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Index: C

case-insensitive hashes : 13.15. Creating Magic Variables with tie
converting between cases : 1.9. Controlling Case
honoring locale when matching : 6.12. Honoring Locale Settings in Regular Expressions

Carp module : 12.12. Reporting Errors and Warnings Like Built-Ins

carriage returns : (see line breaks; whitespace)

cascade menu entries : 15.14. Creating Menus with Tk

case

converting : 1.9. Controlling Case
honoring locale when matching : 6.12. Honoring Locale Settings in Regular Expressions

cbreak mode : 15.6. Reading from the Keyboard

ceil(�) : 2.3. Rounding Floating-Point Numbers

CGI programming : 19.0. Introduction

chemiserie program (example) : 19.14. Program: chemiserie

cookies : 19.10. Managing Cookies

debugging HTTP exchanges : 19.9. Debugging the Raw HTTP Exchange

errors

500 Server Error : 19.3. Fixing a 500 Server Error
redirecting messages : 19.2. Redirecting Error Messages

HTTP methods

19.0. Introduction
19.1. Writing a CGI Script

improving efficiency of : 19.5. Making CGI Scripts Efficient

multiscreen scripts : 19.12. Writing a Multiscreen CGI Script

redirecting requests : 19.8. Redirecting to a Different Location

saving/mailing HTML forms : 19.13. Saving a Form to a File or Mail Pipe

security and

19.0. Introduction
19.4. Writing a Safe CGI Program
executing user commands : 19.6. Executing Commands Without Shell Escapes

sticky widgets : 19.11. Creating Sticky Widgets

writing scripts : 19.1. Writing a CGI Script

CGI.pm module

19.0. Introduction
19.1. Writing a CGI Script
HTML formatting shortcuts : 19.7. Formatting Lists and Tables with HTML Shortcuts
managing cookies : 19.10. Managing Cookies

CGI::Carp module : 19.2. Redirecting Error Messages

changed web pages, links in : 20.8. Finding Fresh Links

characters

converting ASCII to/from HTML : 20.4. Converting ASCII to HTML
converting ASCII with values : 1.4. Converting Between ASCII Characters and Values
converting case : 1.9. Controlling Case
escaping : 1.13. Escaping Characters
matching letters : 6.2. Matching Letters
multiple-byte, matching : 6.18. Matching Multiple-Byte Characters
parsing command-line arguments : 15.1. Parsing Program Arguments
processing individually : 1.5. Processing a String One Character at a Time
reversing : 1.6. Reversing a String by Word or Character
text color, changing : 15.5. Changing Text Color

checkbutton menu entries : 15.14. Creating Menus with Tk

checkuser program (example) : 15.10. Reading Passwords

chemiserie program (example) : 19.14. Program: chemiserie

chr(�) : 1.4. Converting Between ASCII Characters and Values

circular data structures : 13.13. Coping with Circular Data Structures

circular lists : 4.16. Implementing a Circular List

class attributes

13.0. Introduction
13.4. Managing Class Data

class data

13.0. Introduction
13.4. Managing Class Data
circular data structures : 13.13. Coping with Circular Data Structures

class methods

13.0. Introduction
13.4. Managing Class Data

Class::Struct module : 13.5. Using Classes as Structs

classes : 13.0. Introduction

accessing overridden methods : 13.10. Accessing Overridden Methods

determining subclass membership : 13.8. Determining Subclass Membership

generating methods with AUTOLOAD

13.0. Introduction
13.11. Generating Attribute Methods Using AUTOLOAD

inheritance

13.0. Introduction
13.9. Writing an Inheritable Class
13.12. Solving the Data Inheritance Problem

as structs : 13.5. Using Classes as Structs

cleaning up modules : 12.6. Automating Module Clean-Up

clear command : 15.3. Clearing the Screen

clearerr(�) : 8.5. Trailing a Growing File

clients

bidirectional : 17.10. Writing Bidirectional Clients
FTP : 18.2. Being an FTP Client
TCP : 17.1. Writing a TCP Client
UDP : 17.4. Setting Up a UDP Client

clobbering values : 1.3. Exchanging Values Without Using Temporary Variables

clockdrift program (example) : 17.4. Setting Up a UDP Client

cloning parent objects : 13.6. Cloning Objects

close(�)

7.0. Introduction
7.19. Opening and Closing File Descriptors by Number
file locks and : 7.11. Locking a File

closedir(�) : 9.0. Introduction

closing file descriptors : 7.19. Opening and Closing File Descriptors by Number

closures

10.16. Nesting Subroutines
11.4. Taking References to Functions
12.13. Referring to Packages Indirectly
as objects : 11.7. Using Closures Instead of Objects

cmd3sel program (example) : 16.9. Controlling the Input, Output, and Error of Another Program

cmp(�) : 4.14. Sorting an Array Numerically

code size, library : 14.0. Introduction

color of text, changing : 15.5. Changing Text Color

color(�) (Term::ANSIColor) : 15.5. Changing Text Color

colored(�) (Term::ANSIColor) : 15.5. Changing Text Color

columns

arranging du command output : 5.16. Program: dutree
outputting sorting text in : 4.18. Program: words
parsing data by : 1.1. Accessing Substrings
wrapping paragraphs by : 1.12. Reformatting Paragraphs

comma (,)

in numbers : 2.17. Putting Commas in Numbers
printing lists with commas : 4.2. Printing a List with Commas

comma arrow (=>) operator : 5.0. Introduction

comma-separated values (CSV)

initializing arrays with : 4.1. Specifying a List In Your Program
parsing : 1.15. Parsing Comma-Separated Data
reading records from : 6.7. Reading Records with a Pattern Separator

command entry (menu items) : 15.14. Creating Menus with Tk

command interpreters : 1.13. Escaping Characters

command-line arguments, parsing : 15.1. Parsing Program Arguments

comments

pod documentation for modules : 12.16. Documenting Your Module with Pod
in regular expressins : 6.4. Commenting Regular Expressions

commify(�) (example) : 2.17. Putting Commas in Numbers

commify_series program (example) : 4.2. Printing a List with Commas

Common Log Format standard : 20.12. Parsing a Web Server Log File

comparing

floating-point numbers : 2.2. Comparing Floating-Point Numbers
hashes for keys : 5.11. Finding Common or Different Keys in Two Hashes

comparison (<=>) operator : 4.14. Sorting an Array Numerically

compile-time scoping : 10.13. Saving Global Values

complex numbers : 2.15. Using Complex Numbers

Comprehensive Perl Archive Network : (see CPAN)

compressing tabs : 1.7. Expanding and Compressing Tabs

confess(�) : 12.12. Reporting Errors and Warnings Like Built-Ins

Config module : 16.13. Listing Available Signals

configuration files, reading : 8.16. Reading Configuration Files

Configure event (Tk) : 15.16. Responding to Tk Resize Events

constructors

13.0. Introduction
13.1. Constructing an Object
accessing overridden methods : 13.10. Accessing Overridden Methods
cloning parent objects : 13.6. Cloning Objects

continuation characters, reading data with : 8.1. Reading Lines with Continuation Characters

conventions : Conventions Used in This Book

converting

ASCII characters and values : 1.4. Converting Between ASCII Characters and Values
ASCII to/from HTML : 20.4. Converting ASCII to HTML
binary and decimal numbers : 2.4. Converting Between Binary and Decimal
character case : 1.9. Controlling Case
datetime to/from Epoch seconds : 3.2. Converting DMYHMS to Epoch Seconds
DBM files : 14.3. Converting Between DBM Files
degrees and radians : 2.11. Doing Trigonometry in Degrees, not Radians
numbers and Roman numerals : 2.6. Working with Roman Numerals
octal and hexadecimal numbers : 2.16. Converting Between Octal and Hexadecimal
pod into other languages : 12.16. Documenting Your Module with Pod
shell wildcards for regexp matching : 6.9. Matching Shell Globs as Regular Expressions

cookies : 19.10. Managing Cookies

copy(�) (File::Copy) : 9.3. Copying or Moving a File

copying

data structures : 11.12. Copying Data Structures
directory trees : 9.11. Program: symirror
filehandles : 7.20. Copying Filehandles
files : 9.3. Copying or Moving a File
parent objects (cloning) : 13.6. Cloning Objects
surface vs. deep copies : 11.12. Copying Data Structures

copying and substituting : 6.1. Copying and Substituting Simultaneously

cos(�) : 2.12. Calculating More Trigonometric Functions

countchunks program (example) : 7.7. Writing a Filter

counting lines in files : 8.2. Counting Lines (or Paragraphs or Records) in a File

CPAN : 12.0. Introduction

building and installing modules from : 12.17. Building and Installing a CPAN Module
finding modules, program for : 12.19. Program: Finding Versions and Descriptions of Installed Modules
registering as developer : 12.8. Preparing a Module for Distribution

creation time, file : 9.0. Introduction

croak(�) : 12.12. Reporting Errors and Warnings Like Built-Ins

CSV (comma-separated values)

initializing arrays with : 4.1. Specifying a List In Your Program
parsing : 1.15. Parsing Comma-Separated Data
reading records from : 6.7. Reading Records with a Pattern Separator

ctime field : 9.0. Introduction

Ctrl-C, catching : 16.18. Catching Ctrl-C

Curses module : 15.12. Managing the Screen

curses toolkit : 15.0. Introduction

Cwd module : 12.11. Overriding Built-In Functions

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