在链表后面插入值

class Node {
  constructor(value) {
    this.value = value;
    this.next = null;
  }
}

class LinkedList {
  constructor() {
    this.head = null;
  }

  insert(value) {
    const newNode = new Node(value);

    if (this.head === null) {
      this.head = newNode;
    } else {
      let current = this.head;
      while (current.next !== null) {
        current = current.next;
      }
      current.next = newNode;
    }
  }
}

// 创建一个链表对象
const linkedList = new LinkedList();

// 在链表后面插入值
linkedList.insert(1);
linkedList.insert(2);
linkedList.insert(3);