{"provider_url":"https://hatena.blog","type":"rich","blog_url":"https://inamori.hateblo.jp/","categories":["F#"],"version":"1.0","title":"Project Euler 8","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finamori.hateblo.jp%2Fentry%2F20100416%2Fp1\" title=\"Project Euler 8 - inamori\u2019s diary\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_name":"inamori","blog_title":"inamori\u2019s diary","description":"http://projecteuler.net/index.php?section=problems&id=8 \u6587\u5b57\u5217\u306f\u6587\u5b57\u306e\u914d\u5217\u3089\u3057\u3044\u3067\u3059\u3002\u500b\u3005\u306e\u6587\u5b57\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306b\u306f\u3001 let s = \"123\" printfn \"%c\" s.[0] // 1 \u3053\u308c\u3092\u6570\u306b\u3059\u308b\u306b\u306f\u3001int\u306b\u5909\u63db\u3059\u308c\u3070\u30b3\u30fc\u30c9\u306b\u306a\u308b\u306e\u3067\u305d\u308c\u3092\u7528\u3044\u308c\u3070\u3088\u3044\u3067\u3057\u3087\u3046\u3002 printfn \"%d\" (int s.[0] - int '0') // 1 \u524d\u554f\u3068\u540c\u69d8\u306b\u3053\u3046\u3044\u3046\u5834\u5408\u306bList\u3068Sequence\u3068\u3069\u3061\u3089\u3092\u7528\u3044\u308b\u3079\u304d\u304b\u304c\u308f\u304b\u308a\u307e\u305b\u3093\u3002List\u306b\u306ftake\u304c\u306a\u3044\u3057\u3001Sequence\u306b\u306fTail\u304c\u898b\u5f53\u305f\u308a\u307e\u305b\u3093\u3002\u4ed5\u65b9\u304c\u306a\u3044\u306e\u3067Lis\u2026","author_url":"https://blog.hatena.ne.jp/inamori/","height":"190","url":"https://inamori.hateblo.jp/entry/20100416/p1","image_url":null,"published":"2010-04-16 00:00:00","width":"100%","provider_name":"Hatena Blog"}