tic tac toe

week1/homework/questions.txt

@@ -3,13 +3,23 @@ Chapter 3 Classes, Objects, and Variables
 p.86-90 Strings (Strings section in Chapter 6 Standard Types)
 
 1. What is an object?
+A instance or 'thing' of any type that is defined in memory within the context of the program
 
 2. What is a variable?
+A name that is given to a specific object
 
 3. What is the difference between an object and a class?
+An object is a specific instance of a class.  A class may have specific attributes that are themselves objects of another class.
 
 4. What is a String?
+A string is one or more characters.  A string object is an object that is a member of the string class.
 
 5. What are three messages that I can send to a string object? Hint: think methods
+length (return length of string)
+index (return first character location of a hit on a substring or regex pattern)
+encode (convert character encoding)
 
 6. What are two ways of defining a String literal? Bonus: What is the difference between the two?
+single (') and double (") quotes...
+single quotes don't interpolate variables and only require escaping the single-quote(') or backslash(\)
+double quotes allow variable interpolation and have many more 'special' characters that either require escaping or that can be created through the use of backslash(\)

week1/homework/strings_and_rspec_spec.rb

@@ -12,14 +12,15 @@
 		before(:all) do
 			@my_string = "Renée is a fun teacher. Ruby is a really cool programming language"
 		end
-		it "should be able to count the charaters"
+		it "should be able to count the charaters" do
+      @my_string.size.should eq 66
+    end
 		it "should be able to split on the . charater" do
-			pending
-			result = #do something with @my_string here
+			result = @my_string.split('.')
 			result.should have(2).items	
 		end
 		it "should be able to give the encoding of the string" do
-			pending 'helpful hint: should eq (Encoding.find("UTF-8"))'
+      @my_string.encoding.should eq Encoding.find("UTF-8")
 		end
 	end
 end

week2/homework/questions.txt

@@ -3,11 +3,24 @@ Containers, Blocks, and Iterators
 Sharing Functionality: Inheritance, Modules, and Mixins
 
 1. What is the difference between a Hash and an Array?
+An array is a collection of objects that are indexed by their order in memory and will therefore be returned in a predictable order
+A hash is a collection of objects indexed by an arbitrary hash key. Items may be returned in an unpredictable order
 
 2. When would you use an Array over a Hash and vice versa?
+An array is ideal for creating a push/pop stack and anytime an integer indexed key makes logical sense.
+Arrays are also generally more memory efficient than hashes, so anytime memory limitations are a concern.
+Otherwise, hashes are generally more flexible and lookup speeds are generally faster.
 
 3. What is a module? Enumerable is a built in Ruby module, what is it?
+Modules act as libraries and are a way to create methods/functions that will be used in multiple classes.
+
 
 4. Can you inherit more than one thing in Ruby? How could you get around this problem?
+No, Ruby does not have multiple inheritance.
+To get around the problem 'include' can be used to mixin multiple modules into a single class.
 
 5. What is the difference between a Module and a Class?
+Generally, a module is about methods and a class is about objects...
+Objects can be instances of a class, modules cannot be instantiated.
+Class can inherit from other classes but cannot be 'included' in a class.
+Modules have no pure inheritance, but can be 'included' in other classes and modules (using include)

week2/homework/simon_says.rb

@@ -0,0 +1,21 @@
+module SimonSays
+    def echo(input)
+      input
+    end
+
+    def shout(input)
+      input.upcase
+    end
+
+    def repeat(input, times=2)
+      ((input + ' ') * times).chop
+    end
+
+    def start_of_word(input,last)
+      input[0...last]
+    end
+
+    def first_word(input)
+      input.split(' ')[0]
+    end
+end

week3/homework/calculator.rb

@@ -0,0 +1,19 @@
+class Calculator
+
+  def sum (input)
+    input.inject(0,:+)
+  end
+
+  def multiply (*input)
+    input.flatten.inject(:*)
+  end
+
+  def pow(base,exp)
+    (1...exp).to_a.inject(base){|result| result*=base}
+  end
+
+  def fac(n)
+    (1..n).to_a.inject(1){|result,i| result*=i}
+  end
+
+end

week3/homework/questions.txt

@@ -5,11 +5,25 @@ Please Read:
  - Chapter 22 The Ruby Language: basic types (symbols), variables and constants
 
 1. What is a symbol?
+A symbol is a unique, fixed static name
 
 2. What is the difference between a symbol and a string?
+A string is an object and the character contents of that object can be changed at any time.
+Multiple string object instances can contain the same string value.
+A symbol is a collection of characters (like a string), but the name and value of a symbol are the same, they cannot be changed, and are always unique.
+Every reference to a specific symbol points to the same memory object while individual references to a specific string value point to individual in-memory string object instances.
 
 3. What is a block and how do I call a block?
+A block is an unnamed function or section of code which can be called with the yield function.
 
 4. How do I pass a block to a method? What is the method signature?
+A block is delineated by a pair of curly-braces {} or by do/end keywords.
+A block is passed to a method by placing the block immediately after the method call. All methods receive blocks, which can be called with yield.
+A method signature is part of the method declaration. It is the combination of the method name and the parameter list.
+Blocks can be defined in the method signature by using the ampersand & prefix and then accessed within the method by using the 'call' method.
+Performance is generally better using 'yield' vs 'call' so method signature block declaration is generally only used when necessary.
 
 5. Where would you use regular expressions?
+Regexes are used to match (and/or replace/extract) potentially complex pattern conditions within text.
+Regexes are generally less efficient than simpler equality matches, and should thus be reserved for situations where they are required.
+

week4/homework/questions.txt

@@ -3,7 +3,18 @@ Chapter 10 Basic Input and Output
 The Rake Gem: http://rake.rubyforge.org/
 
 1. How does Ruby read files?
+Files are read using the Ruby built-in File class which is a subclass of the IO class
+
 2. How would you output "Hello World!" to a file called my_output.txt?
+File.open('my_output.txt', 'w+') {|fileout| fileout.puts "Hello World!"}
+
 3. What is the Directory class and what is it used for?
+Objects of class Dir are directory streams representing directories in the underlying file system. They provide a variety of ways to list directories and their contents.
+
 4. What is an IO object?
+An IO object is any instance of an IO class. Since the File class is a subclass of IO, all File objects are IO objects.
+
 5. What is rake and what is it used for? What is a rake task?
+rake = ruby make
+It is a build tool to manage dependencies. They are used wherever make files would normally be used but use ruby syntax instead of make syntax
+A rake task is a logical group of ruby statements.  Tasks can have prerequisites and depend on other tasks.  In this manner, tasks can be used to group other tasks into sequences.

week7/homework/features/step_definitions/tic-tac-toe.rb

@@ -0,0 +1,108 @@
+class TicTacToe
+  attr_accessor :board, :player, :player_symbol, :computer_symbol
+
+  @WINNING_COMBOS=[[:A1, :A2, :A3], [:B1, :B2, :B3], [:C1, :C2, :C3], [:A1, :B1, :C1], [:A2, :B2, :C2], [:A3, :B3, :C3], [:A1, :B2, :C3], [:A3, :B2, :C1]]
+
+  def initialize (player=[:player, :computer].sample, symbol=[:X,:O].sample)
+    @player = ''
+    @board = {
+        :A1 => :' ', :A2 => :' ', :A3 => :' ',
+        :B1 => :' ', :B2 => :' ', :B3 => :' ',
+        :C1 => :' ', :C2 => :' ', :C3 => :' '
+    }
+    @winner = nil
+    @next_turn = player
+    if symbol == :X
+      other_symbol=:O
+    else
+      other symbol = :X
+    end
+    if player == :player
+      @player_symbol = symbol
+      @computer_symbol = other_symbol
+    else
+      @player_symbol = other_symbol
+      @computer_symbol = symbol
+    end
+  end
+
+  def current_player
+    if @next_turn == :computer
+      return 'Computer'
+    else
+      @player
+    end
+  end
+
+  def welcome_player
+    puts "Welcome #{@player}"
+  end
+
+  def indicate_palyer_turn
+    puts "#{@player}'s Move:"
+  end
+
+  def open_spots
+    @board.select {|k,v| v==:' '}.keys
+  end
+
+  def spots_open?
+    if self.open_spots.length > 0
+      true
+    else
+      false
+    end
+  end
+
+  def get_player_move
+    player_move = gets.chomp
+    until self.open_spots.include?(player_move)
+      puts "That spot is taken."
+      self.indicate_palyer_turn
+      player_move=gets.chomp
+    end
+    @board[player_move => @player_symbol]
+    @next_turn = :computer
+  end
+
+  def computer_move
+    @board[self.open_spots.sample => @computer_symbol]
+    @next_turn = :player
+  end
+
+  def determine_winner
+    @winner = :player if board.select {|k,v| v==@player_symbol}.keys.permutation(3).any? {|combo| @WINNING_COMBOS.include?(combo)}
+    @winner = :computer if board.select {|k,v| v==@player_symbol}.keys.permutation(3).any? {|combo| @WINNING_COMBOS.include?(combo)}
+  end
+
+  def player_won?
+    if @winner == :player
+      true
+    else false
+    end
+  end
+
+  def computer_won?
+    if @winner == :computer
+      true
+    else false
+    end
+  end
+
+  def over?
+    if self.spots_open? == false or @winner
+      true
+    else
+      false
+    end
+  end
+
+  def draw?
+    if @winner.nil? and self.over?
+      true
+    else
+      false
+    end
+  end
+
+end