{"provider_name":"Hatena Blog","blog_title":"TAKOYAKING\u2019s blog","type":"rich","version":"1.0","provider_url":"https://hatena.blog","url":"https://takoyaking.hatenablog.com/entry/map_vs_and_then","blog_url":"https://takoyaking.hatenablog.com/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftakoyaking.hatenablog.com%2Fentry%2Fmap_vs_and_then\" title=\"Rust: map VS and_then - TAKOYAKING\u2019s blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"Rust\u306emap\u3068and_then\u304c\u6700\u521d\u898b\u305f\u3068\u304d\u306b\u3069\u3061\u3089\u3082\u52a0\u5de5\u3059\u308b\u3068\u3044\u3046\u51e6\u7406\u306a\u306e\u306b\u3001\u3069\u3046\u3044\u3046\u6642\u306b\u4f7f\u3044\u308f\u3051\u308b\u304b\u30a4\u30e1\u30fc\u30b8\u3067\u304d\u306a\u304b\u3063\u305f\u306e\u3067\u3001\u307e\u3068\u3081\u3066\u307f\u307e\u3057\u305f\u3002 (Option\u578b\u306b\u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u304c\u3001\u4f8b\u306fResult\u306b\u3057\u3066\u3044\u307e\u3059\u3002) map return\u306e\u578b: Result function\u306e\u578b: FnOnce(T) -> U (Result\u3067\u306f\u306a\u3044) function\u306fErr\u306a\u3089\u547c\u3070\u308c\u305a\u3001Ok\u306a\u3089\u547c\u3070\u308c\u308b and_then return\u306e\u578b: Result function\u306e\u578b: F: FnOnce(T) -> Result (Result\uff01) function\u306fErr\u306a\u3089\u547c\u3070\u308c\u305a\u3001Ok\u306a\u3089\u547c\u3070\u308c\u308b \u2026","categories":["Rust"],"image_url":"https://www.rust-lang.org/static/images/rust-social-wide.jpg","published":"2020-03-04 09:00:00","width":"100%","author_url":"https://blog.hatena.ne.jp/TAKOYAKING/","author_name":"TAKOYAKING","height":"190","title":"Rust: map VS and_then"}