CheckDigits::M10_010 - compute check digits for Postscheckkonti (CH)
use Algorithm::CheckDigits; $pck = CheckDigits('postcheckkonti'); if ($pck->is_valid('85-12345678-7')) { # do something } $cn = $pck->complete('85-12345678'); # $cn = '85-12345678-7' $cd = $pck->checkdigit('85-12345678-7'); # $cd = '7' $bn = $pck->basenumber('85-12345678-7'); # $bn = '85-12345678'
The sequence of digits is processed left to right. For the first digit we assume a carry forward of 0.
For each digit d(i) the carry forward cf(i) is the digit at the the position p in the sequence ( 0, 9, 4, 6, 8, 2, 7, 1, 3, 5 ), where p is (d(i) + cf(i-1)) modulo 10.
The check digit is the difference of the sum from step 3 to the next multiple of 10.
Returns true only if $number consists solely of numbers and the last digit is a valid check digit according to the algorithm given above.
$number
Returns false otherwise,
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.
Returns the basenumber of $number if $number has a valid check digit.
Return '' otherwise.
Returns the checkdigit of $number if $number has a valid check digit.
None by default.
Mathias Weidner, <mamawe@cpan.org>
<mamawe@cpan.org>
perl, CheckDigits, www.pruefziffernberechnung.de.
To install Algorithm::CheckDigits, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Algorithm::CheckDigits
CPAN shell
perl -MCPAN -e shell install Algorithm::CheckDigits
For more information on module installation, please visit the detailed CPAN module installation guide.