Implement getRange (returning an Iterable).

runtime/lib/array.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.
 
 
 // TODO(srdjan): Use shared array implementation.
 class _ObjectArray<E> implements List<E> {
 
   factory _ObjectArray(length) native "ObjectArray_allocate";
 
@@ skipping 42 matching lines @@
   void removeWhere(bool test(E element)) {
     throw new UnsupportedError(
         "Cannot remove element of a non-extendable array");
   }
 
   void retainWhere(bool test(E element)) {
     throw new UnsupportedError(
         "Cannot remove element of a non-extendable array");
   }
 
+  Iterable<E> getRange(int start, [int end]) {
+    return IterableMixinWorkaround.getRangeList(this, start, end);
+  }
+
   // List interface.
   void setRange(int start, int length, List<E> from, [int startFrom = 0]) {
     if (length < 0) {
       throw new ArgumentError("negative length $length");
     }
     if (from is _ObjectArray) {
       _copyFromObjectArray(from, startFrom, start, length);
     } else {
       Arrays.copy(from, startFrom, this, start, length);
     }
@@ skipping 14 matching lines @@
     Arrays.indicesCheck(this, start, end);
     if (end == null) end = this.length;
     int length = end - start;
     if (start == end) return [];
     List list = new _GrowableObjectArray<E>.withCapacity(length);
     list.length = length;
     Arrays.copy(this, start, list, 0, length);
     return list;
   }
 
-  List<E> getRange(int start, int length) => sublist(start, start + length);
-
   // Iterable interface.
 
   bool contains(E element) {
     return IterableMixinWorkaround.contains(this, element);
   }
 
   void forEach(f(E element)) {
     IterableMixinWorkaround.forEach(this, f);
   }
 
@@ skipping 225 matching lines @@
     Arrays.indicesCheck(this, start, end);
     if (end == null) end = this.length;
     int length = end - start;
     if (start == end) return [];
     List list = new List<E>();
     list.length = length;
     Arrays.copy(this, start, list, 0, length);
     return list;
   }
 
-  List<E> getRange(int start, int length) => sublist(start, start + length);
+  Iterable<E> getRange(int start, int end) {
+    return IterableMixinWorkaround.getRangeList(this, start, end);
+  }
 
   // Collection interface.
 
   bool contains(E element) {
     return IterableMixinWorkaround.contains(this, element);
   }
 
   void forEach(f(E element)) {
     IterableMixinWorkaround.forEach(this, f);
   }
@@ skipping 170 matching lines @@
     }
     _position = _length;
     _current = null;
     return false;
   }
 
   E get current {
     return _current;
   }
 }