{"author_url":"https://blog.hatena.ne.jp/kamekoopa/","categories":["Haskell","\u52c9\u5f37\u4f1a"],"height":"190","description":"\u4ee3\u6570\u7684\u30c7\u30fc\u30bf\u578b\u3068\u570f\u8ad6\u306e\u5c0e\u5165\u306e\u5c0e\u5165\u3002 \u4ee3\u6570\u7684\u30c7\u30fc\u30bf\u578b \u4ee3\u6570\u7684\u30c7\u30fc\u30bf\u578bX\u3068\u306f X <- A + BA + B\u3063\u3066\u3044\u3046\u306e\u306f\u96c6\u5408A\u3068\u96c6\u5408\u306e\u91cd\u8907\u306e\u7121\u3044\u548c\u3068\u306e\u4e8b\u3002 \u250c\u2500\u2500 X\u2500\u2500\u2500\u2510 \u2502\u250c\u2500\u2510\u250c\u2500\u2510\u2502 \u2502\u2502 A\u2502\u2502B \u2502\u2502 \u2502\u2514\u2500\u2518\u2514\u2500\u2518\u2502 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2518java\u3067\u8a00\u3046\u3068\u3053\u308d\u306eenum\u307f\u305f\u3044\u306a\u3082\u306e\u3002 \u305f\u3060\u3057Java\u3067\u306f enum X { // \u578b A, // \u5024 B; // \u5024 } \u3060\u3051\u3069\u3001\u4ee3\u6570\u7684\u30c7\u30fc\u30bf\u578b\u3067\u306f X <- A + B (\u578b) (\u578b) (\u578b)\u3068\u306e\u4e8b\u3002 -> (match, unapply Either\u3092\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u3067\u5206\u89e3\u3059\u308b\u7684\u306a\uff1f) X A + B <- (\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf eitherA \u2026","blog_title":"\u65b0\u3057\u3044\u30d5\u30a9\u30eb\u30c0 (3)","provider_name":"Hatena Blog","published":"2014-10-31 13:13:09","image_url":null,"title":"H\u3061\u3087\u3073\u3088\u307f\u52c9\u5f37\u30ce\u30fc\u30c8(8\u56de\u76ee)","provider_url":"https://hatena.blog","version":"1.0","type":"rich","author_name":"kamekoopa","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkamekoopa.hateblo.jp%2Fentry%2F20141031%2F1414728789\" title=\"H\u3061\u3087\u3073\u3088\u307f\u52c9\u5f37\u30ce\u30fc\u30c8(8\u56de\u76ee) - \u65b0\u3057\u3044\u30d5\u30a9\u30eb\u30c0 (3)\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://kamekoopa.hateblo.jp/entry/20141031/1414728789","width":"100%","blog_url":"https://kamekoopa.hateblo.jp/"}