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Index: U

\U string escape : 1.9. Controlling Case
\u string escape : 1.9. Controlling Case
uc( ) : 1.9. Controlling Case
ucfirst( ) : 1.9. Controlling Case
UDP protocol
writing clients : 17.4. Setting Up a UDP Client
writing servers : 17.5. Setting Up a UDP Server
udpmsg program (example) : 17.5. Setting Up a UDP Server
udpqotd program (example) : 17.5. Setting Up a UDP Server
umask values : 7.1. Opening a File
uname( ) (POSIX) : 17.8. Finding Your Own Name and Address
unbuffered input/output
7.0. Introduction
7.12. Flushing Output
8.0. Introduction
15.6. Reading from the Keyboard
uncontrol subroutine : 15.8. Using POSIX termios
undef( ) : 11.0. Introduction
undefined (undef) value : 1.0. Introduction
Unicode : 1.0. Introduction
unimport( )
1.18. Program: psgrep
13.15. Creating Magic Variables with tie
unions of lists : 4.7. Finding Elements in One Array but Not Another
unique list elements, extracting : 4.6. Extracting Unique Elements from a List
UNIVERSAL package : 13.8. Determining Subclass Membership
Unix domain sockets
17.0. Introduction
17.6. Using UNIX Domain Sockets
UnixDate( ) : 3.7. Parsing Dates and Times from Strings
unlink( )
9.2. Deleting a File
9.8. Removing a Directory and Its Contents
unpack( )
1.1. Accessing Substrings
1.4. Converting Between ASCII Characters and Values
8.15. Reading Fixed-Length Records
converting binary and decimal numbers : 2.4. Converting Between Binary and Decimal
unshift( )
circular lists : 4.16. Implementing a Circular List
Tie::IxHash module and : 5.6. Retrieving from a Hash in Insertion Order
untie( ) : 14.1. Making and Using a DBM File
uppercase, converting to lowercase : 1.9. Controlling Case
URI::Heuristic : 20.7. Finding Stale Links
urlify program : 6.21. Program: urlify
URLs (Uniform Resource Locators) : 19.0. Introduction
extracting from HTML : 20.3. Extracting URLs
fetching from Perl scripts : 20.1. Fetching a URL from a Perl Script
putting HTML links around : 6.21. Program: urlify
redirecting CGI requests : 19.8. Redirecting to a Different Location
use pragmas : 12.0. Introduction
trapping errors in : 12.2. Trapping Errors in require or use
use autouse pragma : 12.3. Delaying use Until Run Time
use lib pragma : 12.7. Keeping Your Own Module Directory
use locale pragma
1.9. Controlling Case
6.0. Introduction
6.12. Honoring Locale Settings in Regular Expressions
use overload pragma : 13.14. Overloading Operators
Usenet news : 18.4. Reading and Posting Usenet News Messages
user input : (see input)
user interfaces : 15.0. Introduction
checking for waiting input : 15.9. Checking for Waiting Input
clearing the screen : 15.3. Clearing the Screen
controlling programs with Expect : 15.13. Controlling Another Program with Expect
determining window size : 15.4. Determining Terminal or Window Size
dialog boxes with Tk : 15.15. Creating Dialog Boxes with Tk
editing input : 15.11. Editing Input
full-screen mode : 15.0. Introduction
managing screen : 15.12. Managing the Screen
manipulating terminal directly : 15.8. Using POSIX termios
menus with Tk : 15.14. Creating Menus with Tk
multiscreen CGI scripts : 19.12. Writing a Multiscreen CGI Script
parsing command-line options : 15.1. Parsing Program Arguments
reading from keyboard : 15.6. Reading from the Keyboard
reading passwords without echo : 15.10. Reading Passwords
removing DOS shell window : 15.17. Removing the DOS Shell Window with Windows Perl/Tk
ringing terminal bell : 15.7. Ringing the Terminal Bell
tcapdemo program : 15.18. Program: Small termcap program
testing programs if running interactively : 15.2. Testing Whether a Program Is Running Interactively
text color : 15.5. Changing Text Color
Tk resize events : 15.16. Responding to Tk Resize Events
userstats program (example) : 14.1. Making and Using a DBM File
utime( ) : 9.1. Getting and Setting Timestamps
uvi program (example) : 9.1. Getting and Setting Timestamps


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