{"title":"Scala3\u5b66\u7fd2\u30e1\u30e2: Scala3\u306b\u304a\u3051\u308bType Lambda","provider_name":"Hatena Blog","width":"100%","height":"190","blog_title":"Magnolia Tech","provider_url":"https://hatena.blog","type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.magnolia.tech%2Fentry%2F2021%2F08%2F10%2F011549\" title=\"Scala3\u5b66\u7fd2\u30e1\u30e2: Scala3\u306b\u304a\u3051\u308bType Lambda - Magnolia Tech\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":[],"url":"https://blog.magnolia.tech/entry/2021/08/10/011549","image_url":null,"author_url":"https://blog.hatena.ne.jp/magnoliak/","version":"1.0","blog_url":"https://blog.magnolia.tech/","author_name":"magnoliak","published":"2021-08-10 01:15:49","description":"Scala2\u306b\u304a\u3051\u308bType Lambda\u306b\u3064\u3044\u3066\u306f\u3001\u4e0b\u8a18\u306e\u30d6\u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u304c\u8a73\u3057\u3044\u3002 underscore.io \u6700\u521d\u306b\u3001\u578b\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u6570\u3092\u4e00\u3064\u3068\u3057\u3066\u5b9a\u7fa9\u3057\u3066\u3044\u308b\u3068\u3001\u578b\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u4e8c\u3064\u53d6\u308b\u7269\u3092\u6e21\u305b\u306a\u3044\u3002 scala> trait Functor[F[_]] trait Functor scala> type F1 = Functor[Option] type F1 scala> type F2 = Functor[List] type F2 scala> type F3 = Functor[Map] ^ error: Map takes 2 type parameters, expected:\u2026"}