class Node {
constructor(key) {
this.key = key;
this.left = null;
this.right = null;
}
}
class BinaryTree{
constructor() {
this.root = null;
}
insert(key) { // 插入数据
var newNode = new Node(key);
if (this.root == null) {
this.root = newNode;
} else {
var current = this.root;
while( true) {
if (key < current.key) {
if (current.left) {
current = current.left;
} else {
current.left = newNode;
break;
}
} else if (key > current.key) {
if (current.right) {
current = current.right;
} else {
current.right = newNode;
break;
}
}
}
}
}
getMin(node) { // 获取二叉树的最小值
node = node || this.root;
while (node.left != null) {
node = node.left;
}
return node.key;
}
getMax(node) { //获取二叉树最大值
node = node || this.root;
while (node.right != null) {
node = node.right;
}
return node.key;
}
find(key) { // 查找 给定的值
var node = this.root;
while ( node != null) {
if (key < node.key) {
node = node.left;
} else if (key > node.key) {
node = node.right;
} else {
return node;
}
}
return null;
}
remove(key) { // 删除给定的值
this.root = this.removeNode(this.root, key);
}
removeNode(node, key) { // 真正删除的函数
if (node == null) {
return null;
}
if (key < node.key) {
node.left = this.removeNode(node.left, key);
return node;
} else if (key > node.key) {
node.right = this.removeNode(node.right, key);
return node;
} else {
if (node.left == null && node.right == null) {
node = null;
return node;
} else if (node.left == null) {
return node.right;
} else if (node.right == null) {
return node.left;
} else {
var minNode = this.getMin(node.right);
node.key = minNode.key;
node.count = minNode.count;
node.right = this.removeNode(node.right, minNode.key);
return node;
}
}
}
}
