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* for responsibilities that can be withdrawn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