[R] Which parts of the book "Programming with Data: A Guide to the S Language" are still relevant now?

[Peng Yu]

Hi,

The book "Programming with Data: A Guide to the S Language" was
published over 10 years ago. I know that to understand object oriented
programming. I should read the associated section in this book. But I
am wondering if other chapters, in particular "Chapter 3. Quick
Reference", are still relevant now if I want to learn R.

Regard,
Peng