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| Introduction | |
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| Getting Started | |
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| An Introduction to Perl | |
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| What Is Perl and Where Did It Come From? | |
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| Why Learn Perl? | |
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| Getting Started Programming in Perl | |
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| An Example: The Ubiquitous Hello World | |
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| Another Example: Create Hello World As a Script | |
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| Another Example: Echo | |
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| A Third Example: The Cookie Monster | |
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| Going Deeper | |
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| Working with Strings and Numbers (Scalar Data) | |
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| Scalar Data and Scalar Variables | |
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| Constructing Perl Scripts | |
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| Arithmetic Operators | |
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| One-Liners: Simple Calculator | |
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| An Example: Converting Fahrenheit to Celsius | |
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| Operators for Tests and Comparisons | |
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| Another Example: More Cookies | |
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| Going Deeper | |
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| More Scalar Data and Operators | |
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| Assignment Operators | |
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| Increment and Decrement Operators | |
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| String Concatenation and Repetition | |
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| Operator Precedence and Associativity | |
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| Using Patterns to Match Digits | |
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| An Example: Simple Statistics | |
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| Input and Output | |
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| Another Example: Stocks | |
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| A Note About Using Functions | |
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| Going Deeper | |
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| Working with Lists and Arrays | |
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| List Data and Variables | |
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| Defining and Using Lists and Arrays | |
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| An Example: More Stats | |
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| List and Scalar Context | |
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| Input, Output, and Lists | |
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| Going Deeper | |
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| Working with Hashes | |
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| Hashes Versus Arrays and Lists | |
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| Defining and Using Hashes | |
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| An Example: Frequencies in the Statistics Program | |
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| Another Example: Alphabetical Lists of Names | |
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| A Few More Patterns | |
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| Yet Another Example: Stock Price Converter | |
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| Going Deeper | |
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| Conditionals and LoopsComplex Statements and Blocks | |
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| Conditionals | |
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| while Loops | |
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| An Example: Pick a Number | |
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| Iteration with foreach and for Loops | |
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| Controlling Loops | |
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| Using the $_ (default) Variable | |
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| Input from Files with while Loops and <> | |
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| Going Deeper | |
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| Exploring a Few Longer Examples | |
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| Statistics with a Better Histogram | |
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| A Number Speller | |
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| Text-to-HTML Converter Script | |
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| Doing More | |
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| Manipulating Lists and Strings | |
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| Array and Hash Slices | |
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| Sorting Lists | |
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| Searching | |
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| An Example: More Names | |
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| Modifying List Elements | |
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| Other Ways to Mess with Lists | |
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| Manipulating Strings | |
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| Going Deeper | |
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| Pattern Matching with Regular Expressions | |
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| The Whys and Wherefores of Pattern Matching | |
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| Pattern Matching Operators and Expressions | |
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| Simple Patterns | |
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| Matching Groups of Characters | |
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| Matching Multiple Instances of Characters | |
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| An Example: A Guessing Program | |
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| More About Building Patterns | |
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| Another Example: Counting | |
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| Pattern Precedence | |
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| Going Deeper | |
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| Doing More with Regular Expressions | |
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| Extracting Matches | |
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| An Example: Extracting Attributes from HTML Tags | |
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| Using Patterns for Search and Replace | |
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| More About split | |
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| Matching Patterns over Multiple Lines | |
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| A Summary of Options and Escapes | |
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| An Example: Image Extractor | |
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| Going Deeper | |
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| Creating and Using Subroutines | |
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| Subroutines Versus Functions | |
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| Defining and Calling Basic Subroutines | |
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| An Example: Son of Stats | |
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| Returning Values from Subroutines | |
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| Using Local Variables in Subroutines | |
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| Passing Values into Subroutines | |
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| Subroutines and Context | |
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| Another Example: Stats with a Menu | |
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| Going Deeper | |
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| Debugging Perl | |
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| Using the Debugger: A Simple Example | |
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| Starting and Running the Debugger | |
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| Perl Debugger Command Reference | |
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| Using a Graphical Debugger | |
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| Going Deeper | |
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| Scope, Modules, and Importing Code | |
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| Global Variables and Packages | |
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| Local Scope and Variables | |
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| Using Perl Modules | |
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| An Example: Using the Text::Wrap Module | |
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| Using Modules from CPAN (The Comprehensive Perl Archive Network) | |
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| Going Deeper | |
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| Exploring a Few Longer Examples | |
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| A Searchable Address Book (addresspl) | |
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| A Web Log Processor (weblogpl) | |
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| Advanced Perl | |