Symbols & Numbers | 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

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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