defs in Clojurescript REPL
In Clojure, when you def a variable, the REPL prints the name of the variable rather than the value. In Clojurescript, when you def a variable, the REPL prints the value assigned to the variable. This is problematic when working with lazy values. Is there any particular reason the Clojurescript REPL is designed to behave in this way? Thanks, Mark -- 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 configure a Clojure library at runtime?
Instead of using alter-var-root you could use the binding form. On this
subject of factory methods you could find useful the following article,
expecially the with-implementation macro:
http://pragprog.com/magazines/2011-07/growing-a-dsl-with-clojure
IMHO that solution should not prevent the callers from instantiate
different implementations of the same generic API, even from the same
thread.
Cheers,
Roberto
On Sat, May 12, 2012 at 2:49 PM, James Thornton james.thorn...@gmail.comwrote:
On Saturday, May 12, 2012 12:44:45 AM UTC-5, Baishampayan Ghose wrote:
There are many ways of doing this. One approach that I have seen a lot
is something like this -
;; core.clj
(def ^:dynamic *settings* {:default :stuff}) ;; the default settings can
be nil
I was experimenting with the dynamic varr approach...
;; bulbs/neo4jserver/client.clj
(def ^:dynamic *config* default-config)
(defn set-config!
[config]
(alter-var-root #'*config* (fn [_] (merge default-config config
(defn neo4j-client
[ config]
(set-config! (first config)))
(neo4j-client {:root_uri http://localhost:7474/data/db/})
(println *config*)
...but Andrew Cooke pointed out that using a global var would preclude you
from being able to use multiple, independent graph instances in your
program, whereas you can in the Python version (
http://stackoverflow.com/questions/10540999/how-to-configure-a-clojure-library-at-runtime
).
--
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: clojurescript error
I've compiled your code without problems in the CLJS REPL, and embedded in a CLJS app I'm working on. Do you get the same bug when you evaluate your code snippet using the script/repljs? Raju -- 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: tracing cljsbuild error
From the stacktrace and some source reading, it seems clj-stacktrace passes null as class-name in clj-stacktrace.core/clojure-ns, which passes it to a regex function. That should not even be possible, because it passes the same value to clj-stacktrace.core/clojure-code?, which would already throw, a few lines before. Also, the null value originates from StackTraceElement.getClassName() which I'm not even sure is allowed to be null. Maybe it was some funky state you got your JVM into. Can you reproduce the error? -- 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: tracing cljsbuild error
Also, are you running the latest version of clj-stacktrace? -- 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 beginner in search of peer-induced enlightenment
When a new technology (a programming language) comes out, initially there are very few people who are really proficient in it. One can learn by one's own, but tremendous learning acceleration can be gained if one pairs with more experienced devs than oneself. So I'd like to ask: is there any place in the world where I can pair with more experienced people on Clojure as a beginner? Put very shortly, I have: decent Ruby skills; some Rails experience; very good OO, TDD, and business modeling skills; a mastery of web standards, and experience with Responsive Web Design. I'm into web as platform, HTML5, apps, and that kind of stuff. I'm currently based in Denmark but am flexible with moving. Cheers, James http://jamesabbottdd.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: defs in Clojurescript REPL
Do you have a more specific example of why this is a problem?
On Monday, May 14, 2012, Mark Engelberg wrote:
In Clojure, when you def a variable, the REPL prints the name of the
variable rather than the value.
In Clojurescript, when you def a variable, the REPL prints the value
assigned to the variable.
This is problematic when working with lazy values. Is there any
particular reason the Clojurescript REPL is designed to behave in this way?
Thanks,
Mark
--
You received this message because you are subscribed to the Google
Groups Clojure group.
To post to this group, send email to
clojure@googlegroups.comjavascript:_e({}, 'cvml',
'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 javascript:_e({}, 'cvml',
'clojure%2bunsubscr...@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: tracing cljsbuild error
Herwig thanks for your comments. I was able to solve the problem by doing the following. I created a new source directory and changed the src path for lein-cljsbuild to the new src dir. Then I started saving one file after another to the dir. All this while I had lein cljsbuild running as auto. The instance I saved the file having faulty code to the new dir, the error stacktrace showed up in the terminal running cljsbuild. It did solve my problem, however is there a better way to do it then the trial and error method ? Thanks, Murtaza On Monday, May 14, 2012 4:07:48 PM UTC+5:30, Herwig Hochleitner wrote: Also, are you running the latest version of clj-stacktrace? -- 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
Bootstrapping Clojure-in-Clojure
Over the weekend there was some talk in IRC about why clojure-py didn't use Clojurescript as the basis for its compiler. The reasons I had, basically boiled down to this: Clojurescript is written in Clojure-JVM and as such requires that the JVM be installed, and also requires that all macros be Clojure-JVM and not ClojureScript. For Clojurescript this is fine. But for Clojure-Py this results in me writing a fair amount of translated code. Recently I've been thinking about how to change this. Much of the more recent code in Clojure is very cross platform. Stuff like reducers can simply be copied over, fixed up a bit, and it runs. If we could ever get to the point where we write Clojure in Clojure, by default, then we could support the CLR, PVM, gambit, js, lua, etc. all with a single file edit. Over the weekend I've been thinking over how to make this all possible, and I think we're very close. The GSOC projects are working at making a plugable backend (code emmiters) for ClojureScript, so that part is being taken care of. All we really need now, is a cross-platform ClojureScript compiler in ClojureScript. From there, porting to a new platform would be simple: 1) generate a new backed as per the GSOC project 2) compile the ClojureScript compiler using the new backend 3) compile your code using native macros, etc. Platforms that do not have the ability to eval (gambit, JS, etc.) they could simply stick with writing Java macros. For the rest of the platforms (CLR, JVM, PVM, lua) they could then have native macros and be able to distribute only non-Java code. One of the original goals of Clojure-py was to be able to translate the entire compiler and runtime to RPython. However, to make this happen, certain things must be changed in the Python code. For instance, all primitives must be boxed. This means turning code like this: x = 1 + 2 into this: x = W_Add(Int(1), Int(2)) Under the current Clojure-py codebase this would be a bit hard to maintain. However, with Clojure-in-Clojure this is just a different backend. I see this all as being a major boon to anyone looking to port Clojure to a different platform. Hopefully at this point we could start looking at what it would take to port Clojure to LLVM and CUDA. Thoughts from the ClojureScript, clojure-gambit, GSOC people? Timothy Baldridge (halagri) -- 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: clojurescript error
Raju thanks for your comments. I tried building using cljsbuild and the code is now compiling without any errors. I am curious to know, when you say script/repljs, are you referring to the browser based repl that cljsbuild provides access to or a cmd based repl? How do you access the latter? Thanks, Murtaza On Monday, May 14, 2012 3:53:11 PM UTC+5:30, Raju Bitter wrote: I've compiled your code without problems in the CLJS REPL, and embedded in a CLJS app I'm working on. Do you get the same bug when you evaluate your code snippet using the script/repljs? Raju -- 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
deps.js in cljsbuild?
Hi, I am using lein-cljsbuild to compile the cljs code. I see reference to a deps.js file that is added after the tag in which I have included the generated js file. The browser naturally fails to find the file as it does not exist. What is the deps.js file and how do I resolve its 404 error? Thanks, Murtaza -- 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 beginner in search of peer-induced enlightenment
James, For learning, I'd recommend 4clojure.com and compare your solutions with solutions submitted by other people. Also, if you have the cash, you could pay clojure/core to pair with you. Unfortunately, I've never heard of anyone doing that kind of thing as a mutually beneficial situation - (you learn from them, you help them with their work) Cheers, Jay On Mon, May 14, 2012 at 7:45 AM, James abbott...@gmail.com wrote: When a new technology (a programming language) comes out, initially there are very few people who are really proficient in it. One can learn by one's own, but tremendous learning acceleration can be gained if one pairs with more experienced devs than oneself. So I'd like to ask: is there any place in the world where I can pair with more experienced people on Clojure as a beginner? Put very shortly, I have: decent Ruby skills; some Rails experience; very good OO, TDD, and business modeling skills; a mastery of web standards, and experience with Responsive Web Design. I'm into web as platform, HTML5, apps, and that kind of stuff. I'm currently based in Denmark but am flexible with moving. Cheers, James http://jamesabbottdd.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 -- 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 beginner in search of peer-induced enlightenment
Hi Jay,- I agree, paying to sweep someone's dojo does sound a bit strong. / James On May 14, 3:24 pm, Jay Fields j...@jayfields.com wrote: James, For learning, I'd recommend 4clojure.com and compare your solutions with solutions submitted by other people. Also, if you have the cash, you could pay clojure/core to pair with you. Unfortunately, I've never heard of anyone doing that kind of thing as a mutually beneficial situation - (you learn from them, you help them with their work) Cheers, Jay On Mon, May 14, 2012 at 7:45 AM, James abbott...@gmail.com wrote: When a new technology (a programming language) comes out, initially there are very few people who are really proficient in it. One can learn by one's own, but tremendous learning acceleration can be gained if one pairs with more experienced devs than oneself. So I'd like to ask: is there any place in the world where I can pair with more experienced people on Clojure as a beginner? Put very shortly, I have: decent Ruby skills; some Rails experience; very good OO, TDD, and business modeling skills; a mastery of web standards, and experience with Responsive Web Design. I'm into web as platform, HTML5, apps, and that kind of stuff. I'm currently based in Denmark but am flexible with moving. Cheers, James http://jamesabbottdd.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 -- 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 beginner in search of peer-induced enlightenment
PS. My last post wasn't clearly formulated, so let me re-phrase that: I think that paying clojure/core to pair up is a perfectly legit solution if one wants to jump ahead of the curve. My point was that I wish the sweeping the dojo model was more widespread (one does whatever other work there is while learning a skill one currently lacks). / James On May 14, 3:32 pm, James abbott...@gmail.com wrote: Hi Jay,- I agree, paying to sweep someone's dojo does sound a bit strong. / James On May 14, 3:24 pm, Jay Fields j...@jayfields.com wrote: James, For learning, I'd recommend 4clojure.com and compare your solutions with solutions submitted by other people. Also, if you have the cash, you could pay clojure/core to pair with you. Unfortunately, I've never heard of anyone doing that kind of thing as a mutually beneficial situation - (you learn from them, you help them with their work) Cheers, Jay On Mon, May 14, 2012 at 7:45 AM, James abbott...@gmail.com wrote: When a new technology (a programming language) comes out, initially there are very few people who are really proficient in it. One can learn by one's own, but tremendous learning acceleration can be gained if one pairs with more experienced devs than oneself. So I'd like to ask: is there any place in the world where I can pair with more experienced people on Clojure as a beginner? Put very shortly, I have: decent Ruby skills; some Rails experience; very good OO, TDD, and business modeling skills; a mastery of web standards, and experience with Responsive Web Design. I'm into web as platform, HTML5, apps, and that kind of stuff. I'm currently based in Denmark but am flexible with moving. Cheers, James http://jamesabbottdd.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 -- 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: deps.js in cljsbuild?
I think the current fix is to add this JS declaration before you import your cljs generated js file. IIRC, this is only needed when building without advanced optimizations. script type=text/javascript var CLOSURE_NO_DEPS = true; /script script type=text/javascript src=js/myapp.js/script AJ On Mon, May 14, 2012 at 9:21 AM, Murtaza Husain murtaza.hus...@sevenolives.com wrote: Hi, I am using lein-cljsbuild to compile the cljs code. I see reference to a deps.js file that is added after the tag in which I have included the generated js file. The browser naturally fails to find the file as it does not exist. What is the deps.js file and how do I resolve its 404 error? Thanks, Murtaza -- 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: Clojure beginner in search of peer-induced enlightenment
James, Another way - I would recommend contributing to one of the Clojure contrib libraries or an open source Clojure project. It's a great way to familiarize yourself with non-trivial Clojure code, get feedback and offer something up to the community. You'll definitely get feedback from me if you contribute to any of these: - core.match - core.logic - test.benchmark - ClojureScript - mori, http://swannodette.github.com/mori/ David On Mon, May 14, 2012 at 7:45 AM, James abbott...@gmail.com wrote: When a new technology (a programming language) comes out, initially there are very few people who are really proficient in it. One can learn by one's own, but tremendous learning acceleration can be gained if one pairs with more experienced devs than oneself. So I'd like to ask: is there any place in the world where I can pair with more experienced people on Clojure as a beginner? Put very shortly, I have: decent Ruby skills; some Rails experience; very good OO, TDD, and business modeling skills; a mastery of web standards, and experience with Responsive Web Design. I'm into web as platform, HTML5, apps, and that kind of stuff. I'm currently based in Denmark but am flexible with moving. Cheers, James http://jamesabbottdd.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 -- 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: Bootstrapping Clojure-in-Clojure
Sounds reasonable. Is there some specific direction you are suggesting? David On Mon, May 14, 2012 at 8:35 AM, Timothy Baldridge tbaldri...@gmail.comwrote: Over the weekend there was some talk in IRC about why clojure-py didn't use Clojurescript as the basis for its compiler. The reasons I had, basically boiled down to this: Clojurescript is written in Clojure-JVM and as such requires that the JVM be installed, and also requires that all macros be Clojure-JVM and not ClojureScript. For Clojurescript this is fine. But for Clojure-Py this results in me writing a fair amount of translated code. Recently I've been thinking about how to change this. Much of the more recent code in Clojure is very cross platform. Stuff like reducers can simply be copied over, fixed up a bit, and it runs. If we could ever get to the point where we write Clojure in Clojure, by default, then we could support the CLR, PVM, gambit, js, lua, etc. all with a single file edit. Over the weekend I've been thinking over how to make this all possible, and I think we're very close. The GSOC projects are working at making a plugable backend (code emmiters) for ClojureScript, so that part is being taken care of. All we really need now, is a cross-platform ClojureScript compiler in ClojureScript. From there, porting to a new platform would be simple: 1) generate a new backed as per the GSOC project 2) compile the ClojureScript compiler using the new backend 3) compile your code using native macros, etc. Platforms that do not have the ability to eval (gambit, JS, etc.) they could simply stick with writing Java macros. For the rest of the platforms (CLR, JVM, PVM, lua) they could then have native macros and be able to distribute only non-Java code. One of the original goals of Clojure-py was to be able to translate the entire compiler and runtime to RPython. However, to make this happen, certain things must be changed in the Python code. For instance, all primitives must be boxed. This means turning code like this: x = 1 + 2 into this: x = W_Add(Int(1), Int(2)) Under the current Clojure-py codebase this would be a bit hard to maintain. However, with Clojure-in-Clojure this is just a different backend. I see this all as being a major boon to anyone looking to port Clojure to a different platform. Hopefully at this point we could start looking at what it would take to port Clojure to LLVM and CUDA. Thoughts from the ClojureScript, clojure-gambit, GSOC people? Timothy Baldridge (halagri) -- 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: Faster application startup for rapid development
Also discovered I can prefix `java -cp ...` with `rlwrap` to get back a nice REPL experience. -S -- 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 beginner in search of peer-induced enlightenment
Hi David,- thanks for the feedback. To jump in and start augmenting non-trivial Clojure code sounds like a serious task. I think the prerequisite for that would be to be able to read and write trivial Clojure code, which is where I'm at right now! But I'll definitely study the libraries you proposed. They give a good sense of direction. Cheers, James On May 14, 6:02 pm, David Nolen dnolen.li...@gmail.com wrote: James, Another way - I would recommend contributing to one of the Clojure contrib libraries or an open source Clojure project. It's a great way to familiarize yourself with non-trivial Clojure code, get feedback and offer something up to the community. You'll definitely get feedback from me if you contribute to any of these: - core.match - core.logic - test.benchmark - ClojureScript - mori,http://swannodette.github.com/mori/ David On Mon, May 14, 2012 at 7:45 AM, James abbott...@gmail.com wrote: When a new technology (a programming language) comes out, initially there are very few people who are really proficient in it. One can learn by one's own, but tremendous learning acceleration can be gained if one pairs with more experienced devs than oneself. So I'd like to ask: is there any place in the world where I can pair with more experienced people on Clojure as a beginner? Put very shortly, I have: decent Ruby skills; some Rails experience; very good OO, TDD, and business modeling skills; a mastery of web standards, and experience with Responsive Web Design. I'm into web as platform, HTML5, apps, and that kind of stuff. I'm currently based in Denmark but am flexible with moving. Cheers, James http://jamesabbottdd.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 -- 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 beginner in search of peer-induced enlightenment
On Mon, May 14, 2012 at 10:41 AM, James abbott...@gmail.com wrote: thanks for the feedback. To jump in and start augmenting non-trivial Clojure code sounds like a serious task. I think the prerequisite for that would be to be able to read and write trivial Clojure code, which is where I'm at right now! But I'll definitely study the libraries you proposed. They give a good sense of direction. Welcome to Clojure, James! You'll find folks are pretty helpful both here and in #clojure on IRC (freenode.net). Just a friendly reminder that contributing to Clojure itself or the new contrib libraries requires a signed Contributor's Agreement on file per http://clojure.org/contributing and then patches can be attached to JIRA tickets per http://clojure.org/patches -- 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
ANN: Lemur - A tool/DSL for launching hadoop jobs on elastic-mapreduce
Lemur is a tool to launch hadoop jobs locally or on EMR, based on a
configuration file referred to as a jobdef. The jobdef file describes your
EMR cluster, local environment, pre- and post-actions (aka hooks) and zero
or more steps (jobs). Lemur reads your jobdef, at the end of your jobdef
you execute (fire! ...) to make things happen. Lemur is implemented as an
internal DSL.
What Lemur is Not: Lemur is NOT a replacement for the Ruby
elastic-mapreduce cli. There is some overlap, but I did not attempt to
reproduce functionality (like --list, --terminate, etc) that works
perfectly well in that tool. Also, Lemur is not a job scheduler (a la
Oozie, Quartz or Azkaban). You might decide to use one of those tools to
trigger Lemur which knows how to run your job.
A simple jobdef:
(add-validators
(val-opts :required :numeric :num-days))
(add-hooks
(when-local-test)
(diff-test-data [RESULTS results]))
(defcluster marcs-cluster
:num-instances 1
:master-instance-type m1.large
:my-root /Users/mlimotte/projects/lemur/tmp
:upload [./marcs-input.txt :to ${data-uri}/input.txt]
:test-uri ${my-root}/work
:keypair my-keypair
:jar-src-path ${my-root}/lemur-test-0.0.1-SNAPSHOT-standalone.jar)
(defstep marcs-step
:main-class lemur_test.marcs
:args.days #(:num-days %)
:args.data-uri true)
(fire! marcs-cluster marcs-step)
This tool was developed at The Climate Corporation (TCC). TCC has chosen
to release this project with an Apache 2.0 license.
Blog post:
http://entxtech.blogspot.com/2012/05/lemur-declarative-launching-of-hadoop.html
Github Project: https://github.com/TheClimateCorporation/lemur
Marc Limotte
--
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: Bootstrapping Clojure-in-Clojure
Much of the more recent code in Clojure is very cross platform. Stuff like reducers can simply be copied over, fixed up a bit, and it runs. I wonder how is the fork/join part carrier over for reducers. -- 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: Bootstrapping Clojure-in-Clojure
On Mon, May 14, 2012 at 2:32 PM, Armando Blancas abm221...@gmail.comwrote: Much of the more recent code in Clojure is very cross platform. Stuff like reducers can simply be copied over, fixed up a bit, and it runs. I wonder how is the fork/join part carrier over for reducers. Sounds straightforward for any language that provides task level parallelism natively or via a library. 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 at http://groups.google.com/group/clojure?hl=en
Re: how to get good at clojure?
Sam, thanks for the pointer to quilt. Looks really cool. I'm starting to imagine a project with quilt and overtone together! Regards, Bill On May 11, 2012 3:34 PM, Sam Aaron samaa...@gmail.com wrote: In addition to following up on all the great suggestions above, I'd hack about with Quil; it's a lot of fun and you'll get instant feedback. You'll also very quickly run into the fun that is juggling pure fns, lazy sequences and orchestrating side effects (to sketch stuff). http://github.com/quil/quil -- http://sam.aaron.name On Friday, 11 May 2012 at 18:26, Daniel Gagnon wrote: On Mon, May 7, 2012 at 8:48 PM, toan kidn...@gmail.com (mailto: kidn...@gmail.com) wrote: Hi folks, I've been trying to learn clojure for a while. I've read the clojure section of seven languages... and currently trying to get through joy of clojure. I've been practicing with the prompt a bit and trying to learn emacs that came with clojurebox. The clojure part of seven languages isn't very idiomatic. Try Programming Clojure 2n Edition by Stuart Halloway, I think it's the best learning book. And clojurebox is quite outdated give a try to lein and the clooj editor. I have 2 questions, 1. does anyone have advice on getting somewhat competent for a newb? (alternatively, how did you get good?) Code until it clicks, then progress gets much faster. 2. if i have no interest in java, should a learn at least some fundamentals? would that be helpful? Try reading some javadoc and see if it makes sense to you. Learning Java isn't critical to start but eventually, you'll want to use Java libraries and then it's best to have some basics. -- 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 (mailto: 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 (mailto: clojure%2bunsubscr...@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 (mailto: 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 (mailto: 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 -- 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 beginner in search of peer-induced enlightenment
This might not sound glamorous, but reading books, and reading great code, and code reviews is a great way to get up to speed. The explanations found in the Joy of Clojure, and other books have been highly edited and refined; if I ever paired up with someone, I doubt my ad-hoc verbal explanations would ever approach that degree of excellence. On Monday, 14 May 2012 10:10:14 UTC-4, James wrote: PS. My last post wasn't clearly formulated, so let me re-phrase that: I think that paying clojure/core to pair up is a perfectly legit solution if one wants to jump ahead of the curve. My point was that I wish the sweeping the dojo model was more widespread (one does whatever other work there is while learning a skill one currently lacks). / James On May 14, 3:32 pm, James abbott...@gmail.com wrote: Hi Jay,- I agree, paying to sweep someone's dojo does sound a bit strong. / James On May 14, 3:24 pm, Jay Fields j...@jayfields.com wrote: James, For learning, I'd recommend 4clojure.com and compare your solutions with solutions submitted by other people. Also, if you have the cash, you could pay clojure/core to pair with you. Unfortunately, I've never heard of anyone doing that kind of thing as a mutually beneficial situation - (you learn from them, you help them with their work) Cheers, Jay On Mon, May 14, 2012 at 7:45 AM, James abbott...@gmail.com wrote: When a new technology (a programming language) comes out, initially there are very few people who are really proficient in it. One can learn by one's own, but tremendous learning acceleration can be gained if one pairs with more experienced devs than oneself. So I'd like to ask: is there any place in the world where I can pair with more experienced people on Clojure as a beginner? Put very shortly, I have: decent Ruby skills; some Rails experience; very good OO, TDD, and business modeling skills; a mastery of web standards, and experience with Responsive Web Design. I'm into web as platform, HTML5, apps, and that kind of stuff. I'm currently based in Denmark but am flexible with moving. Cheers, James http://jamesabbottdd.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 -- 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 beginner in search of peer-induced enlightenment
On Mon, May 14, 2012 at 7:45 PM, James abbott...@gmail.com wrote: When a new technology (a programming language) comes out, initially there are very few people who are really proficient in it. One can learn by one's own, but tremendous learning acceleration can be gained if one pairs with more experienced devs than oneself. So I'd like to ask: is there any place in the world where I can pair with more experienced people on Clojure as a beginner? Put very shortly, I have: decent Ruby skills; some Rails experience; very good OO, TDD, and business modeling skills; a mastery of web standards, and experience with Responsive Web Design. I'm into web as platform, HTML5, apps, and that kind of stuff. I'm currently based in Denmark but am flexible with moving. Cheers, James http://jamesabbottdd.com/ Not sure what exactly you're expecting... but I'm developing an opensource A.I. project in Clojure, which will be capable of learning to answer questions and converse in natural language. I'm working with an informal group of partners, but we need a CEO or business guy to manage the project and commercialize it. Also we're developing a web front-end for the logic engine, probably using Javascript. Just drop me a line if you're interested to know more =) YKY -- 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 beginner in search of peer-induced enlightenment
Are there any Clojure dojos near where you live? We have a monthly one in London, which is a great way for people of different experience levels to come together. Cheers, Chris On 14 May 2012 12:45, James abbott...@gmail.com wrote: When a new technology (a programming language) comes out, initially there are very few people who are really proficient in it. One can learn by one's own, but tremendous learning acceleration can be gained if one pairs with more experienced devs than oneself. So I'd like to ask: is there any place in the world where I can pair with more experienced people on Clojure as a beginner? Put very shortly, I have: decent Ruby skills; some Rails experience; very good OO, TDD, and business modeling skills; a mastery of web standards, and experience with Responsive Web Design. I'm into web as platform, HTML5, apps, and that kind of stuff. I'm currently based in Denmark but am flexible with moving. Cheers, James http://jamesabbottdd.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 -- 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
Troubles with truthiness
I ran across this behaviour today: shackles.examples= (import '[clojure.lang Seqable]) clojure.lang.Seqable shackles.examples= (deftype Foo [] Seqable (seq [this] ())) shackles.examples.Foo shackles.examples= (empty? (Foo.)) false shackles.examples= (deftype Bar [] Seqable (seq [this] nil)) shackles.examples.Bar shackles.examples= (empty? (Bar.)) true shackles.examples= (empty? ()) true Now I understand why this happens - () is truthy but nil is falsey. This seems related to the difference between next and rest. Is there an underlying principle here? -- 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: Leiningen 2.0.0-preview4
Having another little problem, any help appreciated: alan@shotwell /cygdrive/c/Workspaces/Clojure-lein $ lein2 new startingclojure Generating a project called startingclojure based on the 'default' template. java.lang.IllegalArgumentException: No implementation of method: :make-reader of protocol: #'clojure.java.io/IOFactory found for class: nil at clojure.core$_cache_protocol_fn.invoke(core_deftype.clj:495) at clojure.java.io$fn__7795$G__7790__7802.invoke(io.clj:63) at clojure.java.io$reader.doInvoke(io.clj:96) at clojure.lang.RestFn.invoke(RestFn.java:410) at leiningen.new.templates$slurp_resource.invoke(templates.clj:29) at leiningen.new.templates$renderer$fn__709.doInvoke(templates.clj:79) at clojure.lang.RestFn.invoke(RestFn.java:423) at leiningen.new.default$default.invoke(default.clj:15) at clojure.lang.Var.invoke(Var.java:401) at clojure.lang.AFn.applyToHelper(AFn.java:161) at clojure.lang.Var.applyTo(Var.java:518) at clojure.core$apply.invoke(core.clj:602) at leiningen.new$create.doInvoke(new.clj:54) at clojure.lang.RestFn.invoke(RestFn.java:425) at leiningen.new$create.invoke(new.clj:47) at clojure.lang.AFn.applyToHelper(AFn.java:161) at clojure.lang.RestFn.applyTo(RestFn.java:132) at clojure.core$apply.invoke(core.clj:600) at leiningen.new$new.doInvoke(new.clj:101) at clojure.lang.RestFn.invoke(RestFn.java:421) at clojure.lang.Var.invoke(Var.java:405) at clojure.lang.AFn.applyToHelper(AFn.java:163) at clojure.lang.Var.applyTo(Var.java:518) at clojure.core$apply.invoke(core.clj:602) at leiningen.core.main$resolve_task$fn__699.doInvoke(main.clj:66) at clojure.lang.RestFn.applyTo(RestFn.java:139) at clojure.lang.AFunction$1.doInvoke(AFunction.java:29) at clojure.lang.RestFn.applyTo(RestFn.java:137) at clojure.core$apply.invoke(core.clj:602) at leiningen.core.main$apply_task.invoke(main.clj:88) at leiningen.core.main$_main$fn__731.invoke(main.clj:140) at leiningen.core.main$_main.doInvoke(main.clj:140) at clojure.lang.RestFn.invoke(RestFn.java:421) at clojure.lang.Var.invoke(Var.java:405) at clojure.lang.AFn.applyToHelper(AFn.java:163) at clojure.lang.Var.applyTo(Var.java:518) at clojure.core$apply.invoke(core.clj:600) at clojure.main$main_opt.invoke(main.clj:323) at clojure.main$main.doInvoke(main.clj:426) at clojure.lang.RestFn.invoke(RestFn.java:457) at clojure.lang.Var.invoke(Var.java:413) at clojure.lang.AFn.applyToHelper(AFn.java:172) at clojure.lang.Var.applyTo(Var.java:518) at clojure.main.main(main.java:37) alan@shotwell /cygdrive/c/Workspaces/Clojure-lein $ lein2 version Leiningen 2.0.0-preview3 on Java 1.6.0_31 Java HotSpot(TM) Client VM On Sat, May 12, 2012 at 4:39 PM, John Gabriele jmg3...@gmail.com wrote: On May 12, 7:07 pm, John Gabriele jmg3...@gmail.com wrote: Whoops. Typo: Another important reason for having a good default README.md template specifically for libs is that, at some point, I'm guessing that clojars.org will extract and render them as html, and it will be nice if there's some conventions already in place. s/some conventions/some more conventions/ :) Also, re Sure, that makes sense. Feel free to open an issue and/or pull request on the lein-newnew project for it. Great. Will look into that later tonight. Thanks, ---John -- 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: closure example doesn't need let?
hi, Just a couple of paragraphs further on in the book (p. 137): In our definition of times-n, we created a local x using let and closed over that instead of closing over the argument n directly. But this was only to help focus the discussion on other parts of the function. In fact, closures close over parameters of outer functions in exactly the same way as they do over let locals. Thus times-n could be defined without any let at all. regards, naipmoro On Sat, May 12, 2012 at 12:20 PM, larry larrye2...@gmail.com wrote: I saw this example of a simple closure in Joy of Clojure and on some Clojure tutorial page. (defn adder[n] (let [x n] (fn[y] (+ y x Is the let necessary? It seems redundant. I tried it like this and it seems to work fine. (defn adder[n] (fn[y] (+ y n)) -- 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
docstrings of if-let and when-let incorrect
The docstring of if-let is as follows: bindings = binding-form test If test is true, evaluates then with binding-form bound to the value of test, if not, yields else I think it should be mentioned in the docs that if-let and when-let support only *one binding*, not multiple bindings (like for example https://www.refheap.com/paste/2700). Kind regards, Michiel -- 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: Leiningen 2.0.0-preview4
Hi, In cygwin on win7 I get this: _ $ lein2 upgrade The script at /cygdrive/c/Users/alan/bin/lein2 will be upgraded to the latest preview version. Do you want to continue [Y/n]? Y Upgrading... % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 0 127 0 0 0 0 0 0 --:--:-- 0:00:01 --:--:-- 0Warning: Failed to create the file /tmp/lein-3060-upgrade: No such file or Warning: directory 100 7230 100 7230 0 0 5452 0 0:00:01 0:00:01 --:--:-- 33165 curl: (23) Failed writing body (0 != 7230) $ ls -ld /tmp drwxrwxrwt+ 1 alan root 0 May 12 15:17 /tmp/ --- Not sure what to do... -A On Sat, May 12, 2012 at 1:41 PM, Phil Hagelberg p...@hagelb.org wrote: On Sat, May 12, 2012 at 11:06 AM, John Gabriele jmg3...@gmail.com wrote: After `lein self-install`, when I first ran `lein help` I get this output: https://www.refheap.com/paste/2697. Just a few questions: * What's the Clojure 1.3.0 jar required for if lein is using 1.4.0 internally? Some of the dependencies for the plugin that provides the `new` task declare it, and there's currently no way to prevent these from being fetched. I believe this is also causing 1.3.0 to be active for the repl task. This is a known issue we hope to address in preview5. * Why is it grabbing the Clojure 1.2.1 pom? (though I noticed it does not grab the 1.2.1 jar) There's probably a version range declaration somewhere that's forcing it to examine a number of versions even though it doesn't use them. It has to build a full dependency graph before deciding which version declarations actually win. By the way, I like that you can now pass extra args to `lein new` to create a project of a specific type (such as plugin). What do you think of adding 2 more stock options: application and library? What would the difference between the two be? If it's just a matter of whether there's a :main function then it might be simpler just to have a commented-out line in project.clj. If there are other differences then maybe it would be justified. Note that you can publish your own templates to Clojars, just deploy one as name/lein-template and it will be used when someone runs `lein new name myproject`. -Phil -- 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
defstruct defrecord metadata
Hi,
I'm new to Clojure. I've been unsuccessful in finding a clear answer or
getting it to work (might just have done it incorrectly, since I'm still
learning). I understand that you can add metadata to an object,
with-meta, and to a variable or parameter, ^{:. However, I would like
to apply metadata to defrecord and defstruct, so that the data type
definitions are associated with the metadata. This will be the same as
applying an annotation to a Java class.
Does Clojure support something similar? If so, please provide a simple
example of how it will be applied to, and read from, a defrecord and
defstruct. If Clojure doesn't, then that's okay as well, as I've found a
relatively straight forward way to achieve the same result. I just want to
make sure I'm not missing something before going ahead using my custom
annotation mechanism.
Really appreciate the help. Thanks!
Jacques
--
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
How to use third-party libraries with Leiningen that are not found in Clojars or Maven
I have a few issues which are all related. I'll do my best to explain them one by one. I'd like to use the latest version of the jOGL library with Clojure 1.3 / Leiningen 1.7.1 / OpenJDK 1.6. After getting the jars from joGL's website, how can I get the library exposed to leiningen and Clojure in the most convenient way? I see no obvious way to set extra classpaths for a leiningen project, but I might have missed something obvious. Also, leiningen happily ignores the * $CLASSPATH* environment variable. And besides repacking jOGL and make it available in Maven or Clojars, what is the best approach for distributing the extra jOGL dependency? jOGL is a JRI library, and I assume that's why the existing opengl/jogl 2.0-rc3 package in Clojars appears to be broken. Roughly from what I've read elsewhere, Maven repos don't like platform-specific dependencies, so that probably leaves lein-localrepo out of the picture as well. You'll have to excuse my ignorance. I'm both new to Clojure and Java, but any pointers and reading suggestions will humbly be taken with open arms. My background is C++ and various assembly dialects. I'd love to get OpenGL 3.3 and Swing working in Clojure :-) - Mads Elvheim / Madsy -- 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: [ANN] C2: Clojure/ClojureScript data visualization
On Fri, May 11, 2012 at 9:04 PM, Kevin Lynagh ke...@keminglabs.com wrote: Announcing C2, a data visualization library inspired by D3.js C2 is not a charting library; there are no plotting functions like scatterplot or piechart . Instead, C2 is a collection of scales, map projections, and component templates (e.g., axes) that you can compose to build custom data graphics on a DOM (e.g., HTML or SVG). C2 is written in Clojure and can be used on the JVM in conjunction with the Hiccup HTML rendering library to generate markup. C2 can also be used within ClojureScript, where it includes + its own Hiccup compiler that acts directly on live DOM nodes + event wrappers for use with large datasets (via delegation) + DOM manipulation helpers (the usual suspects for manipulating styles/attributes, selecting, appending, and removing DOM nodes) To get started, just add it to your project.clj: [com.keminglabs/c2 0.1.0] There is also a standalone uberjar with built-in web server if you don't have Leiningen around; see this 2-minute screencast: http://www.youtube.com/watch?v=Urg79FmQnYs For more information, see Homepage: http://keminglabs.com/c2/ Marginalia docs: http://keminglabs.com/c2/docs/ Github: https://github.com/lynaghk/c2/ Some projects that pair well with C2: cljx, a Leiningen plugin that statically rewrites metadata-annotated Clojure code into platform specific code: https://github.com/lynaghk/cljx Cassowary, a linear constraint solver accessible from ClojureScript: https://github.com/lynaghk/cassowary-coffee Vomnibus, a collection of geographic data and color schemes: https://github.com/lynaghk/vomnibus Further reading: D3 paper: http://vis.stanford.edu/files/2011-D3-InfoVis.pdf D3 examples: https://github.com/mbostock/d3/wiki/Gallery Tick selection algorithm: http://graphics.stanford.edu/vis/publications/2010/labeling-preprint.pdf Stephen Few: http://www.perceptualedge.com/library.php Bret Victor on information software: http://worrydream.com/MagicInk/ -- i tried it and it works. thanks for this library -- 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: Bootstrapping Clojure-in-Clojure
http://www.lambdassociates.org/blog/klambda.htm suggests a possible bootstrapping mechanism, some kind of reduced set of clojure functionality ur-clojure that is designed to be easy to write and interpreter for, and a compiler backend that generates ur-clojure, after compiling the compiler+platform backend to ur-clojure you write an ur-clojure interpreter on the platform in question, feed the compiler+backend through the interpreted compiler+backend to compile it for the platform you are bootstrapping, and then you are bootstrapped. You could do something similar, but maybe simpler, by taking the maps output from the analysis phase of the compiler run over the compiler and serliazing them as json (so they are easily readable on different platforms) effectively substituting the maps output from the analysis phase for ur-clojure. On Mon, May 14, 2012 at 11:36 AM, David Nolen dnolen.li...@gmail.com wrote: On Mon, May 14, 2012 at 2:32 PM, Armando Blancas abm221...@gmail.com wrote: Much of the more recent code in Clojure is very cross platform. Stuff like reducers can simply be copied over, fixed up a bit, and it runs. I wonder how is the fork/join part carrier over for reducers. Sounds straightforward for any language that provides task level parallelism natively or via a library. 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 at http://groups.google.com/group/clojure?hl=en -- And what is good, Phaedrus, And what is not good— Need we ask anyone to tell us these things? -- 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 beginner in search of peer-induced enlightenment
On Mon, May 14, 2012 at 4:47 AM, Chris Ford christophertf...@gmail.com wrote: Are there any Clojure dojos near where you live? We have a monthly one in London, which is a great way for people of different experience levels to come together. FYI, the guy who used to run the London Clojure dojo - Toby Clemson - is now based here in San Francisco and runs one every month: http://www.meetup.com/The-Bay-Area-Clojure-User-Group/ -- 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
Re: How to use third-party libraries with Leiningen that are not found in Clojars or Maven
Check out lein-localrepo - a way to install arbitrary JARs in your local Maven repo cache. On Sat, May 12, 2012 at 9:36 AM, Mads Andreas Elvheim mads.elvh...@gmail.com wrote: I have a few issues which are all related. I'll do my best to explain them one by one. I'd like to use the latest version of the jOGL library with Clojure 1.3 / Leiningen 1.7.1 / OpenJDK 1.6. After getting the jars from joGL's website, how can I get the library exposed to leiningen and Clojure in the most convenient way? I see no obvious way to set extra classpaths for a leiningen project, but I might have missed something obvious. Also, leiningen happily ignores the $CLASSPATH environment variable. And besides repacking jOGL and make it available in Maven or Clojars, what is the best approach for distributing the extra jOGL dependency? jOGL is a JRI library, and I assume that's why the existing opengl/jogl 2.0-rc3 package in Clojars appears to be broken. Roughly from what I've read elsewhere, Maven repos don't like platform-specific dependencies, so that probably leaves lein-localrepo out of the picture as well. You'll have to excuse my ignorance. I'm both new to Clojure and Java, but any pointers and reading suggestions will humbly be taken with open arms. My background is C++ and various assembly dialects. I'd love to get OpenGL 3.3 and Swing working in Clojure :-) - Mads Elvheim / Madsy -- 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: Leiningen 2.0.0-preview4
On Sat, May 12, 2012 at 3:22 PM, Alan Shaw noden...@gmail.com wrote: In cygwin on win7 I get this: Could you open an issue on Github for this? I don't know enough about Windows to say what's going on here, but if it's on the issue tracker there's a better chance of getting it figured out if someone more Windows-savvy can help out. thanks, Phil -- 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 use third-party libraries with Leiningen that are not found in Clojars or Maven
Depending on who else you are wanting to share the dependency with, you may find Phil Hagelberg's s3-wagon-private useful: https://github.com/technomancy/s3-wagon-private On Mon, May 14, 2012 at 4:23 PM, Sean Corfield seancorfi...@gmail.com wrote: Check out lein-localrepo - a way to install arbitrary JARs in your local Maven repo cache. On Sat, May 12, 2012 at 9:36 AM, Mads Andreas Elvheim mads.elvh...@gmail.com wrote: I have a few issues which are all related. I'll do my best to explain them one by one. I'd like to use the latest version of the jOGL library with Clojure 1.3 / Leiningen 1.7.1 / OpenJDK 1.6. After getting the jars from joGL's website, how can I get the library exposed to leiningen and Clojure in the most convenient way? I see no obvious way to set extra classpaths for a leiningen project, but I might have missed something obvious. Also, leiningen happily ignores the $CLASSPATH environment variable. And besides repacking jOGL and make it available in Maven or Clojars, what is the best approach for distributing the extra jOGL dependency? jOGL is a JRI library, and I assume that's why the existing opengl/jogl 2.0-rc3 package in Clojars appears to be broken. Roughly from what I've read elsewhere, Maven repos don't like platform-specific dependencies, so that probably leaves lein-localrepo out of the picture as well. You'll have to excuse my ignorance. I'm both new to Clojure and Java, but any pointers and reading suggestions will humbly be taken with open arms. My background is C++ and various assembly dialects. I'd love to get OpenGL 3.3 and Swing working in Clojure :-) - Mads Elvheim / Madsy -- 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: How to use third-party libraries with Leiningen that are not found in Clojars or Maven
You can create a virtual repository in your project's source tree and add it to your project as an extra repository with the file: protocol. Technique described (for Maven) here: https://devcenter.heroku.com/articles/local-maven-dependencies -S -- 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: Troubles with truthiness
The empty list () is an object, and objects are truthy. `seq` on any empty collection is defined to return nil. So your definition: (deftype Foo [] Seqable (seq [this] ())) should return nil instead of the empty list. `(next x)` is equivalent to `(seq (rest x))` -S -- 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
defrecord serialization and *data-readers*
When I first started my project I tried using defrecord and defprotocol for
various data structurs and when I wanted an easy serialization function I
used pr-str and read-string, this worked great!... until I wanted to do
some refactoring and move some types to another namespace. After changing
the namespace name, I could no longer read the serialized data structures
since the serialized data included namespace and record type
#namespace.Record{:prop value }. Ideally, I would just be able to
redefine the reader literal for #namespace.Record so that I could define a
custom function or perhaps alias it to an equivalent record type in a
different namespace via *data-readers*, but this didn't seem to work for
me. It appears that data-readers can't override the reader literals for
record types and instead read-string throws a class not found exception. I
have since stopped using record types for serialization and saving
everything as maps, but this has increased the complexity of the
deserialization logic as I need to store the type information in fields and
restore these types after deserialization. I liked using record types, but
I don't like not being able to rename these types later if I change my
mind.
It seems to me that I should perhaps be able to override the reader
literals for record types?
--
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: defs in Clojurescript REPL
(def tree (function-that-produces-an-enormous-tree 2)) Want do that in Clojurescript, and you'll be treated to tons and tons of nested tree data printed to the REPL. Want to time something that's supposed to be lazy, to make sure it's really lazy, and see how long it takes to produce the eager aspects? In Clojure, that's easy: (time (def result (lazy-function 10))) In Clojurescript, the REPL will produce the whole lazy sequence. That's bad. So there are a couple examples of things that are harder to do when your REPL prints the values that are attached to variables. But again, the real question here is, why does Clojurescript deviate on this point? I know that Clojurescript doesn't exactly match Clojure, but shouldn't all deviations be done for a reason? --Mark On Mon, May 14, 2012 at 5:06 AM, David Nolen dnolen.li...@gmail.com wrote: Do you have a more specific example of why this is a problem? On Monday, May 14, 2012, Mark Engelberg wrote: In Clojure, when you def a variable, the REPL prints the name of the variable rather than the value. In Clojurescript, when you def a variable, the REPL prints the value assigned to the variable. This is problematic when working with lazy values. Is there any particular reason the Clojurescript REPL is designed to behave in this way? Thanks, Mark -- 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 -- 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: defs in Clojurescript REPL
On Mon, May 14, 2012 at 7:27 PM, Mark Engelberg mark.engelb...@gmail.comwrote: (def tree (function-that-produces-an-enormous-tree 2)) Isn't doing this at the top level bad form? So there are a couple examples of things that are harder to do when your REPL prints the values that are attached to variables. But again, the real question here is, why does Clojurescript deviate on this point? I know that Clojurescript doesn't exactly match Clojure, but shouldn't all deviations be done for a reason? --Mark There are a few good reasons to not reify things like vars and namespaces in ClojureScript - one of these is Google Closure Compiler. Also I don't see how this isn't solved by modifying some habits. (defn test-tree [] (function-that-produces-an-enormous-tree 2)) (time (test-tree)) 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 at http://groups.google.com/group/clojure?hl=en
Re: Faster application startup for rapid development
On Friday, May 11, 2012 5:33:22 PM UTC-4, Stuart Sierra wrote: What other tricks do you have for speeding up your development cycle with Clojure? I have a similar situation, where I've had to restart a repl a *lot* for a particular program (several times a day, like 10-20 times and sometimes more). Also, I've always found the startup time of Leiningen to be too long to be usable--I'm very, very impatient--so I stopped using it a while back for startup; most of the time is due to itself being written in Clojure, which is awesome, but one thing about Clojure/JVM that just isn't awesome is precisely its startup time. Using an ugly shell script worked fine for a while, but then I wanted some more niceties, basically to run a script with just a few directory arguments and have it figure it all out, hunt the jars anywhere in the path, use only the latest versions of two colliding jars for the same package, and find .clj files and corresponding roots to add to the classpath and start my VM. So I wrote one; it also provides startup options for swank, the vanilla repl, nrepl, and to just run as a main program. Basically I just clone all the projects I need in a single directory and then I run: streamlined --swank [DIR] and it pretty much works. You can still use lein deps on projects to fetch their dependencies (only once). You can also specify a number of directories, and add explicit classpaths with -c (I do this in a Makefile these days). Also, -v or -vv will output lots of juicy info about what it does so you can debug issues very easily. You can find the latest version here if that makes your life simpler (it's a single Python script): http://furius.ca/pubcode/pub/conf/bin/streamlined.html -- 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: defs in Clojurescript REPL
On Mon, May 14, 2012 at 4:41 PM, David Nolen dnolen.li...@gmail.com wrote: On Mon, May 14, 2012 at 7:27 PM, Mark Engelberg mark.engelb...@gmail.comwrote: (def tree (function-that-produces-an-enormous-tree 2)) Isn't doing this at the top level bad form? The purpose of a REPL is for interactive experimentation. I want to give names to the things I'm building so I can play with them in the REPL. Nothing bad form about that. Also I don't see how this isn't solved by modifying some habits. (defn test-tree [] (function-that-produces-an-enormous-tree 2)) (time (test-tree)) time prints out the value that is computed. The above example would suffer the same problem of printing out the tree at the REPL. You could do something like (time (do (test-tree) nil)) to suppress printing, but if you want to do further interactive manipulations to the tree, you'd end up recomputing it. So then, you get into workarounds involving delay. It starts to get ugly, I think. Clojure's ability to give names to things without printing the values is a feature I use every day in my interactive explorations. -- 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: defs in Clojurescript REPL
I think this is a pretty valid feature request. The main question is, can this be done without having vars in clojurescript. One way to do it is to surpress output somehow, under certain conditions. Either as a token at the end of a repl input, or in the semantics of def itself. I don't have an ideal specific solution here, but I've noticed this problem as well and found it pretty annoying. There should be a way to solve it that is a reasonable compromise. On Mon, May 14, 2012 at 11:13 PM, Mark Engelberg mark.engelb...@gmail.com wrote: On Mon, May 14, 2012 at 4:41 PM, David Nolen dnolen.li...@gmail.com wrote: On Mon, May 14, 2012 at 7:27 PM, Mark Engelberg mark.engelb...@gmail.com wrote: (def tree (function-that-produces-an-enormous-tree 2)) Isn't doing this at the top level bad form? The purpose of a REPL is for interactive experimentation. I want to give names to the things I'm building so I can play with them in the REPL. Nothing bad form about that. Also I don't see how this isn't solved by modifying some habits. (defn test-tree [] (function-that-produces-an-enormous-tree 2)) (time (test-tree)) time prints out the value that is computed. The above example would suffer the same problem of printing out the tree at the REPL. You could do something like (time (do (test-tree) nil)) to suppress printing, but if you want to do further interactive manipulations to the tree, you'd end up recomputing it. So then, you get into workarounds involving delay. It starts to get ugly, I think. Clojure's ability to give names to things without printing the values is a feature I use every day in my interactive explorations. -- 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
