h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

When I think of OOP (or OOD for the purists), I always think of inheritance, encapsulation and polymorphism as the three important principles. I feel that, at the very least, the importance of defining the interface should have had a mention, but I didn't see one.

Not the point of the article, though. Took me long enough to get my head round OOP, I wrote it aimed at someone with complete ignorance of it. Stuff like that should be in 'OOP/D 2', which I encourage everyone to have a go at writing.

Hmm. Not sure I agree, I think the fact that the interface is well-defined is v. important. However, it's your article and you have to balance the different factors.

Important yes, but as an introduction to the subject? I'll repeat it again; the whole article is an intro to the basic idea of OOP/D from the ground up. Everything has it's place, but not right at the start.