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algorithm::checkdigits::m10_005

CheckDigits::M10_005(3pm)				User Contributed Perl Documentation				 CheckDigits::M10_005(3pm)

NAME

       CheckDigits::M10_005 - compute check digits for Deutsche Post Identcode/Leitcode (DE)

SYNOPSIS

	 use Algorithm::CheckDigits;

	 $ic = CheckDigits('identcode_dp');

	 if ($ic->is_valid('21.802 580.906 6')) {
	       # do something
	 }

	 $cn = $ic->complete('21.802 580.906');
	 # $cn = '21.802 580.9066'

	 $cd = $ic->checkdigit('21.802 580.906 6');
	 # $cd = '6'

	 $bn = $ic->basenumber('21.802 580.906 6');
	 # $bn = '21.802 580.906'

DESCRIPTION

   ALGORITHM
       1.  Beginning left all numbers are weighted alternatively 4 and 9.

       2.  The sum of all products is computed.

       3.  The sum of step 3 ist taken modulo 10.

       4.  The check digit is the difference between 10 and the number from step 3.

   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::M10_005(3pm)

Shell Programming and Scripting