# File lib/ai4r/clusterers/single_linkage.rb, line 183
      def distance_between_item_and_cluster(data_item, cluster)
        min_dist = 1.0/0
        cluster.data_items.each do |another_item|
          dist = @distance_function.call(data_item, another_item)
          min_dist = dist if dist < min_dist
        end
        return min_dist
      end