重新获取个数组，相同id的取最后一个

思路:遍历放对象里，id是键，重复的后面就把前面的覆盖了，然后再转数组

const data = [
            { id: 1, name: '张三', age: 15, },
            { id: 2, name: 'John', age: 18, },
            { id: 3, name: '李四', age: 18, },
            { id: 1, name: '张三', age: 15, },
            { id: 4, name: 'Jack', age: 18, },
            { id: 5, name: '王五', age: 10, },
            { id: 4, name: 'Jack', age: 18, },
            { id: 2, name: 'John', age: 18, },
        ];

let newObj={}

data.forEach(item => {
    newObj[item.id]=item
    
});
console.log(newObj)

var arr = []

for (let i in newObj) {
    arr.push(newObj[i])
}
console.log(arr);