Method indexMap

corpus/java/training/guava/collect/Maps.java:4134–4141

Returns a map from the ith element of list to i.

(Collection<E> list)

   * Returns a map from the ith element of list to i.
   */
  static <E> ImmutableMap<E, Integer> indexMap(Collection<E> list) {
    ImmutableMap.Builder<E, Integer> builder = new ImmutableMap.Builder<E, Integer>(list.size());
    int i = 0;
    for (E e : list) {
      builder.put(e, i++);
    }
    return builder.build();
  }

  /**
   * Returns a view of the portion of {@code map} whose keys are contained by {@code range}.