clojure.zip — org.clojure/clojure 1.10.2-alpha3

Functional hierarchical zipper, with navigation, editing, and enumeration. See Huet

append-child clj

(append-child loc item)

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

branch? clj

(branch? loc)

Returns true if the node at loc is a branch

children clj

(children loc)

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

down clj

(down loc)

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

edit clj

(edit loc f & args)

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

end? clj

(end? loc)

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

insert-child clj

(insert-child loc item)

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

insert-left clj

(insert-left loc item)

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

insert-right clj

(insert-right loc item)

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

left clj

(left loc)

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

leftmost clj

(leftmost loc)

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

lefts clj

(lefts loc)

Returns a seq of the left siblings of this loc

make-node clj

(make-node loc node children)

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

next clj

(next loc)

Moves to the next loc in the hierarchy, depth-first. When reaching the end, returns a distinguished loc detectable via end?. If already at the end, stays there.

node clj

(node loc)

Returns the node at loc

path clj

(path loc)

Returns a seq of nodes leading to this loc

prev clj

(prev loc)

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

remove clj

(remove loc)

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

replace clj

(replace loc node)

Replaces the node at this loc, without moving

right clj

(right loc)

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

rightmost clj

(rightmost loc)

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

rights clj

(rights loc)

Returns a seq of the right siblings of this loc

root clj

(root loc)

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

seq-zip clj

(seq-zip root)

Returns a zipper for nested sequences, given a root sequence

up clj

(up loc)

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

vector-zip clj

(vector-zip root)

Returns a zipper for nested vectors, given a root vector

xml-zip clj

(xml-zip root)

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

zipper clj

(zipper branch? children make-node root)

Creates a new zipper structure.

branch? is a fn that, given a node, returns true if can have children, even if it currently doesn't.

children is a fn that, given a branch node, returns a seq of its children.

make-node is a fn that, given an existing node and a seq of children, returns a new branch node with the supplied children. root is the root node.