U

-u file test operator : Named Unary and File Test Operators
-U switch, perl : Switches
-u switch, perl : Switches
uc function : uc
ucfirst function : ucfirst
UDP communications : UDP: message passing
$UID : vars--Predeclare Global Variable Names
uid (user ID) Global Special Variables chown assumed : Talking to yourself passwd file entry from : getpwuid
$uid file statistic : stat
umask function : umask
unary operators Calling conventions for unary operations Overloadable operations arithmetic : Autoincrement and Autodecrement Operators glob operator as : Filename globbing operator ideographic : Ideographic Unary Operators named Filename globbing operator Named Unary and File Test Operators
unbuffered input : getc
undef (value) : defined
undef function undef Time Efficiency
undefined scalars : Scalar Values Boolean context and : Boolean context
underscore : What You Don't Know Won't Hurt You (Much)
unequal : Equality Operators
uninitialized variables : Singularities
uninstall( ) : ExtUtils::Install--Install Files from Here to There
UNIVERSAL class : A Class Is Simply a Package
UNIX clients/servers : UNIX-domain clients and servers security bugs : Security bugs
unless statement : The if and unless statements
unlink function : unlink
unlinking : Generation of a hash of complex records
unordered lists : Hashes.
unpack function : unpack
unsafe operations : Switches
unshift function : unshift
untie function dbmclose untie Using Tied Variables
until statement : The while and until statements
use declarations : Pragmas use strict : Frequently Ignored Advice use vars pragma : AutoLoader--Load Functions Only on Demand
user CPU times : times
user CPU time : Notes
user efficiency : User Efficiency
user ID : chown
user-defined functions : Subroutines
username passwd file entry from : getpwnam
utime function : utime
utmp file : getnetent 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 © 1996 O'Reilly & Associates, Inc. All Rights Reserved.