String-Palindrome is a project mainly written in Perl, it's free.
CPAN module that determines if a string is a palindrome
=head1 NAME
String::Palindrome - Determine if a string is a palindrome
=head1 VERSION
version 2.000001
=head1 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=head1 EXPORTS
=over 4
=item *
is_palindrome
=back
=head1 FUNCTIONS
=head2 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.
=encoding utf8
=head1 INSTALLATION
See perlmodinstall for information and options on installing Perl modules.
=head1 AUTHOR
Adam Lesperance [email protected]
=for :stopwords cpan testmatrix url annocpan anno bugtracker rt cpants kwalitee diff irc mailto metadata placeholders
=head1 SUPPORT
=head2 Perldoc
You can find documentation for this module with the perldoc command.
perldoc String::Palindrome
=head2 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.
=over 4
=item *
Search CPAN
The default CPAN search engine, useful to view POD in HTML format.
Lhttp://search.cpan.org/dist/String-Palindrome
=item *
RT: CPAN's Bug Tracker
The RT ( Request Tracker ) website is the default bug/issue tracking system for CPAN.
Lhttp://rt.cpan.org/NoAuth/Bugs.html?Dist=String-Palindrome
=item *
AnnoCPAN
The AnnoCPAN is a website that allows community annonations of Perl module documentation.
Lhttp://annocpan.org/dist/String-Palindrome
=item *
CPAN Ratings
The CPAN Ratings is a website that allows community ratings and reviews of Perl modules.
Lhttp://cpanratings.perl.org/d/String-Palindrome
=item *
CPAN Forum
The CPAN Forum is a web forum for discussing Perl modules.
Lhttp://cpanforum.com/dist/String-Palindrome
=item *
CPANTS
The CPANTS is a website that analyzes the Kwalitee ( code metrics ) of a distribution.
Lhttp://cpants.perl.org/dist/overview/String-Palindrome
=item *
CPAN Testers
The CPAN Testers is a network of smokers who run automated tests on uploaded CPAN distributions.
Lhttp://www.cpantesters.org/distro/S/String-Palindrome
=item *
CPAN Testers Matrix
The CPAN Testers Matrix is a website that provides a visual way to determine what Perls/platforms PASSed for a distribution.
Lhttp://matrix.cpantesters.org/?dist=String-Palindrome
=item *
CPAN Testers Dependencies
The CPAN Testers Dependencies is a website that shows a chart of the test results of all dependencies for a distribution.
Lhttp://deps.cpantesters.org/?module=String::Palindrome
=back
=head2 Bugs / Feature Requests
Please report any bugs or feature requests by email to C
=head2 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 :)
Lhttps://github.com/lespea/string-palindrome
git clone git://github.com/lespea/string-palindrome.git
=head1 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.
=head1 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.