反转Marklogic映射时出现问题

Question

While inverting MarkLogic map, the keys & values get swapped, however the values get de-duplicated. How can I avoid it?

Answer 1

I'm afraid you can't. MarkLogic map:map is a hash table, so keys are unique. When inverting it will merge keys of duplicate values:

-map:new((
  map:entry("a", (1, 2)),
  map:entry("b", (2, 3))
))

Depending on what you want to achieve, you might just want to iterate the map:map .

HTH!