gistfile1.rb

    postcodes = FasterCSV.read(data_source_for("postcodes.csv"))
    postcodes.each do |(post_code, name, state_name, _, _, _, _, _, _, category)|
      if category.squish == "Delivery Area"
        post_code = sprintf("%04d", post_code.to_i)
        state = State.find_or_create_by_name(state_name)
        Locality.create(:post_code => post_code, :name => name, :state => state)
      end
    end