learnJS/tut3.html at master · robertmoga/learnJS · GitHub

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<html>

<head>
    <title>Tut 3 Derek</title>
</head>

<body>
    <h3> Tut 3 JS - OOP </h3>
    <div>

        <script language="javascript" type="text/javascript">
            //constructor
            function Animal() {
                this.name = "No Name";
                this.sound = "Grr";
                this.owner = "No Owner";
            }

            Animal.prototype.setOwner = function (newOwner) {
                if (typeof newOwner != 'undefined') {
                    this.owner = newOwner;
                }
                else {
                    document.write("Please eneter a valid owner <br/>");
                }
            }

            Animal.prototype.getOwner = function () {
                return this.owner;
            }

            Animal.prototype.setName = function(newName)
            {
                if(typeof newName != 'undefined')
                {
                    this.name = newName;
                }
                else
                {
                    document.write("Please enter a valid name <br/>");
                }
            }
            Animal.prototype.getName = function()
            {
                return this.name;
            }

            Animal.prototype.setSound = function(newSound)
            {
                if( typeof newSound != 'undefined' )
                {
                    this.sound = newSound;
                }
                else
                {
                    document.write("Please eneter a valid sound <br/>");
                }
            }
            Animal.prototype.getSound = function()
            {
                return this.sound;
            }

            var dog = new Animal();
            dog.setName("Spot");
            dog.setOwner("Paul");
            dog.setSound("Woof");

            document.write(dog.getName() + "<br/>" );
            document.write(dog.getOwner() + "<br/>" );
            document.write(dog.getSound() + "<br/>" );

            document.write("<br/> ------------ <br/>");

            function Cat()
            {
                Animal.call(this); // inherit everything from Animal
                this.mode = "Happy";

            }

            //setting the Animal as superclass of the Cat
            Cat.prototype = new Animal(); // if we are not doing this Cat
            //will be consideredto be a subclass of Animal

            Cat.prototype.constructor = Cat;

            Cat.prototype.getMode = function()
            {
                return this.mode;
            }
            Cat.prototype.setMode = function(newMode)
            {
                if(typeof newMode != 'undefined')
                {
                    this.mode = newMode;
                }
                else
                {
                    document.write("Please enter a valid mode");
                }
            }

            var sophie = new Cat();

            sophie.setName("Sophie");
            sophie.setOwner("Gabi");
            sophie.setSound("Meow");
            sophie.setMode("Cat");

            document.write(sophie.getName() + " is " + sophie.getMode() + "<br/>");
            //document.write("Huehue");
            document.write("<p>");

            document.write(sophie instanceof Cat);
            document.write("</br>");
            document.write(typeof(sophie) + " & " + typeof(Cat));

            //method overloading

            Cat.prototype.setStuff = function(newName, newSound, newOwner)
            {
                if((typeof newName != 'undifined')&&(typeof newName != 'undifined') && (typeof newName != 'undifined') )
                {
                    // we are overwriting this method
                    Cat.prototype.setStuff = function(newName, newSound, newOwner)
                    {
                        this.name=newName;
                        this.sound=newSound;
                        this.owner=newOwner;
                    } // or whatever condition here
                }else if ((typeof newName != 'undifined')||(typeof newName != 'undifined'))
                {
                    document.write("We are going on this brench");
                }
            }

            //polymorphism


        </script>
    </div>
</body>

</html>