[2/3] tinkerpop git commit: Added a basic sum/division recipe using sack CTR

[sp...@apache.org]

Added a basic sum/division recipe using sack CTR


Project: http://git-wip-us.apache.org/repos/asf/tinkerpop/repo
Commit: http://git-wip-us.apache.org/repos/asf/tinkerpop/commit/736cb261
Tree: http://git-wip-us.apache.org/repos/asf/tinkerpop/tree/736cb261
Diff: http://git-wip-us.apache.org/repos/asf/tinkerpop/diff/736cb261

Branch: refs/heads/master
Commit: 736cb261c493acc7831c761a8bc1c5351d1efba0
Parents: e9b364a
Author: Stephen Mallette <sp...@genoprime.com>
Authored: Wed Sep 13 11:16:16 2017 -0400
Committer: Stephen Mallette <sp...@genoprime.com>
Committed: Wed Sep 13 11:16:16 2017 -0400

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 docs/src/recipes/appendix.asciidoc | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
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http://git-wip-us.apache.org/repos/asf/tinkerpop/blob/736cb261/docs/src/recipes/appendix.asciidoc
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diff --git a/docs/src/recipes/appendix.asciidoc b/docs/src/recipes/appendix.asciidoc
index 22ce1a7..a65b8f8 100644
--- a/docs/src/recipes/appendix.asciidoc
+++ b/docs/src/recipes/appendix.asciidoc
@@ -174,6 +174,31 @@ g.withSack(0).V().values("age").sack(sum).sack(sum).sack() // multiply by 2 (sim
 g.withSack(0).V().values("age").sack(sum).sack(mult).by(constant(2)).sack() // multiply by 2 (generally useful for multiplications by n)
 ----
 
+_Method for doing a sum with division._
+
+[gremlin-groovy]
+----
+g.addV().property(id, "a").as("a").
+  addV().property(id, "b").as("b").
+  addE("link").from("a").to("b").
+  addE("link").from("b").to("a").
+  addE("link").from("b").to("a").iterate()
+g.withSack(0d).
+   V("a").as("a").
+   V("b").as("b").
+     project("ab", "ba").
+       by(inE("link").where(outV().as("a")).count()).
+       by(outE("link").where(inV().as("a")).count()).
+     sack(sum).by(select("ab")).
+     sack(div).by(select("ba")).
+     project("a", "b", "#(a,b)", "#(b,a)", "#(a,b) / #(b,a)").
+       by(select("a")).
+       by(select("b")).
+       by(select("ab")).
+       by(select("ba")).
+       by(sack())
+----
+
 [[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_