11-23-2011
Quote:
Originally Posted by
forroughuse
Can you please explain me how it works/run.
1~2s for line 1 and every 2nd line after that, substitute
/.* any number of any characters, followed by a space and
\([^ ]* [^ ]* [^ ]* [^ ]*\)(stored sub-pattern) any number of non-space characters followed by a space (*3), followed by any number of non-space characters (i.e. the last 4 fields in the line, space-separated).
/\1/ replace with the text that matched stored sub-pattern 1
This User Gave Thanks to CarloM For This Post:
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LEARN ABOUT DEBIAN
algorithm::checkdigits::m43_001
CheckDigits::M43_001(3pm) User Contributed Perl Documentation CheckDigits::M43_001(3pm)
NAME
CheckDigits::M43_001 - compute check digits for Code-39
SYNOPSIS
use Algorithm::CheckDigits;
$c39 = CheckDigits('code_39');
if ($c39->is_valid('AB-123K')) {
# do something
}
$cn = $c39->complete('AB-123');
# $cn = 'AB-123K'
$cd = $c39->checkdigit('AB-123K');
# $cd = 'K'
$bn = $c39->basenumber('AB-123K');
# $bn = 'AB-123'
DESCRIPTION
ALGORITHM
1. After replacing all non numeric letters with their respective values, the sum of all numbers is computers
2. The checkdigit is the sum from step 1 taken modulo 43.
METHODS
is_valid($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::M43_001(3pm)