Beginning Perl 3rd Edition by James Lee 9781430227946 143022794X

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ISBN 10: 143022794X
ISBN 13: 9781430227946 
Author: James Lee

This is a book for those of us who believed that we didn’t need to learn Perl, and now we know it is more ubiquitous than ever. Perl is extremely flexible and powerful, and it isn’t afraid of Web 2.0 or the cloud. Originally touted as the duct tape of the Internet, Perl has since evolved into a multipurpose, multiplatform language present absolutely everywhere: heavy-duty web applications, the cloud, systems administration, natural language processing, and financial engineering. Beginning Perl, Third Edition provides valuable insight into Perl’s role regarding all of these tasks and more. Commencing with a comprehensive overview of language basics, you’ll learn all about important concepts such as Perl’s data types and control flow constructs. This material sets the stage for a discussion of more complex topics, such as writing custom functions, using regular expressions, and file input and output. Next, the book moves on to the advanced topics of object-oriented programming, modules, web programming, and database administration with Perl’s powerful database interface module, DBI. The examples and code provided offer you all of the information you need to start writing your own powerful scripts to solve the problems listed above, and many more. Whether you are a complete novice or an experienced programmer, Beginning Perl, Third Edition offers an ideal guide to learning Perl.

Beginning Perl 3rd Table of contents:

CHAPTER 1: First Steps in Perl

• Programming Languages
• Our First Perl Program
• Program Structure
• Documenting Your Programs
• Keywords
• Statements and Statement Blocks
• Character Sets
• Escape Sequences
• Whitespace
• Number Systems
• The Perl Debugger
• Summary
• Exercises

CHAPTER 2: Scalars

• Types of Data
• Numbers
• Binary, Hexadecimal, and Octal Numbers
• Strings
• Single- vs. Double-Quoted Strings
• q// and qq//
• Here-Documents
• Converting Between Numbers and Strings
• Operators
• Numeric Operators
• Arithmetic Operators
• Bitwise Operators
• Truth and Falsehood
• Boolean Operators
• String Operators
• String Comparison
• Operators to Be Covered Later
• Operator Precedence
• Variables
• Scoping
• Variable Names
• The Special Variable $_
• Variable Interpolation
• Currency Converter
• Introducing
• The chomp() and chop() Functions
• Two Miscellaneous Functions
• The exit() Function
• The die() Function
• Summary
• Exercises

CHAPTER 3: Control Flow Constructs

• The if Statement
• Operators Revisited
• Comparing Numbers
• Comparing Strings
• Other Tests
• Logical Operators
• Multiple Choice: if . . . else
• Even More Choices: if . . . elsif . . . else
• The unless Statement
• Expression Modifiers
• Using Short-Circuited Evaluation
• Looping Constructs
• The while Loop
• while ()
• Infinite Loops
• Looping Until
• The for Loop
• The foreach Loop
• do .. while and do .. until
• Expression Modifying
• Loop Control Constructs
• Breaking Out
• Going On to the Next
• Reexecuting the Loop
• Loop Labels
• goto
• Summary
• Exercises

CHAPTER 4: Lists and Arrays

• Lists
• Simple Lists
• More Complex Lists
• Creating Lists Easily with qw//
• Ranges
• Accessing List Values
• List Slices
• Combining Ranges and Slices
• Arrays
• Assigning Arrays
• Scalar vs. List Context
• Adding to an Array
• Accessing an Array
• Accessing Single Elements
• $#array
• Looping Through an Array with Indexes
• Accessing Multiple Elements
• Processing Arrays with the foreach Loop
• Choosing an Iterator
• Modifying the Value of an Iterator
• Expression Modifier for the foreach Loop
• Array Functions
• Summary
• Exercises

CHAPTER 5: Hashes

• Creating a Hash
• Working with Hash Values
• Adding, Changing, and Removing Elements
• Hash in List Context
• Hash in Scalar Context
• Hash Functions
• The keys() Function
• The values() Function
• The each() Function
• The delete() Function
• The exists() Function
• Hash Examples
• Creating Readable Variables
• “Reversing” Information
• Counting Things
• Summary
• Exercises

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