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Learning Perl [Paperback]

Tom Phoenix , Randal L. Schwartz
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Table of Contents

Preface; Typographical Conventions; How to Contact Us; Code Examples; History of This Book; Acknowledgments; Chapter 1: Introduction; 1.1 Questions and Answers; 1.2 What Does "Perl" Stand For?; 1.3 How Can I Get Perl?; 1.4 How Do I Make a Perl Program?; 1.5 A Whirlwind Tour of Perl; 1.6 Exercises; Chapter 2: Scalar Data; 2.1 What Is Scalar Data?; 2.2 Numbers; 2.3 Strings; 2.4 Perl's Built-in Warnings; 2.5 Scalar Variables; 2.6 Output with print; 2.7 The if Control Structure; 2.8 Getting User Input; 2.9 The chomp Operator; 2.10 The while Control Structure; 2.11 The undef Value; 2.12 The defined Function; 2.13 Exercises; Chapter 3: Lists and Arrays; 3.1 Accessing Elements of an Array; 3.2 Special Array Indices; 3.3 List Literals; 3.4 List Assignment; 3.5 Interpolating Arrays into Strings; 3.6 The foreach Control Structure; 3.7 Perl's Favorite Default: $_; 3.8 Scalar and List Context; 3.9 in List Context; 3.10 Exercises; Chapter 4: Subroutines; 4.1 System and User Functions; 4.2 Defining a Subroutine; 4.3 Invoking a Subroutine; 4.4 Return Values; 4.5 Arguments; 4.6 Private Variables in Subroutines; 4.7 The local Operator; 4.8 Variable-length Parameter Lists; 4.9 Notes on Lexical (my) Variables; 4.10 The use strict Pragma; 4.11 The return Operator; 4.12 Exercises; Chapter 5: Hashes; 5.1 What Is a Hash?; 5.2 Hash Element Access; 5.3 Hash Functions; 5.4 Typical Use of a Hash; 5.5 Exercises; Chapter 6: I/O Basics; 6.1 Input from Standard Input; 6.2 Input from the Diamond Operator; 6.3 The Invocation Arguments; 6.4 Output to Standard Output; 6.5 Formatted Output with printf; 6.6 Exercises; Chapter 7: Concepts of Regular Expressions; 7.1 What Are Regular Expressions?; 7.2 Using Simple Patterns; 7.3 A Pattern Test Program; 7.4 Exercises; Chapter 8: More About Regular Expressions; 8.1 Character Classes; 8.2 General Quantifiers; 8.3 Anchors; 8.4 Memory Parentheses; 8.5 Precedence; 8.6 Exercises; Chapter 9: Using Regular Expressions; 9.1 Matches with m//; 9.2 Option Modifiers; 9.3 The Binding Operator, =~; 9.4 Interpolating into Patterns; 9.5 The Match Variables; 9.6 Substitutions with s///; 9.7 The split Operator; 9.8 The join Function; 9.9 Exercises; Chapter 10: More Control Structures; 10.1 The unless Control Structure; 10.2 The until Control Structure; 10.3 Expression Modifiers; 10.4 The Naked Block Control Structure; 10.5 The elsif Clause; 10.6 Autoincrement and Autodecrement; 10.7 The for Control Structure; 10.8 Loop Controls; 10.9 Logical Operators; 10.10 Exercise; Chapter 11: Filehandles and File Tests; 11.1 What Is a Filehandle?; 11.2 Opening a Filehandle; 11.3 Fatal Errors with die; 11.4 Using Filehandles; 11.5 Reopening a Standard Filehandle; 11.6 File Tests; 11.7 Exercises; Chapter 12: Directory Operations; 12.1 Moving Around the Directory Tree; 12.2 Globbing; 12.3 An Alternate Syntax for Globbing; 12.4 Directory Handles; 12.5 Recursive Directory Listing; 12.6 Exercises; Chapter 13: Manipulating Files and Directories; 13.1 Removing Files; 13.2 Renaming Files; 13.3 Links and Files; 13.4 Making and Removing Directories; 13.5 Modifying Permissions; 13.6 Changing Ownership; 13.7 Changing Timestamps; 13.8 Using Simple Modules; 13.9 Exercises; Chapter 14: Process Management; 14.1 The system Function; 14.2 The exec Function; 14.3 The Environment Variables; 14.4 Using Backquotes to Capture Output; 14.5 Processes as Filehandles; 14.6 Getting Down and Dirty with Fork; 14.7 Sending and Receiving Signals; 14.8 Exercises; Chapter 15: Strings and Sorting; 15.1 Finding a Substring with index; 15.2 Manipulating a Substring with substr; 15.3 Formatting Data with sprintf; 15.4 Advanced Sorting; 15.5 Exercises; Chapter 16: Simple Databases; 16.1 DBM Files and DBM Hashes; 16.2 Manipulating Data with pack and unpack; 16.3 Fixed-length Random-access Databases; 16.4 Variable-length (Text) Databases; 16.5 Exercises; Chapter 17: Some Advanced Perl Techniques; 17.1 Trapping Errors with eval; 17.2 Picking Items from a List with grep; 17.3 Transforming Items from a List with map; 17.4 Unquoted Hash Keys; 17.5 More Powerful Regular Expressions; 17.6 Slices; 17.7 Exercise; Appendix A: Exercise Answers; A.1 Answers to Chapter 2 Exercises; A.2 Answers to Chapter 3 Exercises; A.3 Answers to Chapter 4 Exercises; A.4 Answers to Chapter 5 Exercises; A.5 Answers to Chapter 6 Exercises; A.6 Answers to Chapter 7 Exercises; A.7 Answers to Chapter 8 Exercises; A.8 Answers to Chapter 9 Exercises; A.9 Answer to Chapter 10 Exercise; A.10 Answers to Chapter 11 Exercises; A.11 Answers to Chapter 12 Exercises; A.12 Answers to Chapter 13 Exercises; A.13 Answers to Chapter 14 Exercises; A.14 Answers to Chapter 15 Exercises; A.15 Answers to Chapter 16 Exercises; A.16 Answer to Chapter 17 Exercises; Appendix B: Beyond the Llama; B.1 Further Documentation; B.2 Regular expressions; B.3 Packages; B.4 Extending Perl's Functionality; B.5 Some Important Modules; B.6 Pragmas; B.7 Databases; B.8 Other Operators and Functions; B.9 Mathematics; B.10 Lists and Arrays; B.11 Bits and Pieces; B.12 Formats; B.13 Networking and IPC; B.14 Security; B.15 Debugging; B.16 The Common Gateway Interface (CGI); B.17 Command-Line Options; B.18 Built in Variables; B.19 Syntax Extensions; B.20 References; B.21 Tied Variables; B.22 Operator Overloading; B.23 Dynamic Loading; B.24 Embedding; B.25 Converting Other Languages to Perl; B.26 Converting find Command Lines to Perl; B.27 Command-line Options in Your Programs; B.28 Embedded Documentation; B.29 More Ways to Open Filehandles; B.30 Locales and Unicode; B.31 Threads and Forking; B.32 Graphical User Interfaces (GUIs); B.33 And More...; Colophon;

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