//对象的扩展的APPI
a={
name:"zhang",
job:"solf"
}
b={
age:15
}
let target={};
Object.assign(target,a,b);//浅复制
//console.log(target)
//查看对象的枚举性
let mess=Object.getOwnPropertyDescriptor(a,"name")
for(key in a){
// console.log(key)
}
for(item of arr){ //不能用于对象
//console.log(item)
}
console.log(Object.keys(a))//返回数组,都是下标或属性
console.log(Object.values(a))
console.log(Object.entries(a))
console.log(JSON.stringify(a))
//对象和数组的解构
let {name,job}=a
console.log(name,job)
let [a1,b1]=arr
console.log(a1,b1)