sorted-set

(sorted-set x ...)

clojure.core/sorted-set: a set of the given members ordered by compare, so it prints and seqs in order. A member that compares equal to an earlier one is dropped (the earlier stays). Every set verb takes it and answers a sorted set again (conj, disj, into, clojure.set/union growing it ...); membership is by compare, so (contains? (sorted-set 1) 1.0) is true. A member compare does not order signals the oracle's Default comparator requires nil, Number, or Comparable. It is = to a hash set of the same members. As a value a function of any number of arguments.