Cypher to find similar nodes without repeating matches - neo4j

Question

I am new to cypher. I want to find similar nodes without repeating matches.
Sample data
CREATE (r1:Repository {id:"repository1"})
CREATE (r2:Repository {id:"repository2"})
CREATE (r3:Repository {id:"repository3"})
CREATE (a1:Actor {id: "actor1"})
CREATE (a2:Actor {id: "actor2"})
CREATE (a3:Actor {id: "actor3"})
CREATE (o1:Organization {id:"organization1"})
CREATE (o2:Organization {id:"organization2"})
MATCH (a:Repository {id:"repository1"}) MATCH (b:Actor {id: 'actor1'})
CREATE (a)-[:IS_ACTOR]->(b)
MATCH (a:Repository {id:"repository1"}) MATCH (b:Actor {id: 'actor2'})
CREATE (a)-[:IS_ACTOR]->(b)
MATCH (a:Repository {id:"repository1"}) MATCH (b:Actor {id: 'actor3'})
CREATE (a)-[:IS_ACTOR]->(b)
MATCH (a:Repository {id:"repository1"}) MATCH (b:Organization {id:
'organization1'}) CREATE (a)-[:IN_ORGANIZATION]->(b)
MATCH (a:Repository {id:"repository2"}) MATCH (b:Actor {id: 'actor1'})
CREATE (a)-[:IS_ACTOR]->(b)
MATCH (a:Repository {id:"repository2"}) MATCH (b:Actor {id: 'actor2'})
CREATE (a)-[:IS_ACTOR]->(b)
MATCH (a:Repository {id:"repository2"}) MATCH (b:Organization {id:
'organization1'}) CREATE (a)-[:IN_ORGANIZATION]->(b)
MATCH (a:Repository {id:"repository3"}) MATCH (b:Actor {id: 'actor3'})
CREATE (a)-[:IS_ACTOR]->(b)
MATCH (a:Repository {id:"repository3"}) MATCH (b:Organization {id:
'organization2'}) CREATE (a)-[:IN_ORGANIZATION]->(b)
Cypher
MATCH (a)-[r1:IS_ACTOR|IN_ORGANIZATION]->(match)<-
[r2:IS_ACTOR|IN_ORGANIZATION]-(b)
where not a.id = b.id with a,b,count(match) as count, collect (match.id) as
connections, collect (type(r1)) as rel1
return a.id,b.id,count,connections,rel1 order by count desc
Result
a.id b.id count connections rel1
repository2 repository1 3 actor1,actor2,organization1 IS_ACTOR, IS_ACTOR,IN_ORGANIZATION
repository1 repository2 3 actor1,actor2,organization1 IS_ACTOR, IS_ACTOR,IN_ORGANIZATION
repository3 repository1 1 actor3 IS_ACTOR
repository1 repository3 1 actor3 IS_ACTOR
How can I remove row #2 & #4 from the result?
Based on response to a similar question I tried using filter but I get syntax error (cypher below)
MATCH (a)-[r1:IS_ACTOR|IN_ORGANIZATION]->(match)<-
[r2:IS_ACTOR|IN_ORGANIZATION]-(b)
with filter(x in connections where x <> b.id)
where not a.id = b.id with a,b,count(match) as count, collect (match.id) as
connections, collect (type(r1)) as rel1
return a.id,b.id,count,connections,rel1 order by count desc

Answer 1

You match the path once from both sides, something that you can do to force only one of those paths to be returned. Compare the id's so you put a and b in a fixed order and avoid the other combo.
MATCH (a)-[r1:IS_ACTOR|IN_ORGANIZATION]->(match)
<-[r2:IS_ACTOR|IN_ORGANIZATION]-(b)
where id(a) > id(b)
with a,b,count(match) as count,
collect (match.id) as connections, collect (type(r1)) as rel1
return a.id,b.id,count,connections,rel1 order by count desc