{"author_name":"sirocco","categories":["Haskell"],"blog_url":"https://sirocco.hatenadiary.org/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsirocco.hatenadiary.org%2Fentry%2F20090517%2F1242509268\" title=\"\u221a2 \u3092\u8a08\u7b97\u3057\u3066\u307f\u305f - 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>","description":"\u30b6\u30ea\u30ac\u30cb\u304c\u898b\u3066\u3044\u305f...\u3002\u221a2\u3084\u5186\u5468\u7387\u03c0\u306e\u9a5a\u304d\u3092\u53c2\u8003\u306bHaskell \u306e\u7df4\u7fd2\u306b\u221a2 \u3092\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u305f\u3002 {- 1 2 5 12 29 70 169 408 985 ... \u6b21\u306e\u6570\u3092\u6c42\u3081\u308b\u306b\u306f\u3001\u4eca\u306e\u6570\u30922\u500d\u3057\u3066\u3001\u524d\u306e\u6570\u3092\u8db3\u3059\u3002 \u4f8b\uff1a5\u306e\u6b21\u306f... 5 \u00d7 2 + 2 = 12 \u221a2 \u2252 408 \u00f7 985 + 1 = 1.4142131979 -} sqr2 x = (head (tail (rseq x))) / (head (rseq x)) + 1 where rseq 1 = [1] rseq 2 = [2,1] rseq x = (((head (rseq (x-1))) * 2) \u2026","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","published":"2009-05-17 06:27:48","image_url":null,"version":"1.0","width":"100%","author_url":"https://blog.hatena.ne.jp/sirocco/","height":"190","blog_title":"sirocco \u306e\u66f8\u3044\u3066\u3082\u3059\u3050\u306b\u5fd8\u308c\u308b\u30e1\u30e2","title":"\u221a2 \u3092\u8a08\u7b97\u3057\u3066\u307f\u305f","url":"https://sirocco.hatenadiary.org/entry/20090517/1242509268","type":"rich"}