Js基本语法-01`````` /* Js j基本语法之 Object概览 */ // 定义一个 Object let

/*
Js j基本语法之  Object概览
 */


// 定义一个 Object
let me = {
    name: 'Joao',
    age: 25,
    country: 'Brazil',
    city: 'Sao Paulo',
    hobby: 'Programming',
}


// 修改值，添加值，访问值,删除
me.age = 26 // 修改值
console.log(me.hobby) //访问值
me.ooo = "ooo" //添加值
delete me.age //删除


// 获取所有的key和value
Object.keys(me) //key
Object.values(me) //value


// 遍历，
// object.hasOwnProperty(key) 判断对象中是否有这个key，返回Boolean
for (let key in me){
    console.log(me.hasOwnProperty(key))
    if (me.hasOwnProperty(key)){
        const value = me[key]
        console.log(key, me[key])
    }
}
console.log("\n","-".repeat(66),"\n")

// 遍历，in对应key，value本身，，of对应key、value的索引
// for (let key of Object.values(me)){
for (let key in Object.values(me)){
    console.log(key)
}
```
```