extract_method.rb

# NOTE: line 7 fixes bug in original version
class TimeSetter
  def self.convert(d)
    y = 1980
    while (d > 365) do
      if leap_year?(y)
        if (d >= 366)
          d -= 366
          y += 1
        end
      else
        d -= 365
        y += 1
      end
    end
    return y
  end
  private
  def self.leap_year?(year)
    year % 400 == 0 ||
      (year % 4 == 0 && year % 100 != 0)
  end
end