activity_4.py

def ascending_order(my_list):
    length_list = len(my_list) - 1
    sorted = False
    while not sorted:
        sorted = True
        for i in range(length_list):
            if my_list[i][1] > my_list[i+1][1]:
                sorted = False
                my_list[i], my_list[i+1] = my_list[i+1], my_list[i]
    return my_list

list_of_music = [('title1',2),('title2',3),('title5',0),('title3',2),('title4',1)]
#def playlist(list_of_music):
#	print list_of_music[0][1]

#sorted_music_list = ascending_order(list_of_music)


def create_playlist(my_playlist, max_time):
	sorted_play_list = ascending_order(my_playlist)
	#print sorted_play_list
	our_play_list = []
	time_out = 0
	i = 0
	while time_out < max_time:
		our_play_list.append(sorted_play_list[i])
		time_out = time_out + sorted_play_list[i][1]
		i+=1
	return our_play_list


print(create_playlist(list_of_music,5))

activity_4_2.rb

def bring_out_matrix_val(matrix, val)
	# a = [[1,2,3,4],[5,6,7,8],[9,11,12,13],[14,15,16,17]]
	(0..matrix.length - 1).each do |v|
		if matrix[v].last >= val
			#puts "we are here"
			matrix[v].each do |i|
				if i == val
					first = v
					second = matrix[v].index(i)
					return "["+first.to_s+","+second.to_s+"]"
				end

			end
			break
		end
	end
end
a = [[1,2,3,4],[5,6,7,8],[9,11,12,13],[14,15,16,17]]
puts bring_out_matrix_val(a,11)

activity_4_3.rb

def compress_file(filename)
	cmp_text = ""
	File.open(filename).each do |line|
		line.gsub! 'the', 'e'
		line.gsub! 'down', 'dwn'
		line.gsub! 'going', 'goin'
		line.gsub! 'could', 'cud'
		line.gsub! 'come', 'cme'
		line.gsub! 'just', 'jus'
		line.gsub! 'before', 'b4'
		line.gsub! 'long', 'lng'
		line.gsub! 'become', 'bcme'
		line.gsub! 'answer', 'ans'
		line.gsub! 'you', 'u'
		line.gsub! 'are', 're'
		line.gsub! 'have', 've'
		line.gsub! 'but', 'bt'
		line.gsub! 'has', 'hs'
		cmp_text = cmp_text + line
	end
	File.open('passage.txt.cdn', 'w') { |file| file.write(cmp_text) }
end


def de_press_file(filename)
	cmp_text = ""
	File.open(filename).each do |line|
		line.gsub! 'e', 'the'
		line.gsub! 'dwn', 'down'
		line.gsub! 'goin', 'going'
		line.gsub! 'cud', 'could'
		line.gsub! 'come', 'come'
		line.gsub! 'jus', 'just'
		line.gsub! 'b4', 'before'
		line.gsub! 'long', 'long'
		line.gsub! 'bcme', 'become'
		line.gsub! 'ans', 'answer'
		line.gsub! 'u', 'you'
		line.gsub! 're', 'are'
		line.gsub! 've', 'have'
		line.gsub! 'bt', 'but'
		line.gsub! 'hs', 'has'
		cmp_text = cmp_text + line
	end
	File.open('passage.txt', 'w') { |file| file.write(cmp_text) }
end

de_press_file("passage.txt.cdn")