Catmandu::Fix::Bind::list − a binder that loops over MARC fields
# Only add the 720 field to the authors when the $e subfield contains a 'promotor' do marc_each() if marc_match("720e","promotor") marc_map("720ab",authors.$append) end end # Delete all the 500 fields do marc_each() if marc_match("500",".*") reject() end end
The marc_each binder will iterate over each individual MARC field and execute the fixes only in context over each individual field.
If a MARC record contains:
500 $aTest 500 $aTest2$eskip 500 $aTest3
then the fix
do marc_each() marc_map("500",note.$append) end
will have the same effect as
marc_map("500",note.$append)
because "marc_map" by default loops over all repeated MARC fields. But the "marc_each" bind has the advantage to process fields in context. E.g. to only map fields where the $e doesn’t contain ’skip’ you can write:
do marc_each() unless marc_match("500e",skip) marc_map("500",note.$append) end end
Catmandu::Fix::Bind