对我这样的伪程序员来说，对象、实例和继承，理解还是不够。

The instanceof operator tests whether an object has in its prototype chain the prototype property of a constructor.

有说法云：看 左边 是否是 右边 的一个事例（好像是废话？ a instance of b）

function C(){} // defining a constructor
function D(){} // defining another constructor

var o = new C();
o instanceof C; // true, because: Object.getPrototypeOf(o) === C.prototype
o instanceof D; // false, because D.prototype is nowhere in o's prototype chain
o instanceof Object; // true, because:
C.prototype instanceof Object // true

C.prototype = {};
var o2 = new C();
o2 instanceof C; // true
o instanceof C; // false, because C.prototype is nowhere in o's prototype chain anymore

D.prototype = new C(); // use inheritance
var o3 = new D();
o3 instanceof D; // true
o3 instanceof C; // true

[] instanceof window.Array //true
[] instanceof window.frames[0].Array //false

Chrome 控制台

function Car(make, model, year) {
  this.make = make;
  this.model = model;
  this.year = year;
}
qingCar=new Car('chevolete','aveo','2008')
Car {make: "chevolete", model: "aveo", year: "2008"}
k=Car(1,2,3)
undefined
qingCar.price='88000'
"88000"
qingCar
Car {make: "chevolete", model: "aveo", year: "2008", price: "88000"}
a=new Car(1,2,3)
Car {make: 1, model: 2, year: 3}
b=new Car(1,2,3)
Car {make: 1, model: 2, year: 3}
a==b
false

似乎有点类，事例，（打酱油），特有属性的意思了。