Start to read <Pragmatic.Programmers.Programming.Ruby.2nd>

I started to study ruby a few days ago and recently was reading an openDoc of ruby named "Ruby语言入门教程v1.0" which was  wrote by zhang kaichuan.It is a very good book and from this book I know some basic knowledge about ruby.In this forum,some people recommend the book called <Pragmatic.Programmers.Programming.Ruby.2nd> to study ruby.Yesterday afternoon,I finished my work and then I downloaded this book and started to read it.Now,I am only reading the Chapter 2,but I know more knowledge about ruby than from "Ruby语言入门教程v1.0“.For example,the difference of the single quotation string and double quotation,use "%W" to initialize an array and so on.

Because the chapter 2 is only brief,I don't know the detail of all the things and I will go on studying.If there is enough time,I will write the note of this book on the blog.