Combinations

Combinations

A combination joins or subtracts 2 to 10 of your lists on the same wiki.

Operation	Keeps
Union	Articles in any of the lists
Intersection	Articles in every list
Difference	Articles in the first list and in none of the others (order matters)

• It reads the latest ready version of each source and merges them in one pass, so huge lists cost no extra memory.
• When a source gets a new version, the combination is rebuilt automatically, once every source has built at least once.
• A source that never built fails the combination with its name in the reason.
• A list used by a combination can't be deleted until the combination is.

{"kind": "combination", "operation": "difference", "sources": [12, 31]}