Alternatives for a full_name method

user.rb

class User
  # Downsides - when first name is nil, you'll have a string like " LastName"
  def full_name
    "#{first_name} #{last_name}"
  end

  # Downsides - a bit harder to understand
  def full_name
    [first_name, last_name].compact.join(' ')
  end
end