temp_calculator.rb

require 'open-uri'
require 'json'

class Temprature

  DROPBOX_FILE_URL = 'https://www.dropbox.com/s/zih6f1psx82ehe1/miami-temperature.txt?dl=1' 
 
  def initialize
    get_data_from_dropbox_file
  end	

  def least_difference_day
    min_element = @data.min 
    @data.index(min_element) + 1
  end
 	
  def max_difference_day
    max_element = @data.max
    @data.index(max_element) + 1
  end	

  private

  def get_data_from_dropbox_file
    parse_response(URI.parse(DROPBOX_FILE_URL).read) 
  end

  def parse_response(data)
    lines = data.split("\n")
    @data = []
    
    lines.each do |line|
      if line != ''
        columns = line.split(" ")[0..2].map {|x| x.to_i} 
        @data << columns[1] - columns[2] if columns[0].to_i.between?(1,31) 
      end
    end
  end

end

temp = Temprature.new
print temp.max_difference_day.to_s + " " + temp.least_difference_day.to_s