Index: C

• %c format : Converting Between ASCII Characters and Values
• C, writing modules in : Using h2xs to Make a Module with C Code
• cacheout( ) : Caching Open Output Filehandles
• caching open filehandles : Caching Open Output Filehandles
• calc_new_date( ) : Adding to or Subtracting from a Date
• calc_new_date_time( ) : Adding to or Subtracting from a Date
• calculating prime numbers : Program: Calculating Prime Factors
• caller( )
• • Determining Current Function Name
  • Determining the Caller's Package
• can( ) (UNIVERSAL) : Calling Methods Indirectly
• capitalization
• • case-insensitive hashes : Creating Magic Variables with tie
  • converting between cases : Controlling Case
  • honoring locale when matching : Honoring Locale Settings in Regular Expressions
• Carp module : Reporting Errors and Warnings Like Built-Ins
• carriage returns : (see line breaks; whitespace)
• cascade menu entries : Creating Menus with Tk
• case
• • converting : Controlling Case
  • honoring locale when matching : Honoring Locale Settings in Regular Expressions
• cbreak mode : Reading from the Keyboard
• ceil( ) : Rounding Floating-Point Numbers
• CGI developing : Introduction
• • chemiserie program (example) : Program: chemiserie
  • cookies : Managing Cookies
  • debugging HTTP exchanges : Debugging the Raw HTTP Exchange
  • errors
  • • 500 Server Error : Fixing a 500 Server Error
    • redirecting messages : Redirecting Error Messages
  • HTTP methods
  • • Introduction
    • Writing a CGI Script
  • improving efficiency of : Making CGI Scripts Efficient
  • multiscreen scripts : Writing a Multiscreen CGI Script
  • redirecting requests : Redirecting to a Different Location
  • saving/mailing HTML forms : Saving a Form to a File or Mail Pipe
  • security and
  • • Introduction
    • Writing a Safe CGI Program
    • executing user commands : Executing Commands Without Shell Escapes
  • sticky widgets : Creating Sticky Widgets
  • writing scripts : Writing a CGI Script
• CGI.pm module
• • Introduction
  • Writing a CGI Script
  • HTML formatting shortcuts : Formatting Lists and Tables with HTML Shortcuts
  • managing cookies : Managing Cookies
• CGI::Carp module : Redirecting Error Messages
• changed web pages, links in : Finding Fresh Links
• characters
• • converting ASCII to/from HTML : Converting ASCII to HTML
  • converting ASCII with values : Converting Between ASCII Characters and Values
  • converting case : Controlling Case
  • escaping : Escaping Characters
  • matching letters : Matching Letters
  • multiple-byte, matching : Matching Multiple-Byte Characters
  • parsing command-line arguments : Parsing Program Arguments
  • processing individually : Processing a String One Character at a Time
  • reversing : Reversing a String by Word or Character
  • text color, changing : Changing Text Color
• checkbutton menu entries : Creating Menus with Tk
• checkuser program (example) : Reading Passwords
• chemiserie program (example) : Program: chemiserie
• chr( ) : Converting Between ASCII Characters and Values
• circular data structures : Coping with Circular Data Structures
• circular lists : Implementing a Circular List
• class attributes
• • Introduction
  • Managing Class Data
• class data
• • Introduction
  • Managing Class Data
  • circular data structures : Coping with Circular Data Structures
• class methods
• • Introduction
  • Managing Class Data
• Class::Struct module : Using Classes as Structs
• classes : Introduction
• • accessing overridden methods : Accessing Overridden Methods
  • determining subclass membership : Determining Subclass Membership
  • generating methods with AUTOLOAD
  • • Introduction
    • Generating Attribute Methods Using AUTOLOAD
  • inheritance
  • • Introduction
    • Writing an Inheritable Class
    • Solving the Data Inheritance Problem
  • as structs : Using Classes as Structs
• cleaning up modules : Automating Module Clean-Up
• clear command : Clearing the Screen
• clearerr( ) : Trailing a Growing File
• clients
• • bidirectional : Writing Bidirectional Clients
  • FTP : Being an FTP Client
  • TCP : Writing a TCP Client
  • UDP : Setting Up a UDP Client
• clobbering values : Exchanging Values Without Using Temporary Variables
• clockdrift program (example) : Setting Up a UDP Client
• cloning parent objects : Cloning Objects
• close( )
• • Introduction
  • Opening and Closing File Descriptors by Number
  • file locks and : Locking a File
• closedir( ) : Introduction
• closing file descriptors : Opening and Closing File Descriptors by Number
• closures
• • Nesting Subroutines
  • Taking References to Functions
  • Referring to Packages Indirectly
  • as objects : Using Closures Instead of Objects
• cmd3sel program (example) : Controlling the Input, Output, and Error of Another Program
• cmp( ) : Sorting an Array Numerically
• code size, library : Introduction
• color of text, changing : Changing Text Color
• color( ) (Term::ANSIColor) : Changing Text Color
• colored( ) (Term::ANSIColor) : Changing Text Color
• columns
• • arranging du command output : Program: dutree
  • outputting sorting text in : Program: words
  • parsing data by : Accessing Substrings
  • wrapping paragraphs by : Reformatting Paragraphs
• comma (,)
• • in numbers : Putting Commas in Numbers
  • printing lists with commas : Printing a List with Commas
• comma arrow (=>) operator : Introduction
• comma-separated values (CSV)
• • initializing arrays with : Specifying a List In Your Program
  • parsing : Parsing Comma-Separated Data
  • reading records from : Reading Records with a Pattern Separator
• command entry (menu items) : Creating Menus with Tk
• command interpreters : Escaping Characters
• command-line arguments, parsing : Parsing Program Arguments
• comments
• • pod documentation for modules : Documenting Your Module with Pod
  • in regular expressins : Commenting Regular Expressions
• commify( ) (example) : Putting Commas in Numbers
• commify_series program (example) : Printing a List with Commas
• Common Log Format standard : Parsing a Web Server Log File
• comparing
• • floating-point numbers : Comparing Floating-Point Numbers
  • hashes for keys : Finding Common or Different Keys in Two Hashes
• comparison (<=>) operator : Sorting an Array Numerically
• compile-time scoping : Saving Global Values
• complex numbers : Using Complex Numbers
• Comprehensive Perl Archive Network : (see CPAN)
• compressing tabs : Expanding and Compressing Tabs
• confess( ) : Reporting Errors and Warnings Like Built-Ins
• Config module : Listing Available Signals
• configuration files, reading : Reading Configuration Files
• Configure event (Tk) : Responding to Tk Resize Events
• constructors
• • Introduction
  • Constructing an Object
  • accessing overridden methods : Accessing Overridden Methods
  • cloning parent objects : Cloning Objects
• continuation characters, reading data with : Reading Lines with Continuation Characters
• conventions : Conventions Used in this tutorial
• converting
• • ASCII characters and values : Converting Between ASCII Characters and Values
  • ASCII to/from HTML : Converting ASCII to HTML
  • binary and decimal numbers : Converting Between Binary and Decimal
  • character case : Controlling Case
  • datetime to/from Epoch seconds : Converting DMYHMS to Epoch Seconds
  • DBM files : Converting Between DBM Files
  • degrees and radians : Doing Trigonometry in Degrees, not Radians
  • numbers and Roman numerals : Working with Roman Numerals
  • octal and hexadecimal numbers : Converting Between Octal and Hexadecimal
  • pod into other languages : Documenting Your Module with Pod
  • shell wildcards for regexp matching : Matching Shell Globs as Regular Expressions
• cookies : Managing Cookies
• copy( ) (File::Copy) : Copying or Moving a File
• copying
• • data structures : Copying Data Structures
  • directory trees : Program: symirror
  • filehandles : Copying Filehandles
  • files : Copying or Moving a File
  • parent objects (cloning) : Cloning Objects
  • surface vs. deep copies : Copying Data Structures
• copying and substituting : Copying and Substituting Simultaneously
• cos( ) : Calculating More Trigonometric Functions
• countchunks program (example) : Writing a Filter
• counting lines in files : Counting Lines (or Paragraphs or Records) in a File
• CPAN : Introduction
• • building and installing modules from : Building and Installing a CPAN Module
  • finding modules, program for : Program: Finding Versions and Descriptions of Installed Modules
  • registering as developer : Preparing a Module for Distribution
• creation time, file : Introduction
• croak( ) : Reporting Errors and Warnings Like Built-Ins
• CSV (comma-separated values)
• • initializing arrays with : Specifying a List In Your Program
  • parsing : Parsing Comma-Separated Data
  • reading records from : Reading Records with a Pattern Separator
• ctime field : Introduction
• Ctrl-C, catching : Catching Ctrl-C
• Curses module : Managing the Screen
• curses toolkit : Introduction
• Cwd module : Overriding Built-In Functions