Method del

chapter24/src/main/java/com/seaofnodes/simple/util/Utils.java:16–19

Fast, constant-time, element removal. Does not preserve order @param array ArrayList to modify @param i element to be removed @return element removed

(ArrayList<E> array, int i)

     *  @return element removed
     */
    public static <E> void del(ArrayList<E> array, int i) {
        E last = array.removeLast();
        if (i < array.size()) array.set(i, last);
    }

    /**
     * Search a list for an element by reference