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Changes  view on Meta::CPAN

1.02 2014-06-30 NEILB
    - Updated github repo URL after changing my github username
    - Added Algorithm::Damm and Math::CheckDigits to SEE ALSO
    - Fixed errors in pod: using c<...> instead of C<...> and
      not escaping the > character.
    - Added [MetaJSON] to dist.ini so META.json is included in releases

1.01 2014-06-30 NEILB

    - Added SEE ALSO section with links to other LUHN modules.
    - Renamed CHANGES to Changes and reformatted as per CPAN::Changes::Spec
    - Moved LUHN.pm to lib/Algorithm/LUHN.pm, as per convention
    - Switched to Dist::Zilla and set min perl version to 5.006
    - Improved doc for is_valid(), in response to RT#43842
    - Added github repo to pod

1.00 2002-03-26 TAYERS

    - Fixed linguistic problem in error message
      ("not correct" vs.  "incorrect").

lib/Algorithm/LUHN.pm  view on Meta::CPAN

  }

  Algorithm::LUHN::valid_chars(map {$_ => ord($_)-ord('A')+10} A..Z);
  $c = check_digit("A2C4E6G8");
  print "It worked again\n" if is_valid("A2C4E6G8$c");

=head1 DESCRIPTION

This module calculates the Modulus 10 Double Add Double checksum, also known as
the LUHN Formula. This algorithm is used to verify credit card numbers and
Standard & Poor's security identifiers such as CUSIP's and CSIN's.

You can find plenty of information about the algorithm by searching the web for
"modulus 10 double add double".

=head1 FUNCTION

=over 4

=cut

lib/Algorithm/LUHN.pm  view on Meta::CPAN

against a card number.

L<Algorithm::Damm> implements a different kind of check digit algorithm,
the L<Damm algorithm|https://en.wikipedia.org/wiki/Damm_algorithm>
(Damm, not Damn).

L<Math::CheckDigits> implements yet another approach to check digits.

I have also written a
L<review of LUHN modules|http://neilb.org/reviews/luhn.html>,
which covers them in more detail than this section.

=head1 REPOSITORY

L<https://github.com/neilb/Algorithm-LUHN>

=head1 AUTHOR

This module was written by
Tim Ayers (http://search.cpan.org/search?author=TAYERS).