NAME
   List::MoreUtils - Provide the stuff missing in List::Util

SYNOPSIS
       use List::MoreUtils qw(:tassilo); # use as initially thought
       use List::MoreUtils qw(:alias); # use alias changes
       use List::MoreUtils qw(:modern); # use compat mode to List::Util
       use List::MoreUtils qw(:sno); # use nowadays added stuff

       use List::MoreUtils qw(:all); # use all with precedence 'alias', 'sno', 'tassilo', 'modern';

       use List::MoreUtils any => { impl => 'modern' },
                           all =>  { impl => 'tassilo' },
                           'none', 'notall', # above precedence
                           'firstidx' => { impl => 'tassilo' },
                           all => { impl => 'modern', as => 'modern_all' };

DESCRIPTION
   List::MoreUtils provides some trivial but commonly needed functionality
   on lists which is not going to go into List::Util.

   All of the below functions are implementable in only a couple of lines
   of Perl code. Using the functions from this module however should give
   slightly better performance as everything is implemented in C. The
   pure-Perl implementation of these functions only serves as a fallback in
   case the C portions of this module couldn't be compiled on this machine.

EXPORTS
   Nothing by default. To import all of this module's symbols, do the
   conventional

       use List::MoreUtils ':all';

   It may make more sense though to only import the stuff your program
   actually needs:

       use List::MoreUtils qw{ any firstidx };

ENVIRONMENT
   When "LIST_MOREUTILS_PP" is set, the module will always use the
   pure-Perl implementation and not the XS one. This environment variable
   is really just there for the test-suite to force testing the Perl
   implementation, and possibly for reporting of bugs. I don't see any
   reason to use it in a production environment.

BUGS
   There is a problem with a bug in 5.6.x perls. It is a syntax error to
   write things like:

       my @x = apply { s/foo/bar/ } qw{ foo bar baz };

   It has to be written as either

       my @x = apply { s/foo/bar/ } 'foo', 'bar', 'baz';

   or

       my @x = apply { s/foo/bar/ } my @dummy = qw/foo bar baz/;

   Perl 5.5.x and Perl 5.8.x don't suffer from this limitation.

   If you have a functionality that you could imagine being in this module,
   please drop me a line. This module's policy will be less strict than
   List::Util's when it comes to additions as it isn't a core module.

   When you report bugs, it would be nice if you could additionally give me
   the output of your program with the environment variable
   "LIST_MOREUTILS_PP" set to a true value. That way I know where to look
   for the problem (in XS, pure-Perl or possibly both).

SUPPORT
   Bugs should always be submitted via the CPAN bug tracker.

   You can find documentation for this module with the perldoc command.

       perldoc List::MoreUtils

   You can also look for information at:

   *   RT: CPAN's request tracker

       <http://rt.cpan.org/NoAuth/Bugs.html?Dist=List-MoreUtils>

   *   AnnoCPAN: Annotated CPAN documentation

       <http://annocpan.org/dist/List-MoreUtils>

   *   CPAN Ratings

       <http://cpanratings.perl.org/l/List-MoreUtils>

   *   CPAN Search

       <http://search.cpan.org/dist/List-MoreUtils/>

   *   Got Repository

       <https://github.com/perl5-utils/List-MoreUtils>

 Where can I go for help?
   If you have a bug report, a patch or a suggestion, please open a new
   report ticket at CPAN (but please check previous reports first in case
   your issue has already been addressed).

   Report tickets should contain a detailed description of the bug or
   enhancement request and at least an easily verifiable way of reproducing
   the issue or fix. Patches are always welcome, too - and it's cheap to
   send pull-requests on GitHub. Please keep in mind that code changes are
   more likely accepted when they're bundled with an approving test.

   If you think you've found a bug then please read "How to Report Bugs
   Effectively" by Simon Tatham:
   <http://www.chiark.greenend.org.uk/~sgtatham/bugs.html>.

 Where can I go for help with a concrete version?
   Bugs and feature requests are accepted against the latest version only.
   To get patches for earlier versions, you need to get an agreement with a
   developer of your choice - who may or not report the issue and a
   suggested fix upstream (depends on the license you have chosen).

 Business support and maintenance
   For business support you can contact Jens via his CPAN email address
   rehsackATcpan.org. Please keep in mind that business support is neither
   available for free nor are you eligible to receive any support based on
   the license distributed with this package.

THANKS
   Credits go to a number of people: Steve Purkis for giving me namespace
   advice and James Keenan and Terrence Branno for their effort of keeping
   the CPAN tidier by making List::Utils obsolete.

   Brian McCauley suggested the inclusion of apply() and provided the
   pure-Perl implementation for it.

   Eric J. Roode asked me to add all functions from his module
   "List::MoreUtil" into this one. With minor modifications, the pure-Perl
   implementations of those are by him.

   The bunch of people who almost immediately pointed out the many problems
   with the glitchy 0.07 release (Slaven Rezic, Ron Savage, CPAN testers).

   A particularly nasty memory leak was spotted by Thomas A. Lowery.

   Lars Thegler made me aware of problems with older Perl versions.

   Anno Siegel de-orphaned each_arrayref().

   David Filmer made me aware of a problem in each_arrayref that could
   ultimately lead to a segfault.

   Ricardo Signes suggested the inclusion of part() and provided the
   Perl-implementation.

   Robin Huston kindly fixed a bug in perl's MULTICALL API to make the
   XS-implementation of part() work.

TODO
   A pile of requests from other people is still pending further processing
   in my mailbox. This includes:

   *   List::Util export pass-through

       Allow List::MoreUtils to pass-through the regular List::Util
       functions to end users only need to "use" the one module.

   *   uniq_by(&@)

       Use code-reference to extract a key based on which the uniqueness is
       determined. Suggested by Aaron Crane.

   *   delete_index

   *   random_item

   *   random_item_delete_index

   *   list_diff_hash

   *   list_diff_inboth

   *   list_diff_infirst

   *   list_diff_insecond

       These were all suggested by Dan Muey.

   *   listify

       Always return a flat list when either a simple scalar value was
       passed or an array-reference. Suggested by Mark Summersault.

SEE ALSO
   List::Util

AUTHOR
   Jens Rehsack <rehsack AT cpan.org>

   Adam Kennedy <[email protected]>

   Tassilo von Parseval <[email protected]>

COPYRIGHT AND LICENSE
   Some parts copyright 2011 Aaron Crane.

   Copyright 2004 - 2010 by Tassilo von Parseval Copyright 2013 by Jens
   Rehsack

   This library is free software; you can redistribute it and/or modify it
   under the same terms as Perl itself, either Perl version 5.8.4 or, at
   your option, any later version of Perl 5 you may have available.

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