https://en.wikipedia.org/wiki/Zipper_(data_structure) Zipper (data structure) - Wikipedia A zipper is a technique of representing an aggregate data structure so that it is convenient for writing programs that traverse the structure arbitrarily and update its contents, especially in purely functional programming languages. The zipper was describ en.wikipedia.org 목표 * Zipper 트리 구조 이해 * 그림 / 코드로 표현..