[ownedbycats]

Originally Posted by ownedbycats

I think one of the ids in the second section is checking the original state of the column and not the updated one.

I figured it out! I added two lines between the clauses, and it updated the variables. I suppose this might be a case where using variables as a typing shortcut wasn't a good idea.

program:
	ids = $identifiers;
	mobi = select(ids, 'mobi-asin');
	amazon = select(ids, 'amazon');

	if 
		mobi && !amazon
	then 
		n = re(mobi, '(.*)', '\1');
		ids = list_union(ids, strcat('amazon:', n), ',')
	else
		ids
	fi;

	mobi = select(ids, 'mobi-asin');
	amazon = select(ids, 'amazon');

	if 
		mobi == amazon
	then
		ids = list_difference(ids, strcat('mobi-asin:', mobi), ',')
	else
		ids
	fi