{"description":"Scala\u3092\u3084\u3063\u3066\u3044\u3066\u3001val x: Option[String] = None\u3092\"\"\u306b\u5199\u3057\u305f\u3044\u3053\u3068\u304c100\u4e07\u56de\u304f\u3089\u3044\u3042\u308b\u3002\u3057\u304b\u3057x.getOrElse(\"\")\u3068\u66f8\u304f\u306e\u306f\u7d0d\u5f97\u3044\u304b\u306a\u3044\u3001\u3068\u3044\u3046\u72b6\u6cc1\u306b\u306a\u3063\u3066\u3044\u305f\u3002 \u306a\u305c\u304b\u3068\u3044\u3046\u3068\u3001String\u306f\u30e2\u30ce\u30a4\u30c9\u3060\u3057\u3001\u30e2\u30ce\u30a4\u30c9\u306b\u306f\u7a7a\u8981\u7d20empty\u304c\u3042\u308b\u306f\u305a\u3067\u3001Option[A : Monoid]\u307f\u305f\u3044\u306a\u578b\u304c\u3042\u3063\u305f\u3089\u3001None\u306e\u3068\u304d\u306fempty\u306b\u5199\u3057\u305f\u3044\u3001\u3068\u3044\u3046\u306e\u306f\u7d50\u69cb\u81ea\u660e\u306b\u3088\u304f\u3042\u308b\u30b7\u30c1\u30e5\u30a8\u30fc\u30b7\u30e7\u30f3\u306a\u306e\u3067\u306f\u306a\u3044\u304b\u3068\u601d\u3063\u3066\u60b6\u3005\u3068\u3057\u3066\u3044\u305f\u3002\u3069\u3053\u304b\u306b\u65e2\u306b\u5b9f\u88c5\u304c\u3042\u308b\u306f\u305a\u3060\u3051\u308c\u3069\u3001\u3069\u3053\u306b\u3042\u308b\u306e\u304b\u308f\u304b\u3089\u306a\u3044!!! Option[String]\u3060\u3063\u305f\u3089\"\"\u306b\u5199\u305b\u3070\u3088\u3044 Op\u2026","provider_name":"Hatena Blog","height":"190","blog_title":"Lambda\u30ab\u30af\u30c6\u30eb","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.3qe.us%2Fentry%2F2022%2F05%2F17%2F153645\" title=\"None\u306f\u7a7a\u6587\u5b57\u306b\u5199\u3057\u305f\u3044\u3001\u305d\u3093\u306a\u541b\u306e\u305f\u3081\u306bcombineAll\u304c\u3042\u308b - Lambda\u30ab\u30af\u30c6\u30eb\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://blog.3qe.us/","version":"1.0","author_name":"Windymelt","type":"rich","published":"2022-05-17 15:36:45","url":"https://blog.3qe.us/entry/2022/05/17/153645","author_url":"https://blog.hatena.ne.jp/Windymelt/","width":"100%","categories":["\u6280\u8853","scala","cats"],"image_url":null,"title":"None\u306f\u7a7a\u6587\u5b57\u306b\u5199\u3057\u305f\u3044\u3001\u305d\u3093\u306a\u541b\u306e\u305f\u3081\u306bcombineAll\u304c\u3042\u308b"}