# assert not tree.has_key(0)
# assert tree.has_key(2)
# assert not tree.has_key(6)
- redef fun has_key(key: K): Bool do
+ redef fun has_key(key) do
if is_empty then return false
var res = search_down(root.as(not null), key)
if res != null then
# assert tree[1] == "n1"
# assert tree.has_key(1)
# assert tree[2] == "n2"
- redef fun [](key: K): E do
+ redef fun [](key) do
assert not_empty: not is_empty
if cache_node != null and cache_node.key == key then return cache_node.value
var res = search_down(root.as(not null), key)
return res.value
end
- protected fun search_down(from: N, key: K): nullable N do
+ # Search `key` in `from` and its children nodes.
+ protected fun search_down(from: N, key: nullable Object): nullable N do
+ if not key isa Comparable then return null
var cmp = key <=> from.key
if cmp == 0 then return from
if from.left != null and cmp < 0 then
return min_from(root.as(not null)).value
end
+ # Get the left-most child from `node`.
protected fun min_from(node: N): N do
if node.left == null then return node
return min_from(node.left.as(not null))
return max_from(root.as(not null)).value
end
+ # Get the right-most child from `node`.
protected fun max_from(node: N): N do
if node.right == null then return node
return max_from(node.right.as(not null))
insert_node(new BinTreeNode[K, E](key, item))
end
+ # Add `node` in the tree.
protected fun insert_node(node: N) do
len += 1
if root == null then
# Perform left rotation on `node`
#
+ # ~~~raw
# N Y
# / \ > / \
# a Y N c
# / \ < / \
# b c a b
+ # ~~~
#
protected fun rotate_left(node: N) do
var y = node.right
# Perform right rotation on `node`
#
+ # ~~~raw
# N Y
# / \ > / \
# a Y N c
# / \ < / \
# b c a b
+ # ~~~
#
protected fun rotate_right(node: N) do
var y = node.left
return sorted
end
+ # Sort the tree from `node` and place results in `sorted`.
protected fun sort_down(node: N, sorted: Array[E]) do
if node.left != null then sort_down(node.left.as(not null), sorted)
sorted.add(node.value)
return "[{print_tree(root)}]"
end
+ # Print the tree starting from `node`.
protected fun print_tree(node: N): String do
var s = new FlatBuffer
s.append(node.to_s)
redef fun show_dot do
assert not_empty: root != null
- var f = new OProcess("dot", "-Txlib")
+ var f = new ProcessWriter("dot", "-Txlib")
f.write "digraph \{\n"
dot_down(root.as(not null), f)
f.write "\}\n"
f.close
end
- protected fun dot_down(node: N, f: OProcess) do
+ # Translate the tree in dot format starting from `node`.
+ protected fun dot_down(node: N, f: ProcessWriter) do
if node.left != null then dot_down(node.left.as(not null), f)
f.write node.to_dot
if node.right != null then dot_down(node.right.as(not null), f)
class BinTreeNode[K: Comparable, E]
super TreeNode[K, E]
- private var prev: nullable BinTreeNode[K, E]
- private var next: nullable BinTreeNode[K, E]
+ private var prev: nullable BinTreeNode[K, E] = null
+ private var next: nullable BinTreeNode[K, E] = null
redef type N: BinTreeNode[K, E]
- init(key: K, item: E) do
- super(key, item)
- end
-
private var left_node: nullable N = null
# `left` tree node child (null if node has no left child)
private class BinTreeMapIterator[K: Comparable, E]
super MapIterator[K, E]
- var current: nullable BinTreeNode[K, E]
+ var tree: BinTreeMap[K, E]
+ var current: nullable BinTreeNode[K, E] = null
- init(tree: BinTreeMap[K, E]) do
- current = tree.first_node
- end
+ init do current = tree.first_node
redef fun is_ok do return not current == null
redef fun next do current = current.next
nitlanguage / nit.git / blobdiff