adding another example

examples/traversal_example2.rb

@@ -0,0 +1,54 @@
+require 'rubygems'
+require 'neography'
+
+@neo = Neography::Rest.new
+
+def create_node(name, mysql_id)
+  @neo.create_node("name" => name, "mysql_id" => mysql_id)
+end
+
+def attended(student, school, degree, graduated)
+  @neo.create_relationship("attended", student, school, {"degree" => degree, "graduated" => graduated})
+end
+
+
+def graduated_with_me(student)
+  student = student["self"].split('/').last
+  student_attended = @neo.get_node_relationships(student)[0]
+  graduated = student_attended["data"]["graduated"]
+  school = student_attended["end"].split('/').last
+
+  @neo.traverse(school,"nodes", {"order" => "breadth first", 
+                                          "uniqueness" => "node global", 
+                                          "relationships" => {"type"=> "attended", "direction" => "in"}, 
+                                          "return filter" => {
+                                            "language" => "javascript",
+                                            "body" => "position.length() == 1  
+                                                       && position.endNode().getId() != #{student} 
+                                                       && position.lastRelationship().getProperty(\"graduated\") == #{graduated};"}})
+end
+
+charlie = create_node("Charlie", 1)
+max     = create_node("Max",     2)
+peter   = create_node("Peter",   3)
+carol   = create_node("Carol",   3)
+tom     = create_node("Tom",     4)
+jerry   = create_node("Jerry",   5)
+larry   = create_node("Larry",   6)
+
+yale    = create_node("Yale",    7)
+harvard = create_node("Harvard", 8)
+rutgers = create_node("Rutgers", 9)
+
+attended(charlie,yale,"engineering", 2010)
+attended(max,yale,"mathematics", 2005)
+attended(peter,yale,"biology", 2010)
+attended(carol,yale,"engineering", 2010)
+attended(tom,harvard,"biology", 2008)
+attended(jerry,rutgers,"physics", 2007)
+attended(larry,rutgers,"mathematics", 2010)
+
+
+puts "Charlie graduated with #{graduated_with_me(charlie).map{|n| n["data"]["name"]}.join(', ')}"
+
+# The node levels returned are Peter, Carol