Documentation ¶
Overview ¶
References: https://en.wikipedia.org/wiki/AVL_tree
Index ¶
- func BasicComparator[T constraints.Ordered](a, b T) int8
- type Comparator
- type Iterator
- func (iterator *Iterator[K, V]) Begin()
- func (iterator *Iterator[K, V]) End()
- func (iterator *Iterator[K, V]) First() bool
- func (iterator *Iterator[K, V]) Key() (k K, ok bool)
- func (iterator *Iterator[K, V]) Last() bool
- func (iterator *Iterator[K, V]) Next() bool
- func (iterator *Iterator[K, V]) Prev() bool
- func (iterator *Iterator[K, V]) Value() (v V)
- type Node
- type Tree
- func (t *Tree[K, V]) Ceiling(key K) (floor *Node[K, V], found bool)
- func (t *Tree[K, V]) Clear()
- func (t *Tree[K, V]) Empty() bool
- func (t *Tree[K, V]) Floor(key K) (floor *Node[K, V], found bool)
- func (t *Tree[K, V]) Get(key K) (value V, found bool)
- func (tree *Tree[K, V]) Iterator() *Iterator[K, V]
- func (t *Tree[K, V]) Keys() []K
- func (t *Tree[K, V]) Left() *Node[K, V]
- func (t *Tree[K, V]) Put(key K, value V)
- func (t *Tree[K, V]) Remove(key K)
- func (t *Tree[K, V]) Right() *Node[K, V]
- func (t *Tree[K, V]) Size() int
- func (t *Tree[K, V]) String() string
- func (t *Tree[K, V]) Values() []V
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func BasicComparator ¶
func BasicComparator[T constraints.Ordered](a, b T) int8
Types ¶
type Comparator ¶
Comparator should return a number:
negative , if a < b zero , if a == b positive , if a > b
var ( IntComparator Comparator[int] = BasicComparator[int] UintComparator Comparator[uint] = BasicComparator[uint] StringComparator Comparator[string] = BasicComparator[string] )
Some of default comparators
type Iterator ¶
type Iterator[K, V any] struct { // contains filtered or unexported fields }
Iterator holding the iterator's state
func (*Iterator[K, V]) Begin ¶
func (iterator *Iterator[K, V]) Begin()
Begin resets the iterator to its initial state (one-before-first) Call Next() to fetch the first element if any.
func (*Iterator[K, V]) End ¶
func (iterator *Iterator[K, V]) End()
End moves the iterator past the last element (one-past-the-end). Call Prev() to fetch the last element if any.
func (*Iterator[K, V]) First ¶
First moves the iterator to the first element and returns true if there was a first element in the container. If First() returns true, then first element's key and value can be retrieved by Key() and Value(). Modifies the state of the iterator
func (*Iterator[K, V]) Key ¶
Key returns the current element's key. Does not modify the state of the iterator.
func (*Iterator[K, V]) Last ¶
Last moves the iterator to the last element and returns true if there was a last element in the container. If Last() returns true, then last element's key and value can be retrieved by Key() and Value(). Modifies the state of the iterator.
func (*Iterator[K, V]) Next ¶
Next moves the iterator to the next element and returns true if there was a next element in the container. If Next() returns true, then next element's key and value can be retrieved by Key() and Value(). If Next() was called for the first time, then it will point the iterator to the first element if it exists. Modifies the state of the iterator.
func (*Iterator[K, V]) Prev ¶
Prev moves the iterator to the next element and returns true if there was a previous element in the container. If Prev() returns true, then next element's key and value can be retrieved by Key() and Value(). If Prev() was called for the first time, then it will point the iterator to the first element if it exists. Modifies the state of the iterator.
type Node ¶
type Node[K, V any] struct { Key K Value V Parent *Node[K, V] // Parent node Children [2]*Node[K, V] // Children nodes // contains filtered or unexported fields }
Node is a single element within the tree
type Tree ¶
type Tree[K, V any] struct { Cmp Comparator[K] Root *Node[K, V] // Root node // contains filtered or unexported fields }
Tree holds elements of the AVL tree.
func New ¶
func New[K, V any](cmp Comparator[K]) *Tree[K, V]
New instantiates an AVL tree with the Comparator, i.e. keys are of type int.
func (*Tree[K, V]) Ceiling ¶
Ceiling finds ceiling node of the input key, return the ceiling node or nil if no ceiling is found. Second return parameter is true if ceiling was found, otherwise false.
Ceiling node is defined as the smallest node that is larger than or equal to the given node. A ceiling node may not be found, either because the tree is empty, or because all nodes in the tree is smaller than the given node.
Key should adhere to the comparator's type assertion, otherwise method panics.
func (*Tree[K, V]) Floor ¶
Floor Finds floor node of the input key, return the floor node or nil if no ceiling is found. Second return parameter is true if floor was found, otherwise false.
Floor node is defined as the largest node that is smaller than or equal to the given node. A floor node may not be found, either because the tree is empty, or because all nodes in the tree is larger than the given node.
Key should adhere to the comparator's type assertion, otherwise method panics.
func (*Tree[K, V]) Get ¶
Get searches the node in the tree by key and returns its value or nil if key is not found in tree. Second return parameter is true if key was found, otherwise false. Key should adhere to the comparator's type assertion, otherwise method panics.
func (*Tree[K, V]) Iterator ¶
Iterator returns a stateful iterator whose elements are key/value pairs.
func (*Tree[K, V]) Left ¶
Left returns the minimum element of the AVL tree or nil if the tree is empty.
func (*Tree[K, V]) Put ¶
func (t *Tree[K, V]) Put(key K, value V)
Put inserts node into the tree. Key should adhere to the comparator's type assertion, otherwise method panics.
func (*Tree[K, V]) Remove ¶
func (t *Tree[K, V]) Remove(key K)
Remove remove the node from the tree by key. Key should adhere to the comparator's type assertion, otherwise method panics.
func (*Tree[K, V]) Right ¶
Right returns the maximum element of the AVL tree or nil if the tree is empty.