Re: NewEra vs VB/Delphi

}From: "Billy Wheeler" <billy@west.co.za> }To: Michael Segel <mikey@segel.com>, informix-list@rmy.emory.edu }Date: Fri, 20 Jun 1997 08:03:15 +0200 }X-Informix-List-Id: <list.15110> } }On 19 Jun 97 at 16:05, Michael Segel wrote a response to comments from Billy: }> No, }> I *slag* off New Era because it is a poorly written language and }> doesn't perform as well as stated. (Hint. Each instance of a window }> is a subclass not just an instantiation of a class.) } }I'm not sure if I agree - how would you (easily) distinguish between }different types of of window, and how would you (easily) get the }constructor function to create all the window-bound objects if you }didn't subclass? I think Tom Cargill covers the distinction very elegantly in his "C++ Style" book (I'm not sure that's the title; my copy's at home, of course), in Chapter 1. A class should describe a collection of objects; the constructor parameters and methods invoked on the class should provide the specializations for a particular instance of the class. A class should not be so specialized that it describes a single object (pace the Patterns people who want to exploit the Singleton Pattern -- that's quite a bit different). Yours, Jonathan Leffler (johnl@informix.com) #include <disclaimer.h>