algorithm::checkdigits::mxx_002(3pm) [debian man page]

CheckDigits::MXX_002(3pm)				User Contributed Perl Documentation				 CheckDigits::MXX_002(3pm)

NAME

       CheckDigits::MXX_002 - compute check digits for CAS

SYNOPSIS

	 use Algorithm::CheckDigits;

	 $cas = CheckDigits('cas');

	 if ($cas->is_valid('1333-74-0')) {
	       # do something
	 }

	 $cn = $cas->complete('1333-74-');
	 # $cn = '1333-74-0'

	 $cd = $cas->checkdigit('1333-74-0');
	 # $cd = '0'

	 $bn = $cas->basenumber('1333-74-0');
	 # $bn = '1333-74-'

DESCRIPTION

   ALGORITHM
       1.  Beginning right with the second digit all digits are weighted ascending starting with 1.

       2.  The sum of those products is computed.

       3.  The checksum is the last digit of the sum from step 2 (modulo 10).

   METHODS
       is_valid($number)
	   Returns true only if $number consists solely of numbers and the last digit is a valid check digit according to the algorithm given
	   above.

	   Returns false otherwise,

       complete($number)
	   The check digit for $number is computed and concatenated to the end of $number.

	   Returns the complete number with check digit or '' if $number does not consist solely of digits and spaces.

       basenumber($number)
	   Returns the basenumber of $number if $number has a valid check digit.

	   Return '' otherwise.

       checkdigit($number)
	   Returns the checkdigit of $number if $number has a valid check digit.

	   Return '' otherwise.

   EXPORT
       None by default.

AUTHOR

       Mathias Weidner, <mathias@weidner.in-bad-schmiedeberg.de>

THANKS

       Aaron W. West pointed me to a fault in the computing of the check digit.

       HERMIER Christophe made me aware that CAS is now assigning 10-digit CAS Registry Numbers (http://www.cas.org/newsevents/10digitrn.html)

SEE ALSO

       perl, CheckDigits, www.pruefziffernberechnung.de, www.cas.org http://www.cas.org/expertise/cascontent/registry/checkdig.html

perl v5.10.0							    2008-05-17						 CheckDigits::MXX_002(3pm)

Check Out this Related Man Page

CheckDigits::M11_002(3pm)				User Contributed Perl Documentation				 CheckDigits::M11_002(3pm)

NAME

       CheckDigits::M11_002 - compute check digits for PZN (DE)

SYNOPSIS

	 use Algorithm::CheckDigits;

	 $pzn = CheckDigits('pzn');

	 if ($pzn->is_valid('4877800')) {
	       # do something
	 }

	 $cn = $pzn->complete('487780');
	 # $cn = '4877800'

	 $cd = $pzn->checkdigit('4877800');
	 # $cd = '0'

	 $bn = $pzn->basenumber('4877800');
	 # $bn = '487780'

DESCRIPTION

   ALGORITHM
       1.  From left to right beginning with the first position all digits are multiplied with 2,3,4,...

       2.  The sum of all products is computed.

       3.  The checkdigit ist the sum of step 2 taken modulo 11.

       4.  If the checkdigit is '10' the whole number is not taken as a PZN.

   METHODS
       is_valid($number)
	   Returns true only if $number consists solely of numbers and the last digit is a valid check digit according to the algorithm given
	   above.

	   Returns false otherwise,

       complete($number)
	   The check digit for $number is computed and concatenated to the end of $number.

	   Returns the complete number with check digit or '' if $number does not consist solely of digits and spaces.

       basenumber($number)
	   Returns the basenumber of $number if $number has a valid check digit.

	   Return '' otherwise.

       checkdigit($number)
	   Returns the checkdigit of $number if $number has a valid check digit.

	   Return '' otherwise.

   EXPORT
       None by default.

AUTHOR

       Mathias Weidner, <mathias@weidner.in-bad-schmiedeberg.de>

SEE ALSO

       perl, CheckDigits, www.pruefziffernberechnung.de.

perl v5.10.0							    2008-05-17						 CheckDigits::M11_002(3pm)

Linux and UNIX Man Pages

algorithm::checkdigits::mxx_002(3pm) [debian man page]

Check Out this Related Man Page