How to tell if an object is an instance of a class

• By using the is and is! operators, like this:

  if (someObject is T)
  

  From the documentation:

  The is and is! operators are handy for checking types. The result of obj is T is true if obj implements the interface specified by T. For example, obj is Object is always true.

• Using the Mirrors API (see this example):

  Expect.equals('T', someObject.simpleName)
  

Recently Object got the runtimeType getter. So now, we may not only compare type of object with another type, but actually get the class name of an object.

As in:

myObject.runtimeType.toString()

Furthermore, in the current version of Dart, you can skip the toString operation and directly compare runtimeType of object with target type:

myObject.runtimeType == int

or

myObject.runtimeType == Animal