Programming Ruby 1.9 The Pragmatic Programmers’ Guide

Ruby 1.9 is the latest version of Ruby. It has many compelling features, including multinationalization support, new block scoping, and better performance. At the same time, the current Ruby 1.8 is still being maintained and is widely used. We're therefore releasing both the Ruby 1.9 version of the PickAxe (this book) alongside the 1.8 version of the PickAxe. Readers can choose the book that matches their environment.