To give some more context, 'persistent data structures' is a standard term in the literature. The use of efficient persistent maps in Clojure, and the fact Ric

To give some more context, 'persistent data structures' is a standard term in the literature. The use of efficient persistent maps in Clojure, and the fact Rich Hickey explains that in most of the early Clojure introductory talks, has popularised it outside of academia.