JS操作对象数组实现增删改查实例代码

// 学生对象数组
var students = [
    {id:1, name: "张三", age: 14},
    {id:2, name: "李四", age: 15},
    {id:3, name: "王五", age: 17},
    {id:4, name: "赵六", age: 18}
];

console.log(students[1]);

var ss = students.filter((p) => {
    return p.id == 4;
});

console.log(ss);
console.log(ss[0]); // 打印第一个元素

var e = {id:5, name: "王八", age: 20};
students.push(e);

// 根据ID获取下标

var e = students.filter((p) => {
    return p.id == 4;
});

var index = students.indexOf(e);
// 根据下标删除
students.splice(index,1);
console.log(students.length);  // 剩下4个

// 可以直接根据下标修改
students[0].name='张三1';
students[0].age=20;
console.log(students[0]);