class Hash
  def ref_with_destructuring(*args)
    ret = args.map { |a| ref_without_destructuring(a) }
    ret.size == 1 ? ret.first : ret
  end
 
  alias_method :ref_without_destructuring, :[]
  alias_method :[], :ref_with_destructuring
end
 
# a = {:one => 1, :two => 2, :three => 3}
# b, c = a[:one, :three]
# puts b  # => 1
# puts c  # => 3