On Jun 29, 2011, at 1:45 AM, David Sletten wrote:
(defn compute-contrib [daily-values total-values]
(loop [contrib []
daily-values daily-values
total-values total-values]
(if (empty? daily-values)
contrib
(recur (conj contrib (* (first daily-values)
Hi,
just for fun another variation. The two reverse calls are ugly, but
necessary to get the order right for the reductions call.
(defn contribution
[daily-values total-values]
(let [weights (- (rest total-values)
(map #(/ % 100.0))
reverse
How about this one?
(defn calc [total-values daily-values]
(map-indexed
(fn [i daily]
(* daily
(reduce #(* %1 (inc (/ %2 100.0))) 1.0 (nthnext total-
values (inc i)
daily-values))
Happy coding.
-huahai
On Jun 28, 10:11 pm, Justin Kramer jkkra...@gmail.com
If you're already doing a bunch of multiplication in the reduce, you
don't need to do it outside as well, do you?
And because reduce doesn't care about laziness, you can use drop
instead of nthnext (which I think is clearer in almost all cases).
(defn calc [total-values daily-values]
On Wed, Jun 29, 2011 at 3:53 AM, Alan Malloy a...@malloys.org wrote:
This layout makes it fairly clear that the first element of total-
values is never being used, but it would be nice if we could say so
explicitly. So finally, we can wrap the whole thing in a let:
(defn calc [total-values
This is very nice indeed. Thanks for putting it up.
Regards,
Shantanu
On Jun 29, 3:21 am, Tim Robinson tim.blacks...@gmail.com wrote:
I'm fairly new to Programming, Clojure and Blogging, but I did manage
to write a few posts about Clojure in my spare time.
On Jun 29, 12:55 am, Ken Wesson kwess...@gmail.com wrote:
On Wed, Jun 29, 2011 at 3:53 AM, Alan Malloy a...@malloys.org wrote:
This layout makes it fairly clear that the first element of total-
values is never being used, but it would be nice if we could say so
explicitly. So finally, we
Hello,
I have uploaded a short presentation of the Lacij graph visualization
library.
It can be found here: https://docs.google.com/present/view?id=dsjwfrk_1js9ptkcd
Lacij is on GitHub:
https://github.com/pallix/lacij
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Dmitry Gutov has improved the tutorial. The code looks much better now!
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Hi there,
I'm starting to dig into 1.3 and the associated libraries. I know the
monolithic contrib library is no longer supported. But in the old contrib
library, there were the *string*, *str-utils* and *str-utils2* libs. I don't
see those or their corresponding functions in the new
The multiplication outside the reduce is required because it is part
of the original logic: contrib[i] = sum * dailyValues[i];. Using the
drop function is a very good call though.
-huahai
On Jun 29, 12:53 am, Alan Malloy a...@malloys.org wrote:
If you're already doing a bunch of multiplication
Hi,
I think they moved to clojure.string.
Sincerely
Meikel
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That's what I thought too, but I didn't see it in the
sourcehttps://github.com/clojure/clojure/blob/master/src/clj/clojure/string.clj.
I also fired up the repl and tried some of the functions from str-utils2,
and they weren't there...
*$ lein repl *
*user= (require 'clojure.string) *
*nil *
On Wed, Jun 29, 2011 at 17:45, Timothy Washington twash...@gmail.com wrote:
That's what I thought too, but I didn't see it in the source. I also fired
up the repl and tried some of the functions from str-utils2, and they
weren't there...
$ lein repl
user= (require 'clojure.string)
nil
user=
The idiomatic way may be to include the file(s) in the classpath and
there is already a `resource` function in clojure.java.io that can
load it from the classpath:
$ lein new foo
$ cd foo
$ mkdir resources
$ catresources/test.txt
hello
world
foo
bar
^D
$ # edit src/foo/core.clj as follows
(ns
Thanks to all for the excellent and quick responses.
David - you are right the variable should be called product not sum. This is
just some poorly written Java code that I am translating to Clojure.
Justin - thanks for the idea on how to visualize such algorithms and the
picture you shared.
Hello people.
I've created date-clj, a date/time library for clojure.
I know there's clj-time already but I was thinking about something
less javaish and more like date.js.
Some examples:
(date :day 25 :month :november :year 2000)
- #Date Sat Nov 25 00:00:00 BRST 2000
(- (today) (set-date
Nice to see so documented example!
A few remarks:
1) IMHO sandbar's approach to authorization is better that this ad-hoc one:
it places auth data just in the routes instead of controllers, see
https://github.com/brentonashworth/sandbar/wiki/Authentication-and-Authorization
2) It would be nice
java.util.Date instances aren't immutable.
2011/6/29 Islon Scherer islonsche...@gmail.com:
Hello people.
I've created date-clj, a date/time library for clojure.
I know there's clj-time already but I was thinking about something
less javaish and more like date.js.
Some examples:
(date :day
Or to be more constructive:
maybe set-date al should be renamed set-date! ...
... the more clojurish a library will look like, the more
expectations people will have on it (principle of least surprise) even
before verifying their assumptions are true (e.g. a pure clojure
library = works with
There's absolutely no shame in, where appropriate, writing a dash of Java if
your Java interop requirements are simultaneously specific and unshakable. You
could write a Java class with a single static factory method that returns an
instance of the deftype class and that does whatever
Thanks for the critic Laurent.
set-date is not destructive, it creates a new date and returns it, the
original is unaltered,
but I agree that the documentation and the function name may be
deceiving, I'll think about a better name and change the docs.
Islon
On Jun 29, 5:29 pm, Laurent PETIT
Here are some ideas I used in Indyvon (https://bitbucket.org/kryshen/
indyvon).
* Methods that modify graphics context (java.awt.Graphics2D instance)
are wrapped in with- macros, e.g. with-color sets the current color to
the specified value, executes body in try block, and resets the color
to the
Is there other way to express (((m2) 2) 1)?
(def m [1 2 [21 22 [221 222 223] 23] 3])
(((m 2) 2) 1)
;- 222
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On Wed, Jun 29, 2011 at 7:00 PM, Antonio Recio amdx6...@gmail.com wrote:
(def m [1 2 [21 22 [221 222 223] 23] 3])
(((m 2) 2) 1)
One my favorites.
(get-in m [2 2 1])
David
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On Tue, Jun 28, 2011 at 8:21 PM, Tim Robinson tim.blacks...@gmail.com wrote:
http://blackstag.com/blog.posting?id=5
I have now have a newly found appreciation for how much effort this
kind of stuff can be :)
Really nice set of posts - thank you for your effort!!
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(get-in m [2 2 1]) is great! Which are the others ones? Is there something
like (- m [2 2 1])?
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Sortof, but not as concisely, since the op is repeated each time:
(- m (nth 2) (nth 2) (nth 1))
-tom
On Jun 29, 4:20 pm, Antonio Recio amdx6...@gmail.com wrote:
(get-in m [2 2 1]) is great! Which are the others ones? Is there something
like (- m [2 2 1])?
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At this point there are 69 responses, I think they are enough to draw
some conclusions but I'll keep the survey open till later today(to see
if we can get around 100 responses).
As soon I close it, the results will be available for everyone.
On Jun 23, 9:22 pm, Milton Silva milton...@gmail.com
You can use 'reduce':
(reduce nth m [2 2 1])
;; or, for the general case
(reduce #(%1 %2) m [2 2 1])
On Jun 30, 3:20 am, Antonio Recio amdx6...@gmail.com wrote:
(get-in m [2 2 1]) is great! Which are the others ones? Is there something
like (- m [2 2 1])?
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On Wed, Jun 29, 2011 at 8:54 PM, Dmitry Gutov raa...@gmail.com wrote:
You can use 'reduce':
(reduce nth m [2 2 1])
;; or, for the general case
(reduce #(%1 %2) m [2 2 1])
or
(reduce get m [2 2 1])
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(* daily (reduce * 1 coll))
;; is exactly equal to
(reduce * daily coll)
My point is you can start with daily instead of with 1, and thus not
have to special-case it in at the end.
On Jun 29, 8:22 am, Huahai Yang huahai.y...@gmail.com wrote:
The multiplication outside the reduce is required
(defmacro -f
like - but f is threaded at pos 0 instead of 1
([f] f)
([f x] `(~f ~x))
([f x more]
`(-f (~f ~x) ~@more)))
(-f m 2 2 1)
Scott
On Wed, Jun 29, 2011 at 7:00 PM, Antonio Recio amdx6...@gmail.com wrote:
Is there other way to express (((m2) 2) 1)?
(def m [1 2 [21 22
Here's another, perhaps very controversial, solution:
(in m.2.2.1)
;; in
(defn flexible-get
([map key]
(or (let [k (read-string key)]
(and (number? k)
(get map k)))
(get map (keyword key))
(get map (name key
([map key more]
(apply
Hi,
Yesterday I read this article [1] on asynchronous UI workflows in F#.
Basically, taking a sequential set of steps in a UI that would
normally be spread across a bunch of event handlers, and making it
look like sequential code in one place. So tonight I took a stab at
implementing something
Just wanted to put a shout out to Russ Olsen to see what would be
needed to get a Russ Olsen book on clojure to happen. I am reading
design principles in Ruby and its a great read, I feel I am learning
much moe than just Ruby which is why I am reading it.
I woould absolutely love to read how
I have attached a patch to the jira issue
http://dev.clojure.org/jira/browse/CLJ-673
it checks for a null classloader before calling methods, if the
classloader is null it uses ClassLoader.getSystemResource or
ClassLoader.getSystemResourceAsStream
On Sat, Nov 6, 2010 at 2:04 PM, Phil Hagelberg
On Thu, Jun 30, 2011 at 8:39 AM, flebber flebber.c...@gmail.com wrote:
Just wanted to put a shout out to Russ Olsen to see what would be
needed to get a Russ Olsen book on clojure to happen. I am reading
design principles in Ruby and its a great read, I feel I am learning
much moe than just
Missed that one. Yeah, that's much nicer. -huahai
On Jun 29, 6:39 pm, Alan Malloy a...@malloys.org wrote:
(* daily (reduce * 1 coll))
;; is exactly equal to
(reduce * daily coll)
My point is you can start with daily instead of with 1, and thus not
have to special-case it in at the end.
On
Hi Alan
I really liked the way you kept refactoring the original solution by Huahai to
make it more and more logical and elegant. I verified that each refactored
function produced the correct results.
Thanks for sharing your valuable thoughts and techniques.
Shoeb
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