遍历对象的属性和对象的值

//方法1

let persion = {
    name:'json',
    age:18,
    adress:'ftq'
}
for( a[a.length] in persion){console.log(a)}

//

["name"]
["name", "age"]
["name", "age", "adress"]

let c = [];let d = []
let persion3 = {
    name:'json',
    age:18,
    adress:'ftq'
}
for( c in persion3){ d = persion3[c] ;console.log(c,d)}
//name json
// age 18
// adress ftq

 

//方法2

const obj = {
　　　　name:'json',
　　　　age:18
}

 console.log(Object.keys(obj)) // ["name", "age"]

console.log(Object.values(obj))//["json", 18"]

//方法3

const obj2 = {
            name:'json',
            age:18
    }
    Object.getOwnPropertyNames(obj2).forEach(function(key){
        console.log(key+ '---'+obj[key])
    })

//name---json
age---18