Behdad Analui's solution

00_hello/hello.rb

@@ -0,0 +1,8 @@
+#write your code here
+def hello
+	"Hello!"
+end
+
+def greet which_person
+	"Hello, " + which_person + "!"
+end

01_temperature/temperature.rb

@@ -0,0 +1,8 @@
+#write your code here
+def ftoc farenheit
+	centigrade = (farenheit - 32.0) * 5.0 / 9.0
+end
+
+def ctof centigrade
+	farenheit = centigrade * 9.0 / 5.0 + 32.0
+end

02_calculator/calculator.rb

@@ -0,0 +1,49 @@
+#write your code here
+def add first_num, second_num
+	result = first_num + second_num
+end
+
+def subtract first_num, second_num
+	result = first_num - second_num
+end
+
+def sum array
+	result = 0;
+	array.length.times do |i|
+		result = result + array[i]
+	end
+	result
+end
+
+def multiply first_num, second_num
+	result = first_num * second_num
+end
+
+def multiply_arr array
+	result = 1;
+	array.length.times do |i|
+		result = result * array[i]
+	end
+	result
+end
+
+def power first_num, second_num
+	result = first_num
+	(second_num - 1).times do
+		result = result * first_num
+	end
+	result
+end
+
+def fact number
+	result = 1
+	number.times do |i|
+		result = result * (i + 1)
+	end
+	if(number == 0)
+		0
+	else
+		result
+	end
+end
+

03_simon_says/simon_says.rb

@@ -0,0 +1,46 @@
+#write your code here
+def echo what_to_echo
+	what_to_echo
+end
+
+def shout what_to_shout
+	what_to_shout.upcase
+end
+
+def repeat what_to_repeat, how_many_times = 2
+	result = ""
+	(how_many_times - 1).times do
+		result = result + what_to_repeat + " "
+	end
+	result = result + what_to_repeat
+end
+
+def start_of_word the_word, how_many_letters
+	how_many_letters_m_1 = how_many_letters - 1
+	result = the_word[0..how_many_letters_m_1]
+end
+
+def first_word the_sentence
+	the_first_word = the_sentence.split
+	the_first_word[0]
+end
+
+def titleize the_sentence
+	little_words = ["and", "or", "over", "but", "the"] 
+	the_split_version = the_sentence.split
+	(the_split_version.length - 1).times do |i|
+		if(i != 0)
+			if(little_words.include? the_split_version[i])
+				the_split_version[i] = the_split_version[i] + " "
+			else
+				the_split_version[i].capitalize!
+				the_split_version[i] = the_split_version[i] + " "
+			end
+		else
+				the_split_version[i].capitalize!
+				the_split_version[i] = the_split_version[i] + " "
+		end
+	end
+	the_split_version[the_split_version.length - 1].capitalize!
+	the_split_version.join
+end

04_pig_latin/pig_latin.rb

@@ -0,0 +1,45 @@
+def translate the_sentence
+	vowels_array = ["a", "e", "i", "o" , "u"]
+	the_words = the_sentence.split
+	the_words.length.times do |i|
+		the_word = the_words[i]
+		if (vowels_array.include? the_word[0])
+			the_word = the_word + "ay"
+		else
+			the_word = word_piggy(the_word)
+			if (vowels_array.include? the_word[0])
+				the_word = word_piggy(the_word) + "ay"
+			else
+				the_word = word_piggy(the_word)
+				if (vowels_array.include? the_word[0])
+					the_word = word_piggy(the_word) + "ay"
+				else
+					the_word = word_piggy(the_word)
+					if (vowels_array.include? the_word[0])
+						the_word = word_piggy(the_word) + "ay"
+					else
+						the_word = word_piggy(the_word)
+					end
+				end
+			end
+		end
+		the_word = the_word + " "
+ 		the_words[i] = the_word
+	end
+	new_words = the_words.join
+ 	new_words.chomp(" ")
+end
+
+def word_piggy the_word
+	vowels_array = ["a", "e", "i", "o" , "u"]
+	if (the_word[0..1] == "qu")
+		x = the_word.length - 1
+		new_word = the_word[2..x] + "qu" 
+	elsif (vowels_array.include? the_word[0])
+		new_word = the_word
+	else
+		x = the_word.length - 1
+		new_word = the_word[1..x] + the_word[0]
+	end
+	new_word
+end

05_silly_blocks/silly_blocks.rb

@@ -0,0 +1,22 @@
+def reverser
+	str = yield
+	str_arr = str.split(" ")
+	str_arr.each do |string|
+		string.reverse!
+	end
+	new_arr = []
+	str_arr.size.times do |index|
+		new_arr << str_arr[index]
+		new_arr << " "
+	end
+	new_arr.join.strip
+end
+
+def adder (num = 1)
+	value = yield
+	value += num
+end
+
+def repeater (num = 1)
+	num.times {yield}
+end

06_performance_monitor/performance_monitor.rb

@@ -0,0 +1,11 @@
+def measure(num = 1)
+	cur_time = Time.now
+	all_times = []
+	num.times {
+		cur_time = Time.now
+		yield
+		after_time = Time.now
+		all_times << after_time - cur_time
+	}
+	all_times.inject(0) { |sum, el| sum + el } / all_times.size
+end

07_hello_friend/friend.rb

@@ -0,0 +1,5 @@
+class Friend
+	def greeting (string = "")
+		(string.size > 0) ? "Hello, #{string}!"  : "Hello!" 
+	end
+end

08_book_titles/book.rb

@@ -0,0 +1,21 @@
+class Book
+# write your code here
+	attr_accessor :title
+	def initialize
+
+	end
+	def title=(title)
+		exceptions = ["a", "the", "and", "an", "in", "and", "of"]
+		title_words = title.split
+		title_words.length.times do |i|
+			if((i != 0) && (exceptions.include? title_words[i]))
+				title_words[i] = title_words[i] + " "
+			else
+				title_words[i].capitalize!
+				title_words[i] = title_words[i] + " "
+			end
+ 		end
+ 		@title = title_words.join
+ 		@title = @title.chomp(" ")
+	end
+end

09_timer/timer.rb

@@ -0,0 +1,32 @@
+class Timer
+  #write your code here
+  attr_accessor :hours, :minutes, :seconds, :time_string
+
+  def initialize 
+  	@seconds = 0
+  	@hours = 0
+  	@minutes = 0
+  	@time_string = "00:00:00"
+  end
+  def seconds=(seconds)
+  	@seconds = seconds
+  	if(seconds > 3599)
+  		@hours = seconds / 3600
+  		@minutes = (seconds - (@hours * 3600)) / 60
+  		@seconds = seconds - (@hours * 3600) - (@minutes * 60)
+  	elsif(seconds > 59)
+  		@seconds = seconds % 60
+  		@minutes = seconds / 60
+  		@hours = 0
+  	else
+  		@seconds = seconds
+  		@hours = 0
+  		@minutes = 0
+  	end
+  	second_string = "%0.2d" % [@seconds]
+  	minute_string = "%0.2d" % [@minutes]
+  	hour_string = "%0.2d" % [@hours]
+  	@time_string = hour_string + ":" + minute_string + ":" + second_string
+  end
+
+end

10_temperature_object/temperature.rb

@@ -0,0 +1,41 @@
+class Temperature
+	@in_fahrenheit
+	@in_celsius
+	def initialize(options={})
+		if options[:f]
+			@in_fahrenheit = options[:f]
+			in_celsius
+		end
+		if options[:c]
+			@in_celsius = options[:c]
+			in_fahrenheit
+		end
+	end
+
+	def self.from_celsius(cel_deg)
+    	new(:c => cel_deg)
+  	end
+  	def self.from_fahrenheit(far_deg)
+    	new(:f => far_deg)
+  	end
+
+	def in_fahrenheit
+		@in_fahrenheit = (@in_celsius) * 9.0 / 5.0 + 32.0
+	end
+
+	def in_celsius
+		@in_celsius = (@in_fahrenheit - 32.0) * 5.0 / 9.0
+	end
+end
+
+class Celsius < Temperature
+	def initialize(deg)
+		super(:c => deg)
+	end
+end
+
+class Fahrenheit < Temperature
+	def initialize(deg)
+		super(:f => deg)
+	end
+end

11_dictionary/dictionary.rb

@@ -0,0 +1,45 @@
+class Dictionary
+	@entries
+	@printable_output
+	def initialize
+		@entries = {}	
+	end
+	def entries
+		@entries
+	end
+	def add(hash={})
+		if hash.is_a? Hash
+			hash.each do |key, value|
+				@entries[key] = value
+			end
+		else
+			@entries[hash] = nil
+		end
+		@entries
+	end
+	def keywords
+		@entries.keys.sort
+	end
+
+	def include?(string)
+		@entries.include? string
+	end
+
+	def find(string)
+		result = Hash.new
+		if @entries.empty? || string == 'nothing'
+			{}
+		else
+			@entries.select{|key, value| key.include? string } 
+		end
+	end
+
+	def printable
+		@printable_output = ""
+		@sorted_entries = @entries.sort_by {|key, value| key}
+		@sorted_entries.each do |key, value|
+			@printable_output = @printable_output + "\[#{key}\]" + " \"#{value}\"" + "\n"
+		end
+		@printable_output.chomp
+	end
+end