That depends on the exact “object-oriented” feature-set you want to have. If you need stuff like overloading and/or virtual methods, you probably need to include function pointers in structures: This would let you implement a class, by “inheriting” the base class, and implementing a suitable function: This of course requires you to also implement a … Read more
What is the difference between an Instance and an Object? Is there a difference or not?
It’s not a matter of which is the best, but of when to use what. In the ‘normal’ cases a simple question is enough to find out if we need inheritance or aggregation. If The new class is more or less as the original class. Use inheritance. The new class is now a subclass of … Read more
Because interfaces specify only what the class is doing, not how it is doing it. The problem with multiple inheritance is that two classes may define different ways of doing the same thing, and the subclass can’t choose which one to pick.
37 How do you find this one?
There are actually many good reasons to consider using accessors rather than directly exposing fields of a class – beyond just the argument of encapsulation and making future changes easier. Here are the some of the reasons I am aware of: Encapsulation of behavior associated with getting or setting the property – this allows additional functionality (like validation) … Read more
Here’s a little trick I’m using lately and brings good results. I would like to share with those who have to fight often with VBA. 1.- Implement a public initiation subroutine in each of your custom classes. I call it InitiateProperties throughout all my classes. This method has to accept the arguments you would like … Read more
Here, Cat.foo() is said to hide Animal.foo(). Hiding does not work like overriding, because static methods are not polymorphic. So the following will happen: Calling static methods on instances rather than classes is a very bad practice, and should never be done. Compare this with instance methods, which are polymorphic and are thus overridden. The … Read more
$property1 // specific variable $this->property1 // specific attribute The general use on classes is without “$” otherwise you are calling a variable called $property1 that could take any value. Example:
There’s no exact counterpart to Java’s getClass() in JavaScript. Mostly that’s due to JavaScript being a prototype-based language, as opposed to Java being a class-based one. Depending on what you need getClass() for, there are several options in JavaScript: typeof instanceof obj.constructor func.prototype, proto.isPrototypeOf A few examples: Note: if you are compiling your code with Uglify it will change non-global class names. To … Read more