Webthis is main.js var dog1 = new Dog ("a",1); var dog2 = new Dog ("b",2); dog1.howl (); dog1.howl = function () { console.log ("test"); }; dog2.howl (); dog1.howl = null; dog1.howl (); this is Dog.js the sub class WebJun 5, 2024 · // Javascript var dog = new Dog(); dog.eat(); // -> 'Rax eat' dog.sounds();// -> 'Dog barks' var cat = new Cat(); cat.eat();// -> 'Stormy eats' cat.sounds();// -> 'Cat …

Javascript面向对象编程 - 知乎

WebMay 31, 2024 · A Pure function is a function which uses only those parameters which are passed on to it and calculates the result. If the function is using any other parameter that is outside the function then the function is not pure. Example of Impure function. Imagine a function that is calculating the area of a circle and receiving radius as the parameter. Web// var dog1 = new 函数名 () // function Dog () { // } // Dog.prototype.name = '小花', // Dog.prototype.age = 5, // Dog.prototype.friends = ['小黑','大白'] // Dog.prototype.say = … famous japanese footballers

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WebMay 22, 2024 · function Dog ( ) { this. color = "灰色" } //通过将子对象的原型对象指向父对象的一个实例来完成继承 ( 拿父类实例来充当子类原型对象) Dog. prototype = new Animal (); //子对象的方法其实是定义在了父类对象的实例上。 Dog. prototype. sayColor = function ( ) { alert ( this. color ); } var dog = new Dog (); var dog1= new Dog (); console. log (dog); … WebMar 16, 2024 · 每个函数 都有一个 prototype 属性 function Dog() { } //注意：prototype是函数才会有的属性 Dog.prototype.name = '小红' var dog1 = new Dog(); var dog2 = new … WebOct 12, 2014 · Scanner sc = new Scanner(System.in); Dog currentDog = new Dog(); String name = sc.next(); currentDog.setName(name); String breed = sc.next(); … copper lamp shade ikea