Catmandu::Fix::Bind::mab_each(3) a binder that loops over MAB2 fields

SYNOPSIS


# Only add field 331 to the title when field 412 matches 'Heise'
do mab_each()
if mab_match("412","Heise")
mab_map("331",title)
end
end
# Delete all the 700 subject fields
do mab_each()
if mab_match("700",".*")
reject()
end
end

DESCRIPTION

The mab_each binder will iterate over each individual MAB2 field and execute the fixes only in context over each individual field.

If a MAB2 record contains: 

    705    $a775.05$c775
    705    $a702.08$c702

then the fix 

    do mab_each()
        mab_map("705a",subject.$append)
    end

will have the same effect as 

    mab_map("705a",subject.$append)

because "mab_map" by default loops over all repeated MAB2 fields. But the "mab_each" bind has the advantage to process fields in context. E.g. to only map fields where the subfield $c doesn't contain '702' you can write: 

    do mab_each()
        unless mab_match("705","702")
            mab_map("705",subject.$append)
        end
    end

AUTHOR

Johann Rolschewski <[email protected]>

COPYRIGHT AND LICENSE

This software is copyright (c) 2013 by Johann Rolschewski.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

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