Perl in a Nutshell, 2nd Edition

U

\\\\U (uppercase) characters, Character Classes

u command (CPAN.pm), u

-u file test operator, File Test Operators

-U option (dprofpp), The Perl Profiler

-u option (dprofpp), The Perl Profiler

uc(), uc

ucfirst(), ucfirst

$UID ($<) variable, Global Special Variables

uidl() (Net\:\:POP3), uidl

umask(), umask

unary operators, Unary Operators

unbind method (Net\:\:LDAP), Net::LDAP Methods

uncompress command, Installing on Unix

uncompressing Perl source code, Standard Perl distribution

undef value, Variables

undef(), undef

undelete_message() (Mail\:\:Folder), undelete_message

-underline option (widgets), Common Widget Configuration Options

underscore (_), Numbers, Global Special Filehandles

filehandle, Global Special Filehandles

improving number legibility, Numbers

unescape_from() (Mail\:\:Internet), unescape_from

unicode, Unicode

unique_name() (Net\:\:FTP), unique_name

UNIVERSAL module, UNIVERSAL

Unix-domain sockets, Sockets

Unix systems, Installing on Unix, The Perl Executable, Command Processing

#! (shebang) line, The Perl Executable

command processing, Command Processing

installing Perl on, Installing on Unix

unless modifier, Modifiers

unless statement, Conditionals and Loops

unlink(), unlink

unmark() (News\:\:Newsrc), unmark

unmarked_articles() (News\:\:Newsrc), unmarked_articles

unmark_list() (News\:\:Newsrc), unmark_list

unmark_range() (News\:\:Newsrc), unmark_range

unpack(), unpack

unpacking Perl source code, Standard Perl distribution

unpack_sockaddr_in() (Socket), unpack_sockaddr_in

unpack_sockaddr_un() (Socket), ...