Final CL to kill off client/samples .

client/samples/swarm/BiIterator.dart

-/**
- * An iterator that allows the user to move forward and backward though
- * a set of items. (Bi-directional)
- */
-class BiIterator<E> {
-  
-  /** 
-   * Provides forward and backward iterator functionality to keep track
-   * which item is currently selected.
-   */
-  ObservableValue<int> currentIndex;
-
-  /** 
-   * The collection of items we will be iterating through.
-   */
-  List<E> list;
-
-  BiIterator(this.list, [List<ChangeListener> oldListeners = null])
-    : currentIndex = new ObservableValue<int>(0) {
-    if (oldListeners != null) {
-      currentIndex.listeners = oldListeners;
-    }
-  }
-
-  /** 
-   * Returns the next section from the sections, given the current 
-   * position. Returns the last source if there is no next section.
-   */
-  E next() {
-    if (currentIndex.value < list.length - 1) {
-      currentIndex.value += 1;
-    }
-    return list[currentIndex.value];
-  }
-
-  /** 
-   * Returns the current Section (page in the UI) that the user is 
-   * looking at.
-   */
-  E get current() {
-    return list[currentIndex.value];
-  }
-
-  /** 
-   * Returns the previous section from the sections, given the current 
-   * position. Returns the front section if we are already at the front of 
-   * the list.
-   */
-  E previous() {
-    if (currentIndex.value > 0) {
-      currentIndex.value -= 1;
-    }
-    return list[currentIndex.value];
-  }
-
-  /** 
-   * Move the iterator pointer over so that it points to a given list item.
-   */
-  void jumpToValue(E val) {
-    for (int i = 0; i < list.length; i++) {
-      if (list[i] === val) {
-        currentIndex.value = i;
-        break;
-      }
-    }
-  }
-}