Ruby on Rails

cat.rb

class Cat
  attr_reader :color, :breed
  attr_accessor :name

  def initialize(color, breed)
    @color = color
    @breed = breed
    @hungry = true
  end

  def feed(food)
    puts "Mmmm, " + food + "!"
    @hungry = false
  end

  def hungry?
    if @hungry
      puts "I'm hungry!"
    else
      puts "I'm full!"
    end
    @hungry
  end

    def speak
      puts "Meow!"
    end
  end


kitty = Cat.new("grey", "Persian")
puts "Let's inspect our new cat:"
puts kitty.inspect
puts "What class does our new cat belong to?"
puts kitty.class
puts "Is our new cat an object?"
puts kitty.is_a? (Object)
puts "What color is our cat?"
puts kitty.color
puts "Let's give our new cat a name"
kitty.name = "Betsy"
puts kitty.name
puts "Is our car hungry now?"
kitty.hungry?
puts "Let's feed our cat"
kitty.feed ("tuna")
puts "Is our cat hungry now?"
kitty.hungry?
puts "Our cat can make noise"
kitty.speak

fav_foods.rb

def fav_foods
  food_array = [] # instead of the brackets, you can also use Array.new to make a new empty array
  3.times do
    puts "Name a favorite food."
    food_array << gets.chomp
  end
  p food_array
  puts "Your favorite foods are #{food_array.join(", ")}."
  food_array.each { |food| puts "I like #{food} too!" }
end
fav_foods

pets.rb

class Pet
  attr_reader :color, :breed
  attr_accessor :name

  def initialize(color, breed)
    @color = color
    @breed = breed
    @hungry = true
  end

  def feed(food)
    puts "Mmmm, " + food + "!"
    @hungry = false
  end

  def hungry?
    if @hungry
      puts "I'm hungry!"
    else
      puts "I'm full!"
    end
    @hungry
  end
end

class Dog < Pet
  def speak
    puts "Woof!"
  end
end

class Cat < Pet
    def speak
      puts "Meow!"
    end
end


puppy = Dog.new("black", "Staffordshire Terrier")
puppy.speak
puts puppy.breed


kitty = Cat.new("grey", "Persian")
puts "Let's inspect our new cat:"
puts kitty.inspect
puts "What class does our new cat belong to?"
puts kitty.class
puts "Is our new cat an object?"
puts kitty.is_a? (Object)
puts "What color is our cat?"
puts kitty.color
puts "Let's give our new cat a name"
kitty.name = "Betsy"
puts kitty.name
puts "Is our car hungry now?"
kitty.hungry?
puts "Let's feed our cat"
kitty.feed ("tuna")
puts "Is our cat hungry now?"
kitty.hungry?
puts "Our cat can make noise"
kitty.speak

program.rb

def greeting
  puts "Please enter your name:"
  name = gets.chomp
  puts "Hello" + " " + name
end
greeting

program2.rb

if (5+5==10)
  puts"this is true"
else
  puts"this is false"
end

program3.rb

def choose
  puts "Do you like programming? Yes, no or may be please."
  choice = gets.chomp
  case choice.downcase
  when "yes"
    puts "That\'s great!"
  when "no"
    puts "That\'s too bad!"
  when "maybe"
    puts "Glad you are giving it a chance!"
  else
    puts "I have no idea what that means."
  end
end
choose

program4.rb

=begin
number=0
while (number<=10) do #while this condition is true, do..
  p "the number is now #{number}" #whatever is in this code block
  number +=1 #short for number = number +1
end+/ #don't forget your end
=end

(0..10).each do |n|
  p "the new numer is #{n}"
end