Merges associations using a combining function
Merge[{assoc1, assoc2, …}, f]
Merge[{key1 -> val1, key2 -> val2, …}, f]
Merge[f]
Merge[{<|a -> 1|>, <|a -> 2, b -> 3|>}, Total]
→ <|a -> 3, b -> 3|>Merge[{<|"a" -> 1|>, 7}, Total]
→
Merge::list1: The argument 7 is not a valid list of Associations or rules or lists of rules.
Merge[{<|a -> 1|>, 7}, Total]