Updated for Ruby 2.2, this handy reference offers brief yet clear explanations of Ruby's core elements--from operators to blocks to documentation creation--and highlights the key features you may work with every day. Need to know the correct syntax for a conditional? Forgot the name of that String method? This book is organized to help you find the facts fast.
Ruby Pocket Reference, 2nd Edition is ideal for experienced programmers who are new to Ruby. Whether you've come to Ruby because of Rails, or you want to take advantage of this clean, powerful, and expressive language for other applications, this reference will help you easily pinpoint the information you need.
You'll find detailed reference material for:
Keywords, operators, comments, numbers, and symbols Variables, pre-defined global variables, and regular expressions Conditional statements, method use, classes, and exception handling Methods for the BasicObject, Object, Kernel, String, Array, and Hash classes Time formatting directives New syntax since Ruby 1.9
The essence of the language distilled into it's ultimate daily reference. You can read this from cover to cover and learn the language if you are familiar with programming.
it is awesome book ,very easy in explaining ruby , support with links and libraries needed for work i use this book to dig deep again with the ruby language .
Really disappointing. It seems like this was a very lazy update of the first edition, and no effort was made to remove outdated content (other than just marking "deprecated" or "removed" under some apis).
It had mistakes (it went out of its way to mention that ruby hashes are not ordered, something that changed a few years ago), it was inconsistent, etc.
At the end the author just plainly gave up and started just listing the verbatim output of running some ruby tools with --help.
This is a really small book which can be checked in a few weeks end-to-end so it just seems like the author and O'Reilly really dropped the ball in reviewing and editing it properly.
Wish I could get my money back... buy any other ruby book out there!