Add the remain TypeScript code (Chapter of Array and Linkedlist)
This commit is contained in:
		
							
								
								
									
										82
									
								
								codes/typescript/chapter_array_and_linkedlist/linked_list.ts
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										82
									
								
								codes/typescript/chapter_array_and_linkedlist/linked_list.ts
									
									
									
									
									
										Normal file
									
								
							| @@ -0,0 +1,82 @@ | ||||
| /* | ||||
|  * File: linked_list.ts | ||||
|  * Created Time: 2022-12-10 | ||||
|  * Author: Justin (xiefahit@gmail.com) | ||||
|  */ | ||||
|  | ||||
| import ListNode from '../module/ListNode'; | ||||
| import { printLinkedList } from '../module/PrintUtil'; | ||||
|  | ||||
| function insert(n0: ListNode, P: ListNode): void { | ||||
|     const n1 = n0.next; | ||||
|     n0.next = P; | ||||
|     P.next = n1; | ||||
| } | ||||
|  | ||||
| function remove(n0: ListNode): void { | ||||
|     if (!n0.next) { | ||||
|         return; | ||||
|     } | ||||
|     // n0 -> P -> n1 | ||||
|     const P = n0.next; | ||||
|     const n1 = P.next; | ||||
|     n0.next = n1; | ||||
| } | ||||
|  | ||||
| function access(head: ListNode | null, index: number): ListNode | null { | ||||
|     for (let i = 0; i < index; i++) { | ||||
|         if (!head) { | ||||
|             return null; | ||||
|         } | ||||
|         head = head.next; | ||||
|     } | ||||
|     return head; | ||||
| } | ||||
|  | ||||
| function find(head: ListNode | null, target: number): number { | ||||
|     let index = 0; | ||||
|     while (head !== null) { | ||||
|         if (head.val === target) { | ||||
|             return index; | ||||
|         } | ||||
|         head = head.next; | ||||
|         index += 1; | ||||
|     } | ||||
|     return -1; | ||||
| } | ||||
|  | ||||
| /* Driver Code */ | ||||
| /* 初始化链表 */ | ||||
| // 初始化各个结点 | ||||
| const n0 = new ListNode(1); | ||||
| const n1 = new ListNode(3); | ||||
| const n2 = new ListNode(2); | ||||
| const n3 = new ListNode(5); | ||||
| const n4 = new ListNode(4); | ||||
| // 构建引用指向 | ||||
| n0.next = n1; | ||||
| n1.next = n2; | ||||
| n2.next = n3; | ||||
| n3.next = n4; | ||||
| console.log('初始化的链表为'); | ||||
| printLinkedList(n0); | ||||
|  | ||||
| /* 插入结点 */ | ||||
| insert(n0, new ListNode(0)); | ||||
| console.log('插入结点后的链表为'); | ||||
| printLinkedList(n0); | ||||
|  | ||||
| /* 删除结点 */ | ||||
| remove(n0); | ||||
| console.log('删除结点后的链表为'); | ||||
| printLinkedList(n0); | ||||
|  | ||||
| /* 访问结点 */ | ||||
| const node = access(n0, 3); | ||||
| console.log(`链表中索引 3 处的结点的值 = ${node?.val}`); | ||||
|  | ||||
| /* 查找结点 */ | ||||
| const index = find(n0, 2); | ||||
| console.log(`链表中值为 2 的结点的索引 = ${index}`); | ||||
|  | ||||
| export {}; | ||||
							
								
								
									
										60
									
								
								codes/typescript/chapter_array_and_linkedlist/list.ts
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										60
									
								
								codes/typescript/chapter_array_and_linkedlist/list.ts
									
									
									
									
									
										Normal file
									
								
							| @@ -0,0 +1,60 @@ | ||||
| /* | ||||
|  * File: list.ts | ||||
|  * Created Time: 2022-12-10 | ||||
|  * Author: Justin (xiefahit@gmail.com) | ||||
|  */ | ||||
|  | ||||
| /* 初始化列表 */ | ||||
| const list: number[] = [1, 3, 2, 5, 4]; | ||||
| console.log(`列表 list = ${list}`); | ||||
|  | ||||
| /* 访问元素 */ | ||||
| const num: number = list[1]; | ||||
| console.log(`访问索引 1 处的元素,得到 num = ${num}`); | ||||
|  | ||||
| /* 更新元素 */ | ||||
| list[1] = 0; | ||||
| console.log(`将索引 1 处的元素更新为 0 ,得到 list = ${list}`); | ||||
|  | ||||
| /* 清空列表 */ | ||||
| list.length = 0; | ||||
| console.log(`清空列表后 list = ${list}`); | ||||
|  | ||||
| /* 尾部添加元素 */ | ||||
| list.push(1); | ||||
| list.push(3); | ||||
| list.push(2); | ||||
| list.push(5); | ||||
| list.push(4); | ||||
| console.log(`添加元素后 list = ${list}`); | ||||
|  | ||||
| /* 中间插入元素 */ | ||||
| list.splice(3, 0, 6); | ||||
| console.log(`在索引 3 处插入数字 6 ,得到 list = ${list}`); | ||||
|  | ||||
| /* 删除元素 */ | ||||
| list.splice(3, 1); | ||||
| console.log(`删除索引 3 处的元素,得到 list = ${list}`); | ||||
|  | ||||
| /* 通过索引遍历列表 */ | ||||
| let count = 0; | ||||
| for (let i = 0; i < list.length; i++) { | ||||
|     count++; | ||||
| } | ||||
|  | ||||
| /* 直接遍历列表元素 */ | ||||
| count = 0; | ||||
| for (const n of list) { | ||||
|     count++; | ||||
| } | ||||
|  | ||||
| /* 拼接两个列表 */ | ||||
| const list1: number[] = [6, 8, 7, 10, 9]; | ||||
| list.push(...list1); | ||||
| console.log(`将列表 list1 拼接到 list 之后,得到 list = ${list}`); | ||||
|  | ||||
| /* 排序列表 */ | ||||
| list.sort((a, b) => a - b); | ||||
| console.log(`排序列表后 list = ${list}`); | ||||
|  | ||||
| export {}; | ||||
							
								
								
									
										147
									
								
								codes/typescript/chapter_array_and_linkedlist/my_list.ts
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										147
									
								
								codes/typescript/chapter_array_and_linkedlist/my_list.ts
									
									
									
									
									
										Normal file
									
								
							| @@ -0,0 +1,147 @@ | ||||
| /* | ||||
|  * File: my_list.ts | ||||
|  * Created Time: 2022-12-11 | ||||
|  * Author: Justin (xiefahit@gmail.com) | ||||
|  */ | ||||
|  | ||||
| // 列表类 | ||||
| class MyList { | ||||
|     private nums: Array<number>; // 数组(存储列表元素) | ||||
|     private _capacity: number = 10; // 列表容量 | ||||
|     private _size: number = 0; // 列表长度(即当前元素数量) | ||||
|     private extendRatio: number = 2; // 每次列表扩容的倍数 | ||||
|  | ||||
|     /* 构造函数 */ | ||||
|     constructor() { | ||||
|         this.nums = new Array(this._capacity); | ||||
|     } | ||||
|  | ||||
|     /* 获取列表长度(即当前元素数量)*/ | ||||
|     public size(): number { | ||||
|         return this._size; | ||||
|     } | ||||
|  | ||||
|     /* 获取列表容量 */ | ||||
|     public capacity(): number { | ||||
|         return this._capacity; | ||||
|     } | ||||
|  | ||||
|     /* 访问元素 */ | ||||
|     public get(index: number): number { | ||||
|         // 索引如果越界则抛出异常,下同 | ||||
|         if (index >= this._size) { | ||||
|             throw new Error('索引越界'); | ||||
|         } | ||||
|         return this.nums[index]; | ||||
|     } | ||||
|  | ||||
|     /* 更新元素 */ | ||||
|     public set(index: number, num: number): void { | ||||
|         if (index >= this._size) throw new Error('索引越界'); | ||||
|         this.nums[index] = num; | ||||
|     } | ||||
|  | ||||
|     /* 尾部添加元素 */ | ||||
|     public add(num: number): void { | ||||
|         // 如果长度等于容量,则需要扩容 | ||||
|         if (this._size === this._capacity) { | ||||
|             this.extendCapacity(); | ||||
|         } | ||||
|         // 将新元素添加到列表尾部 | ||||
|         this.nums[this._size] = num; | ||||
|         this._size++; | ||||
|     } | ||||
|  | ||||
|     /* 中间插入元素 */ | ||||
|     public insert(index: number, num: number): void { | ||||
|         if (index >= this._size) { | ||||
|             throw new Error('索引越界'); | ||||
|         } | ||||
|         // 元素数量超出容量时,触发扩容机制 | ||||
|         if (this._size === this._capacity) { | ||||
|             this.extendCapacity(); | ||||
|         } | ||||
|         // 将索引 index 以及之后的元素都向后移动一位 | ||||
|         for (let j = this._size - 1; j >= index; j--) { | ||||
|             this.nums[j + 1] = this.nums[j]; | ||||
|         } | ||||
|         // 更新元素数量 | ||||
|         this.nums[index] = num; | ||||
|         this._size++; | ||||
|     } | ||||
|  | ||||
|     /* 删除元素 */ | ||||
|     public remove(index: number): number { | ||||
|         if (index >= this._size) throw new Error('索引越界'); | ||||
|         let num = this.nums[index]; | ||||
|         // 将索引 index 之后的元素都向前移动一位 | ||||
|         for (let j = index; j < this._size - 1; j++) { | ||||
|             this.nums[j] = this.nums[j + 1]; | ||||
|         } | ||||
|         // 更新元素数量 | ||||
|         this._size--; | ||||
|         // 返回被删除元素 | ||||
|         return num; | ||||
|     } | ||||
|  | ||||
|     /* 列表扩容 */ | ||||
|     public extendCapacity(): void { | ||||
|         // 新建一个长度为 size 的数组,并将原数组拷贝到新数组 | ||||
|         this.nums = this.nums.concat( | ||||
|             new Array(this.capacity() * (this.extendRatio - 1)) | ||||
|         ); | ||||
|         // 更新列表容量 | ||||
|         this._capacity = this.nums.length; | ||||
|     } | ||||
|  | ||||
|     /* 将列表转换为数组 */ | ||||
|     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); | ||||
|         for (let i = 0; i < size; i++) { | ||||
|             nums[i] = this.get(i); | ||||
|         } | ||||
|         return nums; | ||||
|     } | ||||
| } | ||||
|  | ||||
| /* Driver Code */ | ||||
| /* 初始化列表 */ | ||||
| let list = new MyList(); | ||||
| /* 尾部添加元素 */ | ||||
| list.add(1); | ||||
| list.add(3); | ||||
| list.add(2); | ||||
| list.add(5); | ||||
| list.add(4); | ||||
| console.log( | ||||
|     `列表 list = ${list.toArray()} ,容量 = ${list.capacity()} ,长度 = ${list.size()}` | ||||
| ); | ||||
|  | ||||
| /* 中间插入元素 */ | ||||
| list.insert(3, 6); | ||||
| console.log(`在索引 3 处插入数字 6 ,得到 list = ${list.toArray()}`); | ||||
|  | ||||
| /* 删除元素 */ | ||||
| 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); | ||||
| console.log(`访问索引 1 处的元素,得到 num = ${num}`); | ||||
|  | ||||
| /* 更新元素 */ | ||||
| list.set(1, 0); | ||||
| console.log(`将索引 1 处的元素更新为 0 ,得到 list = ${list.toArray()}`); | ||||
|  | ||||
| /* 测试扩容机制 */ | ||||
| for (let i = 0; i < 10; i++) { | ||||
|     // 在 i = 5 时,列表长度将超出列表容量,此时触发扩容机制 | ||||
|     list.add(i); | ||||
| } | ||||
| console.log( | ||||
|     `扩容后的列表 list = ${list.toArray()} ,容量 = ${list.capacity()} ,长度 = ${list.size()}` | ||||
| ); | ||||
|  | ||||
| export {}; | ||||
		Reference in New Issue
	
	Block a user