Add an appendix to the recipes. Useful for general example traversals that don't fit nicely into a specific recipe or under a specific step in the reference documentation.
Project: http://git-wip-us.apache.org/repos/asf/tinkerpop/repo Commit: http://git-wip-us.apache.org/repos/asf/tinkerpop/commit/043d1a3a Tree: http://git-wip-us.apache.org/repos/asf/tinkerpop/tree/043d1a3a Diff: http://git-wip-us.apache.org/repos/asf/tinkerpop/diff/043d1a3a Branch: refs/heads/TINKERPOP-1602 Commit: 043d1a3aa116b23a46cd1d77bed5ba3c0e4b77a2 Parents: d5404b8 Author: Stephen Mallette <sp...@genoprime.com> Authored: Mon Jan 9 15:19:34 2017 -0500 Committer: Stephen Mallette <sp...@genoprime.com> Committed: Mon Jan 9 15:19:34 2017 -0500 ---------------------------------------------------------------------- docs/src/recipes/index.asciidoc | 81 +++++++++++++++++++++++++++++++++++- 1 file changed, 80 insertions(+), 1 deletion(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/tinkerpop/blob/043d1a3a/docs/src/recipes/index.asciidoc ---------------------------------------------------------------------- diff --git a/docs/src/recipes/index.asciidoc b/docs/src/recipes/index.asciidoc index 8ffc358..2e88ac5 100644 --- a/docs/src/recipes/index.asciidoc +++ b/docs/src/recipes/index.asciidoc @@ -133,4 +133,83 @@ GitHub and JIRA are linked. As mentioned earlier in this section, the recipe wi committers prior to merging. This process may take several days to complete. We look forward to receiving your submissions! - +Appendix +======== + +Many of the recipes are based on questions and answers provided on the gremlin-users mailing list. This section +contains a number of traversals from the mailing list that do not easily fit any particular pattern (i.e. a recipe), +but are nonetheless interesting and thus remain good tools for learning Gremlin. + +[[appendix-a]] +_For each person in a "follows" graph, determine the number of followers and list their names._ + +[gremlin-groovy] +---- +g.addV('name','marko').as('marko'). + addV('name','josh').as('josh'). + addV('name','daniel').as('daniel'). + addV('name','matthias').as('matthias'). + addE('follows').from('josh').to('marko'). + addE('follows').from('matthias').to('josh'). + addE('follows').from('daniel').to('josh'). + addE('follows').from('daniel').to('marko').iterate() +g.V().as('p'). + map(__.in('follows').values('name').fold()). + group().by(select('p').by('name')). + by(project('numFollowers','followers'). + by(count(local)).by()).next() +---- + +[[appendix-b]] +_In the "modern" graph, show each person, the software they worked on and the co-worker count for the software and +the names of those co-workers._ + +[gremlin-groovy,modern] +---- +g.V().hasLabel("person").as("p"). + out("created").as("s"). + map(__.in("created"). + where(neq("p")).values("name").fold()). + group().by(select("p").by("name")). + by(group().by(select("s").by("name")). + by(project("numCoworkers","coworkers"). + by(count(local)).by())).next() +---- + +[[appendix-c]] +_Assuming a graph of students, classes and times, detect students who have a conflicting schedule._ + +[gremlin-groovy] +---- +g.addV(label, "student", "name", "Pete").as("s1"). + addV(label, "student", "name", "Joe").as("s2"). + addV(label, "class", "name", "Java's GC").as("c1"). + addV(label, "class", "name", "FP Principles").as("c2"). + addV(label, "class", "name", "Memory Management in C").as("c3"). + addV(label, "class", "name", "Memory Management in C++").as("c4"). + addV(label, "timeslot", "date", "11/25/2016", "fromTime", "10:00", "toTime", "11:00").as("t1"). + addV(label, "timeslot", "date", "11/25/2016", "fromTime", "11:00", "toTime", "12:00").as("t2"). + addE("attends").from("s1").to("c1"). + addE("attends").from("s1").to("c2"). + addE("attends").from("s1").to("c3"). + addE("attends").from("s1").to("c4"). + addE("attends").from("s2").to("c2"). + addE("attends").from("s2").to("c3"). + addE("allocated").from("c1").to("t1"). + addE("allocated").from("c1").to("t2"). + addE("allocated").from("c2").to("t1"). + addE("allocated").from("c3").to("t2"). + addE("allocated").from("c4").to("t2").iterate() +g.V().hasLabel("student").as("s"). + out("attends").as("c"). + out("allocated").as("t"). + select("s"). + out("attends"). + where(neq("c")). + out("allocated"). + where(eq("t")). + group(). + by(select("s").by("name")). + by(group().by(select("t").by(valueMap("fromTime","toTime"))). + by(select("c").dedup().values("name").fold())).next() +---- \ No newline at end of file
