Checking of object empty

is_empty.rb

class MyObject
  attr_accessor :foo, :bar
  
  def initialize(foo = nil, bar = nil)
    self.foo = foo
    self.bar = bar
  end
  
  def empty?
    foo.nil? || foo.empty?
  end
end

def object_by_reference(object)
  object if object.empty?
end

def new_object(object)
  MyObject.new if object.empty?
end

object = MyObject.new('', 'baz')

p object_by_reference(object) # will have `bar: 'baz'`
p new_object(object) # will have nothing