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<Data Structures- Trees, Stacks, and the Iterator Pattern ⁄ >




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In this tutorial, we will be shifting gears from recursion to implementing an Iterator for a Tree. If you haven't already done so, I would highly recommend reading up on my previous tutorial on Recursion, Stacks, and Trees, as it covers a lot of the foundation for the Iterator Pattern here. The reason for this shift is because implementing an Iterator for a Tree nicely ties together a lot of the concepts we have talked about with Stacks and Tree Models. In addition, designing an Iterator is a key part of implementing the Collection interface, and this is not necessarily the most straight-forward for Trees like it is for Lists and Sets. Also, the concepts presented in this tutorial are applicable to Tree parsing in general.



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