I'll second Clojure not just for the data structures but also because of the high level functions the standard library ships with. Things like `partition`, `cy

I'll second Clojure not just for the data structures but also because of the high level functions the standard library ships with. Things like `partition`, `cycle` or `repeat` have come in so handy when working with segments of lists or the Conway's Game-of-Life type puzzles.