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https://issues.apache.org/jira/browse/TINKERPOP-1234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15215969#comment-15215969
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Daniel Kuppitz commented on TINKERPOP-1234:
-------------------------------------------
Looks very good. IntelliJ's debugger was making fun of me, but switching to
{{System.out.println}} debugging solved all problems. Good stuff.
Question: Do we want {{CollaborativeFilterVertexProgram}} be part of TinkerPop?
Here's how it looks:
{code}
final Graph graph = TinkerFactory.createModern();
graph.vertices(1).next().addEdge("created", graph.vertices(5).next());
final GraphTraversalSource g = graph.traversal().withComputer();
g.V().as("a").out("created").in("created").where(neq("a")).
program(CollaborativeFilterVertexProgram.build().from("a").limit(10).property("cf").create(graph)).
dedup().valueMap().forEachRemaining(System.out::println);
{code}
Result:
{noformat}
{cf=[{4=2, 6=1}], name=[marko], age=[29]}
{cf=[{1=1, 4=1}], name=[peter], age=[35]}
{cf=[{1=2, 6=1}], name=[josh], age=[32]}
{noformat}
The {{cf}} property contains a map of the 10 highest weighted co-workers of
each person (map key is the id of the other person, map value is the count /
weight):
* marko's co-workers: josh (id: 4, weight: 2), peter (id: 6, weight: 1)
* peter's co-workers: marko (id: 1, weight: 1), josh (id: 4, weight: 1)
* josh's co-workers: marko (id: 1, weight: 2), peter (id: 6, weight: 1)
> program() step that takes arbitrary vertex programs
> ---------------------------------------------------
>
> Key: TINKERPOP-1234
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1234
> Project: TinkerPop
> Issue Type: Improvement
> Components: process
> Affects Versions: 3.2.0-incubating
> Reporter: Daniel Kuppitz
> Assignee: Marko A. Rodriguez
>
> In 3.2 VertexPrograms like {{PageRankVertexProgram}} will have a dedicated
> step that allows to do things like {{g.V().out().out().pageRank()}}. Would be
> nice to have a general step {{program()}}, so that we can do the same thing
> with any {{VertexProgam}}, e.g.
> {code}
> // pre-calculate "users who bought this, also bought" and create uwbt-edges
> for the top 100 results per vertex
> g.V().as("a").in("bought").out("bought").where(neq("a")).as("b").select("a","b").
>
> program(CollaborativeFilterVertexProgram.build().source("a").target("b").limit(100).edgeLabel("uwbt").weightProperty("weight").create())
> {code}
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