[Noughty]

Basically these 4 columns manipulate shelves and tags. In tags I have 102 items, shelves about 118. That's why I created these other columns to make it neater. I categorize all items in tags and shelves into a few categories:
genre (40 items),
character (58 items),
mode (22 items),
and whatever is left (84 items).


GENRE:

program:
	list_union(
		list_intersection(field('tags'), '40 tags&shelves listed', ','),
		list_intersection(field('#shelf'), '40 tags&shelves listed', ','), 
		',')

CHARACTER:

the same as above just different tags,shelves listed. Total 58 items

MODE:

the same as above just different tags,shelves listed. Total 22 items

LEFTOVERS :

program:
list_sort(
   list_difference(
      list_union(field('#shelf'), field('tags'), ','),
      list_union(
         "delete", 
         strcat(field('#genre'), ',',
                field('#mode'), ',', 
                field('#character'), ',',
                field('#length')),
         ','), 
      ','),
   0, ',')

I just changed this one to, #length wasn't needed here, only word Short:

program:
list_sort(
   list_difference(
      list_union(field('#shelf'), field('tags'), ','),
      list_union(strcat('Short', ',',
        'delete'),
         strcat(field('#genre'), ',',
                field('#mode'), ',', 
                field('#character')),
         ','), 
      ','),
   0, ',')

And I have a few more columns like tags but they are simple columns.
Length has 4 values, status-6,managing-22, anthology-18 and a few more. But nothing major and with very few values.