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# Index: D

\d (digit) character class
  Learning Perl, 7.3.1. Single-Character Patterns
  Perl in a Nutshell, 4.6.4. Character Classes
  Programming Perl, 1.7. Regular Expressions
\D (nondigit) character class : Perl in a Nutshell, 4.6.4. Character Classes
d command (CPAN.pm) : Perl in a Nutshell, Chapter 2, Reference: d
d command (debugger)
  Perl in a Nutshell, Chapter 6, Reference: d
  Programming Perl, 8.1.1. Debugger Commands
D command (debugger)
  Perl in a Nutshell, Chapter 6, Reference: D
  Programming Perl, 8.1.1. Debugger Commands
-d file test operator
  Learning Perl, 10.5. The -x File Tests
  Learning Perl on Win32 Systems, 10.6. The -x File Tests
  Perl in a Nutshell, 4.5.8. File Test Operators
  Programming Perl, 2.5.10. Named Unary and File Test Operators
-d option (perlbug) : Perl in a Nutshell, 6.6. The perlbug Program
/d pattern-match modifier
  Learning Perl, 15.5. Transliteration
  Programming Perl, 2.4.2. Pattern-Matching Operators
-d switch, perl
  Perl in a Nutshell, 3.2. Command-Line Options
  Programming Perl, 6.1.2. Switches
  Programming Perl, 8.1.8. Alternative Debuggers: The Perl Profiler
-D switch, perl
  Advanced Perl Programming, 20.1. Reading the Source
  Perl in a Nutshell, 3.2. Command-Line Options
  Programming Perl, 6.1.2. Switches
daemon() (HTTP::Daemon::ClientConn) : Perl in a Nutshell, Chapter 17, Reference: daemon
daemon servers
  Perl Cookbook, 16.22. Program: sigrand
  Perl Cookbook, 17.15. Making a Daemon Server
dangling else, and impossibility of : Learning Perl, 4.2. The if/unless Statement
dash : (see - (hyphen))
data, insecure : Programming Perl, 6.3.1. Handling Insecure Data
data() (Net::SMTP) : Perl in a Nutshell, Chapter 14, Reference: data
DATA command (SMTP) : Perl in a Nutshell, 14.1.2. The SMTP Protocol and the SMTP Session
Data::Dumper module
  Advanced Perl Programming, 2.5. Pretty-Printing
  Advanced Perl Programming, 10.2.2. Data::Dumper
  Perl Cookbook, 11.11. Printing Data Structures
  Perl in a Nutshell, 8.39. Data::Dumper
DATA filehandle
  Perl in a Nutshell, 4.4.3. Global Special Filehandles
  Programming Perl, 2.9.5. Global Special Filehandles
data relationships
  (see also variables)
  Perl Cookbook, 5.15. Representing Relationships Between Data
data_sources() (DBI) : Perl in a Nutshell, Chapter 12, Reference: data_sources
data structures : (see structures)
__DATA__ token
  Perl Cookbook, 7.6. Storing Files Inside Your Program Text
  Programming Perl, 2.3.2.7. Other literal tokens
  Programming Perl, 2.9.5. Global Special Filehandles
data types : Perl in a Nutshell, 4.2. Data Types and Variables
  built-in : Programming Perl, 2.2. Built-in Data Types
  circular data structures : Perl Cookbook, 13.13. Coping with Circular Data Structures
  classes as structs : Perl Cookbook, 13.5. Using Classes as Structs
  complex data structures : Perl in a Nutshell, 4.8. References and Complex Data Structures
  scalars : (see scalars)
  translation : Advanced Perl Programming, 18.1. Writing an Extension: Overview
  typeglobs : Programming Perl, 2.3.6. Typeglobs and Filehandles
database interface modules : Learning Perl on Win32 Systems, B.2.6. Database Interfaces
database queries : Perl Cookbook, 19.7. Formatting Lists and Tables with HTML Shortcuts
databases
  Learning Perl, 17.4. Fixed-Length Random Access Databases
  Learning Perl, 17.5. Variable-Length (Text) Databases
  Perl in a Nutshell, 12. Databases and Perl
  access : Perl Cookbook, 14.0. Introduction
    converting between DBM files : Perl Cookbook, 14.3. Converting Between DBM Files
    emptying DBM files : Perl Cookbook, 14.2. Emptying a DBM File
    ggh program : Perl Cookbook, 14.11. Program: ggh - Grep Netscape Global History
    locking DBM files : Perl Cookbook, 14.5. Locking DBM Files
    making DBM files : Perl Cookbook, 14.1. Making and Using a DBM File
    merging DBM files : Perl Cookbook, 14.4. Merging DBM Files
    persistent data : Perl Cookbook, 14.9. Persistent Data
    sorting large DBM files : Perl Cookbook, 14.6. Sorting Large DBM Files
    SQL queries
      Perl Cookbook, 14.10. Executing an SQL Command Using DBI and DBD
      Perl Cookbook, 19.7. Formatting Lists and Tables with HTML Shortcuts
    storing complex data in DBM files : Perl Cookbook, 14.8. Storing Complex Data in a DBM File
    text files as database arrays : Perl Cookbook, 14.7. Treating a Text File as a Database Array
  database handles (DBI methods) : Perl in a Nutshell, 12.2.3. Database Handles and Statement Handles
  DBDs (database drivers) : Perl in a Nutshell, 12.2.1. Database Drivers (DBDs)
  DBI module : Perl in a Nutshell, 12.2. Design of DBI
  DBM (Database Management) facility : Perl in a Nutshell, 12.1. DBM Databases and DBM Hashes
  fixed-length records in : Learning Perl on Win32 Systems, 17.4. Fixed-Length Random-Access Databases
  generating schema for : Advanced Perl Programming, 17.2.1. Oh, and Can You Do This Too?
  human-readable : Learning Perl on Win32 Systems, 17.5. Variable-Length (Text) Databases
  locking : Programming Perl, 7.2.8.7. Locking databases
  managing with DBM library : Learning Perl, 17.1. DBM Databases and DBM Hashes
  mapping : Advanced Perl Programming, 11.2.4. Multivalued Attributes and Database Mapping
  random-access : Learning Perl on Win32 Systems, 17.4. Fixed-Length Random-Access Databases
dataend() (Net::SMTP) : Perl in a Nutshell, Chapter 14, Reference: dataend
datagram sockets
  Perl Cookbook, 17.0. Introduction
  Perl Cookbook, 17.4. Setting Up a UDP Client
DataReceiveTimeout() (Win32::Internet) : Perl in a Nutshell, Chapter 19, Reference: DataReceiveTimeout
datasend() (Net::SMTP) : Perl in a Nutshell, Chapter 14, Reference: datasend
DataSendTimeout() (Win32::Internet) : Perl in a Nutshell, Chapter 19, Reference: DataSendTimeout
date() (Net::NNTP)
  (see also localtime())
  Perl in a Nutshell, Chapter 15, Reference: date
  examples of
    Learning Perl, A.13. Chapter 14, Process Management
    Learning Perl, 1.4. Basic Concepts
    Learning Perl, 14.1. Using system and exec
date and time
  Perl Cookbook, 3.0. Introduction
  Programming Perl, 3.2.173. time
  alarms : Programming Perl, 3.2.5. alarm
  arithmetic with : Perl Cookbook, 3.4. Adding to or Subtracting from a Date
  converting to/from Epoch seconds : Perl Cookbook, 3.2. Converting DMYHMS to Epoch Seconds
  Date::DateCalc module
    Perl Cookbook, 3.0. Introduction
    Perl Cookbook, 3.4. Adding to or Subtracting from a Date
    Perl Cookbook, 3.5. Difference of Two Dates
    Perl Cookbook, 3.6. Day in a Week/Month/Year or Week Number
  Date::Manip module
    Perl Cookbook, 3.0. Introduction
    Perl Cookbook, 3.7. Parsing Dates and Times from Strings
    Perl Cookbook, 3.8. Printing a Date
    Perl Cookbook, 3.11. Program: hopdelta
  days, calculating : Perl Cookbook, 3.6. Day in a Week/Month/Year or Week Number
  executing, Benchmark for : Programming Perl, 7.2.4. Benchmark - Check and Compare Running Times of Code
  file access/modification
    Perl Cookbook, 9.1. Getting and Setting Timestamps
    Programming Perl, 3.2.159. stat
    Programming Perl, 3.2.186. utime
  file age : Programming Perl, 2.5.10. Named Unary and File Test Operators
  functions for : Perl in a Nutshell, 5.1. Perl Functions by Category
  Greenwich Mean (GMT) : Programming Perl, 3.2.70. gmtime
  high-resolution timers : Perl Cookbook, 3.9. High-Resolution Timers
  hopdelta program : Perl Cookbook, 3.11. Program: hopdelta
  HTTP::Date module : Perl in a Nutshell, 17.3.5. HTTP::Date
  limits on operations : Programming Perl, 6.2.1. Signals
  for local timezone : Programming Perl, 3.2.88. localtime
  local, computing : Programming Perl, 7.2.75. Time::Local - Efficiently Compute Time from Local and GMT Time
  manipulation of
    Learning Perl, 1.5.16. Maintaining a Last-Good-Guess Database
    Learning Perl on Win32 Systems, 1.6.16. Maintaining a Last-Good-Guess Database
  modifying timestamps
    Learning Perl, 13.7. Modifying Timestamps
    Learning Perl on Win32 Systems, 13.5. Modifying Timestamps
  parsing information from strings : Perl Cookbook, 3.7. Parsing Dates and Times from Strings
  printing : Perl Cookbook, 3.8. Printing a Date
  script running : Programming Perl, 2.5.10. Named Unary and File Test Operators
  sleeping : Programming Perl, 3.2.150. sleep
  sleeps : Perl Cookbook, 3.10. Short Sleeps
  sorting mail by (example) : Perl Cookbook, 10.17. Program: Sorting Your Mail
  Time modules
    Time::gmtime module
      Perl Cookbook, 3.0. Introduction
      Perl Cookbook, 3.3. Converting Epoch Seconds to DMYHMS
      Perl in a Nutshell, 8.159. Time::gmtime
    Time::HiRes module : Perl Cookbook, 3.9. High-Resolution Timers
    Time::Local module
      Perl Cookbook, 3.0. Introduction
      Perl Cookbook, 3.2. Converting DMYHMS to Epoch Seconds
      Perl in a Nutshell, 8.160. Time::Local
    Time::localtime module
      Perl Cookbook, 3.0. Introduction
      Perl in a Nutshell, 8.161. Time::localtime
    Time::timelocal : Perl Cookbook, 3.3. Converting Epoch Seconds to DMYHMS
    Time::tm module
      Perl Cookbook, 3.0. Introduction
      Perl in a Nutshell, 8.162. Time::tm
  timing out operations : Perl Cookbook, 16.21. Timing Out an Operation
  today's : Perl Cookbook, 3.1. Finding Today's Date
  UNIX internal format
    Learning Perl, 13.7. Modifying Timestamps
    Learning Perl on Win32 Systems, 13.5. Modifying Timestamps
  years : Perl Cookbook, 3.0. Introduction
date_difference() : Perl Cookbook, 3.5. Difference of Two Dates
date_time_difference() : Perl Cookbook, 3.5. Difference of Two Dates
DateCalc() : Perl Cookbook, 3.11. Program: hopdelta
dates_difference()
  Perl Cookbook, 3.5. Difference of Two Dates
  Perl Cookbook, 3.6. Day in a Week/Month/Year or Week Number
datesort program (example) : Perl Cookbook, 10.17. Program: Sorting Your Mail
day_of_week() : Perl Cookbook, 3.6. Day in a Week/Month/Year or Week Number
days : (see date and time)
daytime server : Learning Perl on Win32 Systems, C.1. A Simple Client
DB package, caller function : Programming Perl, 3.2.10. caller
db2gdbm program (example) : Perl Cookbook, 14.3. Converting Between DBM Files
DB_File module
  Advanced Perl Programming, 10.3.3. Berkeley DB
  Perl Cookbook, 11.14. Transparently Persistent Data Structures
  Perl in a Nutshell, 8.40. DB_File
  Programming Perl, 7.2.1. AnyDBM_File - Provide Framework for Multiple DBMs
  Programming Perl, 7.2.8. DB_File - Access to Berkeley DB
  sorting large DBM files : Perl Cookbook, 14.6. Sorting Large DBM Files
  text files as database arrays : Perl Cookbook, 14.7. Treating a Text File as a Database Array
DB_RECNO access method : Perl Cookbook, 8.8. Reading a Particular Line in a File
DBD module : Perl Cookbook, 14.10. Executing an SQL Command Using DBI and DBD
DBDs (database drivers)
  Perl in a Nutshell, 12. Databases and Perl
  Perl in a Nutshell, 12.2.1. Database Drivers (DBDs)
  DBD::Oracle module : Advanced Perl Programming, 10.4.1. DBI (Database Interface)
DBI_ environment variables : Perl in a Nutshell, 12.4. DBI Environment Variables
DBI module
  Advanced Perl Programming, 11.1. Adaptor: An Introduction
  Perl Cookbook, 14.10. Executing an SQL Command Using DBI and DBD
  Perl Cookbook, 19.7. Formatting Lists and Tables with HTML Shortcuts
  Perl Cookbook, 20.9. Creating HTML Templates
  Perl in a Nutshell, 12. Databases and Perl
  Perl in a Nutshell, 12.2. Design of DBI
  database and statement handles : Perl in a Nutshell, 12.2.3. Database Handles and Statement Handles
  database mapping : Advanced Perl Programming, 11.2.4. Multivalued Attributes and Database Mapping
  environment variables for : Perl in a Nutshell, 12.4. DBI Environment Variables
  implementation of : Advanced Perl Programming, 11.3.2. Adaptor::DBI
  methods of : Perl in a Nutshell, 12.3. DBI Methods
  object uniqueness and : Advanced Perl Programming, 11.2.8. Uniqueness of Objects in Memory
DBI specification : Advanced Perl Programming, 10.4.1. DBI (Database Interface)
dblockdemo program (example) : Perl Cookbook, 14.5. Locking DBM Files
DBM array : Learning Perl, 17.1. DBM Databases and DBM Hashes
dbm close function : Programming Perl, 3.2.23. dbmclose
DBM files
  Learning Perl, 1.5.16. Maintaining a Last-Good-Guess Database
  Learning Perl on Win32 Systems, 1.6.16. Maintaining a Last-Good-Guess Database
  Programming Perl, 3.2.23. dbmclose
  complex data in : Perl Cookbook, 14.8. Storing Complex Data in a DBM File
  converting between : Perl Cookbook, 14.3. Converting Between DBM Files
  deleting from : Programming Perl, 3.2.26. delete
  emptying : Perl Cookbook, 14.2. Emptying a DBM File
  GDBM files
    Perl Cookbook, 14.0. Introduction
    Perl Cookbook, 14.3. Converting Between DBM Files
  locking : Perl Cookbook, 14.5. Locking DBM Files
  making and using : Perl Cookbook, 14.1. Making and Using a DBM File
  merging : Perl Cookbook, 14.4. Merging DBM Files
  NDBM files : Perl Cookbook, 14.0. Introduction
  sorting : Perl Cookbook, 14.6. Sorting Large DBM Files
  tie statement with : Advanced Perl Programming, 9.3. Tying Hashes
DBM libraries : Perl Cookbook, 14.0. Introduction
DBM modules
  Advanced Perl Programming, 10.3.1. DBM
  Learning Perl, 17.1. DBM Databases and DBM Hashes
  Perl in a Nutshell, 12.1. DBM Databases and DBM Hashes
  Programming Perl, 7.2.1. AnyDBM_File - Provide Framework for Multiple DBMs
dbmclose()
  Perl Cookbook, 14.1. Making and Using a DBM File
  Learning Perl, 1.5.17. The Final Programs
  Learning Perl, 17.2. Opening and Closing DBM Hashes
  Perl in a Nutshell, Chapter 5, Reference: dbmclose
  example of : Learning Perl on Win32 Systems, 1.6.17. The Final Programs
dbmopen()
  Perl Cookbook, 14.0. Introduction
  Perl Cookbook, 14.1. Making and Using a DBM File
  Learning Perl, 17.2. Opening and Closing DBM Hashes
  Perl in a Nutshell, Chapter 5, Reference: dbmopen
  Perl in a Nutshell, 12.1. DBM Databases and DBM Hashes
  Programming Perl, 3.2.24. dbmopen
  Programming Perl, 7.2.1. AnyDBM_File - Provide Framework for Multiple DBMs
  examples of
    Learning Perl, A.16. Chapter 17, User Database Manipulation
    Learning Perl, 1.5.16. Maintaining a Last-Good-Guess Database
    Learning Perl, 1.5.17. The Final Programs
    Learning Perl on Win32 Systems, 1.6.17. The Final Programs
    Learning Perl on Win32 Systems, 1.6.16. Maintaining a Last-Good-Guess Database
dbusers program (example) : Perl Cookbook, 14.10. Executing an SQL Command Using DBI and DBD
dclone() : Perl Cookbook, 11.12. Copying Data Structures
deadlocks
  Advanced Perl Programming, 12.2.3. Bidirectional Communications
  Advanced Perl Programming, 13.2. Remote Procedure Calls (RPC)
deallocating memory
  Advanced Perl Programming, 20.5.6.1. Recommended memory allocation and deallocation routines
  Programming Perl, 5.3.9. A Note on Garbage Collection
debug()
  Mail::Folder module : Perl in a Nutshell, Chapter 14, Reference: debug
  Text widget : Perl in a Nutshell, 18.11.2. Text Methods
debug_print() (Mail::Folder) : Perl in a Nutshell, Chapter 14, Reference: debug_print
debugger
  Advanced Perl Programming, 20.1. Reading the Source
  Learning Perl, D.2. The Debugger
  Perl in a Nutshell, 6.1. The Perl Debugger
  commands for : Perl in a Nutshell, 6.2. Debugger Commands
  customizing : Perl in a Nutshell, 6.4. Customizing the Debugger
debugging
  (see also taint checking)
  Perl in a Nutshell, 6. Debugging
  Programming Perl, 6.1.2. Switches
  Programming Perl, 6.3.1. Handling Insecure Data
  Programming Perl, 8.1. The Perl Debugger
  bug reports : Programming Perl, Bug Reports
  CGI scripts
    Perl Cookbook, 19.0. Introduction
    Perl Cookbook, 19.3. Fixing a 500 Server Error
    Perl in a Nutshell, 10.6. Debugging
  checking syntax without running : Perl in a Nutshell, 3.2. Command-Line Options
  controlling from scripts : Programming Perl, 8.1.2. Using the Debugger
  core dumps
    Perl in a Nutshell, 3.2. Command-Line Options
    Programming Perl, 3.2.29. dump
    Programming Perl, 6.1.2. Switches
  customizing : Programming Perl, 8.1.3. Debugger Customization
  -d, -D options (perl)
    Advanced Perl Programming, 20.1. Reading the Source
    Perl in a Nutshell, 3.2. Command-Line Options
    Perl in a Nutshell, 6.1. The Perl Debugger
    Perl in a Nutshell, 6.5. The Perl Profiler
    Programming Perl, 6.1.2. Switches
    Programming Perl, 8.1.8. Alternative Debuggers: The Perl Profiler
  HTTP exchanges : Perl Cookbook, 19.9. Debugging the Raw HTTP Exchange
  Perl profiler (DProf) : Perl in a Nutshell, 6.5. The Perl Profiler
  perlbug program : Perl in a Nutshell, 6.6. The perlbug Program
  UNIX security bugs : Programming Perl, 6.3.1.3. Security bugs
$DEBUGGING ($^D) variable
  Perl in a Nutshell, 4.4.1. Global Special Variables
  Programming Perl, 2.9.3. Global Special Variables
  Programming Perl, 6.1.2. Switches
  Programming Perl, 7.2.13. English - Use English or awk Names for Punctuation Variables
decimal numbers, converting
  Perl Cookbook, 2.4. Converting Between Binary and Decimal
  Perl Cookbook, 2.16. Converting Between Octal and Hexadecimal
decimal points
  Learning Perl, 2.2.2. Float Literals
  Programming Perl, 2.8. Formats
declarations
  Perl in a Nutshell, 4.1. Program Structure
  Programming Perl, 2.6. Statements and Declarations
  formats : Programming Perl, 2.8. Formats
  global
    Programming Perl, 2.6.7. Global Declarations
    Programming Perl, 7.2.76. vars - Predeclare Global Variable Names
  packages
    Perl in a Nutshell, 7.1. Namespaces and Packages
    Programming Perl, 2.6.8. Scoped Declarations
    Programming Perl, 3.2.106. package
  private vs. local : Perl in a Nutshell, 4.7.4. Private and Local Variables
  subroutines
    Perl in a Nutshell, 4.7. Subroutines
    Programming Perl, 2.6.7. Global Declarations
    Programming Perl, 2.7. Subroutines
    Programming Perl, 3.2.161. sub
    Programming Perl, 7.2.60. subs - Predeclare Subroutine Names
  variables
    Perl in a Nutshell, 4.2.6. Declarations and Scope
    Programming Perl, 2.6. Statements and Declarations
    Programming Perl, 2.6.8. Scoped Declarations
    Programming Perl, 7.2.76. vars - Predeclare Global Variable Names
decryption : (see encryption)
deep binding : Advanced Perl Programming, 4.5.2. Python
deep copies : Perl Cookbook, 11.12. Copying Data Structures
default filehandle
  Learning Perl, 10.4. Using Filehandles
  Learning Perl on Win32 Systems, 10.5. Using Filehandles
default package : Programming Perl, 2.6.8. Scoped Declarations
'DEFAULT' string : Programming Perl, 6.2.1. Signals
default string values : Perl Cookbook, 1.2. Establishing a Default Value
default values, implemented with || operator
  Learning Perl, 1.5.9. Making It a Bit More Modular
  Learning Perl on Win32 Systems, 1.6.9. Making It a Bit More Modular
DEFAULT, as special value for %SIG : Learning Perl, 14.6. Sending and Receiving Signals
default_port() (URI::URL) : Perl in a Nutshell, Chapter 17, Reference: default_port
defaults() (CGI.pm) : Perl in a Nutshell, Chapter 10, Reference: defaults
defensive programming : Learning Perl, 15.4. Advanced Sorting
defined operator
  Perl Cookbook, 1.2. Establishing a Default Value
  Perl in a Nutshell, Chapter 5, Reference: defined
  Programming Perl, 3.2.25. defined
  Programming Perl, 5.4.3. Tying Hashes
definedness
  Perl Cookbook, 1.0. Introduction
  Perl Cookbook, 1.2. Establishing a Default Value
defining formats : Learning Perl, 11.2. Defining a Format
deg2rad() (example) : Perl Cookbook, 2.11. Doing Trigonometry in Degrees, not Radians
degrees vs. radians : Perl Cookbook, 2.11. Doing Trigonometry in Degrees, not Radians
deiconify() (Frame widget) : Perl in a Nutshell, 18.18.1. Toplevel Methods
DEL character, completion and : Programming Perl, 7.2.65. Term::Complete - Word Completion Module
del_group() (News::Newsrc) : Perl in a Nutshell, Chapter 15, Reference: del_group
delay() (LWP::RobotUA) : Perl in a Nutshell, Chapter 17, Reference: delay
delaying module loading : Perl Cookbook, 12.3. Delaying use Until Run Time
delegation
  Advanced Perl Programming, 8.2. Delegation
  Programming Perl, 5.5.11. Delegation (the "Passes-the-Buck-to" Relationship)
delete()
  Perl Cookbook, 5.3. Deleting from a Hash
  Learning Perl, 5.4.4. The delete Function
  Learning Perl, 17.3. Using a DBM Hash
  Learning Perl on Win32 Systems, 5.4.4. The delete Function
  Learning Perl on Win32 Systems, 17.3. Using a DBM Hash
  Perl in a Nutshell, Chapter 5, Reference: delete
  Programming Perl, 3.2.26. delete
  Canvas widget : Perl in a Nutshell, 18.12.3. Canvas Methods
  CGI.pm module : Perl in a Nutshell, Chapter 10, Reference: delete
  Entry widget : Perl in a Nutshell, 18.8.2. Entry Methods
  HTML::Parser module : Perl in a Nutshell, Chapter 17, Reference: delete
  Listbox widget : Perl in a Nutshell, 18.10.2. Listbox Methods
  Mail::Send module : Perl in a Nutshell, Chapter 14, Reference: delete
  Menu widget : Perl in a Nutshell, 18.15.2. Menu Methods
  multiple hash key values : Perl Cookbook, 5.7. Hashes with Multiple Values Per Key
  Net::FTP module : Perl in a Nutshell, Chapter 16, Reference: delete
  Net::POP3 module : Perl in a Nutshell, Chapter 14, Reference: delete
  Text widget : Perl in a Nutshell, 18.11.2. Text Methods
  Tie::IxHash module and : Perl Cookbook, 5.6. Retrieving from a Hash in Insertion Order
Delete()
  Mail::POP3Client module
    Perl in a Nutshell, Chapter 14, Reference: Delete
    Perl in a Nutshell, 14.2.8.4. Deleting and undeleting messages
  Win32::Internet module : Perl in a Nutshell, Chapter 19, Reference: Delete
delete_all() (CGI.pm) : Perl in a Nutshell, Chapter 10, Reference: delete_all
Delete as interrupt signal : Learning Perl, 14.6. Sending and Receiving Signals
delete_content() (HTML::Parser) : Perl in a Nutshell, Chapter 17, Reference: delete_content
delete_label() (Mail::Folder) : Perl in a Nutshell, Chapter 14, Reference: delete_label
delete_message() (Mail::Folder) : Perl in a Nutshell, Chapter 14, Reference: delete_message
DELETE method : Programming Perl, 5.4.3. Tying Hashes
delete()
DeleteKey() (Win32::Registry)
  Learning Perl on Win32 Systems, 16.6.1. More Registry Operations
  Perl in a Nutshell, Chapter 19, Reference: DeleteKey
DeleteValue() (Win32::Registry) : Perl in a Nutshell, Chapter 19, Reference: DeleteValue
deleting
  array elements
    Programming Perl, 3.2.143. shift
    Programming Perl, 3.2.154. splice
  breakpoints : Programming Perl, 8.1.1. Debugger Commands
  characters
    Learning Perl, 15.5. Transliteration
    Programming Perl, 3.2.13. chomp
  clearing the screen : Perl Cookbook, 15.3. Clearing the Screen
  directories
    Programming Perl, 3.2.129. rmdir
    Programming Perl, 3.2.181. unlink
    Programming Perl, 7.2.31. File::Path - Create or Remove a Series of Directories
  directories and their contents : Perl Cookbook, 9.8. Removing a Directory and Its Contents
  DOS shell window : Perl Cookbook, 15.17. Removing the DOS Shell Window with Windows Perl/Tk
  emptying DBM files : Perl Cookbook, 14.2. Emptying a DBM File
  files
    Perl Cookbook, 9.2. Deleting a File
    Programming Perl, 3.2.181. unlink
  hash elements
    Perl Cookbook, 5.3. Deleting from a Hash
    Programming Perl, 3.2.26. delete
  HTML tags from strings : Perl Cookbook, 20.6. Extracting or Removing HTML Tags
  last line of files : Perl Cookbook, 8.10. Removing the Last Line of a File
  Registry keys : Learning Perl on Win32 Systems, 16.6.1. More Registry Operations
  selected subroutine return values : Perl Cookbook, 10.8. Skipping Selected Return Values
  whitespace at string ends : Perl Cookbook, 1.14. Trimming Blanks from the Ends of a String
delimiters, for tr : Learning Perl, 15.5. Transliteration
delta() (Scrollbar) : Perl in a Nutshell, 18.9.1. Scrollbar Methods
denial of resource attacks : Advanced Perl Programming, 20.2.2.3. Security features
Deparse backend (Perl compiler) : Perl in a Nutshell, 3.4. The Perl Compiler
dequote() : Perl Cookbook, 1.11. Indenting Here Documents
dereferencing
  (see
  (see also references)
  Advanced Perl Programming, 1.1.2. Dereferencing
  Perl in a Nutshell, 4.8.2. Dereferencing
  Perl in a Nutshell, 7.4. Object Syntax
  Programming Perl, 4.1. What Is a Reference?
  Programming Perl, 4.3.1. Using a Variable as a Variable Name
  Programming Perl, 4.3.3. Using the Arrow Operator
  Programming Perl, 4.6.5. Common Mistakes
  automatic : Advanced Perl Programming, 1.1.8. No Automatic Dereferencing
  multiple levels of indirection : Advanced Perl Programming, 1.2.4. Dereferencing Multiple Levels of Indirection
  operator for : (see - (hyphen), -> (arrow) operator)
  subroutine references : Advanced Perl Programming, 4.1.3. Dereferencing Subroutine References
derived classes
  Perl Cookbook, 13.0. Introduction
  Programming Perl, 5.3.4. A Class Is Simply a Package
  Programming Perl, 5.5.1. Object-Oriented Scaling Tips
deselect()
  Checkbutton widget : Perl in a Nutshell, 18.5.1. Checkbutton Methods
  Radiobutton widget : Perl in a Nutshell, 18.6.1. Radiobutton Methods
DESTROY function
  Advanced Perl Programming, 7.2.7. Object Destruction
  Advanced Perl Programming, 9.1. Tying Scalars
  Perl in a Nutshell, 7.3. Object-Oriented Perl
  Programming Perl, 5.4.1. Tying Scalars
  Programming Perl, 5.4.2. Tying Arrays
  Programming Perl, 5.4.3. Tying Hashes
destroying
  modules/packages : Advanced Perl Programming, 6.3. Package Initialization and Destruction
  objects : Advanced Perl Programming, 7.2.7. Object Destruction
destructors
  Perl Cookbook, 13.0. Introduction
  Perl Cookbook, 13.2. Destroying an Object
  Programming Perl, 5.3.7. Destructors
detecting tainted data : Programming Perl, 6.3.1.1. Detecting and laundering tainted data
deterministic finite automata : Perl Cookbook, 6.0. Introduction
$dev file statistic : Programming Perl, 3.2.159. stat
Devel modules
  Devel::Dump module : Advanced Perl Programming, 20.3.2.1. Inside AVs
  Devel::Peek module
    Advanced Perl Programming, 20.1. Reading the Source
    Advanced Perl Programming, 20.3.1.2. Inside SVs
  Devel::RegExp module : Advanced Perl Programming, 20.1. Reading the Source
  Devel::SelfStubber module
    Perl in a Nutshell, 8.41. Devel::SelfStubber
    Programming Perl, 7.2.9. Devel::SelfStubber - Generate Stubs for a SelfLoading Module
  Devel::Symdump module : Advanced Perl Programming, 20.1. Reading the Source
DFA (deterministic finite automata) : Perl Cookbook, 6.0. Introduction
diagnostic messages
  (see error messages)
  (see warning messages)
diagnostics module
  Perl in a Nutshell, 8.42. diagnostics
  Programming Perl, 7.2.10. diagnostics - Force Verbose Warning Diagnostics
dialog boxes with Tk toolkit : Perl Cookbook, 15.15. Creating Dialog Boxes with Tk
DialogBox widget (Tk) : Perl Cookbook, 15.15. Creating Dialog Boxes with Tk
diamond operator (<>) : (see < > (angle brackets), <...> (angle, diamond, line-input) operator)
Dict module : Programming Perl, 7.2.53. Search::Dict - Search for Key in Dictionary File
dictionary file : Programming Perl, 7.2.53. Search::Dict - Search for Key in Dictionary File
die()
  Advanced Perl Programming, B.7. Exception Handling
  Advanced Perl Programming, 5.2. The Block Form: Exception Handling
  Perl Cookbook, 10.12. Handling Exceptions
  Learning Perl, 1.5.13. Many Secret Word Files in the Current Directory
  Learning Perl, 10.3. A Slight Diversion: die
  Learning Perl on Win32 Systems, 1.6.13. Many Secret Word Files in the Current Directory
  Learning Perl on Win32 Systems, 10.4. A Slight Diversion: die
  Perl in a Nutshell, Chapter 5, Reference: die
  Perl in a Nutshell, 4.9. Filehandles
  Programming Perl, 3.2.27. die
  examples of
    Learning Perl, A.11. Chapter 12, Directory Access
    Learning Perl, 13.3.2. Creating Hard and Soft Links with Perl
  exit function versus : Programming Perl, 3.2.35. exit
  time-outs and : Advanced Perl Programming, 5.6. Using Eval for Time-Outs
__DIE__ token
  Perl Cookbook, 16.15. Installing a Signal Handler
  Programming Perl, 2.9.4. Global Special Arrays
differences of lists : Perl Cookbook, 4.7. Finding Elements in One Array but Not Another
digits : Programming Perl, 1.7. Regular Expressions
  backslashed : Programming Perl, 2.4.1.2. The rules of regular expression matching
  in names : Programming Perl, 2.3.1. Variables
-digits option (Scale) : Perl in a Nutshell, 18.13. The Scale Widget
dir() (Net::FTP) : Perl in a Nutshell, Chapter 16, Reference: dir
directories : Perl Cookbook, 9.0. Introduction
  changing working : Programming Perl, 3.2.11. chdir
  closing : Programming Perl, 3.2.19. closedir
  copying or moving files : Perl Cookbook, 9.3. Copying or Moving a File
  creating
    Programming Perl, 3.2.92. mkdir
    Programming Perl, 7.2.31. File::Path - Create or Remove a Series of Directories
  deleting
    Perl Cookbook, 9.8. Removing a Directory and Its Contents
    Programming Perl, 3.2.129. rmdir
    Programming Perl, 3.2.181. unlink
    Programming Perl, 7.2.31. File::Path - Create or Remove a Series of Directories
  deleting files in : Perl Cookbook, 9.2. Deleting a File
  for email messages : Perl in a Nutshell, 14.2.3. Handle Folders with Mail::Folder
  file-related functions : Perl in a Nutshell, 5.1. Perl Functions by Category
  functions for : Perl in a Nutshell, 5.1. Perl Functions by Category
  getting pathname of : Programming Perl, 7.2.7. Cwd - Get Pathname of Current Working Directory
  of modules : Perl Cookbook, 12.7. Keeping Your Own Module Directory
  multiple names for same file : Perl Cookbook, 9.4. Recognizing Two Names for the Same File
  opendir function : Programming Perl, 3.2.103. opendir
  parsing filenames : Perl Cookbook, 9.10. Splitting a Filename into Its Component Parts
  prepending to @INC : Programming Perl, 6.1.2. Switches
  processing all files in
    Perl Cookbook, 9.5. Processing All Files in a Directory
    Perl Cookbook, 9.7. Processing All Files in a Directory Recursively
  reading entries from : Programming Perl, 3.2.117. readdir
  recursively duplicating : Perl Cookbook, 9.11. Program: symirror
  renaming files
    Perl Cookbook, 9.9. Renaming Files
    Learning Perl, 13.2. Renaming a File
  rewinddir function : Programming Perl, 3.2.127. rewinddir
  root, redefining : Programming Perl, 3.2.17. chroot
  seekdir function
    Learning Perl on Win32 Systems, 13.2. Renaming a File
    Programming Perl, 3.2.133. seekdir
  sorting contents of
    Perl Cookbook, 9.0. Introduction
    Perl Cookbook, 9.12. Program: lst
  timestamps : Perl Cookbook, 9.1. Getting and Setting Timestamps
directory handles
  (see also filehandles)
  Advanced Perl Programming, 3.4. Filehandles, Directory Handles, and Formats
  Perl Cookbook, 9.5. Processing All Files in a Directory
  Learning Perl, 12.3. Directory Handles
  creating : Learning Perl on Win32 Systems, 12.4. Opening and Closing a Directory Handle
  modules/packages and : Advanced Perl Programming, 6.1. Basic Package
DirHandle module
  Advanced Perl Programming, 3.4. Filehandles, Directory Handles, and Formats
  Perl in a Nutshell, 8.43. DirHandle
  Programming Perl, 7.2.11. DirHandle - Supply Object Methods for Directory Handles
dirname()
  Perl Cookbook, 9.10. Splitting a Filename into Its Component Parts
  Programming Perl, 7.2.27. File::Basename - Parse File Specifications
disablecache() routine : Programming Perl, 7.2.4. Benchmark - Check and Compare Running Times of Code
-disabledforeground option (widgets) : Perl in a Nutshell, 18.3. Common Widget Configuration Options
disconnect() (DBI) : Perl in a Nutshell, Chapter 12, Reference: disconnect
disk usage, library : Perl Cookbook, 14.0. Introduction
dispatch tables : Advanced Perl Programming, 4.2.1. Dispatch Table
Display() (Win32::Console) : Perl in a Nutshell, Chapter 19, Reference: Display
distribution, Perl
  Programming Perl, 8.5. Distribution and Installation
  Programming Perl, The Perl Distribution
distributions() (Net::NNTP) : Perl in a Nutshell, Chapter 15, Reference: distributions
divide-by-zero error, trapping : Advanced Perl Programming, 5.2. The Block Form: Exception Handling
division operators
  (see also multiplication operators)
  Learning Perl, 2.4.1. Operators for Numbers
  Perl in a Nutshell, 4.5.3. Arithmetic Operators
@dl_ and dl_ variables : Programming Perl, 7.2.12.1. Internal interface summary
dlineinfo() (Text widget) : Perl in a Nutshell, 18.11.2. Text Methods
DMYHMS values : (see date and time)
DNS lookups : Perl Cookbook, 18.1. Simple DNS Lookups
do()
  Perl Cookbook, 8.16. Reading Configuration Files
  Perl in a Nutshell, Chapter 5, Reference: do
  DBI module : Perl in a Nutshell, Chapter 12, Reference: do
do loops
  Perl in a Nutshell, 4.3.1.4. Modifiers
  Programming Perl, 2.6.1. Simple Statements
  Programming Perl, 3.2.28. do
  Programming Perl, 8.2.1. Universal Blunders
document object (PerlScript) : Perl in a Nutshell, 20.1. Client-Side PerlScript
DOCUMENT_ROOT variable : Perl in a Nutshell, 9.4. CGI Environment Variables
documentation
  Learning Perl on Win32 Systems, 1.5.1. Documentation
  Perl in a Nutshell, 2.5. Documentation
  books on Perl : Programming Perl, Other Books
  bug reports : Programming Perl, Bug Reports
  C library functions : Programming Perl, 3. Functions
  conventions : Perl Cookbook, Conventions Used in This Book
  FAQ on Perl : Programming Perl, Frequently Asked Questions List
  Javadoc format : Advanced Perl Programming, 17.1. On Code Generation
  Perl manpages : Programming Perl, Perl Manpages
  POD format
    Advanced Perl Programming, 17.1. On Code Generation
    Perl in a Nutshell, 4.11. Pod
    Perl in a Nutshell, 4.11.3. Pod Utilities
dollar sign : (see $ (dollar sign))
domain() (Net::SMTP) : Perl in a Nutshell, Chapter 14, Reference: domain
Domain property (response cookies) : Perl in a Nutshell, 20.2.2.1. Setting cookies
DomainName module : Learning Perl on Win32 Systems, B.4. Win32 Extensions
domains
  getting information on : Perl Cookbook, 18.8. Using Whois to Retrieve Information from the InterNIC
  for sockets : Perl Cookbook, 17.0. Introduction
Dominus, Mark-Jason : Perl Cookbook, 4.19. Program: permute
DOS shell window, removing : Perl Cookbook, 15.17. Removing the DOS Shell Window with Windows Perl/Tk
dot : (see . (dot))
Douady, Adrien : Advanced Perl Programming, 18.6. A Detour into Fractals
double indexing scheme (example) : Advanced Perl Programming, 2.4.1. Data Representation
double quotes
  (see also " (double quotation marks))
  Perl Cookbook, 1.0. Introduction
  Learning Perl, 2.3.2. Double-Quoted Strings
  Perl in a Nutshell, 4.2.2. String Interpolation
  associative array elements and : Learning Perl, 5.4.1. The keys Function
  backslash escape and : Learning Perl, 2.3.2. Double-Quoted Strings
  examples of
    Learning Perl, 1.5.2. Asking Questions and Remembering the Result
    Learning Perl on Win32 Systems, 1.6.2. Asking Questions and Remembering the Result
  hash elements : Learning Perl on Win32 Systems, 5.4.1. The keys Function
  qq() : Perl Cookbook, 4.1. Specifying a List In Your Program
  variable interpolation
    (see also variable interpolation)
    Learning Perl, 2.6.4. Interpolation of Scalars into Strings
    Programming Perl, 2.3.3.4. Interpolative context
doubles (NVs) : Advanced Perl Programming, 20.3.1. Scalar Values
Dowd, Sean : Perl in a Nutshell, 14. Email Connectivity
downloading source code
  Perl in a Nutshell, 2. Installing Perl
  Perl in a Nutshell, 2.2. How Is CPAN Organized?
  Perl in a Nutshell, 2.4. Getting and Installing Modules
DProf debugger : Programming Perl, 8.1.8. Alternative Debuggers: The Perl Profiler
dprofpp utility : Perl in a Nutshell, 6.5. The Perl Profiler
drawers : (see directories)
drivelock program (example) : Perl Cookbook, 7.21. Program: netlock
du command, sorting output of : Perl Cookbook, 5.16. Program: dutree
dummyhttpd program (example) : Perl Cookbook, 19.9. Debugging the Raw HTTP Exchange
dump()
  Perl in a Nutshell, Chapter 5, Reference: dump
  Programming Perl, 3.2.29. dump
  CGI.pm module : Perl in a Nutshell, Chapter 10, Reference: dump
  HTML::Parser module : Perl in a Nutshell, Chapter 17, Reference: dump
Dump module : Advanced Perl Programming, 20.3.2.1. Inside AVs
dump_results() (DBI) : Perl in a Nutshell, Chapter 12, Reference: dump_results
Dumper module : Advanced Perl Programming, 10.2.2. Data::Dumper
dumpValue function : Advanced Perl Programming, 2.5. Pretty-Printing
dup() (Mail::Folder) : Perl in a Nutshell, Chapter 14, Reference: dup
duplicate
  list elements, extracting : Perl Cookbook, 4.6. Extracting Unique Elements from a List
  words, finding : Perl Cookbook, 6.16. Detecting Duplicate Words
dutree program (example) : Perl Cookbook, 5.16. Program: dutree
dutree_orig program (example) : Perl Cookbook, 5.16. Program: dutree
DynaLoader module
  Perl in a Nutshell, 8.44. DynaLoader
  Programming Perl, 7.2.12. DynaLoader - Automatic Dynamic Loading of Perl Modules
  Programming Perl, 7.2.21. ExtUtils::Mkbootstrap - Make a Bootstrap File for Use by DynaLoader
dynamic allocation
  Advanced Perl Programming, 1. Data References and Anonymous Storage
  Advanced Perl Programming, 1.2.3. References to Anonymous Storage
  Advanced Perl Programming, 1.7.1. Tcl
dynamic behavior : (see run-time evaluation)
dynamic binding : Advanced Perl Programming, 9. Tie
  arrays : Advanced Perl Programming, 9.2. Tying Arrays
  filehandles : Advanced Perl Programming, 9.4. Tying Filehandles
  hashes : Advanced Perl Programming, 9.3. Tying Hashes
  monitoring variables (example) : Advanced Perl Programming, 9.5. Example: Monitoring Variables
  other languages and : Advanced Perl Programming, 9.6. Comparisons with Other Languages
  scalars : Advanced Perl Programming, 9.1. Tying Scalars
dynamic linking : Programming Perl, 7.2.12. DynaLoader - Automatic Dynamic Loading of Perl Modules
dynamic scoping
  Advanced Perl Programming, 3.1.2. Lexical Versus Dynamic Scoping
  Perl Cookbook, 10.13. Saving Global Values
  Perl in a Nutshell, 4.2.6. Declarations and Scope
  Perl in a Nutshell, 4.7.4. Private and Local Variables
  Programming Perl, 2.6.8. Scoped Declarations

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