课程: Programming Foundations: Design Patterns
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Understanding the Iterator pattern
- [Instructor] As we've seen, we've got two menus with two different implementations. One uses an Array, and the other uses an ArrayList. That means that the class responsible for printing the menus, the cafe, needs to use two different methods of entering through the menu items. So the two menus are exposing the details of how they're implemented to the cafe, which means that the cafe is dependent on those implementations. If someone decides to change the implementation of a menu, or say, add another type of menu, or say, add another type of menu, that will require code changes to the cafe. that will require code changes to the cafe. We can reduce the dependency between the cafe We can reduce the dependency between the cafe and the menu implementations by using the iterator pattern. and the menu implementations by using the iterator pattern. Here's the definition for iterator pattern. Here's the definition for iterator…
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内容
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Encapsulating iteration1 分钟 44 秒
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Understanding the Iterator pattern2 分钟 28 秒
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Using the Iterator pattern3 分钟 36 秒
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Using built-in iterators1 分钟 19 秒
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The single responsibility principle1 分钟 20 秒
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The iterator pattern as language feature1 分钟 30 秒
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Challenge: The Iterator pattern57 秒
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Solution: The Iterator pattern36 秒
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