[librecat-dev] Doing math calculations inside a Catmandu fix

[Patrick Hochstenbach]

Dear Martina,

Perl fixes have a very limited support for calculations. But with the perlcode fix you can do any kind of calculation possible in Perl (and that is a lot).

E.g. here is a way  to add 1 to the year field in the MARC 008/07-10 tag:

# copy 008 date to the 'date' field

marc_map(008/07-10,date)

# do some calculation

perlcode(myscript.pl)

# return the 'date' value back into the date field

marc_set(008/07-10,$.date)

where myscript.pl is a file that contains:


sub {

    my $data = shift;



    $data->{date} = $data->{date} + 1;



    return $data;

}

BR
Patrick
________________________________
From: librecat-dev-bounces at lists.uni-bielefeld.de <librecat-dev-bounces at lists.uni-bielefeld.de> on behalf of Siebert, Dr. Martina <Martina.Siebert at sbb.spk-berlin.de>
Sent: 27 October 2023 14:25
To: librecat-dev at lists.uni-bielefeld.de <librecat-dev at lists.uni-bielefeld.de>
Subject: [librecat-dev] Doing math calculations inside a Catmandu fix


Dear all,



I am stuck with this problem:

I only have a date in Taiwan Republican counting in my data and need a Georgian date for PICA+.

How do I add 1911 to the value 112 to get 2023?



Best,

Martina



______________________________________________

Dr. Martina Siebert

Ostasienabteilung | CrossAsia

Staatsbibliothek zu Berlin – Preußischer Kulturbesitz



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