table of contents
| Algorithm::CheckDigits::MXX_005(3) | User Contributed Perl Documentation | Algorithm::CheckDigits::MXX_005(3) |
NAME¶
CheckDigits::MXX_005 - compute check digits for ESR9 (CH)
SYNOPSIS¶
use Algorithm::CheckDigits;
$esr = CheckDigits('esr9');
if ($esr->is_valid('123456786')) {
# do something
}
$cn = $esr->complete('12345678');
# $cn = '123456786'
$cd = $esr->checkdigit('123456786');
# $cd = '6'
$bn = $esr->basenumber('123456786');
# $bn = '12345678'
DESCRIPTION¶
ALGORITHM¶
- 1.
- Digits are processed left to right. For the first digit applies the balance is 0.
- 2.
- The new balance is taken from the balance table according to the current balance (row) and the digit (column).
- 3.
- The check digit is the difference from the last balance to 10 taken modulo 10.
METHODS¶
- is_valid($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, "<mamawe@cpan.org>"
SEE ALSO¶
perl, CheckDigits, www.pruefziffernberechnung.de.
| 2021-11-17 | perl v5.26.1 |