adding 34, 35, 39, 40

ex34.rb

@@ -30,3 +30,221 @@
 puts animals.last
 
 
+#~ > irb
+#>> 
+#?> 
+#?> 
+#?> dogs = ['beagle', 'dauschund', 'great dane']
+#=> ["beagle", "dauschund", "great dane"]
+#>> dogs
+#=> ["beagle", "dauschund", "great dane"]
+#>> 
+#?> 
+#?> 
+#?> 
+#?> dogs.length
+#=> 3
+#>> 
+#?> 
+#?> 
+#?> dogs[0]
+#=> "beagle"
+#>> 
+#?> 
+#?> 
+#?> 
+#?> dogs[0].class
+#=> String
+#>> 
+#?> 
+#?> 
+#?> dogs[0].swapcase
+#=> "BEAGLE"
+#>> 
+#?> 
+#?> 
+#?> 
+#?> dogs.swapcase
+#NoMethodError: undefined method `swapcase' for ["beagle", "dauschund", "great dane"]:Array
+#  from (irb):28
+#>> dogs[-1]
+#=> "great dane"
+#>> 
+#?> 
+#?> 
+#?> dogs.each { |i
+#>> 
+#
+#^C
+#>> 
+#?> 
+#?> dogs.each { |dog| puts dog }
+#beagle
+#dauschund
+#great dane
+#=> ["beagle", "dauschund", "great dane"]
+#>> 
+#?> 
+#?> 
+#?> 
+#?> dogs.each { |dog| puts dog }.swapcase
+#beagle
+#dauschund
+#great dane
+#NoMethodError: undefined method `swapcase' for ["beagle", "dauschund", "great dane"]:Array
+#  from (irb):41
+#>> 
+#?> 
+#?> dogs.each { |dog| puts dog.swapcase }
+#BEAGLE
+#DAUSCHUND
+#GREAT DANE
+#=> ["beagle", "dauschund", "great dane"]
+#>> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> dogs.each { |dog| puts dog.reverse.swapcase }
+#ELGAEB
+#DNUHCSUAD
+#ENAD TAERG
+#=> ["beagle", "dauschund", "great dane"]
+#>> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> dogs
+#=> ["beagle", "dauschund", "great dane"]
+#>> 
+#?> 
+#?> 
+#?> 
+#?> dogs.each { |dog| puts dog.class }
+#String
+#String
+#String
+#=> ["beagle", "dauschund", "great dane"]
+#>> 
+#?> 
+#?> 
+#?> dogs.each { |dog| puts dog.class; puts dog }
+#String
+#beagle
+#String
+#dauschund
+#String
+#great dane
+#=> ["beagle", "dauschund", "great dane"]
+#>> 
+#?> 
+#?> dogs.each { |dog| put dog.class; put dog }
+#NoMethodError: undefined method `put' for main:Object
+#  from (irb):70
+#  from (irb):70:in `each'
+#  from (irb):70
+#>> dogs.each { |dog| put dog.class; puts dog }
+#NoMethodError: undefined method `put' for main:Object
+#  from (irb):71
+#  from (irb):71:in `each'
+#  from (irb):71
+#>> 
+#?> 
+#?> 
+#?> dogs.each { |dog| print dog.class; put dog }
+#StringNoMethodError: undefined method `put' for main:Object
+#  from (irb):75
+#  from (irb):75:in `each'
+#  from (irb):75
+#>> 
+#?> 
+#?> 
+#?> dogs.each { |dog| print dog.class; puts dog }
+#Stringbeagle
+#Stringdauschund
+#Stringgreat dane
+#=> ["beagle", "dauschund", "great dane"]
+#>> 
+#?> 
+#?> 
+#?> dogs.each { |dog| print dog.class; print " " puts dog }
+#SyntaxError: compile error
+#(irb):83: syntax error, unexpected tIDENTIFIER, expecting '}'
+#dogs.each { |dog| print dog.class; print " " puts dog }
+#                                                 ^
+#  from (irb):83
+#>> dogs.each { |dog| print dog.class; print " "; puts dog }
+#String beagle
+#String dauschund
+#String great dane
+#=> ["beagle", "dauschund", "great dane"]
+#>> dogs.each { |dog| print dog.class; print " "; puts dog }
+#String beagle
+#String dauschund
+#String great dane
+#=> ["beagle", "dauschund", "great dane"]
+#>> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> dogs.each { |dog| print dog.class; print " "; puts dog.reverse.swapcase }
+#String ELGAEB
+#String DNUHCSUAD
+#String ENAD TAERG
+#=> ["beagle", "dauschund", "great dane"]
+#>> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> dogs.first
+#=> "beagle"
+#>> dogs.first.class
+#=> String
+#>> 
+#?> 
+#?> 
+#?> dogs.first.reverse
+#=> "elgaeb"
+#>> 
+#?> 
+#?> 
+#?> dogs.first.class.reverse
+#NoMethodError: undefined method `reverse' for String:Class
+#  from (irb):110
+#>> 
+#?> 
+#?> 
+#?> dogs.first.reverse.swapcase
+#=> "ELGAEB"
+#>> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> 
+#?> dogs[0]
+#=> "beagle"
+#>> 
+#?> 
+#?> 
+#?> 
+#?> puts dogs
+#beagle
+#dauschund
+#great dane
+#=> nil
+#>> puts dogs[0]
+#beagle
+#=> nil
+#>> 

ex35.rb

@@ -0,0 +1,87 @@
+#!/usr/bin/env ruby
+
+def prompt()
+  print "> "
+end
+
+def gold_room()
+  puts "This room is full of gold. How much do you take?"
+
+  prompt; next_move = gets.chomp
+  if next_move.include? "0" or next_move.include? "1"
+    how_much = next_move.to_i()
+  else
+    dead("Man, learn to type a number.")
+  end
+
+  if how_much < 50
+    puts "Nice, you're not greedy, you win!"
+    Process.exit(0)
+  else
+    dead("You greedy bastard!")
+  end
+end
+
+def bear_room()
+  puts "There is a bear here."
+  puts "The bear has a bunch of honey."
+  puts "The fat bear is in front of another door."
+  puts "How are you going to move the bear?"
+  bear_moved = false
+
+  while true
+    prompt; next_move = gets.chomp
+
+    if next_move == "take honey"
+      dead("The bear looks at you then slaps your face off.")
+    elsif next_move == "taunt bear" and not bear_moved
+      puts "The bear has moved from the door. You can go through it now."
+      bear_moved = true
+    elsif next_move == "taunt bear" and bear_moved
+      dead("The bear gets pissed off and chews your leg off.")
+    elsif next_move == "open door" and bear_moved
+      gold_room()
+    else
+      puts "I got no idea what that means."
+    end
+  end
+end
+
+def cthulu_room()
+  puts "Here you see the great evil Cthulu"
+  puts "He stares at you and you go insane."
+  puts "Do you flee or eat your head?"
+
+  prompt; next_move = gets.chomp
+
+  if next_move.include? "flee"
+    start()
+  elsif next_move.include? "head"
+    dead("Well that was tasty!")
+  else
+    cthulu_room()
+  end
+end
+
+def dead(why)
+  puts "#{why} Good job!"
+  Process.exit(0)
+end
+
+def start()
+  puts "You are in a dark room."
+  puts "There is a door to your left and right."
+  puts "Which one do you take?"
+
+  prompt; next_move = gets.chomp
+
+  if next_move == "left"
+    bear_room()
+  elsif next_move == "right"
+    cthulu_room()
+  else
+    dead("You stumble around the room until you starve.")
+  end
+end
+
+start()

ex35_4.rb

@@ -0,0 +1,87 @@
+#!/usr/bin/env ruby
+
+def prompt()
+  print "> "
+end
+
+def gold_room()
+  puts "This room is full of gold. How much do you take?"
+
+  prompt; next_move = gets.chomp.to_i
+  if next_move > 1
+    how_much = next_move
+  else
+    dead("Man, learn to type a number... and 0 is for luzers")
+  end
+
+  if how_much < 50
+    puts "Nice, you're not greedy, you win!"
+    Process.exit(0)
+  else
+    dead("You greedy bastard!")
+  end
+end
+
+def bear_room()
+  puts "There is a bear here."
+  puts "The bear has a bunch of honey."
+  puts "The fat bear is in front of another door."
+  puts "How are you going to move the bear?"
+  bear_moved = false
+
+  while true
+    prompt; next_move = gets.chomp
+
+    if next_move == "take honey"
+      dead("The bear looks at you then slaps your face off.")
+    elsif next_move == "taunt bear" and not bear_moved
+      puts "The bear has moved from the door. You can go through it now."
+      bear_moved = true
+    elsif next_move == "taunt bear" and bear_moved
+      dead("The bear gets pissed off and chews your leg off.")
+    elsif next_move == "open door" and bear_moved
+      gold_room()
+    else
+      puts "I got no idea what that means."
+    end
+  end
+end
+
+def cthulu_room()
+  puts "Here you see the great evil Cthulu"
+  puts "He stares at you and you go insane."
+  puts "Do you flee or eat your head?"
+
+  prompt; next_move = gets.chomp
+
+  if next_move.include? "flee"
+    start()
+  elsif next_move.include? "head"
+    dead("Well that was tasty!")
+  else
+    cthulu_room()
+  end
+end
+
+def dead(why)
+  puts "#{why} Good job!"
+  Process.exit(0)
+end
+
+def start()
+  puts "You are in a dark room."
+  puts "There is a door to your left and right."
+  puts "Which one do you take?"
+
+  prompt; next_move = gets.chomp
+
+  if next_move == "left"
+    bear_room()
+  elsif next_move == "right"
+    cthulu_room()
+  else
+    dead("You stumble around the room until you starve.")
+  end
+end
+
+start()