[amelius]

I tried Clojure, but immediately got the impression that the run-time type-system is ill-designed. I cannot recall the details, but I can remember odd things like different run-time types used for empty lists than for non-empty lists. A simple program doing a "switch" on some run-time types turned out to be really cluttered. But of course, there's always the possibility that I was doing something wrong :)

[bad_user]

In a dynamic language you're not supposed to rely on types, but on (dynamic) interfaces. Also Clojure, as a design choice, converts your collection into a lazy list when applying operators, then you need to convert it back if you want by using "into".