Working with a list/array of objects about catmandu HOT 2 CLOSED

# use a temporary variable 
do list(path:_metadata.mods.identifier,var:a)
	if all_match(a._body,"^https://duepublico2.uni-due.de/receive/.*")
		copy_field(a._body,id)
	end
end

# copy all image URLs to a temporary array 
copy_field(_metadata.mods.location.*.url.*._body,tmp.$append)

# iterate through the temporary array
do list(path:tmp,var:b)
     if all_match(b,"^https://duepublico2.uni-due.de/rsc/thumbnail/.*")
        copy_field(b,image)
    end
end

# remove the temporary array
remove_field(tmp)

# keep just the two new fields
retain(id,image)

$ catmandu convert OAI --url https://duepublico2.uni-due.de/oer/oai --metadataPrefix mods --handler mods to YAML --fix mods.fix