Neil's Idea

	class X
	attr_accessor :foo
	def [](key)
	__send__ key.to_sym if [:foo].include? key.to_sym
	end
	def []=(key, value)
	__send__ :"#{key}=", value if [:foo].include? key.to_sym
	end
	end
	x = X.new
	x[:foo] = 123
	puts x[:foo]
	x.foo = "works"
	p x.foo

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