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O

O command (debugger) : Debugger Commands
-O file test operator : Named Unary and File Test Operators
-o file test operator : Named Unary and File Test Operators
/o modifier
Pattern-Matching Operators
object (see constructors)
classes : Packages, Modules, and Object Classes
constructors (see constructors)
methods : Using Object Methods
object methods : DirHandle--Supply Object Methods for Directory Handles
for filehandles : FileHandle--Supply Object Methods for Filehandles
object-oriented programming
Brief Refresher on Object-Oriented Programming
Object-Oriented Scaling Tips
objects
Objects
Class Context and the Object
blessing : bless
obtaining Perl : How to Get Perl
oct function : oct
octal characters : String literals
octal numbers
The rules of regular expression matching
oct
specifying $/ as : Switches
ODBM_File module
AnyDBM_File--Provide Framework for Multiple DBMs
ODBM_File--Tied Access to ODBM Files
offsets
for m// successes : pos
read function and : read
seek function : seek
$OFMT (see $# variable)
a2p
$OFS (see $, variable)
one-liners : How to Do It
OOP (object-oriented programming)
Brief Refresher on Object-Oriented Programming
Object-Oriented Scaling Tips
open function
open
Anonymous pipes
fileno function and : fileno
$. and : close
open( ) : FileHandle--Supply Object Methods for Filehandles
open2( ) : IPC::Open2--Open a Process for Both Reading and Writing
Open2, Open3 library modules : Bidirectional communication
open3( ) : IPC::Open3--Open a Process for Reading, Writing, and Error Handling
opendir function
opendir
DirHandle--Supply Object Methods for Directory Handles
opening
files via low-level system call : sysopen
sockets : socket
opening files
FileCache module : FileCache--Keep More Files Open Than the System Permits
openlog( ) : Sys::Syslog--Perl Interface to UNIX syslog(3) Calls
operating system : Perl in a Nutshell
operator mask : Safe--Create Safe Namespaces for Evaluating Perl Code
operators
Operators
Operators
associativity of : Operators
autogeneration : Autogeneration
overloading : overload--Overload Perl's Mathematical Operations
precedence of : Operators
optimizing
performance and : Efficiency
options (see switches, Perl command-line)
OR (^) operator (see XOR operator)
Awk Traps
OR (|) operator : Bitwise Operators
OR (||) operator : C-style Logical (Short Circuit) Operators
or operator
Logical and, or, not, and xor
Programming with Style
ord function : ord
order (see precedence)
of function precedence : Functions
$ORS (see $\ variable)
$OSNAME (see $^O variable)
$OS_ERROR (see $! variable)
output (see also filehandles)
checking file descriptors for : select (ready file descriptors)
field separator (see $, variable)
pipes : Pipes
record separator (see $\ variable)
selecting filehandles for : select (output filehandle)
test script : The test script output
$OUTPUT_AUTOFLUSH (see $| variable)
$OUTPUT_FIELD_SEPARATOR (see $, variable)
$OUTPUT_RECORD_SEPARATOR (see $\ variable)
overload module : overload--Overload Perl's Mathematical Operations
overloaded
functions : Scalar and list context
Overloaded( ) : Public functions
overloading
run-time : Run-time overloading
overriding
base class methods : Overriding Base Class Methods
MakeMaker methods : Overriding MakeMaker methods
overriding functions : Overriding Built-in Functions
ownership, file : chown


Symbols | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
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