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您可能对以下实现感兴趣bring_back_snowmanhttps ://github.com/steveklabnik/bring_back_snowman

具体来说,https://github.com/steveklabnik/bring_back_snowman/blob/master/lib/bring_back_snowman.rb#L15-L28

于 2013-04-16T21:53:19.967 回答