Software Construction: Design Patterns 3
Cards to learn the design patterns
Cards to learn the design patterns
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Kartei Details
Karten | 9 |
---|---|
Sprache | Deutsch |
Kategorie | Informatik |
Stufe | Universität |
Erstellt / Aktualisiert | 28.12.2019 / 10.01.2020 |
Lizenzierung | Keine Angabe |
Weblink |
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The Composite Pattern (Definition)
The Composite Pattern allows you to compose objects into tree structures to represent part-whole hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly.
Design Principles
- Identify the aspects of your application that vary and separate them from what stays the same
- Program to an interface, not to an implementation
- Favor composition over inheritance
- Classes should be open for extension, but closed for modification.
The Open-Closed Principle
Open: Feel free to extend our classes with any new behavior you like. If your needs or requirements change (and we know they will), just go ahead and make your own extensions.
Closed: We spent a lot of time getting this code correct and bug free, so we can’t let you alter the existing code. It must remain closed to modification.