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Preface 
1. Introduction

      Questions and Answers 

      What Does "Perl" Stand For? 

      How Can I Get Perl? 

      How Do I Make a Perl Program? 

      A Whirlwind Tour of Perl 

      Exercises 
2. Scalar Data

      Numbers 

      Strings 

      Perl's Built-in Warnings 

      Scalar Variables 

      Output with print 

      The if Control Structure 

      Getting User Input 

      The chomp Operator 

      The while Control Structure 

      The undef Value 

      The defined Function 

      Exercises 
3. Lists and Arrays

      Accessing Elements of an Array 

      Special Array Indices 

      List Literals 

      List Assignment 

      Interpolating Arrays into Strings 

      The foreach Control Structure 

      Scalar and List Context 

      <STDIN> in List Context 

      Exercises 
4. Subroutines

      Defining a Subroutine 

      Invoking a Subroutine 

      Return Values 

      Arguments 

      Private Variables in Subroutines 

      Variable-Length Parameter Lists 

      Notes on Lexical (my) Variables 

      The use strict Pragma 

      The return Operator 

      Non-Scalar Return Values 

      Exercises 
5. Input and Output

      Input from Standard Input 

      Input from the Diamond Operator 

      The Invocation Arguments 

      Output to Standard Output 

      Formatted Output with printf 

      Filehandles 

      Opening a Filehandle 

      Fatal Errors with die 

      Using Filehandles 

      Reopening a Standard Filehandle 

      Exercises 
6. Hashes

      What Is a Hash? 

      Hash Element Access 

      Hash Functions 

      Typical Use of a Hash 

      Exercises 
7. In the World of Regular Expressions

      What Are Regular Expressions? 

      Using Simple Patterns 

      Character Classes 

      Exercises 
8. Matching with Regular Expressions

      Matches with m// 

      Option Modifiers 

      Anchors 

      The Binding Operator, =~ 

      Interpolating into Patterns 

      The Match Variables 

      General Quantifiers 

      Precedence 

      A Pattern Test Program 

      Exercises 
9. Processing Text with Regular Expressions

      Substitutions with s/// 

      The split Operator 

      The join Function 

      m// in List Context 

      More Powerful Regular Expressions 

      Exercises 
10. More Control Structures

      The unless Control Structure 

      The until Control Structure 

      Expression Modifiers 

      The Naked Block Control Structure 

      The elsif Clause 

      Autoincrement and Autodecrement 

      The for Control Structure 

      Loop Controls 

      Logical Operators 

      Exercise 
11. File Tests

      File Test Operators 

      The stat and lstat Functions 

      The localtime Function 

      Bitwise Operators 

      Using the Special Underscore Filehandle 

      Exercises 
12. Directory Operations

      Moving Around the Directory Tree 

      Globbing 

      An Alternate Syntax for Globbing 

      Directory Handles 

      Recursive Directory Listing 

      Manipulating Files and Directories 

      Removing Files 

      Renaming Files 

      Links and Files 

      Making and Removing Directories 

      Modifying Permissions 

      Changing Ownership 

      Changing Timestamps 

      Exercises 
13. Strings and Sorting

      Finding a Substring with index 

      Manipulating a Substring with substr 

      Formatting Data with sprintf 

      Advanced Sorting 

      Exercises 
14. Process Management

      The system Function 

      The exec Function 

      The Environment Variables 

      Using Backquotes to Capture Output 

      Processes as Filehandles 

      Getting Down and Dirty with fork 

      Sending and Receiving Signals 

      Exercises 
15. Perl Modules

      Finding Modules 

      Installing Modules 

      Using Simple Modules 

      Exercise 
16. Some Advanced Perl Techniques

      Trapping Errors with eval 

      Picking Items from a List with grep 

      Transforming Items from a List with map 

      Unquoted Hash Keys 

      Slices 

      Exercise 
A. Exercise Answers
B. Beyond the Llama
Index