马老师分布式流处理服务—Apache Kafka

1. 使用原型

function Dog(name) {  this.name = name;  this.legsNum = 4;}Dog.prototype.kind = 'dog';Dog.prototype.run = function () {  console.log("I am running with " + this.legsNum + " legs.")}Dog.prototype.say = function () {  console.log("Wang Wang, I am " + this.name);}const dog = new Dog("ming");dog.say();