michaelmior / NoSE

      def initialize(params = {})

        super params

        @beta = params.fetch :beta, 0.5

        @node_degree = params.fetch :node_degree, 2

        @nodes = 0..(@nodes_nb - 1)

        @entities = @nodes.map do |node|

          create_entity node

        end

        build_initial_links

        rewire_links

        add_foreign_keys

      end

      private

      # Set up the initial links between all nodes

      # @return [void]

      def build_initial_links

        @nodes.each do |node|

          (@node_degree / 2).times do |i|

            add_link node, (node + i + 1) % @nodes_nb

          end

        end

      end

      # Rewire all links between nodes

      # @return [void]

      def rewire_links

        (@node_degree / 2).times do |i|

          @nodes.each do |node|

            next unless rand < @beta

            neighbour = (node + i + 1) % @nodes_nb

            remove_link node, neighbour

            add_link node, new_neighbour(node, neighbour)

          end

        end

      end

    end