{"author_name":"sirocco","author_url":"https://blog.hatena.ne.jp/sirocco/","version":"1.0","height":"190","type":"rich","image_url":null,"blog_url":"https://sirocco.hatenadiary.org/","description":"Write Yourself a Scheme in 48 Hours/Creating IO Primitives http://jonathan.tang.name/files/scheme_in_48/code/listing10.hs Haskell\u306f\u3053\u308c\u304c\u6700\u5f8c\u306e\u30d5\u30a1\u30a4\u30eb\u3067\u3059\u3002 -- forall \u3067\u30a8\u30e9\u30fc\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u5148\u982d\u306b\u8a18\u5165\u3057\u3066\u304a\u304d\u307e\u3059\u3002 {-# LANGUAGE ExistentialQuantification #-} -- \u4fdd\u5b58\u3055\u308c\u305f\u5909\u6570\u3092\u8868\u793a\u3059\u308b\u305f\u3081\u306e\u95a2\u6570 showEnv :: IORef [(String, IORef LispVal)] -> IO [(String\u2026","provider_url":"https://hatena.blog","title":"\u300cWrite Yourself a Scheme in 48 Hours\u300d \u3092\u5199\u7d4c\u3057\u3066\u307f\u308b(15) : \u57fa\u672c IO \u306e\u4f5c\u6210\u3002","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsirocco.hatenadiary.org%2Fentry%2F20111105%2F1320467482\" title=\"\u300cWrite Yourself a Scheme in 48 Hours\u300d \u3092\u5199\u7d4c\u3057\u3066\u307f\u308b(15) : \u57fa\u672c IO \u306e\u4f5c\u6210\u3002 - sirocco \u306e\u66f8\u3044\u3066\u3082\u3059\u3050\u306b\u5fd8\u308c\u308b\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>","categories":[],"url":"https://sirocco.hatenadiary.org/entry/20111105/1320467482","published":"2011-11-05 13:31:22","provider_name":"Hatena Blog","blog_title":"sirocco \u306e\u66f8\u3044\u3066\u3082\u3059\u3050\u306b\u5fd8\u308c\u308b\u30e1\u30e2"}