{"version":"1.0","url":"https://blog.3qe.us/entry/2025/03/30/090800","height":"190","image_url":null,"description":"Cats Effect \u3092\u3044\u3058\u3063\u3066\u3044\u305f\u3089\u3001foreach_\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u3092\u898b\u4ed8\u3051\u305f\u3002\u3053\u308c\u306fCats Effect\u72ec\u81ea\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u306a\u304f\u3066\u3001Cats\u306b\u7528\u610f\u3055\u308c\u3066\u3044\u308b\u3002 \u3053\u308c\u306f\u307b\u307ctraverse\u3068\u540c\u3058\u3060: import cats.effect.IO import cats.syntax.all.* def message(who: String): IO[String] = IO.pure(s\"Hi, $who\") def greet(m: String) = IO.println(m) val messages = Vector( message(\"windymelt\"), message(\"\u2026","blog_title":"Lambda\u30ab\u30af\u30c6\u30eb","categories":["scala","cats","cats effect"],"width":"100%","author_url":"https://blog.hatena.ne.jp/Windymelt/","blog_url":"https://blog.3qe.us/","title":"Cats\u306etraverse_\u306f\u8981\u3059\u308b\u306b\u9ad8\u30ab\u30a4\u30f3\u30c9\u306eforeach","published":"2025-03-30 09:08:00","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.3qe.us%2Fentry%2F2025%2F03%2F30%2F090800\" title=\"Cats\u306etraverse_\u306f\u8981\u3059\u308b\u306b\u9ad8\u30ab\u30a4\u30f3\u30c9\u306eforeach - 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>","provider_name":"Hatena Blog","author_name":"Windymelt","type":"rich"}