Note that the result returned by the block is ignored in this situation. This object responds to all the variables defined by the block and inherits from the original object. Messages are resolved by searching from the last extension layer added backwards. A number of messages are defined for the class Object are used to create and manage classes and instances. These messages are summarized in the following tables.
Detailed information is available.
A number of messages are defined for the class Object are used to create and manage messages. These messages are summarized in the following tables. For example, the integer 3 is equal to the double 3.0 because they have the same value. The integer 3 is not identical to the double 3.0 because they are not the same object. One common mistake when working with object identity occurs when an extended object is compared to an unextended object.