Index: D

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## Index: D

^D (Control-D) as eof: 24.5.2. Generating Perl in Other Languages (Programming Perl)
\d (digit) character class: 4.6.4. Character Classes (Perl in a Nutshell)
d command (CPAN.pm): 2.4.4. Installing Modules with the CPAN Module (Perl in a Nutshell)
d command (Perl debugger): 6.2. Debugger Commands (Perl in a Nutshell)
%d conversion: 6.5. Formatted Output with printf (Learning Perl)
-d (debug) command-line switch: 19.1.3. Switches (Programming Perl)
  19.1.3. Switches (Programming Perl)
  20. The Perl Debugger (Programming Perl)
-D (debugging) command-line switch: 19.1.3. Switches (Programming Perl)
-d file test operator: 9.7.3. Discussion (Perl Cookbook)
  4.5.8. File Test Operators (Perl in a Nutshell)
d for digit=\d (for digit): 1.7. Regular Expressions (Programming Perl)
/d modifier: 5.2.4. The tr/// Operator (Transliteration) (Programming Perl)
-d option (perlbug): 6.6. The perlbug Program (Perl in a Nutshell)
/d pattern modifier: 5.2.4. The tr/// Operator (Transliteration) (Programming Perl)
\d shortcut: 8.1.1. Character Class Shortcuts (Learning Perl)
-d switch, perl: 20.6. The Perl Profiler (Programming Perl)
daemon( ) (HTTP::Daemon::ClientConn): 20.3.7.1. HTTP::Daemon::ClientConn methods (Perl in a Nutshell)
daemon servers: 16.23. Program: sigrand (Perl Cookbook)
  17.17.1. Problem (Perl Cookbook)
daemons
  Perl modules for: 22.1. The CPAN modules Directory (Programming Perl)
  taint mode, importance of enabling for: 23.1. Handling Insecure Data (Programming Perl)
dangling statements: Glossary (Programming Perl)
dash: 4.6.4. Character Classes (Perl in a Nutshell)
Data( ) (Win32::ODBC): 24.1. ODBC Methods and Properties (Perl in a Nutshell)
data access
  threads: 17.2.2. Data Access (Programming Perl)
    condition variables: 17.2.2.6. Condition variables (Programming Perl)
    deadlock: 17.2.2.2. Deadlock (Programming Perl)
    locking methods: 17.2.2.5. Locking methods (Programming Perl)
    locking subroutines: 17.2.2.3. Locking subroutines (Programming Perl)
    synchronizing with lock: 17.2.2.1. Synchronizing access with lock (Programming Perl)
    unlocking: 17.2.2.1. Synchronizing access with lock (Programming Perl)
DATA command (SMTP): 16.1.2. The SMTP Protocol and the SMTP Session (Perl in a Nutshell)
Data::Dumper module: 8.50. Data::Dumper (Perl in a Nutshell)
DATA filehandle: 4.4.3. Global Special Filehandles (Perl in a Nutshell)
  28.2. Special Variables in Alphabetical Order (Programming Perl)
data-flow analysis: B.14. Security (Learning Perl)
data( ) (Net::SMTP): 16.1.2.1. Net::SMTP methods (Perl in a Nutshell)
data organization in Perl: 9.1.5. Common Mistakes (Programming Perl)
data, relationships between (see variables also variables)
  5.16.1. Problem (Perl Cookbook)
  (see also variables)
data_sources( ) (DBI): 12.3. DBI Methods (Perl in a Nutshell)
data structures: 9. Data Structures (Programming Perl)
  22.1. The CPAN modules Directory (Programming Perl)
  Glossary (Programming Perl)
  arrays of hashes: 9.3. Arrays of Hashes (Programming Perl)
  binary trees: 11.17. Program: Binary Trees (Perl Cookbook)
  circular, coping with, using weak references: 11.15.1. Problem (Perl Cookbook)
  complex, creating on the fly: 11.. Anonymous Data (Perl Cookbook)
  complex, representing as scalars: 1.2.1.3. Complexities (Programming Perl)
  copying: 11.12.1. Problem (Perl Cookbook)
  flat, linear in Perl: 8. References (Programming Perl)
  hashes of arrays: 9.2. Hashes of Arrays (Programming Perl)
  hashes of functions: 9.5. Hashes of Functions (Programming Perl)
  looping and: 4.4. When Reference Counting Goes Bad (Learning Perl Objects, References and Modules)
    4.4. When Reference Counting Goes Bad (Learning Perl Objects, References and Modules)
  manipulating: 5. Manipulating Complex Data Structures (Learning Perl Objects, References and Modules)
  multidimensional hashes: 9.4. Hashes of Hashes (Programming Perl)
  nested: 3.6. Nested Data Structures (Learning Perl Objects, References and Modules)
    3.6. Nested Data Structures (Learning Perl Objects, References and Modules)
    4.3. Reference Counting and Nested Data Structures (Learning Perl Objects, References and Modules)
  for objects: 12.4. Object Construction (Programming Perl)
  outlines: 11.16. Program: Outlines (Perl Cookbook)
  parsing XML into: 22.1.1. Problem (Perl Cookbook)
  persistent, providing via tie: 14.6. Tie Modules on CPAN (Programming Perl)
  printing: 11.11.1. Problem (Perl Cookbook)
  records of elaborate: 9.6. More Elaborate Records (Programming Perl)
  recursively defined: 7.5. Recursively Defined Data (Learning Perl Objects, References and Modules)
  references to: 8.1. What Is a Reference? (Programming Perl)
  references to anonymous: 4. References and Scoping (Learning Perl Objects, References and Modules)
  references to subroutines: 6. Subroutine References (Learning Perl Objects, References and Modules)
  saving: 9.7. Saving Data Structures (Programming Perl)
  self-referential, container classes holding pointers to: 12.6.1. Garbage Collection with DESTROY Methods (Programming Perl)
  storing to disk: 11.13.1. Problem (Perl Cookbook)
  stringifying: 9.7. Saving Data Structures (Programming Perl)
  transparently persistent: 11.14.1. Problem (Perl Cookbook)
data structures, complex: B.20.1. Complex Data Structures (Learning Perl)
__DATA__ token: 7.12.2. Solution (Perl Cookbook)
  2.6.8. Other Literal Tokens (Programming Perl)
  28.2. Special Variables in Alphabetical Order (Programming Perl)
data types: 4.2. Data Types and Variables (Perl in a Nutshell)
  1.2.1. Variable Syntax (Programming Perl)
  Glossary (Programming Perl)
  built-in: 2.3. Built-in Data Types (Programming Perl)
  circular data structures: 13.13.1. Problem (Perl Cookbook)
  classes as structs: 13.5.1. Problem (Perl Cookbook)
  complex data structures: 4.8. References and Complex Data Structures (Perl in a Nutshell)
  converting between C and Perl: 21.4.5. Fiddling with the Perl Stack from C (Programming Perl)
  internal, Perl and C: 21.2. Internal Data Types (Programming Perl)
  modules for: 32.1.1. Data Types (Programming Perl)
  scalars (see scalars)
  TYPE declarations in Perl: 29.2.99. my (Programming Perl)
  typeglobs: 2.10. Typeglobs and Filehandles (Programming Perl)
database access: 14.. Introduction (Perl Cookbook)
  DBM files
    converting between: 14.3.1. Problem (Perl Cookbook)
    emptying: 14.2.1. Problem (Perl Cookbook)
    making and using: 14.1.1. Problem (Perl Cookbook)
    merging: 14.4.1. Problem (Perl Cookbook)
    sorting: 14.5.1. Problem (Perl Cookbook)
    storing complex data in: 14.6.1. Problem (Perl Cookbook)
  dealing with errors: 14.11.1. Problem (Perl Cookbook)
  ggh program: 14.19. Program: ggh—Grep Netscape Global History (Perl Cookbook)
  persistent data: 14.7.1. Problem (Perl Cookbook)
  speeding up with mod_perl: 21.8.1. Problem (Perl Cookbook)
  SQL: 20.9.3. Discussion (Perl Cookbook)
    queries: 14.9.1. Problem (Perl Cookbook)
      14.14.1. Problem (Perl Cookbook)
      19.6.3. Discussion (Perl Cookbook)
  using transactions: 14.15.1. Problem (Perl Cookbook)
  viewing data one page at a time: 14.16.1. Problem (Perl Cookbook)
databases: 16. Simple Databases (Learning Perl)
  B.7. Databases (Learning Perl)
  12. Databases and Perl (Perl in a Nutshell)
  Data Base Management (see DBM files)
  database handles (DBI methods): 12.2.3. Database Handles and Statement Handles (Perl in a Nutshell)
  DBDs (database drivers): 12.2.1. Database Drivers (DBDs) (Perl in a Nutshell)
  DBI module: 12.2. Design of DBI (Perl in a Nutshell)
  DBI module and: B.7.3. Relational Database Access (Learning Perl)
  DBM (Database Management) facility: 12.1. DBM Databases and DBM Hashes (Perl in a Nutshell)
  files for, read/write access to: 16.3. Fixed-length Random-access Databases (Learning Perl)
  fixed-length random-access: 16.3. Fixed-length Random-access Databases (Learning Perl)
  hashes and: 5.1.1. Why Use a Hash? (Learning Perl)
  Perl connections to: 5. Pattern Matching (Programming Perl)
  Perl modules for operating: 22.1. The CPAN modules Directory (Programming Perl)
  see also DBI: 22.1. The CPAN modules Directory (Programming Perl)
  tying hash variables to: 14. Tied Variables (Programming Perl)
  variable-length text: 16.4. Variable-length (Text) Databases (Learning Perl)
Data::Dumper: 9.7. Saving Data Structures (Programming Perl)
Data::Dumper module: 11.11.2. Solution (Perl Cookbook)
  5.2. Viewing Complex Data with Data::Dumper (Learning Perl Objects, References and Modules)
  5.2. Viewing Complex Data with Data::Dumper (Learning Perl Objects, References and Modules)
  7.7. Displaying Recursively Defined Data (Learning Perl Objects, References and Modules)
  32.1.13. Perl Language Extensions and Internals (Programming Perl)
  32.10. Data::Dumper (Programming Perl)
dataend( ) (Net::SMTP): 16.1.2.1. Net::SMTP methods (Perl in a Nutshell)
datagram sockets: 17.4.3. Discussion (Perl Cookbook)
datagrams: 16.5. Sockets (Programming Perl)
  Glossary (Programming Perl)
DataHash( ) (Win32::ODBC): 24.1. ODBC Methods and Properties (Perl in a Nutshell)
DataReceiveTimeout( ) (Win32::Internet): 22.7.1. General Internet Methods (Perl in a Nutshell)
datasend( ) (Net::SMTP): 16.1.2.1. Net::SMTP methods (Perl in a Nutshell)
DataSendTimeout( ) (Win32::Internet): 22.7.1. General Internet Methods (Perl in a Nutshell)
DataSources( ) (Win32::ODBC): 24.1. ODBC Methods and Properties (Perl in a Nutshell)
date and time
  functions for: 5.1. Perl Functions by Category (Perl in a Nutshell)
  HTTP::Date module: 20.3.5. HTTP::Date (Perl in a Nutshell)
date and time values: 3.. Introduction (Perl Cookbook)
  arithmetic with: 3.4.1. Problem (Perl Cookbook)
  converting to and from Epoch seconds: 3.2.1. Problem (Perl Cookbook)
  Date::DateCalc: 3.4.1. Problem (Perl Cookbook)
  Date::Manip module: 3.8.3. Discussion (Perl Cookbook)
    3.11. Program: hopdelta (Perl Cookbook)
  days, calculating: 3.6.1. Problem (Perl Cookbook)
    number between two dates: 3.5.1. Problem (Perl Cookbook)
  file access timestamps: 9.1.1. Problem (Perl Cookbook)
  high-resolution timers: 3.9.1. Problem (Perl Cookbook)
  hopdelta program: 3.11. Program: hopdelta (Perl Cookbook)
  parsing information from strings: 3.7.1. Problem (Perl Cookbook)
  printing: 3.8.1. Problem (Perl Cookbook)
  seconds passed since Epoch: 3.. Introduction (Perl Cookbook)
  sleeps: 3.10.1. Problem (Perl Cookbook)
  sorting mail by: 10.18. Program: Sorting Your Mail (Perl Cookbook)
  Time::gmtime module: 3.3.2. Solution (Perl Cookbook)
  Time::HiRes module: 3.9.2. Solution (Perl Cookbook)
  Time::Local module: 3.2.2. Solution (Perl Cookbook)
  Time::timelocal module: 3.3.2. Solution (Perl Cookbook)
  timing out operations: 16.21.1. Problem (Perl Cookbook)
  today's date, finding: 3.1.1. Problem (Perl Cookbook)
  years: 3.. Introduction (Perl Cookbook)
date command (Unix): 14.1. The system Function (Learning Perl)
  16.4. Variable-length (Text) Databases (Learning Perl)
  capturing output and: 14.4. Using Backquotes to Capture Output (Learning Perl)
date function (see localtime function)
date( ) (Net::NNTP): 17.2.2. Net::NNTP Reference (Perl in a Nutshell)
DateCalc( ): 3.11. Program: hopdelta (Perl Cookbook)
Date::Calc module: 3.4.2. Solution (Perl Cookbook)
  3.6.2. Solution (Perl Cookbook)
Date::DateCalc module: 3.. Introduction (Perl Cookbook)
Date::Manip module: 3.. Introduction (Perl Cookbook)
  3.7.2. Solution (Perl Cookbook)
  3.11. Program: hopdelta (Perl Cookbook)
dates
  Perl modules for: 22.1. The CPAN modules Directory (Programming Perl)
dates, portability of: 25.8. Dates and Times (Programming Perl)
day, month, year, hour, minute, seconds (DMYHMS): 3.. Introduction (Perl Cookbook)
daylight savings time (DST): 6.8.1. Exercise [30 min] (Learning Perl Objects, References and Modules)
Day_of_week( ): 3.6.2. Solution (Perl Cookbook)
Day_of_Year( ): 3.6.2. Solution (Perl Cookbook)
days (see date and time values)
DB module: 8.51. DB (Perl in a Nutshell)
  32.1.13. Perl Language Extensions and Internals (Programming Perl)
DB package, caller function: 29.2.8. caller (Programming Perl)
DBD (Database drivers)
  Perl modules for: 22.1. The CPAN modules Directory (Programming Perl)
DBD module: 14.9.2. Solution (Perl Cookbook)
DBD::CSV module: 14.17.2. Solution (Perl Cookbook)
DBDs (database drivers): 12. Databases and Perl (Perl in a Nutshell)
  12.2.1. Database Drivers (DBDs) (Perl in a Nutshell)
DBD::SQLite module: 14.. Introduction (Perl Cookbook)
  14.18.2. Solution (Perl Cookbook)
DB_File module: 11.14.2. Solution (Perl Cookbook)
  8.52. DB_File (Perl in a Nutshell)
  32.1.10. DBM Interfaces (Programming Perl)
  Data::Dumper module, using with: 32.10. Data::Dumper (Programming Perl)
  DB_RECNO access method: 8.8.2. Solution (Perl Cookbook)
  sorting large DBM files: 14.5.2. Solution (Perl Cookbook)
db2gdbm program: 14.3.2. Solution (Perl Cookbook)
DBI (Database Interface)
  Perl modules for: 22.1. The CPAN modules Directory (Programming Perl)
DBI_ environment variables: 12.4. DBI Environment Variables (Perl in a Nutshell)
DBI module: 14.9.2. Solution (Perl Cookbook)
  B.7.3. Relational Database Access (Learning Perl)
  1.1. What's Perl Good For? (Perl in a Nutshell)
  12. Databases and Perl (Perl in a Nutshell)
  12.2. Design of DBI (Perl in a Nutshell)
  database and statement handles: 12.2.3. Database Handles and Statement Handles (Perl in a Nutshell)
  environment variables for: 12.4. DBI Environment Variables (Perl in a Nutshell)
  methods of: 12.3. DBI Methods (Perl in a Nutshell)
DBIx::Dump module: 14.8.2. Solution (Perl Cookbook)
DBM (Database Management) facility: 12.1. DBM Databases and DBM Hashes (Perl in a Nutshell)
DBM file
  storing complex data values in: 14.6. Tie Modules on CPAN (Programming Perl)
DBM files: 16.1. DBM Files and DBM Hashes (Learning Perl)
  B.21. Tied Variables (Learning Perl)
  Glossary (Programming Perl)
  complex data in: 14.6.1. Problem (Perl Cookbook)
  complex data values, storing in: 32.10. Data::Dumper (Programming Perl)
  converting between: 14.3.1. Problem (Perl Cookbook)
  dbmclose and dbmopen functions: 29.2.21. dbmclose (Programming Perl)
  deleting from: 29.2.24. delete (Programming Perl)
  emptying: 14.2.1. Problem (Perl Cookbook)
  GDBM files: 14.3.2. Solution (Perl Cookbook)
  locking: 16.2.1. File Locking (Programming Perl)
  making and using: 14.1.1. Problem (Perl Cookbook)
  merging: 14.4.1. Problem (Perl Cookbook)
  modules for: 32.1.10. DBM Interfaces (Programming Perl)
  sorting: 14.5.1. Problem (Perl Cookbook)
DBM hashes: 16.1. DBM Files and DBM Hashes (Learning Perl)
  B.21. Tied Variables (Learning Perl)
DBM libraries: 14.. Introduction (Perl Cookbook)
DBM modules, portability of: 25.7. Standard Modules (Programming Perl)
dbmclose( ): 5. Function Reference (Perl in a Nutshell)
dbmclose function: 16.1.1. Opening and Closing DBM Hashes (Learning Perl)
  14. Tied Variables (Programming Perl)
dbmopen( ): 5. Function Reference (Perl in a Nutshell)
  12.1. DBM Databases and DBM Hashes (Perl in a Nutshell)
dbmopen function: 16.1.1. Opening and Closing DBM Hashes (Learning Perl)
  A.9.1. Exercise (Section 10.7.1) (Learning Perl Objects, References and Modules)
  14. Tied Variables (Programming Perl)
  use declarations with: 14. Tied Variables (Programming Perl)
dbprofpp program: 20.6. The Perl Profiler (Programming Perl)
dclone( ): 11.12.2. Solution (Perl Cookbook)
  13.7.2. Solution (Perl Cookbook)
deadlock in threads: 17.2.2.2. Deadlock (Programming Perl)
deallocating memory: 8.5.2. Garbage Collection, Circular References, and Weak References (Programming Perl)
Debug( ) (Win32::ODBC): 24.1. ODBC Methods and Properties (Perl in a Nutshell)
Debug style (XML::Parser): 13.4. XML::Parser Styles (Perl in a Nutshell)
debugger for Perl: B.15. Debugging (Learning Perl)
debugging: 6. Debugging (Perl in a Nutshell)
  19.1.3. Switches (Programming Perl)
  20. The Perl Debugger (Programming Perl)
  23.1. Handling Insecure Data (Programming Perl)
  (see also taint)
  backend modules for: 18.4. Compiler Backends (Programming Perl)
  bug reports: 0.6.3. Bug Reports (Programming Perl)
  CGI scripts: 19.. Behind the Scenes (Perl Cookbook)
    19.3.3.3. Is the script valid Perl? (Perl Cookbook)
    10.6. Debugging (Perl in a Nutshell)
  Changes file and: 13.2. Looking at the Templates (Learning Perl Objects, References and Modules)
  controlling from programs: 20.1. Using the Debugger (Programming Perl)
  -d, -D options (perl): 6.1. The Perl Debugger (Perl in a Nutshell)
    6.5. The Perl Profiler (Perl in a Nutshell)
  DB module: 32.1.13. Perl Language Extensions and Internals (Programming Perl)
  debug level, setting through class or instances: 12.8. Managing Class Data (Programming Perl)
  debugger code, command for loading: 19.2. Environment Variables (Programming Perl)
  debugger customization: 20.3. Debugger Customization (Programming Perl)
  debugger, customizing
    options: 20.3.3. Debugger Options (Programming Perl)
  debugger support, Perl: 20.5. Debugger Support (Programming Perl)
  debugger, unattended execution: 20.4. Unattended Execution (Programming Perl)
  Devel::Peek module for XS programs: 32.1.13. Perl Language Extensions and Internals (Programming Perl)
  enabling warnings during: A.3.1. Exercise 1 (Section 4.9.1) (Learning Perl Objects, References and Modules)
  global destruction of objects other references, controlling: 19.2. Environment Variables (Programming Perl)
  overloading: 13.10. Overloading Diagnostics (Programming Perl)
  Perl debugger: 6.1. The Perl Debugger (Perl in a Nutshell)
    commands for: 6.2. Debugger Commands (Perl in a Nutshell)
    customizing: 6.4. Customizing the Debugger (Perl in a Nutshell)
  Perl debugger commands: 20.2. Debugger Commands (Programming Perl)
  Perl profiler (DProf): 6.5. The Perl Profiler (Perl in a Nutshell)
  Perl, using C compiler -DDEBUGGING option: 12.5. Class Inheritance (Programming Perl)
  perlbug program: 6.6. The perlbug Program (Perl in a Nutshell)
  raw HTTP exchange: 19.8.1. Problem (Perl Cookbook)
  symbolic: Glossary (Programming Perl)
  turning on in tied filehandle: 14.4.1. Filehandle-Tying Methods (Programming Perl)
  Unix security bugs: 23.2.1. Unix Kernel Security Bugs (Programming Perl)
  viewing complex data: 5.1. Using the Debugger to View Complex Data (Learning Perl Objects, References and Modules)
  x command: 5.1. Using the Debugger to View Complex Data (Learning Perl Objects, References and Modules)
    5.2. Viewing Complex Data with Data::Dumper (Learning Perl Objects, References and Modules)
debugging flags: 28.2. Special Variables in Alphabetical Order (Programming Perl)
$DEBUGGING ($^D) variable: 4.4.1. Global Special Variables (Perl in a Nutshell)
debug_print( ) (Mail::Folder): 16.2.3. Handle Folders with Mail::Folder (Perl in a Nutshell)
decimal integer conversion: 6.5. Formatted Output with printf (Learning Perl)
decimal points, lining up: 7. Formats (Programming Perl)
decimals
  formatting for output: 17.3. Transforming Items from a List with map (Learning Perl)
  rounding
    printf function and: 6.5. Formatted Output with printf (Learning Perl)
    sprintf function and: 15.3.1. Using sprintf with "Money Numbers" (Learning Perl)
declarations: 4.1. Program Structure (Perl in a Nutshell)
  1.1. Getting Started (Programming Perl)
  4. Statements and Declarations (Programming Perl)
  Glossary (Programming Perl)
  structs: 12.7.2. Generating Classes with Class::Struct (Programming Perl)
  fields with use fields pragma: 12.7.1. Field Declarations with use fields (Programming Perl)
  global: 4.7. Global Declarations (Programming Perl)
  global variables, lexically scoped: 4.8.3. Lexically Scoped Global Declarations: our (Programming Perl)
  methods, lvalues, indicating return of: 12.7.6. New Tricks (Programming Perl)
  package: 10. Packages (Programming Perl)
    29.2.109. package (Programming Perl)
  packages: 7.1. Namespaces and Packages (Perl in a Nutshell)
    1.2.1.4. Simplicities (Programming Perl)
    4.8. Scoped Declarations (Programming Perl)
  private vs. local: 4.7.4. Private and Local Variables (Perl in a Nutshell)
  scoped: 4.8. Scoped Declarations (Programming Perl)
  subroutines: 4.7. Subroutines (Perl in a Nutshell)
    4.7. Global Declarations (Programming Perl)
    with definitions: 6.1. Syntax (Programming Perl)
  use declarations: 1.2.1.4. Simplicities (Programming Perl)
  variables: 4.2.7. Declarations and Scope (Perl in a Nutshell)
    4. Statements and Declarations (Programming Perl)
    4.8.1. Scoped Variable Declarations (Programming Perl)
declarative approach, regular expression programming: 5.10.3. Programmatic Patterns (Programming Perl)
declaring
  formats: 7. Formats (Programming Perl)
  subroutines: 29.2.167. sub (Programming Perl)
    without defining: 6.1. Syntax (Programming Perl)
decomposing characters into simpler ones: 5.4.3.2. Standard Unicode properties (Programming Perl)
decompressing CPAN modules: 22.2.1. Decompressing and Unpacking CPAN Modules (Programming Perl)
decrementing variables: 1.5.4. Unary Arithmetic Operators (Programming Perl)
  Glossary (Programming Perl)
decryption (see encryption)
deep copies: 11.12.3. Discussion (Perl Cookbook)
Default handler (Expat): 13.3. Expat Handlers (Perl in a Nutshell)
default package: 4.8. Scoped Declarations (Programming Perl)
DEFAULT pseudosignal: 16.1. Signals (Programming Perl)
default values: Glossary (Programming Perl)
default values for variables: 1.2.1. Problem (Perl Cookbook)
default variable ($_): 3.7. Perl's Favorite Default: $_ (Learning Perl)
  =~ binding operator and: 9.3. The Binding Operator, =~ (Learning Perl)
  input stored in: 6.1. Input from Standard Input (Learning Perl)
default_port( ) (URI::URL): 20.5.3. URI::URL (Perl in a Nutshell)
defaults: 1.2.2. Is Perl Easy or Hard? (Learning Perl)
  output filehandle: 11.4.1. Changing the Default Output Filehandle (Learning Perl)
defaults( ) (CGI.pm): 10.7. CGI.pm Reference (Perl in a Nutshell)
defined( ): 5. Function Reference (Perl in a Nutshell)
defined function: 2.12. The defined Function (Learning Perl)
  13.6. Changing Ownership (Learning Perl)
  29.2.23. defined (Programming Perl)
  Glossary (Programming Perl)
defined operator: 1.2.3. Discussion (Perl Cookbook)
definedness: 1.. Introduction (Perl Cookbook)
  1.2.3. Discussion (Perl Cookbook)
defining subroutines: 6.2. Semantics (Programming Perl)
definitions: Glossary (Programming Perl)
  classes (object-oriented modules as): 11.1. Using Modules (Programming Perl)
  subroutines
    declarations vs.: 4.7. Global Declarations (Programming Perl)
    loading from other files: 4.7. Global Declarations (Programming Perl)
    loading with AUTOLOAD: 10.2. Autoloading (Programming Perl)
deg2rad( ): 2.10.3. Discussion (Perl Cookbook)
deiconify( ) (Frame widget): 21.18.1. Toplevel Methods (Perl in a Nutshell)
del( ) (DB_File module): 8.52. DB_File (Perl in a Nutshell)
DEL in hexadecimal: 2.6.2. String Literals (Programming Perl)
delay( ) (LWP::RobotUA): 20.2.1. LWP::RobotUA Sections (Perl in a Nutshell)
delaying module loading: 12.3.1. Problem (Perl Cookbook)
delegation: 10.4. Additional Instance Variables in Subclasses (Learning Perl Objects, References and Modules)
delete( ): 5. Function Reference (Perl in a Nutshell)
  Canvas widget: 21.12.3. Canvas Methods (Perl in a Nutshell)
  CGI.pm module: 10.7. CGI.pm Reference (Perl in a Nutshell)
  Entry widget: 21.8.2. Entry Methods (Perl in a Nutshell)
  HTML::Parser module: 20.4.3. HTML::Element (Perl in a Nutshell)
  Listbox widget: 21.10.2. Listbox Methods (Perl in a Nutshell)
  Mail::Send module: 16.2.2. Better Header Control with Mail::Send (Perl in a Nutshell)
  Menu widget: 21.15.2. Menu Methods (Perl in a Nutshell)
  Net::FTP module: 18.2. Net::FTP (Perl in a Nutshell)
  Net::LDAP: 19.4. Net::LDAP Methods (Perl in a Nutshell)
  Net::POP3 module: 16.1.3. Retrieving Email with Net::POP3 (Perl in a Nutshell)
  Text widget: 21.11.2. Text Methods (Perl in a Nutshell)
  5.4.2. Solution (Perl Cookbook)
  compared to undef( ): 5.4.3. Discussion (Perl Cookbook)
  multiple hash key values: 5.8.3. Discussion (Perl Cookbook)
delete function: 5.4.2. The delete Function (Learning Perl)
  29.2.24. delete (Programming Perl)
  tied arrays, not returning deleted value for: 24.1.5. Previous Perl Traps (Programming Perl)
Delete( ) (Win32::Internet module): 22.7.2. FTP Functions (Perl in a Nutshell)
delete_all( ) (CGI.pm): 10.7. CGI.pm Reference (Perl in a Nutshell)
delete_content( ) (HTML::Parser): 20.4.3. HTML::Element (Perl in a Nutshell)
DeleteKey( ) (Win32::Registry): 22.15.1. Win32::Registry Methods (Perl in a Nutshell)
delete_label( ) (Mail::Folder): 16.2.3. Handle Folders with Mail::Folder (Perl in a Nutshell)
delete_message( ) (Mail::Folder): 16.2.3. Handle Folders with Mail::Folder (Perl in a Nutshell)
DeleteValue( ) (Win32::Registry): 22.15.1. Win32::Registry Methods (Perl in a Nutshell)
deleting
  all debugger actions: 20.2.6. Actions and Command Execution (Programming Perl)
  array elements: 29.2.111. pop (Programming Perl)
    29.2.149. shift (Programming Perl)
    29.2.160. splice (Programming Perl)
  breakpoints: 20.2.2. Breakpoints (Programming Perl)
  characters: 29.2.11. chomp (Programming Perl)
  clearing the screen: 15.3.1. Problem (Perl Cookbook)
  directories: 29.2.135. rmdir (Programming Perl)
    29.2.188. unlink (Programming Perl)
  directories and their contents: 9.8.1. Problem (Perl Cookbook)
  DOS shell window: 15.17.1. Problem (Perl Cookbook)
  emptying DBM files: 14.2.1. Problem (Perl Cookbook)
  files: 9.2.1. Problem (Perl Cookbook)
    29.2.188. unlink (Programming Perl)
    last line of: 8.10.1. Problem (Perl Cookbook)
  found but unreplaced characters: 5.2.4. The tr/// Operator (Transliteration) (Programming Perl)
  hash elements: 5.4.1. Problem (Perl Cookbook)
    29.2.24. delete (Programming Perl)
  HTML tags from strings: 20.6.1. Problem (Perl Cookbook)
  selected subroutine return values: 10.8.1. Problem (Perl Cookbook)
  whitespace at string ends: 1.19.1. Problem (Perl Cookbook)
del_group( ) (News::Newsrc): 17.3.1. News::Newsrc Reference (Perl in a Nutshell)
delimiters: 1.. Introduction (Perl Cookbook)
  Glossary (Programming Perl)
  changing for s/// substitution operator: 9.6.2. Different Delimiters (Learning Perl)
  in lists: 3.3.1. The qw Shortcut (Learning Perl)
  nonpaired: 9.1. Matches with m// (Learning Perl)
  pattern-matching operators and: 5.2. Pattern-Matching Operators (Programming Perl)
delta( ) (Scrollbar): 21.9.1. Scrollbar Methods (Perl in a Nutshell)
Delta_Days( ): 3.5.3. Discussion (Perl Cookbook)
Delta_DHMS( ): 3.5.3. Discussion (Perl Cookbook)
denial-of-service problems (patterns and regular expressions), security concerns: 23.3.2. Code Masquerading as Data (Programming Perl)
Deparse backend (Perl compiler): 3.4. The Perl Compiler (Perl in a Nutshell)
dequote( ): 1.16.3. Discussion (Perl Cookbook)
dereference-address operator (*), C language: 3.21. C Operators Missing from Perl (Programming Perl)
dereference operators, overloading: 13.3. Overloadable Operators (Programming Perl)
dereferencing: 11.3.1. Problem (Perl Cookbook)
  4.8.2. Dereferencing (Perl in a Nutshell)
  8.1. What Is a Reference? (Programming Perl)
  8.1. What Is a Reference? (Programming Perl)
  8.3. Using Hard References (Programming Perl)
  8.3.1. Using a Variable as a Variable Name (Programming Perl)
  8.3.3. Using the Arrow Operator (Programming Perl)
  Glossary (Programming Perl)
  array elements: 9.1.3. Access and Printing (Programming Perl)
  array references: 3.3. Dereferencing the Array Reference (Learning Perl Objects, References and Modules)
    3.3. Dereferencing the Array Reference (Learning Perl Objects, References and Modules)
    3.6. Nested Data Structures (Learning Perl Objects, References and Modules)
    4.2. What if That Was the Name? (Learning Perl Objects, References and Modules)
  coderefs: 6.1. Referencing a Named Subroutine (Learning Perl Objects, References and Modules)
    6.1. Referencing a Named Subroutine (Learning Perl Objects, References and Modules)
  hash references: 3.8. References to Hashes (Learning Perl Objects, References and Modules)
  hash values as functions: 9.5. Hashes of Functions (Programming Perl)
  lexical variables and: 6.4. Closures (Learning Perl Objects, References and Modules)
  operator for (see arrow operator)
  typeglobs: 10.1. Symbol Tables (Programming Perl)
derived classes: 12.1. Brief Refresher on Object-Oriented Lingo (Programming Perl)
  Glossary (Programming Perl)
  empty subclass test: Glossary (Programming Perl)
  methods as wrappers around base class methods: 12.5.2. Accessing Overridden Methods (Programming Perl)
descriptors (see file descriptors)
deselect( )
  Checkbutton widget: 21.5.1. Checkbutton Methods (Perl in a Nutshell)
  Radiobutton widget: 21.6.1. Radiobutton Methods (Perl in a Nutshell)
DESTROY method: 7.3. Object-Oriented Perl (Perl in a Nutshell)
  inheritance and: 10.2. Beating a Dead Horse (Learning Perl Objects, References and Modules)
    10.2. Beating a Dead Horse (Learning Perl Objects, References and Modules)
  nested objects: 10.1. Nested Object Destruction (Learning Perl Objects, References and Modules)
  purpose: 10. Object Destruction (Learning Perl Objects, References and Modules)
    10. Object Destruction (Learning Perl Objects, References and Modules)
destroying threads
  detach method: 17.2.1.4. The detach method (Programming Perl)
  join method: 17.2.1.2. Thread destruction (Programming Perl)
destructors: 13.. Methods (Perl Cookbook)
  13.2.1. Problem (Perl Cookbook)
  12.6. Instance Destructors (Programming Perl)
  Glossary (Programming Perl)
  Glossary (Programming Perl)
  class variables and: 10.6. Weakening the Argument (Learning Perl Objects, References and Modules)
  controlling: 19.2. Environment Variables (Programming Perl)
  garbage collection with: 12.6.1. Garbage Collection with DESTROY Methods (Programming Perl)
  IO::File objects and: 11.7. References to Filehandles (Learning Perl Objects, References and Modules)
  nested objects example: 10.1. Nested Object Destruction (Learning Perl Objects, References and Modules)
  shared memory and semaphore: 16.4. System V IPC (Programming Perl)
detach method: 17.2.1.4. The detach method (Programming Perl)
$dev file statistic: 29.2.165. stat (Programming Perl)
$dev (device number): 11.6.1. The stat and lstat Functions (Learning Perl)
Devel::DProf module: 8.53. Devel::DProf (Perl in a Nutshell)
Devel::PPPort module: 8.54. Devel::PPPort (Perl in a Nutshell)
Devel::Dprof module: 20.6. The Perl Profiler (Programming Perl)
  profiling subroutine execution with: 20.6. The Perl Profiler (Programming Perl)
development support, modules for: 22.1. The CPAN modules Directory (Programming Perl)
DevelopMentor: 14.1. What Is SOAP? (Perl in a Nutshell)
Devel::Peek module: 11.15.3. Description (Perl Cookbook)
  32.1.13. Perl Language Extensions and Internals (Programming Perl)
Devel::SelfStubber module: 32.1.17. Module Installation Support (Programming Perl)
  8.55. Devel::SelfStubber (Perl in a Nutshell)
Devel::SmallProf module: 20.6. The Perl Profiler (Programming Perl)
devices (hardware): Glossary (Programming Perl)
diacritics: 1.8.3. Discussion (Perl Cookbook)
  converting case and: 1.13.3. Discussion (Perl Cookbook)
diagnostic messages, from diamond operator\: 6.2. Input from the Diamond Operator (Learning Perl)
diagnostics module: 8.56. diagnostics (Perl in a Nutshell)
  32.1.13. Perl Language Extensions and Internals (Programming Perl)
diagnostics pragma: B.6.2. The diagnostics Pragma (Learning Perl)
dialog boxes with Tk toolkit: 15.15.1. Problem (Perl Cookbook)
DialogBox widget, Tk: 15.15.2. Solution (Perl Cookbook)
diamond operator ( ): 6.2. Input from the Diamond Operator (Learning Perl)
  @ARGV array and: 6.3. The Invocation Arguments (Learning Perl)
  in-place editing of text files and: 16.4. Variable-length (Text) Databases (Learning Perl)
die( ): 4.9. Filehandles (Perl in a Nutshell)
  5. Function Reference (Perl in a Nutshell)
die function: 10.12.2. Solution (Perl Cookbook)
  11.3. Fatal Errors with die (Learning Perl)
  29.2.25. die (Programming Perl)
  exit function versus: 29.2.35. exit (Programming Perl)
  fatal errors, causing: Glossary (Programming Perl)
  quit signal handling and: 16.1. Signals (Programming Perl)
__DIE__ signal: 16.15.3. Discussion (Perl Cookbook)
dieLevel option (debugger): 20.3.3. Debugger Options (Programming Perl)
differences of lists: 4.8.1. Problem (Perl Cookbook)
  computing: 4.9.1. Problem (Perl Cookbook)
  simple and symmetric: 4.9.3. Discussion (Perl Cookbook)
digest( )
  (Digest modules): 8.57. Digest (Perl in a Nutshell)
  (Digest::MD5 module): 8.58. Digest::MD5 (Perl in a Nutshell)
Digest modules: 8.57. Digest (Perl in a Nutshell)
Digest::MD5 module: 8.58. Digest::MD5 (Perl in a Nutshell)
digits: 1.7. Regular Expressions (Programming Perl)
  in names: 2.5. Names (Programming Perl)
digits, \d shortcut for: 8.1.1. Character Class Shortcuts (Learning Perl)
-digits option (Scale): 21.13. The Scale Widget (Perl in a Nutshell)
dir( ) (Net::FTP): 18.2. Net::FTP (Perl in a Nutshell)
direct object syntax: 10.3. Indirect Object Notation (Learning Perl Objects, References and Modules)
  10.3. Indirect Object Notation (Learning Perl Objects, References and Modules)
directives (pod): 26.1.2. Pod Directives (Programming Perl)
  Glossary (Programming Perl)
directories: 9.. Introduction (Perl Cookbook)
  13.3. Links and Files (Learning Perl)
  changing working: 29.2.9. chdir (Programming Perl)
  closing: 29.2.17. closedir (Programming Perl)
  copying and moving files: 9.3.1. Problem (Perl Cookbook)
  creating: 29.2.94. mkdir (Programming Perl)
  creating or removing portably: 32.1.4. Filenames, Filesystems, and File Locking (Programming Perl)
  current working, getting pathname of: 32.1.4. Filenames, Filesystems, and File Locking (Programming Perl)
  deleting: 9.8.1. Problem (Perl Cookbook)
    29.2.135. rmdir (Programming Perl)
    29.2.188. unlink (Programming Perl)
  deleting files: 9.2.1. Problem (Perl Cookbook)
  DirHandle module: 32.1.5. Filehandle, Directory Handle, and Stream I/O Utilities (Programming Perl)
  file-related functions: 5.1. Perl Functions by Category (Perl in a Nutshell)
  file test checks on trees: 32.1.4. Filenames, Filesystems, and File Locking (Programming Perl)
  file test operator: 1.5.7. Some File Test Operators (Programming Perl)
  functions dealing with: 29.1. Perl Functions by Category (Programming Perl)
  functions for: 5.1. Perl Functions by Category (Perl in a Nutshell)
  handles: Glossary (Programming Perl)
  IO::Dir module: 32.1.5. Filehandle, Directory Handle, and Stream I/O Utilities (Programming Perl)
  making/removing: 13.4. Making and Removing Directories (Learning Perl)
  manipulating: 12. Directory Operations (Learning Perl)
  multiple names for same file: 9.4.1. Problem (Perl Cookbook)
  of modules: 12.8.1. Problem (Perl Cookbook)
  opendir function: 29.2.105. opendir (Programming Perl)
  parsing filenames: 9.10.1. Problem (Perl Cookbook)
  Perl modules for: 22.1. The CPAN modules Directory (Programming Perl)
  prepending to @INC: 19.1.3. Switches (Programming Perl)
  processing all files in: 9.5.1. Problem (Perl Cookbook)
    recursively: 9.7.1. Problem (Perl Cookbook)
  reading entries from: 29.2.121. readdir (Programming Perl)
  recursively duplicating: 9.12. Program: symirror (Perl Cookbook)
  renaming files: 9.9.1. Problem (Perl Cookbook)
  represented as hashes: 7.6. Building Recursively Defined Data (Learning Perl Objects, References and Modules)
  rewinddir function: 29.2.133. rewinddir (Programming Perl)
  root, redefining: 29.2.15. chroot (Programming Perl)
  seekdir function: 29.2.139. seekdir (Programming Perl)
  separating with colon: 2.5.2. Extending @INC with PERL5LIB (Learning Perl Objects, References and Modules)
  sorting contents of: 9.. Introduction (Perl Cookbook)
    9.13. Program: lst (Perl Cookbook)
  t files and: 14.1. What the Test Harness Does (Learning Perl Objects, References and Modules)
  timestamps: 9.1.1. Problem (Perl Cookbook)
directory handles: 9.. Executive Summary (Perl Cookbook)
  12.4. Directory Handles (Learning Perl)
directory service: 19. Lightweight Directory Access with Net::LDAP (Perl in a Nutshell)
DirHandle module: 8.59. DirHandle (Perl in a Nutshell)
dirname( ): 9.10.3. Discussion (Perl Cookbook)
dirname function, File::Basename module and: 13.8.1. The File::Basename Module (Learning Perl)
dirname subroutine (File::Basename): 12.1. Sample Function-Oriented Interface: File::Basename (Learning Perl Objects, References and Modules)
-disabledforeground option (widgets): 21.3. Common Widget Configuration Options (Perl in a Nutshell)
disciplines: 29.2.104. open (Programming Perl)
  filehandles, setting up with binmode: 29.2.6. binmode (Programming Perl)
disconnect( ) (DBI): 12.3. DBI Methods (Perl in a Nutshell)
Disconnect( ) (Win32::Pipe): 22.13.1. Win32::Pipe Methods (Perl in a Nutshell)
disk usage, library: 14.. Introduction (Perl Cookbook)
dispatch_from( ) (SOAP::Lite): 14.2.1. SOAP::Lite Methods (Perl in a Nutshell)
Display( ) (Win32::Console): 22.2. Win32::Console (Perl in a Nutshell)
Distinguished Name (DN): 18.8.3. Discussion (Perl Cookbook)
distributions
  alternate installation locations: 13.6. Alternate Installation Locations (PREFIX=...) (Learning Perl Objects, References and Modules)
  announcing CPAN modules: 15.5. Announcing the Module (Learning Perl Objects, References and Modules)
  copyrights and licensing: 13.2. Looking at the Templates (Learning Perl Objects, References and Modules)
  embedded documentation: 13.4. Embedded Documentation (Learning Perl Objects, References and Modules)
  Exporter module: 13.3. The Prototype Module Itself (Learning Perl Objects, References and Modules)
  h2xs tool: 13.1. Starting with h2xs (Learning Perl Objects, References and Modules)
  make dist and: 13.9. Trivial make dist (Learning Perl Objects, References and Modules)
    13.9. Trivial make dist (Learning Perl Objects, References and Modules)
  Makefile.PL: 13.5. Controlling the Distribution with Makefile.PL (Learning Perl Objects, References and Modules)
  modules within: 13.3. The Prototype Module Itself (Learning Perl Objects, References and Modules)
  POD format: 13.4. Embedded Documentation (Learning Perl Objects, References and Modules)
  preparing: 15.3. Preparing Your Distribution (Learning Perl Objects, References and Modules)
    15.3. Preparing Your Distribution (Learning Perl Objects, References and Modules)
  qw( ) lists: 13.3. The Prototype Module Itself (Learning Perl Objects, References and Modules)
  template files: 13.2. Looking at the Templates (Learning Perl Objects, References and Modules)
  testing: 13.7. Trivial make test (Learning Perl Objects, References and Modules)
    14. Essential Testing (Learning Perl Objects, References and Modules)
  Test::More module: 14.3. Writing Tests with Test::More (Learning Perl Objects, References and Modules)
  Test::Simple module: 14.2. Writing Tests with Test::Simple (Learning Perl Objects, References and Modules)
    14.2. Writing Tests with Test::Simple (Learning Perl Objects, References and Modules)
  uploading to CPAN: 15.4. Uploading Your Distribution (Learning Perl Objects, References and Modules)
    15.4. Uploading Your Distribution (Learning Perl Objects, References and Modules)
  version numbers: 13.3. The Prototype Module Itself (Learning Perl Objects, References and Modules)
    15.3. Preparing Your Distribution (Learning Perl Objects, References and Modules)
distributions( ) (Net::NNTP): 17.2.2. Net::NNTP Reference (Perl in a Nutshell)
division (see multiplicative operators)
division operator (/): 2.2.5. Numeric Operators (Learning Perl)
  4.5.3. Arithmetic Operators (Perl in a Nutshell)
dlineinfo( ) (Text widget): 21.11.2. Text Methods (Perl in a Nutshell)
DMYHMS (day, month, year, hour, minute, seconds): 3.. Introduction (Perl Cookbook)
DMYHMS values (see date and time values)
DN (Distinguished Name): 18.8.3. Discussion (Perl Cookbook)
DNS (domain name server): 16.5. Sockets (Programming Perl)
DNS lookups: 18.1.1. Problem (Perl Cookbook)
do( ): 5. Function Reference (Perl in a Nutshell)
  DBI module: 12.3. DBI Methods (Perl in a Nutshell)
  10.. Introduction (Perl Cookbook)
  configuration files, reading: 8.16.3. Discussion (Perl Cookbook)
  finding number of rows returned by SQL queries: 14.14.2. Solution (Perl Cookbook)
do {} operator: 3.1. Terms and List Operators (Leftward) (Programming Perl)
do BLOCK
  iterating: 4.5. Bare Blocks (Programming Perl)
  terminating: 4.5. Bare Blocks (Programming Perl)
  29.2.26. do (block) (Programming Perl)
do FILE operator: 29.2.27. do (file) (Programming Perl)
do loops: 24.1.1. Universal Blunders (Programming Perl)
do operator: 2.3. Using do (Learning Perl Objects, References and Modules)
do statement, conditional modifiers with: 4.3.1.4. Modifiers (Perl in a Nutshell)
do SUBROUTINE operator: 29.2.28. do (subroutine) (Programming Perl)
doc directory (CPAN), official Perl manpages: 22. CPAN (Programming Perl)
Doctype handler (Expat): 13.3. Expat Handlers (Perl in a Nutshell)
DoctypeFin handler (Expat): 13.3. Expat Handlers (Perl in a Nutshell)
Document Object Model (DOM): 22.. History of Perl and XML (Perl Cookbook)
documentation
  books on Perl: 0.5. Offline Documentation (Programming Perl)
  bug reports: 0.6.3. Bug Reports (Programming Perl)
  C library functions: 29. Functions (Programming Perl)
  default system viewer, calling: 20.2.7. Miscellaneous Commands (Programming Perl)
  distribution considerations: 13. Writing a Distribution (Learning Perl Objects, References and Modules)
  embedded for distribution: 13.4. Embedded Documentation (Learning Perl Objects, References and Modules)
  modules for: 32.1.16. Documentation Support (Programming Perl)
  Perl manpages: 0.4. Online Documentation (Programming Perl)
  testing and: 14. Essential Testing (Learning Perl Objects, References and Modules)
documentation,Perl: 1.3.3. Are There Any Other Kinds of Support? (Learning Perl)
  B.1. Further Documentation (Learning Perl)
  embedding: B.28. Embedded Documentation (Learning Perl)
  2.5. Documentation (Perl in a Nutshell)
  4.13. Pod (Perl in a Nutshell)
  = to signify in programs: 4.1. Program Structure (Perl in a Nutshell)
  utilities for: 4.13.3. Pod Utilities (Perl in a Nutshell)
documentation, standard modules: 11. Modules (Programming Perl)
documentation,embedded in Perl programs: 26. Plain Old Documentation (Programming Perl)
  (see also pod)
dollar sign ($): 1.2.1.2.2. Hashes. (Programming Perl)
  $1, $2, . . . (backreferences): 1.11.3. Discussion (Perl Cookbook)
    6.. Special Variables (Perl Cookbook)
    finding doubled words: 6.16.2. Solution (Perl Cookbook)
  $0 variable: 7.12.3. Discussion (Perl Cookbook)
    18.16. Program: expn and vrfy (Perl Cookbook)
  $* variable (deprecated): 6.. Pattern-Matching Modifiers (Perl Cookbook)
  $& variable: 1.11.3. Discussion (Perl Cookbook)
    6.. Special Variables (Perl Cookbook)
  $#ARRAY variable: 4.3.2. Solution (Perl Cookbook)
  dereferencing with: 4.8.2. Dereferencing (Perl in a Nutshell)
  $^F variable: 12.7.3. Discussion (Perl Cookbook)
  hashes: 5.. Introduction (Perl Cookbook)
  $^I variable: 7.16.3. Discussion (Perl Cookbook)
  in regular text: 2.6.1. Interpolation of Scalar Variables into Strings (Learning Perl)
  in scalar variable names: 2.5. Scalar Variables (Learning Perl)
  indicating end of string: 8.3. Anchors (Learning Perl)
  $^O variable: 7.25. Program: lockarea (Perl Cookbook)
    9.10.3. Discussion (Perl Cookbook)
  preceding hash names: 5.2. Hash Element Access (Learning Perl)
  prototype symbol (scalar): 4.7.5. Prototypes (Perl in a Nutshell)
  signifying scalar variables: 4.2.5. Variables (Perl in a Nutshell)
  special variables: 4.6.2. Regular Expression Syntax (Perl in a Nutshell)
  $VERSION variable (use pragma): 12.1.3. Discussion (Perl Cookbook)
  $^W variable: 12.14.3. Discussion
  (Perl Cookbook)
  $^T ($BASETIME): 3.10. Named Unary and File Test Operators
  (Programming Perl)
  $. ($INPUT_LINE_NUMBER): 3.15. Range Operator
  (Programming Perl)
DOM (Document Object Model): 22.. History of Perl and XML (Perl Cookbook)
  trees: 22.. History of Perl and XML (Perl Cookbook)
    building while validating XML: 22.5.3. Discussion (Perl Cookbook)
    parsing XML into: 22.2.1. Problem (Perl Cookbook)
domain-name databases: B.7.1. Direct System Database Access (Learning Perl)
domain( ) (Net::SMTP): 16.1.2.1. Net::SMTP methods (Perl in a Nutshell)
domains for sockets: 17.. Introduction (Perl Cookbook)
do_push( ) (CGI::Push module): 8.39. CGI::Push (Perl in a Nutshell)
DOS shell window, removing: 15.17.1. Problem (Perl Cookbook)
dosish.h file: 19.1.1. #! and Quoting on Non-Unix Systems (Programming Perl)
dot (.)
  . . and . . . range operators: 6.8.2. Solution (Perl Cookbook)
  as wildcard character: 7.2.1. About Metacharacters (Learning Perl)
    /s modifier and: 9.2.2. Matching Any Character with /s (Learning Perl)
  concatenation operator: 4.5.11.4. String operator (Perl in a Nutshell)
    24.2.1. Time Efficiency (Programming Perl)
  indicating current directory: 13.3. Links and Files (Learning Perl)
  periods in numbers: 2.16.1. Problem (Perl Cookbook)
  Perl debugger command: 6.2. Debugger Commands (Perl in a Nutshell)
  regular expression metacharacter: 4.6.2. Regular Expression Syntax (Perl in a Nutshell)
  .. (range) operator: 4.5.11.1. Range operator (Perl in a Nutshell)
  ... (range) operator: 4.5.11.1. Range operator (Perl in a Nutshell)
  .= (assignment) operator: 4.5.6. Assignment Operators
  (Perl in a Nutshell)
dot and slash (./): 1.4.1. A Simple Program (Learning Perl)
dot-dot (..) indicating parent directory: 13.3. Links and Files (Learning Perl)
double-ended pipe, opening with tied filehandle: 14.4.2. Creative Filehandles (Programming Perl)
double-precision floating-point values: 2.2.1. All Numbers Are the Same Format Internally (Learning Perl)
double-quote context: 2.7.4. Interpolative Context (Programming Perl)
  scalar variables, expanding in: 5.2.3. The s/// Operator (Substitution) (Programming Perl)
double-quote interpolation (see variable interpolation)
double quote ("): 1.. Introduction (Perl Cookbook)
  escaping: 14.10.1. Problem (Perl Cookbook)
double-quoted string literals: 2.3.2. Double-Quoted String Literals (Learning Perl)
  arrays, interpolating into: 3.5. Interpolating Arrays into Strings (Learning Perl)
  hash elements, interpolating into: 5.4.3. Hash Element Interpolation (Learning Perl)
  scalar variables, interpolating into: 2.6.1. Interpolation of Scalar Variables into Strings
  (Learning Perl)
  variable interpolation and: 2.3.2. Double-Quoted String Literals
  (Learning Perl)
double-quoted strings, interpolation and concatenation: 1.5.2. String Operators (Programming Perl)
double quotes: 1.2.1.1. Singularities (Programming Perl)
  strings, use in: 1.2.1.1. Singularities
  (Programming Perl)
  replacement string, use with: 5.2.3. The s/// Operator (Substitution) (Programming Perl)
  translation escape processing: 5.9.2.1. When backslashes happen (Programming Perl)
  arrays and: 6.4. Output to Standard Output (Learning Perl)
  enclosing strings: 2.3.2. Double-Quoted String Literals (Learning Perl)
  omitting from hash keys: 17.4. Unquoted Hash Keys (Learning Perl)
double words, finding: 6.16.1. Problem (Perl Cookbook)
down method: 17.2.3.2. Semaphores (Programming Perl)
downloading
Perl language source code: 2. Installing Perl
(Perl in a Nutshell)
Perl modules source code: 2.2. How Is CPAN Organized?
(Perl in a Nutshell)
  2.4. Getting and Installing Modules
(Perl in a Nutshell)

downloading pattern test program: 7.4. Exercises (Learning Perl)
DProf (see Devel::Dprof module)
dprofpp utility: 6.5. The Perl Profiler (Perl in a Nutshell)
Drivers( ) (Win32::ODBC): 24.1. ODBC Methods and Properties (Perl in a Nutshell)
drop arrow rule: 3.7. Simplifying Nested Element References with Arrows (Learning Perl Objects, References and Modules)
DropCursor( ) (Win32::ODBC): 24.1. ODBC Methods and Properties (Perl in a Nutshell)
du command, sorting output of: 5.17. Program: dutree (Perl Cookbook)
dump( ): 5. Function Reference (Perl in a Nutshell)
  CGI.pm module: 10.7. CGI.pm Reference (Perl in a Nutshell)
  HTML::Parser module: 20.4.3. HTML::Element (Perl in a Nutshell)
Dump( ): 11.15.3. Description (Perl Cookbook)
Dump( ) (Data::Dumper)): 8.50. Data::Dumper (Perl in a Nutshell)
dump function: 29.2.29. dump (Programming Perl)
dump_results( ) (DBI): 12.3. DBI Methods (Perl in a Nutshell)
DumpData( ) (Win32::ODBC): 24.1. ODBC Methods and Properties (Perl in a Nutshell)
Dumper( ) (Data::Dumper): 8.50. Data::Dumper (Perl in a Nutshell)
Dumper subroutine: 5.2. Viewing Complex Data with Data::Dumper (Learning Perl Objects, References and Modules)
DumperX( ) (Data::Dumper)): 8.50. Data::Dumper (Perl in a Nutshell)
dump_names function (ExtUtils::Constant module): 8.69. ExtUtils::Constant (Perl in a Nutshell)
Dumpvalue module: 5.6.3. Discussion (Perl Cookbook)
  8.60. Dumpvalue (Perl in a Nutshell)
  32.1.13. Perl Language Extensions and Internals (Programming Perl)
Dumpxs( ) (Data::Dumper)): 8.50. Data::Dumper (Perl in a Nutshell)
dup( ) (Mail::Folder): 16.2.3. Handle Folders with Mail::Folder (Perl in a Nutshell)
duplicate list elements, extracting: 4.7.1. Problem (Perl Cookbook)
duplicate replaced characters, eliminating: 5.2.4. The tr/// Operator (Transliteration) (Programming Perl)
dutree program: 5.17. Program: dutree (Perl Cookbook)
dweomer: Glossary (Programming Perl)
dwimmer: Glossary (Programming Perl)
DynaLoader: 21.3.2. Creating Extensions (Programming Perl)
DynaLoader module: 8.61. DynaLoader (Perl in a Nutshell)
  10.2. Autoloading (Programming Perl)
  32.1.17. Module Installation Support (Programming Perl)
dynamic linking: 21.3.1. XS and XSUBs (Programming Perl)
  C source code from Perl: 21.3. Extending Perl (Using C from Perl) (Programming Perl)
dynamic loading: B.23. Dynamic Loading (Learning Perl)
dynamic scoping: 10.13.3.3. Using local( ) on parts of aggregates (Perl Cookbook)
  4.2.7. Declarations and Scope (Perl in a Nutshell)
  4.7.4. Private and Local Variables (Perl in a Nutshell)
  4.8. Scoped Declarations (Programming Perl)
  4.8.1. Scoped Variable Declarations (Programming Perl)
  4.8.1. Scoped Variable Declarations (Programming Perl)
  Glossary (Programming Perl)
  local operator, using on global variables: 4.8.4. Dynamically Scoped Variables: local (Programming Perl)
  pattern variables: 5.2. Pattern-Matching Operators (Programming Perl)
    5.2.3. The s/ Operator (Substitution) (Programming Perl)

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