perltoc.pod

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Delimiters

=item I'm having trouble matching over more than one line.  What's wrong?

=item How can I pull out lines between two patterns that are themselves on
different lines?

=item I put a regular expression into $/ but it didn't work. What's wrong?

=item How do I substitute case insensitively on the LHS, but preserving
case on the RHS?

=item How can I make C<\w> match national character sets?

=item How can I match a locale-smart version of C</[a-zA-Z]/>?

=item How can I quote a variable to use in a regexp?

=item What is C</o> really for?

=item How do I use a regular expression to strip C style comments from a
file?

=item Can I use Perl regular expressions to match balanced text?

=item What does it mean that regexps are greedy?  How can I get around it?

=item  How do I process each word on each line?

=item How can I print out a word-frequency or line-frequency summary?

=item How can I do approximate matching?

=item How do I efficiently match many regular expressions at once?

=item Why don't word-boundary searches with C<\b> work for me?

=item Why does using $&, $`, or $' slow my program down?

=item What good is C<\G> in a regular expression?

=item Are Perl regexps DFAs or NFAs?  Are they POSIX compliant?

=item What's wrong with using grep or map in a void context?

=item How can I match strings with multibyte characters?

=back

=item AUTHOR AND COPYRIGHT

=head2 perlfaq7 - Perl Language Issues ($Revision: 1.21 $, $Date:
1998/06/22 15:20:07 $)

=item DESCRIPTION

=over

=item Can I get a BNF/yacc/RE for the Perl language?

=item What are all these $@%* punctuation signs, and how do I know when to
use them?

=item Do I always/never have to quote my strings or use semicolons and
commas?

=item How do I skip some return values?

=item How do I temporarily block warnings?

=item What's an extension?

=item Why do Perl operators have different precedence than C operators?

=item How do I declare/create a structure?

=item How do I create a module?

=item How do I create a class?

=item How can I tell if a variable is tainted?

=item What's a closure?

=item What is variable suicide and how can I prevent it?

=item How can I pass/return a {Function, FileHandle, Array, Hash, Method,
Regexp}?

Passing Variables and Functions, Passing Filehandles, Passing Regexps,
Passing Methods

=item How do I create a static variable?

=item What's the difference between dynamic and lexical (static) scoping?
Between local() and my()?

=item How can I access a dynamic variable while a similarly named lexical
is in scope?

=item What's the difference between deep and shallow binding?

=item Why doesn't "my($foo) = <FILE>;" work right?

=item How do I redefine a builtin function, operator, or method?

=item What's the difference between calling a function as &foo and foo()?

=item How do I create a switch or case statement?

=item How can I catch accesses to undefined variables/functions/methods?

=item Why can't a method included in this same file be found?

=item How can I find out my current package?

=item How can I comment out a large block of perl code?

=back

=item AUTHOR AND COPYRIGHT

=head2 perlfaq8 - System Interaction ($Revision: 1.25 $, $Date: 1998/07/05
15:07:20 $)

=item DESCRIPTION

=over

=item How do I find out which operating system I'm running under?

=item How come exec() doesn't return?

=item How do I do fancy stuff with the keyboard/screen/mouse?

Keyboard, Screen, Mouse

=item How do I print something out in color?

=item How do I read just one key without waiting for a return key?

=item How do I check whether input is ready on the keyboard?

=item How do I clear the screen?

=item How do I get the screen size?

=item How do I ask the user for a password?

=item How do I read and write the serial port?

lockfiles, open mode, end of line, flushing output, non-blocking input

=item How do I decode encrypted password files?

=item How do I start a process in the background?

STDIN, STDOUT, and STDERR are shared, Signals, Zombies

=item How do I trap control characters/signals?

=item How do I modify the shadow password file on a Unix system?

=item How do I set the time and date?

=item How can I sleep() or alarm() for under a second?

=item How can I measure time under a second?

=item How can I do an atexit() or setjmp()/longjmp()? (Exception handling)

=item Why doesn't my sockets program work under System V (Solaris)? What
does the error message "Protocol not supported" mean?

=item How can I call my system's unique C functions from Perl?

=item Where do I get the include files to do ioctl() or syscall()?

=item Why do setuid perl scripts complain about kernel problems?

=item How can I open a pipe both to and from a command?

=item Why can't I get the output of a command with system()?

=item How can I capture STDERR from an external command?

=item Why doesn't open() return an error when a pipe open fails?

=item What's wrong with using backticks in a void context?

=item How can I call backticks without shell processing?

=item Why can't my script read from STDIN after I gave it EOF (^D on Unix,
^Z on MS-DOS)?

=item How can I convert my shell script to perl?

=item Can I use perl to run a telnet or ftp session?

=item How can I write expect in Perl?

=item Is there a way to hide perl's command line from programs such as
"ps"?

=item I {changed directory, modified my environment} in a perl script.	How
come the change disappeared when I exited the script?  How do I get my
changes to be visible?

Unix

=item How do I close a process's filehandle without waiting for it to
complete?

=item How do I fork a daemon process?

=item How do I make my program run with sh and csh?

=item How do I find out if I'm running interactively or not?

=item How do I timeout a slow event?

=item How do I set CPU limits?

=item How do I avoid zombies on a Unix system?

=item How do I use an SQL database?

=item How do I make a system() exit on control-C?

=item How do I open a file without blocking?

=item How do I install a CPAN module?

=item What's the difference between require and use?

=item How do I keep my own module/library directory?

=item How do I add the directory my program lives in to the module/library
search path?

=item How do I add a directory to my include path at runtime?

=back

=item AUTHOR AND COPYRIGHT

=head2 perlfaq9 - Networking ($Revision: 1.20 $, $Date: 1998/06/22 18:31:09
$)

=item DESCRIPTION

=over

=item My CGI script runs from the command line but not the browser.   (500
Server Error)

=item How can I get better error messages from a CGI program?

=item How do I remove HTML from a string?

=item How do I extract URLs?

=item How do I download a file from the user's machine?  How do I open a
file on another machine?

=item How do I make a pop-up menu in HTML?

=item How do I fetch an HTML file?

=item How do I automate an HTML form submission?

=item How do I decode or create those %-encodings on the web?

=item How do I redirect to another page?

=item How do I put a password on my web pages?

=item How do I edit my .htpasswd and .htgroup files with Perl?

=item How do I make sure users can't enter values into a form that cause my
CGI script to do bad things?

=item How do I parse a mail header?

=item How do I decode a CGI form?

=item How do I check a valid mail address?

=item How do I decode a MIME/BASE64 string?

=item How do I return the user's mail address?

=item How do I send mail?

=item How do I read mail?

=item How do I find out my hostname/domainname/IP address?

=item How do I fetch a news article or the active newsgroups?

=item How do I fetch/put an FTP file?

=item How can I do RPC in Perl?

=back

=item AUTHOR AND COPYRIGHT

=head2 perldelta - what's new for perl5.005

=item DESCRIPTION

=item About the new versioning system

=item Incompatible Changes

=over

=item WARNING:  This version is not binary compatible with Perl 5.004.

=item Default installation structure has changed

=item Perl Source Compatibility

=item C Source Compatibility

Core sources now require ANSI C compiler, All Perl global variables must
now be referenced with an explicit prefix, Enabling threads has source
compatibility issues

=item Binary Compatibility

=item Security fixes may affect compatibility

=item Relaxed new mandatory warnings introduced in 5.004

=item Licensing

=back

=item Core Changes

=over

=item Threads

=item Compiler

=item Regular Expressions

Many new and improved optimizations, Many bug fixes, New regular expression
constructs, New operator for precompiled regular expressions, Other
improvements, Incompatible changes

=item   Improved malloc()

=item Quicksort is internally implemented

=item Reliable signals

=item Reliable stack pointers

=item More generous treatment of carriage returns

=item Memory leaks

=item Better support for multiple interpreters

=item Behavior of local() on array and hash elements is now well-defined

=item C<%!> is transparently tied to the L<Errno> module

=item Pseudo-hashes are supported

=item C<EXPR foreach EXPR> is supported

=item Keywords can be globally overridden

=item C<$^E> is meaningful on Win32

=item C<foreach (1..1000000)> optimized

=item C<Foo::> can be used as implicitly quoted package name

=item C<exists $Foo::{Bar::}> tests existence of a package

=item Better locale support

=item Experimental support for 64-bit platforms

=item prototype() returns useful results on builtins

=item Extended support for exception handling

=item Re-blessing in DESTROY() supported for chaining DESTROY() methods

=item All C<printf> format conversions are handled internally

=item New C<INIT> keyword

=item New C<lock> keyword

=item New C<qr//> operator

=item C<our> is now a reserved word

=item Tied arrays are now fully supported

=item Tied handles support is better

=item 4th argument to substr

=item Negative LENGTH argument to splice

=item Magic lvalues are now more magical

=item E<lt>E<gt> now reads in records

=back

=item Supported Platforms

=over

=item New Platforms

=item Changes in existing support

=back

=item Modules and Pragmata

=over

=item New Modules

B, Data::Dumper, Errno, File::Spec, ExtUtils::Installed,
ExtUtils::Packlist, Fatal, IPC::SysV, Test, Tie::Array, Tie::Handle,
Thread, attrs, fields, re

=item Changes in existing modules

CGI, POSIX, DB_File, MakeMaker, CPAN, Cwd, Benchmark

=back

=item Utility Changes

=item Documentation Changes

=item New Diagnostics

Ambiguous call resolved as CORE::%s(), qualify as such or use &, Bad index
while coercing array into hash, Bareword "%s" refers to nonexistent
package, Can't call method "%s" on an undefined value, Can't coerce array
into hash, Can't goto subroutine from an eval-string, Can't localize
pseudo-hash element, Can't use %%! because Errno.pm is not available,
Cannot find an opnumber for "%s", Character class syntax [. .] is reserved
for future extensions, Character class syntax [: :] is reserved for future
extensions, Character class syntax [= =] is reserved for future extensions,
%s: Eval-group in insecure regular expression, %s: Eval-group not allowed,
use re 'eval', %s: Eval-group not allowed at run time, Explicit blessing to
'' (assuming package main), Illegal hex digit ignored, No such array field,
No such field "%s" in variable %s of type %s, Out of memory during
ridiculously large request, Range iterator outside integer range, Recursive
inheritance detected while looking for method '%s' in package '%s',
Reference found where even-sized list expected, Undefined value assigned to
typeglob, Use of reserved word "%s" is deprecated, perl: warning: Setting
locale failed

=item Obsolete Diagnostics

Can't mktemp(), Can't write to temp file for B<-e>: %s, Cannot open
temporary file

=item BUGS

=item SEE ALSO

=item HISTORY

=head2 perldata - Perl data types

=item DESCRIPTION

=over

=item Variable names

=item Context

=item Scalar values

=item Scalar value constructors

=item List value constructors

=item Typeglobs and Filehandles

=back

=head2 perlsyn - Perl syntax

=item DESCRIPTION

=over

=item Declarations

=item Simple statements

=item Compound statements

=item Loop Control

=item For Loops

=item Foreach Loops

=item Basic BLOCKs and Switch Statements

=item Goto

=item PODs: Embedded Documentation

=item Plain Old Comments (Not!)

=back

=head2 perlop - Perl operators and precedence

=item SYNOPSIS

=item DESCRIPTION

=over

=item Terms and List Operators (Leftward)