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composition Posts

"composition" Knowledge Base Posts

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Mike Prestwood
1. OO/UML: Aggregation versus Composition

Our most popular article in the history of our online community! Explains the "is a", "has a", "uses a", and "looks like" relationships (updated May 2007). "Is a" is inheritance, "looks like" is interfaces, "has a" is aggregation, and "uses a" is composition.

Posted to KB Topic: Object Orientation (OO)
16 years ago, and updated 8 years ago
(8 Comments , last by mprestwood )

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Coding & OO

Evan Egalite
2. Implementing the Composite and Visitor Patterns in Java

Implementing design patterns can be difficult and little sample code exists that walks you through the process. The purpose of this article is to walk through the implementation of a program that uses the Composite and Visitor design patterns. The sample project is written in the object-oriented language, Java, but it could just as easily have been written in C++.

Posted to KB Topic: OOP
16 years ago, and updated 9 years ago
(1 Comments , last by mprestwood )

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Java

Mike Prestwood
3. Aggregation

Aggregations indicate a whole-part relationship, and are known as "has-a" or "is part of" relationships. An Aggregation relationship is indicated by a line with a hollow diamond.

Posted to KB Topic: Object Orientation (OO)
10 years ago, and updated 9 years ago

Definition

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Coding & OO

Mike Prestwood
4. Introduction to the Unified Modeling Language This introduction to the UML covers symbol usage, definitions, and creating diagrams. The UML standardizes what diagrams with what symbols for what situation. The UML is complete with diagrams for analysis, design, and coding. Use use case diagrams to document how users (actors) use a system (a use case). Use class and object diagrams for the design and coding of a system. A class is the prototype for an object. An object has attributes (properties) and the current values of those properties is the current state of the object.
15 years ago, and updated 10 years ago

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Analysis & UML

Mike Prestwood
5. Dependency A "uses-a" relationship. For example, when a class uses another class as a member variable or a parameter. A "uses-a" relationship forms a dependency on a class. A Dependency relationship is indicated by a dotted line with an arrow.
10 years ago, and updated 10 years ago

Definition
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Analysis & UML
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"composition" Message Board Posts


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Mike Prestwood
Prestwood Staff Note - 3/30/2010
{Too Long!}
Posted to MB Topic: Chit Chat « Staff Board
11 years ago
3 replies. Last post:

mprestwood
Sounds great. After your finals, let's do that.
11 years ago
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