{"description":"\u3053\u306e\u6295\u7a3f\u306f\u3001Haskell Advent Calendar 2019 \u306e4\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002ST\u30e2\u30ca\u30c9\u306e\u4ed5\u7d44\u307f\u306b\u3064\u3044\u3066\u66f8\u304d\u307e\u3057\u305f\u3002\u521d\u4e2d\u7d1a\u8005\u5411\u3051\u306e\u5185\u5bb9\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002 \u306f\u3058\u3081\u306b ST\u30e2\u30ca\u30c9\u3068\u306f ST\u30e2\u30ca\u30c9\u306e\u578b ST\u30e2\u30ca\u30c9\u306e\u4f7f\u7528\u4f8b ST\u30e2\u30ca\u30c9\u3067\u4f7f\u7528\u3055\u308c\u308b\u30c7\u30fc\u30bf\u578b\u3068\u5404\u7a2e\u95a2\u6570 Data.STRef newSTRef modifySTRef readSTRef runST \u5909\u66f4\u53ef\u80fd\u306a\u53c2\u7167\u3092\u5916\u3078\u6301\u3061\u51fa\u305d\u3046\u3068\u3059\u308b\u3068 \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304b\u3089\u8003\u5bdf\u3059\u308b forall\u306e\u63a2\u6c42 \u91cf\u5316\u5b50\u306f\u578b\u306b\u91cf\u7684\u306a\u610f\u5473\u3092\u6301\u305f\u305b\u308b \u91cf\u5316\u5b50\u3092\u95a2\u6570\u306e\u5185\u5074\u3067\u5b9a\u7fa9\u3059\u308b \u30e9\u30f3\u30afN\u591a\u76f8\u306e\u6982\u8981\u3068\u7279\u5fb4 \u30e9\u30f3\u30afN\u591a\u76f8\u306e\u6982\u8981 \u7279\u5fb4\u305d\u306e1: \u578b\u63a8\u8ad6\u306e\u5236\u9650\u3092\u7de9\u548c \u7279\u2026","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/shinharad/","width":"100%","title":"ST\u30e2\u30ca\u30c9\u306f\u306a\u305c\u5909\u66f4\u53ef\u80fd\u306a\u53c2\u7167\u3092\u5916\u3078\u6301\u3061\u51fa\u305b\u306a\u3044\u306e\u304b\u8abf\u3079\u3066\u307f\u305f","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fshinharad.hateblo.jp%2Fentry%2F2019%2F12%2F04%2F000050\" title=\"ST\u30e2\u30ca\u30c9\u306f\u306a\u305c\u5909\u66f4\u53ef\u80fd\u306a\u53c2\u7167\u3092\u5916\u3078\u6301\u3061\u51fa\u305b\u306a\u3044\u306e\u304b\u8abf\u3079\u3066\u307f\u305f - shinharad\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"published":"2019-12-04 00:00:50","height":"190","provider_url":"https://hatena.blog","type":"rich","blog_url":"https://shinharad.hateblo.jp/","blog_title":"shinharad\u306e\u65e5\u8a18","url":"https://shinharad.hateblo.jp/entry/2019/12/04/000050","version":"1.0","author_name":"shinharad","categories":["Haskell"]}