Try Dart 1 hour experience first draft

src/site/articles/trydart/examples/7-piratebadge_json/piratebadge.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.
+
+
+// Demonstrates:
+// list, random, string interpolation, cascade, fat arrow,
+// named constructors.
+// optional parameters.
+// getters, setters,
+// httprequest, JSON
+// static methods/fields
+// cascades (onclick listen...piratename.male.name
+
+import 'dart:html';
+import 'dart:math';
+import 'dart:convert';
+
+InputElement inputNameElement;
+ButtonElement genButtonElement;
+
+bool useRandomName = false;
+
+RadioButtonInputElement captainRadioElement;
+RadioButtonInputElement scallywagRadioElement;
+
+void  main() {
+  inputNameElement = query('#inputName');
+  inputNameElement.onChange.listen(generateBadge);
+
+  genButtonElement = query('#generateButton');
+  genButtonElement.onClick.listen(generateBadge);
+
+  query('#useRandomName').onClick.listen(useRandomNameClickHandler);
+
+  captainRadioElement = query('#captain');
+  scallywagRadioElement = query('#scallywag');
+
+  PirateName.initialize();
+}
+
+void generateBadge(Event event) { 
+  if (!useRandomName) {
+    query('#badgeName').text = new PirateName(firstName: inputNameElement.value).name;
+  } else if (scallywagRadioElement.checked) {
+    query('#badgeName').text = new PirateName.scallywag().name;
+  } else {
+    query('#badgeName').text = new PirateName.captain().name;
+  }
+}
+
+void useRandomNameClickHandler(MouseEvent e) { 
+  if ((e.target as CheckboxInputElement).checked) {
+    genButtonElement.disabled = false;
+    captainRadioElement.disabled = false;
+    scallywagRadioElement.disabled = false;
+    inputNameElement
+        ..disabled = true
+        ..value = ''
+        ..placeholder = '';
+    useRandomName = true;
+  } else {
+    genButtonElement.disabled = true;
+    captainRadioElement.disabled = true;
+    scallywagRadioElement.disabled = true;
+    inputNameElement
+        ..disabled = false
+        ..placeholder = 'Your name here';
+    useRandomName = false;
+  }
+}
+  
+//library models;
+class PirateName {
+  
+  Random indexGen = new Random();
+  
+  String _pirateName;
+  
+  String get name => _pirateName;
+         set name(String value) => _pirateName = value;
+         
+  String toString() => name;
+
+  PirateName({String firstName}) {
+    if (firstName == null) {
+      firstName = names[indexGen.nextInt(names.length)];
+    }
+    _pirateName = '$firstName';
+  }
+
+  PirateName.captain() {
+    String firstName = names[indexGen.nextInt(names.length)];
+    String appellation = captains[indexGen.nextInt(captains.length)];
+    _pirateName = '$firstName the $appellation';
+  }
+
+  PirateName.scallywag() {
+    String firstName = names[indexGen.nextInt(names.length)];
+    String appellation = scallywags[indexGen.nextInt(scallywags.length)];
+    _pirateName = '$firstName the $appellation';
+  }
+
+  static List<String> names = [];
+  static List<String> captains = [];
+  static List<String> scallywags = [];
+
+  static void initialize() {
+    makeRequest();
+  }
+  
+  static void makeRequest(/*Event e*/) {
+    var path = 'piratenames.json';
+    HttpRequest.getString(path)
+      .then(processString)
+        .catchError(handleError);
+  }
+
+  static handleError(Exception error) {
+    print('Request failed.');
+  }
+
+  static processString(String jsonString) {
+    List<List> pirateNames = JSON.decode(jsonString);
+    names = pirateNames[0];
+    captains = pirateNames[1];
+    scallywags = pirateNames[2];
+  }
+}