/* Create a bag of fruit */
fruit = .bag~of("Apple", "Orange", "Apple", "Pear")
say fruit~items          /* How many pieces? (4)      */
say fruit~items("Apple") /* How many apples? (2)      */
fruit~remove("Apple")    /* Remove one of the apples. */
fruit~~put("Banana")~put("Orange") /* Add a couple.   */
say fruit~items          /* How many pieces? (5)      */