6) 1))
(drop-while (comp #{(class {})} class))
(first)
(count))
10
My ordered-set/map are now available on cloja
I wonder at what point array-map becomes a hash-map? Maybe I could use it?
On second thought, I don't really want to depend on something so
flimsy.
Alan, is your ordered map code available on clojars?
Alex
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Hi Ken,
Having a mutable stm-map would be awesome. I actually had to implement one
for my project at work. Sorry can't publish it due to licensing issues, but
anyway my implementation is dead simple and won't perform well on big data
sets. I was trying to understand how to implement detection of n
On Sat, Jun 25, 2011 at 4:17 PM, Phil Hagelberg wrote:
> I suspect part of your problem comes from using records where you should be
> using maps. Records are a relatively advanced feature; I have been using
> Clojure for two years without ever finding a use for them. Learn to walk
> before you r
On Sat, Jun 25, 2011 at 2:11 PM, David Nolen wrote:
> On Sat, Jun 25, 2011 at 2:06 PM, Gregg Reynolds wrote:
>
>> (ns gae-lex.test.dataServiceTests
>> (:use [gae-lex.core])
>> (:import (gae-lex.core.Author))
>> ...)
>>
>
> (ns gae-lex.test.dataServiceTests
> (:use [gae-lex.core])
> (:imp
I suspect part of your problem comes from using records where you should be
using maps. Records are a relatively advanced feature; I have been using
Clojure for two years without ever finding a use for them. Learn to walk
before you run.
-Phil
On Jun 25, 2011 11:06 AM, "Gregg Reynolds" wrote:
--
On Sat, Jun 25, 2011 at 4:18 PM, Laurent PETIT wrote:
> Beware the devil hidden in the details:
> "
> Note that an array map will only maintain sort order when
> un-'modified'. Subsequent assoc-ing will eventually cause it to
> 'become' a hash-map.
> "
Besides a LinkedHashMap-alike, Clojure could
Beware the devil hidden in the details:
"
Note that an array map will only maintain sort order when
un-'modified'. Subsequent assoc-ing will eventually cause it to
'become' a hash-map.
"
2011/6/25 Alex Baranosky :
> Ha! Perfect. Thanks.
>
> On Sat, Jun 25, 2011 at 4:00 PM, James Estes wrote:
>>
ArrayMap isn't very performant for large collections. You might like
https://github.com/flatland/ordered
On Jun 25, 1:11 pm, Alex Baranosky
wrote:
> Ha! Perfect. Thanks.
>
>
>
>
>
>
>
> On Sat, Jun 25, 2011 at 4:00 PM, James Estes wrote:
> > ArrayMap?
> >http://clojure.org/data_structures#toc2
Ha! Perfect. Thanks.
On Sat, Jun 25, 2011 at 4:00 PM, James Estes wrote:
> ArrayMap?
> http://clojure.org/data_structures#toc21
>
> James
>
>
> On Sat, Jun 25, 2011 at 1:55 PM, Alex Baranosky
> wrote:
> > What are some options for having a map that guarantees ordering of its
> keys
> > in Clo
ArrayMap?
http://clojure.org/data_structures#toc21
James
On Sat, Jun 25, 2011 at 1:55 PM, Alex Baranosky
wrote:
> What are some options for having a map that guarantees ordering of its keys
> in Clojure? (note: sorted-map won't do!) My first try was to use
> LinkedHashMap, but am running into
What are some options for having a map that guarantees ordering of its keys
in Clojure? (note: sorted-map won't do!) My first try was to use
LinkedHashMap, but am running into exceptions of the
" java.util.LinkedHashMap cannot be cast to clojure.lang.Associative"
variety.
So then I tried to use e
On Sat, Jun 25, 2011 at 2:06 PM, Gregg Reynolds wrote:
> (ns gae-lex.test.dataServiceTests
> (:use [gae-lex.core])
> (:import (gae-lex.core.Author))
> ...)
>
(ns gae-lex.test.dataServiceTests
(:use [gae-lex.core])
(:import [gae_lex.core Author])
...)
Should work.
David
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On Sat, Jun 25, 2011 at 12:07 PM, Meikel Brandmeyer wrote:
> Hi,
>
> Am 25.06.2011 um 18:35 schrieb Gregg Reynolds:
>
> > This is using the standard clojure-test stuff. I've tried every way I
> can think of to get Author into the namespace with no luck. Since the
> defentity statement occurs in
This looks like an issue with hyphenated attribute names in deftype.
defrecord seems to be fine.
user> *clojure-version*
{:major 1, :minor 3, :incremental 0, :qualifier "beta1"}
user> (deftype Foo [foo])
user.Foo
user> (Foo. 1)
#user.Foo[1]
user> (deftype Bar [bar-id])
user.Bar
user> (Bar. 1)
; Ev
Hi,
Am 25.06.2011 um 18:35 schrieb Gregg Reynolds:
> This is using the standard clojure-test stuff. I've tried every way I can
> think of to get Author into the namespace with no luck. Since the defentity
> statement occurs in the myapp.core namespace I don't see why :use ing that
> isn't go
Hi,
I'm trying to use appengine-magic's datastore api, but I can't get defentity
to work across files. I can do
(ds/defentity Author [^:key name, birthday])
in core.clj, but if I try to use Author in my test core.clj I get "Unable to
resolve classname: Author".
This is using the standard cloj
On Fri, Jun 24, 2011 at 11:57 AM, .Bill Smith wrote:
> Sure could. And you don't want to do this if brownFox is a function:
>
> (Label. brownFox)
>
> If you really want it to be a function, you could do the following, but I
> think it would complicate things unnecessarily:
>
> (Label. (brownFox)
That usually means somewhere in the code, an object of class
com.vaadin.ui.Table is being used where a function is expected. For
example, evaluating this code:
("abc" 1)
...will result in "java.lang.ClassCastException: java.lang.String cannot be
cast to clojure.lang.IFn", because a String can
It seems there is some error importing com.vaadin.ui.Table. What does it
mean "cannot be cast to clojure.lang.IFn"? How I can solve it?
*
*
*exception*
javax.servlet.ServletException: java.lang.ClassCastException:
com.vaadin.ui.Table cannot be cast to clojure.lang.IFn
*root cause*
java.lang.Cl
Also see the original design page on the wiki for where things ended up.
http://dev.clojure.org/display/design/Contrib+Library+Names
--
Cheers,
Aaron Bedra
--
Clojure/core
http://clojure.com
On 06/24/2011 04:53 PM, Stuart Sierra wrote:
The monolithic "clojure-contrib" project is not being ac
It's already on the list in the ticket
http://dev.clojure.org/jira/browse/CLJ-815
On 06/24/2011 11:31 PM, Alan Malloy wrote:
What about juxt? Can we get rid of the "Alpha - name subject to
change" in the docstring there?
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Cheers,
Aaron Bedra
--
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You receiv
Hi,
you don't need the .class suffix; just use the class name. null is named nil.
Also [] is a vector, not an array. You need to-array resp. into-array. In the
addItem calls you got the “array” sizes wrong. And finally new Object[] {a, b,
c} creates a new array. Not a new Object. (Which is what
I am having problems to translate this table vaadin in java to clojure:
;; Java
Table table = new Table("This is my Table");
table.addContainerProperty("First Name", String.class, null);
table.addContainerProperty("Last Name", String.class, null);
table.addContainerProperty("Year", Intege
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