/**
   * Replaces the part between <code>from</code> (inclusive) and <code>to</code> (inclusive) with
   * the other list's part between <code>otherFrom</code> and <code>otherTo</code>. Powerful (and
   * tricky) method! Both parts need not be of the same size (part A can both be smaller or larger
   * than part B). Parts may overlap. Receiver and other list may (but most not) be identical. If
   * <code>from &gt; to</code>, then inserts other part before <code>from</code>.
   *
   * @param from the first element of the receiver (inclusive)
   * @param to the last element of the receiver (inclusive)
   * @param other the other list (may be identical with receiver)
   * @param otherFrom the first element of the other list (inclusive)
   * @param otherTo the last element of the other list (inclusive)
   *     <p><b>Examples:</b>
   *     <pre>
   * a=[0, 1, 2, 3, 4, 5, 6, 7]
   * b=[50, 60, 70, 80, 90]
   * a.R(...)=a.replaceFromToWithFromTo(...)
   *
   * a.R(3,5,b,0,4)-->[0, 1, 2, 50, 60, 70, 80, 90, 6, 7]
   * a.R(1,6,b,0,4)-->[0, 50, 60, 70, 80, 90, 7]
   * a.R(0,6,b,0,4)-->[50, 60, 70, 80, 90, 7]
   * a.R(3,5,b,1,2)-->[0, 1, 2, 60, 70, 6, 7]
   * a.R(1,6,b,1,2)-->[0, 60, 70, 7]
   * a.R(0,6,b,1,2)-->[60, 70, 7]
   * a.R(5,3,b,0,4)-->[0, 1, 2, 3, 4, 50, 60, 70, 80, 90, 5, 6, 7]
   * a.R(5,0,b,0,4)-->[0, 1, 2, 3, 4, 50, 60, 70, 80, 90, 5, 6, 7]
   * a.R(5,3,b,1,2)-->[0, 1, 2, 3, 4, 60, 70, 5, 6, 7]
   * a.R(5,0,b,1,2)-->[0, 1, 2, 3, 4, 60, 70, 5, 6, 7]
   *
   * Extreme cases:
   * a.R(5,3,b,0,0)-->[0, 1, 2, 3, 4, 50, 5, 6, 7]
   * a.R(5,3,b,4,4)-->[0, 1, 2, 3, 4, 90, 5, 6, 7]
   * a.R(3,5,a,0,1)-->[0, 1, 2, 0, 1, 6, 7]
   * a.R(3,5,a,3,5)-->[0, 1, 2, 3, 4, 5, 6, 7]
   * a.R(3,5,a,4,4)-->[0, 1, 2, 4, 6, 7]
   * a.R(5,3,a,0,4)-->[0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 5, 6, 7]
   * a.R(0,-1,b,0,4)-->[50, 60, 70, 80, 90, 0, 1, 2, 3, 4, 5, 6, 7]
   * a.R(0,-1,a,0,4)-->[0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 5, 6, 7]
   * a.R(8,0,a,0,4)-->[0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2, 3, 4]
   * </pre>
   */
  public void replaceFromToWithFromTo(
      int from, int to, AbstractLongList other, int otherFrom, int otherTo) {
    if (otherFrom > otherTo) {
      throw new IndexOutOfBoundsException("otherFrom: " + otherFrom + ", otherTo: " + otherTo);
    }

    if (this == other && to - from != otherTo - otherFrom) { // avoid stumbling over my own feet
      replaceFromToWithFromTo(from, to, partFromTo(otherFrom, otherTo), 0, otherTo - otherFrom);
      return;
    }

    int length = otherTo - otherFrom + 1;
    int diff = length;
    int theLast = from - 1;

    if (to >= from) {
      diff -= (to - from + 1);
      theLast = to;
    }

    if (diff > 0) {
      beforeInsertDummies(theLast + 1, diff);
    } else {
      if (diff < 0) {
        removeFromTo(theLast + diff, theLast - 1);
      }
    }

    if (length > 0) {
      replaceFromToWithFrom(from, from + length - 1, other, otherFrom);
    }
  }
 /**
  * Inserts the specified element before the specified position into the receiver. Shifts the
  * element currently at that position (if any) and any subsequent elements to the right.
  *
  * @param index index before which the specified element is to be inserted (must be in [0,size]).
  * @param element element to be inserted.
  * @throws IndexOutOfBoundsException if <tt>index &lt; 0 || index &gt; size()</tt>.
  */
 public void beforeInsert(int index, long element) {
   beforeInsertDummies(index, 1);
   set(index, element);
 }