splat.rb

class Animal
  attr_reader :name
  attr_reader :family
  
  def initialize(name, code)
    @name = name
    @family = family
  end
  
  def to_a
    [ name, family ]
  end
end

animals = []

def add_animal(name, family)
  animals << Animal.new(name, family)
end

add_animal('Cat', :Felidae)
add_animal(*[ 'Dog', :Canidae ])
add_animal(*Animal.new('Ape', :Hominidae))

animals
#=> [ Animal.new('Cat', :Felidae), Animal.new('Dog', :Canidae), Animal.new('Ape', :Hominidae) ]