one-liners for the remaining top-50 dart:core classes

sdk/lib/core/object.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.
 
 part of dart.core;
 
 /**
- * Everything in Dart is an [Object].
+ * The base class for all Dart objects.
+ *
+ * Because Object is the root of the Dart class hierarchy,

[Lasse Reichstein Nielsen, 2016/08/31 18:57:36]

`Object`

+ * every other Dart class is a subclass of Object.
+ *
+ * When you define a class, you should override [toString]
+ * to return a string describing an instance of that class.
+ * You might also need to define [hashCode] and [==], as described in the
+ * [Implementing map keys]
+ * (http://www.dartlang.org/docs/dart-up-and-running/contents/ch03.html#ch03-implementing-map-keys)
+ * section of the [library tour]
+ * (http://www.dartlang.org/docs/dart-up-and-running/contents/ch03.html).
  */
 class Object {
   /**
    * Creates a new [Object] instance.
    *
    * [Object] instances have no meaningful state, and are only useful
    * through their identity. An [Object] instance is equal to itself
    * only.
    */
   const Object();
@@ skipping 58 matching lines @@
    * [noSuchMethodError].
    */
   external dynamic noSuchMethod(Invocation invocation);
 
   /**
    * A representation of the runtime type of the object.
    */
   external Type get runtimeType;
 }