mirror of
https://github.com/krahets/hello-algo.git
synced 2024-12-25 12:16:29 +08:00
Fine tune.
This commit is contained in:
parent
6e715728ee
commit
edf100ec01
3 changed files with 15 additions and 13 deletions
|
@ -7,10 +7,10 @@
|
|||
|
||||
/* 基于环形数组实现的队列 */
|
||||
class ArrayQueue {
|
||||
#queue; // 用于存储队列元素的数组
|
||||
#front = 0; // 头指针,指向队首
|
||||
#rear = 0; // 尾指针,指向队尾 + 1
|
||||
#CAPACITY = 1e5;
|
||||
#queue; // 用于存储队列元素的数组
|
||||
#front = 0; // 头指针,指向队首
|
||||
#rear = 0; // 尾指针,指向队尾 + 1
|
||||
#CAPACITY = 1e3; // 默认初始容量
|
||||
|
||||
constructor(capacity) {
|
||||
this.#queue = new Array(capacity ?? this.CAPACITY);
|
||||
|
@ -34,10 +34,8 @@ class ArrayQueue {
|
|||
|
||||
/* 入队 */
|
||||
offer(num) {
|
||||
if (this.size == this.capacity) {
|
||||
console.log("队列已满");
|
||||
return;
|
||||
}
|
||||
if (this.size == this.capacity)
|
||||
throw new Error("队列已满");
|
||||
// 尾结点后添加 num
|
||||
this.#queue[this.#rear] = num;
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
|
@ -56,14 +54,14 @@ class ArrayQueue {
|
|||
peek() {
|
||||
// 删除头结点
|
||||
if (this.empty())
|
||||
throw new Error("The queue is empty!");
|
||||
throw new Error("队列为空");
|
||||
return this.#queue[this.#front];
|
||||
}
|
||||
|
||||
/* 访问指定索引元素 */
|
||||
get(index) {
|
||||
if (index >= this.size)
|
||||
throw new Error("Index out of bounds!");
|
||||
throw new Error("索引越界");
|
||||
return this.#queue[(this.#front + index) % this.capacity];
|
||||
}
|
||||
|
||||
|
@ -80,6 +78,8 @@ class ArrayQueue {
|
|||
}
|
||||
}
|
||||
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化队列 */
|
||||
const capacity = 10;
|
||||
const queue = new ArrayQueue(capacity);
|
||||
|
|
|
@ -47,7 +47,7 @@ class LinkedListQueue {
|
|||
poll() {
|
||||
const num = this.peek();
|
||||
if (!this.#front) {
|
||||
throw new Error("No element in queue!")
|
||||
throw new Error("队列为空")
|
||||
}
|
||||
// 删除头结点
|
||||
this.#front = this.#front.next;
|
||||
|
@ -58,7 +58,7 @@ class LinkedListQueue {
|
|||
/* 访问队首元素 */
|
||||
peek() {
|
||||
if (this.size === 0)
|
||||
throw new Error("No element in queue!");
|
||||
throw new Error("队列为空");
|
||||
return this.#front.val;
|
||||
}
|
||||
|
||||
|
|
|
@ -4,6 +4,8 @@
|
|||
* Author: S-N-O-R-L-A-X (snorlax.xu@outlook.com)
|
||||
*/
|
||||
|
||||
|
||||
/* Driver Code */
|
||||
/* 初始化队列 */
|
||||
// JavaScript 没有内置的队列,可以把 Array 当作队列来使用
|
||||
// 注意:由于是数组,所以 shift() 的时间复杂度是 O(n)
|
||||
|
@ -20,7 +22,7 @@ queue.push(4);
|
|||
const peek = queue[0];
|
||||
|
||||
/* 元素出队 */
|
||||
// O(n)
|
||||
// shift() 方法的时间复杂度为 O(n)
|
||||
const poll = queue.shift();
|
||||
|
||||
/* 获取队列的长度 */
|
||||
|
|
Loading…
Reference in a new issue