CheckDigits::M11_009 - compute check digits NRIC (SG)
use Algorithm::CheckDigits; $nric = CheckDigits('nric_sg'); if ($nric->is_valid('S1234567D')) { # do something } $cn = $nric->complete('S1234567'); # $cn = 'S1234567D' $cd = $nric->checkdigit('S1234567D'); # $cd = 'D' $bn = $nric->basenumber('S1234567D'); # $bn = 'S1234567';
Beginning left every digit is weighted with 2, 7, 6, 5, 4, 3, 2
The weighted digits are added.
The sum from step 2 is taken modulo 11.
The checkdigit is 11 minus the sum from step 3 converted to a character according to the following table:
@cd = ('','A','B','C','D','E','F','G','H','I','Z','J', );
Returns true only if $number consists of seven digits (optional preceded by a letter out of 'F', 'G', 'S', 'T') followed by a valid letter according to the algorithm given above.
$number
Returns false otherwise,
The check letter for $number is computed and appended to the end of $number.
Returns the complete number with check digit or '' if $number does not consist solely of digits and letters.
Returns the basenumber of $number if $number has a valid check digit.
Return '' otherwise.
Returns '' if $number is valid.
Return undef otherwise.
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.