function Persom(name,city){
this.name = name;
this.address.city = city;
}
Persom.prototype.address = {city:‘x‘};
var p1 = new Persom(‘tony‘,‘a‘);
var p2 = new Persom(‘sam‘,‘b‘);
console.log([p1,p1.address,p1.address.city])
function Persom(name,city){
this.name = name;
this.address.city = city;
}
Persom.prototype.address = {city:‘x‘};
var p1 = new Persom(‘tony‘,‘a‘);
var p2 = new Persom(‘sam‘,‘b‘);
console.log([p1,p1.address,p1.address.city])
原文：https://www.cnblogs.com/rockyan/p/8573760.html