Hash lvalue slice monkey patch

gistfile1.rb

# lvalue slicing of Hashes
# hash = {foo: 1, bar: 2, baz: 3}
# hash[:foo, :bar] == [1, 2]
#
# hash[:foo, 3] = 6,7
# hash == {foo: 6, bar: 2, baz: 3, 3 => 7}
#
# strange enough, I haven't noticed any slowdown on rails startup.
class Hash
  alias oldbracket []
  def [](*values)
    if values.size == 1
      oldbracket(*values)
    else
      values_at(*values)
    end
  end

  alias oldbracketassign []=
  def []=(*args)
    if args.size == 2
      oldbracketassign(*args)
    else
      vals = args.pop
      args.zip(vals) do |key, val|
        oldbracketassign key, val
      end
    end
  end
end