sim.jaccard

flex.sim.jaccard(list1, list2)

// Compare two tag lists
RETURN flex.sim.jaccard(['tag1', 'tag2', 'tag3'], ['tag2', 'tag3', 'tag4']) AS similarity

similarity
----------
0.5

// Find documents with similar tags to a reference document
MATCH (ref:Document {id: 'doc123'})
MATCH (other:Document)
WHERE other.id <> ref.id
WITH ref, other, flex.sim.jaccard(ref.tags, other.tags) AS similarity
WHERE similarity > 0.3
RETURN other.title, similarity
ORDER BY similarity DESC
LIMIT 10

// Find users with similar interests
MATCH (u1:User {id: $userId})
MATCH (u2:User)
WHERE u1 <> u2
WITH u1, u2, flex.sim.jaccard(u1.interests, u2.interests) AS match_score
WHERE match_score > 0.5
RETURN u2.name, u2.interests, match_score
ORDER BY match_score DESC