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Preface 
1. Best Practices

      Three Goals 

      This Book 

      Rehabiting 
2. Code Layout

      Bracketing 

      Keywords 

      Subroutines and Variables 

      Builtins 

      Keys and Indices 

      Operators 

      Semicolons 

      Commas 

      Line Lengths 

      Indentation 

      Tabs 

      Blocks 

      Chunking 

      Elses 

      Vertical Alignment 

      Breaking Long Lines 

      Non-Terminal Expressions 

      Breaking by Precedence 

      Assignments 

      Ternaries 

      Lists 

      Automated Layout 
3. Naming Conventions

      Identifiers 

      Booleans 

      Reference Variables 

      Arrays and Hashes 

      Underscores 

      Capitalization 

      Abbreviations 

      Ambiguous Abbreviations 

      Ambiguous Names 

      Utility Subroutines 
4. Values and Expressions

      String Delimiters 

      Empty Strings 

      Single-Character Strings 

      Escaped Characters 

      Constants 

      Leading Zeros 

      Long Numbers 

      Multiline Strings 

      Here Documents 

      Heredoc Indentation 

      Heredoc Terminators 

      Heredoc Quoters 

      Barewords 

      Fat Commas 

      Thin Commas 

      Low-Precedence Operators 

      Lists 

      List Membership 
5. Variables

      Lexical Variables 

      Package Variables 

      Localization 

      Initialization 

      Punctuation Variables 

      Localizing Punctuation Variables 

      Match Variables 

      Dollar-Underscore 

      Array Indices 

      Slicing 

      Slice Layout 

      Slice Factoring 
6. Control Structures

      If Blocks 

      Postfix Selectors 

      Other Postfix Modifiers 

      Negative Control Statements 

      C-Style Loops 

      Unnecessary Subscripting 

      Necessary Subscripting 

      Iterator Variables 

      Non-Lexical Loop Iterators 

      List Generation 

      List Selections 

      List Transformation 

      Complex Mappings 

      List Processing Side Effects 

      Multipart Selections 

      Value Switches 

      Tabular Ternaries 

      do-while Loops 

      Linear Coding 

      Distributed Control 

      Redoing 

      Loop Labels 
7. Documentation

      Types of Documentation 

      Boilerplates 

      Extended Boilerplates 

      Location 

      Contiguity 

      Position 

      Technical Documentation 

      Comments 

      Algorithmic Documentation 

      Elucidating Documentation 

      Defensive Documentation 

      Indicative Documentation 

      Discursive Documentation 

      Proofreading 
8. Built-in Functions

      Sorting 

      Reversing Lists 

      Reversing Scalars 

      Fixed-Width Data 

      Separated Data 

      Variable-Width Data 

      String Evaluations 

      Automating Sorts 

      Substrings 

      Hash Values 

      Globbing 

      Sleeping 

      Mapping and Grepping 

      Utilities 
9. Subroutines

      Call Syntax 

      Homonyms 

      Argument Lists 

      Named Arguments 

      Missing Arguments 

      Default Argument Values 

      Scalar Return Values 

      Contextual Return Values 

      Multi-Contextual Return Values 

      Prototypes 

      Implicit Returns 

      Returning Failure 
10. I/O

      Filehandles 

      Indirect Filehandles 

      Localizing Filehandles 

      Opening Cleanly 

      Error Checking 

      Cleanup 

      Input Loops 

      Line-Based Input 

      Simple Slurping 

      Power Slurping 

      Standard Input 

      Printing to Filehandles 

      Simple Prompting 

      Interactivity 

      Power Prompting 

      Progress Indicators 

      Automatic Progress Indicators 

      Autoflushing 
11. References

      Dereferencing 

      Braced References 

      Symbolic References 

      Cyclic References 
12. Regular Expressions

      Extended Formatting 

      Line Boundaries 

      String Boundaries 

      End of String 

      Matching Anything 

      Lazy Flags 

      Brace Delimiters 

      Other Delimiters 

      Metacharacters 

      Named Characters 

      Properties 

      Whitespace 

      Unconstrained Repetitions 

      Capturing Parentheses 

      Captured Values 

      Capture Variables 

      Piecewise Matching 

      Tabular Regexes 

      Constructing Regexes 

      Canned Regexes 

      Alternations 

      Factoring Alternations 

      Backtracking 

      String Comparisons 
13. Error Handling

      Exceptions 

      Builtin Failures 

      Contextual Failure 

      Systemic Failure 

      Recoverable Failure 

      Reporting Failure 

      Error Messages 

      Documenting Errors 

      OO Exceptions 

      Volatile Error Messages 

      Exception Hierarchies 

      Processing Exceptions 

      Exception Classes 

      Unpacking Exceptions 
14. Command-Line Processing

      Command-Line Structure 

      Command-Line Conventions 

      Meta-options 

      In-situ Arguments 

      Command-Line Processing 

      Interface Consistency 

      Interapplication Consistency 
15. Objects

      Using OO 

      Criteria 

      Pseudohashes 

      Restricted Hashes 

      Encapsulation 

      Constructors 

      Cloning 

      Destructors 

      Methods 

      Accessors 

      Lvalue Accessors 

      Indirect Objects 

      Class Interfaces 

      Operator Overloading 

      Coercions 
16. Class Hierarchies

      Inheritance 

      Objects 

      Blessing Objects 

      Constructor Arguments 

      Base Class Initialization 

      Construction and Destruction 

      Automating Class Hierarchies 

      Attribute Demolition 

      Attribute Building 

      Coercions 

      Cumulative Methods 

      Autoloading 
17. Modules

      Interfaces 

      Refactoring 

      Version Numbers 

      Version Requirements 

      Exporting 

      Declarative Exporting 

      Interface Variables 

      Creating Modules 

      The Standard Library 

      CPAN 
18. Testing and Debugging

      Test Cases 

      Modular Testing 

      Test Suites 

      Failure 

      What to Test 

      Debugging and Testing 

      Strictures 

      Warnings 

      Correctness 

      Overriding Strictures 

      The Debugger 

      Manual Debugging 

      Semi-Automatic Debugging 
19. Miscellanea

      Revision Control 

      Other Languages 

      Configuration Files 

      Formats 

      Ties 

      Cleverness 

      Encapsulated Cleverness 

      Benchmarking 

      Memory 

      Caching 

      Memoization 

      Caching for Optimization 

      Profiling 

      Enbugging 
A. Essential Perl Best Practices
B. Perl Best Practices
C. Editor Configurations
D. Recommended Modules and Utilities
E. Bibliography
Index