Update Timer API to take the callback as the last parameter.

samples/socket/SocketExample.dart

-// Copyright (c) 2011, 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.
-
-/**
- * Shows how to use Socket, ServerSocket and InputStream.
- *
- * (This deliberately sends data slowly, to show how InputStream can be
- * read from asynchronously.)
- */
-class SocketExample {
-
-  int bytesSent = 0;
-  int bytesReceived = 0;
-  final int bytesTotal = 8;
-  final String host = "127.0.0.1";
-  ServerSocket serverSocket;
-  Socket sendSocket;
-  Socket receiveSocket;
-  InputStream inputStream;
-  List receiveBuffer;
-
-  SocketExample() {
-    // fixed size buffer we use to read from the InputStream
-    receiveBuffer = new List(4);
-  }
-
-  void go() {
-    // initialize the server
-    serverSocket = new ServerSocket(host, 0, 5);
-    if (serverSocket == null) {
-      throw "can't get server socket";
-    }
-    serverSocket.connectionHandler = onConnect;
-    print("accepting connections on ${host}:${serverSocket.port}");
-
-    // initialize the sender
-    sendSocket = new Socket(host, serverSocket.port);
-    if (sendSocket == null) {
-      throw "can't get send socket";
-    }
-
-    // send first 4 bytes immediately
-    for (int i = 0; i < 4; i++) {
-      sendByte();
-    }
-
-    // send next 4 bytes slowly
-    new Timer.repeating((Timer t) {
-      sendByte();
-      if (bytesSent == bytesTotal) {
-        sendSocket.close();
-        t.cancel();
-        print("finished sending");
-      }
-    }, 500);
-  }
-
-  void onConnect(Socket connection) {
-    receiveSocket = connection;
-    inputStream = receiveSocket.inputStream;
-    inputStream.dataHandler = receiveBytes;
-  }
-
-  void sendByte() {
-    sendSocket.writeList(const [65], 0, 1);
-    bytesSent++;
-    print("sending byte " + bytesSent.toString());
-  }
-
-  void receiveBytes() {
-    int numBytes = inputStream.readInto(receiveBuffer, 0, 4);
-    if (numBytes == 0) {
-      return;
-    }
-
-    bytesReceived += numBytes;
-    print("received ${numBytes} bytes (${bytesReceived} bytes total)");
-    if (bytesReceived >= bytesTotal) {
-      receiveSocket.close();
-      serverSocket.close();
-      print("done");
-    }
-  }
-}
-
-void main() => new SocketExample().go();