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インスタンス変数に外からアクセスするメソッドを簡単に書く

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その2
インスタンス変数に外からアクセスするメソッドを簡単に書く
attr_accessor インスタンス変数名のシンボル

class AClass
def initialize
  @foo
  @bar
end

attr_accesor :foo,:bar
end

instance = AClass.new
instance.foo = 1
instance.bar = "bar"
yahihi
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