On Jun 26, 8:23 pm, _hrrld wrote:
> Hi,
>
> I'm trying to use lazy-seq to implement a cool piece of functionality
> I saw in the Factor programming language. Here is the documentation
> for that
> functionality:http://docs.factorcode.org/content/word-produce,sequences.html
>
> I think a lazy ver
On Jun 17, 4:00 pm, Rich Hickey wrote:
> On Jun 17, 1:22 am, Wrexsoul wrote:
> > The docs definitely have problems if this can be missed despite a very
> > thorough search. The only more-thorough search would have been to
> > actually read the docs in their entirety, rathe
s here.
>
> My apologies to Wrexsoul. I was out of line. Civility and mutual
> respect are more important.
Thank you.
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On Jun 17, 2:47 pm, Kyle Schaffrick wrote:
> As a friendly suggestion, I'd like to offer that perhaps the derision is
> caused not by the fact that you had the initiative to implement it
> yourself, but rather by such phrasing as:
>
> > I'm shocked that [reduce/accum/foldr] is missing from clojur
On Jun 17, 2:25 pm, Cosmin Stejerean wrote:
> On Wed, Jun 17, 2009 at 12:51 PM, Wrexsoul wrote:
>
> > > Even though clojure.contrib hasn't been released as 1.0 or anything
> > > official-sounding, I reckon it still beats the heck out of me
> > > rein
On Jun 17, 10:51 am, Mark Volkmann wrote:
> On Wed, Jun 17, 2009 at 9:41 AM, CuppoJava wrote:
> > Finding the right function in the doc admittedly takes a little
> > practice. I've learned gradually, that Clojure pretty much has all its
> > bases covered though. You just need to find the function
On Jun 17, 3:20 am, kkw wrote:
> I only knew about map, apply, and reduce from studying haskell in uni.
> I've not heard of 'reduce' referred to as 'accum', but then again when
> I wanted to determine the number of elements in a seq, I kept
> searching for 'length' and 'size' but didn't think of
On Jun 17, 2:05 am, Parth wrote:
> On Jun 17, 10:24 am, Wrexsoul wrote:
>
> > On Jun 17, 12:44 am, Daniel Lyons wrote:
>
> > > (use 'clojure.contrib.seq-utils)
>
> > Don't have that library. Still hasn't been released yet, last I
>
On Jun 17, 3:10 am, Mark Derricutt wrote:
> There's prebuilt SNAPSHOT releases available in Howard's Tapestry repository
> - been using them happily from my maven based clojure app for awhile.
> Thou an official 1.0 stamped release in maven central (along with
> clojure-lang) would be most welcom
On Jun 16, 10:43 pm, Richard Newman wrote:
> The docs produced by the Git project aren't proprietary: there are
> plenty at [1], not to mention `man git`. I just see a great deal of
> value in clear, explanatory text
Enough value that there should be free clear, explanatory text about
open s
On Jun 17, 12:57 am, Sean Devlin wrote:
> Daniel, don't feed the WrexTroll
Personal attacks are unwelcome here.
> > Indeed! It's called reduce:
>
> >http://clojure.org/api#toc476
>
> > I'm shocked you haven't noticed it in the API documentation.
I SPECIFICALLY did a search of the entire api do
On Jun 17, 12:44 am, Daniel Lyons wrote:
> Indeed! It's called reduce:
>
> http://clojure.org/api#toc476
>
> I'm shocked you haven't noticed it in the API documentation.
I SPECIFICALLY did a search of the entire api docs to see if there was
anything like "accum" already in there. I examined ever
On Jun 17, 12:44 am, Parth wrote:
> On Jun 17, 9:34 am, Wrexsoul wrote:
> > I'm shocked that this is missing from clojure.core:
>
> > (defn accum [f init coll]
> > (loop [x init c coll]
> > (if (empty? c)
> > x
> > (recur (f x (fi
I'm shocked that this is missing from clojure.core:
(defn accum [f init coll]
(loop [x init c coll]
(if (empty? c)
x
(recur (f x (first c)) (rest c)
user=> (accum + 0 [1 2 3])
6
user=> (accum + 0 [1 2 3 4 5])
15
This is one of the most basic, useful functions in functional
On Jun 16, 10:04 pm, Antony Blakey wrote:
> On 17/06/2009, at 10:58 AM, Antony Blakey wrote:
>
> >http://www.pragprog.com/screencasts/v-scgithub/insider-guide-to-github
>
> BTW: the first episode of this is free
On Jun 16, 9:56 pm, Richard Newman wrote:
> > And I forgot I had this:https://peepc
On Jun 14, 2:53 pm, James Reeves wrote:
> On Jun 14, 6:32 pm, Wrexsoul wrote:
>
> > I wrote super-lazy-seq because repeatedly can't generate a finite
> > sequence. It just spat out
>
> > (File1 File2 File3 File4 nil nil nil nil nil nil nil ...
>
>
On Jun 14, 9:39 am, James Reeves wrote:
> Okay, but don't underestimate the power of higher level functions. I
> don't know whether it would apply to your code, but the repeatedly
> function can be used to create a lazy seq from a function with side-
> effects.
>
> For example:
>
> (defn custom
On Jun 13, 10:46 pm, "Stephen C. Gilardi" wrote:
> On Jun 13, 2009, at 7:37 PM, Kevin Downey wrote:
>
> > works for me
>
> It's working for me in Java 6, but not Java 5. It looks like something
> changed there.
Autoboxing.
What I miss is foo-array for foo not in #{int long float double},
part
On Jun 13, 11:07 pm, James Reeves wrote:
> For instance, lets say I want to return a lazy list of all the lines
> in all the files in a directory tree:
>
> (use '(clojure.contrib java-utils
> duck-streams))
When clojure.contrib releases version 1.0, that might be an op
; > you should take a look at it :)
>
> Wrexsoul: Since you don't seem to have stumbled across
> clojure-contrib yet, here is where you can find
> it:http://code.google.com/p/clojure-contrib/ :)
Went there earlier.
http://code.google.com/p/clojure-contrib/downloads/list
&q
On Jun 13, 9:24 pm, James Reeves wrote:
> On Jun 13, 4:18 am, Wrexsoul wrote:
>
> > Between files-and-dirs and file-lines-seq I think I have saved as many
> > lines of code as are in the macro+helper fns, so those are at break-
> > even.
>
> I'm not complete
On Jun 13, 4:11 pm, Jarkko Oranen wrote:
> Also, try using (find-doc "foo") and (doc foo) in a repl for
> documentation searches. For this function, you might want to check out
> if-let.
Find-doc seems to give about the same results as searching through the
API page, only also cluttering up the
Now I'm working on some Swing code and came up with these, which are
obviously going to be useful:
(defmacro do-on-edt [& body]
`(SwingUtilities/invokeLater #(do ~...@body)))
(defmacro get-on-edt [& body]
`(let [ret# (atom nil)]
(SwingUtilities/invokeLater #(reset! ret# [(do ~...@body)]
On Jun 13, 3:03 pm, Emeka wrote:
> kedu Wrexsoul
>
> user=> (count-more-than? 0 ())
> true
>
> (defn count-more-than? [n xs]
> (if (not (seq xs))
> (or (zero? n)
> (recur (dec n) (rest xs)
>
> I'm afraid your code didn't return true
On Jun 12, 9:44 pm, James Reeves wrote:
> (defn count-more-than? [n xs]
> (or (zero? n)
> (if (seq xs)
> (recur (dec n) (rest xs)
>
> (defn interesting? [pixels c]
> (count-more-than? c (filter in-interval? pixels)))
Nice, but
user=> (count-more-than? 0 ())
tru
Here's a bit more, public domain as usual:
(defn get-ultimate-cause [exception]
(loop [e exception]
(let [e2 (. e getCause)]
(if-not e2
e
(recur e2)
(defmacro with-stack-trace [& body]
`(try (eval (quote (do ~...@body)))
(catch Throwable ex#
(. (get-
Heh. Thought of an improvement:
(defn make-atom-setter-fn-expr [names skip?]
(let [arglist-1 (map #(gensym %) names)
arglist (vec (if skip? arglist-1 (cons (gensym 'item)
arglist-1)))]
`(~(if skip? 'skip-item 'next-item)
~arglist
~@(map (fn [nm gs] (list 'reset! nm gs))
Well, I did it. Made implementing lazy seqs that require stateful
generator functions easy, that is:
(defn files-and-dirs-recursive [dir]
(super-lazy-seq [stack [(to-file dir)]]
(if-not (empty? stack)
(let [file (first stack) s (rest stack)]
(next-item
file
On Jun 12, 4:58 pm, Chouser wrote:
> > So it looks like when the compiler expands defonce, it actually
> > evaluates a def right then and there, rather than the def only being
> > evaluated when the expansion of the defonce macro is evaluated.
>
> Yes, the var is interned in the namespace at comp
On Jun 12, 5:58 pm, Meikel Brandmeyer wrote:
>
> (defn eager-seq
> [s]
> (into [] s))
I guess that'd work.
> > (with-files-line-seq (file1 file2 file3) lines
> > (take 10 lines))
>
> The more idiomatic form would be [file1 file2 file3]
> for the file arguments. Using (file1 file2 file3)
Suggestion 1: In the undefined-symbol error message, special-case
#
by adding a note in the specific cases of clojure.core/unquote and
clojure.core/unquote-splicing saying "The most common cause of this is
forgetting a backtick in a macro." Var clojure.core/anything is
unbound will otherwise ten
On Jun 12, 11:58 am, CuppoJava wrote:
> I would agree with Chouser. My first look at Lisp really turned me
> away from FP, until I gave Clojure a chance.
Same here, just about. Clojure has two very big advantages:
1. Access to the huge, very useful Java standard library. Graphics,
threads, n
On Jun 12, 12:16 pm, Chouser wrote:
> On Thu, Jun 11, 2009 at 3:35 AM, Wrexsoul wrote:
>
> > On a side note, I've noticed a few issues with clojure
> > that could use a bit of sprucing up, no disrespect
> > intended:
>
> > * If REPL code goes into infinite l
Consider this public domain for copyright purposes.
Try it at the repl with:
(defn make-counter [] (let [i (atom 0)] #(do (swap! i + 1) @i)))
(def *counter* (make-counter))
(do-asynch-periodically *xxx* 1 (println (*counter*)))
(do-asynch-periodically *xxx* 1 (println (str "changed!
" (*counter*
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