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| Explanatory note
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 (see $< variable)
- uid (user ID) (see also $< variable; $> variable)
-
- 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 (see _)
- unequal (see equality operators; relational 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 (see if statement)
- unlink function
: unlink
- unlinking (see deleting)
- unordered lists (see hashes)
- unpack function
: unpack
- unsafe operations
: Switches
- unshift function
: unshift
- untie function
- dbmclose
- untie
- Using Tied Variables
- until statement (see while loop)
- use declarations (see 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 (see uid)
- user-defined functions (see subroutines)
- username
- passwd file entry from
: getpwnam
- "uses" relationship
: Implementation (the "Uses" Relationship)
- 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
Explanatory note
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