Refactor removeRange.

sdk/lib/core/list.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.core;
 
 /**
  * A [List] is an indexable collection with a length.
  *
  * A `List` implementation can choose not to support all methods
@@ skipping 224 matching lines @@
    * Returns an [Iterable] that iterators over the elements in the range
    * [start] to [end] (exclusive). The result of this function is backed by
    * `this`.
    *
    * It is an error if [end] is before [start].
    */
   Iterable<E> getRange(int start, int end);
 
   /**
    * Copies the elements of [from], starting
-   * at [startFrom], into the range [start] - [end] of `this`.
+   * at [startFrom], into the range [start] - [end] (excluding) of `this`.
    *
    * If [start] equals [end], this method does not do anything.
    *
    * It is an error if [start]..[end] is not a valid range pointing into the
    * `this`.
    *
    * It is an error if [startFrom] does not point into [from], or if [from]
    * does not have enough elements.
    */
   void setRange(int start, int end, List<E> from, [int startFrom]);
 
   /**
-   * Removes [length] elements from the list, beginning at [start].
-   * Throws an [UnsupportedError] if the list is
-   * not extendable.
-   * If [length] is 0, this method does not do anything.
-   * Throws an [ArgumentError] if [length] is negative.
-   * Throws an [RangeError] if [start] or
-   * [:start + length: - 1] are out of range.
+   * Removes the elements in the range [start]..[end] (excluding).
+   *
+   * It is an error if [start]..[end] is not a valid range pointing into the
+   * `this`.
    */
-  void removeRange(int start, int length);
+  void removeRange(int start, int end);
 
   /**
    * Inserts a new range into the list, starting from [start] to
    * [:start + length - 1:]. The entries are filled with [fill].
    * Throws an [UnsupportedError] if the list is
    * not extendable.
    * If [length] is 0, this method does not do anything.
    * If [start] is the length of the list, this method inserts the
    * range at the end of the list.
    * Throws an [ArgumentError] if [length] is negative.
    * Throws an [RangeError] if [start] is negative or if
    * [start] is greater than the length of the list.
    */
   void insertRange(int start, int length, [E fill]);
 
   /**
    * Returns an unmodifiable [Map] view of `this`.
    *
    * It has the indices of this list as keys, and the corresponding elements
    * as values.
    */
   Map<int, E> asMap();
 }