Added some more appendix items to recipes
Project: http://git-wip-us.apache.org/repos/asf/tinkerpop/repo Commit: http://git-wip-us.apache.org/repos/asf/tinkerpop/commit/79a24685 Tree: http://git-wip-us.apache.org/repos/asf/tinkerpop/tree/79a24685 Diff: http://git-wip-us.apache.org/repos/asf/tinkerpop/diff/79a24685 Branch: refs/heads/TINKERPOP-1602 Commit: 79a246851493e4f5a39644a9e86d828b39db0b2c Parents: 6971e64 Author: Stephen Mallette <sp...@genoprime.com> Authored: Tue Jan 10 12:13:59 2017 -0500 Committer: Stephen Mallette <sp...@genoprime.com> Committed: Tue Jan 10 12:13:59 2017 -0500 ---------------------------------------------------------------------- docs/src/recipes/appendix.asciidoc | 87 +++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/tinkerpop/blob/79a24685/docs/src/recipes/appendix.asciidoc ---------------------------------------------------------------------- diff --git a/docs/src/recipes/appendix.asciidoc b/docs/src/recipes/appendix.asciidoc index 369d049..6f9fb2c 100644 --- a/docs/src/recipes/appendix.asciidoc +++ b/docs/src/recipes/appendix.asciidoc @@ -136,4 +136,91 @@ g.V().values("age").fold(1, mult) // multiply all ages g.V().values("age").map(union(identity(), constant(-1)).sum()) // subtract 1 g.V().values("age").map(union(identity(), identity()).sum()) // multiply by 2 (simple) g.V().values("age").map(union(identity(), constant(2)).fold(1, mult)) // multiply by 2 (generally useful for multiplications by n): +---- + +[[appendix-g]] +_Dropping a vertex, as well as the vertices related to that dropped vertex that are connected by a "knows" edge in the +"modern" graph_ + +[gremlin-groovy,modern] +---- +g.V().has('name','marko').outE() +g.V().has('name','marko').sideEffect(out('knows').drop()).drop() +g.V().has('name','marko') +g.V(2,4,3) +---- + +[[appendix-h]] +_For the specified graph, find all neighbor vertices connected to "A" as filtered by datetime, those neighbor vertices +that don't have datetime vertices, and those neighbor vertices that have the label "dimon"._ + +[gremlin-groovy] +---- +g.addV().property("name", "A").as("a"). + addV().property("name", "B").as("b"). + addV().property("name", "C").as("c"). + addV().property("name", "D").as("d"). + addV().property("name", "E").as("e"). + addV("dimon").property("name", "F").as("f"). + addV().property("name", "G").as("g").property("date", 20160818). + addV().property("name", "H").as("h").property("date", 20160817). + addE("rel").from("a").to("b"). + addE("rel").from("a").to("c"). + addE("rel").from("a").to("d"). + addE("rel").from("a").to("e"). + addE("rel").from("c").to("f"). + addE("occured_at").from("d").to("g"). + addE("occured_at").from("e").to("h").iterate() +// D and E have a valid datetime +g.V().has("name", "A").out("rel"). + union(where(out("occured_at").has("date", gte(20160817))), + __.not(outE("occured_at")).coalesce(out().hasLabel("dimon"), identity())). + valueMap() +// only E has a valid date +g.V().has("name", "A").out("rel"). + union(where(out("occured_at").has("date", lte(20160817))), + __.not(outE("occured_at")).coalesce(out().hasLabel("dimon"), identity())). + valueMap() +// only D has a valid date +g.V().has("name", "A").out("rel"). + union(where(out("occured_at").has("date", gt(20160817))), + __.not(outE("occured_at")).coalesce(out().hasLabel("dimon"), identity())). + valueMap() +// neither D nor E have a valid date +g.V().has("name", "A").out("rel"). + union(where(out("occured_at").has("date", lt(20160817))), + __.not(outE("occured_at")).coalesce(out().hasLabel("dimon"), identity())). + valueMap() +---- + +[[appendix-i]] +_Use element labels in a `select`._ + +[gremlin-groovy,modern] +---- +g.V(1).as("a"). + both(). + map(group().by(label).by(unfold())).as("b"). + select("a","b"). + map(union(project("a").by(select("a")), select("b")). + unfold(). + group(). + by(select(keys)). + by(select(values))) +g.V().as("a"). + both(). + map(group().by(label).by(unfold())).as("b"). + select("a","b"). + group(). + by(select("a")). + by(select("b"). + group(). + by(select(keys)). + by(select(values).fold())). + unfold(). + map(union(select(keys).project("a").by(), select(values)). + unfold(). + group(). + by(select(keys).unfold()). + by(select(values).unfold().unfold().fold())) ---- \ No newline at end of file
