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Index: U

\U string escape: 1.13.2. Solution
ualarm( ): 3.9.3. Discussion
uc( ): 1.13.2. Solution
ucfirst( ): 1.13.2. Solution
UDP (User Datagram Protocol)
writing clients for: 17.4.1. Problem
writing servers for: 17.5.1. Problem
umask values: 7.1.3. Discussion
uname( ): 17.8.2. Solution
unbuffered input/output: 7.. I/O Operations
7.19.3. Discussion
8.. Advanced Operations
15.6.1. Problem
undef( ), compared to delete( ): 5.4.3. Discussion
undefined values: 1.. Introduction
underscore (_), file stat cache: 9.. Introduction
Unicode: 1.. Unicode Support in Perl
character database: 1.5.3. Discussion
combined characters, canonicalizing strings with: 1.9.1. Problem
converting Microsoft files to: 8.21.1. Problem
encodings, XML and: 22.. XML Declaration
named characters, using: 1.5.1. Problem
reading and writing from filehandles: 8.20.1. Problem
strings
treating as octets: 1.10.1. Problem
treating as single characters: 1.8.1. Problem
Uniform Resource Locators (see URLs)
unimport( ): 13.15.4. Tie Example: Outlaw $_
unions of lists: 4.8.1. Problem
computing: 4.9.1. Problem
unique list elements, extracting: 4.7.1. Problem
universal character code: 1.. The Universal Character Code
UNIVERSAL module: 13.8.3. Discussion
Unix
domain sockets: 17.. Introduction
17.6.1. Problem
I/O layers: 7.19.3. Discussion
unix layer: 7.. I/O Operations
7.19.3. Discussion
UnixDate( ): 3.7.3. Discussion
unlink( ), removing directories and contents: 9.8.3. Discussion
unpack( ): 1.1.2. Solution
1.4.3. Discussion
fixed-length records: 8.15.2. Solution
unread bytes, determining number: 7.21.1. Problem
unshift( ), circular lists: 4.17.2. Solution
updating random-access files: 8.13.1. Problem
uppercase, converting to lowercase: 1.13.1. Problem
uri_escape( ): 20.2.3. Discussion
URI::Escape module: 20.2.3. Discussion
URI::Heuristic module: 20.1.3. Discussion
20.7.3. Discussion
urlify program: 6.21. Program: urlify
URLs (Uniform Resource Locators): 19.. Architecture
expanding tildes in filenames: 7.3.3. Discussion
external redirection: 21.4.3. Discussion
extracting from HTML: 20.3.1. Problem
fetching from Perl scripts: 20.1.1. Problem
putting HTML links around: 6.21. Program: urlify
transparently storing information in: 21.10.1. Problem
use autouse pragma: 12.3.1. Problem
use bytes pragma: 1.10.2. Solution
use charnames pragma: 1.5.3. Discussion
use constant pragma: 1.21.2. Solution
use lib pragma: 12.8.3. Discussion
use locale pragma: 6.12.2. Solution
use operator: 10.. Introduction
use overload pragma: 13.14.1. Problem
use pragmas: 6.12.2. Solution
12.. Modules
trapping errors in: 12.2.1. Problem
Usenet news messages: 18.4.1. Problem
User Datagram Protocol (see UDP)
user interfaces: 15.. Introduction
adding text to images: 15.20.1. Problem
checking for waiting input: 15.9.1. Problem
clearing the screen: 15.3.1. Problem
controlling programs with Expect: 15.13.1. Problem
determining window size: 15.4.1. Problem
dialog boxes, creating with Tk: 15.15.1. Problem
DOS shell window, removing: 15.17.1. Problem
editing input: 15.11.1. Problem
full-screen mode: 15.. Introduction
graphing data: 15.18.1. Problem
15.23. Program: graphbox
managing screen: 15.12.1. Problem
manipulating terminal directly: 15.8.1. Problem
menus, creating with Tk: 15.14.1. Problem
multiscreen CGI scripts: 19.11.1. Problem
reading from keyboard: 15.6.1. Problem
reading passwords without echo: 15.10.1. Problem
ringing terminal bell: 15.7.1. Problem
tcapdemo program: 15.21.1. Description
testing programs if running interactively: 15.2.1. Problem
text color: 15.5.1. Problem
thumbnailing images: 15.19.1. Problem
Tk resize events: 15.16.1. Problem
User::pwent module: 4.16.3. Discussion
userstats program: 14.1.3. Discussion
usleep( ): 3.9.3. Discussion
UTF-8: 1.. Unicode Support in Perl
8.20.3. Discussion
utf8 I/O layer: 8.. I/O Layers
utime( ), timestamps: 9.1.2. Solution


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