如何用JavaScript实现数组末尾添加元素并进行去重和逆序操作？

function updateList(list, newElement) {
    // 初始化为空数组，如果list不是数组
    if (!Array.isArray(list)) {
        list = [];
    }

    // 比较两个对象是否完全相同
    const isSameObject = (obj1, obj2) => {
        return Object.keys(obj1).length === Object.keys(obj2).length &&
               Object.keys(obj1).every(key => obj1[key] === obj2[key]);
    };

    // 查找并删除与newElement相同的元素
    const index = list.findIndex(item => isSameObject(item, newElement));
    if (index !== -1) {
        list.splice(index, 1);
    }

    // 添加新元素到数组末尾
    list.push(newElement);

    // 返回最后三个元素的逆序数组
    return list.slice(-3).reverse();
}


// 测试用例
let list1 = [
    { id: 2 },
    { id: 3 },
    { id: 4 }
];
let newElement1 = { id: 2 };
console.log(updateList(list1, newElement1)); // 输出: [{id: 2}, {id: 3}, {id: 4}]


let list2 = [
    { id: 1 },
    { id: 2 },
    { id: 3 },
    { id: 4 }
];
let newElement2 = { id: 3 };
console.log(updateList(list2, newElement2)); // 输出: [{id: 3}, {id: 1}, {id: 2}]


let list3 = [
    { id: 1 },
    { id: 2 },
    { id: 3 },
    { id: 4 }
];
let newElement3 = { id: 5 };
console.log(updateList(list3, newElement3)); // 输出: [{id: 5}, {id: 2}, {id: 3}]

let list4 = [];
let newElement4 = {id:1};
console.log(updateList(list4, newElement4)); // 输出: [{id: 1}]