Index: D

• daemon servers
• • Program: sigrand
  • Making a Daemon Server
• data structures
• • binary trees : Program: Binary Trees
  • copying : Copying Data Structures
  • printing : Printing Data Structures
  • storing to disk : Storing Data Structures to Disk
  • transparently persistent : Transparently Persistent Data Structures
• __DATA__ tokens : Storing Files Inside Your Program Text
• data types
• • circular data structures : Coping with Circular Data Structures
  • classes as structs : Using Classes as Structs
• data, relationships between
• • (see also variables)
  • Representing Relationships Between Data
• Data::Dumper module : Printing Data Structures
• database access : Introduction
• • converting between DBM files : Converting Between DBM Files
  • emptying DBM files : Emptying a DBM File
  • ggh program : Program: ggh&nbsp- Grep Netscape Global History
  • locking DBM files : Locking DBM Files
  • making DBM files : Making and Using a DBM File
  • merging DBM files : Merging DBM Files
  • persistent data : Persistent Data
  • sorting large DBM files : Sorting Large DBM Files
  • SQL queries
  • • Executing an SQL Command Using DBI and DBD
    • Formatting Lists and Tables with HTML Shortcuts
  • storing complex data in DBM files : Storing Complex Data in a DBM File
  • text files as database arrays : Treating a Text File as a Database Array
• database queries : Formatting Lists and Tables with HTML Shortcuts
• datagram sockets
• • Introduction
  • Setting Up a UDP Client
• date and time : Introduction
• • arithmetic with : Adding to or Subtracting from a Date
  • converting to/from Epoch seconds : Converting DMYHMS to Epoch Seconds
  • Date::DateCalc module
  • • Introduction
    • Adding to or Subtracting from a Date
    • Difference of Two Dates
    • Day in a Week/Month/Year or Week Number
  • Date::Manip module
  • • Introduction
    • Parsing Dates and Times from Strings
    • Printing a Date
    • Program: hopdelta
  • days, calculating : Day in a Week/Month/Year or Week Number
  • file access timestamps : Getting and Setting Timestamps
  • high-resolution timers : High-Resolution Timers
  • hopdelta program : Program: hopdelta
  • parsing information from strings : Parsing Dates and Times from Strings
  • printing : Printing a Date
  • sleeps : Short Sleeps
  • sorting mail by (example) : Program: Sorting Your Mail
  • Time::gmtime modules
  • • Introduction
    • Converting Epoch Seconds to DMYHMS
  • Time::HiRes module : High-Resolution Timers
  • Time::Local module
  • • Introduction
    • Converting DMYHMS to Epoch Seconds
  • Time::localtime : Introduction
  • Time::timelocal : Converting Epoch Seconds to DMYHMS
  • Time::tm module : Introduction
  • timing out operations : Timing Out an Operation
  • today's : Finding Today's Date
  • years : Introduction
• date_difference( ) : Difference of Two Dates
• date_time_difference( ) : Difference of Two Dates
• DateCalc( ) : Program: hopdelta
• dates_difference( )
• • Difference of Two Dates
  • Day in a Week/Month/Year or Week Number
• datesort program (example) : Program: Sorting Your Mail
• day_of_week( ) : Day in a Week/Month/Year or Week Number
• days : (see date and time)
• db2gdbm program (example) : Converting Between DBM Files
• DB_File module : Transparently Persistent Data Structures
• • sorting large DBM files : Sorting Large DBM Files
  • text files as database arrays : Treating a Text File as a Database Array
• DB_RECNO access method : Reading a Particular Line in a File
• DBD module : Executing an SQL Command Using DBI and DBD
• DBI module
• • Executing an SQL Command Using DBI and DBD
  • Formatting Lists and Tables with HTML Shortcuts
  • Creating HTML Templates
• dblockdemo program (example) : Locking DBM Files
• DBM files
• • complex data in : Storing Complex Data in a DBM File
  • converting between : Converting Between DBM Files
  • emptying : Emptying a DBM File
  • GDBM files
  • • Introduction
    • Converting Between DBM Files
  • locking : Locking DBM Files
  • making and using : Making and Using a DBM File
  • merging : Merging DBM Files
  • NDBM files : Introduction
  • sorting : Sorting Large DBM Files
• DBM libraries : Introduction
• dbmclose( ) : Making and Using a DBM File
• dbmopen( )
• • Introduction
  • Making and Using a DBM File
• dbusers program (example) : Executing an SQL Command Using DBI and DBD
• dclone( ) : Copying Data Structures
• debugging
• • CGI script errors : Introduction
  • • 500 Server Error : Fixing a 500 Server Error
  • HTTP exchanges : Debugging the Raw HTTP Exchange
• decimal numbers, converting
• • binary numbers : Converting Between Binary and Decimal
  • octal and hexadecimal numbers : Converting Between Octal and Hexadecimal
• deep copies : Copying Data Structures
• default string values : Establishing a Default Value
• defined operator : Establishing a Default Value
• definedness
• • Introduction
  • Establishing a Default Value
• deg2rad( ) (example) : Doing Trigonometry in Degrees, not Radians
• degrees vs. radians : Doing Trigonometry in Degrees, not Radians
• delaying module loading : Delaying use Until Run Time
• delete( ) : Deleting from a Hash
• • multiple hash key values : Hashes with Multiple Values Per Key
  • Tie::IxHash module and : Retrieving from a Hash in Insertion Order
• deleting
• • clearing the screen : Clearing the Screen
  • directories and their contents : Removing a Directory and Its Contents
  • DOS shell window : Removing the DOS Shell Window with Windows Perl/Tk
  • emptying DBM files : Emptying a DBM File
  • files : Deleting a File
  • hash elements : Deleting from a Hash
  • HTML tags from strings : Extracting or Removing HTML Tags
  • last line of files : Removing the Last Line of a File
  • selected subroutine return values : Skipping Selected Return Values
  • whitespace at string ends : Trimming Blanks from the Ends of a String
• dequote( ) : Indenting Here Documents
• dereferencing : (see references)
• derived classes : Introduction
• destructors
• • Introduction
  • Destroying an Object
• deterministic finite automata : Introduction
• DFA (deterministic finite automata) : Introduction
• dialog boxes with Tk toolkit : Creating Dialog Boxes with Tk
• DialogBox widget (Tk) : Creating Dialog Boxes with Tk
• diamond (< >) operator
• • Introduction
  • Writing a Filter
  • Introduction
  • Introduction
• die function : Handling Exceptions
• __DIE__ signal : Installing a Signal Handler
• differences of lists : Finding Elements in One Array but Not Another
• directories : Introduction
• • copying or moving files : Copying or Moving a File
  • deleting : Removing a Directory and Its Contents
  • deleting files in : Deleting a File
  • of modules : Keeping Your Own Module Directory
  • multiple names for same file : Recognizing Two Names for the Same File
  • parsing filenames : Splitting a Filename into Its Component Parts
  • processing all files in
  • • Processing All Files in a Directory
    • Processing All Files in a Directory Recursively
  • recursively duplicating : Program: symirror
  • renaming files : Renaming Files
  • sorting contents of
  • • Introduction
    • Program: lst
  • timestamps : Getting and Setting Timestamps
• directory handles : Processing All Files in a Directory
• dirname( ) : Splitting a Filename into Its Component Parts
• disk usage, library : Introduction
• DMYHMS values : (see date and time)
• DNS lookups : Simple DNS Lookups
• do( ) : Reading Configuration Files
• documentation conventions : Conventions Used in this tutorial
• domains
• • getting information on : Using Whois to Retrieve Information from the InterNIC
  • for sockets : Introduction
• Dominus, Mark-Jason : Program: permute
• DOS shell window, removing : Removing the DOS Shell Window with Windows Perl/Tk
• dots (.) in numbers : Putting Commas in Numbers
• double quotes : Introduction
• • qq( ) : Specifying a List In Your Program
• drivelock program (example) : Program: netlock
• du command, sorting output of : Program: dutree
• dummyhttpd program (example) : Debugging the Raw HTTP Exchange
• duplicate
• • list elements, extracting : Extracting Unique Elements from a List
  • words, finding : Detecting Duplicate Words
• dutree program (example) : Program: dutree
• dutree_orig program (example) : Program: dutree
• dynamic scoping : Saving Global Values