This is monumentally difficult to answer when the question is presented so generally. • What are you trying to accomplish? • Which language has superior/more l

This is monumentally difficult to answer when the question is presented so generally. • What are you trying to accomplish? • Which language has superior/more libraries for your task? • Which language is more amenable to creating further libraries if needed? • Which operating system are you working on? • Are you doing server-side or client-side work? Web applications or desktop software? • If server, does yours have a particular tie with one or the other language? (example: specializing in RoR) • Are you working with a team? Which do they know better? • Which do you know better? • Are you going to iterate your code a lot or do a one-off project that doesn't need updating? • Do you know other tools/languages that stack well with one or the other? Which language complements your coding habits more adequately? • Do you need to have a high-performance application or can you sacrifice that for versatility and readability? etc. etc. etc...and you could double that list easily.