{"image_url":null,"description":"\u30ea\u30b9\u30c8\u306econs, car, cdr\u3002 scala> 1 :: List(2, 3) // cons res0: List[Int] = List(1, 2, 3) scala> List(1, 2, 3).head // car res1: Int = 1 scala> List(1, 2, 3).tail // cdr res2: List[Int] = List(2, 3) \u3082\u3061\u308d\u3093\u3001\u914d\u5217\u306f\u4e0d\u53ef\u80fd\u3002 scala> 1 :: Array(2, 3) <console>:5: error: value :: is not a member of Array[Int] 1 :: Array(2\u2026","height":"190","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","published":"2008-03-12 00:00:00","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmorchin.hatenadiary.org%2Fentry%2F20080312%2Fp1\" title=\" cons, car, cdr - \u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","title":" cons, car, cdr","type":"rich","blog_url":"https://morchin.hatenadiary.org/","version":"1.0","author_url":"https://blog.hatena.ne.jp/morchin/","url":"https://morchin.hatenadiary.org/entry/20080312/p1","author_name":"morchin","blog_title":"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u65e5\u8a18","categories":["Scala"]}