寄生组合式继承

//寄生组合式继承
function object(o) {
    function F() {}
    F.prototype = o;
    return new F();
}

function inheritPrototype(subType, superType) {
    var prototype = object(superType.prototype);
    prototype.constructor = subType;
    subType.prototype = prototype;
}

function SuperType(name) {
    this.name = name;
    this.colors = ["red", "blue", "green"];
}

SuperType.prototype.sayName = function() {
    console.log(this.name);
};

function SubType(name, age) {
    SuperType.call(this, name);
    this.age = age;
}

inheritPrototype(SubType, SuperType);

SubType.prototype.sayAge = function() {
    console.log(this.age);
};

var instance1 = new SubType("Nicholas", 29);
instance1.colors.push("black");
console.log(instance1.colors);
instance1.sayName();
instance1.sayAge();

var instance2 = new SubType("Greg", 27);
console.log(instance2.colors);
instance2.sayName();
instance2.sayAge();