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Index: D

circular data structures : 13.13. Coping with Circular Data Structures
classes as structs : 13.5. Using Classes as Structs

data, relationships between

(see also variables)
5.15. Representing Relationships Between Data

Data::Dumper module : 11.11. Printing Data Structures

database access : 14.0. Introduction

converting between DBM files : 14.3. Converting Between DBM Files

emptying DBM files : 14.2. Emptying a DBM File

ggh program : 14.11. Program: ggh - Grep Netscape Global History

locking DBM files : 14.5. Locking DBM Files

making DBM files : 14.1. Making and Using a DBM File

merging DBM files : 14.4. Merging DBM Files

persistent data : 14.9. Persistent Data

sorting large DBM files : 14.6. Sorting Large DBM Files

SQL queries

14.10. Executing an SQL Command Using DBI and DBD
19.7. Formatting Lists and Tables with HTML Shortcuts

storing complex data in DBM files : 14.8. Storing Complex Data in a DBM File

text files as database arrays : 14.7. Treating a Text File as a Database Array

database queries : 19.7. Formatting Lists and Tables with HTML Shortcuts

datagram sockets

17.0. Introduction
17.4. Setting Up a UDP Client

date and time : 3.0. Introduction

arithmetic with : 3.4. Adding to or Subtracting from a Date

converting to/from Epoch seconds : 3.2. Converting DMYHMS to Epoch Seconds

Date::DateCalc module

3.0. Introduction
3.4. Adding to or Subtracting from a Date
3.5. Difference of Two Dates
3.6. Day in a Week/Month/Year or Week Number

Date::Manip module

3.0. Introduction
3.7. Parsing Dates and Times from Strings
3.8. Printing a Date
3.11. Program: hopdelta

days, calculating : 3.6. Day in a Week/Month/Year or Week Number

file access timestamps : 9.1. Getting and Setting Timestamps

high-resolution timers : 3.9. High-Resolution Timers

hopdelta program : 3.11. Program: hopdelta

parsing information from strings : 3.7. Parsing Dates and Times from Strings

printing : 3.8. Printing a Date

sleeps : 3.10. Short Sleeps

sorting mail by (example) : 10.17. Program: Sorting Your Mail

Time::gmtime modules

3.0. Introduction
3.3. Converting Epoch Seconds to DMYHMS

Time::HiRes module : 3.9. High-Resolution Timers

Time::Local module

3.0. Introduction
3.2. Converting DMYHMS to Epoch Seconds

Time::localtime : 3.0. Introduction

Time::timelocal : 3.3. Converting Epoch Seconds to DMYHMS

Time::tm module : 3.0. Introduction

timing out operations : 16.21. Timing Out an Operation

today's : 3.1. Finding Today's Date

years : 3.0. Introduction

date_difference( ) : 3.5. Difference of Two Dates

date_time_difference( ) : 3.5. Difference of Two Dates

DateCalc( ) : 3.11. Program: hopdelta

dates_difference( )

3.5. Difference of Two Dates
3.6. Day in a Week/Month/Year or Week Number

datesort program (example) : 10.17. Program: Sorting Your Mail

day_of_week( ) : 3.6. Day in a Week/Month/Year or Week Number

days : (see date and time)

db2gdbm program (example) : 14.3. Converting Between DBM Files

DB_File module : 11.14. Transparently Persistent Data Structures

sorting large DBM files : 14.6. Sorting Large DBM Files
text files as database arrays : 14.7. Treating a Text File as a Database Array

DB_RECNO access method : 8.8. Reading a Particular Line in a File

DBD module : 14.10. Executing an SQL Command Using DBI and DBD

DBI module

14.10. Executing an SQL Command Using DBI and DBD
19.7. Formatting Lists and Tables with HTML Shortcuts
20.9. Creating HTML Templates

dblockdemo program (example) : 14.5. Locking DBM Files

DBM files

complex data in : 14.8. Storing Complex Data in a DBM File

converting between : 14.3. Converting Between DBM Files

emptying : 14.2. Emptying a DBM File

GDBM files

14.0. Introduction
14.3. Converting Between DBM Files

locking : 14.5. Locking DBM Files

making and using : 14.1. Making and Using a DBM File

merging : 14.4. Merging DBM Files

NDBM files : 14.0. Introduction

sorting : 14.6. Sorting Large DBM Files

DBM libraries : 14.0. Introduction

dbmclose( ) : 14.1. Making and Using a DBM File

dbmopen( )

14.0. Introduction
14.1. Making and Using a DBM File

dbusers program (example) : 14.10. Executing an SQL Command Using DBI and DBD

dclone( ) : 11.12. Copying Data Structures

debugging

CGI script errors : 19.0. Introduction

500 Server Error : 19.3. Fixing a 500 Server Error

HTTP exchanges : 19.9. Debugging the Raw HTTP Exchange

decimal numbers, converting

binary numbers : 2.4. Converting Between Binary and Decimal
octal and hexadecimal numbers : 2.16. Converting Between Octal and Hexadecimal

deep copies : 11.12. Copying Data Structures

default string values : 1.2. Establishing a Default Value

defined operator : 1.2. Establishing a Default Value

definedness

1.0. Introduction
1.2. Establishing a Default Value

deg2rad( ) (example) : 2.11. Doing Trigonometry in Degrees, not Radians

degrees vs. radians : 2.11. Doing Trigonometry in Degrees, not Radians

delaying module loading : 12.3. Delaying use Until Run Time

delete( ) : 5.3. Deleting from a Hash

multiple hash key values : 5.7. Hashes with Multiple Values Per Key
Tie::IxHash module and : 5.6. Retrieving from a Hash in Insertion Order

deleting

clearing the screen : 15.3. Clearing the Screen
directories and their contents : 9.8. Removing a Directory and Its Contents
DOS shell window : 15.17. Removing the DOS Shell Window with Windows Perl/Tk
emptying DBM files : 14.2. Emptying a DBM File
files : 9.2. Deleting a File
hash elements : 5.3. Deleting from a Hash
HTML tags from strings : 20.6. Extracting or Removing HTML Tags
last line of files : 8.10. Removing the Last Line of a File
selected subroutine return values : 10.8. Skipping Selected Return Values
whitespace at string ends : 1.14. Trimming Blanks from the Ends of a String

dequote( ) : 1.11. Indenting Here Documents

dereferencing : (see references)

derived classes : 13.0. Introduction

destructors

13.0. Introduction
13.2. Destroying an Object

deterministic finite automata : 6.0. Introduction

DFA (deterministic finite automata) : 6.0. Introduction

dialog boxes with Tk toolkit : 15.15. Creating Dialog Boxes with Tk

DialogBox widget (Tk) : 15.15. Creating Dialog Boxes with Tk

diamond (< >) operator

7.0. Introduction
7.7. Writing a Filter
8.0. Introduction
17.0. Introduction

die function : 10.12. Handling Exceptions

__DIE__ signal : 16.15. Installing a Signal Handler

differences of lists : 4.7. Finding Elements in One Array but Not Another

directories : 9.0. Introduction

copying or moving files : 9.3. Copying or Moving a File

deleting : 9.8. Removing a Directory and Its Contents

deleting files in : 9.2. Deleting a File

of modules : 12.7. Keeping Your Own Module Directory

multiple names for same file : 9.4. Recognizing Two Names for the Same File

parsing filenames : 9.10. Splitting a Filename into Its Component Parts

processing all files in

9.5. Processing All Files in a Directory
9.7. Processing All Files in a Directory Recursively

recursively duplicating : 9.11. Program: symirror

renaming files : 9.9. Renaming Files

sorting contents of

9.0. Introduction
9.12. Program: lst

timestamps : 9.1. Getting and Setting Timestamps

directory handles : 9.5. Processing All Files in a Directory

dirname( ) : 9.10. Splitting a Filename into Its Component Parts

disk usage, library : 14.0. Introduction

DMYHMS values : (see date and time)

DNS lookups : 18.1. Simple DNS Lookups

do( ) : 8.16. Reading Configuration Files

documentation conventions : Conventions Used in This Book

domains

getting information on : 18.8. Using Whois to Retrieve Information from the InterNIC
for sockets : 17.0. Introduction

Dominus, Mark-Jason : 4.19. Program: permute

DOS shell window, removing : 15.17. Removing the DOS Shell Window with Windows Perl/Tk

dots (.) in numbers : 2.17. Putting Commas in Numbers

double quotes : 1.0. Introduction

qq( ) : 4.1. Specifying a List In Your Program

drivelock program (example) : 7.21. Program: netlock

du command, sorting output of : 5.16. Program: dutree

dummyhttpd program (example) : 19.9. Debugging the Raw HTTP Exchange

duplicate

list elements, extracting : 4.6. Extracting Unique Elements from a List
words, finding : 6.16. Detecting Duplicate Words

dutree program (example) : 5.16. Program: dutree

dutree_orig program (example) : 5.16. Program: dutree

dynamic scoping : 10.13. Saving Global Values

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