From d0ad2770a4cb80b46267ecf28f19ed41684e015b Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Wed, 7 Sep 2016 19:35:56 +0300
Subject: [PATCH 01/24] Chapter 9. excercise 1: ASK

---
 ch09-writing-your-own-methods/ask.rb | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/ch09-writing-your-own-methods/ask.rb b/ch09-writing-your-own-methods/ask.rb
index 01716eb35..cfacfd7a2 100644
--- a/ch09-writing-your-own-methods/ask.rb
+++ b/ch09-writing-your-own-methods/ask.rb
@@ -1,3 +1,13 @@
-def ask question
-  # your code here
+def ask question 
+
+	while true
+	  puts question
+	  reply = gets.chomp.downcase
+
+	  if (reply == 'yes' || reply == 'no')
+	  	return reply == 'yes'
+	  else
+			puts 'Please answer "yes" or "no".'  
+		end
+	end
 end
\ No newline at end of file

From f3ef8bfc6c537f2ad74101e2f2549e7089783d3d Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Wed, 7 Sep 2016 19:47:42 +0300
Subject: [PATCH 02/24] Chapter 9. Old school Romans

---
 .../old_school_roman_numerals.rb                 | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/ch09-writing-your-own-methods/old_school_roman_numerals.rb b/ch09-writing-your-own-methods/old_school_roman_numerals.rb
index ca6589f2d..0bd17ca2a 100644
--- a/ch09-writing-your-own-methods/old_school_roman_numerals.rb
+++ b/ch09-writing-your-own-methods/old_school_roman_numerals.rb
@@ -1,3 +1,17 @@
 def old_roman_numeral num
-  # your code here
+ 	romans    = ['I',  'V',  'X',  'L',   'C',   'D',    'M']
+  values    = [ 1,    5,   10,   50,   100,   500,   1000 ]
+  result    = ''
+  
+  values.select!{ |v| v <= num }
+  
+  (values.length-1).downto(0) { |i|
+    max_num = values[i]
+    (num / max_num).times { 
+      result += romans[i]
+      num -= max_num
+    }
+  }
+  
+  return result
 end
\ No newline at end of file

From 2f6d4849a949342be18248475d651738bba0491b Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Wed, 7 Sep 2016 23:24:43 +0300
Subject: [PATCH 03/24] Chapter 9. Roman numbers. complex refactoring :)

---
 .../roman_numerals.rb                         | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/ch09-writing-your-own-methods/roman_numerals.rb b/ch09-writing-your-own-methods/roman_numerals.rb
index 5c93b59ac..09bbc0b38 100644
--- a/ch09-writing-your-own-methods/roman_numerals.rb
+++ b/ch09-writing-your-own-methods/roman_numerals.rb
@@ -1,3 +1,20 @@
 def roman_numeral num
-  # your code here
+	roman_letters = "IVXLCDM"
+  mods = {:C => 100, :X => 10, :I => 1}
+
+  roman = 'M' * (num / 1000)
+
+  mods.each do |k, v|
+  	digit = num % (10 * v) / v
+  	id = roman_letters.index(k.to_s)
+
+  	if (digit == 9) || (digit == 4)
+  		roman += k.to_s + (digit == 9 ? roman_letters[id+2] : roman_letters[id+1])
+  	else
+  		roman += roman_letters[id+1] * (num % (10 * v) / (5 * v))
+  		roman += roman_letters[id] * (num % (5 * v) / v)
+  	end
+  end
+
+	roman
 end
\ No newline at end of file

From 7008ee3021b47e1a9c3a4190e72bd4df1b3fe648 Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Thu, 8 Sep 2016 11:19:03 +0300
Subject: [PATCH 04/24] Chapter 10. Shuffle method

---
 ch10-nothing-new/shuffle.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ch10-nothing-new/shuffle.rb b/ch10-nothing-new/shuffle.rb
index a486ad94c..212539eae 100644
--- a/ch10-nothing-new/shuffle.rb
+++ b/ch10-nothing-new/shuffle.rb
@@ -1,3 +1,5 @@
 def shuffle arr
-  # your code here
+  arr.shuffle!
+  half = arr.length / 2
+  arr = arr.slice(0, half).shuffle + arr.slice(half, arr.length).shuffle
 end
\ No newline at end of file

From a87d1c747a74dafd1d4c098aa62a158f1d5ad291 Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Thu, 8 Sep 2016 11:27:14 +0300
Subject: [PATCH 05/24] Chapter 10. Dictionary sort

---
 ch10-nothing-new/dictionary_sort.rb | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/ch10-nothing-new/dictionary_sort.rb b/ch10-nothing-new/dictionary_sort.rb
index c9893d0fd..a5fa81fbd 100644
--- a/ch10-nothing-new/dictionary_sort.rb
+++ b/ch10-nothing-new/dictionary_sort.rb
@@ -1,3 +1,22 @@
 def dictionary_sort arr
-  # your code here
+  recursive_sort arr, []
+end
+
+def recursive_sort unsorted_array, sorted_array
+  smallest_id = 0
+  
+  (unsorted_array.length-1).times { |i|
+    if unsorted_array[smallest_id].downcase > unsorted_array[i+1].downcase
+      smallest_id = i+1
+    end
+  }
+  
+  sorted_array.push(unsorted_array[smallest_id])
+  unsorted_array.delete_at(smallest_id)
+  
+  if unsorted_array.length > 0
+    recursive_sort unsorted_array, sorted_array
+  else
+    return sorted_array
+  end
 end
\ No newline at end of file

From b969da9ea816dc55ab00cb0f5cb40692635cec88 Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Thu, 8 Sep 2016 13:33:42 +0300
Subject: [PATCH 06/24] Chapter 10. quindecillion...

---
 ch10-nothing-new/english_number.rb | 69 +++++++++++++++++++++++++++++-
 1 file changed, 67 insertions(+), 2 deletions(-)

diff --git a/ch10-nothing-new/english_number.rb b/ch10-nothing-new/english_number.rb
index c0129bc4e..a1b9eeeb0 100644
--- a/ch10-nothing-new/english_number.rb
+++ b/ch10-nothing-new/english_number.rb
@@ -1,3 +1,68 @@
 def english_number number
-  # your code here
-end
+	if number < 0
+		return 'Please enter a number that isn\'t negative.' 
+	elsif number == 0 
+		return 'zero'
+	end
+	
+	num_string = ''
+  
+  ones_place = ['one',       'two',      'three',
+                'four',      'five',     'six',
+                'seven',     'eight',    'nine']
+  tens_place = ['ten',       'twenty',   'thirty',
+                'forty',     'fifty',    'sixty',
+                'seventy',   'eighty',   'ninety']
+  teenagers  = ['eleven',    'twelve',   'thirteen',
+                'fourteen',  'fifteen',  'sixteen',
+								'seventeen', 'eighteen', 'nineteen']
+
+	big_numbers = { :quindecillion => 10**48,			:quattuordecillion => 10**45, :tredecillion => 10**42,	
+									:duodecillion => 10**39,			:undecillion => 10**36, 			:decillion => 10**33,			
+									:nonillion => 10**30,					:octillion => 10**27,					:septillion => 10**24,
+									:sextillion => 10**21,				:quintillion => 10**18,				:quadrillion => 10**15,		
+									:trillion => 10**12,					:billion => 10**9,						:million => 1_000_000,
+									:thousand => 1000,		 				:hundred => 100																			}
+
+	left = number
+
+	big_numbers.each do |word, num|
+		write = left / num
+		left = left - write * num
+
+		if write > 0
+			numbers = english_number write
+			num_string = num_string + numbers + " #{word}" 
+
+			if left > 0
+		    num_string = num_string + ' '
+			end
+		end
+	end
+
+	write = left / 10 				# How many tens left?
+	left = left - write * 10	# Subtract off those tens.
+
+	if write > 0
+		if ((write == 1) and (left > 0))
+      #  Since we can't write "tenty-two" instead of "twelve"
+      num_string = num_string + teenagers[left-1]
+			left = 0
+		else
+      num_string = num_string + tens_place[write-1]
+    end
+
+		if left > 0
+			num_string = num_string + '-' # So we don't write 'sixtyfour'... 
+		end 
+	end
+
+	write = left # How many ones left to write out? 
+	left = 0 # Subtract off those ones.
+
+	if write > 0
+		num_string = num_string + ones_place[write-1]
+	end
+
+	num_string
+end
\ No newline at end of file

From 0071f24fcca7a660230aff9d7fa2bd63998c61d6 Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Thu, 8 Sep 2016 19:01:41 +0300
Subject: [PATCH 07/24] Chapter 10. 99 bottles of beer...

---
 ch10-nothing-new/ninety_nine_bottles_of_beer.rb | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/ch10-nothing-new/ninety_nine_bottles_of_beer.rb b/ch10-nothing-new/ninety_nine_bottles_of_beer.rb
index 801de24bd..8e73fc611 100644
--- a/ch10-nothing-new/ninety_nine_bottles_of_beer.rb
+++ b/ch10-nothing-new/ninety_nine_bottles_of_beer.rb
@@ -1 +1,11 @@
-# your code here
\ No newline at end of file
+load 'english_number.rb'
+
+num_at_start = 21 # change to 9999 if you want
+
+num_at_start.downto(1) do |num_now|
+  puts english_number(num_now).capitalize + " bottle#{num_now==1 ? '' : 's'} of beer on the wall, " +
+    english_number(num_now) + " bottle#{num_now==1 ? '' : 's'} of beer!"
+	
+  puts "Take one down, pass it around, " +
+     (num_now == 1 ? 'no more' : english_number(num_now-1)) + " bottle#{num_now == 2 ? '' : 's'} of beer on the wall!"
+end
\ No newline at end of file

From ad957b151aadb07e6c9123a837f9a660d5fa08fb Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Thu, 8 Sep 2016 19:35:10 +0300
Subject: [PATCH 08/24] Chapter 10. recursive sort

---
 ch10-nothing-new/sort.rb | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/ch10-nothing-new/sort.rb b/ch10-nothing-new/sort.rb
index 44c6deb58..de50ce765 100644
--- a/ch10-nothing-new/sort.rb
+++ b/ch10-nothing-new/sort.rb
@@ -1,3 +1,19 @@
 def sort arr
-  # your code here
+  recursive_sort arr, []
+end
+
+def recursive_sort unsorted_array, sorted_array
+  smallest_id = 0
+  
+  (unsorted_array.length-1).times { |i|
+    smallest_id = i+1 if unsorted_array[smallest_id] > unsorted_array[i+1]
+  }
+  
+  sorted_array.push(unsorted_array.delete_at(smallest_id))
+    
+  if unsorted_array.length > 0
+    recursive_sort unsorted_array, sorted_array
+  else
+    return sorted_array
+  end
 end
\ No newline at end of file

From 5ac3e3251d6e39797408cd6258f94e840efb3f07 Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Fri, 9 Sep 2016 11:16:17 +0300
Subject: [PATCH 09/24] Chapter 11. safer picture downloading

---
 .../safer_picture_downloading.rb              | 39 ++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/ch11-reading-and-writing/safer_picture_downloading.rb b/ch11-reading-and-writing/safer_picture_downloading.rb
index 801de24bd..287e76b0f 100644
--- a/ch11-reading-and-writing/safer_picture_downloading.rb
+++ b/ch11-reading-and-writing/safer_picture_downloading.rb
@@ -1 +1,38 @@
-# your code here
\ No newline at end of file
+#  This program safely copies all .jpg from current directory to a chosen image_path
+image_path = './PictureInbox'
+if Dir[image_path].empty?
+	Dir.mkdir(image_path)
+end
+Dir.chdir(image_path)
+
+#  First we find all of the pictures to be moved.
+pic_names = Dir['../*.jpg']
+
+puts 'What would you like to call this batch?'
+batch_name = gets.chomp
+
+puts
+print "Downloading #{pic_names.length} files:  "
+
+pic_number = 1
+pic_names.each do |name|
+	print '.' # This is our "progress bar".
+	new_name = if pic_number < 10 
+		"#{batch_name}0#{pic_number}.jpg"
+	else
+		"#{batch_name}#{pic_number}.jpg" 
+	end
+
+
+	if !File.exist?(new_name) 
+		File.rename name, new_name
+		pic_number = pic_number + 1
+	else
+		puts "\n\n"
+		puts "ERROR! File '#{new_name}' already exists in #{Dir.pwd}"
+		exit
+	end
+end
+
+puts 
+puts 'Done!'
\ No newline at end of file

From 2f852a8627c5c17b10eb5d91b6030110bbb1ecac Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Fri, 9 Sep 2016 13:20:01 +0300
Subject: [PATCH 10/24] Chapter 11. Build my own playlist

---
 .../build_your_own_playlist.rb                | 40 ++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/ch11-reading-and-writing/build_your_own_playlist.rb b/ch11-reading-and-writing/build_your_own_playlist.rb
index 801de24bd..68b3f9eb0 100644
--- a/ch11-reading-and-writing/build_your_own_playlist.rb
+++ b/ch11-reading-and-writing/build_your_own_playlist.rb
@@ -1 +1,39 @@
-# your code here
\ No newline at end of file
+#  This program finds all music files (.mp3, .wav, .aif) 
+#  in your chosen directory - 'MUSIC_PATH',
+#  and makes a .m3u playlist from it.
+#  Tracks are sorted alphabetically
+
+MUSIC_PATH = '/Users/tadasmajeris/Downloads/nu house : techno'
+
+if Dir[MUSIC_PATH].empty?
+	puts "ERROR! Directory '#{MUSIC_PATH}' not found!"
+	exit
+end
+Dir.chdir(MUSIC_PATH)
+
+#  First we find all of the pictures to be moved.
+file_names = Dir['./*.{mp3,wav,aif}']
+
+if file_names.length == 0
+	puts "ERROR! Directory '#{MUSIC_PATH}' is empty!"
+	exit
+end
+file_names.sort! # sort alphabetically, as it first finds .mp3, then .wav
+
+puts 'What would you like to call this playlist?'
+playlist_name = ''
+until playlist_name != ''
+	playlist_name = gets.chomp.strip
+	puts 'Please, enter a name' if playlist_name == ''
+end
+playlist_name += '.m3u'
+
+playlist_text = ""
+file_names.each { |name| playlist_text << name + "\n" }
+
+File.open playlist_name, 'w' do |f|
+    f.write playlist_text
+end
+
+puts 
+puts 'Done!'
\ No newline at end of file

From ce0971c8d44a763975ae0d0bcc1e14f14a0b9076 Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Fri, 9 Sep 2016 15:20:04 +0300
Subject: [PATCH 11/24] Chapter 11. FIX: build your own playlist now searches
 the subdirectories too

---
 ch11-reading-and-writing/build_your_own_playlist.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ch11-reading-and-writing/build_your_own_playlist.rb b/ch11-reading-and-writing/build_your_own_playlist.rb
index 68b3f9eb0..45cafc622 100644
--- a/ch11-reading-and-writing/build_your_own_playlist.rb
+++ b/ch11-reading-and-writing/build_your_own_playlist.rb
@@ -3,7 +3,7 @@
 #  and makes a .m3u playlist from it.
 #  Tracks are sorted alphabetically
 
-MUSIC_PATH = '/Users/tadasmajeris/Downloads/nu house : techno'
+MUSIC_PATH = '/Users/tadasmajeris/Downloads/nu electro'
 
 if Dir[MUSIC_PATH].empty?
 	puts "ERROR! Directory '#{MUSIC_PATH}' not found!"
@@ -12,7 +12,7 @@
 Dir.chdir(MUSIC_PATH)
 
 #  First we find all of the pictures to be moved.
-file_names = Dir['./*.{mp3,wav,aif}']
+file_names = Dir['./*/*.{mp3,wav,aif}']
 
 if file_names.length == 0
 	puts "ERROR! Directory '#{MUSIC_PATH}' is empty!"

From 5366fc837ad311f63acbc38fccc3249c32dc0bd6 Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Fri, 9 Sep 2016 20:23:44 +0300
Subject: [PATCH 12/24] Small typo from last fix

---
 ch11-reading-and-writing/build_your_own_playlist.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ch11-reading-and-writing/build_your_own_playlist.rb b/ch11-reading-and-writing/build_your_own_playlist.rb
index 45cafc622..bfbd649fd 100644
--- a/ch11-reading-and-writing/build_your_own_playlist.rb
+++ b/ch11-reading-and-writing/build_your_own_playlist.rb
@@ -11,8 +11,8 @@
 end
 Dir.chdir(MUSIC_PATH)
 
-#  First we find all of the pictures to be moved.
-file_names = Dir['./*/*.{mp3,wav,aif}']
+#  First we find all of the tracks to be moved.
+file_names = Dir['./**/*.{mp3,wav,aif}']
 
 if file_names.length == 0
 	puts "ERROR! Directory '#{MUSIC_PATH}' is empty!"

From 24e2a9431c7457d9bb16bb25c6919f199cab56cc Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Fri, 9 Sep 2016 20:26:00 +0300
Subject: [PATCH 13/24] Chapter 11. Build better playlist &&& much nicer to
 read code! Yours trully, Mr.OOP

---
 .../build_a_better_playlist.rb                | 93 ++++++++++++++++++-
 1 file changed, 92 insertions(+), 1 deletion(-)

diff --git a/ch11-reading-and-writing/build_a_better_playlist.rb b/ch11-reading-and-writing/build_a_better_playlist.rb
index 3b31bd241..363fe5c40 100644
--- a/ch11-reading-and-writing/build_a_better_playlist.rb
+++ b/ch11-reading-and-writing/build_a_better_playlist.rb
@@ -1,3 +1,94 @@
+#  This program finds all music files (.mp3, .wav, .aif) 
+#  in your chosen directory - 'MUSIC_PATH',
+#  and makes a SHUFFLED .m3u playlist.
+def shuffle arr
+  arr.shuffle!
+  half = arr.length / 2
+  arr = arr.slice(0, half).shuffle + arr.slice(half, arr.length).shuffle
+end
+
 def music_shuffle filenames
-  # your code here
+	filenames_arr = []
+	files_by_dir = {}
+
+	filenames.each do |name|
+		dir_name = name.split('/')[0...-1].join('/') #[0...-1] all but last element (/filename.xxx)
+
+		# create a hash, where key is directory name, and value is array of files in that dir..
+		files_by_dir[dir_name] ||= []
+		files_by_dir[dir_name] << name
+	end
+
+	# shuffle files in each directory
+	files_by_dir.each { |dir, arr| arr = shuffle(arr) }
+	
+	new_list = []
+	filenames.length.times do |i|
+		# take one item from each shuffled directory
+		files_by_dir.each do |dir, arr|
+			if !arr.empty?
+				# and add it to the new list // first or last item for more variety
+				new_list.push( (i%2==0) ? arr.shift : arr.pop )
+			else
+				files_by_dir[dir].clear
+			end
+		end
+	end
+
+	new_list
+end
+
+def get_playlist_name
+	puts 'What would you like to call this playlist?'
+	playlist_name = ''
+	until playlist_name != ''
+		playlist_name = gets.chomp.strip
+		puts 'Please, enter a name' if playlist_name == ''
+	end
+	playlist_name = playlist_name + '.m3u'
+end
+
+def get_file_names path
+	file_names = Dir['./**/*.{mp3,wav,aif,aiff,m4a}']
+
+	if file_names.length == 0
+		puts "ERROR! Directory '#{path}' is empty!"
+		exit
+	end
+	file_names.sort! # sort alphabetically, as it first adds .mp3, then .wav and so on..
+end
+
+def change_dir_to path
+	if Dir[path].empty?
+		puts "ERROR! Directory '#{path}' not found!"
+		exit
+	end
+	Dir.chdir(path)
+end
+
+def make_playlist(playlist_name, files)
+	playlist_text = ""
+	files.each { |name| playlist_text << name + "\n" }
+
+	File.open playlist_name, 'w' do |f|
+	    f.write playlist_text
+	end
+
+	puts 
+	puts 'Done!'
 end
+
+#--------------------------- PROGRAM ---------------------------#
+MUSIC_PATH = '/Users/tadasmajeris/Music/GROSIU/- deep : house -'
+
+# Find if given path exists, change working directory to it
+change_dir_to MUSIC_PATH
+
+# Find all of the tracks to be moved and shuffle them
+file_names = music_shuffle(get_file_names MUSIC_PATH)
+
+# Get user to enter the playlist name
+playlist_name = get_playlist_name
+
+# Make the playlist, save it to .m3u
+make_playlist(playlist_name, file_names)
\ No newline at end of file

From ba6fbbb2cc73edcde90dad0da4168173e14c60e0 Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Sat, 10 Sep 2016 16:00:56 +0200
Subject: [PATCH 14/24] Chapter 12. One billion seconds is soon..

---
 ch12-new-classes-of-objects/one_billion_seconds.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ch12-new-classes-of-objects/one_billion_seconds.rb b/ch12-new-classes-of-objects/one_billion_seconds.rb
index 801de24bd..ac8520db2 100644
--- a/ch12-new-classes-of-objects/one_billion_seconds.rb
+++ b/ch12-new-classes-of-objects/one_billion_seconds.rb
@@ -1 +1,2 @@
-# your code here
\ No newline at end of file
+bday = Time.gm(1986, 5, 21)
+puts Time.at(bday.to_i + 10**9)

From 9ac41882775706130652b70f2a7b18384b5a139f Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Sat, 10 Sep 2016 16:24:36 +0200
Subject: [PATCH 15/24] Chapter 12. Happy BDAY, SPANK

---
 ch12-new-classes-of-objects/happy_birthday.rb | 21 ++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/ch12-new-classes-of-objects/happy_birthday.rb b/ch12-new-classes-of-objects/happy_birthday.rb
index 801de24bd..aaeb1b8ac 100644
--- a/ch12-new-classes-of-objects/happy_birthday.rb
+++ b/ch12-new-classes-of-objects/happy_birthday.rb
@@ -1 +1,20 @@
-# your code here
\ No newline at end of file
+while true
+	puts "Enter your birthday in format: DD/MM/YYYY"
+	bday_arr = gets.chomp.strip.split('/')
+	day = bday_arr[0].to_i
+	mon = bday_arr[1].to_i
+	yea = bday_arr[2].to_i
+	if (1..31).include?(day) && (1..12).include?(mon) && (1900..Time.now.year).include?(yea)
+		bday = Time.gm(yea, mon, day)
+		break
+	else
+		puts "ERROR: Your entered date is wrong"
+	end
+end
+
+age = Time.now.year - bday.year
+age -= 1 if Time.now < bday + age
+
+puts "-" * 20
+puts "Your age is: #{age}"
+puts "SPANK! " * age
\ No newline at end of file

From ca714d224ce3ae9e5262f546901e05c16b80f14a Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Sun, 11 Sep 2016 20:03:59 +0100
Subject: [PATCH 16/24] Chapter 12. Party like its roman integerrr

---
 ...party_like_its_roman_to_integer_mcmxcix.rb | 20 ++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/ch12-new-classes-of-objects/party_like_its_roman_to_integer_mcmxcix.rb b/ch12-new-classes-of-objects/party_like_its_roman_to_integer_mcmxcix.rb
index 037b6cb09..b8dfa5b2e 100644
--- a/ch12-new-classes-of-objects/party_like_its_roman_to_integer_mcmxcix.rb
+++ b/ch12-new-classes-of-objects/party_like_its_roman_to_integer_mcmxcix.rb
@@ -1,3 +1,21 @@
 def roman_to_integer roman
-  # your code here
+	@romans = {	'I' => 1, 		
+							'V' => 5, 	
+							'X' => 10, 
+							'L' => 50,		
+							'C' => 100, 
+							'D' => 500, 
+							'M' => 1000 }
+
+	str = roman.upcase.reverse		# we will go backwards
+	last_value = @romans[str[0]]  # last digit's value
+	sum = last_value
+
+	(1..str.length-1).each do |i|	
+		next_value = @romans[str[i]]
+		sum += (next_value < last_value ? -1 : 1) * next_value # only two cases for -1, such as IV or IX..
+		last_value = next_value
+	end
+
+	sum
 end
\ No newline at end of file

From 27128c4a9632a165aaa92e619da681174b629419 Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Sun, 11 Sep 2016 21:19:06 +0100
Subject: [PATCH 17/24] Chapter 12. Birthday helper. John and Yoko...

---
 ch12-new-classes-of-objects/bdays.txt         |  4 ++
 .../birthday_helper.rb                        | 49 ++++++++++++++++++-
 2 files changed, 52 insertions(+), 1 deletion(-)
 create mode 100644 ch12-new-classes-of-objects/bdays.txt

diff --git a/ch12-new-classes-of-objects/bdays.txt b/ch12-new-classes-of-objects/bdays.txt
new file mode 100644
index 000000000..d5c1469db
--- /dev/null
+++ b/ch12-new-classes-of-objects/bdays.txt
@@ -0,0 +1,4 @@
+Alice Winters,	Jan	5,	1989
+Tadas Majeris,	May 21,	1986
+John Lennon,		Oct 9,	1940
+Yoko Ono,				Feb 18,	1933
diff --git a/ch12-new-classes-of-objects/birthday_helper.rb b/ch12-new-classes-of-objects/birthday_helper.rb
index 801de24bd..7c77c6eff 100644
--- a/ch12-new-classes-of-objects/birthday_helper.rb
+++ b/ch12-new-classes-of-objects/birthday_helper.rb
@@ -1 +1,48 @@
-# your code here
\ No newline at end of file
+#make a hash of bdays (name as key, date as value)
+#ask user to input a name
+#tell when next bday will be
+
+@filepath = "bdays.txt"
+
+def read_bdays
+  hash = {}
+  file = File.open(@filepath, 'r')
+  file.each_line do |line|
+  	# this regex finds first comma and optional spaces after, splits into 2
+  	name, date = line.chomp.split(/\,\W*/, 2)
+    date, year = date.split(/\,\W*/, 2)
+    month, day = date.split(/\W+/, 2)
+    hash[name] = [year, month, day]
+  end
+  return hash
+end
+
+## program ##
+if File.exist?(@filepath)
+  bdays = read_bdays
+  
+  print "Enter name: "
+  input = gets.chomp.strip.downcase
+  found = bdays.select do |name, v|
+    name.downcase.include?(input)
+  end
+  if found.empty? 
+    puts "-" * 40
+    puts "No results.\n\n"
+  else
+    puts "-" * 40
+    now = Time.now
+    
+    found.each do |k, v|
+      bday = Time.gm(v[0], v[1], v[2])
+      
+      #next year? - not (0), yes (1)
+      if_next_year = now.month < bday.month ? 0 : (now.month > bday.month) ? 1 : (now.day > bday.day ? 1 : 0)
+      next_bday = [now.year+if_next_year, bday.month, bday.day]
+      puts "#{k} next birthday:\t#{next_bday.join(', ')}.\tAge: #{next_bday[0]-bday.year}\n\n" 
+    end
+  end
+  
+else
+  puts "---> File '#{@filepath}' not found. Can't run the program.\n\n"
+end
\ No newline at end of file

From 5e6ce20a96cb96694d765eb4ecf809f84c7ed37d Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Sun, 11 Sep 2016 21:37:54 +0100
Subject: [PATCH 18/24] Chapter 13. Extended Integer class

---
 .../extend_built_in_classes.rb                | 25 ++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/ch13-creating-new-classes/extend_built_in_classes.rb b/ch13-creating-new-classes/extend_built_in_classes.rb
index c3e793933..1c941b788 100644
--- a/ch13-creating-new-classes/extend_built_in_classes.rb
+++ b/ch13-creating-new-classes/extend_built_in_classes.rb
@@ -1,3 +1,26 @@
 class Integer
-  # your code here
+
+ 	def to_roman
+ 		romans    = ['I',  'V',  'X',  'L',   'C',   'D',    'M']
+	  values    = [ 1,    5,   10,   50,   100,   500,   1000 ]
+	  result    = ''
+	  num = self
+
+	  values.select!{ |v| v <= num }
+	  
+	  (values.length-1).downto(0) { |i|
+	    max_num = values[i]
+	    (num / max_num).times { 
+	      result += romans[i]
+	      num -= max_num
+	    }
+	  }
+	  
+	  result
+ 	end
+
+ 	def factorial(num=self)
+ 		raise 'You can\'t take the factorial of a negative number!' if num < 0
+	  num <= 1 ? 1 : num * factorial(num-1)
+	end
 end
\ No newline at end of file

From 16691252819acd0d58e219ad4adf1d52df336dd3 Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Sun, 11 Sep 2016 22:38:26 +0100
Subject: [PATCH 19/24] Chapter 13. Interactive baby...

---
 .../interactive_baby_dragon.rb                | 159 +++++++++++++++++-
 1 file changed, 158 insertions(+), 1 deletion(-)

diff --git a/ch13-creating-new-classes/interactive_baby_dragon.rb b/ch13-creating-new-classes/interactive_baby_dragon.rb
index 801de24bd..5ddc68ce1 100644
--- a/ch13-creating-new-classes/interactive_baby_dragon.rb
+++ b/ch13-creating-new-classes/interactive_baby_dragon.rb
@@ -1 +1,158 @@
-# your code here
\ No newline at end of file
+class Dragon
+
+	def initialize name
+		@name = name
+		@asleep = false
+		@stuff_in_belly 		= 10	# He's full. 
+		@stuff_in_intestine = 0		# He doesn't need to go.
+		@actions = ['feed', 'walk', 'toss', 'sleep', 'rock', 'quit']
+
+		print_line
+		puts "#{@name} is born."		
+	end
+
+	def action_time!
+		display_actions
+		get_action
+	end
+
+	def print_line
+		puts "-" * 45
+	end
+
+	def feed
+		print_line
+		puts "You feed #{@name}." 
+		@stuff_in_belly = 10 
+		passage_of_time
+		action_time!
+	end
+
+	def walk
+		print_line
+		puts "You walk #{@name}." 
+		@stuff_in_intestine = 0
+		passage_of_time
+		action_time!
+	end
+
+	def sleep
+		print_line
+		puts "You put #{@name} to bed." 
+		@asleep = true
+		
+		3.times do
+			if @asleep 
+				passage_of_time
+			end
+			if @asleep
+		  	puts "#{@name} snores, filling the room with smoke."
+			end
+		end
+
+		if @asleep
+			@asleep = false
+			puts "#{@name} wakes up slowly."
+		end
+
+		action_time!
+	end
+
+	def toss
+		print_line
+		puts "You toss #{@name} up into the air."
+		puts 'He giggles, which singes your eyebrows.' 
+		passage_of_time
+		action_time!
+	end
+
+	def rock
+	  puts "You rock #{@name} gently."
+	  @asleep = true
+	  puts 'He briefly dozes off...'
+	  passage_of_time
+		if @asleep
+			@asleep = false
+			puts '...but wakes when you stop.'
+		end
+		action_time!
+	end
+
+	def quit
+		print_line
+		puts "Thanks for playing!"
+		exit
+	end
+
+	def display_actions
+		puts
+		puts "Actions: #{@actions.join(', ')}"
+	end
+
+	def get_action
+		while true
+			action = gets.chomp.strip.downcase
+			if @actions.include?(action)
+				dispatch(action)
+				break
+			else
+				display_actions
+			end
+		end
+	end
+
+	private
+
+	def dispatch action
+		puts
+		self.send(action)
+	end
+
+	def hungry?
+		@stuff_in_belly <= 2
+	end
+
+	def poopy? 
+		@stuff_in_intestine >= 8
+	end
+
+	def passage_of_time
+		if @stuff_in_belly > 0
+	    #  Move food from belly to intestine.
+	    @stuff_in_belly     = @stuff_in_belly     - 1
+	    @stuff_in_intestine = @stuff_in_intestine + 1
+		else # Our dragon is starving! if @asleep
+	    @asleep = false
+			puts 'He wakes up suddenly!' 
+		  puts "#{@name} is starving!  In desperation, he ate YOU!"
+			exit # This quits the program. 
+		end
+
+		if @stuff_in_intestine >= 10 
+			@stuff_in_intestine = 0
+			puts "Whoops! #{@name} had an accident..."
+		end
+
+		if hungry? 
+			if @asleep
+		  	@asleep = false
+				puts 'He wakes up suddenly!' 
+			end
+			puts "#{@name}'s stomach grumbles..." 
+		end
+	
+		if poopy?
+			if @asleep
+		  	@asleep = false
+				puts 'He wakes up suddenly!' 
+			end
+			puts "#{@name} does the potty dance..." 
+		end
+	end
+end
+
+puts "Enter a name for your pet DRAGON:"
+name = gets.chomp.strip.upcase
+pet = Dragon.new name
+
+pet.action_time!
\ No newline at end of file

From ff02e9667d2e7c4760f17da8ea3075e23658a46b Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Sun, 11 Sep 2016 23:28:19 +0100
Subject: [PATCH 20/24] Chapter 13. Orange treeeee

---
 ch13-creating-new-classes/orange_tree.rb | 61 +++++++++++++++++++++++-
 1 file changed, 59 insertions(+), 2 deletions(-)

diff --git a/ch13-creating-new-classes/orange_tree.rb b/ch13-creating-new-classes/orange_tree.rb
index 025d08907..23173d57b 100644
--- a/ch13-creating-new-classes/orange_tree.rb
+++ b/ch13-creating-new-classes/orange_tree.rb
@@ -5,7 +5,64 @@
 # have the tree die after 25 years.
 # check out the rspec spec/ch13/orange_tree_spec.rb to see what strings we're looking for in the responses.
 
-
 class OrangeTree
-  # your code here
+  
+  GROWTH = 0.4
+  FRUITING_AGE = 5
+  MAX_AGE = 25
+
+  def initialize
+  	@height = 0
+  	@orange_count = 0
+  	@age = 0
+  	@dead = false
+  end
+
+  def dead?
+  	@dead
+  end
+
+  def height
+  	if !dead?
+  		@height.round(1)
+  	else
+  		'A dead tree is not very tall. :('
+  	end
+  end
+
+  def count_the_oranges
+  	if !dead?
+  		@orange_count.to_int
+  	else
+  		'A dead tree has no oranges. :('
+  	end  	
+  end
+
+  def pick_an_orange
+  	if dead?
+  		'A dead tree has nothing to pick. :('
+  	elsif count_the_oranges >= 1
+  		@orange_count -= 1
+  		"Delicious!"
+  	else
+  		"No oranges on the tree :("
+  	end
+  end
+
+  def one_year_passes
+		@age += 1
+
+		if !dead? && (@age > MAX_AGE)
+			@dead = true
+			"Oh, no! The tree is too old, and has died. :("	
+		elsif dead?
+		  "A year later, the tree is still dead. :("
+		else
+			@height += GROWTH
+			if @age > FRUITING_AGE
+				@orange_count = @height * 15 - 25
+			end
+			"This year your tree grew to #{height}m tall, and produced #{count_the_oranges} oranges."
+		end
+  end
 end

From 3b22f012e83cd3350aadddba83fd06b9bcb7ac29 Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Mon, 12 Sep 2016 10:29:01 +0100
Subject: [PATCH 21/24] Chapter 14. Even better profiling

---
 ch14-blocks-and-procs/even_better_profiling.rb | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/ch14-blocks-and-procs/even_better_profiling.rb b/ch14-blocks-and-procs/even_better_profiling.rb
index b01b78fd8..18f1f60fc 100644
--- a/ch14-blocks-and-procs/even_better_profiling.rb
+++ b/ch14-blocks-and-procs/even_better_profiling.rb
@@ -1,3 +1,11 @@
 def profile block_description, &block
-  # your code here
-end
\ No newline at end of file
+  profiling_on = true
+  if profiling_on
+    start_time = Time.new
+    block.call    
+    duration = Time.new - start_time
+    puts "#{block_description}: #{duration} seconds"
+  else
+    block.call
+  end
+end

From 8b5b3222f7e4fdfc4f6cd430f761a4c45ce8ae67 Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Mon, 12 Sep 2016 10:39:30 +0100
Subject: [PATCH 22/24] Chapter 14. Grandpa clock

---
 ch14-blocks-and-procs/grandfather_clock.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ch14-blocks-and-procs/grandfather_clock.rb b/ch14-blocks-and-procs/grandfather_clock.rb
index 916f6d354..e2774ae7c 100644
--- a/ch14-blocks-and-procs/grandfather_clock.rb
+++ b/ch14-blocks-and-procs/grandfather_clock.rb
@@ -1,3 +1,3 @@
 def grandfather_clock &block
-  # your code here
+  Time.new.hour.times {	block.call } 
 end
\ No newline at end of file

From 56cd5b65477ff8dea0e85122f51ede4358b688d3 Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Mon, 12 Sep 2016 10:46:10 +0100
Subject: [PATCH 23/24] Chapter 14. Program logger

---
 ch14-blocks-and-procs/program_logger.rb | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/ch14-blocks-and-procs/program_logger.rb b/ch14-blocks-and-procs/program_logger.rb
index 0e2e18d57..3fb888817 100644
--- a/ch14-blocks-and-procs/program_logger.rb
+++ b/ch14-blocks-and-procs/program_logger.rb
@@ -1,3 +1,5 @@
-def log desc, &block
-  # your code here
+def program_log desc, &block
+  puts "Beginning \"#{desc}\"..."
+  result = block.call
+	puts "...\"#{desc}\" finished, returning: #{result}"
 end
\ No newline at end of file

From 654f1b6a68e967da1f8de376e3c3b2eccf45bdbf Mon Sep 17 00:00:00 2001
From: Tadas Majeris <tadas.majeris@gmail.com>
Date: Mon, 12 Sep 2016 11:03:01 +0100
Subject: [PATCH 24/24] Chapter 14. Better program loggerrr

---
 ch14-blocks-and-procs/better_program_logger.rb | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/ch14-blocks-and-procs/better_program_logger.rb b/ch14-blocks-and-procs/better_program_logger.rb
index 0e2e18d57..fe0a53691 100644
--- a/ch14-blocks-and-procs/better_program_logger.rb
+++ b/ch14-blocks-and-procs/better_program_logger.rb
@@ -1,3 +1,9 @@
-def log desc, &block
-  # your code here
+$nesting_depth = 0
+
+def better_log desc, &block
+	puts ' ' * $nesting_depth + "Beginning \"#{desc}\"..."
+  $nesting_depth += 1
+  result = block.call
+	$nesting_depth -= 1
+	puts ' ' * $nesting_depth + "...\"#{desc}\" finished, returning: #{result}"
 end
\ No newline at end of file