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Index: U

u command (CPAN.pm) : Chapter 2, Reference: u

-u file test operator : 4.5.8. File Test Operators

-U option (dprofpp) : 6.5. The Perl Profiler

-u option (dprofpp) : 6.5. The Perl Profiler

-u option (perl) : 3.2. Command-Line Options

-U option (perl) : 3.2. Command-Line Options

uc() : Chapter 5, Reference: uc

ucfirst() : Chapter 5, Reference: ucfirst

$UID ($<) variable : 4.4.1. Global Special Variables

uidl() (Net::POP3) : Chapter 14, Reference: uidl

umask() : Chapter 5, Reference: umask

unary operators : 4.5.2. Unary Operators

uncompressing Perl source code

2.3.1. Installing on Unix
2.3.2.2. Standard Perl distribution

undef value : 4.2.4. Variables

undef() : Chapter 5, Reference: undef

undelete_message() (Mail::Folder) : Chapter 14, Reference: undelete_message

-underline option (widgets) : 18.3. Common Widget Configuration Options

underscore (_)

filehandle : 4.4.3. Global Special Filehandles
improving number legibility : 4.2.1. Numbers

undump program : 3.2. Command-Line Options

unescape_from() (Mail::Internet) : Chapter 14, Reference: unescape_from

unique_name() (Net::FTP) : Chapter 16, Reference: unique_name

UNIVERSAL module : 8.163. UNIVERSAL

Unix-domain sockets : 13. Sockets

Unix systems

#! (shebang) line : 3. The Perl Interpreter
command processing : 3.1. Command Processing
installing Perl on : 2.3.1. Installing on Unix

unless modifier : 4.3.1.4. Modifiers

unless statement : 4.3.1. Conditionals and Loops

unlink() : Chapter 5, Reference: unlink

unmark() (News::Newsrc) : Chapter 15, Reference: unmark

unmark_list() (News::Newsrc) : Chapter 15, Reference: unmark_list

unmark_range() (News::Newsrc) : Chapter 15, Reference: unmark_range

unmarked_articles() (News::Newsrc) : Chapter 15, Reference: unmarked_articles

unpack() : Chapter 5, Reference: unpack

unpack_sockaddr_in() (Socket) : Chapter 13, Reference: unpack_sockaddr_in

unpack_sockaddr_un() (Socket) : Chapter 13, Reference: unpack_sockaddr_un

unpacking Perl source code

2.3.1. Installing on Unix
2.3.2.2. Standard Perl distribution

unpost() (Menu widget) : 18.15.2. Menu Methods

unsafe operations, allowing : 3.2. Command-Line Options

unshift() : Chapter 5, Reference: unshift

unsub_groups() (News::Newsrc) : Chapter 15, Reference: unsub_groups

unsubscribe() (News::Newsrc) : Chapter 15, Reference: unsubscribe

untie() : Chapter 5, Reference: untie

until modifier : 4.3.1.4. Modifiers

until statement : 4.3.1.1. while loops

update_message() (Mail::Folder) : Chapter 14, Reference: update_message

URI modules : 17.5. The URI Module

URI::Escape : 17.5. The URI Module
URI::Heuristic : 17.5. The URI Module
URI::URL : 17.5.2. URI::URL
URI::URL module : 17.1. LWP Overview

URIs (Universal Resource Identifiers) : 17.1. LWP Overview

url()

CGI.pm module : Chapter 10, Reference: url
HTTP::Daemon module : Chapter 17, Reference: url
HTTP::Request module : Chapter 17, Reference: url

URLs (uniform resource locators)

(see also Win32 modules, Win32::Internet module)

Chapter 19, Reference: CanonicalizeURL

encoding : 9.2. URL Encoding

extra path information : 9.3. Extra Path Information

URI::URL module

17.1. LWP Overview
17.5.2. URI::URL

use directives

7. Packages, Modules, and Objects
7.2. Modules
use English : 4.4. Special Variables
use integer : 4.5.3. Arithmetic Operators
use Socket : 13.1.1. Initializing a Socket

use_alarm() (LWP::UserAgent) : Chapter 17, Reference: use_alarm

use_named_parameters() (CGI.pm) : Chapter 10, Reference: use_named_parameters

Usenet news : 15. Usenet News

Net::News module : 15.2. Net::NNTP
News::Newsrc module : 15.3. The News::Newsrc Module

Usenet newsgroups, Perl-related : 1.4.1. The comp.lang.perl.* Newsgroups

use() : Chapter 5, Reference: use

user()

Mail::Address module

Chapter 14, Reference: user
14.2.6. Parse Email Addresses with Mail::Address

Net::POP3 module

Chapter 14, Reference: user
14.1.3. Retrieving Email with Net::POP3

URI::URL module : Chapter 17, Reference: user

USER command (POP3) : 14.1.3. Retrieving Email with Net::POP3

User::grent module : 8.164. User::grent

User() (Mail::POP3Client) : Chapter 14, Reference: User

User::pwent module : 8.165. User::pwent

user_agent() (CGI.pm) : Chapter 10, Reference: user_agent

user_name() (CGI.pm) : Chapter 10, Reference: user_name

UserAgent object

17.1. LWP Overview
17.2. The LWP Modules
17.2.3. LWP::UserAgent

UserAgent() (Win32::Internet) : Chapter 19, Reference: UserAgent

UserCreate() (Win32::NetAdmin) : Chapter 19, Reference: UserCreate

Username() (Win32::Internet) : Chapter 19, Reference: Username

users, fetching information on : 5.1. Perl Functions by Category

utime() : Chapter 5, Reference: utime

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