From 8a6b4a0145ddd1f623e40d6c1fcd97d98d4f3dec Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Thu, 8 Sep 2016 12:10:58 +0100
Subject: [PATCH 01/14] updated ask.rb

---
 ch09-writing-your-own-methods/ask.rb | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/ch09-writing-your-own-methods/ask.rb b/ch09-writing-your-own-methods/ask.rb
index 01716eb35..005ccf82c 100644
--- a/ch09-writing-your-own-methods/ask.rb
+++ b/ch09-writing-your-own-methods/ask.rb
@@ -1,3 +1,25 @@
 def ask question
-  # your code here
-end
\ No newline at end of file
+  while true
+    puts question
+    reply = gets.chomp.downcase
+
+    return true if reply =='yes'
+    return false if reply == 'no'
+    puts 'Please answer "yes" or "no".'
+  end
+end
+
+
+puts 'Hello, and thank you for...'
+puts
+
+ask 'Do you like eating tacos?'
+ask 'Do you like eating burritos?'
+wets_bed = ask 'Do you wet the bed?'
+ask 'Do you like eating chimichangas?'
+
+puts
+puts 'DEBRIEFING'
+puts 'Thank you for...'
+puts
+puts wets_bed

From a29673c9c384141fef5799a40e7d582ba1eefa72 Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Thu, 8 Sep 2016 13:55:44 +0100
Subject: [PATCH 02/14] old_school_roman_numerals

---
 .../old_school_roman_numerals.rb                     | 12 +++++++++++-
 1 file changed, 11 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..dfe53c1c3 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 +1,13 @@
 def old_roman_numeral num
   # your code here
-end
\ No newline at end of file
+
+roman = ''
+
+roman << 'M'*(num /1000)
+roman << 'D'*(num %1000 /500)
+roman << 'C'*(num %500 /100)
+roman << 'L'*(num %100 /50)
+roman << 'X'*(num %50 /10)
+roman << 'V'*(num %10 /5)
+roman << 'I'*(num %5 /1)
+end

From e75bee7546e0c99c12617f16cdea7f59f0e6a581 Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Thu, 8 Sep 2016 13:58:33 +0100
Subject: [PATCH 03/14] update old_school_roman_numerals

---
 ch09-writing-your-own-methods/old_school_roman_numerals.rb | 4 ++++
 1 file changed, 4 insertions(+)

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 dfe53c1c3..e17f81bcd 100644
--- a/ch09-writing-your-own-methods/old_school_roman_numerals.rb
+++ b/ch09-writing-your-own-methods/old_school_roman_numerals.rb
@@ -10,4 +10,8 @@ def old_roman_numeral num
 roman << 'X'*(num %50 /10)
 roman << 'V'*(num %10 /5)
 roman << 'I'*(num %5 /1)
+
+roman
 end
+
+puts old_roman_numeral(1991)

From 6a1b29eff9b63e57dae456af85bf0eeae3e8036e Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Thu, 8 Sep 2016 14:32:30 +0100
Subject: [PATCH 04/14] added roman_numerals.rb

---
 .../roman_numerals.rb                         | 42 ++++++++++++++++++-
 1 file changed, 40 insertions(+), 2 deletions(-)

diff --git a/ch09-writing-your-own-methods/roman_numerals.rb b/ch09-writing-your-own-methods/roman_numerals.rb
index 5c93b59ac..2da19b2f7 100644
--- a/ch09-writing-your-own-methods/roman_numerals.rb
+++ b/ch09-writing-your-own-methods/roman_numerals.rb
@@ -1,3 +1,41 @@
 def roman_numeral num
-  # your code here
-end
\ No newline at end of file
+
+thousand = num/1000
+hundred = num %1000 /100
+ten = num%100 / 10
+ones = num % 10 / 1
+
+roman = 'M' * thousand
+  if hundred ==9
+    roman << 'CM'
+  elsif hundred == 4
+    roman << 'CD'
+  else
+    roman << 'D' * (num %1000 /500)
+    roman << 'C' * (num %500 /100)
+  end
+
+  if ten == 9
+    roman << 'XC'
+  elsif ten == 4
+    roman << 'XL'
+  else
+    roman << 'L' * (num%100/50)
+    roman << 'X' * (num%50/10)
+  end
+
+  if ones == 9
+    roman << 'IX'
+  elsif ones == 4
+    roman << 'IV'
+  else
+    roman << 'V' * (num%10/5)
+    roman << 'I' * (num%5/1)
+  end
+
+roman
+
+
+end
+
+puts roman_numeral(1984)

From 7a6de70b1f535ec7e782c068d02a27e4ca23e462 Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Sun, 11 Sep 2016 16:11:58 +0100
Subject: [PATCH 05/14] rites_of_passage_sorting.rb

---
 ch10-nothing-new/rites_of_passage_sorting.rb | 29 ++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 ch10-nothing-new/rites_of_passage_sorting.rb

diff --git a/ch10-nothing-new/rites_of_passage_sorting.rb b/ch10-nothing-new/rites_of_passage_sorting.rb
new file mode 100644
index 000000000..4e882946f
--- /dev/null
+++ b/ch10-nothing-new/rites_of_passage_sorting.rb
@@ -0,0 +1,29 @@
+def shuffle arr
+  # your code here
+
+  def sort(some_array)
+    recursive_sort(some_array, [])
+  end
+
+  def recursive_sort(unsorted_array, sorted_array)
+    if unsorted_array.length <=0
+      return sorted_array
+    end
+
+    smallest = unsorted.pop
+    still_unsorted =[]
+
+    unsorted_array.each do |word|
+      if word < smallest
+        still_unsorted.push smallest
+        smallest = x
+      else
+        still_unsorted.push tested_object
+      end
+  end
+
+  sorted.push smallest
+
+  recursive_sort still_unsorted, sorted_array
+end
+puts(sort(['can','feel', 'like','singing','a', 'can']))

From f0df42b89b22535eca26cb8e47d1a2cbded215db Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Sun, 11 Sep 2016 16:15:05 +0100
Subject: [PATCH 06/14] shuffle.rb

---
 ch10-nothing-new/shuffle.rb | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ch10-nothing-new/shuffle.rb b/ch10-nothing-new/shuffle.rb
index a486ad94c..ab17c3c32 100644
--- a/ch10-nothing-new/shuffle.rb
+++ b/ch10-nothing-new/shuffle.rb
@@ -1,3 +1,4 @@
 def shuffle arr
-  # your code here
-end
\ No newline at end of file
+  arr.sort_by{rand}
+end
+puts shuffle(['this', 'is', 'a','shuffle','test'])

From e30744a8660833802b83e653d840e02ea7f12291 Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Sun, 11 Sep 2016 16:21:45 +0100
Subject: [PATCH 07/14] delete

---
 ch10-nothing-new/rites_of_passage_sorting.rb | 29 --------------------
 1 file changed, 29 deletions(-)
 delete mode 100644 ch10-nothing-new/rites_of_passage_sorting.rb

diff --git a/ch10-nothing-new/rites_of_passage_sorting.rb b/ch10-nothing-new/rites_of_passage_sorting.rb
deleted file mode 100644
index 4e882946f..000000000
--- a/ch10-nothing-new/rites_of_passage_sorting.rb
+++ /dev/null
@@ -1,29 +0,0 @@
-def shuffle arr
-  # your code here
-
-  def sort(some_array)
-    recursive_sort(some_array, [])
-  end
-
-  def recursive_sort(unsorted_array, sorted_array)
-    if unsorted_array.length <=0
-      return sorted_array
-    end
-
-    smallest = unsorted.pop
-    still_unsorted =[]
-
-    unsorted_array.each do |word|
-      if word < smallest
-        still_unsorted.push smallest
-        smallest = x
-      else
-        still_unsorted.push tested_object
-      end
-  end
-
-  sorted.push smallest
-
-  recursive_sort still_unsorted, sorted_array
-end
-puts(sort(['can','feel', 'like','singing','a', 'can']))

From ca0ec1897796f5d25f14a41f3d4d07038c0a6522 Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Sun, 11 Sep 2016 16:30:09 +0100
Subject: [PATCH 08/14] sort.rb

---
 ch10-nothing-new/sort.rb | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/ch10-nothing-new/sort.rb b/ch10-nothing-new/sort.rb
index 44c6deb58..a01a508c0 100644
--- a/ch10-nothing-new/sort.rb
+++ b/ch10-nothing-new/sort.rb
@@ -1,3 +1,25 @@
 def sort arr
-  # your code here
-end
\ No newline at end of file
+  rec_sort arr, []
+end
+
+def rec_sort unsorted, sorted
+  if unsorted.length <=0
+    return sorted
+  end
+
+  smallest = unsorted.pop
+  still_unsorted = []
+
+  unsorted.each do |word|
+    if word < smallest
+      still_unsorted.push smallest
+      smallest = word
+    else
+      still_unsorted.push word
+    end
+  end
+
+  sorted.push smallest
+  rec_sort still_unsorted, sorted
+end
+puts(sort(['can','feel','singing','like','a','can']))

From 03e1a0d1ee78f964ef7a444876f71fcb015e38bd Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Sun, 11 Sep 2016 16:34:23 +0100
Subject: [PATCH 09/14] dictionary sort

---
 ch10-nothing-new/dictionary_sort.rb | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/ch10-nothing-new/dictionary_sort.rb b/ch10-nothing-new/dictionary_sort.rb
index c9893d0fd..1ac08e3a1 100644
--- a/ch10-nothing-new/dictionary_sort.rb
+++ b/ch10-nothing-new/dictionary_sort.rb
@@ -1,3 +1,26 @@
 def dictionary_sort arr
-  # your code here
-end
\ No newline at end of file
+  rec_dict_sort arr,[]
+end
+
+def rec_dict_sort unsorted_array, sorted_array
+  if unsorted_array.length <=0
+    return sorted_array
+  end
+
+  smallest = unsorted_array.pop
+  still_unsorted = []
+
+  unsorted_array.each do |word|
+    if word.downcase < smallest.downcase
+      still_unsorted.push smallest
+      smallest = word
+    else
+      still_unsorted.push word
+    end
+  end
+
+  sorted_array.push smallest
+  rec_dict_sort still_unsorted, sorted_array
+end
+
+puts(dictionary_sort(['can','feel','like','singing','A','can']))

From f3b596516e90570ff1fb33048d98b8c69308eb50 Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Mon, 12 Sep 2016 09:42:36 +0100
Subject: [PATCH 10/14] english_number.rb

---
 ch10-nothing-new/english_number.rb | 63 +++++++++++++++++++++++++++++-
 1 file changed, 62 insertions(+), 1 deletion(-)

diff --git a/ch10-nothing-new/english_number.rb b/ch10-nothing-new/english_number.rb
index c0129bc4e..6c8cb5bfe 100644
--- a/ch10-nothing-new/english_number.rb
+++ b/ch10-nothing-new/english_number.rb
@@ -1,3 +1,64 @@
 def english_number number
-  # your code here
+  if number <0
+    return 'Please enter a number that isn\'t negative'
+  end
+  if number ==0
+    return 'zero'
+  end
+
+  num_string =""
+
+  ones_place = ['one','two','three','four','five','six','seven','eight','nine']
+  tens_place = ['ten','twenty','thirty','fourty','fifty','sixty','seventy','ninety']
+  teenagers = ['eleven','twelve','thirteen','fourteen','fifteen','sixteen','seventeen',
+              'eighteen','nineteen']
+  zillions =[['hundred', 2],['thousand',3],['million',6],['billion',9],
+              ['trillion',12],['quadrillion',15]
+,['quintillion',18],['sextillion',21],['septillion',24],
+['octillion',27],['nonillion',30],['decillion',33],['undecillion',39],
+['duodecillion',39],['tredecillion',42],['quattuordecillion',45],['quindecillion',48],
+['sexdecillion',51],['septendectillion',54],['octodecillion',57],['novemdecillion',60],
+['vigintillion',63],['googol',100]]
+
+#'left' is how much left of the number we still have t write
+#'write' is the part we are writing out right now
+
+left = number
+while zillions.length >0
+  zil_pair = zillions.pop
+  zil_name = zil_pair[0]
+  zil_base = 10 ** zil_pair[1]
+  write = left /zil_base
+  left = left - write*zil_base
+
+if write > 0
+  prefix =english_number write
+  num_string = num_string + prefix + ' ' + zil_name
+  if left > 0
+    num_string = num_string +' '
+  end
 end
+
+write = left/10
+left = left -write*10
+
+if write >0
+  if write ((write ==1) and (left >0))
+    num_string =num_string + teenagers[left-1]
+    left =0
+  else
+    num_string = num_string + tens_place[write-1]
+  end
+end
+
+write=left
+left=0
+if write >0
+  num_string = num_string+ones_place[write-1]
+end
+
+num_string
+end
+
+puts english_number(999)
+puts english_number(4352)  

From 34633449d19323e6352f5e7b479231544009535e Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Mon, 12 Sep 2016 09:52:38 +0100
Subject: [PATCH 11/14] ch11

---
 .../ninety_nine_bottles_of_beer.rb            | 76 +++++++++++++-
 .../build_a_better_playlist.rb                | 57 ++++++++++-
 .../build_your_own_playlist.rb                | 10 +-
 .../safer_picture_downloading.rb              | 99 ++++++++++++++++++-
 4 files changed, 238 insertions(+), 4 deletions(-)

diff --git a/ch10-nothing-new/ninety_nine_bottles_of_beer.rb b/ch10-nothing-new/ninety_nine_bottles_of_beer.rb
index 801de24bd..db29a1c99 100644
--- a/ch10-nothing-new/ninety_nine_bottles_of_beer.rb
+++ b/ch10-nothing-new/ninety_nine_bottles_of_beer.rb
@@ -1 +1,75 @@
-# your code here
\ No newline at end of file
+# your code heredef english_number number
+  if number <0
+    return 'Please enter a number that isn\'t negative'
+  end
+  if number ==0
+    return 'zero'
+  end
+
+  num_string =""
+
+  ones_place = ['one','two','three','four','five','six','seven','eight','nine']
+  tens_place = ['ten','twenty','thirty','fourty','fifty','sixty','seventy','ninety']
+  teenagers = ['eleven','twelve','thirteen','fourteen','fifteen','sixteen','seventeen',
+              'eighteen','nineteen']
+  zillions =[['hundred', 2],['thousand',3],['million',6],['billion',9],
+              ['trillion',12],['quadrillion',15]
+,['quintillion',18],['sextillion',21],['septillion',24],
+['octillion',27],['nonillion',30],['decillion',33],['undecillion',39],
+['duodecillion',39],['tredecillion',42],['quattuordecillion',45],['quindecillion',48],
+['sexdecillion',51],['septendectillion',54],['octodecillion',57],['novemdecillion',60],
+['vigintillion',63],['googol',100]]
+
+#'left' is how much left of the number we still have t write
+#'write' is the part we are writing out right now
+
+left = number
+while zillions.length >0
+  zil_pair = zillions.pop
+  zil_name = zil_pair[0]
+  zil_base = 10 ** zil_pair[1]
+  write = left /zil_base
+  left = left - write*zil_base
+
+if write > 0
+  prefix =english_number write
+  num_string = num_string + prefix + ' ' + zil_name
+  if left > 0
+    num_string = num_string +' '
+  end
+end
+
+write = left/10
+left = left -write*10
+
+if write >0
+  if write ((write ==1) and (left >0))
+    num_string =num_string + teenagers[left-1]
+    left =0
+  else
+    num_string = num_string + tens_place[write-1]
+  end
+end
+
+write=left
+left=0
+if write >0
+  num_string = num_string+ones_place[write-1]
+end
+
+num_string
+end
+
+num_at_start = 5
+num_now = num_at_start
+while num_now >2
+  puts enlgish_number(num_now).capitalize + ' bottles of beer on the wall, ' +
+    english_number(num_now) + 'bottles of beer!'
+    num_now = num_now -1
+    puts 'Take one down, pass it around, ' +
+    english_number(num_now) + ' bottles of beer on the wall!'
+  end
+  puts "Two bottles of beer on the wall, two bottles of beer!"
+  puts "Take one down, pass it around, one bottle of beer on the wall!"
+  puts "One bottle of beer on the wall, one bottle of beer!"
+  puts "take one down, pass it around, no more bottles of beer on the wall!"
diff --git a/ch11-reading-and-writing/build_a_better_playlist.rb b/ch11-reading-and-writing/build_a_better_playlist.rb
index 3b31bd241..dba748318 100644
--- a/ch11-reading-and-writing/build_a_better_playlist.rb
+++ b/ch11-reading-and-writing/build_a_better_playlist.rb
@@ -1,3 +1,58 @@
 def music_shuffle filenames
-  # your code here
+  songs_and_paths = filenames.map do |s|
+    [s, s.split('/')] # [song, path]
+  end
+
+  tree = {:root => []}
+
+  # put each song into the tree
+  insert_into_tree = proc do |branch, song, path|
+    if path.length == 0 # add to current branch
+      branch[:root] << song
+    else # delve deeper
+      sub_branch = path[0]
+      path.shift # like "pop", but pops off the front
+
+      if !branch[sub_branch]
+        branch[sub_branch] = {:root => []}
+      end
+
+      insert_into_tree[branch[sub_branch], song, path]
+    end
+  end
+
+  songs_and_paths.each{|sp| insert_into_tree[tree, *sp]}
+
+  # recursively:
+  # - shuffle sub-branches (and root)
+  # - weight each sub-branch (and root)
+  # - merge (shuffle) these groups together
+  shuffle_branch = proc do |branch|
+    shuffled_subs = []
+
+    branch.each do |key, unshuffled|
+      shuffled_subs << if key == :root
+      unshuffled # At this level, these are all duplicates.
+      else
+        shuffle_branch[unshuffled]
+      end
+    end
+
+    weighted_songs = []
+
+    shuffled_subs.each do |shuffled_songs|
+      shuffled_songs.each_with_index do |song, idx|
+        num = shuffled_songs.length.to_f
+        weight = (idx + rand) / num
+        weighted_songs << [song, weight]
+      end
+    end
+
+    weighted_songs.sort_by{|s,v| v}.map{|s,v| s}
+  end
+  shuffle_branch[tree]
 end
+
+# songs = ['aa/bbb', 'aa/ccc', 'aa/ddd',
+#          'AAA/xxxx', 'AAA/yyyy', 'AAA/zzzz', 'foo/bar']
+# puts(music_shuffle(songs))
diff --git a/ch11-reading-and-writing/build_your_own_playlist.rb b/ch11-reading-and-writing/build_your_own_playlist.rb
index 801de24bd..99195678e 100644
--- a/ch11-reading-and-writing/build_your_own_playlist.rb
+++ b/ch11-reading-and-writing/build_your_own_playlist.rb
@@ -1 +1,9 @@
-# your code here
\ No newline at end of file
+all_oggs = shuffle(Dir['**/*.ogg'])
+
+File.open 'playlist.m3u', 'w' do |f|
+  all_oggs.each do |ogg|
+    f.write ogg+"\n"
+  end
+end
+
+puts 'Done!'
diff --git a/ch11-reading-and-writing/safer_picture_downloading.rb b/ch11-reading-and-writing/safer_picture_downloading.rb
index 801de24bd..8ca1f9180 100644
--- a/ch11-reading-and-writing/safer_picture_downloading.rb
+++ b/ch11-reading-and-writing/safer_picture_downloading.rb
@@ -1 +1,98 @@
-# your code here
\ No newline at end of file
+# your code here# For Katy, with love.
+
+### Download pictures from camera card.
+
+require 'win32ole'
+
+STDOUT.sync = true
+Thread.abort_on_exception = true
+
+Dir.chdir 'C:\Documents and Settings\Anna\Desktop\Dropbox\picture'
+
+# Always look here for pics.
+
+pic_names = Dir['!undated/**/*.{jpg,avi}']
+thm_names = Dir['!undated/**/*.{thm}' ]
+
+# Scan for memory cards in the card reader.
+WIN32OLE.new("Scripting.FileSystemObject").Drives.each() do |x|
+  #driveType 1 is removable disk
+  if x.DriveType == 1 && x.IsReady
+    pic_names += Dir[x.DriveLetter+':/**/*.{jpg,avi}']
+    thm_names += Dir[x.DriveLetter+':/**/*.{thm}' ]
+  end
+end
+
+months = %w(jan feb mar apr may jun jul aug sep oct nov dec)
+
+encountered_error = false
+
+print "Downloading #{pic_names.size} files: "
+
+pic_names.each do |name|
+  print '.'
+  is_movie = (name[-3..-1].downcase == 'avi')
+
+  if is_movie
+    orientation = 0
+    new_name = File.open(name) do |f|
+      f.seek(0x144,IO::SEEK_SET)
+      f.read(20)
+    end
+
+    new_name[0...3] = '%.2d' % (1 + months.index(new_name[0...3].downcase))
+    new_name = new_name[-4..-1] + ' ' + new_name[0...-5]
+  else
+    new_name, orientation = File.open(name) do |f|
+      f.seek(0x36, IO::SEEK_SET)
+      orientation_ = f.read(1)[0]
+      f.seek(0xbc, IO::SEEK_SET)
+      new_name_ = f.read(19)
+      [new_name_, orientation_]
+    end
+  end
+
+  [4,7,10,13,16].each {|n| new_name[n] = '.'}
+  if new_name[0] != '2'[0]
+    encountered_error = true
+    puts "\n"+'ERROR: Could not process "'+name+
+      '" because it\'s not in the proper format!'
+    next
+  end
+
+  save_name = new_name + (is_movie ? '.orig.avi' : '.jpg')
+  # Make sure we don't save over another file!!
+  while FileTest.exist? save_name
+    new_name += 'a'
+    save_name = new_name + (is_movie ? '.orig.avi' : '.jpg')
+  end
+
+
+  case orientation
+  when 6
+    `convert "#{name}" -rotate "90>" "#{save_name}"`
+    File.delete name
+  when 8
+    `convert "#{name}" -rotate "-90>" "#{save_name}"`
+    File.delete name
+  else
+    File.rename name, save_name
+  end
+end
+
+print "\nDeleting #{thm_names.size} THM files: "
+thm_names.each do |name|
+  print '.'
+  File.delete name
+end
+
+# If something bad happened, make sure she
+
+# sees the error message before the window closes.
+
+if encountered_error
+  puts
+  puts "Press [Enter] to finish."
+  puts
+  gets
+end

From f9f5342414fd3b0cd4d44ed97167209f345a07d1 Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Mon, 12 Sep 2016 09:54:39 +0100
Subject: [PATCH 12/14] ch12

---
 .../birthday_helper.rb                        | 29 +++++++++++++++-
 ch12-new-classes-of-objects/happy_birthday.rb | 19 ++++++++++-
 .../one_billion_seconds.rb                    |  2 +-
 ...party_like_its_roman_to_integer_mcmxcix.rb | 33 +++++++++++++++++--
 4 files changed, 78 insertions(+), 5 deletions(-)

diff --git a/ch12-new-classes-of-objects/birthday_helper.rb b/ch12-new-classes-of-objects/birthday_helper.rb
index 801de24bd..1d809aefc 100644
--- a/ch12-new-classes-of-objects/birthday_helper.rb
+++ b/ch12-new-classes-of-objects/birthday_helper.rb
@@ -1 +1,28 @@
-# your code here
\ No newline at end of file
+birth_dates = {}
+
+File.readlines('birthdates.txt').each do |line|
+  name, date, year = line.split(',')
+  birth_dates[name] = Time.gm(year, *(date.split))
+end
+
+puts 'Whose birthday would you like to know?'
+name = gets.chomp
+bday = birth_dates[name]
+
+if bday == nil
+  puts "Oooh, I don't know that one..."
+else
+  now = Time.new
+  age = now.year - bday.year
+
+  if now.month > bday.month || (now.month == bday.month && now.day > bday.day)
+    age += 1
+  end
+
+  if now.month == bday.month && now.day == bday.day
+    puts "#{name} turns #{age} TODAY!!"
+  else
+    date = bday.strftime "%b %d"
+    puts "#{name} will be #{age} on #{date}."
+  end
+end
diff --git a/ch12-new-classes-of-objects/happy_birthday.rb b/ch12-new-classes-of-objects/happy_birthday.rb
index 801de24bd..7d43b7ef7 100644
--- a/ch12-new-classes-of-objects/happy_birthday.rb
+++ b/ch12-new-classes-of-objects/happy_birthday.rb
@@ -1 +1,18 @@
-# your code here
\ No newline at end of file
+puts 'What year were you born?'
+b_year = gets.chomp.to_i
+
+puts 'What month were you born? (1-12)'
+b_month = gets.chomp.to_i
+
+puts 'What day of the month were you born?'
+b_day = gets.chomp.to_i
+
+b = Time.local(b_year, b_month, b_day)
+t = Time.new
+
+age = 1
+
+while Time.local(b_year + age, b_month, b_day) <= t
+  puts 'SPANK!'
+  age = age + 1
+end
diff --git a/ch12-new-classes-of-objects/one_billion_seconds.rb b/ch12-new-classes-of-objects/one_billion_seconds.rb
index 801de24bd..15e4a71e9 100644
--- a/ch12-new-classes-of-objects/one_billion_seconds.rb
+++ b/ch12-new-classes-of-objects/one_billion_seconds.rb
@@ -1 +1 @@
-# your code here
\ No newline at end of file
+puts(Time.gm(1976, 8, 3, 13, 31) + 10**9)
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..bc0107107 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 +1,32 @@
 def roman_to_integer roman
-  # your code here
-end
\ No newline at end of file
+  digit_vals = {'i' => 1,
+                'v' => 5,
+                'x' => 10,
+                'l' => 50,
+                'c' => 100,
+                'd' => 500,
+                'm' => 1000}
+  total = 0
+  prev = 0
+  roman.reverse.each_char do |c_or_C|
+    c = c_or_C.downcase
+    val = digit_vals[c]
+    if !val
+      puts 'This is not a valid roman numeral!'
+      return
+    end
+
+    if val < prev
+      val *= -1
+    else
+      prev = val
+    end
+
+    total += val
+  end
+
+  total
+end
+
+puts(roman_to_integer('mcmxcix'))
+puts(roman_to_integer('CCCLXV'))

From e99ee963d879b6eb0184c916c335eca2d8d0cc03 Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Mon, 12 Sep 2016 09:58:44 +0100
Subject: [PATCH 13/14] ch13

---
 .../extend_built_in_classes.rb                | 29 +++++++++-
 .../interactive_baby_dragon.rb                | 27 ++++++++-
 ch13-creating-new-classes/orange_tree.rb      | 58 ++++++++++++++++++-
 3 files changed, 110 insertions(+), 4 deletions(-)

diff --git a/ch13-creating-new-classes/extend_built_in_classes.rb b/ch13-creating-new-classes/extend_built_in_classes.rb
index c3e793933..7ac0b5ef8 100644
--- a/ch13-creating-new-classes/extend_built_in_classes.rb
+++ b/ch13-creating-new-classes/extend_built_in_classes.rb
@@ -1,3 +1,28 @@
+class Array
+  def shuffle
+    sort_by{rand}
+  end
+end
+
+
 class Integer
-  # your code here
-end
\ No newline at end of file
+ def factorial
+   raise 'Must not use negative integer' if self < 0
+   (self <= 1) ? 1 : self * (self-1).factorial
+ end
+ def to_roman
+
+   raise 'Must use positive integer' if self <= 0
+   roman = ''
+   roman << 'M' * (self / 1000)
+   roman << 'D' * (self % 1000 / 500)
+   roman << 'C' * (self % 500 / 100)
+   roman << 'L' * (self % 100 / 50)
+   roman << 'X' * (self % 50 / 10)
+   roman << 'V' * (self % 10 / 5)
+   roman << 'I' * (self % 5 / 1)
+   roman
+ end
+end
+
+p 7.factorial.to_roman.split(//).shuffle
diff --git a/ch13-creating-new-classes/interactive_baby_dragon.rb b/ch13-creating-new-classes/interactive_baby_dragon.rb
index 801de24bd..e66d66bf0 100644
--- a/ch13-creating-new-classes/interactive_baby_dragon.rb
+++ b/ch13-creating-new-classes/interactive_baby_dragon.rb
@@ -1 +1,26 @@
-# your code here
\ No newline at end of file
+
+puts 'What would you like to name your baby dragon?'
+name = gets.chomp
+pet = Dragon.new name
+
+while true
+  puts
+  puts 'commands: feed, toss, walk, rock, put to bed, exit'
+  command = gets.chomp
+
+  if command == 'exit'
+    exit
+  elsif command == 'feed'
+    pet.feed
+  elsif command == 'toss'
+    pet.toss
+  elsif command == 'walk'
+    pet.walk
+  elsif command == 'rock'
+    pet.rock
+  elsif command == 'put to bed'
+    pet.put_to_bed
+  else
+    puts 'Huh? Please type one of the commands.'
+  end
+end
diff --git a/ch13-creating-new-classes/orange_tree.rb b/ch13-creating-new-classes/orange_tree.rb
index 025d08907..fd5d49af9 100644
--- a/ch13-creating-new-classes/orange_tree.rb
+++ b/ch13-creating-new-classes/orange_tree.rb
@@ -6,6 +6,62 @@
 # 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
+  def initialize
+    @height = 0
+    @orange_count = 0
+    @alive = true
+  end
+
+  def height
+    if @alive
+      @height.round(1)
+    else
+      'A dead tree is not very tall. :('
+    end
+  end
+
+  def count_the_oranges
+    if @alive
+      @orange_count
+    else
+      'A dead tree has no oranges. :('
+    end
+  end
+
+  def one_year_passes
+    if @alive
+      @height = @height + 0.4
+      @orange_count = 0 # old oranges fall off
+      if @height > 10 && rand(2) > 0
+        # tree dies
+        @alive = false
+        'Oh, no! The tree is too old, and has died. :('
+      elsif @height > 2
+        # new oranges grow
+        @orange_count = (@height * 15 - 25).to_i
+        "This year your tree grew to #{@height.round(1)}m tall," +
+          " and produced #{@orange_count} oranges."
+      else
+        "This year your tree grew to #{@height.round(1)}m tall," +
+          " but is still too young to bear fruit."
+      end
+    else
+      'A year later, the tree is still dead. :('
+    end
+  end
+
+  def pick_an_orange
+    if @alive
+      if @orange_count > 0
+        @orange_count = @orange_count - 1
+        'You pick a juicy, delicious orange!'
+      else
+        'You search every branch, but find no oranges.'
+      end
+    else
+      'A dead tree has nothing to pick. :('
+    end
+  end
 end

From 1a92dd5746faacc199273ac1c5541498ce0795d2 Mon Sep 17 00:00:00 2001
From: Anna Beddow <anna.beddow@gmail.com>
Date: Mon, 12 Sep 2016 10:00:46 +0100
Subject: [PATCH 14/14] ch14

---
 .../better_program_logger.rb                  | 31 +++++++++++++++++--
 .../even_better_profiling.rb                  | 15 +++++++--
 ch14-blocks-and-procs/grandfather_clock.rb    | 19 ++++++++++--
 ch14-blocks-and-procs/program_logger.rb       | 18 +++++++++--
 4 files changed, 75 insertions(+), 8 deletions(-)

diff --git a/ch14-blocks-and-procs/better_program_logger.rb b/ch14-blocks-and-procs/better_program_logger.rb
index 0e2e18d57..80f61e677 100644
--- a/ch14-blocks-and-procs/better_program_logger.rb
+++ b/ch14-blocks-and-procs/better_program_logger.rb
@@ -1,3 +1,30 @@
+$logger_depth = 0
+
 def log desc, &block
-  # your code here
-end
\ No newline at end of file
+  prefix = ' '*$logger_depth
+
+  puts prefix + 'Beginning "' + desc + '"...'
+
+  $logger_depth = $logger_depth + 1
+
+  result = block.call
+
+  $logger_depth = $logger_depth - 1
+  puts prefix + '..."' + desc + '" finished, returning: ' + result.to_s
+end
+
+log 'outer block' do
+  log 'some little block' do
+    log 'teeny-tiny block' do
+      'lOtS oF lOVe'.downcase
+    end
+
+    7 * 3 * 2
+  end
+
+  log 'yet another block' do
+    '!doof naidnI evol I'.reverse
+  end
+
+  '0' == "0"
+end
diff --git a/ch14-blocks-and-procs/even_better_profiling.rb b/ch14-blocks-and-procs/even_better_profiling.rb
index b01b78fd8..3c8b429c0 100644
--- a/ch14-blocks-and-procs/even_better_profiling.rb
+++ b/ch14-blocks-and-procs/even_better_profiling.rb
@@ -1,3 +1,14 @@
 def profile block_description, &block
-  # your code here
-end
\ No newline at end of file
+  # To turn profiling on/off, set this
+  # to true/false.
+  profiling_on = false
+  if profiling_on
+    start_time = Time.new
+    block.call
+
+    duration = Time.new - start_time
+    puts "#{block_description}: #{duration} seconds"
+  else
+    block.call
+  end
+end
diff --git a/ch14-blocks-and-procs/grandfather_clock.rb b/ch14-blocks-and-procs/grandfather_clock.rb
index 916f6d354..545407178 100644
--- a/ch14-blocks-and-procs/grandfather_clock.rb
+++ b/ch14-blocks-and-procs/grandfather_clock.rb
@@ -1,3 +1,18 @@
 def grandfather_clock &block
-  # your code here
-end
\ No newline at end of file
+  hour = Time.new.hour
+
+  if hour >= 13
+    hour = hour - 12
+  end
+
+  if hour == 0
+    hour = 12
+  end
+
+  hour.times do
+    block.call
+  end
+end
+grandfather_clock do
+  puts 'DONG!'
+end
diff --git a/ch14-blocks-and-procs/program_logger.rb b/ch14-blocks-and-procs/program_logger.rb
index 0e2e18d57..559789486 100644
--- a/ch14-blocks-and-procs/program_logger.rb
+++ b/ch14-blocks-and-procs/program_logger.rb
@@ -1,3 +1,17 @@
 def log desc, &block
-  # your code here
-end
\ No newline at end of file
+  puts 'Beginning "' + desc + '"...'
+  result = block.call
+  puts '..."' + desc + '" finished, returning: ' + result.to_s
+end
+
+log 'outer block' do
+  log 'some little block' do
+    1**1 + 2**2
+  end
+
+  log 'yet another block' do
+    '!doof iahT ekil I'.reverse
+  end
+
+  '0' == 0
+end