Fogus: What programming languages have you used professionally?
Hickey: Mainly C, C++, Java, C#, Common Lisp, and Clojure.
Fogus: What is your second favorite programming language?
Hickey: If I had been more satisfied with any of those, I wouldn’t have written Clojure. If I had to be stranded with something other than Clojure, **I’d be happiest with a good Common Lisp and its source code. If I had more free time, I’d spend it with Haskell.**