From: phlip <phlip2005@...>
Date: 2008-07-14T20:35:36+09:00
Subject: Re: Why Ruby interpreter is writed in c (not in c++)?

Ron Fox wrote:

> Close but not really.  The primary purpose of OO is that it provide a
> higher level of abstraction than C does. One that can get closer to the 
> problem being solved than C does in natural use.
> 
> This >can< result in less code, but the main win is that it results in a 
> better mapping of the program to the problem, and a better understanding 
> of the program by the programmers.

You describe an "Object Based" system.

The main win of an OOP is virtual methods have language support, reducing the 
odds of a misfire when you override a method. The alternative is messy function 
pointers that might point to garbage, or NULL.

Overriding methods, in turn, allow old code to call new code, so you can easily 
change a program by adding to its lists of concrete classes, while leaving the 
abstract classes alone. The "Open Closed Principle".

This benefit makes code harder to read and understand, not easier.

-- 
   Phlip