table of contents
| CheckDigits::M10_010(3pm) | User Contributed Perl Documentation | CheckDigits::M10_010(3pm) |
NAME¶
CheckDigits::M10_010 - compute check digits for Postscheckkonti (CH)
SYNOPSIS¶
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');
# $bn = '85-12345678'
DESCRIPTION¶
ALGORITHM¶
- 1.
- The sequence of digits is processed left to right. For the first digit we assume a carry forward of 0.
- 2.
- For each digit d(i) the carry forward cf(i) is the digit at the the position p in the sequence ( 0, 9, 4, 6, 8, 2, 7, 1, 3, 5 ), where p is (d(i) + cf(i-1)) modulo 10.
- 3.
- The check digit is the difference of the sum from step 3 to the next multiple of 10.
METHODS¶
- is_valid($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, <mathias@weidner.in-bad-schmiedeberg.de>
SEE ALSO¶
perl, CheckDigits, www.pruefziffernberechnung.de.
| 2021-01-03 | perl v5.32.0 |