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Index: O

attributes of

Advanced Perl Programming, 7.2.8. Accessor Methods
Advanced Perl Programming, 7.2.1. Attributes
Advanced Perl Programming, 8.1. Efficient Attribute Storage
Perl Cookbook, 13.0. Introduction
Perl Cookbook, 13.3. Managing Instance Data
inheritance and : Perl Cookbook, 13.12. Solving the Data Inheritance Problem

blessing : Programming Perl, 3.2.9. bless

CGI programs and : Learning Perl, 19.8.1. Object-Oriented Programming in Perl

classes : Programming Perl, 5. Packages, Modules, and Object Classes

cloning parent objects : Perl Cookbook, 13.6. Cloning Objects

closures

Advanced Perl Programming, 4.4.3. Closures Versus Objects
Advanced Perl Programming, 20.3.5.4. Objects versus closures
Perl Cookbook, 11.7. Using Closures Instead of Objects

constructors : (see constructors)

delegation : Advanced Perl Programming, 8.2. Delegation

destroying

Advanced Perl Programming, 7.2.7. Object Destruction
Perl Cookbook, 13.0. Introduction
Perl Cookbook, 13.2. Destroying an Object

determining subclass membership : Perl Cookbook, 13.8. Determining Subclass Membership

encapsulating : (see encapsulation)

faster : Advanced Perl Programming, 20.7. A Peek into the Future

functions for : Perl in a Nutshell, 5.1. Perl Functions by Category

identity of : Advanced Perl Programming, 11.2.6. Object Identity

instance vs. class methods : Perl in a Nutshell, 7.4. Object Syntax

IO objects : Advanced Perl Programming, 12.5. IO Objects and Filehandles

managing instance data : Perl Cookbook, 13.3. Managing Instance Data

methods

Perl Cookbook, 13.0. Introduction
Learning Perl, 19.8.1. Object-Oriented Programming in Perl
Programming Perl, 4.3.4. Using Object Methods
Programming Perl, 7.2.11. DirHandle - Supply Object Methods for Directory Handles
for filehandles : Programming Perl, 7.2.33. FileHandle - Supply Object Methods for Filehandles

pointers : Advanced Perl Programming, 20.3.1.3. SVs and object pointers

references : Advanced Perl Programming, 7.2.2. Unique Identity

syntax of : Advanced Perl Programming, B.5. Objects

tied objects : Perl Cookbook, 13.15. Creating Magic Variables with tie

uniquess of : Advanced Perl Programming, 11.2.8. Uniqueness of Objects in Memory

ObjectTemplate library

Advanced Perl Programming, 8.1.1. ObjectTemplate: Attribute Storage Using Arrays
Advanced Perl Programming, 11.1. Adaptor: An Introduction

obscure biblical reference : Learning Perl, 15.5. Transliteration

obtaining Perl

modules

Perl in a Nutshell, 2.2. How Is CPAN Organized?
Perl in a Nutshell, 2.4. Getting and Installing Modules

source code

Perl in a Nutshell, 2. Installing Perl
Programming Perl, How to Get Perl

oct()

Perl Cookbook, 2.16. Converting Between Octal and Hexadecimal
Learning Perl, 2.2.3. Integer Literals
Learning Perl, 2.4.4. Conversion Between Numbers and Strings
Learning Perl on Win32 Systems, 2.2.3. Integer Literals
Learning Perl on Win32 Systems, 2.4.4. Conversion Between Numbers and Strings
Perl in a Nutshell, Chapter 5, Reference: oct
Programming Perl, 3.2.101. oct

octal characters

Perl Cookbook, 2.16. Converting Between Octal and Hexadecimal
Learning Perl, 2.2.3. Integer Literals
Programming Perl, 2.3.2.2. String literals
Programming Perl, 2.4.1.2. The rules of regular expression matching
Programming Perl, 3.2.101. oct
specifying $/ as : Programming Perl, 6.1.2. Switches

OCX controls : Learning Perl on Win32 Systems, 19.1. Introduction to OLE Automation

ODBC module

Advanced Perl Programming, 10.4.2. Win32::ODBC
Learning Perl on Win32 Systems, B.4. Win32 Extensions
Learning Perl on Win32 Systems, 17.6. Win32 Database Interfaces

ODBC specification : Advanced Perl Programming, 10.4. Relational Databases

ODBM_File module

Perl in a Nutshell, 8.116. ODBM_File
Programming Perl, 7.2.1. AnyDBM_File - Provide Framework for Multiple DBMs
Programming Perl, 7.2.47. ODBM_File - Tied Access to ODBM Files

offsets

for m// successes : Programming Perl, 3.2.109. pos
read function : Programming Perl, 3.2.116. read
seek function : Programming Perl, 3.2.132. seek

-offvalue option

Checkbutton widget : Perl in a Nutshell, 18.5. The Checkbutton Widget
Menubutton widget : Perl in a Nutshell, 18.14.1. Menu Item Options

$OFMT ($#) variable

Learning Perl, 3.4.2. Array Element Access
Perl in a Nutshell, 4.4.1. Global Special Variables
Programming Perl, 2.3.4. List Values and Arrays
Programming Perl, 2.9.3. Global Special Variables
Programming Perl, 6.4.2.2. a2p

$OFS ($,) variable

Perl in a Nutshell, 4.4.1. Global Special Variables
Programming Perl, 2.9.3. Global Special Variables
Programming Perl, 7.2.13. English - Use English or awk Names for Punctuation Variables

-ok option (perlbug) : Perl in a Nutshell, 6.6. The perlbug Program

-okay option (perlbug) : Perl in a Nutshell, 6.6. The perlbug Program

OLE automation : Perl in a Nutshell, 19.18. OLE Automation

OLE module

Learning Perl on Win32 Systems, A.18. Chapter 19, OLE Automation
Learning Perl on Win32 Systems, B.4. Win32 Extensions
Learning Perl on Win32 Systems, 19.2. Creating Automation Objects

OLEDB : Learning Perl on Win32 Systems, 19.3.1. Data-Access Objects

one-liners : Programming Perl, 1.3.1. How to Do It

one-to-many associations : Advanced Perl Programming, 11.2.7. Object Associations

-onvalue option

Checkbutton widget : Perl in a Nutshell, 18.5. The Checkbutton Widget
Menubutton widget : Perl in a Nutshell, 18.14.1. Menu Item Options

OOP : (see object-oriented programming (OOP))

Opcode module : Perl in a Nutshell, 8.117. Opcode

opcodes : Advanced Perl Programming, 20.2.2. Translator

open()

(see also processes)

Advanced Perl Programming, 3.4. Filehandles, Directory Handles, and Formats

Perl Cookbook, 7.0. Introduction

Perl Cookbook, 7.1. Opening a File

Perl Cookbook, 16.10. Communicating Between Related Processes

Learning Perl, 1.5.10. Moving the Secret Word List into a Separate File

Learning Perl, 1.5.17. The Final Programs

Learning Perl, 10.2. Opening and Closing a Filehandle

Learning Perl, 19.8.2. Objects in CGI.pm

Learning Perl on Win32 Systems, 1.6.10. Moving the Secret Word List into a Separate File

Learning Perl on Win32 Systems, 1.6.17. The Final Programs

Learning Perl on Win32 Systems, 10.2. Opening and Closing a Filehandle

Perl in a Nutshell, Chapter 5, Reference: open

Perl in a Nutshell, 4.9. Filehandles

Programming Perl, 3.2.102. open

Programming Perl, 6.2.2.1. Anonymous pipes

Programming Perl, 7.2.33. FileHandle - Supply Object Methods for Filehandles

$. and : Programming Perl, 3.2.18. close

caching open filehandles : Perl Cookbook, 7.17. Caching Open Output Filehandles

document object (PerlScript) : Perl in a Nutshell, 20.1.1.1. Document methods

examples of

Learning Perl, A.9. Chapter 10, Filehandles and File Tests
Learning Perl, 1.5.17. The Final Programs
Learning Perl, 11.3. Invoking a Format
Learning Perl on Win32 Systems, A.9. Chapter 10, Filehandles and File Tests
Learning Perl on Win32 Systems, 11.3. Invoking a Format

fileno function and : Programming Perl, 3.2.38. fileno

filtering output : Perl Cookbook, 16.5. Filtering Your Own Output

Mail::Folder module : Perl in a Nutshell, Chapter 14, Reference: open

Mail::Mailer module : Perl in a Nutshell, Chapter 14, Reference: open

Mail::Send module

Perl in a Nutshell, Chapter 14, Reference: open
Perl in a Nutshell, 14.2.2. Better Header Control with Mail::Send

plus sign and : Learning Perl, 17.4. Fixed-Length Random Access Databases

reading from other programs : Perl Cookbook, 16.4. Reading or Writing to Another Program

strange filenames with : Perl Cookbook, 7.2. Opening Files with Unusual Filenames

vertical bar in

Learning Perl, 1.5.12. Warning Someone When Things Go Astray
Learning Perl, 14.3. Using Processes as Filehandles
Learning Perl on Win32 Systems, 1.6.12. Warning Someone When Things Go Astray
Learning Perl on Win32 Systems, 14.3. Using Processes as Filehandles

Win32::Mutex module : Perl in a Nutshell, 19.9. Win32::Mutex

Win32::Semaphore module : Perl in a Nutshell, 19.14. Win32::Semaphore

Open()

Learning Perl on Win32 Systems, 16.5. Opening and Reading Registry Values
Perl in a Nutshell, 19.13. Win32::Registry

open, magic : (see magic open)

open2() : Programming Perl, 7.2.39. IPC::Open2 - Open a Process for Both Reading and Writing

Open2, Open3 library modules : Programming Perl, 6.2.2.3. Bidirectional communication

open3() : Programming Perl, 7.2.40. IPC::Open3 - Open a Process for Reading, Writing, and Error Handling

opendir()

Advanced Perl Programming, 3.4. Filehandles, Directory Handles, and Formats
Perl Cookbook, 9.0. Introduction
Perl Cookbook, 9.5. Processing All Files in a Directory
Learning Perl, 12.4. Opening and Closing a Directory Handle
Learning Perl on Win32 Systems, 12.5. Reading a Directory Handle
Perl in a Nutshell, Chapter 5, Reference: opendir
Programming Perl, 3.2.103. opendir
Programming Perl, 7.2.11. DirHandle - Supply Object Methods for Directory Handles
examples of : Learning Perl, A.11. Chapter 12, Directory Access
globbing filenames : Perl Cookbook, 9.6. Globbing, or Getting a List of Filenames Matching a Pattern

opening

DBM database : Learning Perl, 17.2. Opening and Closing DBM Hashes

file descriptors : Perl Cookbook, 7.19. Opening and Closing File Descriptors by Number

files

Perl Cookbook, 7.1. Opening a File
Learning Perl, 10.2. Opening and Closing a Filehandle
FileCache module : Programming Perl, 7.2.32. FileCache - Keep More Files Open Than the System Permits
via low-level system call : Programming Perl, 3.2.165. sysopen

Registry values : Learning Perl on Win32 Systems, 16.5. Opening and Reading Registry Values

sockets : Programming Perl, 3.2.151. socket

openlog() : Programming Perl, 7.2.63. Sys::Syslog - Perl Interface to UNIX syslog(3) Calls

OpenRequest() (Win32::Internet) : Perl in a Nutshell, Chapter 19, Reference: OpenRequest

OpenURL() (Win32::Internet) : Perl in a Nutshell, Chapter 19, Reference: OpenURL

operands, defined : Learning Perl, 2.4. Scalar Operators

operating system : Programming Perl, Perl in a Nutshell

operator mask : Programming Perl, 7.2.51. Safe - Create Safe Namespaces for Evaluating Perl Code

operators

Learning Perl on Win32 Systems, 2.4. Scalar Operators

Perl in a Nutshell, 4.5. Operators

Programming Perl, 1.5. Operators

Programming Perl, 2.5. Operators

addition : Learning Perl, 2.4.1. Operators for Numbers

assignment : Learning Perl, 2.6. Scalar Operators and Functions

for associative arrays (hashes) : Learning Perl, 5.4. Hash Functions

associativity

Learning Perl, 2.4.3. Operator Precedence and Associativity
Programming Perl, 2.5. Operators

autodecrement : Learning Perl, 2.6.2. Autoincrement and Autodecrement

autogeneration : Programming Perl, 7.2.48.7. Autogeneration

autoincrement : Learning Perl, 2.6.2. Autoincrement and Autodecrement

definition of : Learning Perl, 2.4. Scalar Operators

division : Learning Perl, 2.4.1. Operators for Numbers

logical comparison : Learning Perl, 2.4.1. Operators for Numbers

multiplication : Learning Perl, 2.4.1. Operators for Numbers

overloading

Perl Cookbook, 13.14. Overloading Operators
Programming Perl, 7.2.48. overload - Overload Perl's Mathematical Operations

precedence of

Learning Perl, 2.4.3. Operator Precedence and Associativity
Programming Perl, 2.5. Operators

for scalar variables : Learning Perl, 2.6. Scalar Operators and Functions

string operators : Learning Perl, 2.4.2. Operators for Strings

subtraction : Learning Perl, 2.4.1. Operators for Numbers

undef and : Learning Perl, 2.9. The Undefined Value

ops module : Perl in a Nutshell, 8.118. ops

optimizing Perl

Advanced Perl Programming, 20.2.2.2. Compilation and code generation stages
Programming Perl, 8.3. Efficiency

Optionmenu widget (Perl/Tk) : Perl in a Nutshell, 18.16. The Optionmenu Widget

options : (see switches, Perl command-line)

-options option (Optionmenu) : Perl in a Nutshell, 18.16. The Optionmenu Widget

OR (^) operator

Perl in a Nutshell, 4.5.10. Bitwise Operators
Programming Perl, 2.5.13. Bitwise Operators
Programming Perl, 2.5.20. Logical and, or, not, and xor
Programming Perl, 8.2.3. Awk Traps
Programming Perl, 8.4. Programming with Style

OR (|) operator

Perl in a Nutshell, 4.5.10. Bitwise Operators
Programming Perl, 2.5.13. Bitwise Operators

OR (||) operator

Perl Cookbook, 1.2. Establishing a Default Value
Perl in a Nutshell, 4.5.9. Logical Operators
Programming Perl, 2.5.14. C-style Logical (Short Circuit) Operators

OR functionality in regular expressions : Perl Cookbook, 6.17. Expressing AND, OR, and NOT in a Single Pattern

Oracle module : Advanced Perl Programming, 10.4.1. DBI (Database Interface)

oraperl

Advanced Perl Programming, 10.4.1. DBI (Database Interface)
Perl in a Nutshell, 12.2. Design of DBI

ord()

Perl Cookbook, 1.4. Converting Between ASCII Characters and Values
Learning Perl, 16.2. Packing and Unpacking Binary Data
Perl in a Nutshell, Chapter 5, Reference: ord
Programming Perl, 3.2.104. ord

order : (see precedence)

oreobounce program (example) : Perl Cookbook, 19.8. Redirecting to a Different Location

-orient option

Scale widget : Perl in a Nutshell, 18.13. The Scale Widget
Scrollbar widget : Perl in a Nutshell, 18.9. The Scrollbar Widget

$ORS ($\) 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

orthogonal (transparent) persistence

Advanced Perl Programming, 11. Implementing Object Persistence
Advanced Perl Programming, 11.2.1. Design Goals

Orwant, Jon : Perl in a Nutshell, 1.4.7. The Perl Journal

OS/2, Perl under : Learning Perl, 1.3. Availability

$OS_ERROR ($!) variable

Perl in a Nutshell, 4.4.1. Global Special Variables
Programming Perl, 2.9.3. Global Special Variables
Programming Perl, 7.2.13. English - Use English or awk Names for Punctuation Variables

os_snipe program (example) : Perl Cookbook, 19.8. Redirecting to a Different Location

$OSNAME ($^O) variable

Perl in a Nutshell, 4.4.1. Global Special Variables
Programming Perl, 2.9.3. Global Special Variables
Programming Perl, 7.2.13. English - Use English or awk Names for Punctuation Variables

Ousterhout, John : Advanced Perl Programming, The Case for Scripting

output

(see also filehandles)
(see also input)
Perl in a Nutshell, 5.1. Perl Functions by Category
Programming Perl, 1.4. Filehandles
checking file descriptors for : Programming Perl, 3.2.135. select (ready file descriptors)
controlling decimal places : Perl Cookbook, 13.14. Overloading Operators
controlling for other programs : Perl Cookbook, 16.8. Controlling Input and Output of Another Program
field separator : (see $ variables, $, variable)
filtering : Perl Cookbook, 16.5. Filtering Your Own Output
flushing : Perl Cookbook, 7.12. Flushing Output
formats for : Perl in a Nutshell, 4.10. Formats
gathering from programs : Perl Cookbook, 16.1. Gathering Output from a Program
pipes : Programming Perl, 6.2.2. Pipes
random access I/O : Perl Cookbook, 8.12. Using Random-Access I/O
record separator : (see $ variables, $\ variable)
selecting filehandles for : Programming Perl, 3.2.134. select (output filehandle)
test script : Programming Perl, 7.2.66.1. The test script output
writing to other programs : Perl Cookbook, 16.4. Reading or Writing to Another Program

output() : Perl Cookbook, 5.16. Program: dutree

$OUTPUT_AUTOFLUSH ($|) variable

Perl Cookbook, 7.0. Introduction
Perl Cookbook, 7.12. Flushing Output
Perl in a Nutshell, 4.4.6. Filehandle Special Variables
Programming Perl, 2.8.1. Format Variables
Programming Perl, 2.9.2. Per-Filehandle Special Variables
Programming Perl, 7.2.13. English - Use English or awk Names for Punctuation Variables

$OUTPUT_FIELD_SEPARATOR ($,) variable

Perl in a Nutshell, 4.4.1. Global Special Variables
Programming Perl, 2.9.3. Global Special Variables
Programming Perl, 7.2.13. English - Use English or awk Names for Punctuation Variables

$OUTPUT_RECORD_SEPARATOR ($\) 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

OutputCP() (Win32::Console) : Perl in a Nutshell, Chapter 19, Reference: OutputCP

=over command (pod) : Perl in a Nutshell, Chapter 4, Reference: =over

overload module

Perl in a Nutshell, 8.119. overload
Programming Perl, 7.2.48. overload - Overload Perl's Mathematical Operations

Overloaded() : Programming Perl, 7.2.48.9. Public functions

overloading

Perl Cookbook, 13.14. Overloading Operators
Programming Perl, 2.3.3.1. Scalar and list context
Programming Perl, 7.2.48.8. Run-time overloading

overridedirect() (Frame widget) : Perl in a Nutshell, 18.18.1. Toplevel Methods

overriding

base class methods

Advanced Perl Programming, 7.2.6.1. Overriding base classes
Programming Perl, 5.5.6. Overriding Base Class Methods

functions

Perl Cookbook, 12.11. Overriding Built-In Functions
Programming Perl, 5.2.2. Overriding Built-in Functions

MakeMaker methods : Programming Perl, 7.2.18.10. Overriding MakeMaker methods

methods : Perl Cookbook, 13.10. Accessing Overridden Methods

signal handlers : Perl Cookbook, 16.16. Temporarily Overriding a Signal Handler

overview_fmt() (Net::NNTP) : Perl in a Nutshell, Chapter 15, Reference: overview_fmt

ownership, file

Learning Perl, 13.6. Modifying Ownership
Programming Perl, 3.2.15. chown

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