NAME

Queue::Base - Simple OO style queue implementation.

VERSION

version 2.200

SYNOPSIS

    use Queue::Base;

    # construction
    my $queue = new Queue::Base;
    # or
    my $queue = new Queue::Base(\@elements);

    # add a new element to the queue
    $queue->add($element);

    # remove the next element from the queue
    if (! $queue->empty) {
        my $element = $queue->remove;
    }

    # or
    $element = $queue->remove;
    if (defined $element) {
        # do some processing here
    }

    # add/remove more than just one element
    $queue->add($elem1, $elem2 ...)
    # and
    @elements = $queue->remove(5);

DESCRIPTION

The Queue::Base is a simple implementation for queue structures using an OO interface. Provides basic functionality: nothing less - nothing more.

METHODS

Constructor

new [ELEMENTS]

Creates a new empty queue.

ELEMENTS is an array reference with elements the queue to be initialized with.

Methods

add [LIST_OF_ELEMENTS]

Adds the LIST OF ELEMENTS to the end of the queue.

remove [NUMBER_OF_ELEMENTS]

In scalar context it returns the first element from the queue.

In array context it attempts to return NUMBER_OF_ELEMENTS requested; when NUMBER_OF_ELEMENTS is not given, it defaults to 1.

remove_all

Returns an array with all the elements in the queue, and clears the queue.

size

Returns the size of the queue.

empty

Returns whether the queue is empty, which means its size is 0.

clear

Removes all elements from the queue.

CAVEATS

The module works only with scalar values. If you want to use more complex structures (and there's a big change you want that) please use references, which in perl5 are basically scalars.

AUTHOR

Alexei Znamensky <russoz@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2011 by Farkas Arpad.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

SUPPORT

Perldoc

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

  perldoc Queue::Base

Websites

The following websites have more information about this module, and may be of help to you. As always, in addition to those websites please use your favorite search engine to discover more resources.

BUGS AND LIMITATIONS

No bugs have been reported.

Please report any bugs or feature requests through the web interface at http://github.com/russoz/Queue-Base/issues.

AVAILABILITY

The latest version of this module is available from the Comprehensive Perl Archive Network (CPAN). Visit http://www.perl.com/CPAN/ to find a CPAN site near you, or see http://search.cpan.org/dist/Queue-Base/.

The development version lives at http://github.com/russoz/Queue-Base and may be cloned from git://github.com/russoz/Queue-Base.git. Instead of sending patches, please fork this project using the standard git and github infrastructure.

DISCLAIMER OF WARRANTY

BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.