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)