Flattener

flattener.rb

# https://stackoverflow.com/a/35963024

module Flattener
  def deep_flatten
    flatten.map do |item|
      case item
      when Hash, Array
        item.deep_flatten
      else
        item
      end
    end.flatten
  end
end

class Hash
  include Flattener
end

class Array
  include Flattener
end