Make first and last getters.

samples/calculator/tape.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.
 
 class Tape {
   static const int OP_NOOP = 0;
   static const int OP_PLUS = 1;
   static const int OP_MINUS = 2;
   static const int OP_MULTI = 3;
   static const int OP_DIV = 4;
@@ skipping 203 matching lines @@
   void clearTotal() {
     final element = new Element.tag('div');
 
     element.innerHTML = tapeUI.clearCalculation();
     tapeUI.tape.elements.add(element.elements[0]);
 
     scrollToTapeBottom();
   }
 
   bool get isClear {
-    return tapeUI.tape.elements.last().classes.contains(TapeUI.clearCalc);
+    return tapeUI.tape.elements.last.classes.contains(TapeUI.clearCalc);
   }
 
   void clearTape() {
     tapeUI.tape.elements.clear();
 
     SettingsDialog settingsUI = new SettingsDialog();
     tapeUI.tape.elements.add(settingsUI.root);
     mySettings = new Settings(settingsUI, Settings.THEME_BUTTON);
   }
 
   DivElement get activeInput => window.document.query("#activeInput");
   DivElement get activeTotal => window.document.query("#activeTotal");
 
   void clear() {
     final element = new Element.tag('div');
     element.innerHTML = tapeUI.clearCalculation();
     tapeUI.tape.elements.add(element.elements[0]);
   }
 }