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Confused of Design patterns Diagrams

 
loki loki
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Hi all

i am preparing for part1 .i am reading M cade and paul allen books.

paul allen guide there is code along with UML diagram and same pattern cade book the UML diagram is different from the previous one.

i am not talking about interface and abstract class in the diagram .bit confused about Aggregation relation ships and references.

ex: builder patter


can any body clarify the difference.

Regards#
 
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