Adam Lesperance > String-Palindrome-2.000001 > String::Palindrome

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Module Version: 2.000001   Source  

NAME ^

String::Palindrome - Determine if a string is a palindrome

VERSION ^

version 2.000001

SYNOPSIS ^

    use String::Palindrome qw/ is_palindrome /;


    #  Simple strings

    my $is     = 'abccba';
    my $is_not = 'abcdef';

    is_palindrome( $is      );  # 1

    is_palindrome( $is_not  );  # 0

    is_palindrome( {a => 1} );  # undef
    is_palindrome(          );  # undef



    #  Arrays

    my @is     = qw/ a ab cc ab a /;
    my @is_not = qw/ a ab cc a ba /;

    is_palindrome(  @is     );  # 1
    is_palindrome( \@is     );  # 1

    is_palindrome(  @is_not );  # 0
    is_palindrome( \@is_not );  # 0

    is_palindrome( []       );  # undef

EXPORTS ^

FUNCTIONS ^

is_palindrome

Returns true if the string, array, or array_ref is a palindrome. If more than one parameter is passed to the function, then it will blindly assume that you want to treat them as an array to be tested. This means that you could, theoretically, pass in a palindrome of array_refs and it would still pass.

If only one arg is passed, then it is first checked to see if it is an array ref. If it is an array ref it is treated as a normal array. If it is a simple scalar, then it is treated as a string. If it is any other type of ref, then undef is returned. Additionally, a blank array ref also returns undef.

INSTALLATION ^

See perlmodinstall for information and options on installing Perl modules.

AUTHOR ^

Adam Lesperance <lespea@gmail.com>

SUPPORT ^

Perldoc

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

  perldoc String::Palindrome

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 / Feature Requests

Please report any bugs or feature requests by email to bug-string-palindrome at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=String-Palindrome. You will be automatically notified of any progress on the request by the system.

Source Code

The code is open to the world, and available for you to hack on. Please feel free to browse it and play with it, or whatever. If you want to contribute patches, please send me a diff or prod me to pull from your repository :)

https://github.com/lespea/string-palindrome

  git clone git://github.com/lespea/string-palindrome.git

COPYRIGHT AND LICENSE ^

This software is copyright (c) 2011 by Adam Lesperance.

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

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.

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