[SYMBOL]
[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]
\U string escape
\u string escape
ualarm( )
uc( )
ucfirst( )
UDP (User Datagram Protocol) writing clients for
writing servers for
umask values
uname( )
unbuffered input/output
2nd
3rd
4th
undef( ), compared to delete( )
undefined values
underscore (_), file stat cache
Unicode
character database
combined characters, canonicalizing strings with
converting Microsoft files to
encodings, XML and
named characters, using
reading and writing from filehandles
strings treating as octets
treating as single characters
Uniform Resource Locators
[See URLs] unimport( )
unions of lists
computing
unique list elements, extracting
universal character code
UNIVERSAL module
Unix domain sockets
2nd
I/O layers
unix layer
2nd
UnixDate( )
unlink( ), removing directories and contents
unpack( )
2nd
fixed-length records
unread bytes, determining number
unshift( ), circular lists
updating random-access files
uppercase, converting to lowercase
URI::Escape module
URI::Heuristic module
2nd
uri_escape( )
urlify program
URLs (Uniform Resource Locators)
expanding tildes in filenames
external redirection
extracting from HTML
fetching from Perl scripts
putting HTML links around
transparently storing information in
use autouse pragma
use bytes pragma
use charnames pragma
use constant pragma
use lib pragma
use locale pragma
use operator
use overload pragma
use pragmas
2nd
trapping errors in
Usenet news messages
User Datagram Protocol
[See UDP] user interfaces
adding text to images
checking for waiting input
clearing the screen
controlling programs with Expect
determining window size
dialog boxes, creating with Tk
DOS shell window, removing
editing input
full-screen mode
graphing data
2nd
managing screen
manipulating terminal directly
menus, creating with Tk
multiscreen CGI scripts
reading from keyboard
reading passwords without echo
ringing terminal bell
tcapdemo program
testing programs if running interactively
text color
thumbnailing images
Tk resize events
User::pwent module
userstats program
usleep( )
UTF-8
2nd
utf8 I/O layer
utime( ), timestamps
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