variables are parameters

rb1

#doggy_pal.rb
#I usually set up 2 Dog instances 

class Dog 
	#instance variables
	attr_accessor :name, :breed

#instance method
def gets_along_with(buddy)
	puts "#{@name} is friendly with #{buddy.name}."
	puts "#{@name} is a #{@breed}.\n#{buddy.name} is a #{breed}."
	#Notice it works without instance variable set equal to parameters.
end
end

=Begin
Alpha = Dog.new
Alpha.name = "Adam"
Alpha.breed = "Alpha"

Collie = Dog.new
Collie.name = "Chris"
Collie.breed = "Collie"

Alpha.gets_along_with(Collie)
=End

rb2

Raw  doggy_pal2.rb
#doggy_pal2.rb
#I usually set up 1 instance

class Animal

	attr_accessor :name, :what_animal, :breed

	def report(personality)
		puts "#{@name} is a #{@what_animal}."
		puts "#{@name} has a #{personality.breed} personality."
		@breed = personality   #so why am I setting my variable = parameter?
	                         #My thesis is that I do this when I deal with only one instance...
	                         #am I right?
	end
end


=Begin
Dog = Animal.new
Dog.name = "Adam"
Dog.what_animal = "Dog"
Dog.breed = "Collie"

Dog.report("Collie")  
this input works

If I were to set up 2 instances
Dog = Animal.new
Dog.name = "Adam"
Dog.what_animal = "Dog"
Dog.breed = "Collie"

Cat = Animal.new
Cat.name = "Rocky"
Cat.what_animal = "Cat"
Cat.breed = "tabby"

Dog.report(Cat)
this input does not work

=End