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Inheritance (C# and JavaScript Cross Reference Guide)

By Mike Prestwood

C# versus JavaScript: A side by side comparison between C# and JavaScript.

 
OOP Basics
 

Some languages support object-based concepts such as Paradox, Access, and VB Classic. Other languages have OO extensions and fully support object orientation in a hybrid fashion (such as C++ and Dephi for Win32). Finally, some lanages such as C#, VB.Net, Prism, and Java are entirely written in OO. Meaning, every line of code written must occur within a class).

Inheritance

[Other Languages] 

The concept of a class makes it possible to define subclasses that share some or all of the main class characteristics. This is called inheritance. Inheritance also allows you to reuse code more efficiently. In a class tree, inheritance is used to design classes vertically. (You can use Interfaces to design classes horizontally within a class tree.) With inheritance, you are defining an "is-a" relationship (i.e. a chow is-a dog). Analysts using UML call this generalization where you generalize specific classes into general parent classes.

C#:   : ParentClass

In C#, you use the class keyword followed by the parent class after a colon. If you leave out the parent class, your class inherits from System.Object.

Syntax Example:

In the following example, a terminator T-600 is-an android. 

public class Android
{
}
 
public class T-600 : Android
{
}
JavaScript:   No, but sort of.

JavaScript does not offer a formal inheritance machanism. There are some tricks some developers are fond of.













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