def to_s
      #check whether any `high` bits are set
      ret           = (65..128).find {|bit| !!self[bit]}
      high, @bmp[0] = ret ? [128, true] : [64, false]

      str = ""
      1.upto(high) do|i|
        str << (self[i] ? '1' : '0')
      end

      str
    end
def to_s
      #check whether any `high` bits are set
      ret           = (65..128).find {|bit| !!self[bit]}
      high, @bmp[0] = ret ? [128, true] : [64, false]

      str = ""
      1.upto(high) do|i|
        str << (self[i] ? '1' : '0')
      end

      str
    end
Generate a String representation of this bitmap in the form:
	01001100110000011010110110010100100110011000001101011011001010