From: matz@... (Yukihiro Matsumoto)
Date: 2001-05-28T00:32:48+09:00
Subject: [ruby-talk:15802] Re: Ruby Programming Practice

Hi,

In message "[ruby-talk:15742] Ruby Programming Practice"
    on 01/05/26, "John Kaurin" <jkaurin@home.com> writes:

|But in a general Ruby programming view, where one programmer
|is controlling all the files, is it good practice for a superclass to
|use a method (or instance variable) defined by a derived class?
|This does not seem to follow from the library designer view.

I think it's OK.  I even call this a template pattern.

Some feel better if you provide empty placeholder, but I don't think
it's mandatory, because Ruby does not have virtual class, and you'll
get an error at runtime anyway.

							matz.