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Jakub Vojvoda
2016-09-15 21:14:18 +02:00
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bridge/README.md
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## Bridge ## Bridge
Decouple an abstraction from its implementation so that the two can Decouple an abstraction from its implementation so that the two can vary independently.
vary independently. Bridge pattern has structural purpose and applies to objects, so it deals with the composition of objects.
### When to use ### When to use

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## Composite
Compose objects into tree structures to represent part-whole hierarchies.
Composite lets clients treat individual objects and compositions of objects uniformly.
The pattern has structural purpose and applies to objects.
### When to use
* you want to represent part-whole hierarchies of objects
* you want clients to be able to ignore the difference between compositions of objects and individual objects

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## Decorator
Attach additional responsibilities to an object dynamically. Decorators
provide a flexible alternative to subclassing for extending functionality.
The pattern has structural purpose and applies to objects.
### When to use
* to add responsibilities to individual objects dynamically and transparently, that is, without affecting other objects
* for responsibilities that can be withdrawn
* when extension by subclassing is impractical