feat: complement array_queue doc in ts

docs/chapter_stack_and_queue/queue.md

@@ -791,6 +791,123 @@ comments: true
 
     ```typescript title="array_queue.ts"
     
+    /* 基于环形数组实现的队列 */
+    class ArrayQueue {
+        private queue: number[];     // 用于存储队列元素的数组
+        private front: number = 0;  // 头指针，指向队首
+        private rear: number = 0;   // 尾指针，指向队尾 + 1
+        private CAPACITY: number = 1e5;
+
+        constructor(capacity?: number) {
+            this.queue = new Array<number>(capacity ?? this.CAPACITY);
+        }
+
+        /* 获取队列的容量 */
+        get capacity(): number {
+            return this.queue.length;
+        }
+
+        /* 获取队列的长度 */
+        get size(): number {
+            // 由于将数组看作为环形，可能 rear < front ，因此需要取余数
+            return (this.capacity + this.rear - this.front) % this.capacity;
+        }
+
+        /* 判断队列是否为空 */
+        empty(): boolean {
+            return this.rear - this.front == 0;
+        }
+
+        /* 入队 */
+        offer(num: number): void {
+            if (this.size == this.capacity) {
+                console.log("队列已满");
+                return;
+            }
+            // 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
+            this.rear = (this.rear + 1) % this.capacity;
+        }
+
+        /* 出队 */
+        poll(): number {
+            const num = this.peek();
+            // 队头指针向后移动一位，若越过尾部则返回到数组头部
+            this.front = (this.front + 1) % this.capacity;
+            return num;
+        }
+
+        /* 访问队首元素 */
+        peek(): number {
+            // 删除头结点
+            if (this.empty())
+                throw new Error("The queue is empty!");
+            return this.queue[this.front];
+        }
+
+        /* 访问指定索引元素 */
+        get(index: number): number {
+            if (index >= this.size)
+                throw new Error("Index out of bounds!");
+            return this.queue[(this.front + index) % this.capacity];
+        }
+
+        /* 返回 Array */
+        toArray(): number[] {
+            const siz = this.size;
+            const cap = this.capacity;
+            // 仅转换有效长度范围内的列表元素
+            const arr = new Array(siz);
+            for (let i = 0, j = this.front; i < siz; i++, j++) {
+                arr[i] = this.queue[j % cap];
+            }
+            return arr;
+        }
+    }
+
+    /* 初始化队列 */
+    const capacity = 10;
+    const queue = new ArrayQueue(capacity);
+
+    /* 元素入队 */
+    queue.offer(1);
+    queue.offer(3);
+    queue.offer(2);
+    queue.offer(5);
+    queue.offer(4);
+    console.log("队列 queue = ");
+    console.log(queue.toArray());
+
+    /* 访问队首元素 */
+    const peek = queue.peek();
+    console.log("队首元素 peek = " + peek);
+
+    /* 访问指定索引元素 */
+    const num = queue.get(2);
+    console.log("队列第 3 个元素为 num = " + num);
+
+    /* 元素出队 */
+    const poll = queue.poll();
+    console.log("出队元素 poll = " + poll + "，出队后 queue = ");
+    console.log(queue.toArray());
+
+    /* 获取队列的长度 */
+    const size = queue.size;
+    console.log("队列长度 size = " + size);
+
+    /* 判断队列是否为空 */
+    const empty = queue.empty();
+    console.log("队列是否为空 = " + empty);
+
+    /* 测试环形数组 */
+    for (let i = 0; i < 10; i++) {
+        queue.offer(i);
+        queue.poll();
+        console.log("第 " + i + " 轮入队 + 出队后 queue = ");
+        console.log(queue.toArray());
+    }
+
     ```
 
 === "C"