javascript设计模式之构造函数模式

// 构造函数模式

function Car(name, logo) {

    // 强制使用new, "this" point to the instance

    if (!(this instanceof Car)) {

        return new Car(name, logo);

    }



    this.name = name;

    this.logo = logo;

}



// Car.prototype is the original object, that every instance pointed to.

Car.prototype.output = function () {

    return (this.name + " : " + this.logo);

}



// new Car("King", "horse");

var mycar = Car("King", "horse");  // this is equal "new Car('King', 'horse')"



console.log(mycar.output());  // King : horse





console.log(Car.prototype === mycar.__proto__);  // true

console.log(Car.prototype.constructor === Car);  // true