The iterator pattern provides a way to encapsulate looping through a collection or array of objects.

迭代器模式将提供一种通过对象集合或对象数组封装迭代的方法。

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Create an iterator to iterate through the collection.

创建一个迭代器，以便通过集合进行迭代。

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Even as objects get added to the collection, the original Iterator can proceed, working through the items in the original collection.

即使对象加入到了集合中，原来的Iterator也可以进行，继续遍历原来集合中的项。

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