相关疑难解决方法(0)

任何想法????应该是什么？内置了吗？完成这项任务的最佳方法是什么？

(def v ["one" "two" "three" "two"])

(defn find-thing [ thing vectr ]
  (????))

(find-thing "two" v) ; ? maybe 1, maybe '(1,3), actually probably a lazy-seq