Question

Is it possible to iterate the time between an interval’s beginning and ending date, one day at a time? Using the clj-time library for Clojure would be fine as well!

Answer 1

Yep.

Something like this:

DateTime now = DateTime.now();
DateTime start = now;
DateTime stop = now.plusDays(10);
DateTime inter = start;
// Loop through each day in the span
while (inter.compareTo(stop) < 0) {
    System.out.println(inter);
    // Go to next
    inter = inter.plusDays(1);
}

Additionally, here’s the implementation for Clojure’s clj-time:

(defn date-interval
  ([start end] (date-interval start end []))
  ([start end interval]
   (if (time/after? start end)
     interval
     (recur (time/plus start (time/days 1)) end (concat interval [start])))))