Make first and last getters.

utils/pub/io.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.
 
 /**
  * Helper functionality to make working with IO easier.
  */
 library io;
 
 import 'dart:io';
@@ skipping 26 matching lines @@
  * [File] objects.
  */
 String join(part1, [part2, part3, part4]) {
   final parts = _getPath(part1).replaceAll('\\', '/').split('/');
 
   for (final part in [part2, part3, part4]) {
     if (part == null) continue;
 
     for (final piece in _getPath(part).split('/')) {
       if (piece == '..' && parts.length > 0 &&
-          parts.last() != '.' && parts.last() != '..') {
+          parts.last != '.' && parts.last != '..') {
         parts.removeLast();
       } else if (piece != '') {
-        if (parts.length > 0 && parts.last() == '.') {
+        if (parts.length > 0 && parts.last == '.') {
           parts.removeLast();
         }
         parts.add(piece);
       }
     }
   }
 
   return Strings.join(parts, Platform.pathSeparator);
 }
 
@@ skipping 438 matching lines @@
   if (workingDir != null) {
     options.workingDirectory = _getDirectory(workingDir).path;
   }
   options.environment = environment;
 
   var future = Process.run(executable, args, options);
   return future.transform((result) {
     // TODO(rnystrom): Remove this and change to returning one string.
     List<String> toLines(String output) {
       var lines = output.split(NEWLINE_PATTERN);
-      if (!lines.isEmpty && lines.last() == "") lines.removeLast();
+      if (!lines.isEmpty && lines.last == "") lines.removeLast();
       return lines;
     }
     return new PubProcessResult(toLines(result.stdout),
                                 toLines(result.stderr),
                                 result.exitCode);
   });
 }
 
 /**
  * Wraps [input] to provide a timeout. If [input] completes before
@@ skipping 228 matching lines @@
   return new Directory(entry);
 }
 
 /**
  * Gets a [Uri] for [uri], which can either already be one, or be a [String].
  */
 Uri _getUri(uri) {
   if (uri is Uri) return uri;
   return new Uri.fromString(uri);
 }