Ruby/Class/object Creation

class Object
  private
  def set_instance_variables(binding, *variables)
    variables.each do |var|
      eval("@#{var} = #{var}", binding)
    end
    #instance_variable_set("@#{var}", var)
  end
end
class RGBColor
  def initialize(red=0, green=0, blue=0)
    set_instance_variables(binding, *local_variables)
  end
end
RGBColor.new(10, 200, 300)
# => #<RGBColor:0xb7c22fc8 @red=10, @blue=300, @green=200>

class Object
  def in(other)
    other.include? self
  end
end
x = [1, 2, 3]
if 2.in x
  puts "yes"     # Prints "yes"
else
  puts "no"
end

# You use the new method to create an object in Ruby.
class Animal
  def initialize
    @color = "red"
  end
  def get_color
    return @color
  end
end
animal = Animal.new