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Added anchors to frequently asked questions.

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Ilkka Seppälä 2015-03-21 15:41:33 +02:00
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@ -415,15 +415,15 @@ Behavioral patterns are concerned with algorithms and the assignment of responsi
# Frequently asked questions
**Q: What is the difference between State and Strategy patterns?**
**<a id="Q1">Q: What is the difference between State and Strategy patterns?</a>**
While the implementation is similar they solve different problems. The State pattern deals with what state an object is in - it encapsulates state-dependent behavior. The Strategy pattern deals with how an object performs a certain task - it encapsulates an algorithm.
**Q: What is the difference between Strategy and Template Method patterns?**
**<a id="Q2">Q: What is the difference between Strategy and Template Method patterns?</a>**
In Template Method the algorithm is chosen at compile time via inheritance. With Strategy pattern the algorithm is chosen at runtime via composition.
**Q: What is the difference between Proxy and Decorator patterns?**
**<a id="Q3">Q: What is the difference between Proxy and Decorator patterns?</a>**
The difference is the intent of the patterns. While Proxy controls access to the object Decorator is used to add responsibilities to the object.