NAME String::Palindrome - Determine if a string is a palindrome VERSION version 1.02 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 * is_palindrome FUNCTIONS is_palindrome Returns true if the string, array_ref, or array 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. AUTHOR Adam Lesperance SUPPORT You can find documentation for this module with the perldoc command. perldoc String::Palindrome Websites * Search CPAN * AnnoCPAN: Annotated CPAN documentation * CPAN Ratings * CPAN Forum * RT: CPAN's Bug Tracker * CPANTS Kwalitee * CPAN Testers Results * CPAN Testers Matrix * Source Code Repository 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 :) Bugs Please report any bugs or feature requests to "bug-string-palindrome at rt.cpan.org", or through the web interface at . I will be notified, and then you'll automatically be notified of progress on your bug as I make changes. COPYRIGHT AND LICENSE This software is copyright (c) 2010 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.