Loading stuff into neo via the batch API

neo_loading.rb

# So the problem is inserting data into neo using the batch API. So we have a bunch of people and we want to put them into the graph and also
# add to to the index so that we can search for them. 
# The way the batch API works is that you can refer to previous commands by referencing their index in the list of commands (zero indexed)
# e.g. if I want to reference the person added in the first command I would reference that node as {0} 
# You should be able to see how that works in the code below.  

neo_people_to_load =
  [{ :name => "Mark Needham", :id => 1 },
   { :name => "Jenn Smith",   :id => 2 },
   { :name => "Chris Ford",   :id => 3 }]

insert_commands = neo_people_to_load.map do |person|
  [:create_node, {:id => person[:id], :name => person[:name]}]
end

index_commands = neo_people_to_load.each_with_index.map do |person, index|
  [:add_node_to_index, "people", "name", person[:name], "{#{index}}"]
end

people_commands = insert_commands + index_commands

# So what we want to get is the following:
# [
#  [:create_node, {:id=>"1", :name=>"Mark Needham"}], [:add_node_to_index, "people", "name", "Mark Needham", "{0}"], 
#  [:create_node, {:id=>"2", :name=>"Jenn Smith"}], [:add_node_to_index, "people", "name", "Jenn Smith", "{2}"], 
#  [:create_node, {:id=>"3", :name=>"Chris Ford"}, [:add_node_to_index, "people", "name", "Chris Ford", "{4}"]
# ]

You could change the last line to be:

people_commands = insert_commands + index_commands

But otherwise it's cool. I like the idea of splitting up the concerns. I guess the functional way encourages you to do that whereas imperative you tend to do it all in one go.

Yep, + is nicer.

I think the functional style does encourage separation, because output is a value and not a side effect, so you can interleave etc later.