Encapsulation
The idea is to form abstractions which hide certain details from the outside world, in particular details of the implementation. Serve two purposes:
- differentiation between the specification and implementation of an operation; and
- the desire to achieve modularity.
Overloading, Overwriting, and Late Binding
- Overloading: The same method, but with a different implementation, may be defined several times in a class hierarchy.
- Overwriting: If a message is sent to an object, the most specific implementation of the method should be executed; this implementation overwrites all the other possible implementations.
- Late binding: To implement overwriting, a late binding of implementations of method calls is required, which defers the decisions about which is to be executed to run time.
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The most corrupt CEOs are those of the pretzel companies. They’re always so twisted. |