{"width":"100%","type":"rich","height":"190","version":"1.0","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","author_name":"gothedistance","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Faroundthedistance.hatenadiary.jp%2Fentry%2F2015%2F06%2F19%2F165441\" title=\"Scala\u306e\u7dcf\u6570\u3092\u53d6\u5f97\u3059\u308b\u518d\u5e30\u547c\u3073\u51fa\u3057 - Life is Really Short, Have Your Life!!\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"Scala\u306e\u7dcf\u6570\u3092\u53d6\u5f97\u3059\u308b\u518d\u5e30\u547c\u3073\u51fa\u3057","categories":["Scala"],"url":"https://aroundthedistance.hatenadiary.jp/entry/2015/06/19/165441","image_url":null,"published":"2015-06-19 16:54:41","blog_url":"https://aroundthedistance.hatenadiary.jp/","blog_title":"Life is Really Short, Have Your Life!!","author_url":"https://blog.hatena.ne.jp/gothedistance/","description":"\u95a2\u6570\u578b\u8a00\u8a9e\u3067\u306f\u5ba3\u8a00\u7684\u306a\u95a2\u6570\u3092\u7528\u3044\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u308b\u306e\u3067\u30eb\u30fc\u30d7\u3067++\u307f\u305f\u3044\u306a\u624b\u7d9a\u304d\u3092\u305d\u306e\u307e\u307e\u66f8\u304f\u306e\u306f\u30ce\u30c3\u30c8\u30bd\u30fc\u30af\u30fc\u30eb\u3060\u3068\u3002\u6163\u308c\u305f\u3089\u518d\u5e30\u3067\u66f8\u304f\u307b\u3046\u304c\u76f4\u611f\u7684\u306b\u306a\u308b\u611f\u3001\u30c1\u30e7\u30c3\u30c8\u308f\u304b\u3063\u305f\u3002 def sumList(list:List[Int]): Int = { list match { case Nil => 0 case x::list => x + sumList(list) } } \u3053\u308c\u304c\u5168\u7136\u7406\u89e3\u3067\u304d\u306a\u304b\u3063\u305f\u3093\u3067\u3059\u3088\u3002\u7279\u306b\u3053\u3053\u304c\u3002 case x::list => x + sumList(list) \u3053\u306e\u518d\u5e30\u3092\u629c\u3051\u308b\u305f\u3081\u306b\u306fsumlist\u3067\u6307\u5b9a\u3055\u308c\u305f\u30ea\u30b9\u30c8\u304cNil\u306b\u306a\u308b\u3057\u304b\u306a\u3044\u3002\u3064\u307e\u308a\u3001\u518d\u5e30\u3067\u547c\u3073\u2026"}