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BST in JavaScript
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>BST</title> | |
| </head> | |
| <body> | |
| <script> | |
| function Node(data, left, right) { | |
| this.data = data; | |
| this.left = left; | |
| this.right = right; | |
| this.show = show; | |
| } | |
| function show() { | |
| return this.data; | |
| } | |
| function BST() { | |
| this.root = null; | |
| this.insert = insert; | |
| this.inOrder = inOrder; | |
| } | |
| /** | |
| * 插入节点 | |
| * @param {number|string} data | |
| */ | |
| function insert (data) { | |
| var n = new Node(data, null, null); | |
| if (this.root === null) { | |
| this.root = n; | |
| } | |
| else { | |
| var current = this.root; | |
| var parent; | |
| while(true){ | |
| parent = current; | |
| if (data < current.data) { | |
| current = current.left; | |
| if (current == null){ // 没有左节点 | |
| parent.left = n; | |
| break; | |
| } | |
| } | |
| else { | |
| current = current.right; | |
| if (current == null){ | |
| parent.right = n; | |
| break; | |
| } | |
| } | |
| } | |
| } | |
| } | |
| // 中序遍历 | |
| function inOrder(node) { | |
| if (!(node==null)){ | |
| inOrder(node.left); | |
| console.log(node.data); | |
| inOrder(node.right); | |
| } | |
| } | |
| // test | |
| var num = new BST(); | |
| num.insert(23); | |
| num.insert(45); | |
| num.insert(16); | |
| num.insert(37); | |
| num.insert(3); | |
| num.insert(99); | |
| num.insert(22); | |
| console.log('start inOrder in BST:==========='); | |
| inOrder(num.root); // 3 16 22 23 37 45 99 | |
| </script> | |
| </body> | |
| </html> |
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