The reason why Clojure is easy to teach on the job is that Clojure code base is small and code are very localized. It's impossible to be productive in a large

The reason why Clojure is easy to teach on the job is that Clojure code base is small and code are very localized. It's impossible to be productive in a large Java code base within a month even if you joined as a seasoned Java developer. But it is routine for a programmer who has not even heard of Clojure before to become productive in a production Clojure code base in two weeks. We do this all the time with our interns.