Hi. Can anyone suggest, what this horrible error might be caused by? http://dpaste.com/209ZJK8

@andrewboltachev: it looks like these are cljs warnings, you might want to ask in #C03S1L9DN, or even #C06DT2YSY, but it might be some require missing, or project.clj pointing to something weird

@richiardiandrea: ok, thanks. it's om-intermediate-template actually

so how would one go about flattening all but the deepest seq in seq of seqs?

say i want to go from [1 2 [3 [4 5] 6] [[[7 8] 9]]]

to [1 2 3 [4 5] 6 [7 8] 9]?

@triss: I think this could do the trick: simple way:

(defn f [v]
  (if (some coll? v)
    (into [] (mapcat #((if (coll? %) f vector) %)) v)
    [v]))

(defn g [v]
  (let [branch? #(and (coll? %) (some coll? %))]
    (->> (tree-seq branch? identity v)
         (into [] (remove branch?)))))

Does anyone know how this error reported by Tomcat 8.0.24 can be avoided?

16-Jan-2016 07:49:06.464 SEVERE [ContainerBackgroundProcessor[StandardEngine[Catalina]]] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [shell-command-executor-0.1.0-SNAPSHOT-standalone] created a ThreadLocal with key of type [clojure.lang.Var$1] (value [clojure.lang.Var$1@ce59370]) and a value of type [clojure.lang.Var.Frame] (value [clojure.lang.Var$Frame@639ad1cf]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.

Looks pretty similar to http://dev.clojure.org/jira/browse/CLJ-1125, @hans. It says it is fixed in clojure 1.6.0

@nberger: Right. Which is why I'm asking. I'm using clojure 1.7.0

Oh ok, no idea then

I had a nasty bug in my program because I was getting the common part with #(get %1 2) and it turns out that when the maps are different you get a list not a vector

is it normal ? it looks inconsistent to me

docstring says "tuple of [..]", vaguely implying a vector

@yenda: I'd say that qualifies as a bug, would you mind opening a ticket for this?

@bronsa ok on jira ?

yes

damn you can't edit a ticket on jira?

I did it too fast

I can edit it for you

@yenda: done, let me know if it's ok. Also, as a rule, don't use tags like "bug" or "feature" -- the ticket type is already about that

thank you

can I propose a patch ? i found the bugfix

sure. just make sure you have a CA signed and you use the correct patch format (using git format-patch)

read http://clojure.org/community/contributing here about all of that

apparently tests don't care what type of collection they get

sequential collections are compared regardless of type (so list / seq / vector are the same)

would it be ok to add these tests ?

so here’s a thing i’m tinkering with… considering finishing it up & submitting a CLJ/west talk about it: https://github.com/brandonbloom/metaclj — hopefully i find the time in the next week or two… feedback welcome

@bbloom please do!

Is that related to staging?

yeah, it is

it’s based on the “bracket” and “escape” operators from the staging literature, which are fancy versions of syntax-quote and unquote

Is that something similar to what metalua does with it's metalevels?

Getting on a flight, interesting as always @bbloom

@ghadi: thanks

Been banging on the new HAMTs today

jaen: not familiar with metalua, but http://terralang.org/index.html is what got me off my ass to take another look at metaclj

looking at http://metalua.luaforge.net/quicktour.html now, yeah, it looks similar to the +{ and -{ syntax

https://www.google.com/url?sa=t&source=web&rct=j&url=https://cr.yp.to/talks/2015.04.16/slides-djb-20150416-a4.pdf&ved=0ahUKEwjrxOigjq_KAhUBwWMKHfKOCYIQFggbMAA&usg=AFQjCNFaoWCWQdvW3tTuxvRtt8OWRwIAyw&sig2=Wn9xVOSJycoC-vThfgt2XA

Ugh sorry tracking link @bbloom

djb on the death of optimizing compilers

yeah i remember reading that

i’m a proponent of compilers that do only limited, obvious, predictable, optimizations

things you can meaningfully reason about and rely on

I have a clojure library which is published on clojars. Newly I have also added a command-line client [1] into it. It has -main and uses clojure.tools.cli. I wonder how to instruct people to use it. I can use it from command-line by entering java -jar dirac-0.1.0-standalone.jar when I have that uberjar built from sources, my question is how to use it from clojars.

the cross your fingers and hope approach of javascript jits is awful

I wasn’t able to find any docs about it on clojars

[1] https://github.com/binaryage/dirac/blob/master/src/agent/dirac/agent_cli.clj

@bbloom: that sounds interesting. If I understand what metlaua does properly it would make code like this evaluate instead of complaining about unquote being unbound?

(let [derp `(+ 2 2)]
  `(+ 2 ~(+ 2 ~derp)))

yeah, it should be possible to make that work

i haven’t done unquote yet in metaclj, but it would work just by calling eval … unless it’s inside my macro, then i can do something smarter

@darwin: then just do a bash script that downloads the jar and runs it, or just supply the download link to the jar

ghadi: ar har har

@bbloom: please do

@yenda: ok, sound good, I think mvn install is what I need, and then ask mvn to give me path to that standalone jar

http://stackoverflow.com/questions/10808898/install-jar-from-remote-repo-clojar

Yeah, I don't think Java land has something similar to Ruby where it takes executable files from bin in the gem and makes them available to run (not a Java expert though). Writing a shell script seems reasonable in this case.

@darwin unfortunately it's more complicated than this. mvn install takes a jar already on your file system and puts it into your local maven repository- assuming you have maven.

what you probably want is as @yenda said- a bash script that only assumes the presence of java and curl, downloads a jar, and then runs it, a la a simplified version of lein's bootstrap script: https://raw.githubusercontent.com/technomancy/leiningen/stable/bin/lein.

ok, thanks, will consider that

I wonder if there are any existing clojure libraries using this approach, or how they distribute cli clients?

AFAIK people use things like install4j

now, I have figured out direct clojars urls: https://clojars.org/repo/binaryage/dirac/0.1.0/ but is seems there are not -standalone.jar versions there (although I’m pretty sure lein deploy clojars was showing them being uploaded)

so I have probably another problem, how to run a jar, which has deps on its own

Look at capsule for packaging: https://github.com/circlespainter/lein-capsule

http://www.capsule.io/

you can use an uberjar- a packaging of a jar plus dependencies- but capsule offers nice ergonomic options

going to look into the capsule, thanks @jonahbenton

you want an uberjar

not just a jar @darwin

@yenda: lein uberjar produces both jar and uberjar for me, both get uploaded by lein deploy clojars but only jar will appear in the clojars repo

I think I have a promising path to success with maven

@darwin: the deploy task doesn't upload the uberjar by default, so you shouldn't see any notification about it being uploaded

have to download it first with deps: mvn dependency:get -DgroupId=binaryage -DartifactId=dirac -Dversion=0.1.0 then ask maven for classpaths for its deps and then execute java -cp $CLASS_PATH -jar $NON_STANDALONE_JAR_FROM_CLOJARS

and if it is uploaded, clojars does no filtering to prevent it from being in the repo

@tcrawley: ok, maybe I’m wrong / confused here, I just barely recall seeing it

following this SO post now: http://stackoverflow.com/a/12749243/84283

can anyone point to an example of how to use stylesheets in a clojurescript react native project? (did js react native stuff before, jumping in on a clojurescript project and all i see is inline styles)

@euwyn you may want to ask in #C03S1L9DN :)

just for the record, this is working script I ended up with: https://github.com/binaryage/dirac/blob/master/scripts/agent-launcher.sh

Hey everyone! What happens when a future is never dereferenced?… Or in other words, how safe is to execute some long task using a future if the result is never going to be used. For example, to save something in a database. Can I trust in that after the end of the task all resources are going to be freely available again?