NAME

       Catmandu::Fix::Bind::list - a binder that loops over MARC fields

SYNOPSIS

           # 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

DESCRIPTION

       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

SEE ALSO

       Catmandu::Fix::Bind