{"author_name":"tmtms","height":"190","published":"2018-08-17 01:22:17","blog_title":"tmtms \u306e\u30e1\u30e2","provider_url":"https://hatena.blog","image_url":null,"blog_url":"https://blog.tmtms.net/","categories":["Ruby"],"title":"\u9006\u30dd\u30fc\u30e9\u30f3\u30c9\u8a18\u6cd5","url":"https://blog.tmtms.net/entry/201808/reverse-polish","author_url":"https://blog.hatena.ne.jp/tmtms/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.tmtms.net%2Fentry%2F201808%2Freverse-polish\" title=\"\u9006\u30dd\u30fc\u30e9\u30f3\u30c9\u8a18\u6cd5 - tmtms \u306e\u30e1\u30e2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"\u3075\u3068\u3001\u9006\u30dd\u30fc\u30e9\u30f3\u30c9\u8a18\u6cd5\u3063\u3066\u306e\u304c\u3042\u3063\u305f\u306a\u30fc\u3068\u601d\u3044\u51fa\u3057\u305f\u3093\u3060\u3051\u3069\u3001\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5168\u7136\u5fd8\u308c\u3066\u305f\u306e\u3067\u30cd\u30c3\u30c8\u3067\u691c\u7d22\u3057\u3066\u3001Ruby\u3067\u5b9f\u88c5\u3057\u3066\u307f\u305f\u3002 \u53c2\u8003\u306b\u3057\u305f\u30da\u30fc\u30b8\u2192 \u6570\u5f0f\u3092\u9006\u30dd\u30fc\u30e9\u30f3\u30c9\u6cd5\u306b\u5909\u63db\u3059\u308b\u305f\u3081\u306e\u4e8b\u67c4 class ReversePolish # \u6f14\u7b97\u5b50\u306e\u512a\u5148\u5ea6 OP = { '+' => 1, '-' => 1, '*' => 2, '/' => 2, } # @param expr [Array<String>] def initialize(expr) @expr = expr.dup @list = [] end # \u9006\u30dd\u30fc\u30e9\u30f3\u30c9\u8a18\u6cd5\u306b\u5909\u63db # @return [Array] def par\u2026","provider_name":"Hatena Blog","width":"100%","type":"rich","version":"1.0"}