Navigate from a node to its Nth child or throw an exception if the given
index is beyond the last tree in the forest of the focused node. Unsafe
version of tryAt.
Negative indexes are handled as offsets from the final tree in the forest so
that focusing on index -1 focuses on the last tree in the forest, -2 on
the tree before that and so on.
Navigate from a node to its Nth child or throw an exception if the given index is beyond the last tree in the forest of the focused node. Unsafe version of tryAt.
Negative indexes are handled as offsets from the final tree in the forest so that focusing on index
-1focuses on the last tree in the forest,-2on the tree before that and so on.Type Param: A
The underlying type of the tree.
Param: self
The zipper that will be navigated.
Param: n
Index of child that will be the new zipper focus.
Returns
An updated zipper pointing at a new focus.