Comparing arrays in GROQ query to find intersections.

Can someone help me with line 5 - I'm trying to compare two arrays, one is the field allCheckinIds (an array of strings) and the other is a variable $userIds (also an array of strings). I'm trying to see whether there are at least one "intersection" between them.

Not sure if you mean something like this

Correct, but I would like to do it in the GROQ-query itself.

Comparing two arrays will require syntax like seen here , which uses the

count()

function and the parent operator. Presumably, it’ll be something like:

Great, thank you so much!