Zippers

append-child

Inserts the item as the rightmost child of the node at this loc, without moving

branch?

Returns true if the node at loc is a branch

children

Returns a seq of the children of node at loc, which must be a branch

down

Returns the loc of the leftmost child of the node at this loc, or nil if no children

edit

Replaces the node at this loc with the value of (f node args)

end?

Returns true if loc represents the end of a depth-first walk

insert-child

Inserts the item as the leftmost child of the node at this loc, without moving

insert-left

Inserts the item as the left sibling of the node at this loc, without moving

insert-right

Inserts the item as the right sibling of the node at this loc, without moving

left

Returns the loc of the left sibling of the node at this loc, or nil

leftmost

Returns the loc of the leftmost sibling of the node at this loc, or self

lefts

Returns a seq of the left siblings of this loc

make-node

Returns a new branch node, given an existing node and new children. The loc is only used to supply the constructor.

next

Moves to the next loc in the hierarchy, depth-first. When reaching the end, returns a distinguished loc detectable via e...

node

Returns the node at loc

path

Returns a seq of nodes leading to this loc

prev

Moves to the previous loc in the hierarchy, depth-first. If already at the root, returns nil.

remove

Removes the node at loc, returning the loc that would have preceded it in a depth-first walk.

replace

Replaces the node at this loc, without moving

right

Returns the loc of the right sibling of the node at this loc, or nil

rightmost

Returns the loc of the rightmost sibling of the node at this loc, or self

rights

Returns a seq of the right siblings of this loc

root

zips all the way up and returns the root node, reflecting any changes.

seq-zip

Returns a zipper for nested sequences, given a root sequence

up

Returns the loc of the parent of the node at this loc, or nil if at the top

vector-zip

Returns a zipper for nested vectors, given a root vector

xml-zip

Returns a zipper for xml elements (as from xml/parse), given a root element

zipper

Creates a new zipper structure. branch? is a fn that, given a node, returns true if can have children, even if it curr...