Re: Clojure and the Anti-If Campaign
Benny Tsai benny.t...@gmail.com writes: There's while in clojure.core; would that work? That would be cheating: --8---cut here---start-8--- user (macroexpand '(while (foo) (bar))) (loop* [] (clojure.core/when (foo) (bar) (recur))) --8---cut here---end---8--- And of course, `when` expands to an `if` again. On Tuesday, May 29, 2012 8:13:24 AM UTC-7, Andrew wrote: Thanks for sharing your blog post. Is there an Anti-If alternative to loop/recur in a situation where you have to poll for a condition to be true? (Seems to me that this necessitates some kind of conditional statement) If the value checked by the predicate is held in some clojure reference type, you can add a watch function (`add-watch`). You still need to test the predicate in the watch function, but at least you don't need to do polling, because the watch function will only be called when the value changes. Bye, Tassilo -- 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: Recursive lets
I agree with the other commenters that letfn is good when you can use it, but here you can't use it. Your general approach is really the best you can do, though it's nicer to use promise/deliver than atom/ swap!, since these values are never going to change again. I was looking for something equivalent to letrec in scheme. (Which allows slightly more than let or letfn) But your idea of a promise/deliver is nicer than my atom/reset!: it expresses the idea of closing the loop better. Thanks again. Nicolas. -- 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: Clojurians in Austria
Thanks for replies! I've created a group at https://groups.google.com/forum/#!forum/clojure-at Feel free to join :) Best, Jozef On Tuesday, May 29, 2012 7:20:02 PM UTC+2, bsmith.occs wrote: I too am in Vienna. I use Clojure at work for a few small internal tools, but not in production. I'd be glad to meet some other Clojurists. // Ben On Tue, May 29, 2012 at 5:05 PM, Nuno Marques wrote: I'm in Vienna and I know a couple of more Clojure people here. I would be happy to help start a clojure group here. On May 29, 2012, at 4:40 PM, Florian Over wrote: Hi i met a nice guy (David from intermaps.com) from Vienna on EuroClojure. He mentioned that there are other Clojure-User in Vienna as well. But no UserGroup right now. Maybe you can start irc clojure-at ? Florian 2012/5/29 Jozef Wagner : Hi, Are there some Clojurians from Austria or is there an Austria Clojure group? I'm looking for a Clojure related job in Austria, and so far I haven't found any Austrian group on meetup.com nor on the google groups :( Best, Jozef -- 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: Clojurians in Austria
There was a How to build communities session at EuroClojure. In summary: - Just get going. Find some people (with 3 your already a group), find a place (like a pub for starters) and meet. You'll like it! - Meet regularly e.g. monthly. - If you want to do some coding and your group grows, find a space (Vienna has at least one Hackerspace - metalab - that might work. In Berlin we meet at an office of one of our members) - When the group grows, experiment with different schemes for your events. London does Dojos a la http://www.ntoll.org/how-to-run-an-awesome-code-dojo.html. Here in Berlin we've occasonially had talks, but favour *doing* something with code. 4clojure.com has loads of interesting problems to hack on. - Food and beverages are nice but not the key aspect ;) Good luck for your endeavour! Jozef Wagner jozef.wag...@gmail.com writes: Thanks for replies! I've created a group at https://groups.google.com/forum/#!forum/clojure-at Feel free to join :) Best, Jozef On Tuesday, May 29, 2012 7:20:02 PM UTC+2, bsmith.occs wrote: I too am in Vienna. I use Clojure at work for a few small internal tools, but not in production. I'd be glad to meet some other Clojurists. // Ben On Tue, May 29, 2012 at 5:05 PM, Nuno Marques wrote: I'm in Vienna and I know a couple of more Clojure people here. I would be happy to help start a clojure group here. On May 29, 2012, at 4:40 PM, Florian Over wrote: Hi i met a nice guy (David from intermaps.com) from Vienna on EuroClojure. He mentioned that there are other Clojure-User in Vienna as well. But no UserGroup right now. Maybe you can start irc clojure-at ? Florian 2012/5/29 Jozef Wagner : Hi, Are there some Clojurians from Austria or is there an Austria Clojure group? I'm looking for a Clojure related job in Austria, and so far I haven't found any Austrian group on meetup.com nor on the google groups :( Best, Jozef -- 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
Tracking ClojureScript Performance
Brian Taylor has put together a pretty awesome resource for tracking ClojureScript performance: http://50ply.com/cljs-bench If there's a particular aspect of your ClojureScript application that you're finding unbearably slow you can contribute a benchmark here: http://github.com/netguy204/cljs-bench 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 do I suppress warnings in a Clojurescript compilation?
It sounds to me like you're using a plain JavaScriupt file as an externs
definition. If that's the case, one way to get rid of the warnings is to
clean up the externs file so that it only contains the function/variable
names that are meant to be publicly used. As an example, here's the
externs file for jquery:
https://github.com/ibdknox/jayq/blob/master/resources/externs/jquery.js .
On Wednesday, May 30, 2012 12:15:35 PM UTC-7, Stephen Cagle wrote:
When I compile in advanced mode, I get thousands of warnings of the nature
May 30, 2012 11:22:23 AM com.google.javascript.jscomp.LoggerErrorManager
println
WARNING: /Users/stephen/work/rpc/jquery-1.7.2.min.js:2: WARNING -
accessing name a in externs has no effect
function cu(a){if(!cj[a]){var
b=c.body,d=f(+a+).appendTo(b),e=d.css(display);d.remove();if(e===none||e===){ck||(ck=c.createElement(iframe),ck.frameBorder=ck.width=ck.height=0),b.appendChild(ck);if(!cl||!ck.createElement)cl=(ck.contentWindow||ck.contentDocument).document,cl.write((f.support.boxModel?!doctype
html:)+htmlbody),cl.close();d=cl.createElement(a),cl.body.a...
(It goes on for around a hundred something lines)
Where 'a' can be any variable. This results in wall clock compilation time
of 63 minutes, but user compilation time of 4 minutes (if I remember
correctly). My java processor usage is hovering at just a few percentage
points.
I assume this means that it is spending all its time printing out these
warning messages to me. Is there way in my project file to tell
Clojurescript to not print the warnings?
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Simultaneous use of the same dynamic binding
I see a lot of clojure libraries use the pattern where an implicit variable is stored as a dynamic variable. A good example is clojure.java.jdbc: (require '[clojure.java.jdbc :as sql]) (sql/with-connection db-spec sql code here) What do I do if I have to instantiate two things that uses the same dynamic binding at the same time. Using the java.jdbc example, what if I wanted to run multiple selects from db-1 and insert each result into db-2? Do I need keep calling (sql/with-connection db-2 ...) after each select from db-1? -- 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 do I suppress warnings in a Clojurescript compilation?
David,
I am depending on lein-cljsbuild 0.1.10
I am compiling by typing lein cljsbuild once
This is the content of my project.clj's cljsbuild section:
:cljsbuild {:crossovers [rpc.tree]
:builds [{:source-path src/rpc/client
:compiler {:output-to resources/public/main.js
:optimizations :advanced
:externs [jquery-1.7.2.min.js]
:pretty-print true}}]}
Evan,
Yes, I imagine that would fix it, as jayqe is the dependency I am using
that seems to cause these issues. I know nothing about it, but is it
unreasonable to expect the closure compiler to just figure it out for
itself? Will modifying the jquery code manually generate substantially
different code than letting closure figure out which jquery resources I am
actually using? I am curious.
On Wednesday, May 30, 2012 1:33:25 PM UTC-7, Evan Mezeske wrote:
It sounds to me like you're using a plain JavaScriupt file as an externs
definition. If that's the case, one way to get rid of the warnings is to
clean up the externs file so that it only contains the function/variable
names that are meant to be publicly used. As an example, here's the
externs file for jquery:
https://github.com/ibdknox/jayq/blob/master/resources/externs/jquery.js .
On Wednesday, May 30, 2012 12:15:35 PM UTC-7, Stephen Cagle wrote:
When I compile in advanced mode, I get thousands of warnings of the nature
May 30, 2012 11:22:23 AM com.google.javascript.jscomp.LoggerErrorManager
println
WARNING: /Users/stephen/work/rpc/jquery-1.7.2.min.js:2: WARNING -
accessing name a in externs has no effect
function cu(a){if(!cj[a]){var
b=c.body,d=f(+a+).appendTo(b),e=d.css(display);d.remove();if(e===none||e===){ck||(ck=c.createElement(iframe),ck.frameBorder=ck.width=ck.height=0),b.appendChild(ck);if(!cl||!ck.createElement)cl=(ck.contentWindow||ck.contentDocument).document,cl.write((f.support.boxModel?!doctype
html:)+htmlbody),cl.close();d=cl.createElement(a),cl.body.a...
(It goes on for around a hundred something lines)
Where 'a' can be any variable. This results in wall clock compilation
time of 63 minutes, but user compilation time of 4 minutes (if I remember
correctly). My java processor usage is hovering at just a few percentage
points.
I assume this means that it is spending all its time printing out these
warning messages to me. Is there way in my project file to tell
Clojurescript to not print the warnings?
--
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Note that posts from new members are moderated - please be patient with your
first post.
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Re: Simultaneous use of the same dynamic binding
On Wed, May 30, 2012 at 3:26 PM, Gerrard McNulty gerrard.mcnu...@gmail.com wrote: I see a lot of clojure libraries use the pattern where an implicit variable is stored as a dynamic variable. A good example is clojure.java.jdbc: I wouldn't say it's a good example. It's certainly an example of this pattern. What do I do if I have to instantiate two things that uses the same dynamic binding at the same time. Using the java.jdbc example, what if I wanted to run multiple selects from db-1 and insert each result into db-2? Do I need keep calling (sql/with-connection db-2 ...) after each select from db-1? No, you'd need to doall on the selects from db-1 and lift the results out and then pass them into inserts on db-2. Your example is partly why this practice of binding dynamic variables as implicit variables is poor: it doesn't compose. Coming soon to clojure.java.jdbc: an API where you can pass the db connection directly into every operation. -- 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: Simultaneous use of the same dynamic binding
What do I do if I have to instantiate two things that uses the same dynamic binding at the same time. Using the java.jdbc example, what if I wanted to run multiple selects from db-1 and insert each result into db-2? Do I need keep calling (sql/with-connection db-2 ...) after each select from db-1? Your example is partly why this practice of binding dynamic variables as implicit variables is poor: it doesn't compose. Note that Korma gets around this somewhat by tying the database to use to the table definition. It's effectively the same thing as doall and lifting the results, but at least it doesn't have any syntactic overhead. jack. -- 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 do I suppress warnings in a Clojurescript compilation?
Unfortunately, I have not been able to find even a decent resource on the
general topic of creating extern definition files. So, please take this
with a grain of salt, and let's hope someone more knowledgeable can come
along and clear things up.
My belief is that using an unmodified JS file as an externs file will most
likely result in an overeager list of unmanglable names being used when
minifying your compiled JS. There's plenty of names mentioned in the
jQuery sources that are not meant to be called publicly, and I expect that
the closure compiler doesn't know that.
Another problem arises due the extremely dynamic nature of JS -- it's not
possible statically to tell what fields an object might have, since they
can be added dynamically, etc. It would be trivial to write a contrived
example where the compiler couldn't know not to mangle a particular name.
Aaaanyway, the best solution for your specific case is to just change your
:externs to [externs/jquery.js]. The jayq JAR contains this resource,
and it has already been hand-built to be used as an externs file.
On Wednesday, May 30, 2012 6:46:17 PM UTC-7, Stephen Cagle wrote:
David,
I am depending on lein-cljsbuild 0.1.10
I am compiling by typing lein cljsbuild once
This is the content of my project.clj's cljsbuild section:
:cljsbuild {:crossovers [rpc.tree]
:builds [{:source-path src/rpc/client
:compiler {:output-to resources/public/main.js
:optimizations :advanced
:externs [jquery-1.7.2.min.js]
:pretty-print true}}]}
Evan,
Yes, I imagine that would fix it, as jayqe is the dependency I am using
that seems to cause these issues. I know nothing about it, but is it
unreasonable to expect the closure compiler to just figure it out for
itself? Will modifying the jquery code manually generate substantially
different code than letting closure figure out which jquery resources I am
actually using? I am curious.
On Wednesday, May 30, 2012 1:33:25 PM UTC-7, Evan Mezeske wrote:
It sounds to me like you're using a plain JavaScriupt file as an externs
definition. If that's the case, one way to get rid of the warnings is to
clean up the externs file so that it only contains the function/variable
names that are meant to be publicly used. As an example, here's the
externs file for jquery:
https://github.com/ibdknox/jayq/blob/master/resources/externs/jquery.js .
On Wednesday, May 30, 2012 12:15:35 PM UTC-7, Stephen Cagle wrote:
When I compile in advanced mode, I get thousands of warnings of the
nature
May 30, 2012 11:22:23 AM com.google.javascript.jscomp.LoggerErrorManager
println
WARNING: /Users/stephen/work/rpc/jquery-1.7.2.min.js:2: WARNING -
accessing name a in externs has no effect
function cu(a){if(!cj[a]){var
b=c.body,d=f(+a+).appendTo(b),e=d.css(display);d.remove();if(e===none||e===){ck||(ck=c.createElement(iframe),ck.frameBorder=ck.width=ck.height=0),b.appendChild(ck);if(!cl||!ck.createElement)cl=(ck.contentWindow||ck.contentDocument).document,cl.write((f.support.boxModel?!doctype
html:)+htmlbody),cl.close();d=cl.createElement(a),cl.body.a...
(It goes on for around a hundred something lines)
Where 'a' can be any variable. This results in wall clock compilation
time of 63 minutes, but user compilation time of 4 minutes (if I remember
correctly). My java processor usage is hovering at just a few percentage
points.
I assume this means that it is spending all its time printing out these
warning messages to me. Is there way in my project file to tell
Clojurescript to not print the warnings?
--
You received this message because you are subscribed to the Google
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Note that posts from new members are moderated - please be patient with your
first post.
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For more options, visit this group at
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Re: How do I suppress warnings in a Clojurescript compilation?
I also meant to mention that there are a ton of knobs on the closure compiler that are not exposed by the ClojureScript compiler. This is something I'd like to improve (or see improved) at some point, but it's a tricky problem, due to the vast number of options [1]. I expect the only way to really expose them all would be to add a hook where user code could set the options object before compiling. It does look like there is an option that *might* disable the warnings you're seeing: DiagnosticGroups.EXTERNS_VALIDATION [2]. I haven't tested this, so I'm not sure if it would quiet down the X has no effect messages or not. At any rate, there's no easy way to tweak this setting with ClojureScript. [1] http://code.google.com/p/closure-compiler/source/browse/trunk/src/com/google/javascript/jscomp/CompilerOptions.java [2] http://code.google.com/p/closure-compiler/wiki/Warnings -- 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
