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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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