{"blog_title":"ryugate\u306e\u65e5\u8a18","provider_name":"Hatena Blog","author_name":"ryugate","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fryugate.hatenadiary.org%2Fentry%2F20080527%2Fp2\" title=\" flatMap - ryugate\u306e\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>","type":"rich","provider_url":"https://hatena.blog","categories":["Scala"],"height":"190","author_url":"https://blog.hatena.ne.jp/ryugate/","title":" flatMap","published":"2008-05-27 00:00:01","image_url":null,"url":"https://ryugate.hatenadiary.org/entry/20080527/p2","description":"\uff08\u518d\u3073\u3001mizushima\u3055\u3093\uff20Lingr\u3088\u308a\uff09flatMap\u3068\u306f \uff08\u8a08\u7b97\u306e\uff09\u300c\u7d50\u679c\u300c\u3067\u3042\u308b\u300d\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u9023\u7d50\u3057\u305f\u65b0\u3057\u3044\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u8fd4\u300d\u3059map \u3067\u3042\u308b\u3002\u4f8b\u3048\u3070\u3001 List(1, 2, 3).map{i => List(i, i + 1)} \u306e\u7d50\u679c\u306f List(List(1, 2), List(2, 3), List(3, 4)) \u306b\u306a\u308a\u307e\u3059\u304c List(1, 2, 3).flatMap{i => List(i, i + 1)} \u306e\u7d50\u679c\u306f List(1, 2, 2, 3, 3, 4) \u306b\u3001\u306a\u308a\u307e\u3059\u3002\u30b7\u30b0\u30cd\u30c1\u30e3\u3067\u793a\u3059\u3068 map [B](f : (A) => B) : Iterable[B] \u2026","blog_url":"https://ryugate.hatenadiary.org/","version":"1.0","width":"100%"}