number_to_human_size (ActionView::Helpers::NumberHelper)

    # File lib/action_view/helpers/number_helper.rb, line 87
          def number_to_human_size(size)
            case
              when size < 1.kilobyte: '%d Bytes' % size
              when size < 1.megabyte: '%.1f KB'  % (size / 1.0.kilobyte)
              when size < 1.gigabyte: '%.1f MB'  % (size / 1.0.megabyte)
              when size < 1.terabyte: '%.1f GB'  % (size / 1.0.gigabyte)
              else                    '%.1f TB'  % (size / 1.0.terabyte)
            end.sub('.0', '')
          rescue
            nil
          end