J. J. Merelo-Guervós
and 1 contributors

# NAME

Algorithm::MasterMind::Sequential_Alt - Tests each combination in turn, alternating with the beginning and end of the sequence.

# SYNOPSIS

``````    use Algorithm::MasterMind::Sequential_Alt;

my \$secret_code = 'ADCB';
my @alphabet = qw( A B C D E F );
my \$solver = new Algorithm::MasterMind::Sequential_Alt { alphabet => \@alphabet,
length => length( \$secret_code ) };
``````

# DESCRIPTION

Test combinations in turn, starting by A x length. Should find the solution, but complexity increases with size. Not very efficient, but a bit better than Algorithm::MasterMind::Sequential

# INTERFACE

## initialize()

Called from base class, mainly

## new ( \$options )

This function, and all the rest, are directly inherited from base

## issue_first ()

Issues the first combination, which might be generated in a particular way

## issue_next()

Issues the next combination

## feedback()

Obtain the result to the last combination played

## guesses()

Total number of guesses

## number_of_rules ()

Returns the number of rules in the algorithm

## rules()

Returns the rules (combinations, blacks, whites played so far) y a reference to array

## matches( \$string )

Returns a hash with the number of matches, and whether it matches every rule with the number of blacks and whites it obtains with each of them

## next_string( \$string )

Computes the next string taking into account the limited alphabet, and return the computed string

## prev_string( \$string )

Computes the previous string taking into account the limited alphabet, and returns it.

## prev_letter ( \$character )

Returns the previous letter considering the limited alphabet. Needed because magic auto-decrement does not work.

# AUTHOR

JJ Merelo `<jj@merelo.net>`

# LICENCE AND COPYRIGHT

Copyright (c) 2009, JJ Merelo `<jj@merelo.net>`. All rights reserved.

This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.

# 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.