diff --git a/ch09-writing-your-own-methods/ask.rb b/ch09-writing-your-own-methods/ask.rb
index 01716eb35..9e9760e37 100644
--- a/ch09-writing-your-own-methods/ask.rb
+++ b/ch09-writing-your-own-methods/ask.rb
@@ -1,3 +1,14 @@
 def ask question
-  # your code here
+    # your code here
+    while true
+        puts question
+        reply = gets.chomp.downcase
+        if (reply == 'yes' || reply == 'no')
+            if reply == 'yes'
+                return true
+            else
+                return false
+            end
+        end
+    end
 end
\ No newline at end of file
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..8f4d0714a 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
+    # your code here
+    num = num.to_i
+    (puts "Invalid input. Choose a number between 1 and 3000"; return) if ((num.to_i < 1) || (num.to_i > 3000))
+  
+    numerals = {1000=>"M", 500=>"D", 100=>"C", 50=>"L", 10=>"X", 5=>"V", 1=>"I" }
+    roman = ""
+  
+    numerals.keys.each do |k|
+        n = num/k
+        if n > 0
+            roman += (numerals[k]*n)
+            num = num % k
+        end
+    end
+  return roman
 end
\ No newline at end of file
diff --git a/ch09-writing-your-own-methods/roman_numerals.rb b/ch09-writing-your-own-methods/roman_numerals.rb
index 5c93b59ac..95542d46a 100644
--- a/ch09-writing-your-own-methods/roman_numerals.rb
+++ b/ch09-writing-your-own-methods/roman_numerals.rb
@@ -1,3 +1,18 @@
 def roman_numeral num
-  # your code here
+    # your code here
+    num = num.to_i
+    (puts "Invalid input. Choose a number between 1 and 3000"; return) if ((num.to_i < 1) || (num.to_i > 3000))
+  
+    numerals = {1000=>"M", 500=>"D", 400=>"CD", 100=>"C", 90=>"XC", 50=>"L", 40=>"XL", 10=>"X", 9=>"IX", 5=>"V", 4=>"IV", 1=>"I" }
+    roman = ""
+  
+    numerals.keys.each do |k|
+        n = num/k
+        if n > 0
+            roman += numerals[k]*n
+            num = num % k
+        end
+    end
+    
+  return roman
 end
\ No newline at end of file
diff --git a/ch10-nothing-new/dictionary_sort.rb b/ch10-nothing-new/dictionary_sort.rb
index c9893d0fd..2b4fb62ec 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
+  return recursive_sort(arr, [])
+end
+
+def recursive_sort(unsorted_array, sorted_array)
+    return sorted_array if unsorted_array.empty?
+    #l = unsorted_array.length-1
+    smallest = unsorted_array.pop
+    unsorted2 = []
+    unsorted_array.each do |check|
+        if check.downcase < smallest.downcase
+            unsorted2 << smallest
+            smallest = check
+        else
+            unsorted2 << check
+        end
+    end
+    sorted_array << smallest
+
+    recursive_sort(unsorted2, sorted_array)
 end
\ No newline at end of file
diff --git a/ch10-nothing-new/english_number.rb b/ch10-nothing-new/english_number.rb
index c0129bc4e..aa007ad21 100644
--- a/ch10-nothing-new/english_number.rb
+++ b/ch10-nothing-new/english_number.rb
@@ -1,3 +1,123 @@
 def english_number number
-  # your code here
+  if number < 0  # No negative numbers.
+    return 'Please enter a number that isn\'t negative.'
+  end
+  if number == 0
+    return 'zero'
+  end
+
+  # No more special cases! No more returns!
+
+  numString = ''  # This is the string we will return.
+
+  onesPlace = ['one',     'two',       'three',    'four',     'five',
+               'six',     'seven',     'eight',    'nine']
+  tensPlace = ['ten',     'twenty',    'thirty',   'forty',    'fifty',
+               'sixty',   'seventy',   'eighty',   'ninety']
+  teenagers = ['eleven',  'twelve',    'thirteen', 'fourteen', 'fifteen',
+               'sixteen', 'seventeen', 'eighteen', 'nineteen']
+  nums = {'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'=> 10**6, 'thousand'=> 10**3, 'hundred'=> 10**2 }
+
+  # "left" is how much of the number we still have left to write out.
+  # "write" is the part we are writing out right now.
+  # write and left... get it?  :)
+  left  = number
+
+nums.each do |name,value|
+  #print name
+  write = left/value         # How many millions left to write out?
+  left  = left - write*value  # Subtract off those millions.
+
+if write > 0
+    # trillions
+    trillions  = english_number write
+    numString = numString + (english_number write) + " " + name.to_s
+ 
+    if left > 0
+      # So we don't write 'two hundredfifty-one'...
+      numString = numString + ' '
+    end
+  end
 end
+
+=begin
+write = left/1000000000000          # How many millions left to write out?
+  left  = left - write*1000000000000  # Subtract off those millions.
+
+  if write > 0
+    # Now here's a really sly trick:
+    hundreds  = english_number write
+    numString = numString + hundreds + ' hundred'
+    # That's called "recursion". So what did I just do?
+    # I told this method to call itself, but with "write" instead of
+    # "number". Remember that "write" is (at the moment) the number of
+    # hundreds we have to write out. After we add "hundreds" to
+    # "numString", we add the string ' hundred' after it.
+    # So, for example, if we originally called english_number with
+    # 1999 (so "number" = 1999), then at this point "write" would
+    # be 19, and "left" would be 99. The laziest thing to do at this
+    # point is to have english_number write out the 'nineteen' for us,
+    # then we write out ' hundred', and then the rest of
+    # english_number writes out 'ninety-nine'.
+
+    if left > 0
+      # So we don't write 'two hundredfifty-one'...
+      numString = numString + ' '
+    end
+  end
+=end
+#### ------------> TENS
+
+  write = left/10          # How many tens left to write out?
+  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",
+      # we have to make a special exception for these.
+      numString = numString + teenagers[left-1]
+      # The "-1" is because teenagers[3] is 'fourteen', not 'thirteen'.
+
+      # Since we took care of the digit in the ones place already,
+      # we have nothing left to write.
+      left = 0
+    else
+      numString = numString + tensPlace[write-1]
+      # The "-1" is because tensPlace[3] is 'forty', not 'thirty'.
+    end
+
+    if left > 0
+      # So we don't write 'sixtyfour'...
+      numString = numString + '-'
+    end
+  end
+
+  write = left  # How many ones left to write out?
+  left  = 0     # Subtract off those ones.
+
+  if write > 0
+    numString = numString + onesPlace[write-1]
+    # The "-1" is because onesPlace[3] is 'four', not 'three'.
+  end
+
+  # Now we just return "numString"...
+  return numString
+end
+
+puts english_number(  0)
+puts english_number(  9)
+puts english_number( 10)
+puts english_number( 11)
+puts english_number( 17)
+puts english_number( 32)
+puts english_number( 88)
+puts english_number( 99)
+puts english_number(100)
+puts english_number(101)
+puts english_number(234)
+puts english_number(3211)
+puts english_number(999999)
+puts english_number(1000000000000)
diff --git a/ch10-nothing-new/ninety_nine_bottles_of_beer.rb b/ch10-nothing-new/ninety_nine_bottles_of_beer.rb
index 801de24bd..763950176 100644
--- a/ch10-nothing-new/ninety_nine_bottles_of_beer.rb
+++ b/ch10-nothing-new/ninety_nine_bottles_of_beer.rb
@@ -1 +1,176 @@
-# your code here
\ No newline at end of file
+=begin
+https://pine.fm/LearnToProgram/chap_08.html
+
+Expand upon englishNumber. First, put in thousands. 
+So it should return 'one thousand' instead of 'ten hundred' 
+and 'ten thousand' instead of 'one hundred hundred'.
+Expand upon englishNumber some more. 
+Now put in millions, so you get 'one million' instead of 
+'one thousand thousand'. Then try adding billions and trillions. 
+How high can you go? 
+
+=end
+
+
+def weddingNumber number
+  if number < 0  # No negative numbers.
+    return 'Please enter a number that isn\'t negative.'
+  end
+  if number == 0
+    return 'zero'
+  end
+
+  # No more special cases! No more returns!
+
+  numString = ''  # This is the string we will return.
+
+  onesPlace = ['one',     'two',       'three',    'four',     'five',
+               'six',     'seven',     'eight',    'nine']
+  tensPlace = ['ten',     'twenty',    'thirty',   'forty',    'fifty',
+               'sixty',   'seventy',   'eighty',   'ninety']
+  teenagers = ['eleven',  'twelve',    'thirteen', 'fourteen', 'fifteen',
+               'sixteen', 'seventeen', 'eighteen', 'nineteen']
+
+  # "left" is how much of the number we still have left to write out.
+  # "write" is the part we are writing out right now.
+  # write and left... get it?  :)
+  left  = number
+
+#### ------------> TRILLIONS
+
+write = left/1000000000000          # How many millions left to write out?
+  left  = left - write*1000000000000  # Subtract off those millions.
+
+if write > 0
+    # trillions
+    trillions  = weddingNumber write
+    numString = numString + trillions + ' trillion'
+ 
+    if left > 0
+      # So we don't write 'two hundredfifty-one'...
+      numString = numString + ' and '
+    end
+  end
+
+#### ------------> BILLIONS
+
+write = left/1000000000          # How many millions left to write out?
+  left  = left - write*1000000000  # Subtract off those millions.
+
+if write > 0
+    # billions
+    billions  = weddingNumber write
+    numString = numString + billions + ' billion'
+ 
+    if left > 0
+      # So we don't write 'two hundredfifty-one'...
+      numString = numString + ' and '
+    end
+  end
+
+#### ------------> MILLIONS
+  write = left/1000000          # How many millions left to write out?
+  left  = left - write*1000000  # Subtract off those millions.
+
+if write > 0
+    # millions
+    millions  = weddingNumber write
+    numString = numString + millions + ' million'
+ 
+    if left > 0
+      # So we don't write 'two hundredfifty-one'...
+      numString = numString + ' and '
+    end
+  end
+
+#### ------------> THOUSANDS
+
+  write = left/1000          # How many thousands left to write out?
+  left  = left - write*1000  # Subtract off those thousands.
+
+if write > 0
+    # for thousands
+    hundreds  = weddingNumber write
+    numString = numString + hundreds + ' thousand'
+    
+    if left > 0
+      # So we don't write 'two hundredfifty-one'...
+      numString = numString + ', '
+    end
+  end
+
+#### ------------> HUNDREDS
+
+  write = left/100          # How many hundreds left to write out?
+  left  = left - write*100  # Subtract off those hundreds.
+
+  if write > 0
+    # Now here's a really sly trick:
+    hundreds  = weddingNumber write
+    numString = numString + hundreds + ' hundred'
+    # That's called "recursion". So what did I just do?
+    # I told this method to call itself, but with "write" instead of
+    # "number". Remember that "write" is (at the moment) the number of
+    # hundreds we have to write out. After we add "hundreds" to
+    # "numString", we add the string ' hundred' after it.
+    # So, for example, if we originally called englishNumber with
+    # 1999 (so "number" = 1999), then at this point "write" would
+    # be 19, and "left" would be 99. The laziest thing to do at this
+    # point is to have englishNumber write out the 'nineteen' for us,
+    # then we write out ' hundred', and then the rest of
+    # englishNumber writes out 'ninety-nine'.
+
+    if left > 0
+      # So we don't write 'two hundredfifty-one'...
+      numString = numString + ' and '
+    end
+  end
+
+#### ------------> TENS
+
+  write = left/10          # How many tens left to write out?
+  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",
+      # we have to make a special exception for these.
+      numString = numString + teenagers[left-1]
+      # The "-1" is because teenagers[3] is 'fourteen', not 'thirteen'.
+
+      # Since we took care of the digit in the ones place already,
+      # we have nothing left to write.
+      left = 0
+    else
+      numString = numString + tensPlace[write-1]
+      # The "-1" is because tensPlace[3] is 'forty', not 'thirty'.
+    end
+
+    if left > 0
+      # So we don't write 'sixtyfour'...
+      numString = numString + '-'
+    end
+  end
+
+  write = left  # How many ones left to write out?
+  left  = 0     # Subtract off those ones.
+
+  if write > 0
+    numString = numString + onesPlace[write-1]
+    # The "-1" is because onesPlace[3] is 'four', not 'three'.
+  end
+
+  # Now we just return "numString"...
+  numString
+end
+
+
+def ninety_nine_bottles_of_beer num
+while (num > 0)
+  puts weddingNumber(num) + " bottles of beer on the wall, " + weddingNumber(num) + " bottles of beer."
+  puts "Take one down and pass it around, " + weddingNumber(num-1) + " bottles of beer on the wall."
+  num -= 1
+end
+end
+
+ninety_nine_bottles_of_beer 99
diff --git a/ch10-nothing-new/shuffle.rb b/ch10-nothing-new/shuffle.rb
index a486ad94c..86a73d6a1 100644
--- a/ch10-nothing-new/shuffle.rb
+++ b/ch10-nothing-new/shuffle.rb
@@ -1,3 +1,20 @@
 def shuffle arr
   # your code here
+  shuff = []
+  
+  while !arr.empty?
+    rand_index = rand(arr.length)
+    #curr_index = 0
+    new_arr = []
+    arr.length.times do |i|
+      if i == rand_index
+        shuff << arr[rand_index]
+      else
+        new_arr << arr[i]
+      end
+    end
+    arr = new_arr
+  end
+  
+  shuff
 end
\ No newline at end of file
diff --git a/ch10-nothing-new/sort.rb b/ch10-nothing-new/sort.rb
index 44c6deb58..0b8fc4be5 100644
--- a/ch10-nothing-new/sort.rb
+++ b/ch10-nothing-new/sort.rb
@@ -1,3 +1,12 @@
-def sort arr
+def sort (arr)
   # your code here
+  print arr 
+  puts ""
+    return arr if arr.length <= 1
+    m = arr.pop
+    
+    left = arr.select {|x| x <= m}
+    right = arr.select{|x| x > m}
+    
+    sort(left) + [m] + sort(right)
 end
\ No newline at end of file
diff --git a/ch11-reading-and-writing/build_a_better_playlist.rb b/ch11-reading-and-writing/build_a_better_playlist.rb
index 3b31bd241..59313080c 100644
--- a/ch11-reading-and-writing/build_a_better_playlist.rb
+++ b/ch11-reading-and-writing/build_a_better_playlist.rb
@@ -1,3 +1,41 @@
 def music_shuffle filenames
-  # your code here
-end
+
+  arr = filenames.sort
+  l = filenames.length
+  mid = l/2
+  
+  5.times do |i|
+  li = 0
+  ri = mid
+  shuf = []
+  while shuf.length < l
+    if shuf.length%2 == 0
+      shuf << arr[li]
+      li+=1
+    else
+      shuf << arr[ri]
+      ri+=1
+    end
+    
+  end #while
+  #puts shuf
+  #print shuf
+  arr = shuf
+end # times do
+
+  
+  cut = rand(l)
+  l.times do |i|
+    filenames[(cut+i)%l] = arr[i]
+  end
+  filenames
+end # end of def
+
+songs = ['aa/bbb', 'aa/ccc', 'aa/ddd',
+'AAA/xxxx', 'AAA/yyyy', 'AAA/zzzz', 'foo/bar']
+
+puts(music_shuffle(songs))
+
+=begin
+
+=end
diff --git a/ch11-reading-and-writing/build_your_own_playlist.rb b/ch11-reading-and-writing/build_your_own_playlist.rb
index 801de24bd..5af13b23c 100644
--- a/ch11-reading-and-writing/build_your_own_playlist.rb
+++ b/ch11-reading-and-writing/build_your_own_playlist.rb
@@ -1 +1,31 @@
-# your code here
\ No newline at end of file
+def shuffle arr
+  # your code here
+  shuff = []
+  
+  while !arr.empty?
+    rand_index = rand(arr.length)
+    #curr_index = 0
+    new_arr = []
+    arr.length.times do |i|
+      if i == rand_index
+        shuff << arr[rand_index]
+      else
+        new_arr << arr[i]
+      end
+    end
+    arr = new_arr
+  end
+  shuff
+end
+
+def build_your_own_playlist 
+tracks = shuffle(Dir['**/*.{ogg,mp3,m4a,wma}'])
+File.open 'playlist.m3u', 'w' do |f|
+  tracks.each do |track|
+    f.write track+"\n"
+  end
+end
+puts "Playlist made!"
+end
+
+build_your_own_playlist
\ No newline at end of file
diff --git a/ch11-reading-and-writing/playlist.m3u b/ch11-reading-and-writing/playlist.m3u
new file mode 100644
index 000000000..d4d6328b2
--- /dev/null
+++ b/ch11-reading-and-writing/playlist.m3u
@@ -0,0 +1,5 @@
+Herbie hancock/02 Watermelon Man.wma
+Herbie hancock/03 Sly.wma
+Herbie hancock/04 Vein Melter.wma
+Herbie hancock/01 Chameleon.wma
+Herbie hancock/Head Hunters/02 Watermelon Man.wma
diff --git a/ch11-reading-and-writing/safer_picture_downloading.rb b/ch11-reading-and-writing/safer_picture_downloading.rb
index 801de24bd..8d6abd485 100644
--- a/ch11-reading-and-writing/safer_picture_downloading.rb
+++ b/ch11-reading-and-writing/safer_picture_downloading.rb
@@ -1 +1,114 @@
-# your code here
\ No newline at end of file
+# your code here
+=begin
+Safer picture downloading. Adapt the picture-downloading/file-renaming
+program to your computer by adding some safety features to make sure
+you never overwrite a file. A few methods you might find useful are
+File.exist? (pass it a filename, and it will return true or false) and exit (like if
+return and Napoleon had a baby—it kills your program right where it stands;
+this is good for spitting out an error message and then quitting).
+=end
+# This is where she stores her pictures before
+# she gets her YAML on and moves them to the server.
+# Just for my own convenience, I'll go there now.
+#Dir.chdir '/Photos/PictureInbox'
+# First we find all of the pictures to be moved.
+
+pic_names = Dir["**/*\.{jpg,JPG}"]
+
+puts 'What would you like to call this batch?'
+
+batch_name = gets.chomp
+
+puts
+
+print "Downloading #{pic_names.length} files: "
+
+# This will be our counter. We'll start at 1 today,
+
+# though normally I like to count from 0.
+
+pic_number = 1
+
+pic_names.each do |name|
+
+print '.' # This is our "progress bar".
+
+# Make sure we don't save over another file!!
+
+
+
+new_name = if pic_number < 10
+
+"#{batch_name}0#{pic_number}.jpg"
+
+else
+
+"#{batch_name}#{pic_number}.jpg"
+
+end
+
+i=0
+while File.exist?(new_name)
+    puts "That file already exists, renaming new file."
+    new_name = new_name[0..-5] + (i+=1).to_s + ".jpg"
+end
+i=0
+
+
+
+# This renames the picture, but since "name"
+# has a big long path on it, and "new_name"
+# doesn't, it also moves the file to the
+# current working directory, which is now
+# Katy's PictureInbox folder.
+# Since it's a *move*, this effectivey
+# downloads and deletes the originals.
+# And since this is a memory card, not a
+# hard drive, each of these takes a second
+# or so; hence, the little dots let her
+# know that my program didn't hose her machine.
+# (Some marriage advice from your favorite
+# author/programmer: it's all about the
+# little things.)
+=begin
+The first time I wrote
+this program, I forgot
+that little line that
+increments the
+counter. What
+happened? It copied
+every picture to the
+same new filename...
+over the previous
+picture! This
+effectively deleted
+every picture except
+for the last one to be
+copied. Good thing I
+always, always,
+always make
+backups. Because,
+you know, the thing
+about computers....
+=end
+
+# Now where were we? Oh, yeah...
+
+File.rename name, new_name
+
+# Finally, we increment the counter.
+
+pic_number = pic_number + 1
+
+end
+
+puts # This is so we aren't on progress bar line.
+
+puts 'Done, cutie!'
+=begin
+Nice! Of course, the full program I wrote for her also downloads the movies,
+deletes the thumbnails from the camera (since only the camera can use them),
+extracts the time and date from the actual .jpg or .avi file, and renames the file
+using that. It also makes sure never to copy over an existing file. Yep, it’s a
+pretty fancy program, but that’s for another day.
+=end
\ No newline at end of file
diff --git a/ch12-new-classes-of-objects/birthday_helper.rb b/ch12-new-classes-of-objects/birthday_helper.rb
index 801de24bd..b7988515f 100644
--- a/ch12-new-classes-of-objects/birthday_helper.rb
+++ b/ch12-new-classes-of-objects/birthday_helper.rb
@@ -1 +1,43 @@
-# your code here
\ No newline at end of file
+# your code here
+filename = 'birthdays.csv'
+birth_dates = { }
+months ={'Jan'=>1, 'Feb'=>2, 'Mar'=>3, 'Apr'=>4, 'May'=>5, 'Jun'=>6, 'Jul'=>7, 'Aug'=>8, 'Sep'=>9, 'Oct'=>10, 'Nov'=>11, 'Dec'=>12}
+
+(puts "Could not load birthdays from #{filename}"; exit) if !File.exists?(filename)
+puts "Loading birthdays from #{filename}..."
+
+File.open filename do |f| 
+f.each_line do |entry|
+name = entry.slice(0, entry.index(","))
+date = entry.slice(entry.index(",")+2, entry.length)
+birth_dates[name] = date
+end
+end
+
+puts 'Enter a name and their next birthday will be returned'
+name = gets.chomp
+(puts "Name not found in file, exiting..."; exit) if !birth_dates.keys.include?(name)
+
+date = birth_dates[name]
+date = date.split(" ")
+date[1] = date[1].chomp(",")
+year = date[2]
+day = date[1]
+
+month_string = date[0]
+month = months[month_string]
+
+today = Time.new
+curr_year = today.strftime("%Y")
+birthdate = Time.mktime(year,month,day)
+birthday = Time.mktime(curr_year.to_i,month,day)
+
+age = ((birthday - birthdate)/(60*60*24*365)).to_i
+
+if birthday > today
+puts name + '\'s next birthday will be ' + day.to_s + " " + month_string.to_s + ", #{curr_year}"
+puts 'and he/she will be ' + age.to_s + ' years old'
+else
+puts name + '\'s next birthday will be ' + day.to_s + " " + month_string.to_s + ", #{curr_year.to_i + 1}"
+puts 'and he/she will be ' + age.to_s + ' years old'
+end
\ No newline at end of file
diff --git a/ch12-new-classes-of-objects/birthdays.csv b/ch12-new-classes-of-objects/birthdays.csv
new file mode 100644
index 000000000..e5115be6a
--- /dev/null
+++ b/ch12-new-classes-of-objects/birthdays.csv
@@ -0,0 +1,8 @@
+Christopher Alexander, Oct 4, 1936
+Christopher Lambert, Mar 29, 1957
+Christopher Lee, May 27, 1922
+Christopher Lloyd, Oct 22, 1938
+Christopher Pine, Aug 3, 1976
+Christopher Plummer, Dec 13, 1927
+Christopher Walken, Mar 31, 1943
+The King of Spain, Jan 5, 1938
\ No newline at end of file
diff --git a/ch12-new-classes-of-objects/happy_birthday.rb b/ch12-new-classes-of-objects/happy_birthday.rb
index 801de24bd..3da0e7dca 100644
--- a/ch12-new-classes-of-objects/happy_birthday.rb
+++ b/ch12-new-classes-of-objects/happy_birthday.rb
@@ -1 +1,24 @@
-# your code here
\ No newline at end of file
+# your code here
+=begin
+Happy birthday! Ask what year a person was born in, then the month,
+and then the day. Figure out how old they are, and give them a big SPANK!
+for each birthday they have had.
+=end
+
+puts "What year were you born in?"
+year = gets.chomp
+puts "What month were you born in? (please enter 1-12 for month)"
+month = gets.chomp
+puts "What day of the month were you born?"
+day = gets.chomp
+
+now = Time.new
+birthday = Time.mktime(year.to_i, month.to_i, day.to_i)
+
+age = (now - birthday)/(60*60*24*365)
+
+puts "You are #{age.to_i} years old!"
+
+age.to_i.times do
+puts 'spank'
+end
\ No newline at end of file
diff --git a/ch12-new-classes-of-objects/one_billion_seconds.rb b/ch12-new-classes-of-objects/one_billion_seconds.rb
index 801de24bd..b22fbb472 100644
--- a/ch12-new-classes-of-objects/one_billion_seconds.rb
+++ b/ch12-new-classes-of-objects/one_billion_seconds.rb
@@ -1 +1,3 @@
-# your code here
\ No newline at end of file
+birth_time = Time.mktime(1983, 9, 11, 7, 40, 54)
+billion_seconds_old = birth_time + 1000000000
+puts billion_seconds_old
\ No newline at end of file
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..9e6118f2a 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 +1,24 @@
 def roman_to_integer roman
   # your code here
+  roman.upcase!
+  numerals = {"M"=>1000, "CM"=> 900, "D"=>500, "CD"=>400, "C"=>100, "XC"=>90, "L"=>50, "XL"=>40, "X"=>10, "IX"=>9, "V"=>5, "IV"=>4, "I"=>1 }
+    integer = 0
+    i=0
+    l = roman.length
+    until i == (l) do
+        if i < l-1
+            r = roman[i]+roman[i+1]
+            if numerals.keys.include?(r)
+                integer += numerals[r]
+                i+=2
+            else
+                integer += numerals[roman[i]]
+                i+=1
+            end
+        else
+            integer += numerals[roman[i]]
+            i+=1
+        end
+    end
+    return integer
 end
\ No newline at end of file
diff --git a/ch13-creating-new-classes/extend_built_in_classes.rb b/ch13-creating-new-classes/extend_built_in_classes.rb
index c3e793933..a3b051534 100644
--- a/ch13-creating-new-classes/extend_built_in_classes.rb
+++ b/ch13-creating-new-classes/extend_built_in_classes.rb
@@ -1,3 +1,25 @@
 class Integer
   # your code here
+  def factorial 
+      return "Number needs to be more than 0" if self < 0
+      return 1 if self <= 1
+      self * (self-1).factorial
+  end
+  
+  def to_roman
+    num = self
+    (puts "Invalid input. Choose a number between 1 and 3000"; return) if ((num.to_i < 1) || (num.to_i > 3000))
+  
+    numerals = {1000=>"M", 500=>"D", 100=>"C", 50=>"L", 10=>"X", 5=>"V", 1=>"I" }
+    roman = ""
+  
+    numerals.keys.each do |k|
+        n = num/k
+        if n > 0
+            roman += numerals[k]*n
+            num = num % k
+        end
+    end
+  return roman
+  end
 end
\ No newline at end of file
diff --git a/ch13-creating-new-classes/interactive_baby_dragon.rb b/ch13-creating-new-classes/interactive_baby_dragon.rb
index 801de24bd..c56dde19e 100644
--- a/ch13-creating-new-classes/interactive_baby_dragon.rb
+++ b/ch13-creating-new-classes/interactive_baby_dragon.rb
@@ -1 +1,165 @@
-# your code here
\ No newline at end of file
+# your code here
+=begin
+Write a program so that you can interact with your baby dragon. 
+You should be able to enter commands like feed and walk, 
+and have those methods be called on your dragon. Of course, 
+since what you are inputting are just strings, you will have 
+to have some sort of method dispatch, where your program checks 
+which string was entered, and then calls the appropriate method. 
+=end
+
+puts "Program starts"
+
+class Dragon
+
+  def initialize name
+    @name = name
+    @asleep = false
+    @stuffInBelly     = 10  # He's full.
+    @stuffInIntestine =  0  # He doesn't need to go.
+    @input = ""
+
+    puts @name + ' is born.'
+  end
+
+  def interact
+  		puts "How do you want to interact with the baby dragon?"
+  		puts "You can choose \"feed\", \"walk\", \"put to bed\", \"toss\" and \"rock\"."
+  		@input = gets.chomp
+
+  		while @input != "end"
+  			puts "How do you want to interact with the baby dragon?"
+  			puts "You can choose \"feed\", \"walk\", \"put to bed\", \"toss\", \"rock\", or \"end\" to finish."
+  			
+  			case @input
+
+  			when "feed"
+  				feed
+
+  			when "walk"
+  				walk
+
+  			when "put to bed"
+  				putToBed
+
+  			when "toss"
+  				toss
+
+  			when "rock"
+  				rock
+
+  			when "end"
+  				break
+
+  			else
+  				puts "That does not match any option."
+  			end
+  			@input = gets.chomp
+  		end
+  		puts "You say goodbye to the baby dragon"
+  end
+
+  def feed
+    puts 'You feed ' + @name + '.'
+    @stuffInBelly = 10
+    passageOfTime
+  end
+
+  def walk
+    puts 'You walk ' + @name + '.'
+    @stuffInIntestine = 0
+    passageOfTime
+  end
+
+  def putToBed
+    puts 'You put ' + @name + ' to bed.'
+    @asleep = true
+    3.times do
+      if @asleep
+        passageOfTime
+      end
+      if @asleep
+        puts @name + ' snores, filling the room with smoke.'
+      end
+    end
+    if @asleep
+      @asleep = false
+      puts @name + ' wakes up slowly.'
+    end
+  end
+
+  def toss
+    puts 'You toss ' + @name + ' up into the air.'
+    puts 'He giggles, which singes your eyebrows.'
+    passageOfTime
+  end
+
+  def rock
+    puts 'You rock ' + @name + ' gently.'
+    @asleep = true
+    puts 'He briefly dozes off...'
+    passageOfTime
+    if @asleep
+      @asleep = false
+      puts '...but wakes when you stop.'
+    end
+  end
+
+  private
+
+  # "private" means that the methods defined here are
+  # methods internal to the object.  (You can feed
+  # your dragon, but you can't ask him if he's hungry.)
+
+  def hungry?
+    # Method names can end with "?".
+    # Usually, we only do this if the method
+    # returns true or false, like this:
+    @stuffInBelly <= 2
+  end
+
+  def poopy?
+    @stuffInIntestine >= 8
+  end
+
+  def passageOfTime
+    if @stuffInBelly > 0
+      # Move food from belly to intestine.
+      @stuffInBelly     = @stuffInBelly     - 1
+      @stuffInIntestine = @stuffInIntestine + 1
+    else  # Our dragon is starving!
+      if @asleep
+        @asleep = false
+        puts 'He wakes up suddenly!'
+      end
+      puts @name + ' is starving!  In desperation, he ate YOU!'
+      exit  # This quits the program.
+    end
+
+    if @stuffInIntestine >= 10
+      @stuffInIntestine = 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 "You create a baby dragon"
+pet = Dragon.new 'Norbert'
+pet.interact
\ No newline at end of file
diff --git a/ch13-creating-new-classes/orange_tree.rb b/ch13-creating-new-classes/orange_tree.rb
index 025d08907..4fe969ed6 100644
--- a/ch13-creating-new-classes/orange_tree.rb
+++ b/ch13-creating-new-classes/orange_tree.rb
@@ -7,5 +7,60 @@
 
 
 class OrangeTree
-  # your code here
-end
+	def initialize
+		@height = 0
+		@age = 0
+		@orange_ount = 0
+		@alive = true
+	end
+
+	def height
+		if @alive
+			@height.round(1)
+		else
+		'A dead tree is not very tall. :('
+		end
+	end
+
+	def one_year_passes
+	  #method, which, when called, ages the tree one year.
+	  if @alive
+	  	@height += 0.4
+	  	@age += 1
+	  	@orange_count=0
+		if @age <= 5
+	        "This year your tree grew to #{@height.round(1)}m tall," +
+          " but is still too young to bear fruit."
+		elsif @age > 5 && @age <= 25
+	  		@orange_count = (@height * 15 - 25).to_i
+	  		"This year your tree grew to #{@height.round(1)}m tall, and produced #{@orange_count} oranges."
+		else 
+	  		@alive = false
+	  		'Oh, no! The tree is too old, and has died. :('
+		end
+	  else
+	  	'A year later, the tree is still dead. :('
+	  end
+	end
+
+	def count_the_oranges
+		if @alive
+			@orange_count
+		else
+		  	"A dead tree has no oranges. :("
+		end
+	end
+
+	def pick_an_orange
+		if @alive 
+			if @orange_count == 0
+				'You search every branch, but find no oranges.'
+			else
+		  		@orange_count -= 1
+		  		'You pick a juicy, delicious orange!'
+			end
+		else
+			'A dead tree has nothing to pick. :('
+		end
+	end
+end
\ No newline at end of file
diff --git a/ch14-blocks-and-procs/better_program_logger.rb b/ch14-blocks-and-procs/better_program_logger.rb
index 0e2e18d57..9fd3a78e1 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
+$depth = 0
+def better_log desc, &block
   # your code here
+  puts "#{" "*$depth}Beginning \"#{desc}\"..."
+  $depth +=1
+  result = block.call
+  $depth -=1
+  puts "#{" "*$depth}...\"#{desc}\" finished, returning: #{ result.to_s}"
 end
\ No newline at end of file
diff --git a/ch14-blocks-and-procs/even_better_profiling.rb b/ch14-blocks-and-procs/even_better_profiling.rb
index b01b78fd8..ece92afb4 100644
--- a/ch14-blocks-and-procs/even_better_profiling.rb
+++ b/ch14-blocks-and-procs/even_better_profiling.rb
@@ -1,3 +1,12 @@
+$profiling=true
 def profile block_description, &block
   # your code here
+  if $profiling
+    start_time = Time.new
+    block.call
+    duration = Time.new - start_time
+    puts "#{block_description}: #{duration} seconds"
+    else
+     block.call
+    end
 end
\ No newline at end of file
diff --git a/ch14-blocks-and-procs/grandfather_clock.rb b/ch14-blocks-and-procs/grandfather_clock.rb
index 916f6d354..6173e2fc1 100644
--- a/ch14-blocks-and-procs/grandfather_clock.rb
+++ b/ch14-blocks-and-procs/grandfather_clock.rb
@@ -1,3 +1,6 @@
 def grandfather_clock &block
   # your code here
+  Time.now.strftime("%I").to_i.times do
+      block.call
+  end
 end
\ No newline at end of file
diff --git a/ch14-blocks-and-procs/program_logger.rb b/ch14-blocks-and-procs/program_logger.rb
index 0e2e18d57..de83c4699 100644
--- a/ch14-blocks-and-procs/program_logger.rb
+++ b/ch14-blocks-and-procs/program_logger.rb
@@ -1,3 +1,6 @@
-def log desc, &block
+def program_log desc, &block
   # your code here
+  puts "Beginning \"#{desc}\"..."
+  result = block.call
+  puts "...\"#{desc}\" finished, returning: #{ result.to_s}"
 end
\ No newline at end of file