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U

-u file test operator : Named Unary and File Test Operators
-U switch, perl : Switches
-u switch, perl : Switches
<u> tags : The <u> Tag
uc function : uc
ucfirst function : ucfirst
UDP communications : UDP: message passing
$UID (see $< variable)
uid (user ID) (see also $<) chown assumed : Talking to yourself passwd file entry from : getpwuid
UID (user identification) File Permission Problems Set UID/GID Wrapper
$uid file statistic : stat
<ul> tag : <ul>
<ul> tags Unordered, Ordered, and Definition Lists The <ul> Tag The style and class attributes
umask function : umask
unary operators Calling conventions for unary operations Overloadable operations Number of Operands arithmetic : Autoincrement and Autodecrement Ope... glob operator as : Filename globbing operator ideographic : Ideographic Unary Operators named Filename globbing operator Named Unary and File Test Operators new Data Type Wrapper Objects Object Creation Operator (new) Creating New Objects with Constructors Creating Arrays typeof Undefined The typeof Operator typeof operator : Conversions to Objects typeof operators : Core Language Changes void The void Operator JavaScript in URLs - (negation) : Unary Negation (-)
"Unauthorized" status code Status Codes Checking Hypertext (HTTP) Links
unbuffered input : getc
uncgi library C Shell (UNIX Only) C/C++ C/C++ decoding using uncgi
undef (value) : defined
undef function undef Time Efficiency
undefined scalars : Scalar Values Boolean context and : Boolean context
undefined (value) Undefined Undefined Object Properties converting Conversions to Strings Conversions to Numbers Conversions to booleans Conversions to Objects
underlining (nroff) : UNIX Manual Page Gateway
underscore (see _)
underscoring : The <u> Tag
unequal (see equality operators; relational operators)
unescape( ) : unescape( ) Function
unescape() Reading Cookies unescape()
uniform resource locators (see URLs)
uninitialized variables : Singularities
uninstall( ) : ExtUtils::Install--Install Files fr...
units attribute (<embed>) : The units attribute
UNIVERSAL class : A Class Is Simply a Package
Universal Coordinated Time (UTC) : Date.UTC( ) Method
universal resource identifiers (see URIs)
UNIX (see environment variables) clients/servers : UNIX-domain clients and servers manual pages UNIX Manual Page Gateway security bugs : Security bugs sockets in : Overview variables (see environment variables)
Unix platforms : Window.open() method browser background color : Document Properties data tainting on : Enabling Data Tainting in Navigator 3.0 window size and : Window Size on Unix Platforms
unless statement (see if statement)
unlink command : CGI Side Includes
unlink function : unlink
UNLINK method : Other methods
unlinking (see deleting)
unnamed functions : The Function() Constructor
unordered lists Unordered, Ordered, and Definition Lists Unordered Lists The style and class attributes <ul> custom bullets : Custom Bullets nesting : Nested Unordered Lists
unpack function : unpack
unsafe characters in URLs : Handling reserved and unsafe characters
unsafe operations : Switches
unshift function : unshift
untaint( ) : untaint( ) Function
untaint() JavaScript Security The taint() and untaint() Functions untaint()
untie function dbmclose untie Using Tied Variables
until statement (see while loop)
untyped variables : Untyped Variables
updating databases : Updating a database
Upgrade header : Upgrade
uploading files BasePlus.pm
uptime command : Server Redirection
URI header Results Processing URI
URIs (uniform resource identifiers) : Uniform Resource Locators (URLs)
URL object URL URL.hash URL.host URL.hostname URL.href URL.pathname URL.port URL.protocol URL.search
URL property Miscellaneous Changes Document Properties Document.URL Properties
URL protocol specifiers javascript: Exploring JavaScript JavaScript URL Execution mailto: Security Holes and Security Hobbles Security Hobbles in Navigator 3.0
URLs Document.URL about:cache : Security Holes and Security Hobbles extracting information from : The Location Object javascript: protocol specifier : JavaScript in URLs referral : Document Properties
URLs (uniform resource locators) URLs Referencing Documents: The URL Using relative URLs Uniform Resource Locators (URLs) <base> tag for The <base> Header Element Using <base> checking with socket library : Checking Hypertext (HTTP) Links cookies for : Cookies encoding for forms URL Encoding The <form> Tag extra path information : Extra Path Information generating randomly : A random URL generator http The http URL Sample http URLs imagemaps of : Introduction to Imagemaps JavaScript : JavaScript URLs Location object : Location Object query : The query URL randomly following : Random Links returning by redirection : Server Redirection as style property values : URL property values
urn attribute <link> tag : Attributes <a> tag : Attributes
urn attribute (<a>) : The urn attribute
URNs (universal resource names) : The urn attribute
use command : Employee database
use declarations (see pragmas) use strict : Frequently Ignored Advice use vars pragma : AutoLoader--Load Functions Only on ...
usemap attribute <img> tag : Attributes <img> Image Maps The ismap and usemap attributes <object> : The shapes and usemap attributes <object> tag : Attributes
Usenet, JavaScript newsgroups : Discussion of JavaScript
user CPU times : times
user CPU time : Notes
user efficiency : User Efficiency
user ID (see uid)
user identification (UID) File Permission Problems Set UID/GID Wrapper
user interface design : User Interface Considerations
User-Agent header Compatibility Through CGI Scripts User-Agent
user-defined functions (see subroutines)
userAgent property The Navigator, MimeType, and Plugin... Compatibility Through CGI Scripts Navigator.userAgent Properties
username passwd file entry from : getpwnam
users (see forms) addresses of (see REMOTE_ADDR) authenticating : User Authentication and Identification counting (see access counters) information from (see forms) input from (see input) interacting with Interact with the User Using the Java System Classes names of (see REMOTE_HOST) notifying of browser incompatibility : Notifying Users of Old Browsers
"uses" relationship : Implementation (the "Uses" Relationship)
UTC( ) Methods Date.UTC( ) Method
UTC() : Date.UTC()
utime function : utime
utmp file (see /etc/utmp file) 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 Copyright © 1997 O'Reilly & Associates, Inc. All Rights Reserved.