Opening An Account

#Codecademy sample solution

class Account
    attr_reader :name
    attr_reader :balance

def initialize(name, balance=100)
@name = name
@balance = balance
end

private

def pin
@pin = 1234
end

def pin_error
return "Access denied: incorrect PIN."
end

public

def display_balance(pin_number)
if pin_number === pin
puts "Balance: $#{@balance}."
else
puts pin_error
end
end

def withdraw(pin_number, amount)
if pin_number === pin
@balance -= amount
puts "Withdrew #{amount}. New balance: $#{@balance}."
else
puts pin_error
end
end
end

#I wanna be a billionaire, so frekin' bad
checking_account = Account.new("Jim", 1_000_000_000)

Making a Withdrawal

#Codecademy sample solution

class Account
    attr_reader :name
    attr_reader :balance

def initialize(name, balance=100)
@name = name
@balance = balance
end

private

def pin
@pin = 1234
end

def pin_error
return "Access denied: incorrect PIN."
end

public

def display_balance(pin_number)
if pin_number === pin
puts "Balance: $#{@balance}."
else
puts pin_error
end
end

def withdraw(pin_number, amount)
if pin_number === pin
@balance -= amount
puts "Withdrew #{amount}. New balance: $#{@balance}."
else
puts pin_error
end
end
end

Displaying the Balance

#Codecademy sample solution

class Account
    attr_reader :name
    attr_reader :balance

def initialize(name, balance=100)
@name = name
@balance = balance
end

private

def pin
@pin = 1234
end

def pin_error
return "Access denied: incorrect PIN."
end

public

def display_balance(pin_number)
if pin_number === pin
puts "Balance: $#{@balance}."
else
puts pin_error
end
end
end

Private Affairs

#Codecademy sample solution

class Account
    attr_reader :name
    attr_reader :balance

def initialize(name, balance=100)
@name = name
@balance = balance
end

private

def pin
@pin = 1234
end

def pin_error
return "Access denied: incorrect PIN."
end
end

Codecademy: Creating the Account Class

#sample solution

class Account
    attr_reader :name
    attr_reader :balance
def initialize(name, balance=100)
@name = name
@balance = balance
end
end

Codecademy Sample Solution: Mixin For the Win

module Languages
  FAVE = "Ruby"  # This is what you typed before, right? :D
end

class Master
  include Languages
  def initialize; end
  def victory
    puts FAVE
  end
end

total = Master.new
total.victory

Codecademy Sample Solution: Module Magic

# Create your module below!
module Languages
  FAVE = "Javascript"
end

Codecademy Sample Solution: Private Affairs

class Application
  attr_accessor :status
  def initialize; end
  # Add your method here!
  public
  def print_status
  puts "All systems go!"
  end
 
  private
  def password
    return 12345
  end
end

Codecademy Sample Solution: A Matter of Public Knowledge

class Application
  attr_accessor :status
  def initialize; end
  # Add your method here!
  public
  def print_status
  puts "All systems go!"
  end
end

Codecademy Sample Solution: Imitating Multiple Inheritance

# Create your module here!
module MartialArts
def swordsman
puts "I'm a swordsman."
end
end

class Ninja
  include MartialArts
  def initialize(clan)
    @clan = clan
  end
end

class Samurai
  include MartialArts
  def initialize(shogun)
    @shogun = shogun
  end
end

#test
Leo = Ninja.new("Tutle")
Leo.swordsman

Himura = Samurai.new("Hogan")
Himura.swordsman

Codecademy Sample Solution: Feeling Included

class Angle
  include Math
  attr_accessor :radians
 
  def initialize(radians)
    @radians = radians
  end
 
  def cosine
    cos(@radians)
  end
end

acute = Angle.new(1)
acute.cosine

Codecademy Sample Solution: A Few Requirements

require 'date'

puts Date.today

Codecademy Sample Solution: Resolve to Keep Learning!

# Write your code below!
puts Math::PI

Codecademy Sample Solution: Module Syntax

module MyLibrary
FAVE_BOOK = "Bible"
end

Codecademy Sample Solution: attr_accessor

class Person
  attr_reader :name
  attr_accessor :job
 
  def initialize(name, job)
    @name = name
    @job = job
  end
end

client = Person.new("Jim", "programmer")
puts "#{client.name} is a #{client.job}"
client.job = "dentist"
puts "#{client.name} is a #{client.job}"

Codecademy Sample Solution: attr_reader, attr_writer

class Person
  attr_reader :name
  attr_reader :job
  attr_writer :job
  def initialize(name, job)
    @name = name
    @job = job
  end
end

client = Person.new("Jim", "programmer")
puts "#{client.name} is a #{client.job}"
client.job = "dentist"
puts "#{client.name} is a #{client.job}"

Codecademy Sample Solution: Private! Keep Out!

class Dog
def initialize(name, breed)
@name = name
@breed = breed
end

public
def bark
puts "Woof!"
end

private
def id
@id_number = 12345
end
end

Codecademy Sample Solution: Going Public

class Dog
def initialize(name, breed)
@name = name
@breed = breed
end

public
def bark
puts "Woof!"
end
end

#test
contestant1 = Dog.new("Snoopy", "Beagle")
contestant1.bark

Codecademy Sample Solution: Quick Review: Building a Class

class Dog
def initialize(name, breed)
@name = name
@breed = breed
end
end

Codecademy Sample Solution: Instantiation Nation

class Computer
@@users = {}

def Computer.get_users
return @@users
end

def initialize(username, password)
@username = username
@password = password
@files = {}
@@users[username] = password
end

def create(filename)
@filename = filename
@time = Time.now
@files[filename] = @time
puts "A new file was created: #{@filename} #{@username} #{@time}"
end
end

my_computer = Computer.new("Jim", test)