{"id":45671,"date":"2023-07-09T14:14:36","date_gmt":"2023-11-22T07:28:15","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/"},"modified":"2024-04-30T12:43:51","modified_gmt":"2024-04-30T04:43:51","slug":"45671-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/","title":{"rendered":""},"content":{"rendered":"

\u306f\u3058\u3081\u306b<\/h1>\n

\u307f\u306a\u3055\u3093\u3001Rust\u3057\u3066\u307e\u3059\u304b? Rust\u306e\u914d\u5217\u3063\u3066\u4f7f\u3044\u52dd\u624b\u304c\u60aa\u3044\u3067\u3059\u3088\u306d\u3002
\n\u4f8b\u3048\u3070String\u306e\u914d\u5217\u3092\u4f5c\u308d\u3046\u3068\u3057\u3066\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u304c\u901a\u3089\u306a\u3044\u7d4c\u9a13\u3068\u304b\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u3002
\n\u305d\u3093\u306a\u3001\u914d\u5217\u306e\u521d\u671f\u5316\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8e0f\u307f\u8fbc\u3093\u3060\u8a18\u4e8b\u304c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u306e\u3067\u3001\u307e\u3068\u3081\u3066\u307f\u307e\u3057\u305f\u3002
\n\u914d\u5217\u306e\u4f7f\u3044\u306b\u304f\u3055\u306b\u95a2\u3059\u308b\u89e3\u8aac\u8a18\u4e8b\u3082\u66f8\u3051\u305f\u3089\u66f8\u304d\u305f\u3044\u306a\u2026\u3002<\/p>\n

\u914d\u5217\u306e\u4ee3\u308f\u308a\u306bVec\u3092\u4f7f\u3046<\/h1>\n

\u524d\u63d0\u3092\u8986\u3059\u3088\u3046\u3067\u3059\u304c\u3001\u300eRust\u3067\u914d\u5217\u3092\u4f7f\u3048\u300f\u306f\u5168\u3066\u8a50\u6b3a\u3067\u3059\u3002Vec\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002
\nVec\u306f\u914d\u5217\u306e\u4e0a\u4f4d\u4e92\u63db\u3067\u3059\u3002\u914d\u5217\u3067\u51fa\u6765\u308b\u3053\u3068\u306fVec\u3067\u3082\u51fa\u6765\u307e\u3059\u3057\u3001\u30aa\u30fc\u30d0\u30d8\u30c3\u30c9\u304c\u554f\u984c\u3068\u306a\u308b\u3053\u3068\u3082\u666e\u901a\u306f\u7121\u3044\u306f\u305a\u3067\u3059\u3002Vec\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002
\nVec\u306e\u521d\u671f\u5316\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3001\u4f8b\u30923\u3064\u3060\u3051\u793a\u3057\u3066\u304a\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u8a9e\u308b\u5185\u5bb9\u3067\u3082\u306a\u3044\u6c17\u304c\u3059\u308b\u2026\u3002<\/p>\n

    \/\/ \u30de\u30af\u30ed\u3067\u521d\u671f\u5316<\/span>\r\n    let<\/span> a<\/span> =<\/span> vec!<\/span>[<\/span>\"a\"<\/span>.to_string<\/span>();<\/span> 10<\/span>];<\/span>\r\n    \/\/ push\u3067\u521d\u671f\u5316<\/span>\r\n    let<\/span> mut<\/span> b<\/span> =<\/span> Vec<\/span>::<\/span>with_capacity<\/span>(<\/span>10<\/span>);<\/span>\r\n    b<\/span>.push<\/span>(<\/span>1<\/span>);<\/span>\r\n    b<\/span>.push<\/span>(<\/span>2<\/span>);<\/span>\r\n    b<\/span>.push<\/span>(<\/span>3<\/span>);<\/span>\r\n    \/\/ \u30a4\u30c6\u30ec\u30fc\u30bf\u3067\u521d\u671f\u5316<\/span>\r\n    let<\/span> c<\/span>:<\/span> Vec<\/span><<\/span>i32<\/span>><\/span> =<\/span> (<\/span>0<\/span>..<\/span>100<\/span>)<\/span>.collect<\/span>();<\/span>\r\n<\/code><\/pre>\n
Vec\u304b\u3089\u751f\u6210\u3059\u308b<\/h1>\n
\u914d\u5217\u306e\u521d\u671f\u5316\u65b9\u6cd5\u3067\u6700\u3082\u91cd\u8981\u306a\u306e\u304c\u3001Vec\u304b\u3089\u306e\u5909\u63db\u3067\u3059\u3002\u3053\u308c\u4e00\u3064\u3060\u3051\u899a\u3048\u3066\u304a\u3051\u3070\u5927\u62b5\u306f\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002
\nVec\u306e\u5927\u304d\u3055\u304cN\u3067\u306a\u3044\u5834\u5408\u306f\u3001unwrap\u3067\u843d\u3061\u307e\u3059\u3002<\/p>\n
    use<\/span> std<\/span>::<\/span>convert<\/span>::<\/span>TryInto<\/span>;<\/span>\r\n    \/\/ 1.48.0 \u4ee5\u964d<\/span>\r\n    let<\/span> output<\/span>:<\/span> [<\/span>T<\/span>;<\/span> N<\/span>]<\/span> =<\/span> input<\/span>.try_into<\/span>()<\/span>.unwrap<\/span>();<\/span>\r\n<\/code><\/pre>\n
\u30b9\u30bf\u30c3\u30af\u9818\u57df\u3092\u4ecb\u3055\u305a\u306b\u76f4\u63a5Box\u3067\u5305\u3093\u3067\u751f\u6210\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n
    use<\/span> std<\/span>::<\/span>convert<\/span>::<\/span>TryInto<\/span>;<\/span>\r\n    \/\/ 1.43.0 \u4ee5\u964d<\/span>\r\n    let<\/span> output<\/span>:<\/span> Box<\/span><<\/span>[<\/span>T<\/span>;<\/span> N<\/span>]<\/span>><\/span> =<\/span> input<\/span>.into_boxed_slice<\/span>()<\/span>.try_into<\/span>()<\/span>.unwrap<\/span>();<\/span>\r\n<\/code><\/pre>\n
\u30a4\u30c6\u30ec\u30fc\u30bf\u304b\u3089\u751f\u6210\u3059\u308b<\/h1>\n
\u30a4\u30c6\u30ec\u30fc\u30bf\u2192Vec\u2192\u914d\u5217\u306e\u3088\u3046\u306b\u3001\u4e00\u65e6Vec\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u7279\u306b\u65b0\u3057\u3044\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n
    use<\/span> std<\/span>::<\/span>convert<\/span>::<\/span>TryInto<\/span>;<\/span>\r\n    let<\/span> tmp<\/span>:<\/span> Vec<\/span><<\/span>T<\/span>><\/span> =<\/span> input<\/span>.take<\/span>(<\/span>N<\/span>)<\/span>.collect<\/span>();<\/span>\r\n    \/\/ 1.48.0 \u4ee5\u964d<\/span>\r\n    let<\/span> output<\/span>:<\/span> [<\/span>T<\/span>;<\/span> N<\/span>]<\/span> =<\/span> tmp<\/span>.try_into<\/span>()<\/span>.unwrap<\/span>();<\/span>\r\n<\/code><\/pre>\n
Box\u306e\u5834\u5408<\/p>\n
    use<\/span> std<\/span>::<\/span>convert<\/span>::<\/span>TryInto<\/span>;<\/span>\r\n    let<\/span> tmp<\/span>:<\/span> Box<\/span><<\/span>[<\/span>T<\/span>]<\/span>><\/span> =<\/span> input<\/span>.take<\/span>(<\/span>N<\/span>)<\/span>.collect<\/span>();<\/span>\r\n    \/\/ 1.43.0 \u4ee5\u964d<\/span>\r\n    let<\/span> output<\/span>:<\/span> Box<\/span><<\/span>[<\/span>T<\/span>;<\/span> N<\/span>]<\/span>><\/span> =<\/span> tmp<\/span>.try_into<\/span>()<\/span>.unwrap<\/span>();<\/span>\r\n<\/code><\/pre>\n
\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u5b9a\u6570\u304b\u3089\u751f\u6210\u3059\u308b<\/h1>\n
1.38\u3067\u3046\u3063\u304b\u308a\u6709\u52b9\u5316\u3055\u308c\u30011.50\u3067\u4e8b\u5f8c\u627f\u8a8d\u3055\u308c\u305f\u66f0\u304f\u4ed8\u304d\u306e\u6a5f\u80fd\u3060\u305d\u3046\u3067\u3059\u3002<\/p>\n
    \/\/<\/span>\r\n    const<\/span> INIT_VEC<\/span>:<\/span> Vec<\/span><<\/span>T<\/span>><\/span> =<\/span> Vec<\/span>::<\/span>new<\/span>();<\/span>\r\n    let<\/span> data_bin<\/span> =<\/span> [<\/span>INIT_VEC<\/span>;<\/span> N<\/span>];<\/span>\r\n    \/\/<\/span>\r\n    const<\/span> INIT_VAL<\/span>:<\/span> Option<\/span><<\/span>T<\/span>><\/span> =<\/span> None<\/span>;<\/span>\r\n    let<\/span> lazy_array<\/span> =<\/span> [<\/span>INIT_VAL<\/span>;<\/span> N<\/span>];<\/span>\r\n    \/\/<\/span>\r\n    let<\/span> str_array<\/span> =<\/span> {<\/span>\r\n        const<\/span> INIT_VAL<\/span>:<\/span> String<\/span> =<\/span> String<\/span>::<\/span>new<\/span>();<\/span>\r\n        [<\/span>INIT_VAL<\/span>;<\/span> N<\/span>]<\/span>\r\n    };<\/span>\r\n<\/code><\/pre>\n
 <\/p>\n
\u7a93\u3068\u3057\u3066\u53c2\u7167\u3092\u751f\u6210\u3059\u308b<\/h1>\n
\u914d\u5217\u306e\u5b9f\u4f53\u304c\u672c\u5f53\u306b\u5fc5\u8981\u3067\u3057\u305f\u304b? \u53c2\u7167\u3060\u3051\u3067\u826f\u3044\u5834\u5408\u3001\u9577\u3044\u914d\u5217\u3084Vec\u306e\u4e00\u90e8\u3092\u7a93\u306e\u3088\u3046\u306b\u5207\u308a\u53d6\u3063\u3066\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002<\/p>\n
    use<\/span> std<\/span>::<\/span>convert<\/span>::<\/span>TryInto<\/span>;<\/span>\r\n    let<\/span> tmp<\/span>:<\/span> &<\/span>mut<\/span> [<\/span>T<\/span>]<\/span> =<\/span> &<\/span>mut<\/span> input<\/span>[<\/span>0<\/span>..<\/span>N<\/span>];<\/span>\r\n    \/\/ 1.34.0 \u4ee5\u964d<\/span>\r\n    let<\/span> output<\/span>:<\/span> &<\/span>mut<\/span> [<\/span>T<\/span>;<\/span> N<\/span>]<\/span> =<\/span> tmp<\/span>.try_into<\/span>()<\/span>.unwrap_or_else<\/span>(|<\/span>_<\/span>|<\/span> unreachable!<\/span>());<\/span>\r\n\r\n<\/code><\/pre>\n
\u307e\u3068\u3081<\/h1>\n
    \n
  • \n
      \u300eRust\u3067\u914d\u5217\u3092\u4f7f\u3048\u300f\u306f\u5168\u3066\u8a50\u6b3a\u3002\u4ee3\u308f\u308a\u306bVec\u3092\u4f7f\u3046\u3002<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          \u914d\u5217\u306fVec\u3092\u5909\u63db\u3057\u3066\u751f\u6210\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \u300eRust\u3067\u914d\u5217\u3092\u4f7f\u3048\u300f\u306f(ry<\/ul>\n","protected":false},"excerpt":{"rendered":"
            \u306f\u3058\u3081\u306b \u307f\u306a\u3055\u3093\u3001Rust\u3057\u3066\u307e\u3059\u304b? Rust\u306e\u914d\u5217\u3063\u3066\u4f7f\u3044\u52dd\u624b\u304c\u60aa\u3044\u3067\u3059\u3088\u306d\u3002 \u4f8b\u3048\u3070String\u306e\u914d\u5217 […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45671","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u306f\u3058\u3081\u306b \u307f\u306a\u3055\u3093\u3001Rust\u3057\u3066\u307e\u3059\u304b? Rust\u306e\u914d\u5217\u3063\u3066\u4f7f\u3044\u52dd\u624b\u304c\u60aa\u3044\u3067\u3059\u3088\u306d\u3002 \u4f8b\u3048\u3070String\u306e\u914d\u5217 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-11-22T07:28:15+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-30T04:43:51+00:00\" \/>\n<meta name=\"author\" content=\"\u6e05, \u5b87\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6e05, \u5b87\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/\",\"name\":\"- Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-11-22T07:28:15+00:00\",\"dateModified\":\"2024-04-30T04:43:51+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/1a6ecd3d914d22a5ac32791ffc1fbd8e\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/\"]}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/1a6ecd3d914d22a5ac32791ffc1fbd8e\",\"name\":\"\u6e05, \u5b87\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/4b2016c18459a605fc469c7566608f5686491baa112d0871ee613f61b7210565?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/4b2016c18459a605fc469c7566608f5686491baa112d0871ee613f61b7210565?s=96&d=mm&r=g\",\"caption\":\"\u6e05, \u5b87\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/qingyu\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"- Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/","og_locale":"zh_CN","og_type":"article","og_description":"\u306f\u3058\u3081\u306b \u307f\u306a\u3055\u3093\u3001Rust\u3057\u3066\u307e\u3059\u304b? Rust\u306e\u914d\u5217\u3063\u3066\u4f7f\u3044\u52dd\u624b\u304c\u60aa\u3044\u3067\u3059\u3088\u306d\u3002 \u4f8b\u3048\u3070String\u306e\u914d\u5217 […]","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-11-22T07:28:15+00:00","article_modified_time":"2024-04-30T04:43:51+00:00","author":"\u6e05, \u5b87","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u6e05, \u5b87","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"1 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/","name":"- Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website"},"datePublished":"2023-11-22T07:28:15+00:00","dateModified":"2024-04-30T04:43:51+00:00","author":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/1a6ecd3d914d22a5ac32791ffc1fbd8e"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/"]}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website","url":"https:\/\/www.silicloud.com\/zh\/blog\/","name":"Blog - Silicon Cloud","description":"","inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/1a6ecd3d914d22a5ac32791ffc1fbd8e","name":"\u6e05, \u5b87","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/4b2016c18459a605fc469c7566608f5686491baa112d0871ee613f61b7210565?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/4b2016c18459a605fc469c7566608f5686491baa112d0871ee613f61b7210565?s=96&d=mm&r=g","caption":"\u6e05, \u5b87"},"url":"https:\/\/www.silicloud.com\/zh\/blog\/author\/qingyu\/"},{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/45671-2\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45671","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/comments?post=45671"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45671\/revisions"}],"predecessor-version":[{"id":91981,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45671\/revisions\/91981"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/media?parent=45671"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/categories?post=45671"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/tags?post=45671"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}