{"categories":["Haskell"],"author_name":"sirocco","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsirocco.hatenadiary.org%2Fentry%2F20100706%2F1278366854\" title=\"\u300cReal World Haskell\u300d\u8aad\u66f8\u30e1\u30e2 7.\u5165\u51fa\u529b 7.1 Haskell\u306b\u304a\u3051\u308b\u53e4\u5178\u7684\u5165\u51fa\u529b - 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>","url":"https://sirocco.hatenadiary.org/entry/20100706/1278366854","provider_name":"Hatena Blog","description":"return \u306f\u7d14\u7c8b\u306a\u5024\u3092 IO \u30a2\u30af\u30b7\u30e7\u30f3\u3067\u304f\u308b\u3093\u3067\u8fd4\u3059\u3002 Prelude> :t \"Hello,world!\" \"Hello,world!\" :: [Char] Prelude> :t return \"Hello,world!\" return \"Hello,world!\" :: (Monad m) => m [Char] Prelude> h <- return \"Hello,world!\" Prelude> :t h h :: [Char] Prelude> h \"Hello,world!\" \" Prelude> ret <- putStrLn \"Hello,world!\" Hello,\u2026","image_url":null,"type":"rich","provider_url":"https://hatena.blog","blog_title":"sirocco \u306e\u66f8\u3044\u3066\u3082\u3059\u3050\u306b\u5fd8\u308c\u308b\u30e1\u30e2","height":"190","width":"100%","title":"\u300cReal World Haskell\u300d\u8aad\u66f8\u30e1\u30e2 7.\u5165\u51fa\u529b 7.1 Haskell\u306b\u304a\u3051\u308b\u53e4\u5178\u7684\u5165\u51fa\u529b","published":"2010-07-06 06:54:14","author_url":"https://blog.hatena.ne.jp/sirocco/","blog_url":"https://sirocco.hatenadiary.org/","version":"1.0"}