Zippers allow that focal node to travel around the tree, getting constant-time access wherever you are (not including the traversal time to reach the node).
zippers允许关注节点沿树移动，使您可在任意位置获得常量时间访问(不包括到达节点的遍历时间)。
Zippers allow that focal node to travel around the tree, getting constant-time access wherever you are (not including the traversal time to reach the node).
zippers允许关注节点沿树移动，使您可在任意位置获得常量时间访问(不包括到达节点的遍历时间)。
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