IT SOLUTIONS
Your full service technology partner! 
-Collapse +Expand
To/From Code
-Collapse +Expand Cross Ref Guide
-Collapse +Expand Members-Only
Sign in to see member-only pages.
   ► KBTo/From GuidesDelphi Prism  Print This     

Inheritance (Delphi Prism and PHP Cross Reference Guide)

By Mike Prestwood

Delphi Prism versus PHP: A side by side comparison between Delphi Prism and PHP.

 
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.

Delphi Prism:   =class(ParentClass)

In Prism, like Delphi, you use the class keyword followed by the parent class in parens. 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. 

Android = public class
end;
 
T-600 = public class(Android)
end;
[Not specified yet. Coming...]












Go ahead!   Use Us! Call: 916-726-5675  Or visit our new sales site: 
www.prestwood.com


©1995-2020 Prestwood IT Solutions.   [Security & Privacy]