I wonder if there is mileage in saying at the top of the session: "If you are here for your first dojo and don't have a working Clojure development environment, then please join the "setup" group that will be mentored by [insert mentor volunteer here] so that those that have their environments already tuned can dive straight into the problem(s) that get voted up." Also, putting a few "howto" links for setting up Emacs + Cider, Cursive, Vi(m) for Clojure dev on the Meetup page(s) and encouraging people who are coming to a Dojo to be "ready to code" might be a good idea?

morning

Morning

Morn'

@maleghast all good suggestions....I'll post them in the London Clojurians organisers group

Morning 🙂 Cheers @agile_geek - When I am able to attend dojos again I will be happy to get people as up-and-running as I am with Emacs + Cider. I don't claim to be an expert, but I have a setup that allows me to be productive 😉

All help is welcome. TBH most people just starting either use LightTable NightCode or more often we do 4Clojure and just use the browser based REPL http://www.tryclj.com/

has anyone ever seen this problem when trying to start a clj uberjar Error: Invalid or corrupt jarfile ?

I can start the same jar (same md5) with out any problems on my local machine. but I get the above error on the test box. :thinking_face:

same jvm versions?

no, the working one is java 8, the failing one is java 7. I think that is the problem here.

unfortunately the sysadmin doesn't seem to be in today 😞

@rickmoynihan the practical sessions at def_shef are some of the best attended and rated

we usually split into pairs or larger, everyone does the same problem in any functional language, and then compare notes at the end

morning

morning

@thomas are you running the standalone version or the other one?

@thomas that's it then. You can adjust the class version output from the 8 one down to 7, to get you going for today

using --target on the javac cmd

good idea @tcoupland I'll give that a try

ok, not straight forward 😞 http://stackoverflow.com/questions/31452373/how-to-target-a-specific-version-of-java-when-making-an-uberjar-using-leiningen

updated the java version to 1.8... and now it works again. thank you for your help ( @tcoupland and @agile_geek )

hurray! 🙂

that sounds like the right solution