{"url":"https://tech.fun-toy-life.com/entry/2026/06/03/195610","type":"rich","height":"190","blog_url":"https://tech.fun-toy-life.com/","author_url":"https://blog.hatena.ne.jp/plarail_hangout/","description":"Rust\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u5165\u9580\uff1aResult\u30fbOption\u30fb?\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9 \u306f\u3058\u3081\u306b Rust\u306b\u306f\u4f8b\u5916\uff08Exception\uff09\u304c\u3042\u308a\u307e\u305b\u3093\u3002\u4ee3\u308f\u308a\u306b Result<T, E> \u3068 Option<T> \u3068\u3044\u3046\u578b\u3067\u30a8\u30e9\u30fc\u3084\u5024\u306e\u6709\u7121\u3092\u8868\u73fe\u3057\u307e\u3059\u3002\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u30a8\u30e9\u30fc\u306e\u898b\u843d\u3068\u3057\u3092\u9632\u3044\u3067\u304f\u308c\u308b\u305f\u3081\u3001\u5b9f\u884c\u6642\u306e\u4e88\u671f\u3057\u306a\u3044\u30af\u30e9\u30c3\u30b7\u30e5\u3092\u5927\u5e45\u306b\u6e1b\u3089\u305b\u307e\u3059\u3002 Option\uff1a\u5024\u304c\u3042\u308b\u304b\u306a\u3044\u304b Option<T> \u306f\u5024\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u8868\u3057\u307e\u3059\u3002 enum Option<T> { Some(T), // \u5024\u304c\u3042\u308b None, // \u5024\u304c\u306a\u3044 } Vec::get \u3084 HashMap::get \u306a\u3069\u3001\u5024\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u53ef\u2026","published":"2026-06-03 19:56:10","provider_url":"https://hatena.blog","image_url":null,"version":"1.0","author_name":"plarail_hangout","blog_title":"Engineering Tech Dojo","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftech.fun-toy-life.com%2Fentry%2F2026%2F06%2F03%2F195610\" title=\"Rust\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u5165\u9580\uff1aResult\u30fbOption\u30fb?\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9 - Engineering Tech Dojo\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"Rust\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u5165\u9580\uff1aResult\u30fbOption\u30fb?\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9","width":"100%","provider_name":"Hatena Blog","categories":["Rust"]}