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https://github.com/krahets/hello-algo.git
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Update JavaScript and TypeScript codes for all chapters, rename JavaScript and TypeScript import folder to modules (#402)
* Update JavaScript and TypeScript codes * Rename JavaScript and TypeScript import folder to modules
This commit is contained in:
parent
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commit
e4a98bc9c5
@ -4,8 +4,8 @@
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* Author: IsChristina (christinaxia77@foxmail.com), Justin (xiefahit@gmail.com)
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*/
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const { printLinkedList } = require("../include/PrintUtil");
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const { ListNode } = require("../include/ListNode");
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const { printLinkedList } = require("../modules/PrintUtil");
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const { ListNode } = require("../modules/ListNode");
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/* 在链表的结点 n0 之后插入结点 P */
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function insert(n0, P) {
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@ -4,9 +4,9 @@
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* Author: Justin (xiefahit@gmail.com)
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*/
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const { ListNode } = require('../include/ListNode');
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const { TreeNode } = require('../include/TreeNode');
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const { printTree } = require('../include/PrintUtil');
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const { ListNode } = require('../modules/ListNode');
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const { TreeNode } = require('../modules/TreeNode');
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const { printTree } = require('../modules/PrintUtil');
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/* 函数 */
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function constFunc() {
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@ -4,7 +4,7 @@
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* Author: Justin (xiefahit@gmail.com)
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*/
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const { Vertex } = require('../include/Vertex')
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const { Vertex } = require('../modules/Vertex')
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/* 基于邻接表实现的无向图类 */
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class GraphAdjList {
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@ -92,7 +92,7 @@ class GraphAdjMat {
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}
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}
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/* Driver Code */
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/* 初始化无向图 */
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// 请注意,edges 元素代表顶点索引,即对应 vertices 元素索引
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const vertices = [1, 3, 2, 5, 4];
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@ -4,10 +4,8 @@
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* Author: Zhuo Qinyue (1403450829@qq.com)
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*/
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const { GraphAdjList } = require('./graph_adjacency_list');
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const { Vertex } = require('../include/Vertex');
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const { Vertex } = require('../modules/Vertex');
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/* 广度优先遍历 BFS */
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// 使用邻接表来表示图,以便获取指定顶点的所有邻接顶点
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@ -36,7 +34,6 @@ function graphBFS(graph, startVet) {
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return res;
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}
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/* Driver Code */
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/* 初始化无向图 */
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const v = Vertex.valsToVets([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
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@ -4,8 +4,7 @@
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* Author: Zhuo Qinyue (1403450829@qq.com)
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*/
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const { Vertex } = require('../include/Vertex');
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const { Vertex } = require('../modules/Vertex');
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const { GraphAdjList } = require('./graph_adjacency_list');
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/* 深度优先遍历 DFS */
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@ -34,7 +33,6 @@ function graphDFS(graph, startVet) {
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return res;
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}
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/* Driver Code */
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/* 初始化无向图 */
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const v = Vertex.valsToVets([0, 1, 2, 3, 4, 5, 6]);
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@ -4,7 +4,7 @@
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* Author: what-is-me (whatisme@outlook.jp)
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*/
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const { printHeap } = require("../include/PrintUtil");
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const { printHeap } = require("../modules/PrintUtil");
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/* 最大堆类 */
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class MaxHeap {
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@ -10,7 +10,7 @@ function binarySearch(nums, target) {
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let i = 0, j = nums.length - 1;
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// 循环,当搜索区间为空时跳出(当 i > j 时为空)
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while (i <= j) {
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let m = parseInt((i + j) / 2); // 计算中点索引 m ,在 JS 中需使用 parseInt 函数取整
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const m = parseInt((i + j) / 2); // 计算中点索引 m ,在 JS 中需使用 parseInt 函数取整
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if (nums[m] < target) // 此情况说明 target 在区间 [m+1, j] 中
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i = m + 1;
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else if (nums[m] > target) // 此情况说明 target 在区间 [i, m-1] 中
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@ -28,7 +28,7 @@ function binarySearch1(nums, target) {
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let i = 0, j = nums.length;
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// 循环,当搜索区间为空时跳出(当 i = j 时为空)
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while (i < j) {
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let m = parseInt((i + j) / 2); // 计算中点索引 m ,在 JS 中需使用 parseInt 函数取整
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const m = parseInt((i + j) / 2); // 计算中点索引 m ,在 JS 中需使用 parseInt 函数取整
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if (nums[m] < target) // 此情况说明 target 在区间 [m+1, j) 中
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i = m + 1;
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else if (nums[m] > target) // 此情况说明 target 在区间 [i, m) 中
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@ -41,11 +41,11 @@ function binarySearch1(nums, target) {
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}
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/* Driver Code */
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var target = 6;
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var nums = [1, 3, 6, 8, 12, 15, 23, 67, 70, 92];
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const target = 6;
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const nums = [1, 3, 6, 8, 12, 15, 23, 67, 70, 92];
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/* 二分查找(双闭区间) */
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var index = binarySearch(nums, target);
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let index = binarySearch(nums, target);
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console.log("目标元素 6 的索引 = " + index);
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/* 二分查找(左闭右开) */
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* Author: Zhuo Qinyue (1403450829@qq.com)
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*/
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const { ListNode, arrToLinkedList } = require("../include/ListNode");
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const { arrToLinkedList } = require("../modules/ListNode");
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/* 哈希查找(数组) */
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function hashingSearchArray(map, target) {
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* Author: JoseHung (szhong@link.cuhk.edu.hk)
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*/
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const { ListNode, arrToLinkedList } = require("../include/ListNode");
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const { ListNode, arrToLinkedList } = require("../modules/ListNode");
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/* 线性查找(数组) */
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function linearSearchArray(nums, target) {
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@ -1,5 +1,5 @@
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/**
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* File: quick_sort.js
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* File: bubble_sort.js
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* Created Time: 2022-12-01
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* Author: IsChristina (christinaxia77@foxmail.com)
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*/
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@ -1,5 +1,5 @@
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/**
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* File: quick_sort.js
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* File: insertion_sort.js
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* Created Time: 2022-12-01
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* Author: IsChristina (christinaxia77@foxmail.com)
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*/
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@ -1,5 +1,5 @@
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/**
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* File: quick_sort.js
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* File: merge_sort.js
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* Created Time: 2022-12-01
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* Author: IsChristina (christinaxia77@foxmail.com)
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*/
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@ -44,6 +44,6 @@ function mergeSort(nums, left, right) {
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}
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/* Driver Code */
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const nums = [ 7, 3, 2, 6, 0, 1, 5, 4 ]
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mergeSort(nums, 0, nums.length - 1)
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console.log('归并排序完成后 nums =', nums)
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const nums = [7, 3, 2, 6, 0, 1, 5, 4];
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mergeSort(nums, 0, nums.length - 1);
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console.log('归并排序完成后 nums =', nums);
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@ -7,49 +7,48 @@
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/* 基于数组实现的栈 */
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class ArrayStack {
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stack;
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#stack;
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constructor() {
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this.stack = [];
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this.#stack = [];
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}
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/* 获取栈的长度 */
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get size() {
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return this.stack.length;
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return this.#stack.length;
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}
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/* 判断栈是否为空 */
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empty() {
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return this.stack.length === 0;
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return this.#stack.length === 0;
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}
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/* 入栈 */
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push(num) {
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this.stack.push(num);
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this.#stack.push(num);
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}
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/* 出栈 */
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pop() {
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if (this.empty())
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throw new Error("栈为空");
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return this.stack.pop();
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return this.#stack.pop();
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}
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/* 访问栈顶元素 */
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top() {
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if (this.empty())
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throw new Error("栈为空");
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return this.stack[this.stack.length - 1];
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return this.#stack[this.#stack.length - 1];
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}
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/* 返回 Array */
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toArray() {
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return this.stack;
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return this.#stack;
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}
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};
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/* Driver Code */
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/* 初始化栈 */
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const stack = new ArrayStack();
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* Author: Zhuo Qinyue (1403450829@qq.com)
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*/
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/* Driver Code */
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/* 初始化双向队列 */
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// JavaScript 没有内置的双端队列,只能把 Array 当作双端队列来使用
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const deque = [];
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@ -19,106 +19,106 @@ class ListNode {
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/* 基于双向链表实现的双向队列 */
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class LinkedListDeque {
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front; // 头结点 front
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rear; // 尾结点 rear
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len; // 双向队列的长度
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#front; // 头结点 front
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#rear; // 尾结点 rear
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#queSize; // 双向队列的长度
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constructor() {
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this.front = null;
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this.rear = null;
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this.len = 0;
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this.#front = null;
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this.#rear = null;
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this.#queSize = 0;
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}
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/* 队尾入队操作 */
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pushLast(val) {
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const node = new ListNode(val);
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// 若链表为空,则令 front, rear 都指向 node
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if (this.len === 0) {
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this.front = node;
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this.rear = node;
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if (this.#queSize === 0) {
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this.#front = node;
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this.#rear = node;
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} else {
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// 将 node 添加至链表尾部
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this.rear.next = node;
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node.prev = this.rear;
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this.rear = node; // 更新尾结点
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this.#rear.next = node;
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node.prev = this.#rear;
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this.#rear = node; // 更新尾结点
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}
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this.len++;
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this.#queSize++;
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}
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/* 队首入队操作 */
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pushFirst(val) {
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const node = new ListNode(val);
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// 若链表为空,则令 front, rear 都指向 node
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if (this.len === 0) {
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this.front = node;
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this.rear = node;
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if (this.#queSize === 0) {
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this.#front = node;
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this.#rear = node;
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} else {
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// 将 node 添加至链表头部
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this.front.prev = node;
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node.next = this.front;
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this.front = node; // 更新头结点
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this.#front.prev = node;
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node.next = this.#front;
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this.#front = node; // 更新头结点
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}
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this.len++;
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this.#queSize++;
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}
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/* 队尾出队操作 */
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pollLast() {
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if (this.len === 0) {
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if (this.#queSize === 0) {
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return null;
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}
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const value = this.rear.val; // 存储尾结点值
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const value = this.#rear.val; // 存储尾结点值
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// 删除尾结点
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let temp = this.rear.prev;
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let temp = this.#rear.prev;
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if (temp !== null) {
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temp.next = null;
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this.rear.prev = null;
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this.#rear.prev = null;
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}
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this.rear = temp; // 更新尾结点
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this.len--;
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this.#rear = temp; // 更新尾结点
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this.#queSize--;
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return value;
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}
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/* 队首出队操作 */
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pollFirst() {
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if (this.len === 0) {
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if (this.#queSize === 0) {
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return null;
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}
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const value = this.front.val; // 存储尾结点值
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const value = this.#front.val; // 存储尾结点值
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// 删除头结点
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let temp = this.front.next;
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let temp = this.#front.next;
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if (temp !== null) {
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temp.prev = null;
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this.front.next = null;
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this.#front.next = null;
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}
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this.front = temp; // 更新头结点
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this.len--;
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this.#front = temp; // 更新头结点
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this.#queSize--;
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return value;
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}
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/* 访问队尾元素 */
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peekLast() {
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return this.len === 0 ? null : this.rear.val;
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return this.#queSize === 0 ? null : this.#rear.val;
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}
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/* 访问队首元素 */
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peekFirst() {
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return this.len === 0 ? null : this.front.val;
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return this.#queSize === 0 ? null : this.#front.val;
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}
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/* 获取双向队列的长度 */
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size() {
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return this.len;
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return this.#queSize;
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}
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/* 判断双向队列是否为空 */
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isEmpty() {
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return this.len === 0;
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return this.#queSize === 0;
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}
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/* 打印双向队列 */
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print() {
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const arr = [];
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let temp = this.front;
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let temp = this.#front;
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while (temp !== null) {
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arr.push(temp.val);
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temp = temp.next;
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@ -127,6 +127,7 @@ class LinkedListDeque {
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}
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}
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/* Driver Code */
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/* 初始化双向队列 */
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const linkedListDeque = new LinkedListDeque();
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linkedListDeque.pushLast(3);
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* Author: S-N-O-R-L-A-X (snorlax.xu@outlook.com)
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*/
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const { ListNode } = require("../include/ListNode");
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const { ListNode } = require("../modules/ListNode");
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/* 基于链表实现的队列 */
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class LinkedListQueue {
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* Author: S-N-O-R-L-A-X (snorlax.xu@outlook.com)
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*/
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const { ListNode } = require("../include/ListNode");
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const { ListNode } = require("../modules/ListNode");
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/* 基于链表实现的栈 */
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class LinkedListStack {
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@ -60,7 +60,7 @@ class LinkedListStack {
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}
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}
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/* Driver Code */
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/* 初始化栈 */
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const stack = new LinkedListStack();
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@ -4,7 +4,6 @@
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* Author: S-N-O-R-L-A-X (snorlax.xu@outlook.com)
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*/
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/* Driver Code */
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/* 初始化队列 */
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// JavaScript 没有内置的队列,可以把 Array 当作队列来使用
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@ -16,16 +15,21 @@ queue.push(3);
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queue.push(2);
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queue.push(5);
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queue.push(4);
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console.log("队列 queue =", queue);
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/* 访问队首元素 */
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const peek = queue[0];
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console.log("队首元素 peek =", peek);
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/* 元素出队 */
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// 底层是数组,因此 shift() 方法的时间复杂度为 O(n)
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const poll = queue.shift();
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console.log("出队元素 poll =", poll, ",出队后 queue = ", queue);
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/* 获取队列的长度 */
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const size = queue.length;
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console.log("队列长度 size =", size);
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/* 判断队列是否为空 */
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const empty = queue.length === 0;
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const isEmpty = queue.length === 0;
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console.log("队列是否为空 = ", isEmpty);
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|
@ -4,7 +4,6 @@
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* Author: S-N-O-R-L-A-X (snorlax.xu@outlook.com)
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*/
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/* Driver Code */
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/* 初始化栈 */
|
||||
// Javascript 没有内置的栈类,可以把 Array 当作栈来使用
|
||||
@ -16,21 +15,21 @@ stack.push(3);
|
||||
stack.push(2);
|
||||
stack.push(5);
|
||||
stack.push(4);
|
||||
console.log("栈 stack =", stack)
|
||||
console.log("栈 stack =", stack);
|
||||
|
||||
/* 访问栈顶元素 */
|
||||
const peek = stack[stack.length - 1];
|
||||
console.log("栈顶元素 peek =", peek)
|
||||
console.log("栈顶元素 peek =", peek);
|
||||
|
||||
/* 元素出栈 */
|
||||
const pop = stack.pop();
|
||||
console.log("出栈元素 pop =", pop)
|
||||
console.log("出栈后 stack =", stack)
|
||||
console.log("出栈元素 pop =", pop);
|
||||
console.log("出栈后 stack =", stack);
|
||||
|
||||
/* 获取栈的长度 */
|
||||
const size = stack.length;
|
||||
console.log("栈的长度 size =", size)
|
||||
console.log("栈的长度 size =", size);
|
||||
|
||||
/* 判断是否为空 */
|
||||
const is_empty = stack.length === 0;
|
||||
console.log("栈是否为空 =", is_empty)
|
||||
const isEmpty = stack.length === 0;
|
||||
console.log("栈是否为空 =", isEmpty);
|
||||
|
@ -4,8 +4,8 @@
|
||||
* Author: what-is-me (whatisme@outlook.jp)
|
||||
*/
|
||||
|
||||
const { TreeNode } = require("../include/TreeNode");
|
||||
const { printTree } = require("../include/PrintUtil");
|
||||
const { TreeNode } = require("../modules/TreeNode");
|
||||
const { printTree } = require("../modules/PrintUtil");
|
||||
|
||||
/* AVL 树*/
|
||||
class AVLTree {
|
||||
@ -21,7 +21,7 @@ class AVLTree {
|
||||
}
|
||||
|
||||
/* 更新结点高度 */
|
||||
updateHeight(node) {
|
||||
#updateHeight(node) {
|
||||
// 结点高度等于最高子树高度 + 1
|
||||
node.height = Math.max(this.height(node.left), this.height(node.right)) + 1;
|
||||
}
|
||||
@ -35,57 +35,57 @@ class AVLTree {
|
||||
}
|
||||
|
||||
/* 右旋操作 */
|
||||
rightRotate(node) {
|
||||
#rightRotate(node) {
|
||||
const child = node.left;
|
||||
const grandChild = child.right;
|
||||
// 以 child 为原点,将 node 向右旋转
|
||||
child.right = node;
|
||||
node.left = grandChild;
|
||||
// 更新结点高度
|
||||
this.updateHeight(node);
|
||||
this.updateHeight(child);
|
||||
this.#updateHeight(node);
|
||||
this.#updateHeight(child);
|
||||
// 返回旋转后子树的根结点
|
||||
return child;
|
||||
}
|
||||
|
||||
/* 左旋操作 */
|
||||
leftRotate(node) {
|
||||
#leftRotate(node) {
|
||||
const child = node.right;
|
||||
const grandChild = child.left;
|
||||
// 以 child 为原点,将 node 向左旋转
|
||||
child.left = node;
|
||||
node.right = grandChild;
|
||||
// 更新结点高度
|
||||
this.updateHeight(node);
|
||||
this.updateHeight(child);
|
||||
this.#updateHeight(node);
|
||||
this.#updateHeight(child);
|
||||
// 返回旋转后子树的根结点
|
||||
return child;
|
||||
}
|
||||
|
||||
/* 执行旋转操作,使该子树重新恢复平衡 */
|
||||
rotate(node) {
|
||||
#rotate(node) {
|
||||
// 获取结点 node 的平衡因子
|
||||
const balanceFactor = this.balanceFactor(node);
|
||||
// 左偏树
|
||||
if (balanceFactor > 1) {
|
||||
if (this.balanceFactor(node.left) >= 0) {
|
||||
// 右旋
|
||||
return this.rightRotate(node);
|
||||
return this.#rightRotate(node);
|
||||
} else {
|
||||
// 先左旋后右旋
|
||||
node.left = this.leftRotate(node.left);
|
||||
return this.rightRotate(node);
|
||||
node.left = this.#leftRotate(node.left);
|
||||
return this.#rightRotate(node);
|
||||
}
|
||||
}
|
||||
// 右偏树
|
||||
if (balanceFactor < -1) {
|
||||
if (this.balanceFactor(node.right) <= 0) {
|
||||
// 左旋
|
||||
return this.leftRotate(node);
|
||||
return this.#leftRotate(node);
|
||||
} else {
|
||||
// 先右旋后左旋
|
||||
node.right = this.rightRotate(node.right);
|
||||
return this.leftRotate(node);
|
||||
node.right = this.#rightRotate(node.right);
|
||||
return this.#leftRotate(node);
|
||||
}
|
||||
}
|
||||
// 平衡树,无需旋转,直接返回
|
||||
@ -94,36 +94,36 @@ class AVLTree {
|
||||
|
||||
/* 插入结点 */
|
||||
insert(val) {
|
||||
this.root = this.insertHelper(this.root, val);
|
||||
this.root = this.#insertHelper(this.root, val);
|
||||
return this.root;
|
||||
}
|
||||
|
||||
/* 递归插入结点(辅助方法) */
|
||||
insertHelper(node, val) {
|
||||
#insertHelper(node, val) {
|
||||
if (node === null) return new TreeNode(val);
|
||||
/* 1. 查找插入位置,并插入结点 */
|
||||
if (val < node.val) node.left = this.insertHelper(node.left, val);
|
||||
else if (val > node.val) node.right = this.insertHelper(node.right, val);
|
||||
if (val < node.val) node.left = this.#insertHelper(node.left, val);
|
||||
else if (val > node.val) node.right = this.#insertHelper(node.right, val);
|
||||
else return node; // 重复结点不插入,直接返回
|
||||
this.updateHeight(node); // 更新结点高度
|
||||
this.#updateHeight(node); // 更新结点高度
|
||||
/* 2. 执行旋转操作,使该子树重新恢复平衡 */
|
||||
node = this.rotate(node);
|
||||
node = this.#rotate(node);
|
||||
// 返回子树的根结点
|
||||
return node;
|
||||
}
|
||||
|
||||
/* 删除结点 */
|
||||
remove(val) {
|
||||
this.root = this.removeHelper(this.root, val);
|
||||
this.root = this.#removeHelper(this.root, val);
|
||||
return this.root;
|
||||
}
|
||||
|
||||
/* 递归删除结点(辅助方法) */
|
||||
removeHelper(node, val) {
|
||||
#removeHelper(node, val) {
|
||||
if (node === null) return null;
|
||||
/* 1. 查找结点,并删除之 */
|
||||
if (val < node.val) node.left = this.removeHelper(node.left, val);
|
||||
else if (val > node.val) node.right = this.removeHelper(node.right, val);
|
||||
if (val < node.val) node.left = this.#removeHelper(node.left, val);
|
||||
else if (val > node.val) node.right = this.#removeHelper(node.right, val);
|
||||
else {
|
||||
if (node.left === null || node.right === null) {
|
||||
const child = node.left !== null ? node.left : node.right;
|
||||
@ -133,20 +133,20 @@ class AVLTree {
|
||||
else node = child;
|
||||
} else {
|
||||
// 子结点数量 = 2 ,则将中序遍历的下个结点删除,并用该结点替换当前结点
|
||||
const temp = this.getInOrderNext(node.right);
|
||||
node.right = this.removeHelper(node.right, temp.val);
|
||||
const temp = this.#getInOrderNext(node.right);
|
||||
node.right = this.#removeHelper(node.right, temp.val);
|
||||
node.val = temp.val;
|
||||
}
|
||||
}
|
||||
this.updateHeight(node); // 更新结点高度
|
||||
this.#updateHeight(node); // 更新结点高度
|
||||
/* 2. 执行旋转操作,使该子树重新恢复平衡 */
|
||||
node = this.rotate(node);
|
||||
node = this.#rotate(node);
|
||||
// 返回子树的根结点
|
||||
return node;
|
||||
}
|
||||
|
||||
/* 获取中序遍历中的下一个结点(仅适用于 root 有左子结点的情况) */
|
||||
getInOrderNext(node) {
|
||||
#getInOrderNext(node) {
|
||||
if (node === null) return node;
|
||||
// 循环访问左子结点,直到叶结点时为最小结点,跳出
|
||||
while (node.left !== null) {
|
||||
|
@ -1,14 +1,14 @@
|
||||
/**
|
||||
* File: binary_tree.js
|
||||
* File: binary_search_tree.js
|
||||
* Created Time: 2022-12-04
|
||||
* Author: IsChristina (christinaxia77@foxmail.com)
|
||||
*/
|
||||
|
||||
const Tree = require("../include/TreeNode");
|
||||
const { printTree } = require("../include/PrintUtil");
|
||||
const { TreeNode } = require("../modules/TreeNode");
|
||||
const { printTree } = require("../modules/PrintUtil");
|
||||
|
||||
/* 二叉搜索树 */
|
||||
var root;
|
||||
let root;
|
||||
|
||||
function BinarySearchTree(nums) {
|
||||
nums.sort((a, b) => { return a - b }); // 排序数组
|
||||
@ -25,7 +25,7 @@ function buildTree(nums, i, j) {
|
||||
if (i > j) return null;
|
||||
// 将数组中间结点作为根结点
|
||||
let mid = Math.floor((i + j) / 2);
|
||||
let root = new Tree.TreeNode(nums[mid]);
|
||||
let root = new TreeNode(nums[mid]);
|
||||
// 递归建立左子树和右子树
|
||||
root.left = buildTree(nums, i, mid - 1);
|
||||
root.right = buildTree(nums, mid + 1, j);
|
||||
@ -64,7 +64,7 @@ function insert(num) {
|
||||
else cur = cur.left;
|
||||
}
|
||||
// 插入结点 val
|
||||
let node = new Tree.TreeNode(num);
|
||||
let node = new TreeNode(num);
|
||||
if (pre.val < num) pre.right = node;
|
||||
else pre.left = node;
|
||||
return node;
|
||||
@ -120,7 +120,7 @@ function getInOrderNext(root) {
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化二叉搜索树 */
|
||||
var nums = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
|
||||
const nums = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
|
||||
BinarySearchTree(nums);
|
||||
console.log("\n初始化的二叉树为\n");
|
||||
printTree(getRoot());
|
||||
|
@ -4,16 +4,16 @@
|
||||
* Author: IsChristina (christinaxia77@foxmail.com)
|
||||
*/
|
||||
|
||||
const Tree = require("../include/TreeNode");
|
||||
const { printTree } = require("../include/PrintUtil");
|
||||
const { TreeNode } = require("../modules/TreeNode");
|
||||
const { printTree } = require("../modules/PrintUtil");
|
||||
|
||||
/* 初始化二叉树 */
|
||||
// 初始化结点
|
||||
let n1 = new Tree.TreeNode(1),
|
||||
n2 = new Tree.TreeNode(2),
|
||||
n3 = new Tree.TreeNode(3),
|
||||
n4 = new Tree.TreeNode(4),
|
||||
n5 = new Tree.TreeNode(5);
|
||||
let n1 = new TreeNode(1),
|
||||
n2 = new TreeNode(2),
|
||||
n3 = new TreeNode(3),
|
||||
n4 = new TreeNode(4),
|
||||
n5 = new TreeNode(5);
|
||||
// 构建引用指向(即指针)
|
||||
n1.left = n2;
|
||||
n1.right = n3;
|
||||
@ -23,7 +23,7 @@ console.log("\n初始化二叉树\n");
|
||||
printTree(n1);
|
||||
|
||||
/* 插入与删除结点 */
|
||||
let P = new Tree.TreeNode(0);
|
||||
const P = new TreeNode(0);
|
||||
// 在 n1 -> n2 中间插入结点 P
|
||||
n1.left = P;
|
||||
P.left = n2;
|
||||
|
@ -1,18 +1,18 @@
|
||||
/**
|
||||
* File: binary_tree.js
|
||||
* File: binary_tree_bfs.js
|
||||
* Created Time: 2022-12-04
|
||||
* Author: IsChristina (christinaxia77@foxmail.com)
|
||||
*/
|
||||
|
||||
const { arrToTree } = require("../include/TreeNode");
|
||||
const { printTree } = require("../include/PrintUtil");
|
||||
const { arrToTree } = require("../modules/TreeNode");
|
||||
const { printTree } = require("../modules/PrintUtil");
|
||||
|
||||
/* 层序遍历 */
|
||||
function levelOrder(root) {
|
||||
// 初始化队列,加入根结点
|
||||
let queue = [root];
|
||||
const queue = [root];
|
||||
// 初始化一个列表,用于保存遍历序列
|
||||
let list = [];
|
||||
const list = [];
|
||||
while (queue.length) {
|
||||
let node = queue.shift(); // 队列出队
|
||||
list.push(node.val); // 保存结点值
|
||||
@ -28,10 +28,10 @@ function levelOrder(root) {
|
||||
/* Driver Code */
|
||||
/* 初始化二叉树 */
|
||||
// 这里借助了一个从数组直接生成二叉树的函数
|
||||
var root = arrToTree([1, 2, 3, 4, 5, 6, 7]);
|
||||
const root = arrToTree([1, 2, 3, 4, 5, 6, 7]);
|
||||
console.log("\n初始化二叉树\n");
|
||||
printTree(root);
|
||||
|
||||
/* 层序遍历 */
|
||||
let list = levelOrder(root);
|
||||
const list = levelOrder(root);
|
||||
console.log("\n层序遍历的结点打印序列 = " + list);
|
||||
|
@ -1,14 +1,14 @@
|
||||
/**
|
||||
* File: binary_tree.js
|
||||
* File: binary_tree_dfs.js
|
||||
* Created Time: 2022-12-04
|
||||
* Author: IsChristina (christinaxia77@foxmail.com)
|
||||
*/
|
||||
|
||||
const { arrToTree } = require("../include/TreeNode");
|
||||
const { printTree } = require("../include/PrintUtil");
|
||||
const { arrToTree } = require("../modules/TreeNode");
|
||||
const { printTree } = require("../modules/PrintUtil");
|
||||
|
||||
// 初始化列表,用于存储遍历序列
|
||||
var list = [];
|
||||
const list = [];
|
||||
|
||||
/* 前序遍历 */
|
||||
function preOrder(root) {
|
||||
@ -40,7 +40,7 @@ function postOrder(root) {
|
||||
/* Driver Code */
|
||||
/* 初始化二叉树 */
|
||||
// 这里借助了一个从数组直接生成二叉树的函数
|
||||
var root = arrToTree([1, 2, 3, 4, 5, 6, 7]);
|
||||
const root = arrToTree([1, 2, 3, 4, 5, 6, 7]);
|
||||
console.log("\n初始化二叉树\n");
|
||||
printTree(root);
|
||||
|
||||
|
@ -98,5 +98,5 @@ function printHeap(arr) {
|
||||
module.exports = {
|
||||
printLinkedList,
|
||||
printTree,
|
||||
printHeap,
|
||||
printHeap
|
||||
};
|
@ -50,5 +50,5 @@ function arrToTree(arr) {
|
||||
|
||||
module.exports = {
|
||||
TreeNode,
|
||||
arrToTree,
|
||||
arrToTree
|
||||
};
|
@ -1,5 +1,5 @@
|
||||
/**
|
||||
* File: Vertex.ts
|
||||
* File: Vertex.js
|
||||
* Created Time: 2023-02-15
|
||||
* Author: Zhuo Qinyue (1403450829@qq.com)
|
||||
*/
|
@ -70,13 +70,13 @@ function find(nums: number[], target: number): number {
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化数组 */
|
||||
let arr: number[] = new Array(5).fill(0);
|
||||
const arr: number[] = new Array(5).fill(0);
|
||||
console.log('数组 arr =', arr);
|
||||
let nums: number[] = [1, 3, 2, 5, 4];
|
||||
console.log('数组 nums =', nums);
|
||||
|
||||
/* 随机访问 */
|
||||
const random_num = randomAccess(nums);
|
||||
let random_num = randomAccess(nums);
|
||||
console.log('在 nums 中获取随机元素', random_num);
|
||||
|
||||
/* 长度扩展 */
|
||||
@ -95,7 +95,7 @@ console.log('删除索引 2 处的元素,得到 nums =', nums);
|
||||
traverse(nums);
|
||||
|
||||
/* 查找元素 */
|
||||
var index: number = find(nums, 3);
|
||||
let index = find(nums, 3);
|
||||
console.log('在 nums 中查找元素 3 ,得到索引 =', index);
|
||||
|
||||
export {};
|
||||
|
@ -4,8 +4,8 @@
|
||||
* Author: Justin (xiefahit@gmail.com)
|
||||
*/
|
||||
|
||||
import { ListNode } from '../module/ListNode';
|
||||
import { printLinkedList } from '../module/PrintUtil';
|
||||
import { ListNode } from '../modules/ListNode';
|
||||
import { printLinkedList } from '../modules/PrintUtil';
|
||||
|
||||
/* 在链表的结点 n0 之后插入结点 P */
|
||||
function insert(n0: ListNode, P: ListNode): void {
|
||||
|
@ -97,7 +97,7 @@ class MyList {
|
||||
public toArray(): number[] {
|
||||
let size = this.size();
|
||||
// 仅转换有效长度范围内的列表元素
|
||||
let nums = new Array(size);
|
||||
const nums = new Array(size);
|
||||
for (let i = 0; i < size; i++) {
|
||||
nums[i] = this.get(i);
|
||||
}
|
||||
@ -107,7 +107,7 @@ class MyList {
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化列表 */
|
||||
let list = new MyList();
|
||||
const list = new MyList();
|
||||
/* 尾部添加元素 */
|
||||
list.add(1);
|
||||
list.add(3);
|
||||
@ -127,7 +127,7 @@ list.remove(3);
|
||||
console.log(`删除索引 3 处的元素,得到 list = ${list.toArray()}`);
|
||||
|
||||
/* 访问元素 */
|
||||
let num = list.get(1);
|
||||
const num = list.get(1);
|
||||
console.log(`访问索引 1 处的元素,得到 num = ${num}`);
|
||||
|
||||
/* 更新元素 */
|
||||
|
@ -4,9 +4,9 @@
|
||||
* Author: Justin (xiefahit@gmail.com)
|
||||
*/
|
||||
|
||||
import { ListNode } from '../module/ListNode';
|
||||
import { TreeNode } from '../module/TreeNode';
|
||||
import { printTree } from '../module/PrintUtil';
|
||||
import { ListNode } from '../modules/ListNode';
|
||||
import { TreeNode } from '../modules/TreeNode';
|
||||
import { printTree } from '../modules/PrintUtil';
|
||||
|
||||
/* 函数 */
|
||||
function constFunc(): number {
|
||||
@ -57,7 +57,9 @@ function linearRecur(n: number): void {
|
||||
/* 平方阶 */
|
||||
function quadratic(n: number): void {
|
||||
// 矩阵占用 O(n^2) 空间
|
||||
const numMatrix = Array(n).fill(null).map(() => Array(n).fill(null));
|
||||
const numMatrix = Array(n)
|
||||
.fill(null)
|
||||
.map(() => Array(n).fill(null));
|
||||
// 二维列表占用 O(n^2) 空间
|
||||
const numList = [];
|
||||
for (let i = 0; i < n; i++) {
|
||||
|
@ -4,7 +4,7 @@
|
||||
* Author: Justin (xiefahit@gmail.com)
|
||||
*/
|
||||
|
||||
import { Vertex } from "../module/Vertex";
|
||||
import { Vertex } from '../modules/Vertex';
|
||||
|
||||
/* 基于邻接表实现的无向图类 */
|
||||
class GraphAdjList {
|
||||
@ -30,7 +30,7 @@ class GraphAdjList {
|
||||
/* 添加边 */
|
||||
addEdge(vet1: Vertex, vet2: Vertex): void {
|
||||
if (!this.adjList.has(vet1) || !this.adjList.has(vet2) || vet1 === vet2) {
|
||||
throw new Error("Illegal Argument Exception");
|
||||
throw new Error('Illegal Argument Exception');
|
||||
}
|
||||
// 添加边 vet1 - vet2
|
||||
this.adjList.get(vet1).push(vet2);
|
||||
@ -40,7 +40,7 @@ class GraphAdjList {
|
||||
/* 删除边 */
|
||||
removeEdge(vet1: Vertex, vet2: Vertex): void {
|
||||
if (!this.adjList.has(vet1) || !this.adjList.has(vet2) || vet1 === vet2) {
|
||||
throw new Error("Illegal Argument Exception");
|
||||
throw new Error('Illegal Argument Exception');
|
||||
}
|
||||
// 删除边 vet1 - vet2
|
||||
this.adjList.get(vet1).splice(this.adjList.get(vet1).indexOf(vet2), 1);
|
||||
@ -57,7 +57,7 @@ class GraphAdjList {
|
||||
/* 删除顶点 */
|
||||
removeVertex(vet: Vertex): void {
|
||||
if (!this.adjList.has(vet)) {
|
||||
throw new Error("Illegal Argument Exception");
|
||||
throw new Error('Illegal Argument Exception');
|
||||
}
|
||||
// 在邻接表中删除顶点 vet 对应的链表
|
||||
this.adjList.delete(vet);
|
||||
@ -72,13 +72,13 @@ class GraphAdjList {
|
||||
|
||||
/* 打印邻接表 */
|
||||
print(): void {
|
||||
console.log("邻接表 =");
|
||||
console.log('邻接表 =');
|
||||
for (const [key, value] of this.adjList.entries()) {
|
||||
const tmp = [];
|
||||
for (const vertex of value) {
|
||||
tmp.push(vertex.val);
|
||||
}
|
||||
console.log(key.val + ": " + tmp.join());
|
||||
console.log(key.val + ': ' + tmp.join());
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -92,33 +92,40 @@ if (require.main === module) {
|
||||
v2 = new Vertex(2),
|
||||
v3 = new Vertex(5),
|
||||
v4 = new Vertex(4);
|
||||
const edges = [[v0, v1], [v1, v2], [v2, v3], [v0, v3], [v2, v4], [v3, v4]];
|
||||
const edges = [
|
||||
[v0, v1],
|
||||
[v1, v2],
|
||||
[v2, v3],
|
||||
[v0, v3],
|
||||
[v2, v4],
|
||||
[v3, v4]
|
||||
];
|
||||
const graph = new GraphAdjList(edges);
|
||||
console.log("\n初始化后,图为");
|
||||
console.log('\n初始化后,图为');
|
||||
graph.print();
|
||||
|
||||
/* 添加边 */
|
||||
// 顶点 1, 2 即 v0, v2
|
||||
graph.addEdge(v0, v2);
|
||||
console.log("\n添加边 1-2 后,图为");
|
||||
console.log('\n添加边 1-2 后,图为');
|
||||
graph.print();
|
||||
|
||||
/* 删除边 */
|
||||
// 顶点 1, 3 即 v0, v1
|
||||
graph.removeEdge(v0, v1);
|
||||
console.log("\n删除边 1-3 后,图为");
|
||||
console.log('\n删除边 1-3 后,图为');
|
||||
graph.print();
|
||||
|
||||
/* 添加顶点 */
|
||||
const v5 = new Vertex(6);
|
||||
graph.addVertex(v5);
|
||||
console.log("\n添加顶点 6 后,图为");
|
||||
console.log('\n添加顶点 6 后,图为');
|
||||
graph.print();
|
||||
|
||||
/* 删除顶点 */
|
||||
// 顶点 3 即 v1
|
||||
graph.removeVertex(v1);
|
||||
console.log("\n删除顶点 3 后,图为");
|
||||
console.log('\n删除顶点 3 后,图为');
|
||||
graph.print();
|
||||
}
|
||||
|
||||
|
@ -92,7 +92,7 @@ class GraphAdjMat {
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化无向图 */
|
||||
// 请注意,edges 元素代表顶点索引,即对应 vertices 元素索引
|
||||
const vertices: number[] = [1, 3, 2, 5, 4];
|
||||
|
@ -4,9 +4,8 @@
|
||||
* Author: Zhuo Qinyue (1403450829@qq.com)
|
||||
*/
|
||||
|
||||
|
||||
import { GraphAdjList } from './graph_adjacency_list'
|
||||
import { Vertex } from '../module/Vertex';
|
||||
import { GraphAdjList } from './graph_adjacency_list';
|
||||
import { Vertex } from '../modules/Vertex';
|
||||
|
||||
/* 广度优先遍历 BFS */
|
||||
// 使用邻接表来表示图,以便获取指定顶点的所有邻接顶点
|
||||
@ -20,33 +19,43 @@ function graphBFS(graph: GraphAdjList, startVet: Vertex): Vertex[] {
|
||||
const que = [startVet];
|
||||
// 以顶点 vet 为起点,循环直至访问完所有顶点
|
||||
while (que.length) {
|
||||
const vet = que.shift(); // 队首顶点出队
|
||||
res.push(vet); // 记录访问顶点
|
||||
const vet = que.shift(); // 队首顶点出队
|
||||
res.push(vet); // 记录访问顶点
|
||||
// 遍历该顶点的所有邻接顶点
|
||||
for (const adjVet of graph.adjList.get(vet) ?? []) {
|
||||
if (visited.has(adjVet)) {
|
||||
continue; // 跳过已被访问过的顶点
|
||||
continue; // 跳过已被访问过的顶点
|
||||
}
|
||||
que.push(adjVet); // 只入队未访问
|
||||
visited.add(adjVet); // 标记该顶点已被访问
|
||||
que.push(adjVet); // 只入队未访问
|
||||
visited.add(adjVet); // 标记该顶点已被访问
|
||||
}
|
||||
}
|
||||
// 返回顶点遍历序列
|
||||
return res;
|
||||
}
|
||||
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化无向图 */
|
||||
const v = Vertex.valsToVets([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
|
||||
const edges = [[v[0], v[1]], [v[0], v[3]], [v[1], v[2]], [v[1], v[4]],
|
||||
[v[2], v[5]], [v[3], v[4]], [v[3], v[6]], [v[4], v[5]],
|
||||
[v[4], v[7]], [v[5], v[8]], [v[6], v[7]], [v[7], v[8]]];
|
||||
const edges = [
|
||||
[v[0], v[1]],
|
||||
[v[0], v[3]],
|
||||
[v[1], v[2]],
|
||||
[v[1], v[4]],
|
||||
[v[2], v[5]],
|
||||
[v[3], v[4]],
|
||||
[v[3], v[6]],
|
||||
[v[4], v[5]],
|
||||
[v[4], v[7]],
|
||||
[v[5], v[8]],
|
||||
[v[6], v[7]],
|
||||
[v[7], v[8]]
|
||||
];
|
||||
const graph = new GraphAdjList(edges);
|
||||
console.log("\n初始化后,图为");
|
||||
console.log('\n初始化后,图为');
|
||||
graph.print();
|
||||
|
||||
/* 广度优先遍历 BFS */
|
||||
const res = graphBFS(graph, v[0]);
|
||||
console.log("\n广度优先遍历(BFS)顶点序列为");
|
||||
console.log('\n广度优先遍历(BFS)顶点序列为');
|
||||
console.log(Vertex.vetsToVals(res));
|
||||
|
@ -4,14 +4,13 @@
|
||||
* Author: Zhuo Qinyue (1403450829@qq.com)
|
||||
*/
|
||||
|
||||
|
||||
import { Vertex } from '../module/Vertex';
|
||||
import { Vertex } from '../modules/Vertex';
|
||||
import { GraphAdjList } from './graph_adjacency_list';
|
||||
|
||||
/* 深度优先遍历 DFS 辅助函数 */
|
||||
function dfs(graph: GraphAdjList, visited: Set<Vertex>, res: Vertex[], vet: Vertex): void {
|
||||
res.push(vet); // 记录访问顶点
|
||||
visited.add(vet); // 标记该顶点已被访问
|
||||
res.push(vet); // 记录访问顶点
|
||||
visited.add(vet); // 标记该顶点已被访问
|
||||
// 遍历该顶点的所有邻接顶点
|
||||
for (const adjVet of graph.adjList.get(vet)) {
|
||||
if (visited.has(adjVet)) {
|
||||
@ -33,17 +32,22 @@ function graphDFS(graph: GraphAdjList, startVet: Vertex): Vertex[] {
|
||||
return res;
|
||||
}
|
||||
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化无向图 */
|
||||
const v = Vertex.valsToVets([0, 1, 2, 3, 4, 5, 6]);
|
||||
const edges = [[v[0], v[1]], [v[0], v[3]], [v[1], v[2]],
|
||||
[v[2], v[5]], [v[4], v[5]], [v[5], v[6]]];
|
||||
const edges = [
|
||||
[v[0], v[1]],
|
||||
[v[0], v[3]],
|
||||
[v[1], v[2]],
|
||||
[v[2], v[5]],
|
||||
[v[4], v[5]],
|
||||
[v[5], v[6]]
|
||||
];
|
||||
const graph = new GraphAdjList(edges);
|
||||
console.log("\n初始化后,图为");
|
||||
console.log('\n初始化后,图为');
|
||||
graph.print();
|
||||
|
||||
/* 深度优先遍历 DFS */
|
||||
const res = graphDFS(graph, v[0]);
|
||||
console.log("\n深度优先遍历(DFS)顶点序列为");
|
||||
console.log('\n深度优先遍历(DFS)顶点序列为');
|
||||
console.log(Vertex.vetsToVals(res));
|
||||
|
@ -3,8 +3,8 @@
|
||||
* Created Time: 2023-02-07
|
||||
* Author: Justin (xiefahit@gmail.com)
|
||||
*/
|
||||
|
||||
import { printHeap } from "../module/PrintUtil";
|
||||
|
||||
import { printHeap } from '../modules/PrintUtil';
|
||||
|
||||
/* 最大堆类 */
|
||||
class MaxHeap {
|
||||
@ -83,7 +83,7 @@ class MaxHeap {
|
||||
/* 元素出堆 */
|
||||
public poll(): number {
|
||||
// 判空处理
|
||||
if (this.isEmpty()) throw new RangeError("Heap is empty.");
|
||||
if (this.isEmpty()) throw new RangeError('Heap is empty.');
|
||||
// 交换根结点与最右叶结点(即交换首元素与尾元素)
|
||||
this.swap(0, this.size() - 1);
|
||||
// 删除结点
|
||||
@ -98,7 +98,8 @@ class MaxHeap {
|
||||
private siftDown(i: number): void {
|
||||
while (true) {
|
||||
// 判断结点 i, l, r 中值最大的结点,记为 ma
|
||||
const l = this.left(i), r = this.right(i);
|
||||
const l = this.left(i),
|
||||
r = this.right(i);
|
||||
let ma = i;
|
||||
if (l < this.size() && this.maxHeap[l] > this.maxHeap[ma]) ma = l;
|
||||
if (r < this.size() && this.maxHeap[r] > this.maxHeap[ma]) ma = r;
|
||||
@ -117,7 +118,6 @@ class MaxHeap {
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
function testPush(maxHeap: MaxHeap, val: number): void {
|
||||
maxHeap.push(val); // 元素入堆
|
||||
console.log(`\n添加元素 ${val} 后`);
|
||||
@ -133,7 +133,7 @@ function testPoll(maxHeap: MaxHeap): void {
|
||||
/* Driver Code */
|
||||
/* 初始化大顶堆 */
|
||||
const maxHeap = new MaxHeap([9, 8, 6, 6, 7, 5, 2, 1, 4, 3, 6, 2]);
|
||||
console.log("\n输入列表并建堆后");
|
||||
console.log('\n输入列表并建堆后');
|
||||
maxHeap.print();
|
||||
|
||||
/* 获取堆顶元素 */
|
||||
|
@ -10,7 +10,7 @@ function binarySearch(nums: number[], target: number): number {
|
||||
let i = 0, j = nums.length - 1;
|
||||
// 循环,当搜索区间为空时跳出(当 i > j 时为空)
|
||||
while (i <= j) {
|
||||
const m = Math.floor(i + (j - i) / 2); // 计算中点索引 m
|
||||
const m = Math.floor((i + j) / 2); // 计算中点索引 m
|
||||
if (nums[m] < target) { // 此情况说明 target 在区间 [m+1, j] 中
|
||||
i = m + 1;
|
||||
} else if (nums[m] > target) { // 此情况说明 target 在区间 [i, m-1] 中
|
||||
@ -28,7 +28,7 @@ function binarySearch1(nums: number[], target: number): number {
|
||||
let i = 0, j = nums.length;
|
||||
// 循环,当搜索区间为空时跳出(当 i = j 时为空)
|
||||
while (i < j) {
|
||||
const m = Math.floor(i + (j - i) / 2); // 计算中点索引 m
|
||||
const m = Math.floor((i + j) / 2); // 计算中点索引 m
|
||||
if (nums[m] < target) { // 此情况说明 target 在区间 [m+1, j) 中
|
||||
i = m + 1;
|
||||
} else if (nums[m] > target) { // 此情况说明 target 在区间 [i, m) 中
|
||||
|
@ -4,25 +4,22 @@
|
||||
* Author: Zhuo Qinyue (1403450829@qq.com)
|
||||
*/
|
||||
|
||||
import { printLinkedList } from "../module/PrintUtil";
|
||||
import { ListNode, arrToLinkedList } from "../module/ListNode";
|
||||
|
||||
import { ListNode, arrToLinkedList } from '../modules/ListNode';
|
||||
|
||||
/* 哈希查找(数组) */
|
||||
function hashingSearchArray(map: Map<number, number>, target: number): number {
|
||||
// 哈希表的 key: 目标元素,value: 索引
|
||||
// 若哈希表中无此 key ,返回 -1
|
||||
return map.has(target) ? map.get(target) as number : -1;
|
||||
return map.has(target) ? (map.get(target) as number) : -1;
|
||||
}
|
||||
|
||||
/* 哈希查找(链表) */
|
||||
function hashingSearchLinkedList(map: Map<number, ListNode>, target: number): ListNode | null {
|
||||
// 哈希表的 key: 目标结点值,value: 结点对象
|
||||
// 若哈希表中无此 key ,返回 null
|
||||
return map.has(target) ? map.get(target) as ListNode : null;
|
||||
return map.has(target) ? (map.get(target) as ListNode) : null;
|
||||
}
|
||||
|
||||
|
||||
/* Driver Code */
|
||||
const target = 3;
|
||||
|
||||
@ -31,20 +28,20 @@ const nums = [1, 5, 3, 2, 4, 7, 5, 9, 10, 8];
|
||||
// 初始化哈希表
|
||||
const map = new Map();
|
||||
for (let i = 0; i < nums.length; i++) {
|
||||
map.set(nums[i], i); // key: 元素,value: 索引
|
||||
map.set(nums[i], i); // key: 元素,value: 索引
|
||||
}
|
||||
const index = hashingSearchArray(map, target);
|
||||
console.log("目标元素 3 的索引 = " + index);
|
||||
console.log('目标元素 3 的索引 = ' + index);
|
||||
|
||||
/* 哈希查找(链表) */
|
||||
let head = arrToLinkedList(nums)
|
||||
let head = arrToLinkedList(nums);
|
||||
// 初始化哈希表
|
||||
const map1 = new Map();
|
||||
while (head != null) {
|
||||
map1.set(head.val, head); // key: 结点值,value: 结点
|
||||
head = head.next;
|
||||
map1.set(head.val, head); // key: 结点值,value: 结点
|
||||
head = head.next;
|
||||
}
|
||||
const node = hashingSearchLinkedList(map1, target);
|
||||
console.log("目标结点值 3 的对应结点对象为", node);
|
||||
console.log('目标结点值 3 的对应结点对象为', node);
|
||||
|
||||
export {};
|
||||
|
@ -4,7 +4,7 @@
|
||||
* Author: Daniel (better.sunjian@gmail.com)
|
||||
*/
|
||||
|
||||
import { ListNode, arrToLinkedList } from '../module/ListNode';
|
||||
import { ListNode, arrToLinkedList } from '../modules/ListNode';
|
||||
|
||||
/* 线性查找(数组)*/
|
||||
function linearSearchArray(nums: number[], target: number): number {
|
||||
|
@ -1,5 +1,5 @@
|
||||
/**
|
||||
* File: quick_sort.ts
|
||||
* File: bubble_sort.ts
|
||||
* Created Time: 2022-12-12
|
||||
* Author: Justin (xiefahit@gmail.com)
|
||||
*/
|
||||
|
@ -1,5 +1,5 @@
|
||||
/**
|
||||
* File: quick_sort.ts
|
||||
* File: insertion_sort.ts
|
||||
* Created Time: 2022-12-12
|
||||
* Author: Justin (xiefahit@gmail.com)
|
||||
*/
|
||||
|
@ -1,5 +1,5 @@
|
||||
/**
|
||||
* File: quick_sort.ts
|
||||
* File: merge_sort.ts
|
||||
* Created Time: 2022-12-12
|
||||
* Author: Justin (xiefahit@gmail.com)
|
||||
*/
|
||||
|
@ -71,6 +71,7 @@ class ArrayQueue {
|
||||
}
|
||||
}
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化队列 */
|
||||
const capacity = 10;
|
||||
const queue = new ArrayQueue(capacity);
|
||||
|
@ -49,7 +49,6 @@ class ArrayStack {
|
||||
|
||||
|
||||
/* Driver Code */
|
||||
|
||||
/* 初始化栈 */
|
||||
const stack = new ArrayStack();
|
||||
|
||||
|
@ -4,6 +4,7 @@
|
||||
* Author: Zhuo Qinyue (1403450829@qq.com)
|
||||
*/
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化双向队列 */
|
||||
// TypeScript 没有内置的双端队列,只能把 Array 当作双端队列来使用
|
||||
const deque: number[] = [];
|
||||
|
@ -19,21 +19,21 @@ class ListNode {
|
||||
|
||||
/* 基于双向链表实现的双向队列 */
|
||||
class LinkedListDeque {
|
||||
front: ListNode; // 头结点 front
|
||||
rear: ListNode; // 尾结点 rear
|
||||
len: number; // 双向队列的长度
|
||||
private front: ListNode; // 头结点 front
|
||||
private rear: ListNode; // 尾结点 rear
|
||||
private queSize: number; // 双向队列的长度
|
||||
|
||||
constructor() {
|
||||
this.front = null;
|
||||
this.rear = null;
|
||||
this.len = 0;
|
||||
this.queSize = 0;
|
||||
}
|
||||
|
||||
/* 队尾入队操作 */
|
||||
pushLast(val: number): void {
|
||||
const node: ListNode = new ListNode(val);
|
||||
// 若链表为空,则令 front, rear 都指向 node
|
||||
if (this.len === 0) {
|
||||
if (this.queSize === 0) {
|
||||
this.front = node;
|
||||
this.rear = node;
|
||||
} else {
|
||||
@ -42,14 +42,14 @@ class LinkedListDeque {
|
||||
node.prev = this.rear;
|
||||
this.rear = node; // 更新尾结点
|
||||
}
|
||||
this.len++;
|
||||
this.queSize++;
|
||||
}
|
||||
|
||||
/* 队首入队操作 */
|
||||
pushFirst(val: number): void {
|
||||
const node: ListNode = new ListNode(val);
|
||||
// 若链表为空,则令 front, rear 都指向 node
|
||||
if (this.len === 0) {
|
||||
if (this.queSize === 0) {
|
||||
this.front = node;
|
||||
this.rear = node;
|
||||
} else {
|
||||
@ -58,12 +58,12 @@ class LinkedListDeque {
|
||||
node.next = this.front;
|
||||
this.front = node; // 更新头结点
|
||||
}
|
||||
this.len++;
|
||||
this.queSize++;
|
||||
}
|
||||
|
||||
/* 队尾出队操作 */
|
||||
pollLast(): number {
|
||||
if (this.len === 0) {
|
||||
if (this.queSize === 0) {
|
||||
return null;
|
||||
}
|
||||
const value: number = this.rear.val; // 存储尾结点值
|
||||
@ -74,13 +74,13 @@ class LinkedListDeque {
|
||||
this.rear.prev = null;
|
||||
}
|
||||
this.rear = temp; // 更新尾结点
|
||||
this.len--;
|
||||
this.queSize--;
|
||||
return value;
|
||||
}
|
||||
|
||||
/* 队首出队操作 */
|
||||
pollFirst(): number {
|
||||
if (this.len === 0) {
|
||||
if (this.queSize === 0) {
|
||||
return null;
|
||||
}
|
||||
const value: number = this.front.val; // 存储尾结点值
|
||||
@ -91,28 +91,28 @@ class LinkedListDeque {
|
||||
this.front.next = null;
|
||||
}
|
||||
this.front = temp; // 更新头结点
|
||||
this.len--;
|
||||
this.queSize--;
|
||||
return value;
|
||||
}
|
||||
|
||||
/* 访问队尾元素 */
|
||||
peekLast(): number {
|
||||
return this.len === 0 ? null : this.rear.val;
|
||||
return this.queSize === 0 ? null : this.rear.val;
|
||||
}
|
||||
|
||||
/* 访问队首元素 */
|
||||
peekFirst(): number {
|
||||
return this.len === 0 ? null : this.front.val;
|
||||
return this.queSize === 0 ? null : this.front.val;
|
||||
}
|
||||
|
||||
/* 获取双向队列的长度 */
|
||||
size(): number {
|
||||
return this.len;
|
||||
return this.queSize;
|
||||
}
|
||||
|
||||
/* 判断双向队列是否为空 */
|
||||
isEmpty(): boolean {
|
||||
return this.len === 0;
|
||||
return this.queSize === 0;
|
||||
}
|
||||
|
||||
/* 打印双向队列 */
|
||||
@ -127,6 +127,7 @@ class LinkedListDeque {
|
||||
}
|
||||
}
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化双向队列 */
|
||||
const linkedListDeque: LinkedListDeque = new LinkedListDeque();
|
||||
linkedListDeque.pushLast(3);
|
||||
|
@ -4,12 +4,12 @@
|
||||
* Author: S-N-O-R-L-A-X (snorlax.xu@outlook.com)
|
||||
*/
|
||||
|
||||
import { ListNode } from "../module/ListNode"
|
||||
import { ListNode } from '../modules/ListNode';
|
||||
|
||||
/* 基于链表实现的队列 */
|
||||
class LinkedListQueue {
|
||||
private front: ListNode | null; // 头结点 front
|
||||
private rear: ListNode | null; // 尾结点 rear
|
||||
private rear: ListNode | null; // 尾结点 rear
|
||||
private queSize: number = 0;
|
||||
|
||||
constructor() {
|
||||
@ -46,8 +46,7 @@ class LinkedListQueue {
|
||||
/* 出队 */
|
||||
poll(): number {
|
||||
const num = this.peek();
|
||||
if (!this.front)
|
||||
throw new Error("队列为空")
|
||||
if (!this.front) throw new Error('队列为空');
|
||||
// 删除头结点
|
||||
this.front = this.front.next;
|
||||
this.queSize--;
|
||||
@ -56,8 +55,7 @@ class LinkedListQueue {
|
||||
|
||||
/* 访问队首元素 */
|
||||
peek(): number {
|
||||
if (this.size === 0)
|
||||
throw new Error("队列为空");
|
||||
if (this.size === 0) throw new Error('队列为空');
|
||||
return this.front!.val;
|
||||
}
|
||||
|
||||
@ -73,7 +71,7 @@ class LinkedListQueue {
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化队列 */
|
||||
const queue = new LinkedListQueue();
|
||||
|
||||
@ -83,22 +81,22 @@ queue.push(3);
|
||||
queue.push(2);
|
||||
queue.push(5);
|
||||
queue.push(4);
|
||||
console.log("队列 queue = " + queue.toArray());
|
||||
console.log('队列 queue = ' + queue.toArray());
|
||||
|
||||
/* 访问队首元素 */
|
||||
const peek = queue.peek();
|
||||
console.log("队首元素 peek = " + peek);
|
||||
console.log('队首元素 peek = ' + peek);
|
||||
|
||||
/* 元素出队 */
|
||||
const poll = queue.poll();
|
||||
console.log("出队元素 poll = " + poll + ",出队后 queue = " + queue.toArray());
|
||||
console.log('出队元素 poll = ' + poll + ',出队后 queue = ' + queue.toArray());
|
||||
|
||||
/* 获取队列的长度 */
|
||||
const size = queue.size;
|
||||
console.log("队列长度 size = " + size);
|
||||
console.log('队列长度 size = ' + size);
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
const isEmpty = queue.isEmpty();
|
||||
console.log("队列是否为空 = " + isEmpty);
|
||||
console.log('队列是否为空 = ' + isEmpty);
|
||||
|
||||
export {};
|
||||
|
@ -4,12 +4,12 @@
|
||||
* Author: S-N-O-R-L-A-X (snorlax.xu@outlook.com)
|
||||
*/
|
||||
|
||||
import { ListNode } from "../module/ListNode"
|
||||
import { ListNode } from '../modules/ListNode';
|
||||
|
||||
/* 基于链表实现的栈 */
|
||||
class LinkedListStack {
|
||||
private stackPeek: ListNode | null; // 将头结点作为栈顶
|
||||
private stkSize: number = 0; // 栈的长度
|
||||
private stackPeek: ListNode | null; // 将头结点作为栈顶
|
||||
private stkSize: number = 0; // 栈的长度
|
||||
|
||||
constructor() {
|
||||
this.stackPeek = null;
|
||||
@ -36,8 +36,7 @@ class LinkedListStack {
|
||||
/* 出栈 */
|
||||
pop(): number {
|
||||
const num = this.peek();
|
||||
if (!this.stackPeek)
|
||||
throw new Error("栈为空");
|
||||
if (!this.stackPeek) throw new Error('栈为空');
|
||||
this.stackPeek = this.stackPeek.next;
|
||||
this.stkSize--;
|
||||
return num;
|
||||
@ -45,8 +44,7 @@ class LinkedListStack {
|
||||
|
||||
/* 访问栈顶元素 */
|
||||
peek(): number {
|
||||
if (!this.stackPeek)
|
||||
throw new Error("栈为空");
|
||||
if (!this.stackPeek) throw new Error('栈为空');
|
||||
return this.stackPeek.val;
|
||||
}
|
||||
|
||||
@ -62,7 +60,7 @@ class LinkedListStack {
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化栈 */
|
||||
const stack = new LinkedListStack();
|
||||
|
||||
@ -72,22 +70,22 @@ stack.push(3);
|
||||
stack.push(2);
|
||||
stack.push(5);
|
||||
stack.push(4);
|
||||
console.log("栈 stack = " + stack.toArray());
|
||||
console.log('栈 stack = ' + stack.toArray());
|
||||
|
||||
/* 访问栈顶元素 */
|
||||
const peek = stack.peek();
|
||||
console.log("栈顶元素 peek = " + peek);
|
||||
console.log('栈顶元素 peek = ' + peek);
|
||||
|
||||
/* 元素出栈 */
|
||||
const pop = stack.pop();
|
||||
console.log("出栈元素 pop = " + pop + ",出栈后 stack = " + stack.toArray());
|
||||
console.log('出栈元素 pop = ' + pop + ',出栈后 stack = ' + stack.toArray());
|
||||
|
||||
/* 获取栈的长度 */
|
||||
const size = stack.size;
|
||||
console.log("栈的长度 size = " + size);
|
||||
console.log('栈的长度 size = ' + size);
|
||||
|
||||
/* 判断是否为空 */
|
||||
const isEmpty = stack.isEmpty();
|
||||
console.log("栈是否为空 = " + isEmpty);
|
||||
console.log('栈是否为空 = ' + isEmpty);
|
||||
|
||||
export {};
|
||||
|
@ -4,6 +4,7 @@
|
||||
* Author: S-N-O-R-L-A-X (snorlax.xu@outlook.com)
|
||||
*/
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化队列 */
|
||||
// TypeScript 没有内置的队列,可以把 Array 当作队列来使用
|
||||
const queue: number[] = [];
|
||||
@ -14,18 +15,23 @@ queue.push(3);
|
||||
queue.push(2);
|
||||
queue.push(5);
|
||||
queue.push(4);
|
||||
console.log("队列 queue =", queue);
|
||||
|
||||
/* 访问队首元素 */
|
||||
const peek = queue[0];
|
||||
console.log("队首元素 peek =", peek);
|
||||
|
||||
/* 元素出队 */
|
||||
// 底层是数组,因此 shift() 方法的时间复杂度为 O(n)
|
||||
const poll = queue.shift();
|
||||
console.log("出队元素 poll =", poll, ",出队后 queue = ", queue);
|
||||
|
||||
/* 获取队列的长度 */
|
||||
const size = queue.length;
|
||||
console.log("队列长度 size =", size);
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
const empty = queue.length === 0;
|
||||
const isEmpty = queue.length === 0;
|
||||
console.log("队列是否为空 = ", isEmpty);
|
||||
|
||||
export {};
|
||||
|
@ -4,6 +4,7 @@
|
||||
* Author: S-N-O-R-L-A-X (snorlax.xu@outlook.com)
|
||||
*/
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化栈 */
|
||||
// Typescript 没有内置的栈类,可以把 Array 当作栈来使用
|
||||
const stack: number[] = [];
|
||||
@ -14,17 +15,23 @@ stack.push(3);
|
||||
stack.push(2);
|
||||
stack.push(5);
|
||||
stack.push(4);
|
||||
console.log("栈 stack =", stack);
|
||||
|
||||
/* 访问栈顶元素 */
|
||||
const peek = stack[stack.length - 1];
|
||||
console.log("栈顶元素 peek =", peek);
|
||||
|
||||
/* 元素出栈 */
|
||||
const pop = stack.pop();
|
||||
console.log("出栈元素 pop =", pop);
|
||||
console.log("出栈后 stack =", stack);
|
||||
|
||||
/* 获取栈的长度 */
|
||||
const size = stack.length;
|
||||
console.log("栈的长度 size =", size);
|
||||
|
||||
/* 判断是否为空 */
|
||||
const is_empty = stack.length === 0;
|
||||
const isEmpty = stack.length === 0;
|
||||
console.log("栈是否为空 =", isEmpty);
|
||||
|
||||
export {};
|
||||
|
@ -4,8 +4,8 @@
|
||||
* Author: Justin (xiefahit@gmail.com)
|
||||
*/
|
||||
|
||||
import { TreeNode } from "../module/TreeNode";
|
||||
import { printTree } from "../module/PrintUtil";
|
||||
import { TreeNode } from '../modules/TreeNode';
|
||||
import { printTree } from '../modules/PrintUtil';
|
||||
|
||||
/* AVL 树*/
|
||||
class AVLTree {
|
||||
@ -22,7 +22,7 @@ class AVLTree {
|
||||
}
|
||||
|
||||
/* 更新结点高度 */
|
||||
updateHeight(node: TreeNode): void {
|
||||
private updateHeight(node: TreeNode): void {
|
||||
// 结点高度等于最高子树高度 + 1
|
||||
node.height = Math.max(this.height(node.left), this.height(node.right)) + 1;
|
||||
}
|
||||
@ -36,7 +36,7 @@ class AVLTree {
|
||||
}
|
||||
|
||||
/* 右旋操作 */
|
||||
rightRotate(node: TreeNode): TreeNode {
|
||||
private rightRotate(node: TreeNode): TreeNode {
|
||||
const child = node.left;
|
||||
const grandChild = child.right;
|
||||
// 以 child 为原点,将 node 向右旋转
|
||||
@ -50,7 +50,7 @@ class AVLTree {
|
||||
}
|
||||
|
||||
/* 左旋操作 */
|
||||
leftRotate(node: TreeNode): TreeNode {
|
||||
private leftRotate(node: TreeNode): TreeNode {
|
||||
const child = node.right;
|
||||
const grandChild = child.left;
|
||||
// 以 child 为原点,将 node 向左旋转
|
||||
@ -64,7 +64,7 @@ class AVLTree {
|
||||
}
|
||||
|
||||
/* 执行旋转操作,使该子树重新恢复平衡 */
|
||||
rotate(node: TreeNode): TreeNode {
|
||||
private rotate(node: TreeNode): TreeNode {
|
||||
// 获取结点 node 的平衡因子
|
||||
const balanceFactor = this.balanceFactor(node);
|
||||
// 左偏树
|
||||
@ -100,7 +100,7 @@ class AVLTree {
|
||||
}
|
||||
|
||||
/* 递归插入结点(辅助方法) */
|
||||
insertHelper(node: TreeNode, val: number): TreeNode {
|
||||
private insertHelper(node: TreeNode, val: number): TreeNode {
|
||||
if (node === null) return new TreeNode(val);
|
||||
/* 1. 查找插入位置,并插入结点 */
|
||||
if (val < node.val) {
|
||||
@ -124,7 +124,7 @@ class AVLTree {
|
||||
}
|
||||
|
||||
/* 递归删除结点(辅助方法) */
|
||||
removeHelper(node: TreeNode, val: number): TreeNode {
|
||||
private removeHelper(node: TreeNode, val: number): TreeNode {
|
||||
if (node === null) return null;
|
||||
/* 1. 查找结点,并删除之 */
|
||||
if (val < node.val) {
|
||||
@ -139,7 +139,7 @@ class AVLTree {
|
||||
return null;
|
||||
} else {
|
||||
// 子结点数量 = 1 ,直接删除 node
|
||||
node = child;
|
||||
node = child;
|
||||
}
|
||||
} else {
|
||||
// 子结点数量 = 2 ,则将中序遍历的下个结点删除,并用该结点替换当前结点
|
||||
@ -156,7 +156,7 @@ class AVLTree {
|
||||
}
|
||||
|
||||
/* 获取中序遍历中的下一个结点(仅适用于 root 有左子结点的情况) */
|
||||
getInOrderNext(node: TreeNode): TreeNode {
|
||||
private getInOrderNext(node: TreeNode): TreeNode {
|
||||
if (node === null) return node;
|
||||
// 循环访问左子结点,直到叶结点时为最小结点,跳出
|
||||
while (node.left !== null) {
|
||||
@ -188,13 +188,13 @@ class AVLTree {
|
||||
|
||||
function testInsert(tree: AVLTree, val: number): void {
|
||||
tree.insert(val);
|
||||
console.log("\n插入结点 " + val + " 后,AVL 树为");
|
||||
console.log('\n插入结点 ' + val + ' 后,AVL 树为');
|
||||
printTree(tree.root);
|
||||
}
|
||||
|
||||
function testRemove(tree: AVLTree, val: number): void {
|
||||
tree.remove(val);
|
||||
console.log("\n删除结点 " + val + " 后,AVL 树为");
|
||||
console.log('\n删除结点 ' + val + ' 后,AVL 树为');
|
||||
printTree(tree.root);
|
||||
}
|
||||
|
||||
@ -225,4 +225,4 @@ testRemove(avlTree, 4); // 删除度为 2 的结点
|
||||
|
||||
/* 查询结点 */
|
||||
const node = avlTree.search(7);
|
||||
console.log("\n查找到的结点对象为", node, ",结点值 = " + node.val);
|
||||
console.log('\n查找到的结点对象为', node, ',结点值 = ' + node.val);
|
||||
|
@ -4,8 +4,8 @@
|
||||
* Author: Justin (xiefahit@gmail.com)
|
||||
*/
|
||||
|
||||
import { TreeNode } from '../module/TreeNode';
|
||||
import { printTree } from '../module/PrintUtil';
|
||||
import { TreeNode } from '../modules/TreeNode';
|
||||
import { printTree } from '../modules/PrintUtil';
|
||||
|
||||
/* 二叉搜索树 */
|
||||
let root: TreeNode | null;
|
||||
|
@ -4,8 +4,8 @@
|
||||
* Author: Justin (xiefahit@gmail.com)
|
||||
*/
|
||||
|
||||
import { TreeNode } from '../module/TreeNode';
|
||||
import { printTree } from '../module/PrintUtil';
|
||||
import { TreeNode } from '../modules/TreeNode';
|
||||
import { printTree } from '../modules/PrintUtil';
|
||||
|
||||
/* 初始化二叉树 */
|
||||
// 初始化结点
|
||||
|
@ -4,9 +4,9 @@
|
||||
* Author: Justin (xiefahit@gmail.com)
|
||||
*/
|
||||
|
||||
import { type TreeNode } from '../module/TreeNode';
|
||||
import { arrToTree } from '../module/TreeNode';
|
||||
import { printTree } from '../module/PrintUtil';
|
||||
import { type TreeNode } from '../modules/TreeNode';
|
||||
import { arrToTree } from '../modules/TreeNode';
|
||||
import { printTree } from '../modules/PrintUtil';
|
||||
|
||||
/* 层序遍历 */
|
||||
function levelOrder(root: TreeNode | null): number[] {
|
||||
@ -30,7 +30,7 @@ function levelOrder(root: TreeNode | null): number[] {
|
||||
/* Driver Code */
|
||||
/* 初始化二叉树 */
|
||||
// 这里借助了一个从数组直接生成二叉树的函数
|
||||
var root = arrToTree([1, 2, 3, 4, 5, 6, 7]);
|
||||
const root = arrToTree([1, 2, 3, 4, 5, 6, 7]);
|
||||
console.log('\n初始化二叉树\n');
|
||||
printTree(root);
|
||||
|
||||
|
@ -4,9 +4,9 @@
|
||||
* Author: Justin (xiefahit@gmail.com)
|
||||
*/
|
||||
|
||||
import { type TreeNode } from '../module/TreeNode';
|
||||
import { arrToTree } from '../module/TreeNode';
|
||||
import { printTree } from '../module/PrintUtil';
|
||||
import { type TreeNode } from '../modules/TreeNode';
|
||||
import { arrToTree } from '../modules/TreeNode';
|
||||
import { printTree } from '../modules/PrintUtil';
|
||||
|
||||
// 初始化列表,用于存储遍历序列
|
||||
const list: number[] = [];
|
||||
|
@ -49,4 +49,7 @@ function arrToTree(arr: (number | null)[]): TreeNode | null {
|
||||
return root;
|
||||
}
|
||||
|
||||
export { TreeNode, arrToTree };
|
||||
export {
|
||||
TreeNode,
|
||||
arrToTree
|
||||
};
|
@ -31,4 +31,6 @@ class Vertex {
|
||||
}
|
||||
}
|
||||
|
||||
export { Vertex };
|
||||
export {
|
||||
Vertex
|
||||
};
|
Loading…
Reference in New Issue
Block a user