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    Programming Perl, 4th Edition

    • Programming Perl, 4th Edition

    • By: ; ; ;

    • Publisher: O'Reilly Media, Inc.

    • Pub. Date:

    • Print ISBN-13: 978-0-596-00492-7

    • Pages in Print Edition: 1184

    • Subscriber Rating: 0 out of 5 rating0 [0 Ratings]

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    Overview

    Adopted as the undisputed Perl bible soon after the first edition appeared in 1991, Programming Perl is still the go-to guide for this highly practical language. In this much-anticipated update to "the Camel," three renowned Perl authors cover the language up to its current version, Perl 5.14, with a preview of features in the upcoming 5.16.

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    Table of Contents

     

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    Copyright

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    Table of Contents

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    List of Tables

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    Preface
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    The Pursuit of Happiness

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    What's New in This Edition

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    The Standard Distribution

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    Online Documentation
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    Navigating the Standard Manpages

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    Non-Perl Manpages

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    Offline Documentation

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    Additional Resources
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    Perl on the Web

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    Bug Reports

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    Conventions Used in This Book

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    Acknowledgments

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    Safariﾮ Books Online

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    We'd Like to Hear from You

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    Part I. Overview

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    Chapter 1. An Overview of Perl
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    Getting Started

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    Natural and Artificial Languages

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    Variable Syntax
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    Singularities

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    Pluralities
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    Arrays

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    Hashes

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    Complexities

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    Simplicities

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    Verbs

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    An Average Example
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    How to Do It

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    Filehandles

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    Operators
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    Some Binary Arithmetic Operators

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    String Operators

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    Assignment Operators

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    Unary Arithmetic Operators

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    Logical Operators

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    Some Numeric and String Comparison Operators

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    Some File Test Operators

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    Control Structures

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    What Is Truth?
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    The if and unless statements

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    The given and when Statements

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    Looping Constructs
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    Conditional loops

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    The three-part loop

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    The foreach loop

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    Breaking out: next and last

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    Regular Expressions
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    Quantifiers

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    Minimal Matching

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    Nailing Things Down

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    Backreferences

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    List Processing

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    What You Don't Know Won't Hurt You (Much)

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    Part II. The Gory Details

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    Chapter 2. Bits and Pieces
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    Atoms

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    Molecules

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    Built-in Data Types

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    Variables

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    Names
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    Name Lookups

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    Scalar Values
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    Numeric Literals

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    String Literals

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    Pick Your Own Quotes

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    Or Leave Out the Quotes Entirely

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    Interpolating Array Values

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    "Here" Documents

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    Version Literals

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    Other Literal Tokens

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    Context
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    Scalar and List Context

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    Boolean Context

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    Void Context

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    Interpolative Context

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    List Values and Arrays
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    List Assignment

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    Array Length

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    Hashes

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    Typeglobs and Filehandles

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    Input Operators
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    Command Input (Backtick) Operator

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    Line Input (Angle) Operator

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    Filename Globbing Operator

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    Chapter 3. Unary and Binary Operators
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    Terms and List Operators (Leftward)

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    The Arrow Operator

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    Autoincrement and Autodecrement

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    Exponentiation

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    Ideographic Unary Operators

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    Binding Operators

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    Multiplicative Operators

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    Additive Operators

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    Shift Operators

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    Named Unary and File Test Operators

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    Relational Operators

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    Equality Operators

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    Smartmatch Operator
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    Smartmatching of Objects

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    Bitwise Operators

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    C-Style Logical (Short-Circuit) Operators

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    Range Operators

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    Conditional Operator

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    Assignment Operators

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    Comma Operators

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    List Operators (Rightward)

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    Logical and, or, not, and xor

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    C Operators Missing from Perl

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    Chapter 4. Statements and Declarations
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    Simple Statements

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    Compound Statements

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    if and unless Statements

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    The given Statement
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    The when Statement and Modifier

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    Loop Statements
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    while and until Statements

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    Three-Part Loops

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    foreach Loops

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    Loop Control

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    Bare Blocks as Loops

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    Loopy Topicalizers

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    The goto Operator

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    Paleolithic Perl Case Structures

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    The Ellipsis Statement

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    Global Declarations

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    Scoped Declarations
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    Scoped Variable Declarations

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    Lexically Scoped Variables: my

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    Persistent Lexically Scoped Variables: state

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    Lexically Scoped Global Declarations: our

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    Dynamically Scoped Variables: local

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    Pragmas
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    Controlling Warnings

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    Controlling the Use of Globals

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    Chapter 5. Pattern Matching
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    The Regular Expression Bestiary

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    Pattern-Matching Operators
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    Pattern Modifiers

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    The m// Operator (Matching)

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    The s/// Operator (Substitution)
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    Modifying strings en passant

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    Modifying arrays en masse

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    When a global substitution just isn't global enough

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    The tr/// Operator (Transliteration)

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    Metacharacters and Metasymbols
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    Metasymbol Tables

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    Specific Characters

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    Wildcard Metasymbols

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    Character Classes
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    Bracketed Character Classes

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    Classic Perl Character Class Shortcuts

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    Character Properties

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    POSIX-Style Character Classes

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    Quantifiers

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    Positions
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    Beginnings: The \A and ^ Assertions

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    Endings: The \z, \Z, and $ Assertions

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    Boundaries: The \b and \B Assertions

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    Progressive Matching

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    Where You Left Off: The \G Assertion

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    Grouping and Capturing

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    Capturing
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    Named capture groups

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    Grouping Without Capturing

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    Scoped Pattern Modifiers

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    Alternation

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    Staying in Control
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    Letting Perl Do the Work

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    Variable Interpolation
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    When backslashes happen

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    The qr/PATTERN/modifiers quote regex operator

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    The Regex Compiler

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    The Little Engine That /Could(n't)?/

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    Fancy Patterns
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    Lookaround Assertions

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    Possessive Groups

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    Programmatic Patterns
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    Generated patterns

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    Substitution evaluations

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    Match-time code evaluation

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    Match-time pattern interpolation

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    Conditional interpolation

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    Recursive Patterns

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    Grammatical Patterns
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    Grammars

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    Defining Your Own Assertions

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    Alternate Engines

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    Chapter 6. Unicode
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    Show, Don't Tell

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    Getting at Unicode Data
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    The Encode Module

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    A Case of Mistaken Identity

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    Graphemes and Normalization

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    Comparing and Sorting Unicode Text
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    Using the uca with Perl's sort

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    Locale Sorting

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    More Goodies
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    Custom Regex Boundaries

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    Building Character

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    References

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    Chapter 7. Subroutines
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    Syntax

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    Semantics
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    Tricks with Parameter Lists

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    Error Indications

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    Scoping Issues

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    Passing References

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    Prototypes
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    Inlining Constant Functions

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    Care with Prototypes

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    Prototypes of Built-in Functions

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    Subroutine Attributes
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    The method Attribute

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    The lvalue Attribute

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    Chapter 8. References
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    What Is a Reference?

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    Creating References
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    The Backslash Operator

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    Anonymous Data
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    The anonymous array composer

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    The anonymous hash composer

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    The anonymous subroutine composer

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    Object Constructors

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    Handle References

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    Symbol Table References

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    Implicit Creation of References

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    Using Hard References
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    Using a Variable As a Variable Name

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    Using a block As a Variable Name

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    Using the Arrow Operator

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    Using Object Methods

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    Pseudohashes

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    Other Tricks You Can Do with Hard References

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    Closures
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    Closures as function templates

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    Nested subroutines

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    Symbolic References

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    Braces, Brackets, and Quoting
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    References Don't Work As Hash Keys

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    Garbage Collection, Circular References, and Weak References

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    Chapter 9. Data Structures

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    Arrays of Arrays
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    Creating and Accessing a Two-Dimensional Array

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    Growing Your Own

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    Access and Printing

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    Slices

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    Common Mistakes

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    Hashes of Arrays
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    Composition of a Hash of Arrays

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    Generation of a Hash of Arrays

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    Access and Printing of a Hash of Arrays

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    Arrays of Hashes
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    Composition of an Array of Hashes

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    Generation of an Array of Hashes

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    Access and Printing of an Array of Hashes

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    Hashes of Hashes
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    Composition of a Hash of Hashes

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    Generation of a Hash of Hashes

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    Access and Printing of a Hash of Hashes

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    Hashes of Functions

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    More Elaborate Records
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    Composition, Access, and Printing of More Elaborate Records

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    Composition, Access, and Printing of Even More Elaborate Records

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    Generation of a Hash of Complex Records

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    Saving Data Structures

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    Chapter 10. Packages
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    Symbol Tables

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    Qualified Names

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    The Default Package

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    Changing the Package

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    Autoloading

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    Chapter 11. Modules
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    Loading Modules

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    Unloading Modules

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    Creating Modules
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    Naming Modules

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    A Sample Module

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    Module Privacy and the Exporter
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    Exporting without using Exporter's import method

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    Version checking

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    Managing unknown symbols

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    Tag-handling utility functions

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    Overriding Built-in Functions

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    Chapter 12. Objects
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    Brief Refresher on Object-Oriented Lingo

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    Perl's Object System

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    Method Invocation
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    Method Invocation Using the Arrow Operator

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    Method Invocation Using Indirect Objects

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    Syntactic Snafus with Indirect Objects

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    Package-Quoted Classes

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    Object Construction
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    Inheritable Constructors

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    Initializers

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    Class Inheritance
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    Inheritance Through @ISA

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    Alternate Method Searching

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    Accessing Overridden Methods

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    UNIVERSAL: The Ultimate Ancestor Class

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    Method Autoloading

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    Private Methods

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    Instance Destructors
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    Garbage Collection with destroy Methods

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    Managing Instance Data
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    Generating Accessors with Autoloading

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    Generating Accessors with Closures

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    Using Closures for Private Objects

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    New Tricks

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    Managing Class Data

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    The Moose in the Room

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    Summary

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    Chapter 13. Overloading
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    The overload Pragma

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    Overload Handlers

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    Overloadable Operators

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    The Copy Constructor (=)

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    When an Overload Handler Is Missing (nomethod and fallback)

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    Overloading Constants

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    Public Overload Functions

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    Inheritance and Overloading

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    Runtime Overloading

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    Overloading Diagnostics

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    Chapter 14. Tied Variables

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    Tying Scalars
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    Scalar-Tying Methods

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    Magical Counter Variables

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    Cycling Through Values

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    Magically Banishing $_

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    Tying Arrays
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    Array-Tying Methods

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    Notational Convenience

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    Tying Hashes
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    Hash-Tying Methods

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    Tying Filehandles
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    Filehandle-Tying Methods

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    Creative Filehandles

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    A Subtle Untying Trap

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    Tie Modules on CPAN

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    Part III. Perl as Technology

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    Chapter 15. Interprocess Communication

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    Signals
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    Signalling Process Groups

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    Reaping Zombies

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    Timing Out Slow Operations

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    Blocking Signals

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    Signal Safety

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    Files
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    File Locking

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    Passing Filehandles

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    Pipes
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    Anonymous Pipes

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    Talking to Yourself

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    Bidirectional Communication

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    Named Pipes

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    System V IPC

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    Sockets
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    Networking Clients

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    Networking Servers

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    Message Passing

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    Chapter 16. Compiling
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    The Life Cycle of a Perl Program

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    Compiling Your Code

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    Executing Your Code

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    Compiler Backends

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    Code Generators
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    The Bytecode Generator

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    The C Code Generators

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    Code Development Tools

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    Avant-Garde Compiler, Retro Interpreter

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    Chapter 17. The Command-Line Interface

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    Command Processing
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    #! and Quoting on Non-Unix Systems

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    Location of Perl

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    Switches

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    Environment Variables

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    Chapter 18. The Perl Debugger
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    Using the Debugger

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    Debugger Commands
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    Stepping and Running

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    Breakpoints

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    Tracing

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    Display

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    Locating Code

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    Actions and Command Execution

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    Miscellaneous Commands

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    Debugger Customization
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    Editor Support for Debugging

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    Customizing with Init Files

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    Debugger Options

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    Unattended Execution

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    Debugger Support
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    Writing Your Own Debugger

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    Profiling Perl
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    Devel::DProf

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    Devel::NYTProf

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    Chapter 19. CPAN
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    History

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    A Tour of the Repository
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    Creating a MiniCPAN

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    The CPAN Ecosystem
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    PAUSE

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    Searching CPAN

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    Testing

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    Bug Tracking
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    rt.cpan.org

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    Other bug tracking

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    perlbug

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    rt.perl.org

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    Installing CPAN Modules
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    By Hand

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    CPAN Clients
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    cpan

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    cpanp

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    cpanminus

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    Creating CPAN Distributions

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    Starting Your Distribution
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    h2xs

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    Distribution::Cooker

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    Module::Starter

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    Dist::Zilla

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    Testing Your Modules
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    Internal testing

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    External testing

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    Part IV. Perl as Culture

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    Chapter 20. Security

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    Handling Insecure Data
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    Detecting and Laundering Tainted Data

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    Cleaning Up Your Environment

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    Accessing Commands and Files Under Reduced Privileges

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    Defeating Taint Checking

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    Handling Timing Glitches
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    Unix Kernel Security Bugs

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    Handling Race Conditions

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    Temporary Files

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    Handling Insecure Code
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    Changing Root

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    Safe Compartments
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    Restricting namespace access

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    Restricting operator access

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    Safe examples

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    Code Masquerading As Data

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    Chapter 21. Common Practices

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    Common Goofs for Novices
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    Universal Blunders

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    Frequently Ignored Advice

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    C Traps

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    Shell Traps

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    Python Traps

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    Ruby Traps

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    Java Traps

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    Efficiency
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    Time Efficiency

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    Space Efficiency

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    Programmer Efficiency

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    Maintainer Efficiency

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    Porter Efficiency

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    User Efficiency

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    Programming with Style

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    Fluent Perl

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    Program Generation
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    Generating Other Languages in Perl

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    Generating Perl in Other Languages

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    Source Filters

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    Chapter 22. Portable Perl
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    Newlines

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    Endianness and Number Width

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    Files and Filesystems

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    System Interaction

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    Interprocess Communication (IPC)

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    External Subroutines (XS)

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    Standard Modules

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    Dates and Times

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    Internationalization

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    Style

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    Chapter 23. Plain Old Documentation

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    Pod in a Nutshell
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    Verbatim Paragraphs

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    Command Paragraphs

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    Flowed Text

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    Pod Translators and Modules

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    Writing Your Own Pod Tools

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    Pod Pitfalls

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    Documenting Your Perl Programs

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    Chapter 24. Perl Culture
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    History Made Practical

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    Perl Poetry

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    Virtues of the Perl Programmer

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    Events

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    Getting Help

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    Part V. Reference Material

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    Chapter 25. Special Names

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    Special Names Grouped by Type
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    Regular Expression Special Variables

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    Per-Filehandle Variables

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    Per-Package Special Variables

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    Program-Wide Special Variables

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    Per-Package Special Filehandles

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    Per-Package Special Functions

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    Special Variables in Alphabetical Order

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    Chapter 26. Formats
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    String Formats

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    Binary Formats

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    pack
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    Repetition

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    Other modifiers

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    More examples

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    unpack

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    Picture Formats
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    Format Variables

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    Footers

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    Accessing Formatting Internals

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    Chapter 27. Functions
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    Perl Functions by Category

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    Perl Functions in Alphabetical Order
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    abs

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    accept

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    alarm

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    atan2

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    bind

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    binmode

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    bless

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    break

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    caller

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    chdir

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    chmod

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    chomp

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    chop

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    chown

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    chr

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    chroot

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    close

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    closedir

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    connect

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    continue

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    cos

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    crypt

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    dbmclose

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    dbmopen

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    defined

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    delete

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    die

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    do (block)

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    do (file)

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    do (subroutine)

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    dump

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    each

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    eof

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    eval

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    exec

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    exists

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    exit

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    exp

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    __FILE__

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    fc

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    fcntl

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    fileno

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    flock

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    fork

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    format

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    formline

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    getc

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    getgrent

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    getgrgid

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    getgrnam

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    gethostbyaddr

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    gethostbyname

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    gethostent

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    getlogin

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    getnetbyaddr

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    getnetbyname

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    getnetent

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    getpeername

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    getpgrp

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    getppid

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    getpriority

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    getprotobyname

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    getprotobynumber

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    getprotoent

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    getpwent

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    getpwnam

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    getpwuid

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    getservbyname

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    getservbyport

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    getservent

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    getsockname

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    getsockopt

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    glob

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    gmtime

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    goto

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    grep

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    hex

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    import

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    index

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    int

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    ioctl

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    join

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    keys

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    kill

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    last

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    lc

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    lcfirst

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    length

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    __LINE__

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    link

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    listen

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    local

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    localtime

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    lock

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    log

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    lstat

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    m//

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    map

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    mkdir

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    msgctl

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    msgget

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    msgrcv

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    msgsnd

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    my

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    new

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    next

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    no

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    oct

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    open

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    opendir

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    ord

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    our

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    pack

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    package

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    __PACKAGE__

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    pipe

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    pop

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    pos

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    print

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    printf

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    prototype

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    push

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    q/STRING/

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    quotemeta

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    rand

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    read

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    readdir

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    readline

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    readlink

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    readpipe

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    recv

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    redo

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    ref

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    rename

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    require

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    reset

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    return

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    reverse

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    rewinddir

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    rindex

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    rmdir

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    s///

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    say

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    scalar

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    seek

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    seekdir

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    select (output filehandle)

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    select (ready file descriptors)

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    semctl

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    semget

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    semop

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    send

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    setpgrp

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    setpriority

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    setsockopt

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    shift

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    shmctl

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    shmget

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    shmread

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    shmwrite

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    shutdown

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    sin

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    sleep

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    socket

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    socketpair

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    sort

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    splice

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    split

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    sprintf

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    sqrt

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    srand

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    stat

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    state

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    study

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    sub

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    substr

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    symlink

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    syscall

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    sysopen

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    sysread

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    sysseek

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    system

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    syswrite

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    tell

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    telldir

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    tie

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    tied

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    time

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    times

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    tr///

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    truncate

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    uc

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    ucfirst

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    umask

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    undef

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    unlink

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    unpack

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    unshift

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    untie

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    use

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    utime

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    values

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    vec

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    wait

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    waitpid

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    wantarray

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    warn

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    write

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    y//

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    Chapter 28. The Standard Perl Library
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    Library Science

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    A Tour of the Perl Library
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    Roll Call

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    The Future of the Standard Perl Library

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    Wandering the Stacks

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    Chapter 29. Pragmatic Modules
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    attributes

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    autodie

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    autouse

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    base

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    bigint

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    bignum

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    bigrat

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    blib

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    bytes

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    charnames
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    Custom Character Names

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    Runtime Lookups

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    constant
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    Restrictions on constant

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    deprecate

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    diagnostics

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    encoding

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    feature

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    fields

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    filetest

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    if

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    inc::latest

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    integer

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    less

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    lib

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    locale

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    mro

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    open

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    ops

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    overload

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    overloading

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    parent

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    re

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    sigtrap
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    Signal Handlers

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    Predefined Signal Lists

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    Other Arguments to sigtrap

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    Examples of sigtrap

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    sort

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    strict
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    strict "refs"

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    strict "vars"

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    strict "subs"

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    subs

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    threads

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    utf8

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    vars

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    version

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    vmsish
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    exit

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    hushed

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    status

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    time

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    warnings

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    User-Defined Pragmas

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    Glossary

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    Index of Perl Modules in This Book

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    Index

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