Programming Ruby 1.9 & 2.0 [Thomas, Fowler & Hunt 2013-07-07].pdf

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Programming Ruby 1.9 & 2.0
The Pragmatic Programmers’ Guide
Dave Thomas
with Chad Fowler
Andy Hunt
The Pragmatic Bookshelf
Dallas, Texas • Raleigh, North Carolina
Many of the designations used by manufacturers and sellers to distinguish their products are claimed
as trademarks. Where those designations appear in this book, and The Pragmatic Programmers, LLC
was aware of a trademark claim, the designations have been printed in initial capital letters or in all
capitals. The Pragmatic Starter Kit, The Pragmatic Programmer, Pragmatic Programming, Pragmatic
Bookshelf, PragProg and the linking
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device are trademarks of The Pragmatic Programmers, LLC.
Every precaution was taken in the preparation of this book. However, the publisher assumes no re-
sponsibility for errors or omissions, or for damages that may result from the use of information (in-
cluding program listings) contained herein.
Our Pragmatic courses, workshops, and other products can help you and your team create better
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us at
http://pragprog.com
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The team that produced this book includes:
Janet Furlow (producer)
Juliet Benda (rights)
Ellie Callahan (support)
Copyright © 2013 The Pragmatic Programmers, LLC.
All rights reserved.
No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form, or by any means, electronic, mechanical, photocopying,
recording, or otherwise, without the prior consent of the publisher.
Printed in the United States of America.
ISBN-13: 978-1-93778-549-9
Encoded using the finest acid-free high-entropy binary digits.
Book version: P1.0—June, 2013
Contents
Foreword to the Third Edition
Preface
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ix
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Road Map
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Part I — Facets of Ruby
1.
Getting Started
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1.1
The Command Prompt
1.2
Installing Ruby
1.3
Running Ruby
1.4
Ruby Documentation: RDoc and ri
Ruby.new
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2.1
Ruby Is an Object-Oriented Language
2.2
Some Basic Ruby
2.3
Arrays and Hashes
2.4
Symbols
2.5
Control Structures
2.6
Regular Expressions
2.7
Blocks and Iterators
2.8
Reading and ’Riting
2.9
Command-Line Arguments
2.10
Onward and Upward
Classes, Objects, and Variables
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3.1
Objects and Attributes
3.2
Classes Working with Other Classes
3.3
Access Control
3.4
Variables
Containers, Blocks, and Iterators
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4.1
Arrays
4.2
Hashes
4.3
Blocks and Iterators
4.4
Containers Everywhere
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