setting vars with macro
I'm working in a simple single-thread console-based rpg game in clojure (a port from my own scala version) and didn't want to use any concurrency structure because the game is single threaded. I was thinking about a macro like (defmacro set!! [s val] `(def ~s ~val)) so I can set my game state without using transactions, agents, etc. Any comments about it? Islon -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: setting vars with macro
Thanks for the answers. I realized the macro wasn't a good idea and I will keep using atoms to manage state, just found the reset! function =) Islon On May 17, 10:28 am, Michael Gardner wrote: > On May 15, 2010, at 4:56 PM, islon wrote: > > > I'm working in a simple single-thread console-based rpg game in > > clojure (a port from my own scala version) > > and didn't want to use any concurrency structure because the game is > > single threaded. > > I was thinking about a macro like > > > (defmacro set!! [s val] > > `(def ~s ~val)) > > > so I can set my game state without using transactions, agents, etc. > > Any comments about it? > > I wrote a Pong clone in Clojure just to stretch my mind a bit. Here's what I > do: > > The entire game world is a single struct-map (may become a record at some > point), stored in a global ref. When my world-update timer fires, I deref the > world and then pass it to my world-updater functions. These updaters return > the new world state, which I then set via ref-set. > > This is almost as simple as the usual global vars approach, and allowed me to > trivially split the world-drawing code into another thread that runs on a > different schedule. It also permits stuff like printing out or saving the > entire world state very easily. > > Actually, were it not for Swing, I wouldn't even be using mutable structures > at all-- I'd be passing the world state from update to update using > tail-recursion. > > You might also be interested in these links: > > http://nakkaya.com/2009/12/19/cloning-pong-part-1/(I originally based my Pong > game on this > code)http://jng.imagine27.com/articles/2009-09-12-122605_pong_in_clojure.html(cloning > Pong is apparently pretty > popular!)http://briancarper.net/blog/making-an-rpg-in-clojure-part-one-of-many(site > down at the moment)http://prog21.dadgum.com/23.html(not Clojure, but > interesting for functional games in general) > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with your > first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group > athttp://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Simlpe style question
You can write this function in clojure in the same style:
(defn move2ascii [move]
(let [f1 (/ move 100)
f2 (mod move 100)
row1 (int (inc (/ f1 8)))
row2 (int (inc (/ f2 8)))
col1 (char (+ (mod f1 8) 97))
col2 (char (+ (mod f2 8) 97))]
(str col1 row1 col2 row2)))
I don't think this is less idiomatic.
Just my 2¢.
Islon
On May 19, 8:56 am, edlich wrote:
> Dear Community,
>
> I have one question about readability. As I am not yet deep into
> Clojure I can only post scala but I am sure you will get my point.
>
> Recently I wrote the following dump function in Scala:
>
> // convert 1228 to "e2e4"
> def move2ascii(move: Int): String = { // Clojure Style
> (((move / 100) % 8 + 97).toChar).toString + ((move / 100) / 8 +
> 1).toString +
> (((move % 100) % 8 + 97).toChar).toString + ((move %
> 100) / 8 + 1).toString
> }
>
> but I could as well have written it like this in an imprative style:
> (both are equal)
>
> def move2ascii(move: Int): String = { // Scala Style
> val f1 = move / 100
> val f2 = move % 100
> val row1 = f1 / 8 + 1 // 2 von e2
> val row2 = f2 / 8 + 1 // 4 von e4
> val col1 = (f1 % 8 + 97).toChar // 5 = e von e2
> val col2 = (f2 % 8 + 97).toChar // 5 = e von e4
> col1.toString + row1.toString + col2.toString + row2.toString
> }
>
> I am sure if you write the first function in Clojure it would look
> nearly the same.
>
> My point and my question is:
>
> Isn't the second function easier to read? I know there had been a lot
> of threads about readability
> in clojure but I am not yet convinced.
> In the second version the brain can rely on some steps inbetween which
> make it more readable
> for me. Or should the first function be split up into several more
> functions to become more readable?
>
> I would be happy if you convince me to give Clojure a better chance.
>
> Thanks in advance
> Stefan Edlich
>
> P.S.: It's nice to see the upcoming Clojure book in Manning!
>
> --
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clojure date library
I missed a date/time API in clojure so I made one myself. Is it possible to put it in clojure.contrib? Sugestions, critics and improvements are welcome. -> http://www.copypastecode.com/29707/ Islon -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
primitive meta data
Hi.
I've made a dumb (very dumb) performance comparison function just to play
with the language.
I wanted to mark some symbols with a float primitive type but the compiler
complained so I had to annotate it with the Float class.
Here is the function:
(defn dumb-test []
(let [#^Float f2 567.09723]
(loop [#^Float f 1.8, i 1000]
(if (zero? i)
f
(recur (/ f f2) (dec i))
And the test:
(loop [i 50]
(time (dumb-test))
(if (zero? i)
i
(recur (dec i
There's a way to put a float primitive type in the metadata to prevent the
Float -> float unboxing?
Feel free to point some mistakes I probably made, I've just started learn
clojure.
The clojure version took an average: "Elapsed time: 217.833342 msecs" in my
machine.
The java version (below) took average 23 msecs:
private static float dumbTest() {
float f = 1.8f;
float f2 = 567.09723f;
for(int i = 0; i < 1000; i++) {
f /= f2;
}
return f;
}
Regards.
Islon
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Re: primitive meta data
Thanks for the advices. The unchecked version run as fast as java. Before I go solve some interesting problem I have to learn the language ;) Thanks anyway. On Wed, Oct 15, 2008 at 12:04 PM, Chouser <[EMAIL PROTECTED]> wrote: > > On Wed, Oct 15, 2008 at 7:08 AM, Parth Malwankar > <[EMAIL PROTECTED]> wrote: > > > > On Oct 15, 8:34 am, Islon <[EMAIL PROTECTED]> wrote: > >> > >> (defn dumb-test [] > >> (let [#^Float f2 567.09723] > >> (loop [#^Float f 1.8, i 1000] > >> (if (zero? i) > >> f > >> (recur (/ f f2) (dec i)) > > The type hints aren't really helping there, I think. #^Float might > help if you were calling a Java function and wanted to avoid the > runtime reflection lookup cost, but you're only calling Clojure > functions so it doesn't help. > > On my machine, about 180 msecs > > To get unboxed primitives, you have to do more like what Parth did: > > > (defn dumb-test [] > > (let [f2 (float 567.09723)] > >(loop [f (float 1.2), i (long 1000)] > > (if (zero? i) > >f > >(recur (/ f f2) (dec i)) > > On my machine that's 48 msecs. > > But we can do a bit better, just by using unchecked-dec: > > (defn dumb-test [] > (let [f2 (float 567.09723)] > (loop [f (float 1.2), i (long 1000)] > (if (zero? i) > f >(recur (/ f f2) (unchecked-dec i)) > > That's 24 msecs for me. > > But I don't know how useful these kinds of micro-benchmarks really > are. Clojure's "fast enough" so let's go solve some interesting > problems... > > --Chouser > > > > --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
remainder function
Is there a remainder (rest of the division) function in closure? (as java '%' operator). I browse the docs but couldn't find one. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: remainder function
Same problem for me. I didn't know there's a find-doc function, thanks! Regards On Wed, Oct 15, 2008 at 6:44 PM, Achim Passen <[EMAIL PROTECTED]>wrote: > > Hi, > > Am 15.10.2008 um 23:35 schrieb Islon: > > > Is there a remainder (rest of the division) function in closure? (as > > java '%' operator). > > I browse the docs but couldn't find one. > > clojure/rem > ([num div]) > rem[ainder] of dividing numerator by denominator. > > I ran into the same problem some time ago - find-doc/searching for > "remainder" doesn't work here, for obvious reasons. Maybe it's a good > idea to change the doc string? > > Kind regards, > achim > > > > --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: offtopic - where are you come from? (poll)
Islon Scherer from Brazil :) On Fri, Oct 17, 2008 at 9:52 AM, Randall R Schulz <[EMAIL PROTECTED]> wrote: > > On Friday 17 October 2008 02:27, Rastislav Kassak wrote: > > Hello Clojurians, > > > > I think after 1st year of Clojure life it's good to check how far has > > Clojure spread all over the world. > > > > So wherever are you come from, be proud and say it. > > Silicon Valley. > > > > I'm from Slovakia. :) > > > > RK > > > RRS > > > > --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
string interpolation
Is there any chance closure will get string interpolation?
Do things like (prn "Hi ${someone}, my name is ${myname}") is nice, not
crucial of course, but nice.
Islon
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Re: string interpolation
Thanks for the macro. =)
The str function is really a good replacement for interpolation.
On Oct 28, 8:29 pm, "Graham Fawcett" <[EMAIL PROTECTED]> wrote:
> On Tue, Oct 28, 2008 at 7:27 PM, Graham Fawcett
>
> <[EMAIL PROTECTED]> wrote:
> > But for fun, here's an (i ...) macro, that will give you ${}
> > interpolation in strings (if it works at all, I test it very
> > thorougly!).
>
> Haha, nor did I spell- or grammar-check very thoroughly!
>
> I meant: I didn't test the code very thoroughly, so I hope it works at all.
>
> Graham
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Re: Changes for AOT compilation
These are great changes!! I see a bright future ahead. Thanks Rich. On 14 nov, 11:53, MikeM <[EMAIL PROTECTED]> wrote: > > Just lift your files up a directory to accommodate this change. Note > > that this implies that all namespaces should have at least 2 segments, > > and following the Java package name guidelines, e.g. > > com.mydomain.mylib, is recommended. > > I notice that the user namespace is still one segment "user". Will > this remain a one-segment namespace or be changed to two segments at > some point? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: Just Wondering: Tag metadata
There's no way to check types at compile time? (defn len2 [#^String x] (. x (length))) (defn wrong [] (len2 10)) Would be good if you could find such errors at compile time. Optional static typing =) Regards. Islon On 12 nov, 21:43, Rich Hickey <[EMAIL PROTECTED]> wrote: > On Nov 12, 7:21 pm, samppi <[EMAIL PROTECTED]> wrote: > > > Ah, yes. I meant, what are these hints? What does the compiler change? > > Is it some sort of informal type enforcement or something? > > The hints are described here: > > http://clojure.org/java_interop#typehints > > It is strictly a performance optimization so calls to Java can avoid > reflection. There is no compile-time enforcement. > > Rich --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
clojure slime
I checkouted the last clojure from svn, swank-clojure and clojure-mode too. When I start slime it give me the following errors: Clojure user=> (add-classpath "file:////home/islon/opt/swank-clojure/") nil user=> (require (quote swank)) java.lang.Exception: No such var: swank.util/gen-and-load-class (core.clj:39) user=> (swank/ignore-protocol-version "2008-11-02") java.lang.Exception: No such var: swank/ignore-protocol-version (NO_SOURCE_FILE:5) user=> (swank/start-server "/tmp/slime.22694" :encoding "iso-latin-1-unix") java.lang.Exception: No such var: swank/start-server (NO_SOURCE_FILE: 7) user=> It worked until I update clojure from svn. Any ideas? Regards. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: strings
(defn string-reverse [s] (reduce #(str %1 " " %2) (reverse (seq (. s (split " ")) You're probably looking for something like this =) On Nov 18, 9:00 pm, joejoe <[EMAIL PROTECTED]> wrote: > hello all, > so I'm not only new to this group but I am new to Clojure. I may be > going about this all wrong but here's what I got. I want to simply > take a string and reverse it, ex: "I am cold" would become "cold am > I" (haha I just realized that's probably how yoda would say it). So > for now I am hard coding my string, so "myString" ="I am cold". > > How I am thinking of doing this is as follows: > > (loop [i 0] > (when (< i (count myString)) > //missing code > // > // > (recur (inc i > > so this probably isn't a hard thing to do but like I said I am new to > this all. I basically need to figure out a way to print each element > of myString one at a time, this would allow me to figure out how to > reverse it. > > so to my simple question, is it possible it print each element of a > string independently? > > I know about (first myString), which will give me I printed out three > times. So it seems there has to be a way and I just can't seem to > figure it out. > > thanks for any input! > > -joejoe --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: strings
It doesn't work: (apply str (reverse "i am cold")) "dloc ma i" The correct output is "cold am i". You must reverse words not letters. On Nov 18, 11:33 pm, "Kevin Downey" <[EMAIL PROTECTED]> wrote: > (apply str (reverse "I am cold")) > > shorter and it does the same thing. no need to take out the spaces and > put them back in > > On Tue, Nov 18, 2008 at 5:21 PM, Mark Volkmann > > > > <[EMAIL PROTECTED]> wrote: > > > Here's another solution that came from help on the chat. Thanks Chouser! > > > (apply str (interpose " " (reverse (.split "I am cold" " " > > > On Tue, Nov 18, 2008 at 7:15 PM, islon <[EMAIL PROTECTED]> wrote: > > >> (defn string-reverse [s] > >> (reduce #(str %1 " " %2) (reverse (seq (. s (split " ")) > > >> You're probably looking for something like this =) > > >> On Nov 18, 9:00 pm, joejoe <[EMAIL PROTECTED]> wrote: > >>> hello all, > >>> so I'm not only new to this group but I am new to Clojure. I may be > >>> going about this all wrong but here's what I got. I want to simply > >>> take a string and reverse it, ex: "I am cold" would become "cold am > >>> I" (haha I just realized that's probably how yoda would say it). So > >>> for now I am hard coding my string, so "myString" ="I am cold". > > >>> How I am thinking of doing this is as follows: > > >>> (loop [i 0] > >>> (when (< i (count myString)) > >>> //missing code > >>> // > >>> // > >>> (recur (inc i > > >>> so this probably isn't a hard thing to do but like I said I am new to > >>> this all. I basically need to figure out a way to print each element > >>> of myString one at a time, this would allow me to figure out how to > >>> reverse it. > > >>> so to my simple question, is it possible it print each element of a > >>> string independently? > > >>> I know about (first myString), which will give me I printed out three > >>> times. So it seems there has to be a way and I just can't seem to > >>> figure it out. > > >>> thanks for any input! > > >>> -joejoe > > > -- > > R. Mark Volkmann > > Object Computing, Inc. > > -- > The Mafia way is that we pursue larger goals under the guise of > personal relationships. > Fisheye --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: clojure slime
I'll not use slime right now (thanks Bill). swank-clojure will be fixed anytime soon? On Nov 18, 11:15 pm, "Stephen C. Gilardi" <[EMAIL PROTECTED]> wrote: > SVN version 1110 of Clojure made a breaking change to a feature that > swank-clojure is using. For now, I recommend moving back one rev by > using: > > svn up -r 1109 > > from within your checkout of clojure/trunk. > > In the past, Jeff has updated swank-clojure very quickly on those rare > occasions where Clojure changes enough to break it. Stay tuned. > > --Steve > > On Nov 18, 2008, at 8:01 PM, islon wrote: > > > > > I checkouted the last clojure from svn, swank-clojure and clojure-mode > > too. > > When I start slime it give me the following errors: > > > Clojure > > user=> (add-classpath "file:home/islon/opt/swank-clojure/") > > nil > > user=> > > (require (quote swank)) > > java.lang.Exception: No such var: swank.util/gen-and-load-class > > (core.clj:39) > > user=> > > (swank/ignore-protocol-version "2008-11-02") > > java.lang.Exception: No such var: swank/ignore-protocol-version > > (NO_SOURCE_FILE:5) > > user=> > > (swank/start-server "/tmp/slime.22694" :encoding "iso-latin-1-unix") > > java.lang.Exception: No such var: swank/start-server (NO_SOURCE_FILE: > > 7) > > user=> > > > It worked until I update clojure from svn. > > Any ideas? > > > Regards. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
mutability
I'm porting my single thread simple mud-like rpg game from scala to clojure and one thing that is annoying me is the code needed to change some var. In scala I do things like that: val player = new Player(...) player.str += 1 in clojure I have to do (player is a struct and its attributes are refs): (def player (Player ...)) (dosync (ref-set player (assoc player :str (inc (:str player) In scala when I want mutability I just define the variable with "var" instead of "val", just one letter, simple and elegant. It's a game, it's full of states and mutability, the game is single thread, I don't need transactions. Am I missing something? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: mutability
Thanks Chouser.
Just to clarify some points:
I'm not saying scala ir better than clojure or clojure is bad or
immutability is a bad thing, and I know that a true game is
multithread (I'm a game programmer).
Clojure forces you to program in a thread safe way and it's a good
thing when you are doing multithread, but if you are a 100% sure that
your program is singlethreaded and will never
be multithread it's annoying all the ceremony to set a variable.
I don't think scala ir error prone to threading errors because the use
of vals is recommended, I only use vars when strictly needed, but that
is just my opinion.
I miss some easy way to do mutability and object orientation, but
otherwise clojure is great =)
Islon
On 20 nov, 17:38, Chouser <[EMAIL PROTECTED]> wrote:
> On Thu, Nov 20, 2008 at 3:23 PM, islon <[EMAIL PROTECTED]> wrote:
>
> > in clojure I have to do (player is a struct and its attributes are
> > refs):
>
> > (def player (Player ...))
>
> > (dosync (ref-set player (assoc player :str (inc (:str player)
>
> Assuming you meant:
> (def player (ref {:str 55}))
> (dosync (ref-set player (assoc @player :str (inc (:str @player)
>
> This could be written:
> (dosync (commute player update-in [:str] inc))
>
> This is somewhat shorter, but also handles more deeply-nested structures
> easily.
>
> > In scala when I want mutability I just define the variable with "var"
> > instead of "val", just one letter, simple and elegant.
>
> Simple, perhaps, but very much prone to the kind of threading issues
> that Clojure is designed to solve. You may say today that the game is
> single-threaded, but if you ever change your mind Clojure will have
> helped you structure your code well already -- in Java or Scala you'll
> be in for some trouble.
>
> Work to reduce how often you modify the state, using more functional
> style until you have exactly the player object you want, and then do a
> single commute or alter. You should find you don't need to alter
> state in as many places as you would in other languages, and when you
> do it's easier to do it in a thread-safe way.
>
> --Chouser
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Re: mutability
Thanks for the ideas =)
I'll use agents to represent state (I don't know how I forgot it,
thanks Harrison), they are a lot more concise than refs and make a lot
more sense in my context.
Only one problem:
user=> (def player (agent {:str 2 :dex 3}))
#=(var user/player)
user=> @player
{:str 2, :dex 3}
user=> (send (:str player) + 1)
java.lang.NullPointerException (NO_SOURCE_FILE:0)
...
Caused by: java.lang.NullPointerException
at clojure.send__547.doInvoke(boot.clj:1044)
at clojure.lang.RestFn.invoke(RestFn.java:445)
at user.eval__2681.invoke(Unknown Source)
at clojure.lang.Compiler.eval(Compiler.java:4106)
... 10 more
Ideas?
Regards.
Islon
On Nov 20, 9:24 pm, Timothy Pratley <[EMAIL PROTECTED]> wrote:
> Given that is the correct way to mutate state, why do we need so much
> explicit syntax?
> user=> (defn += [a b c] (dosync (commute a update-in [b] #(+ c %1
>
> user=> (+= player :str 1)
> {:str 56}
> ; are you a giant?
>
> Ok so if I did something like this:
> (+= player :int 5)
> (+= player :hpmax 10)
> in one thread, and on another thread did:
> (myset player :int 10)
> (myset player :hpmax 88)
>
> The operations might be interleaved whereas it might be desirable to
> do the 2 update actions in one transaction to prevent interleaving.
> Now this is really up to the programmer as to what is desired, however
> a group update is pretty trivial also:
> (myset player :int 10 :hpmax 88)
>
> Maybe there is the case where something more complex happens which I
> can't imagine and you would still need dosync... but it seems to me
> that the majority of occurrences could be hidden away by simple
> mutation functions, and these could be written much more generically
> than the one above.
> Is there an inherent problem with this approach?
>
> Regards,
> Tim.
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Re: mutability
I gave up, the resulting code would be a lot more complex than the
scala version.
But thanks for your advices.
If anyone wants to port it I can send the source code, it's ~1000
lines total.
Islon
On Nov 20, 11:38 pm, harrison clarke <[EMAIL PROTECTED]> wrote:
> i was thinking that each stat would be an agent.
> whatever boats your float, i guess. i'm probably not the person to go
> to about idiomatic code. :V
>
> user> (let [player {:str (agent 5)
> :dex (agent 5)}
> str (:str player)
> dex (:dex player)]
> (println @str @dex)
> (send str + 1)
> (send dex * 2)
> (println @str @dex)
> (await str dex)
> (println @str @dex))
> 5 5
> 5 5
> 6 10
> nil
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Re: mutability
There's no problem with clojure, the problem is with me: I'm a complete noob in clojure programming =) That's why I asked if anyone wanted to port the game. I'll probably learn more reading someone's idiomatic code than my own bad code. I started this project to learn scala so the final code could probably be done in less than 1000 LOC. Later today I'll commit the code to github and send the link. > Even if you have to make every > modification inside a dosync using the syntax that you originally > provided, why not write a function that captures that and be done with > it? Or, if you have to, a macro? Because: 1 - there's lot of different states with different semantics and collections, this function/macro would need to be generic and thus take a lot of parameters. 2 - I could made one function to each statefull data structure, anyway would be a lot of code compared to the scala one-liner. 3 - maybe I'm mising something... > Sure, I'd be interested in porting it, would give me a reason to learn > Scala :). The code is simple (except for the generate map algorithm) if you know java and OO =) I don't know if the clojure version will be much more concise than the scala version. Scala is the most "low ceremony" language i found, even more than ruby, but idiomatic clojure is probably more, I think. Regards. Islon On 21 nov, 02:41, Timothy Pratley <[EMAIL PROTECTED]> wrote: > > Step right up folks and place your bet. > > Depends on the implementer, Chouser can do it in 95 LOC --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: mutability
I added the project in google code (github kept complaining about my public key) http://code.google.com/p/randomrpg/ I reduced the LOC to ~900. I'll try once more to port it to clojure (thanks for the macro Adam), but don't know when i'll be done. Regards. Islon On Nov 21, 4:27 pm, Adam Jones <[EMAIL PROTECTED]> wrote: > On Nov 20, 12:23 pm, islon <[EMAIL PROTECTED]> wrote: > > > > > I'm porting my single thread simple mud-like rpg game from scala to > > clojure and one thing that is annoying me is the code needed to change > > some var. > > In scala I do things like that: > > > val player = new Player(...) > > > player.str += 1 > > > in clojure I have to do (player is a struct and its attributes are > > refs): > > > (def player (Player ...)) > > > (dosync (ref-set player (assoc player :str (inc (:str player) > > > In scala when I want mutability I just define the variable with "var" > > instead of "val", just one letter, simple and elegant. > > It's a game, it's full of states and mutability, the game is single > > thread, I don't need transactions. Am I missing something? > > If this is really that big of a deal, you could always go the macro > route. I'm not experienced enough to say if this is a long-term good > decision, but here's a first pass, don't even have Clojure available > to try it, attempt at wrapping up Chouser's suggestion (I think := > would be better here, but that clashes with keyword definition): > > (defmacro |= [target attr fun] > "Updates 'attr' of 'target' by passing the current value to 'fun' > and commuting the result, all inside of a transaction" > `(dosync > (commute ~target update-in [~attr] ~fun))) > > With usage: > > (|= player :str inc) > > That look a little better? > > -Adam --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: Eclipse Plugin- any plans for this?
Is the plugin usable right now? On Nov 22, 8:53 am, lpetit <[EMAIL PROTECTED]> wrote: > Well, I'm also on board on the clojuredev team since yesterday, > > Take a look at the roadmap list (which currently is more a feature > wishlist than a prioritized list), and please help completing it, and > give us feedback on what you think your priorities would be, > > -- > Laurent > > On Nov 21, 5:25 pm, verec <[EMAIL PROTECTED]> > wrote: > > > I'm still active on this, as I'm sure Casey is. Though the recent crop > > of incompatible changes means some rework as the target is moving :) > > -- > > JFB > > > On Nov 21, 1:03 pm, MikeM <[EMAIL PROTECTED]> wrote: > > > > This came up on the list not long ago, don't know what the status is: > > > >http://code.google.com/p/clojure-dev/ > > --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: clojure date library
Thanks for the link. I wasn't aware of this library. Islon On May 24, 3:10 pm, David Nolen wrote: > On Mon, May 24, 2010 at 1:53 PM, islon wrote: > > I missed a date/time API in clojure so I made one myself. > > Is it possible to put it in clojure.contrib? > > Sugestions, critics and improvements are welcome. > > > ->http://www.copypastecode.com/29707/ > > > Islon > > Have you looked at clj-time?http://github.com/clj-sys/clj-time > > David > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with your > first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group > athttp://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Functions that return seqs
One things that always bugged me about clojure is that most functions that work on collections return seqs and not the original data structure type: (= [2 4 6] (-> [2 [4]] flatten (conj 6))) => false Every time I transform collections I need to be aware of this. My questions is: is there a philosophical reason for that or it was implement this way because it's easier? Why conj is different? Doesn't it break the principle of least surprise? Thanks, Islon -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Functions that return seqs
Thanks for all the answers. Agreed that sequences are a great abstraction (100 functions in 1 data structure instead of 10 to 10) and, as David said, there's value in having the return type to be predictable. I think a 'generics collection functions' library would be nice for those edge cases you want those functions to be generic. I guess the philosophical reason is that 'concrete types don't > really matter'... Well, maybe most of the time, but there's cases where the concrete type semantics matters a lot, specially with sets but sometimes with vectors too, right now i'm using into or just calling vec|set or reducers library but maybe I'll try to implement this generics library I just talk about as it's really easy to do that in clojure =) Islon -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Multiple REPLs in Emacs? (was: test run startup time
Here at doo we have a shortcut "C-c X" where X is a number to change between nrepls. The code is in https://github.com/maxweber/emacs.d/blob/master/my/nrepl.el Note that the nrepl ports are hardcoded but it's good enough for us. Hope this helps. -- Islon On Thursday, July 11, 2013 11:53:31 PM UTC+2, Sean Corfield wrote: > > On Wed, Jul 10, 2013 at 10:53 AM, Jay Fields > > > wrote: > > I work in emacs with 2 repls running - 1 for running my app and 1 for > > running my tests. > > What is the magic to get this working and how does Emacs / nrepl.el > know which REPL to send commands to? > > I've often wanted multiple active REPLs (usually for working with > multiple projects) but have never figured out how to get it working... > -- > Sean A Corfield -- (904) 302-SEAN > An Architect's View -- http://corfield.org/ > World Singles, LLC. -- http://worldsingles.com/ > > "Perfection is the enemy of the good." > -- Gustave Flaubert, French realist novelist (1821-1880) > -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
wally: a alternative way to discover functions
Hey guys,
I don't know about you but when I was a beginner in Clojure (and it still
happens every now and then) I had a hard time finding functions using `doc`
or `find-doc`,
normally because I didn't remember the name of the function or because my
only clue was a generic name so find-doc would return too much results. But
one
thing I knew: what to expect of the function, I knew the inputs and the
outputs. That's why I decided to create wally, because sometimes you don't
know the name of the function you want but you know how it should behave.
With wally you can tell the inputs and the output and it'll search for
functions that match those inputs/outputs.
Ex:
user=> (find-by-sample {1 1, 2 3, 3 1, 4 2} [1 2 3 4 4 2
2])-clojure.core/frequencies([coll])
> Returns a map from distinct items in coll to the number of times
> they appear.
>
>
user=> (find-by-sample '((1 2 3) (4 5)) (partial < 3) [1 2 3 4 5])
> -
> clojure.core/partition-by
> ([f coll])
> Applies f to each value in coll, splitting it each time f returns
>a new value. Returns a lazy seq of partitions.
>
https://github.com/stackoverflow/wally
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Re: wally: a alternative way to discover functions
Mayank: thanks!
Shaun: I thought about approximations too but that's enough complexity to
be another library by itself.
If there's such a library that I can feed two values and it returns how
similar they are with some percentage I would gladly integrate it with
wally.
Of course wally only works for referential transparent/pure functions but
that's the majority of Clojure functions anyway =)
On Friday, September 6, 2013 6:44:43 AM UTC+2, Shaun Gilchrist wrote:
>
> Very cool! I wonder how hard it would be to have it suggest compositions
> if it can not find a direct match?
>
>
> On Thu, Sep 5, 2013 at 10:34 PM, Mayank Jain
> > wrote:
>
>> Looks pretty interesting. Thanks for sharing
>>
>>
>> On Fri, Sep 6, 2013 at 2:53 AM, Islon Scherer
>>
>> > wrote:
>>
>>> Hey guys,
>>>
>>> I don't know about you but when I was a beginner in Clojure (and it
>>> still happens every now and then) I had a hard time finding functions using
>>> `doc` or `find-doc`,
>>> normally because I didn't remember the name of the function or because
>>> my only clue was a generic name so find-doc would return too much results.
>>> But one
>>> thing I knew: what to expect of the function, I knew the inputs and the
>>> outputs. That's why I decided to create wally, because sometimes you don't
>>> know the name of the function you want but you know how it should behave.
>>>
>>> With wally you can tell the inputs and the output and it'll search for
>>> functions that match those inputs/outputs.
>>>
>>> Ex:
>>>
>>> user=> (find-by-sample {1 1, 2 3, 3 1, 4 2} [1 2 3 4 4 2
>>> 2])-clojure.core/frequencies([coll])
>>>> Returns a map from distinct items in coll to the number of times
>>>> they appear.
>>>>
>>>>
>>> user=> (find-by-sample '((1 2 3) (4 5)) (partial < 3) [1 2 3 4 5])
>>>> -
>>>> clojure.core/partition-by
>>>> ([f coll])
>>>> Applies f to each value in coll, splitting it each time f returns
>>>>a new value. Returns a lazy seq of partitions.
>>>>
>>>
>>> https://github.com/stackoverflow/wally
>>>
>>> --
>>> --
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>>> your first post.
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>>>
>>
>>
>>
>> --
>> Regards,
>> Mayank.
>>
>> --
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>
>
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Re: wally: a alternative way to discover functions
Thanks for the gist, nice solution but it's not viable for real world code
without some heavy filtering. If I execute it on my current project it
starts a server, sends a bunch of emails and hangs forever =)
On Friday, September 6, 2013 2:12:29 PM UTC+2, Frantisek Sodomka wrote:
>
> Hello,
> this gist does the similar thing:
> https://gist.github.com/jaked/6084411
>
> Maybe you can find some inspiration in it.
>
> Frantisek
>
>
> On Thursday, September 5, 2013 11:23:28 PM UTC+2, Islon Scherer wrote:
>>
>> Hey guys,
>>
>> I don't know about you but when I was a beginner in Clojure (and it still
>> happens every now and then) I had a hard time finding functions using `doc`
>> or `find-doc`,
>> normally because I didn't remember the name of the function or because my
>> only clue was a generic name so find-doc would return too much results. But
>> one
>> thing I knew: what to expect of the function, I knew the inputs and the
>> outputs. That's why I decided to create wally, because sometimes you don't
>> know the name of the function you want but you know how it should behave.
>>
>> With wally you can tell the inputs and the output and it'll search for
>> functions that match those inputs/outputs.
>>
>> Ex:
>>
>> user=> (find-by-sample {1 1, 2 3, 3 1, 4 2} [1 2 3 4 4 2
>> 2])-clojure.core/frequencies([coll])
>>> Returns a map from distinct items in coll to the number of times
>>> they appear.
>>>
>>>
>> user=> (find-by-sample '((1 2 3) (4 5)) (partial < 3) [1 2 3 4 5])
>>> -
>>> clojure.core/partition-by
>>> ([f coll])
>>> Applies f to each value in coll, splitting it each time f returns
>>>a new value. Returns a lazy seq of partitions.
>>>
>>
>> https://github.com/stackoverflow/wally
>>
>
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Re: wally: a alternative way to discover functions
>
> I wonder if it would be possible to improve it using the core.typed
> library and doing some kind of static analysis similar to Haskell's Hoogle
> to filter out candidates.
>
The problem is most Clojure functions don't use core.type nor are type
annotated.
It would be nice if pure functions had some metadata like :pure true. =)
On Saturday, September 7, 2013 1:53:08 AM UTC+2, Chris-tina Whyte wrote:
>
> Interesting!
>
> Though it executes every function in order to find the matches, which is a
> little bit dangerous as Clojure doesn't enforce purity :(
>
> I wonder if it would be possible to improve it using the core.typed
> library and doing some kind of static analysis similar to Haskell's Hoogle
> to filter out candidates.
>
> On Thursday, September 5, 2013 6:23:28 PM UTC-3, Islon Scherer wrote:
>>
>> Hey guys,
>>
>> I don't know about you but when I was a beginner in Clojure (and it still
>> happens every now and then) I had a hard time finding functions using `doc`
>> or `find-doc`,
>> normally because I didn't remember the name of the function or because my
>> only clue was a generic name so find-doc would return too much results. But
>> one
>> thing I knew: what to expect of the function, I knew the inputs and the
>> outputs. That's why I decided to create wally, because sometimes you don't
>> know the name of the function you want but you know how it should behave.
>>
>> With wally you can tell the inputs and the output and it'll search for
>> functions that match those inputs/outputs.
>>
>> Ex:
>>
>> user=> (find-by-sample {1 1, 2 3, 3 1, 4 2} [1 2 3 4 4 2
>> 2])-clojure.core/frequencies([coll])
>>> Returns a map from distinct items in coll to the number of times
>>> they appear.
>>>
>>>
>> user=> (find-by-sample '((1 2 3) (4 5)) (partial < 3) [1 2 3 4 5])
>>> -
>>> clojure.core/partition-by
>>> ([f coll])
>>> Applies f to each value in coll, splitting it each time f returns
>>>a new value. Returns a lazy seq of partitions.
>>>
>>
>> https://github.com/stackoverflow/wally
>>
>
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Re: wally: a alternative way to discover functions
Florian: I filter out all functions that end with ! but I can't know for
sure which functions have side effects.
On Sunday, September 8, 2013 7:24:48 AM UTC+2, Florian Over wrote:
>
> Hi,
> you could check for io! to find forms with side-effect, but i think it is
> seldom used.
> Florian
>
> http://clojuredocs.org/clojure_core/clojure.core/io!
>
>
> 2013/9/8 Maximilien Rzepka >
>
>> Found many times apropos useful...
>> user> (apropos "partition")
>> (partition-by partition-all partition)
>>
>> But wally approach is really cool.
>> Thanks for sharing
>> @maxrzepka
>>
>> Le jeudi 5 septembre 2013 23:23:28 UTC+2, Islon Scherer a écrit :
>>
>>> Hey guys,
>>>
>>> I don't know about you but when I was a beginner in Clojure (and it
>>> still happens every now and then) I had a hard time finding functions using
>>> `doc` or `find-doc`,
>>> normally because I didn't remember the name of the function or because
>>> my only clue was a generic name so find-doc would return too much results.
>>> But one
>>> thing I knew: what to expect of the function, I knew the inputs and the
>>> outputs. That's why I decided to create wally, because sometimes you don't
>>> know the name of the function you want but you know how it should behave.
>>>
>>> With wally you can tell the inputs and the output and it'll search for
>>> functions that match those inputs/outputs.
>>>
>>> Ex:
>>>
>>> user=> (find-by-sample {1 1, 2 3, 3 1, 4 2} [1 2 3 4 4 2
>>> 2])-clojure.core/frequencies([coll])
>>>> Returns a map from distinct items in coll to the number of times
>>>> they appear.
>>>>
>>>>
>>> user=> (find-by-sample '((1 2 3) (4 5)) (partial < 3) [1 2 3 4 5])
>>>> -
>>>> clojure.core/partition-by
>>>> ([f coll])
>>>> Applies f to each value in coll, splitting it each time f returns
>>>>a new value. Returns a lazy seq of partitions.
>>>>
>>>
>>>
>>> https://github.com/**stackoverflow/wally<https://github.com/stackoverflow/wally>
>>>
>> --
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Re: Is Korma still a good current choice for DB backend?
Sean, that was exactly what we did when we changed to yesql. With separated queries our Postgres specialist could optimize each query separately, and for the if nesting we used cond or core.match. Even with all the boilerplate of maintaining separated queries it was still much better than Korma limited DSL. How much better yesql was compared to raw clojure.java.jdbc was an open question though. On Wednesday, July 23, 2014 4:35:14 AM UTC+2, Sean Corfield wrote: > > I'm curious as to how folks using Yesql deal with conditional queries - > which is something we seem to run into a lot. > > For example, we have some business logic that might optionally be passed a > date range and maybe some other qualifier so our query would be: > > (str "SELECT ... main query stuff WHERE basic conditions" > (when date-range (str " AND dateUpdated >= ? AND dateUpdated < ?")) > (when qualifier " AND someColumn = ?")) > > and then some conditions to build the parameters: > > (cond-> basic-params > date-range (concat date-range) > qualifier (concat [qualifier])) > > It seems like with Yesql we'd have to have four different query functions > and then code like this: > > (if date-range > (if qualifier > (query-with-date-range-and-qualifier db basic params (first date-range) > (second date-range) qualifier) > (query-with-date-range db basic params (first date-range) (second > date-range))) > (if qualifier > (query-with-qualifier db basic params qualifier) > (query-basic db basic params))) > > Sean > > On Jul 22, 2014, at 6:08 AM, Timothy Baldridge > wrote: > > Also, read the rationale behint yesql: > https://github.com/krisajenkins/yesql IMO, it hits the nail on the head. > ORMs are both crappy object systems and crappy DB DSLs. With a library like > yesql you write your queries in pure SQL and get pure data back. Now you > can fully leverage both SQL and Clojure. > > > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Write/reading java maps and lists using fressian/transit
Hi, I have a program I wrote who needs to serialize java HashMaps and ArrayLists to and from disk but AFAIK (and after some simple tests) it seems fressian writes those maps/lists correctly but read them back as clojure maps and lists (persistent). Is there a way to tell fressian (could be transit too) to read them back as java maps/lists? Just for some context, it's a huge amount of data and it should be serialized in binary format/non-human readable way for performance and space considerations. All the data is composed of simple types (maps, lists, strings, numbers, keywords only. No complex objects) I'm thinking about maybe just using some java serialization library if fressian/transit doesn't support that. Thanks in advance. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Write/reading java maps and lists using fressian/transit
Ok, I got it. Instead of using transit-clj I can user the java library directly. The reader automatically returns ArrayList and HashMap. Great! On Thursday, August 7, 2014 8:11:50 PM UTC+2, Thomas Heller wrote: > > Both Transit and fressian take a Handler map as arguments to the > reader/writer functions/constructors. So its pretty straightforward to > replace the default handlers with handlers that do what you want. > > I have no example handy but it should be documented in both libraries. > Transit has something called mapBuilder, not sure about fressian. > > HTH, > /thomas > > On Thursday, August 7, 2014 2:48:20 PM UTC+2, Islon Scherer wrote: >> >> Hi, >> >> I have a program I wrote who needs to serialize java HashMaps and >> ArrayLists to and from disk but AFAIK (and after some simple tests) it >> seems fressian writes those maps/lists correctly but read them back as >> clojure maps and lists (persistent). >> Is there a way to tell fressian (could be transit too) to read them back >> as java maps/lists? >> Just for some context, it's a huge amount of data and it should be >> serialized in binary format/non-human readable way for performance and >> space considerations. All the data is composed of simple types (maps, >> lists, strings, numbers, keywords only. No complex objects) >> I'm thinking about maybe just using some java serialization library if >> fressian/transit doesn't support that. >> >> Thanks in advance. >> > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Latest web framework for clojure
If you are learning go with a simple approach (compojure + http-kit + hiccup for example). If you already know clojure I recommend going with some library that provide everything as data, specially the routes, as the function composition approach of compojure only gets you so far (been there). On Friday, February 28, 2014 12:05:08 PM UTC+1, xavi wrote: > > I would recommend this combination of libraries: > > - Compojure > - lib-noir > - Enlive and Enfocus, for server-side and client-side templating > respectively (I've also used Hiccup, but I prefer Enlive/Enfocus because > with these, templates are pure HTML; I prefer them even for solo projects, > but I would especially recommend them if the HTML/CSS is going to be > written by people that don't necessarily know anything about > Clojure/ClojureScript). > - CongoMongo, if you're using MongoDB as a database (there's also Monger, > but I don't have any experience with it) > > Some time ago I open-sourced a base web, with a complete authentication > system, that used these libraries. Maybe you'll find it useful > https://github.com/xavi/noir-auth-app > > Cheers, > Xavi > > On Thursday, February 27, 2014 2:57:07 AM UTC+1, Moritz Ulrich wrote: >> >> Om is well-suited to handle the UI-part for you. It doesn't do any >> server communication or forces you into any particular programming >> style or project layout. >> >> On Thu, Feb 27, 2014 at 2:35 AM, Mark Engelberg >> wrote: >> > As far as I can tell, neither luminus nor caribou are well-suited to >> > building, for example, interactive "web apps" like this web-based chat >> room >> > which serves as the "Hello World" for the Opa web framework: >> > https://github.com/MLstate/opalang/wiki/Hello%2C-chat >> > >> > Is this the kind of thing that Pedestal and Hoplon are meant for? Or >> Om? >> > >> > -- >> > You received this message because you are subscribed to the Google >> > Groups "Clojure" group. >> > To post to this group, send email to clo...@googlegroups.com >> > Note that posts from new members are moderated - please be patient with >> your >> > first post. >> > To unsubscribe from this group, send email to >> > clojure+u...@googlegroups.com >> > For more options, visit this group at >> > http://groups.google.com/group/clojure?hl=en >> > --- >> > You received this message because you are subscribed to the Google >> Groups >> > "Clojure" group. >> > To unsubscribe from this group and stop receiving emails from it, send >> an >> > email to clojure+u...@googlegroups.com. >> > For more options, visit https://groups.google.com/groups/opt_out. >> > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Meta-eX - The Music of Code
Overtone is amazing, I'm planning on doing some experiments with it as soon as I finish the supercollider book and improve my music theory skills. On Friday, April 11, 2014 4:44:22 PM UTC+2, Sam Aaron wrote: > > > On 10 Apr 2014, at 03:18, Earl Jenkins > > wrote: > > > Good stuff, all the hard work you've done in the field of live coding, > yet no mention of Meta-ex nor clojure in the Computer Music Journal which > has a whole issue dedicated to this subject ;( > > To be honest, Overtone was never targeted at academics. It was built for > Clojure hackers to be able to use their programming skills to realise their > musical ideas. As such, it's gained a lot of traction with progressional > programmers. > > I'm continuously amazed with what people are doing with Overtone - > stretching it in incredible ways. However, I feel that the best is still > yet to come. Now is a fantastic time to get involved... > > Sam > > --- > http://sam.aaron.name -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: Do web apps need Clojure?
For me it's about 1 thing: Data. A web application is about taking data from the user, transform it and store it on the database and take data from the database, transform it and show it to the user. Clojure is the best language I used to work with data, it just gives you a composable set of tools and then get out of your way, and there's always macros for the more complex use cases. We have a web application that serves edn data to our clojurescript frontend, our webdevelopers created a new site for mobile in backbone.js that used json, I had just to create a function (ring middleware) that transformed my edn data to json based on the accept header. My 2¢ On Thursday, November 14, 2013 9:11:04 AM UTC+1, Bastien Guerry wrote: > > Marcus Blankenship > writes: > > > Brian, that’s really interesting. I think we’re seeing something > > similar, and are going to look at Pedestal and Caribou as options for > > a project we’re working on. Are their others we should consider? > > Perhaps you should consider starting from scratch, in parallel. > > Maybe that's because I'm a beginner in both the language and in web > development, but so far I've found it's the best way to understand the > choices behind framaworks. Otherwise I would confuse "web development" > with those choices, and I feel the richness of the Clojure ecosystem > is precisely to open your mind about "web development". > > 2 cents, > > -- > Bastien > -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: ClojureDocs.org
Hi. Does clojuredocs expose any external API (json, xml... rest, webservices, etc) so I can access the docs from my code? Islon On Jul 13, 11:40 pm, j-g-faustus wrote: > On Jul 13, 8:37 pm, Paul Moore wrote: > > > Can I suggest omitting the "Table of contents" sidebar when printing? > > I've not tried printing the document to see how it looks, but removing > > the sidebar would be an essential starting point... > > Why would anyone want to print it? > > I occasionally print longer texts like specifications, but for > reference material like Javadoc,ClojureDocs, the Ruby cheat sheet and > this page, I think HTML is a far superior format due to links and > browser search. > And 40+ loose single sheets is a rather cumbersome package unless you > have access to a book binder. > > But if at least two people feel that they would really like to print > it out, I can skip the TOC on print. > > (Making it look _nice_ on paper is a whole different ballgame, then > I'd have to look into pagination and page layouts, perhaps by > converting to DocBook or LaTex. That's outside the scope of what I > intended to do.) > > On Jul 13, 10:04 pm, Meikel Brandmeyer wrote: > > > Some comments after quickly skimming through: > > ... > > PS: I'm apologise if some this seems to be nit-picking. > > Not at all, I'm still learning the language and happy to get the > details clarified. > > The second form of condp and the #_ were omitted simply because I > didn't know about them, thanks for the heads-up. > > For quoted lists, I take your point. > For the sequence operations examples it was somewhat deliberate, in > that a sequence is a very different datatype from a vector but pretty > much the same as a list. > I had a bug in some code that conj'ed elements onto a vector, but for > some reason it would switch direction in the middle and start adding > elements at the opposite end. It took me a while to figure out that it > was because concat'ing two vectors doesn't return a vector. > So I wanted to emphasize that using a sequence op on anything other > than a list is also a conversion from one datatype to another. > But I'll take another look, there may be better ways. > > Thanks for your comments, much appreciated. I'll include them with the > next update. > > Sincerely, > jf -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
clojure compiler
Ok, this question is not about clojure itself, just a doubt I have. Clojure uses the ASM library to compile code to jvm bytecode. Let's suppose I created the foo.clj and bar.clj source files. The ns foo in foo.clj depends on the functions of bar in bar.clj. How the compiler manages file dependencies? Islon -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
problem running tests in leiningen
I have a lein project and I'm trying to run my tests with lein test. The first problem I had was a class not found error in one of my records so I put "aot: [namespace.name]" in project.clj. It's required that I put all namespaces that contain defrecords/ deftypes in the aot list? After that I tried to run the tests again and got a different error: Exception in thread "main" java.lang.ClassNotFoundException: clojure.pprint Inside lein swank this code runs and compiles with no problems, do lein execute tests with a different clojure(and/or contrib) version? This is my project.clj (defproject mediaretriever "1.0.0-SNAPSHOT" :description "..." :dependencies [[org.clojure/clojure "1.2.1"] [org.clojure/clojure-contrib "1.2.0"] [enlive "1.0.0"] [clj-http "0.1.3"] [clj-time "0.3.0"]] :dev-dependencies [[swank-clojure "1.3.0"]] :aot [mediaretriever.media]) Any help is appreciated. Regards Islon -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Search for a node querying on attrs
This is what I did: (let [nodes (html/html-resource (StringReader. body)) meta-extractor (fn [m attr] (first (filter #(= (-> % :attrs :name) attr) m))) metas (html/select nodes [:meta]) title (-> (meta-extractor metas "title") :attrs :content) desc (-> (meta-extractor metas "description") :attrs :content) date-raw (-> (meta-extractor metas "date") :attrs :content) keywords-raw (-> (meta-extractor metas "keywords") :attrs :content) keywords (string/split keywords-raw #", ")] Hope it helps. On May 5, 5:18 am, Alfredo wrote: > Ty very much :) > Alfredo > > On May 5, 10:05 am, Thorsten Wilms wrote: > > > > > > > > > On 05/04/2011 06:23 PM, Alfredo wrote: > > > > > > > > I want to extract only the content part. > > > I recently had related issues, so: > > > (def metas > > (en/html-snippet > > " > charset=UTF-8\" /> > > ")) > > > (en/select metas [[:meta (en/attr= :name "keywords")]]) > > > (-> (en/select metas [[:meta (en/attr= :name "keywords")]]) > > first :attrs :content) > > > -- > > Thorsten Wilms > > > thorwil's design for free software:http://thorwil.wordpress.com/ -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: problem running tests in leiningen
Thanks Stuart, the tests are working now. On May 6, 12:16 pm, Stuart Halloway wrote: > > I have a lein project and I'm trying to run my tests with lein test. > > The first problem I had was a class not found error in one of my > > records > > so I put "aot: [namespace.name]" in project.clj. > > It's required that I put all namespaces that contain defrecords/ > > deftypes in the aot list? > > This should not be a requirement. However, you might need to require the > namespace containing the class before using the class. > > > After that I tried to run the tests again and got a different error: > > Exception in thread "main" java.lang.ClassNotFoundException: > > clojure.pprint > > Inside lein swank this code runs and compiles with no problems, do > > lein > > execute tests with a different clojure(and/or contrib) version? > > The standard Clojure repl uses some utility fns from non-core namespaces. > Specifically: > > ;; from main.clj > (use '[clojure.repl :only (source apropos dir pst doc find-doc)]) > (use '[clojure.java.javadoc :only (javadoc)]) > (use '[clojure.pprint :only (pp pprint)]) > > When you run code outside the REPL, you will need to use these specifically > if you need them. > > Hope this helps. > > Stu > > Stuart Halloway > Clojure/corehttp://clojure.com -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Learning Idiomatic Clojure
Read the joy of clojure, it's an amazing book that will teach you the way of clojure. Islon -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Clojure ideas repository / todo list
Is there anyplace people post ideas of libraries/frameworks/functions that would be nice to be implemented in clojure? Sometimes I want to help the community but I don't know what to do (an idea), what's already done (yeah, I know one can search github or ask here but you can't be 100% sure it's not already implemented). Maybe a wiki or something like that would do the job. Thanks in advance, Islon -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Clojure ideas repository / todo list
Good ideas, I'm thinking about implementing it as my first clojure web project. Thanks! -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
date-clj clojure date/time library
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)
-> #
(-> (today) (set-date :month :december :year 1900))
-> #
(from-now 1 :year 5 :days)
-> #
(back 1 :month 200 :minutes)
-> #
(following :friday)
-> #
(-> (today) (is? :friday 13))
-> false
(-> (back 3 :days) (was? :sunday))
-> true
(-> (april) sundays first)
-> #
(-> (following :month) fridays last)
-> #
(monday)
-> #
(binding [*locale* (Locale/GERMAN)] (names :week-days))
-> ("Sontag" "Montag" "Dienstag" "Mittwoch" "Donnerstag" "Freitag"
"Samstag")
The project page is: http://github.com/stackoverflow/date-clj
Critics and ideas are welcome =)
Regards,
Islon
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Re: date-clj clojure date/time library
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 wrote:
> 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 immutable -if not persistent- datastructures)
>
> My 0.02€,
>
> --
> Laurent
>
> 2011/6/29 Islon Scherer :
>
>
>
>
>
>
>
> > 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)
> > -> #
>
> > (-> (today) (set-date :month :december :year 1900))
> > -> #
>
> > (from-now 1 :year 5 :days)
> > -> #
>
> > (back 1 :month 200 :minutes)
> > -> #
>
> > (following :friday)
> > -> #
>
> > (-> (today) (is? :friday 13))
> > -> false
>
> > (-> (back 3 :days) (was? :sunday))
> > -> true
>
> > (-> (april) sundays first)
> > -> #
>
> > (-> (following :month) fridays last)
> > -> #
>
> > (monday)
> > -> #
>
> > (binding [*locale* (Locale/GERMAN)] (names :week-days))
> > -> ("Sontag" "Montag" "Dienstag" "Mittwoch" "Donnerstag" "Freitag"
> > "Samstag")
>
> > The project page is:http://github.com/stackoverflow/date-clj
>
> > Critics and ideas are welcome =)
> > Regards,
> > Islon
>
> > --
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> > your first post.
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Re: Clojure for large programs
I think the issue with large programs is not the language but software engineering. A large program should be well designed and architected, and this is a problem (I think) many people in clojure and functional programming in general have. "Clojure is a very high level and concise language so I'll grow my program as I type". I'm not proposing UML or any specific tool or technique, but analysis and design are a important part of a large software. It's easier to understand your problem if you look at your high level documentation/diagrams than look at code. Of course some problems and refactor will happen no matter how well you designed, but you'll understand better what you did and what you should do. Islon On Jul 4, 9:40 am, James Keats wrote: > On Jul 4, 1:26 pm, James Keats wrote: > > > On Jul 4, 5:45 am, Christian Schuhegger > > A good > > book to get you started would SEMANTIC WEB for the WORKING ONTOLOGIST, > > of which a second edition has recently come out. :-) > > Sorry about the unintentional "to get you started" figure of speech; I > note you said you already had rdf/owl in your kit. It's not out of > underestimating your knowledge (though it might be out of my sense of > being mildly overwhelmed by the still remaining reading list I already > have of semantic web books, Springer just keeps dropping them like > rain. :-) -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Anyone on Google+ yet?
http://gplus.to/islonscherer On Jul 14, 8:55 pm, Sean Corfield wrote: > On Thu, Jul 14, 2011 at 4:00 PM, ianp wrote: > > Looks like G+ is pretty popular with the Clojure crowd :-) > > I've been using it for a while and I don't see the point. With > Facebook for *friends* and Twitter for tech talk (and LinkedIn for > professional networking), what purpose does G+ have? > > I just found it annoying. I recently turned off all email > notifications and deleted everyone from my circles and disabled most > of the features and now, apart from the occasional annoying red > notification icon in Gmail, I can completely ignore it. > > Is it just a case of "ooh, shiny! Google released a new toy!" or is > there actually some tangible useful benefit to a developer being on > G+? > -- > Sean A Corfield -- (904) 302-SEAN > An Architect's View --http://corfield.org/ > World Singles, LLC. --http://worldsingles.com/ > Railo Technologies, Inc. --http://www.getrailo.com/ > > "Perfection is the enemy of the good." > -- Gustave Flaubert, French realist novelist (1821-1880) -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Fixing Java Apache Class error
It seems like you didn't put the apache HTTP client jars in your path. Are you using leiningen? If so you only need to run "lein deps" and it will download the dependencies. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Fixing Java Apache Class error
Mark is right, you should use lein (or cake) repl instead of trying to run clojure on command line. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Being able to use blank?
I think it's just a sintax problem. (ns test-csv ... (:require [clojure.string :as str])) -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How to Return Vector of Vectors
Simple: conj doesn't mutate the vector, it returns a new vector. Clojure is a (mostly) immutable language, you're trying to solve the problem in a imperative way, you should solve it in a functional way. On Jul 21, 7:48 pm, octopusgrabbus wrote: > (def accumail-url-keys ["CA", "STREET", "STREET2", "CITY", "STATE", > "ZIP", "YR", "BILL_NO", BILL_TYPE"]) > > (defn ret-params > "Generates all q-parameters and returns them in a vector of > vectors." > [all-csv-rows] > (let [param-vec [[]] ] > (doseq [one-full-csv-row all-csv-rows] > (let [accumail-csv-row one-full-csv-row > q-param (zipmap accumail-url-keys accumail-csv-row) > accu-q-param (first (rest (split-at 3 q-param))) > billing-param (first (split-at 3 q-param))] > (conj param-vec accu-q-param billing-param))) > param-vec)) > > I combine some internal data with each vector returned from clojure- > csv's parse-csv. I want to return all that in a new vector of vectors, > but param-vec is empty. What am I doing wrong? > > tnx > cmn -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
JSON library for clojure 1.3
Is there a clojure json library that works in clojure 1.3? I tried danlarkin/clojure-json but it gives me error: java.lang.IllegalArgumentException: Unable to resolve classname: IPersistentMap, compiling:(org/danlarkin/json/encoder.clj:144) -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: JSON library for clojure 1.3
Thanks Sean, org.clojure/data.json worked like a charm. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: JSON library for clojure 1.3
I'll take a look, but I only need basic json encoding/decoding right now. Islon -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Need Help Parsing Clojure Strings
Do you want something like: (vec (.split some-string "\\|")) (vec (.split "AT|1 Kenilworth Rd||Soapville|ZA|99901-7505|Option value=A ==> Normal street matchOption value=T ==> ZIP+4 corrected|013|C065|" "\\|")) => ["AT" "1 Kenilworth Rd" "" "Soapville" "ZA" "99901-7505" "Option value=A ==> Normal street matchOption value=T ==> ZIP+4 corrected" "013" "C065"] -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Code structure/design problems
Hi Oskar, I've been a game programmer for more than 5 years going from simple card games to 3D MMORPGs. Even though you can make a simple game in a functional way it would be a big challenge to do the same with a moderately complex game. Games are all about state, your character if full of state, the enemies have state, the world, the AI, the physics, etc. If you're creating a complex game the language you chose is the least of your concerns, the graphics engine, physics engine, AI engine is what really matters. I'm not saying you can't create a game in clojure(I already did) and if your main objective is to learn clojure go ahead, but don't be afraid to model stateful entities. However, if you're thinking about making a complex/commercial game I strongly advise you use a game engine, there are good free game engines out there and it will make your game 2 or 3 orders of magnitude faster to finish. Islon -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: learning clojure library
You can use (ns-publics 'your.namespace) to see every public intern mapping in this namespace. Islon -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Lambda: A lniux distro for clojurists
Why not create a shell script? On May 26, 9:32 am, Denis Labaye wrote: > Hi, > > This is a very interesting idea. It would have been of great use when I > did a Clojure workshop with complete beginners, with all kinds of OSes > (Windows, OSX, ...). > > I took the "Completely packaged VirtualBox image" approach, but it is > still a big mess: Not everyone have VirtualBox installed (or the right > version). And not every flavors of the main editors where correctly > configured for Clojure (Emacs, vi). > > Being able to just "boot on a live CD", and have a working Clojure > environment would have been great. Also great for distribution: Just > burn it on a lot of cheap Cd's, and much more "down loadable": A Virtual > Box image takes about 2gig, a live CD is 700meg. > > Cheers, > > Denis > > On Thu, May 24, 2012 at 10:11 PM, banseljaj wrote: > > > > > > > > > Hello Guys, > > > I am quite new to clojure, and I am a fan. It's a great thing. One thing > > that seems missing, however, is a single unified way of setting up the > > clojure environment. Which seemed pretty daunting to me at first. > > > So I have decided to create a Linux Distro specifically for Clojure > > development. > > > I have been bouncing this idea in #clojure and it got a good response. So > > now I have started the complete development effort. > > > My plan so far is as follows. > > > Mission Statement for the Distro > > > The distro should be able to: > > > - Connect to internet. > > - Be able to convert itself into An VM/Iso/LiveCD etc > > - Have all IDEs for Clojure installed and preconfigured. > > - Eclipse > > - Vim > > - Emacs > > - Netbeans > > - Have a ready to play connection to clojure forums and channels > > - Have at-least one book on clojure programming on board > > - Have following clojure specific features > > - It should have leiningen installed and configured > > - It should have a local repo of all current clojure plugins > > - It should have a local "cloud" on which you can deploy web apps > > easily > > - it should have REPLlabs on baord and configured > > - Have Clojure specific branding > > > The packages that are needed absolutely: > > > - OpenJDK 1.7.0 > > - Leiningen > > - Clojure > > - Eclipse > > - Vim > > - Emacs 24 > > - Netbeans > > - Emacs Starter kit > > - CCW plugin for eclipse > > - Firefox/Chrome > > - A local webserver > > - Postgresql > > - LXDE/XFCE > > - Gwibber/Other Social network Client > > - xchat > > - irssi > > - git > > - Regular packages for system functioning. > > > I am still open to ideas. I intend to roll it as a complete distro, so I > > will love any and all input. > > > For now, the specific things I need input for are: > > > - Who/How to create the art for branding. > > - Any packages that are missing from the above listing. > > - Any suggestions for the overall functioning. > > > I will soon have an actual website set up. > > > It is my intention to create a fully functional, independent Development > > environment for Functional programmers by release 2. Right now, I am > > working on release 0.0.1. > > > Looking forward to all input. > > > regards. > > > banseljaj > > > -- > > You received this message because you are subscribed to the Google > > Groups "Clojure" group. > > To post to this group, send email to clojure@googlegroups.com > > Note that posts from new members are moderated - please be patient with > > your first post. > > To unsubscribe from this group, send email to > > clojure+unsubscr...@googlegroups.com > > For more options, visit this group at > >http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Top secret clojure project names
I have a big clojure project at work but it's not a secret. It superseded a old java project, the clojure one is 50 times smaller, 10 times faster and bug free. They had no choice but to accept the new one =) On Sep 1, 6:54 pm, Sean Corfield wrote: > On Thu, Sep 1, 2011 at 2:31 PM, JAX wrote: > > Hi guys: I assume some of you have "secret" Clojure projects at work, that > > your bosses don't know about. > > LOL! That would be hard for me - every commit and every ticket update > / comment is emailed to the whole project team which includes > management :) > > It does pose an interesting question tho': how many folks are using > "skunkwork" projects to introduce Clojure vs opening getting buy in up > front? > -- > Sean A Corfield -- (904) 302-SEAN > An Architect's View --http://corfield.org/ > World Singles, LLC. --http://worldsingles.com/ > Railo Technologies, Inc. --http://www.getrailo.com/ > > "Perfection is the enemy of the good." > -- Gustave Flaubert, French realist novelist (1821-1880) -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: advantage of dynamic typing
Scala is a OO language with FP support, clojure is a functional language with OO support, they are very different. It's normal for someone with a OO background to think that every method receives a object of some kind and it's good to know it's type in advance, and if you want polymorphism you create a subclass or implement an interface but in clojure functions are polymorphic not classes. Let's take the function first as an example, if you give a String to first you'll get the first char, if you give a vector or list you'll get the first element, if you give a java array you'll get the element at index 0. In scala each collection class has a overriden first method so you can have a static and pre-defined return type, in clojure the first function is itself polymorphic so it doesn't make sense to say that the return type of first is Object because it depends on the parameter. You can code clojure's first function in scala but the parameter and return type would be Object, and you would have to typecast it anyway. (Maybe with scala's extremely fancy type system you can create a generic first function a la clojure but the type signature would make my eyes hurt :) With doc, source (the functions) and the repl, a static typing system would'n be that useful -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: lein repl newbie question
Have you tried control+d? -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Re: lein repl newbie question
control+d exits clojure repl -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: suggestion for clojure development
I agree with Nicolas, clojure should, at this point, focus on improving the language instead of maintain compatibility, and as most features of other languages can be implemented as macros I think clojure is ahead of the competition. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Learning clojure - comments on my function?
You probably want something like (defn split-zero [ls] (filter #(not= (first %) 0) (partition-by zero? ls))) -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Sum on a list of maps
The best i could think was:
(defn calc-types [coll]
(let [types (map (fn [m] {:type (get m "Type") :value (Double/parseDouble
(get m "Value"))}) coll) ; convert keys to keywords and values to doubles
it1 (sort-by :type types) ; sort by type
a (atom (:type (first it1)))
it2 (partition-by (fn [m] (if (not= (:type m) @a) (do (reset! a
(:type m)) true) false)) it1)] ; partition by type
(map (fn [l] {:type (:type (first l)), :value (reduce + (map :value
l))}) it2))) ; map reduce
Hope it helps.
P.S: Try to use keywords and numbers instead of strings, the function will
be simpler
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record serialization
Hi people, I want to serialize records to further deserializing, is there a way to do that? (pr-str myrecord) doesn't seen to work. I was thinking about something like (to-map record) and (from-map RecordClass record) to serialize and deserialize. Any sugestions? Islon -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: record serialization
Yes, java serialization is what I want but I don't know how to do a record implement the Serializable interface. On Nov 23, 2:46 pm, Shantanu Kumar wrote: > Not sure about your exact requirement, but can Java serialization > help? You may need to extend the Serializable interface to the > records.http://java.sun.com/developer/technicalArticles/Programming/serializa... > > Regards, > Shantanu > > On Nov 23, 5:50 pm, Islon Scherer wrote: > > > > > > > > > Hi people, I want to serialize records to further deserializing, is > > there a way to do that? > > (pr-str myrecord) doesn't seen to work. > > I was thinking about something like (to-map record) and (from-map > > RecordClass record) to serialize and deserialize. > > Any sugestions? > > > Islon -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: record serialization
Thanks for the answers! Some guy told me on irc that you can implement interfaces right in the record definition like (defrecord R [a b] SomeInterface (methods...)) Regards. Islon On Nov 24, 4:25 am, Shantanu Kumar wrote: > Shantanu Kumar wrote: > > Islon Scherer wrote: > > > Yes, java serialization is what I want but I don't know how to do a > > > record implement the Serializable interface. > > > The following two steps may help: > > > (defrecord Foo [a b]) > > (extend java.io.Serializable Foo) > > Oops! that was a bit too fast. Records already implement Serializable. > > Regards, > Shantanu -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
