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Index: U

-underline option

add method and: 23.8.1. Creating Pages (Mastering Perl/Tk)
Button widgets and: 4.3. Table of Options for Button-Type Widgets (Mastering Perl/Tk)
creating menu items and: 12.2.1. Menubars the Clunky, Casual, Old-Fashioned Way (Mastering Perl/Tk)
font and: 3.2. Dissecting a Font (Mastering Perl/Tk)
keyboard mapping and: 4.14. Adding a Keyboard Mapping (Mastering Perl/Tk)
Label widgets and: 5.1.2. Label Options (Mastering Perl/Tk)
menu item definition and: 12.2.2. Menubars the Slick, Sophisticated, New-Fashioned Way (Mastering Perl/Tk)
Menubutton widgets: 12.4.1. Menubutton Options (Mastering Perl/Tk)
Text widgets and: 8.5.1. Tag Options (Mastering Perl/Tk)

-updatecommand option: 9.5.1. Common Canvas Dash, Stipple, and Tile Options (Mastering Perl/Tk)

-use option: 11.3. Options (Mastering Perl/Tk)

\U (uppercase) characters: 4.6.4. Character Classes (Perl in a Nutshell)

u command (CPAN.pm): 2.4.4. Installing Modules with the CPAN Module (Perl in a Nutshell)

-u (dump core) command-line switch: 19.1.3. Switches (Programming Perl)

\u escape: 5.2.3. The s/// Operator (Substitution) (Programming Perl)

-u file test operator: 4.5.8. File Test Operators (Perl in a Nutshell)

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

-u (setuid) file test: 3.10. Named Unary and File Test Operators (Programming Perl)

\\\\u shortcut: 9.6.5. Case Shifting (Learning Perl)

\U string escape: 1.9.2. Solution (Perl Cookbook)

-U (unsafe) command-line switch: 19.1.3. Switches (Programming Perl)

uc( ): 5. Function Reference (Perl in a Nutshell)

1.9.2. Solution (Perl Cookbook)
29.2.184. uc (Programming Perl)

uc operator: 15.2. Effects of Character Semantics (Programming Perl)

ucfirst( ): 5. Function Reference (Perl in a Nutshell)

1.9.2. Solution (Perl Cookbook)
29.2.185. ucfirst (Programming Perl)

ucfirst operator: 15.2. Effects of Character Semantics (Programming Perl)

UDP: Glossary (Programming Perl)

passing messages with: 16.5.3. Message Passing (Programming Perl)

UDP packets: 16.5. Sockets (Programming Perl)

UDP protocol

writing clients for: 17.4.1. Problem (Perl Cookbook)
writing servers for: 17.5.1. Problem (Perl Cookbook)

udpmsg program (example): 17.5.3. Discussion (Perl Cookbook)

udpqotd program (example): 17.5.3. Discussion (Perl Cookbook)

$uid (see user-ID, numeric)

uid (user-ID): 11.6.1. The stat and lstat Functions (Learning Perl)

$UID ($<) variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

uidl( ) (Net::POP3): 16.1.3. Retrieving Email with Net::POP3 (Perl in a Nutshell)

ul elements: 9.1. Introduction to Trees (Perl & LWP)

umask( ): 5. Function Reference (Perl in a Nutshell)

29.2.186. umask (Programming Perl)
Glossary (Programming Perl)

umask values: 7.1.3. Discussion (Perl Cookbook)

uname( ) (POSIX): 17.8.2. Solution (Perl Cookbook)

unary operators: 4.5.2. Unary Operators (Perl in a Nutshell)

1.5. Operators (Programming Perl)

3. Unary and Binary Operators (Programming Perl)

arithmetic: 1.5.4. Unary Arithmetic Operators (Programming Perl)

Boolean: 1.5.7. Some File Test Operators (Programming Perl)

class handler, invoking: 13.1. The overload Pragma (Programming Perl)

functions, behaving as: 3.1. Terms and List Operators (Leftward) (Programming Perl)

ideographic: 3.5. Ideographic Unary Operators (Programming Perl)

list operators, distinguishing from: 3.10. Named Unary and File Test Operators (Programming Perl)

named: 2.11.3. Filename Globbing Operator (Programming Perl)

3.1. Terms and List Operators (Leftward) (Programming Perl)
3.10. Named Unary and File Test Operators (Programming Perl)
listing of: 3.10. Named Unary and File Test Operators (Programming Perl)

prototyping functions as: 6.4.2. Care with Prototypes (Programming Perl)

unbind method (Net::LDAP): 19.4. Net::LDAP Methods (Perl in a Nutshell)

unbuffered input/output: 7.0.3. I/O Operations (Perl Cookbook)

7.12.3. Discussion (Perl Cookbook)
8.0. Introduction (Perl Cookbook)
15.6.1. Problem (Perl Cookbook)

Unbusy method: 13.18. Marking a Widget Busy and Unbusy (Mastering Perl/Tk)

13.18. Marking a Widget Busy and Unbusy (Mastering Perl/Tk)

uncompress command: 2.3.1. Installing on Unix (Perl in a Nutshell)

uncompressing Perl source code: 2.3.2.2. Standard Perl distribution (Perl in a Nutshell)

uncontrol subroutine: 15.8.3. Description (Perl Cookbook)

undef function: 24.2.1. Time Efficiency (Programming Perl)

29.2.187. undef (Programming Perl)
5. Function Reference (Perl in a Nutshell)
11.0.2. Anonymous Data (Perl Cookbook)
arrays, freeing memory from: 2.8.2. Array Length (Programming Perl)

undef operator: 2.12. The defined Function (Learning Perl)

slices and: 17.6. Slices (Learning Perl)

undef value: 2.11. The undef Value (Learning Perl)

4.2.5. Variables (Perl in a Nutshell)

undefined scalars: 2.6. Scalar Values (Programming Perl)

undefined subroutines, calling with AUTOLOAD: 10.2. Autoloading (Programming Perl)

undefined (undef) value: 1.0. Introduction (Perl Cookbook)

undelete_message( ) (Mail::Folder): 16.2.3. Handle Folders with Mail::Folder (Perl in a Nutshell)

-underline option (widgets): 21.3. Common Widget Configuration Options (Perl in a Nutshell)

_(underscore), global filehandle: 28.2. Special Variables in Alphabetical Order (Programming Perl)

underscore (_)

as private method name: 15.4.2. Tk::ExecuteCommand (Mastering Perl/Tk)
filehandle: 4.4.3. Global Special Filehandles (Perl in a Nutshell)
improving number legibility: 4.2.1. Numbers (Perl in a Nutshell)
in integer literals: 2.2.3. Integer Literals (Learning Perl)
in variable names: 4.10. The use strict Pragma (Learning Perl)
reserving keys with: 14.3.9. Mega-Widget Instance Variables (Mastering Perl/Tk)

underscore filehandle: 11.6.5. Using the Special Underscore Filehandle (Learning Perl)

Underscore module: 14.1.3. Magically Banishing $_ (Programming Perl)

undo method: 8.16.1. Setting and Getting the Gravity (Mastering Perl/Tk)

Undo virtual event: 8.16.1. Setting and Getting the Gravity (Mastering Perl/Tk)

unequal (see equality operators[semi] relational operators)

unescape_from( ) (Mail::Internet): 16.2.5. Mail::Internet Reference (Perl in a Nutshell)

unget_token( ) method: 7.4. Token Sequences (Perl & LWP)

8.5. Narrowing In (Perl & LWP)

Unicoce Transformation Format (see UTF)

Unicode: 1.0. Introduction (Perl Cookbook)

B.30. Locales and Unicode (Learning Perl)

2.1. Atoms (Programming Perl)

15. Unicode (Programming Perl)

case translation tables: 15.2. Effects of Character Semantics (Programming Perl)

converting to characters: 29.2.14. chr (Programming Perl)

editors for: 15.2. Effects of Character Semantics (Programming Perl)

information about: 5.4.3. Unicode Properties (Programming Perl)

line separator character: 2.2. Molecules (Programming Perl)

locales and: 29.2.82. lc (Programming Perl)

paragraph separator character: 2.2. Molecules (Programming Perl)

Perl properties for: 5.4. Character Classes (Programming Perl)

properties: 5.4.3. Unicode Properties (Programming Perl)

bidirectional rendering: 5.4.3.2. Standard Unicode properties (Programming Perl)
block properties: 5.4.3.3. Unicode block properties (Programming Perl)
decomposition of characters: 5.4.3.2. Standard Unicode properties (Programming Perl)
Perl character class shortcuts and: 5.4.2. Classic Perl Character Class Shortcuts (Programming Perl)
Perl composites: 5.4.3.1. Perl's Unicode properties (Programming Perl)
standard: 5.4.3.2. Standard Unicode properties (Programming Perl)
syllabaries, classifying by vowel sounds: 5.4.3.2. Standard Unicode properties (Programming Perl)

properties database: 15.2. Effects of Character Semantics (Programming Perl)

smiley face: 29.2.14. chr (Programming Perl)

summary of, accessing: 15.2. Effects of Character Semantics (Programming Perl)

support for, turning on: 32.1.6. Internationalization and Locale (Programming Perl)

titlecase, converting strings to: 5.2.4. The tr/// Operator (Transliteration) (Programming Perl)

Unicode Standard, Version 3.0: 15.2. Effects of Character Semantics (Programming Perl)

use in Perl, caveats on: 15.3. Caution, [ren2bold] Working (Programming Perl)

wildcard metasymbols, matching with: 5.3.3. Wildcard Metasymbols (Programming Perl)

Unicode character encodings: 1.1. Why Use Perl with XML? (Perl & XML)

2.6. Unicode, Character Sets, and Encodings (Perl & XML)

3.9. Character Sets and Encodings (Perl & XML)

conversion: 3.9.4. Encoding Conversion (Perl & XML)

Perl support for: 3.9.3.1. Core Perl support (Perl & XML)

XML: 3.9.1. Unicode, Perl, and XML (Perl & XML)

vs. ASCII: 1.6. XML Gotchas (Perl & XML)

Unicode characters: 1.7. Regular Expressions (Programming Perl)

in identifiers: 2.5. Names (Programming Perl)
smiley: 2.6.2. String Literals (Programming Perl)

Unicode Consortium: 2.6. Unicode, Character Sets, and Encodings (Perl & XML)

Unicode mailing archive authentication example: 11.4. An HTTP Authentication Example:The Unicode Mailing Archive (Perl & LWP)

Unicode, Perl/Tk and: 1.3.1. Do You Need To Install Anything? (Mastering Perl/Tk)

Unicode::String module: 3.9.4.2. Unicode::String (Perl & XML)

Uniform Resource Identifiers (URIs): 10.1. Perl and XML Namespaces (Perl & XML)

unimport( ): 1.19. Program: psgrep (Perl Cookbook)

13.15.4. Tie Example: Outlaw $_ (Perl Cookbook)

uninitialized, variables: 1.2.1.1. Singularities (Programming Perl)

unions of lists: 4.7.1. Problem (Perl Cookbook)

unique list elements, extracting: 4.6.1. Problem (Perl Cookbook)

unique_name( ) (Net::FTP): 18.2. Net::FTP (Perl in a Nutshell)

UNIVERSAL class: 12.5.3. UNIVERSAL: The Ultimate Ancestor Class (Programming Perl)

methods, adding to: 12.5.3. UNIVERSAL: The Ultimate Ancestor Class (Programming Perl)

UNIVERSAL module: 8.228. UNIVERSAL (Perl in a Nutshell)

32.1.14. Convenient Classes (Programming Perl)

UNIVERSAL package: 13.8.1. Problem (Perl Cookbook)

Universal Time: 11.6.2. The localtime Function (Learning Perl)

Unix: Glossary (Programming Perl)

input/output and: 11.1. What Is a Filehandle? (Learning Perl)

model of files/directories and: 13.3. Links and Files (Learning Perl)

portability and: 1.1.2. Why Are There So Many Footnotes? (Learning Perl)

security bugs: 23.2.1. Unix Kernel Security Bugs (Programming Perl)

truncating kernel interpretation of #! line: 19.1. Command Processing (Programming Perl)

utilities for

diamond operator and: 6.2. Input from the Diamond Operator (Learning Perl)
regular expressions and: 7. Concepts of Regular Expressions (Learning Perl)

Unix domain sockets: 17.0. Introduction (Perl Cookbook)

17.6.1. Problem (Perl Cookbook)

Unix operating system (see C programming also C programming)

(see also C programming)
-exportselection options and: 5.2.6. Text Selection Options (Mastering Perl/Tk)
choosing displays: 16.1.3. Choosing a Display (Mastering Perl/Tk)
clipboard methods: 13.14.1. Clipboard Methods (Mastering Perl/Tk)
color string values: 4.15. Color Options (Mastering Perl/Tk)
command line appearance: 16.1. Using the Command Line (Mastering Perl/Tk)
fileevent method and: 13.21.1. File Events (Mastering Perl/Tk)
font viewers for: 3.1. Experimenting with Fonts (Mastering Perl/Tk)
geometry strings and: 11.3. Options (Mastering Perl/Tk)
Help menubutton: 12.1.5. Menubars (Mastering Perl/Tk)
Icon method and: 11.3. Options (Mastering Perl/Tk)
manager method and: 13.2.5. Widget's Manager (Mastering Perl/Tk)
MouseWheel event: 15.2.5. Binding to a MouseWheel Event (Mastering Perl/Tk)
patch to disable security: 20.1. Security and Inter-Language Considerations (Mastering Perl/Tk)
pathname separators: 16.2. Using the Option Database (Mastering Perl/Tk)
pathname terms: 13.2. Building a Family Tree (Mastering Perl/Tk)
PPM and: 17.1. An Overview of Perl/Tk Image Types (Mastering Perl/Tk)
running Perl/Tk on: 1.3.1. Do You Need To Install Anything? (Mastering Perl/Tk)
select mode differences: 7.3.1. Operating System Differences (Mastering Perl/Tk)
system fonts for: 3.3.1. System Fonts (Mastering Perl/Tk)
test command, test scripts and: 1.3.1. How to Do It (Programming Perl)
WM_TAKE_FOCUS on: 11.3. Options (Mastering Perl/Tk)
X Logical Font Descriptions and: 3.2. Dissecting a Font (Mastering Perl/Tk)
X Window System and: 1.2.1. The X Window System and Xlib (Mastering Perl/Tk)
XBM files and: 17.1. An Overview of Perl/Tk Image Types (Mastering Perl/Tk)

Unix password databases: B.7.1. Direct System Database Access (Learning Perl)

Unix signals, sending/receiving: 14.7. Sending and Receiving Signals (Learning Perl)

Unix system

CPAN modules, installing on: 22.2.1. Decompressing and Unpacking CPAN Modules (Programming Perl)

Unix systems: 1.2.1.1. Singularities (Programming Perl)

#! (shebang) line: 3. The Perl Executable (Perl in a Nutshell)
command processing: 3.1. Command Processing (Perl in a Nutshell)
fileglobbing: 32.1.4. Filenames, Filesystems, and File Locking (Programming Perl)
File::Spec::Unix module: 32.1.4. Filenames, Filesystems, and File Locking (Programming Perl)
installing Perl on: 2.3.1. Installing on Unix (Perl in a Nutshell)
sockets for: 32.1.8. Networking and Interprocess Communication (Programming Perl)

UnixDate( ): 3.7.2. Solution (Perl Cookbook)

unless control structure: 10.1. The unless Control Structure (Learning Perl)

unless modifier: 10.3. Expression Modifiers (Learning Perl)

10.3. Expression Modifiers (Learning Perl)
4.3.1.4. Modifiers (Perl in a Nutshell)
4.1. Simple Statements (Programming Perl)

unless statement: 4.3.1. Conditionals and Loops (Perl in a Nutshell)

1.6.1.1. The if and unless statements (Programming Perl)
if statements, using instead of: 4.3. if and unless Statements (Programming Perl)

unlink( ): 5. Function Reference (Perl in a Nutshell)

9.2.1. Problem (Perl Cookbook)
9.8.3. Discussion (Perl Cookbook)
29.2.188. unlink (Programming Perl)

unlink operator: 13.1. Removing Files (Learning Perl)

2.7.2. Boolean Context (Programming Perl)

unl_subnet_file (IPADM): 19.2. IPADM Design Considerations (Mastering Perl/Tk)

Unmap event: 15.2.1.2. Event descriptor types (Mastering Perl/Tk)

UnmapWindow method: 13.19. Widget Mapping and Layering (Mastering Perl/Tk)

unmark( ) (News::Newsrc): 17.3.1. News::Newsrc Reference (Perl in a Nutshell)

unmarked_articles( ) (News::Newsrc): 17.3.1. News::Newsrc Reference (Perl in a Nutshell)

unmark_list( ) (News::Newsrc): 17.3.1. News::Newsrc Reference (Perl in a Nutshell)

unmark_range( ) (News::Newsrc): 17.3.1. News::Newsrc Reference (Perl in a Nutshell)

unordered lists (see hashes)

unpack: 25.2. Endianness and Number Width (Programming Perl)

1.1.2. Solution (Perl Cookbook)
1.4.3. Discussion (Perl Cookbook)
8.15.1. Problem (Perl Cookbook)
16.2. Manipulating Data with pack and unpack (Learning Perl)
29.2.189. unpack (Programming Perl)
converting binary and decimal numbers: 2.4.3. Discussion (Perl Cookbook)
fixed-width fields, use with: Glossary (Programming Perl)
template characters for: 29.2.108. pack (Programming Perl)

unpacking CPAN modules: 22.2.1. Decompressing and Unpacking CPAN Modules (Programming Perl)

unpacking Perl source code: 2.3.2.2. Standard Perl distribution (Perl in a Nutshell)

unpack_sockaddr_in( ) (Socket): 15.1.4. Socket Module Functions (Perl in a Nutshell)

unpack_sockaddr_un( ) (Socket): 15.1.4. Socket Module Functions (Perl in a Nutshell)

Unparsed handler (Expat): 13.3. Expat Handlers (Perl in a Nutshell)

unparsed_entity_decl method for PerlSAX DTD handlers: 5.2. DTD Handlers (Perl & XML)

unpost( ) (Menu widget): 21.15.2. Menu Methods (Perl in a Nutshell)

unpost method: 12.1.3. Manipulating Menus (Mastering Perl/Tk)

unposting: 12.1.1. Menus and Menu Items (Mastering Perl/Tk)

unqualified, names, searching for: 2.5.1. Name Lookups (Programming Perl)

unquoted hash keys: 17.4. Unquoted Hash Keys (Learning Perl)

unsafe operations: 19.1.3. Switches (Programming Perl)

unselectAll method: 8.16.1. Setting and Getting the Gravity (Mastering Perl/Tk)

unshift( ): 5. Function Reference (Perl in a Nutshell)

9. Data Structures (Programming Perl)
29.2.190. unshift (Programming Perl)
circular lists: 4.16.2. Solution (Perl Cookbook)
Tie::IxHash module and: 5.6.3. Discussion (Perl Cookbook)

unshift operator: 3.4.2. The shift and unshift Operators (Learning Perl)

unsigned integers, lists of, storing: 29.2.195. vec (Programming Perl)

unsigned shorts: 29.2.162. sprintf (Programming Perl)

unsub_groups( ) (News::Newsrc): 17.3.1. News::Newsrc Reference (Perl in a Nutshell)

unsubscribe( ) (News::Newsrc): 17.3.1. News::Newsrc Reference (Perl in a Nutshell)

untie( ): 5. Function Reference (Perl in a Nutshell)

14.1.2. Solution (Perl Cookbook)
14. Tied Variables (Programming Perl)
14.5. A Subtle Untying Trap (Programming Perl)
29.2.21. dbmclose (Programming Perl)
29.2.191. untie (Programming Perl)
outstanding references, not eliminating: 14.1. Tying Scalars (Programming Perl)

until control structure: 10.2. The until Control Structure (Learning Perl)

until loops: 4.4.1. while and until Statements (Programming Perl)

until modifier: 10.3. Expression Modifiers (Learning Perl)

10.3. Expression Modifiers (Learning Perl)
4.3.1.4. Modifiers (Perl in a Nutshell)
4.1. Simple Statements (Programming Perl)

until statement: 4.3.1.1. while loops (Perl in a Nutshell)

untying trap: 14.5. A Subtle Untying Trap (Programming Perl)

unwinding hashes: 5.2.1. The Hash as a Whole (Learning Perl)

up method: 17.2.3.2. Semaphores (Programming Perl)

upcase function: 6.2.1. Tricks with Parameter Lists (Programming Perl)

update command: 15.8. Synthesizing Virtual Events (Mastering Perl/Tk)

update method: 17.7.3. Capturing a Window with Tk::WinPhoto (Mastering Perl/Tk)

22.1.4. The Recipe for Displaying Web Images (Mastering Perl/Tk)

update_message( ) (Mail::Folder): 16.2.3. Handle Folders with Mail::Folder (Perl in a Nutshell)

uploading files: 5.7. File Uploads (Perl & LWP)

uppercase

case shifting and: 9.6.5. Case Shifting (Learning Perl)

converting to: 2.6.2. String Literals (Programming Perl)

5.2.3. The s/// Operator (Substitution) (Programming Perl)

converting to lowercase: 1.9.1. Problem (Perl Cookbook)

vs. lowercase in variable names: 2.5.1. Choosing Good Variable Names (Learning Perl)

URI class

characters, URL standard: 4.1.1. Constructors (Perl & LWP)
component access, URLs: 4.1.4. Components of a URL (Perl & LWP)
objects: 4.1.1. Constructors (Perl & LWP)
queries: 4.1.5. Queries (Perl & LWP)

URI->new_abs method: 4.1.1. Constructors (Perl & LWP)

URI modules: 20.5. The URI Module (Perl in a Nutshell)

URI::Escape: 20.5. The URI Module (Perl in a Nutshell)
URI::Heuristic: 20.5. The URI Module (Perl in a Nutshell)
URI::URL: 20.5.3. URI::URL (Perl in a Nutshell)
URI::URL module: 20.1. LWP Overview (Perl in a Nutshell)
URL brackets: 4.1.1. Constructors (Perl & LWP)
URL quotes: 4.1.1. Constructors (Perl & LWP)
URL whitespace: 4.1.1. Constructors (Perl & LWP)

URI objects: 4.1. Parsing URLs (Perl & LWP)

cloning: 4.1.1. Constructors (Perl & LWP)
as strings: 4.1.2. Output (Perl & LWP)

uri( ) (SOAP::Lite): 14.2. SOAP::Lite (Perl in a Nutshell)

uri_escape( ) function: 2.1. URLs (Perl & LWP)

5.2.1. GETting Fixed URLs (Perl & LWP)

URI::Escape module: 2.1. URLs (Perl & LWP)

URI::Heuristic: 20.7.3. Discussion (Perl Cookbook)

URIs (Uniform Resorce Identifiers): 10.1. Perl and XML Namespaces (Perl & XML)

URIs (Universal Resource Identifiers): 20.1. LWP Overview (Perl in a Nutshell)

url( )

CGI.pm module: 10.7. CGI.pm Reference (Perl in a Nutshell)
HTTP::Daemon module: 20.3.7. HTTP::Daemon (Perl in a Nutshell)
HTTP::Request module: 20.3.1. HTTP::Request (Perl in a Nutshell)

URL encoded characters: 2.1. URLs (Perl & LWP)

urlify program: 6.21. Program: urlify (Perl Cookbook)

urllist parameter, CPAN configuration table: 8.46.4. CD-ROM Support (Perl in a Nutshell)

URLs

code in this book: 0.3. Code Examples (Learning Perl)

CPAN: 1.3.1. What Is CPAN? (Learning Perl)

B.4.3. Finding and Installing Modules (Learning Perl)

Perl Monastery: 1.3.3. Are There Any Other Kinds of Support? (Learning Perl)

search interfaces for Perl: 1.3.1. What Is CPAN? (Learning Perl)

URLs, LWP and: 22.1. Library for WWW Access in Perl (Mastering Perl/Tk)

URLs (uniform resource locators): 22.7.1. General Internet Methods (Perl in a Nutshell)

encoding: 9.2. URL Encoding (Perl in a Nutshell)

extra path information: 9.3. Extra Path Information (Perl in a Nutshell)

URI::URL module: 20.1. LWP Overview (Perl in a Nutshell)

20.5.3. URI::URL (Perl in a Nutshell)

url_scan( ) function: 7.4.3. Bundling into a Program (Perl & LWP)

use: 4.7. Global Declarations (Programming Perl)

global and lexical scoping of: 4.8. Scoped Declarations (Programming Perl)

use attributes pragma: 6.5. Subroutine Attributes (Programming Perl)

use base declarations: 12.5.1. Inheritance Through @ISA (Programming Perl)

pseudohash implementations, requirement with: 12.7.1. Field Declarations with use fields (Programming Perl)

use base pragma: 31.3. use base (Programming Perl)

use blib pragma: 31.4. use blib (Programming Perl)

use bytes pragma: 15.2. Effects of Character Semantics (Programming Perl)

use charnames pragma: 15.2. Effects of Character Semantics (Programming Perl)

use command: 10. Packages (Programming Perl)

use declarations: 1.2.1.4. Simplicities (Programming Perl)

4.7. Global Declarations (Programming Perl)
4.9. Pragmas (Programming Perl)
(see also pragmas)
modules: 11.1. Using Modules (Programming Perl)
tie function and: 14. Tied Variables (Programming Perl)
use strict: 24.1.2. Frequently Ignored Advice (Programming Perl)

use directives: B.4.3. Finding and Installing Modules (Learning Perl)

7. Packages,Modules, and Objects (Perl in a Nutshell)
7.2. Modules (Perl in a Nutshell)
pragmas and: B.6. Pragmas (Learning Perl)

use fields declarations: 12.5.1. Inheritance Through @ISA (Programming Perl)

use fields pragma

field declarations with: 12.7.1. Field Declarations with use fields (Programming Perl)

use filetest pragma: 3.10. Named Unary and File Test Operators (Programming Perl)

use overload pragma: 13.1. The overload Pragma (Programming Perl)

use pragmas: 12.0.1. Modules (Perl Cookbook)

trapping errors in: 12.2.1. Problem (Perl Cookbook)

use autouse pragma: 12.3.1. Problem (Perl Cookbook)

use lib pragma: 12.7.3. Discussion (Perl Cookbook)

use locale pragma: 1.9.3. Discussion (Perl Cookbook)

6.0.2. Pattern-Matching Modifiers (Perl Cookbook)
6.12.2. Solution (Perl Cookbook)

use overload pragma: 13.14.1. Problem (Perl Cookbook)

use statement: 21.1. How Perl Works (Programming Perl)

use strict pragma: 4.10. The use strict Pragma (Learning Perl)

B.6.4. The strict Pragma (Learning Perl)

use subs declarations: 12.5.4. Method Autoloading (Programming Perl)

use utf8 pragma: 5.3.3. Wildcard Metasymbols (Programming Perl)

use warnings pragma: 20. The Perl Debugger (Programming Perl)

use_alarm( ) (LWP::UserAgent): 20.2.3. LWP::UserAgent (Perl in a Nutshell)

use_named_parameters( ) (CGI.pm): 10.7. CGI.pm Reference (Perl in a Nutshell)

Usenet

Perl modules for: 22.1. The CPAN modules Directory (Programming Perl)

Usenet news: 18.4.1. Problem (Perl Cookbook)

17. Usenet News (Perl in a Nutshell)
Net::News module: 17.2. Net::NNTP (Perl in a Nutshell)
News::Newsrc module: 17.3. The News::Newsrc Module (Perl in a Nutshell)

Usenet newsgroups, Perl-related: 1.4.1. The comp.lang.perl.* Newsgroups (Perl in a Nutshell)

use( ): 5. Function Reference (Perl in a Nutshell)

User-Agent header: 3.4.2. Request Parameters (Perl & LWP)

user agents: 3.4. User Agents (Perl & LWP)

22.1. Library for WWW Access in Perl (Mastering Perl/Tk)
authentication: 3.4.5. Authentication (Perl & LWP)
imitating others: 11.2.1. Pretending to Be Netscape (Perl & LWP)
LWP::RobotUA: 12.2. A User Agent for Robots (Perl & LWP)
protocols: 3.4.3. Protocols (Perl & LWP)
proxies: 3.4.6. Proxies (Perl & LWP)
redirection: 3.4.4. Redirection (Perl & LWP)
request methods: 3.4.7. Request Methods (Perl & LWP)

USER command (POP3): 16.1.3. Retrieving Email with Net::POP3 (Perl in a Nutshell)

user-defined functions (see subroutines)

user-defined subroutines: 1.2.2. Verbs (Programming Perl)

1.2.2. Verbs (Programming Perl)
(see also subroutines)

user efficiency, Perl programming: 24.2.6. User Efficiency (Programming Perl)

user functions (see subroutines)

User::grent module: 8.229. User::grent (Perl in a Nutshell)

user ID (see UID)

user-ID, numeric ($uid): 11.6.1. The stat and lstat Functions (Learning Perl)

changing file ownership and: 13.6. Changing Ownership (Learning Perl)

user-ID (uid): 11.6.1. The stat and lstat Functions (Learning Perl)

user interfaces: 15.0. Introduction (Perl Cookbook)

checking for waiting input: 15.9.1. Problem (Perl Cookbook)
clearing the screen: 15.3.1. Problem (Perl Cookbook)
controlling programs with Expect: 15.13.1. Problem (Perl Cookbook)
determining window size: 15.4.1. Problem (Perl Cookbook)
dialog boxes with Tk: 15.15.1. Problem (Perl Cookbook)
editing input: 15.11.1. Problem (Perl Cookbook)
full-screen mode: 15.0. Introduction (Perl Cookbook)
managing screen: 15.12.1. Problem (Perl Cookbook)
manipulating terminal directly: 15.8.1. Problem (Perl Cookbook)
menus with Tk: 15.14.1. Problem (Perl Cookbook)
multiscreen CGI scripts: 19.12.1. Problem (Perl Cookbook)
parsing command-line options: 15.1.1. Problem (Perl Cookbook)
reading from keyboard: 15.6.1. Problem (Perl Cookbook)
reading passwords without echo: 15.10.1. Problem (Perl Cookbook)
removing DOS shell window: 15.17.1. Problem (Perl Cookbook)
ringing terminal bell: 15.7.1. Problem (Perl Cookbook)
tcapdemo program: 15.18.1. Description (Perl Cookbook)
testing programs if running interactively: 15.2.1. Problem (Perl Cookbook)
text color: 15.5.1. Problem (Perl Cookbook)
Tk resize events: 15.16.1. Problem (Perl Cookbook)

user interfaces, modules providing: 32.1.11. User Interfaces (Programming Perl)

User::pwent module: 8.230. User::pwent (Perl in a Nutshell)

user_agent( ) (CGI.pm): 10.7. CGI.pm Reference (Perl in a Nutshell)

UserAgent object: 20.1. LWP Overview (Perl in a Nutshell)

20.2. The LWP Modules (Perl in a Nutshell)
20.2.3. LWP::UserAgent (Perl in a Nutshell)

UserAgent( ) (Win32::Internet): 22.7.1. General Internet Methods (Perl in a Nutshell)

UserCreate( ) (Win32::NetAdmin): 22.10. Win32::NetAdmin (Perl in a Nutshell)

User::grent module: 29.2.44. getgrent (Programming Perl)

32.1.7. Operating System Interfaces (Programming Perl)

userinfo( ) method: 4.1.4. Components of a URL (Perl & LWP)

user_name( ) (CGI.pm): 10.7. CGI.pm Reference (Perl in a Nutshell)

username, passwd file entry from: 29.2.62. getpwnam (Programming Perl)

Username( ) (Win32::Internet): 22.7.1. General Internet Methods (Perl in a Nutshell)

User::pwent module: 29.2.63. getpwuid (Programming Perl)

32.1.7. Operating System Interfaces (Programming Perl)
Class::Struct, using to create objects and accessors: 32.6. Class::Struct (Programming Perl)

users

authenticating, Perl modules for: 22.1. The CPAN modules Directory (Programming Perl)

CPU times: 29.2.181. times (Programming Perl)

granting limited privileges to: 23.1. Handling Insecure Data (Programming Perl)

groups of: Glossary (Programming Perl)

Glossary (Programming Perl)
(see also GID)

users, fetching information on: 5.1. Perl Functions by Category (Perl in a Nutshell)

users, information about, functions for getting: 29.1. Perl Functions by Category (Programming Perl)

userstats program (example): 14.1.3. Discussion (Perl Cookbook)

use_sleep( ) (LWP::RobotUA): 20.2.1. LWP::RobotUA Sections (Perl in a Nutshell)

/usr/bin/perl: 1.4.2. What's Inside That Program? (Learning Perl)

/usr/local/bin/perl: 1.4.2. What's Inside That Program? (Learning Perl)

utf8

globally switching interfaces to: 28.2. Special Variables in Alphabetical Order (Programming Perl)

UTF-8: 2.1. Atoms (Programming Perl)

variable-length character encoding: 15.1. Building Character (Programming Perl)

UTF-8 character encodings: 1.1. Why Use Perl with XML? (Perl & XML)

2.6. Unicode, Character Sets, and Encodings (Perl & XML)
3.9. Character Sets and Encodings (Perl & XML)
3.9.2.1. UTF-8 (Perl & XML)

UTF-8 characters

converting to integers: 15.2. Effects of Character Semantics (Programming Perl)

UTF-8, Perl/Tk and: 1.3.1. Do You Need To Install Anything? (Mastering Perl/Tk)

UTF-32 character encodings: 3.9.2.3. UTF-32 (Perl & XML)

utf8 module: 8.231. utf8 (Perl in a Nutshell)

32.1.6. Internationalization and Locale (Programming Perl)

utf8 (Perl version): 15.1. Building Character (Programming Perl)

utf8 pragma: 15.2. Effects of Character Semantics (Programming Perl)

utf8 strings, converting to/from byte strings: 15.1. Building Character (Programming Perl)

UTF (Unicode Transformation Format): 3.9.2. Unicode Encodings (Perl & XML)

utilities

inside: B.4.3. Finding and Installing Modules (Learning Perl)
perlbug: 1.3.4. What If I Find a Bug in Perl? (Learning Perl)
Unix (see Unix, utilities for)
which_dbm: 16.1. DBM Files and DBM Hashes (Learning Perl)

utime( ): 5. Function Reference (Perl in a Nutshell)

9.1.2. Solution (Perl Cookbook)
13.7. Changing Timestamps (Learning Perl)
29.2.193. utime (Programming Perl)

utmp file (see /etc/utmp file)

UV (internal unsigned integer value): 21.2. Internal Data Types (Programming Perl)

uvi program (example): 9.1.3. Discussion (Perl Cookbook)

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