return StringUtil.EMPTY; // empty
        }

        String url = u;
        final String originalUrl = url;

        int idx = url.indexOf("://");
        if (idx >= 0) {
            url = url.substring(idx + 3);
        }

        idx = url.indexOf('/');
        if (idx >= 0) {
            url = url.substring(0, idx);
        }

        if (url.equals(originalUrl)) {

    if (occurrences == 0) {
      return count(element);
    }
    checkArgument(occurrences > 0, "occurrences cannot be negative: %s", occurrences);
    int entryIndex = backingMap.indexOf(element);
    if (entryIndex == -1) {
      backingMap.put(element, occurrences);
      size += occurrences;
      return 0;
    }
    int oldCount = backingMap.getValue(entryIndex);

  }

  public void testIndexOf() {
    assertThat(Ints.indexOf(EMPTY, (int) 1)).isEqualTo(-1);
    assertThat(Ints.indexOf(ARRAY1, (int) 2)).isEqualTo(-1);
    assertThat(Ints.indexOf(ARRAY234, (int) 1)).isEqualTo(-1);
    assertThat(Ints.indexOf(new int[] {(int) -1}, (int) -1)).isEqualTo(0);
    assertThat(Ints.indexOf(ARRAY234, (int) 2)).isEqualTo(0);
    assertThat(Ints.indexOf(ARRAY234, (int) 3)).isEqualTo(1);

    assertThat(Longs.indexOf(ARRAY1, ARRAY1)).isEqualTo(0);
    assertThat(Longs.indexOf(ARRAY234, ARRAY234)).isEqualTo(0);
    assertThat(Longs.indexOf(ARRAY234, new long[] {(long) 2, (long) 3})).isEqualTo(0);
    assertThat(Longs.indexOf(ARRAY234, new long[] {(long) 3, (long) 4})).isEqualTo(1);
    assertThat(Longs.indexOf(ARRAY234, new long[] {(long) 3})).isEqualTo(1);

  }

  @Override
  @ParametricNullness
  public E get(int index) {
    return delegate().get(index);
  }

  @Override
  public int indexOf(@CheckForNull Object element) {
    return delegate().indexOf(element);
  }

  @Override
  public int lastIndexOf(@CheckForNull Object element) {
    return delegate().lastIndexOf(element);
  }

  @Override

    assertThat(Booleans.indexOf(ARRAY_TRUE, new boolean[0])).isEqualTo(0);
  }

  public void testIndexOf_arrays() {
    assertThat(Booleans.indexOf(EMPTY, false)).isEqualTo(-1);
    assertThat(Booleans.indexOf(ARRAY_FALSE, true)).isEqualTo(-1);
    assertThat(Booleans.indexOf(ARRAY_FALSE_FALSE, true)).isEqualTo(-1);
    assertThat(Booleans.indexOf(ARRAY_FALSE, false)).isEqualTo(0);

                userInfo = URLDecoder.decode(userInfo);
                int index = userInfo.indexOf(':');
                user = (index != -1) ? userInfo.substring(0, index) : userInfo;
                if (index != -1) password = userInfo.substring(index + 1);
                index = user.indexOf('\\');
                if (index == -1) index = user.indexOf('/');
                domain = (index != -1) ? user.substring(0, index) : domain;

   *     such index exists.
   */
  public static int indexOf(boolean[] array, boolean target) {
    return indexOf(array, target, 0, array.length);
  }

  // TODO(kevinb): consider making this public
  private static int indexOf(boolean[] array, boolean target, int start, int end) {
    for (int i = start; i < end; i++) {
      if (array[i] == target) {

   *     such index exists.
   */
  public static int indexOf(boolean[] array, boolean target) {
    return indexOf(array, target, 0, array.length);
  }

  // TODO(kevinb): consider making this public
  private static int indexOf(boolean[] array, boolean target, int start, int end) {
    for (int i = start; i < end; i++) {
      if (array[i] == target) {

        list.addLast("1");
        list.addLast("2");
        list.addLast("3");
        assertThat(list.indexOf(null), is(0));
        assertThat(list.indexOf("1"), is(1));
        assertThat(list.indexOf("2"), is(2));
        assertThat(list.indexOf("3"), is(3));
        assertThat(list.indexOf("4"), is(-1));
    }