Association (object-oriented programming)
In Object-oriented programming, Association defines a relationship between classes of objects which allows one object instance to cause another to perform an action on its behalf.
In generic terms the causation is usually called "sending a message" to the controlled object. Concrete implementation usually requires the requesting object to invoke a method or member function using a reference or pointer to the memory location of the controlled object.
See also: Aggregation, Inheritance.
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