Clojure:
比较两个日期

(require '[clj-time.core :as time])
(require '[clj-time.coerce :as coerce])

(let [date1 (time/date-time 2021 3 10)
      date2 (time/date-time 2023 2 20)]
  {:date1 date1
   :date2 date2
   :after? (time/after? date1 date2)
   :before? (time/before? date1 date2)
   :equal? (time/equal? date1 date2)})
   
;; 输出: {:date1 #object[org.joda.time.DateTime 0x4767c20a "2021-03-10T00:00:00.000Z"],
;;       :date2 #object[org.joda.time.DateTime 0x20453aee "2023-02-20T00:00:00.000Z"],
;;       :after? false,
;;       :before? true,
;;       :equal? false}