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Ruby is a free and powerful programming language that can be used to develop programs to meet nearly any programming challenge, including scripting, application programming and Web development. This new text teaches Ruby programming through a lively hands-on approach and a focus on game development. Students begin by learning the fundamentals of computer programming and will move on to mastering the concepts and principles involved in Ruby programming. Topics covered include formulating regular expressions, basic debugging techniques, and performing file and folder administration. For those students interested in learning how to do Web development with Ruby using Ruby on Rails, this book also provides the necessary prerequisite foundation and introduction.

Jerry Lee Ford, Jr. is an author, educator, and an IT professional with over 18 years of experience in information technology, including roles as an automation analyst, technical manager, technical support analyst, automation engineer, and security analyst. He is the author of 23 other books and co-author of two additional books. His published works include AppleScript Studio Programming for the Absolute Beginner, Microsoft Windows PowerShell Programming for the Absolute Beginner, Visual Basic 2005 Express Programming for the Absolute Beginner, VBScript Professional Projects, Microsoft Windows Shell Scripting and WSH Administrator's Guide, Microsoft Windows Shell Scripting for the Absolute Beginner, Learn JavaScript in a Weekend, and Microsoft Windows XP Professional Administrator's Guide.

Ford has a master's degree in business administration from Virginia Commonwealth University in Richmond, Virginia and has over five years of experience as an adjunct instructor teaching networking courses in information technology.

Table of content: Preface ____ p.xii
ch. 1 Ruby Basics ____ p.1
Project Preview: The Ruby Joke Game ____ p.2
A Brief History of Computers and Computer Programming ____ p.5
The Mechanized Era ____ p.5
The First Generation ____ p.6
The Second Generation ____ p.6
The Third Generation ____ p.7
The Fourth Generation ____ p.8
The Fifth Generation ____ p.9
1990 and Beyond ____ p.9
Introducing Ruby ____ p.10
Ruby is Simple Yet Powerful ____ p.11
Ruby is Object Oriented ____ p.13
Ruby is Extremely Flexible ____ p.14
Ruby Exists in Many Different Environments ____ p.14
Getting Ready to Work with Ruby ____ p.15
Determining Whether Ruby is Already Installed ____ p.15
Installing or Upgrading Ruby ____ p.17
Working with Ruby ____ p.21
Working at the Command Prompt ____ p.21
IRB---Interactive Ruby ____ p.21
fxri-Interactive Ruby Help and Console ____ p.23
Developing Ruby Programs ____ p.24
Creating Ruby Programs on Microsoft Windows ____ p.24
Creating Ruby Programs on Mac OS X ____ p.24
Creating Ruby Programs on Linux and UNIX ____ p.24
Using a Cross-Platform Ruby Editor ____ p.24
Creating Your First Ruby Program ____ p.25
Running Your Ruby Program ____ p.26
Back to the Ruby Joke Game ____ p.27
Designing the Game ____ p.27
Running Your New Ruby Program Game ____ p.32
Summing Up ____ p.35
Comprehension Check ____ p.36
Reinforcement Exercises ____ p.38
Discovery Projects ____ p.39
ch. 2 Interacting with Ruby ____ p.41
Project Preview: The Ruby Tall Tale Game ____ p.42
Getting to Know IRB ____ p.46
Starting an IRB Session ____ p.46
Working with Multiple IRB Sessions ____ p.48
Accessing IRB Online ____ p.48
Working with IRB ____ p.49
Executing Ruby Statements ____ p.49
Following Ruby's Syntax Rules ____ p.50
Executing Incomplete Statements ____ p.51
Using IRB to Test Ruby Scripts ____ p.51
Using IRB to Perform Mathematical Calculations ____ p.53
Using IRB as a Calculator ____ p.53
Accessing Methods Stored in the Math Module ____ p.54
Operator Precedence ____ p.54
Overriding Operator Precedence ____ p.55
Integers Versus Floating-Point Numbers ____ p.56
Accessing Ruby Documentation ____ p.56
Back to the Ruby Tall Tale Game ____ p.59
Designing the Ruby Tall Tale Game ____ p.60
Running Your New Ruby Script Game ____ p.65
Summing Up ____ p.70
Comprehension Check ____ p.71
Reinforcement Exercises ____ p.74
Discovery Projects ____ p.75
ch. 3 Working with Strings, Objects, and Variables ____ p.77
Project Preview: The Ruby Virtual Crazy 8-Ball Game ____ p.78
Creating and Formatting Text Strings ____ p.81
Modifying Text String Format ____ p.82
String Interpolation ____ p.83
Manipulating String Contents ____ p.83
Concatenating Text Strings ____ p.84
Multiplying Text Strings ____ p.84
Comparing Text Strings ____ p.85
Creating Multiline Text Strings ____ p.85
Working with String Class Methods ____ p.87
Object-Oriented Programming ____ p.88
Defining a New Class ____ p.88
Defining Class Properties ____ p.89
Instantiating and Interacting with New Objects ____ p.89
Defining Class Methods ____ p.90
Inheritance ____ p.91
Converting from One Class to Another ____ p.92
Implicit Class Conversion ____ p.93
Explicit Class Conversion ____ p.93
Storing and Retrieving Data ____ p.95
Naming Variables ____ p.96
Variable Assignments ____ p.96
Variable Scope ____ p.97
Storing Data That Does Not Change ____ p.98
Back to the Ruby Virtual Crazy 8-Ball Game ____ p.100
Designing the Game ____ p.100
Running Your New Ruby Script Game ____ p.107
Summing Up ____ p.107
Comprehension Check ____ p.108
Reinforcement Exercises ____ p.111
Discovery Projects ____ p.112
ch. 4 Implementing Conditional Logic ____ p.114
Project Preview: The Ruby Typing Challenge Game ____ p.115
Using Conditional Logic to Create Adaptive Scripts ____ p.119
Performing Alternative Types of Comparisons ____ p.121
Conditional Logic Modifiers ____ p.122
The if Modifier ____ p.122
The unless Modifier ____ p.122
Working with if and unless Expressions ____ p.123
Creating if Expressions ____ p.123
Replacing if Modifiers with if Expressions ____ p.124
Creating unless Expressions ____ p.126
Using case Blocks to Analyze Data ____ p.127
Using the Ternary Operator ____ p.129
Nesting Conditional Statements ____ p.129
Combining and Negating Logical Comparison Operations ____ p.130
Back to the Ruby Typing Challenge Game ____ p.132
Designing the Game ____ p.132
Running Your New Ruby Script Game ____ p.140
Summing Up ____ p.140
Comprehension Check ____ p.141
Reinforcement Exercises ____ p.144
Discovery Projects ____ p.145
ch. 5 Working with Loops ____ p.146
Project Preview: The Superman Movie Trivia Quiz ____ p.147
Understanding Loops ____ p.150
Using Language Constructs to Create Loops ____ p.151
Working with while Loops ____ p.151
Working with until Loops ____ p.152
Working with for...in Loops ____ p.153
Using Loop Modifiers ____ p.154
The while Modifier ____ p.154
The until Modifier ____ p.155
Executing Looping Methods ____ p.156
Working with the each Method ____ p.156
Working with the times Method ____ p.157
Working with the upto Method ____ p.158
Working with the downto Method ____ p.159
Working with the step Method ____ p.160
Working with the loop Method ____ p.161
Altering Loop Execution ____ p.162
Prematurely Terminating Loop Execution ____ p.162
Repeating the Current Execution of a Loop ____ p.163
Skipping to the Next Iteration of a Loop ____ p.163
Restarting a Loop from the Beginning ____ p.164
Back to the Superman Movie Trivia Quiz ____ p.165
Designing the Game ____ p.165
Running Your New Ruby Script Game ____ p.174
Summing Up ____ p.174
Comprehension Check ____ p.175
Reinforcement Exercises ____ p.178
Discovery Projects ____ p.179
ch. 6 Working with Collections of Data ____ p.181
Project Preview: The Ruby Number Guessing Game ____ p.182
Storing and Manipulating Lists Using Arrays ____ p.186
Managing Data Using Arrays ____ p.186
Replacing and Adding Array Items ____ p.188
Determining if an Array is Empty ____ p.190
Retrieving Items from an Array ____ p.190
Using a Loop to Iterate Through the Contents of an Array ____ p.192
Deleting Items from an Array ____ p.192
Sorting the Contents of an Array Alphabetically ____ p.194
Sorting Array Contents in Reverse Alphabetical Order ____ p.194
Searching an Array ____ p.195
Storing and Manipulating Lists Using Hashes ____ p.196
Creating a Hash ____ p.196
Adding a Hash's Key-Value Pairs ____ p.198
Deleting a Hash's Key-Value Pairs ____ p.199
Determining the Number of Key-Value Pairs in a Hash ____ p.200
Retrieving Data Stored in Hashes ____ p.201
Sorting Hash keys ____ p.202
Back to the Ruby Number Guessing Game ____ p.204
Designing the Game ____ p.204
Running Your New Ruby Script Game ____ p.212
Summing Up ____ p.212
Comprehension Check ____ p.214
Reinforcement Exercises ____ p.217
Discovery Projects ____ p.219
ch. 7 Working with Regular Expressions ____ p.221
Project Preview: The Ruby Word Guessing Game ____ p.222
Using Regular Expressions for Data Validation ____ p.227
Matching Basic Patterns ____ p.228
Matching Specific Patterns ____ p.228
Matching Multiple Patterns ____ p.228
Working with Metacharacters ____ p.230
Escaping Metacharacters ____ p.231
Matching Individual Characters ____ p.231
Matching a Pattern at the Beginning of a String ____ p.231
Matching a Pattern at the End of a String ____ p.232
Matching Once or Not at All ____ p.232
Matching Zero or More Times ____ p.232
Matching Any of a Collection of Characters ____ p.233
Other Uses for Regular Expressions ____ p.233
Overcoming Differences in Case ____ p.234
String Substitution ____ p.234
Back to the Ruby Word Guessing Game ____ p.236
Designing the Game ____ p.236
Running Your New Ruby Script Game ____ p.249
Summing Up ____ p.249
Comprehension Check ____ p.251
Reinforcement Exercises ____ p.254
Discovery Projects ____ p.255
ch. 8 Object-Oriented Programming ____ p.257
Project Preview: The Rock, Paper, Scissors Game ____ p.258
Key Features of Object-Oriented Programming ____ p.262
Abstraction ____ p.262
Encapsulation ____ p.263
Inheritance ____ p.266
Polymorphism ____ p.267
Initializing Objects Upon Instantiation ____ p.269
Understanding Variable Scope ____ p.271
Working with Local Variables ____ p.271
Working with Global Variables ____ p.271
Working with Instance Variables ____ p.273
Working with Class Variables ____ p.273
Taking Advantage of Ruby's Built-in Classes ____ p.274
Modifying Ruby Classes ____ p.275
Back to the Rock, Paper, Scissors Game ____ p.277
Designing the Game ____ p.277
Running Your New Ruby Program Game ____ p.286
Summing Up ____ p.286
Comprehension Check ____ p.287
Reinforcement Exercises ____ p.290
Discovery Projects ____ p.292
ch. 9 File and Folder Administration ____ p.294
Project Preview: The Ruby Blackjack Game ____ p.295
Redirecting File Input and Output ____ p.299
Administering Text Files and Folders ____ p.300
Verifying Whether a File or Folder Exists ____ p.300
Retrieving Information About a File or Folder ____ p.301
Creating New Folders ____ p.303
Deleting Files and Folders ____ p.304
Renaming Files ____ p.304
Working with Files and Folders on Different Operating Systems ____ p.305
Reading From and Writing to Text Files ____ p.306
Writing Data to Text Files ____ p.307
Appending Data to the End of Text Files ____ p.308
Reading Data from Text Files ____ p.309
Back to the Ruby Blackjack Game ____ p.311
Designing the Game ____ p.311
Running Your New Ruby Script Game ____ p.321
Summing Up ____ p.322
Comprehension Check ____ p.323
Reinforcement Exercises ____ p.326
Discovery Projects ____ p.329
ch. 10 Debugging ____ p.331
Project Preview: The Ruby Tic-Tac-Toe Game ____ p.332
Types of Script Errors ____ p.335
Syntax Errors ____ p.336
Runtime Errors ____ p.336
Logical Errors ____ p.337
Handling Exceptions ____ p.337
Creating Exception Handlers ____ p.337
Accessing Error Information ____ p.338
Handling Different Types of Errors ____ p.339
Retrying Failed Statements ____ p.339
Tracking a Script's Logical Flow ____ p.341
Finding Bugs Using the Ruby Debugger ____ p.342
Starting the Debugger ____ p.342
Back to the Ruby Tic-Tac-Toe Game ____ p.347
Designing the Game ____ p.347
Running Your New Ruby Script Game ____ p.359
Summing Up ____ p.360
Comprehension Check ____ p.361
Reinforcement Exercises ____ p.364
Discovery Projects ____ p.366
ch. 11 Ruby on Rails Web Development ____ p.368
Project Preview: The Blog Application ____ p.369
Overview of Ruby on Rails ____ p.369
Skills Needed to Work with Ruby on Rails ____ p.371
Required Software ____ p.371
Development Philosophy ____ p.371
Architecture ____ p.372
Working with Database Management Systems ____ p.374
Getting Ruby on Rails Up and Running ____ p.375
Installing Ruby On Rails ____ p.375
Selecting a Web Server ____ p.377
Installing the SQLite Database Management System ____ p.377
Verifying Ruby on Rails Setup ____ p.377
Creating a Demo Application ____ p.378
Verifying the Execution of Your Web Server ____ p.379
Ruby on Rails Applications Files ____ p.381
Back to the Blog Application ____ p.384
Design the Blog Application ____ p.384
Running Your New Ruby on Rails Project ____ p.386
Learning More About Ruby on Rails ____ p.387
Summing Up ____ p.388
Comprehension Check ____ p.390
Reinforcement Exercises ____ p.393
Discovery Projects ____ p.400
Glossary ____ p.401
Index ____ p.407
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