I was thinking more along the lines of a copy being necessary when you update a game state, or something like that. Is Clojure able to do something like that w

I was thinking more along the lines of a copy being necessary when you update a game state, or something like that. Is Clojure able to do something like that with partitioning? I think someone had tried doing a game in Clojure and run into problems with copies, and posted his findings to HN a number of years ago. Thanks for pointing out the use of persistent data structures, that is an interesting approach.