{"id":45297,"date":"2023-07-10T06:51:52","date_gmt":"2023-03-15T18:33:15","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45297-2\/"},"modified":"2024-04-30T12:49:58","modified_gmt":"2024-04-30T04:49:58","slug":"45297-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45297-2\/","title":{"rendered":""},"content":{"rendered":"

\u7af6\u30d7\u30eder\u306e\u307f\u306a\u3055\u3093\u3001\u3053\u3093\u306b\u3061\u306f\u3002
\nAtCoder \u306b\u3066\u3064\u3044\u306b\u5168\u30e6\u30fc\u30b6\u30fc\u5f85\u671b\u306e\u30b8\u30e3\u30c3\u30b8\u30b7\u30b9\u30c6\u30e0\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u304c\u5b9f\u884c\u3055\u308c\u3001\u672c\u65e5\u958b\u50ac\u3055\u308c\u308b AtCoder Beginner Contest 163 \u304b\u3089\u65b0\u30b7\u30b9\u30c6\u30e0\u304c\u516c\u5f0f\u30b3\u30f3\u30c6\u30b9\u30c8\u3067\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u6570\u3042\u308b\u8a00\u8a9e\u306e\u3046\u3061\u3001Rust \u306f\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u304c\u671b\u307e\u308c\u3066\u3044\u305f\u5ea6\u5408\u3044\u3067\u8a00\u3046\u3068\u4e0a\u4f4d\u306b\u5165\u308b\u306e\u3067\u306f\u306a\u3044\u304b\u3068\u52dd\u624b\u306b\u601d\u3063\u3066\u3044\u307e\u3059\u3002
\n\u65e7\u30b8\u30e3\u30c3\u30b8\u30b7\u30b9\u30c6\u30e0\u3067\u306e Rust \u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306f v1.15.1 \u3067\u3057\u305f\u3002\u3053\u308c\u306f 2017\/02\/09 \u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u3059\u3002
\n2020\/04\/12 \u73fe\u5728\u306e\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u3042\u308a\u3001AtCoder \u65b0\u30b8\u30e3\u30c3\u30b8\u30b7\u30b9\u30c6\u30e0\u3067\u4f7f\u7528\u53ef\u80fd\u3068\u306a\u308b v1.42.0 \u306f 2020\/03\/12 \u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u307e\u3057\u305f\u3002\u304a\u3088\u305d3\u5e74\u306e\u6642\u3092\u7d4c\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

Rust \u306f\u3053\u306e\u7d043\u5e74\u306e\u9593\u306b\u7740\u5b9f\u306b\u9032\u5316\u3092\u7d9a\u3051\u3066\u304d\u307e\u3057\u305f\u3002
\n\u305d\u306e\u9032\u5316\u306e\u4e2d\u306b\u306f\u3001\u7af6\u6280\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u5f79\u7acb\u3064\u3088\u3046\u306a\u3082\u306e\u3082\u6570\u591a\u304f\u5b58\u5728\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u3067\u306f\u3001\u305d\u306e\u3088\u3046\u306a\u9032\u5316\u306e\u6570\u3005\u3092\u3056\u3063\u3068\u7d39\u4ecb\u3067\u304d\u308c\u3070\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u7d39\u4ecb\u306e\u4ed5\u65b9<\/h1>\n

\u65e7\u30b8\u30e3\u30c3\u30b8\u30b7\u30b9\u30c6\u30e0 (v1.15.1) \u3067\u4f7f\u7528\u3067\u304d\u305a\u3001\u65b0\u30b8\u30e3\u30c3\u30b8\u30b7\u30b9\u30c6\u30e0 (v1.42.0) \u3067\u4f7f\u7528\u53ef\u80fd\u3068\u306a\u3063\u305f\u95a2\u6570\u306a\u3069\u306b\u5bfe\u3057\u3066\u3001\u72ec\u65ad\u3068\u504f\u898b\u3067\u300c\u5f79\u7acb\u3061\u5ea6\u300d\u30925\u70b9\u6e80\u70b9\u3067\u4ed8\u3051\u3066\u3001\u5c0e\u5165\u3055\u308c\u305f\u30d0\u30fc\u30b8\u30e7\u30f3\u304a\u3088\u3073\u304b\u3093\u305f\u3093\u306a\u30b3\u30fc\u30c9\u30b5\u30f3\u30d7\u30eb\u3068\u3068\u3082\u306b\u7d39\u4ecb\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002
\n\u3042\u3068\u3001\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3078\u306e\u30ea\u30f3\u30af\u3082\u4ed8\u3051\u307e\u3059\u3002\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306f Rustcean \u306e\u5fc3\u5f37\u3044\u5473\u65b9\u3067\u3059\u3002<\/p>\n

\u30b3\u30fc\u30c9\u30b5\u30f3\u30d7\u30eb\u306f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u3082\u306e\u3068\u307b\u307c\u540c\u3058\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3054\u4e86\u627f\u304f\u3060\u3055\u3044\u3002<\/p>\n

\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea<\/h1>\n

str::repeat \u2605\u2606\u2606\u2606\u2606<\/h2>\n

v1.16.0 \u301c<\/p>\n

&str \u3092\u6307\u5b9a\u56de\u6570\u7e70\u308a\u8fd4\u3057\u305f\u7d50\u679c\u306e\u6587\u5b57\u5217\u3092 String \u578b\u3067\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n

\"abc\"<\/span>.repeat<\/span>(<\/span>3<\/span>)<\/span> \/\/ String \u578b\u306e \"abcabcabc\" \u304c\u3067\u304d\u307e\u3059<\/span>\r\n<\/code><\/pre>\n
str::repeat – Rust<\/p>\n
String::insert_str \u2605\u2606\u2606\u2606\u2606<\/h2>\n
v1.16.0 \u301c<\/p>\n
\u53ef\u5909\u306a String \u306b\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6307\u5b9a\u3057\u3066\u6587\u5b57\u5217\u3092\u633f\u5165\u3057\u307e\u3059\u3002
\n\u8a08\u7b97\u91cf\u7684\u306b\u306f $O(n)$ \uff08$n$ \u306f\u633f\u5165\u5148\u306e\u6587\u5b57\u5217\u306e\u9577\u3055\uff09\u304b\u304b\u308b\u306e\u3067\u3001\u3042\u3093\u307e\u308a\u4f7f\u308f\u306a\u3044\u6c17\u304c\u3057\u307e\u3059\u3002
\n\u3042\u3068\u3001\u3054\u5b58\u77e5\u306e\u901a\u308a Rust \u306e String \u306f UTF-8 \u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u3066\u3044\u3066\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306e\u306f\u3001\u975e ASCII \u6587\u5b57\u304c\u542b\u307e\u308c\u308b\u3068\u304d\u306b\u306f\u60f3\u5b9a\u3068\u7570\u306a\u308b\u6319\u52d5\u3068\u306a\u308b\u3053\u3068\u304c\u307b\u3068\u3093\u3069\u3060\u3068\u601d\u3044\u307e\u3059\u3002\uff08\u7af6\u30d7\u30ed\u3060\u3068\u307e\u305a\u5927\u4e08\u592b\u3060\u3068\u306f\u601d\u3044\u307e\u3059\u304c\uff09<\/p>\n
let<\/span> mut<\/span> s<\/span> =<\/span> String<\/span>::<\/span>from<\/span>(<\/span>\"hoge\"<\/span>);<\/span>\r\ns<\/span>.insert_str<\/span>(<\/span>2<\/span>,<\/span> \"piyo\"<\/span>);<\/span> \/\/ \"hopiyoge\" \u306b\u306a\u308b<\/span>\r\n<\/code><\/pre>\n
std::string::String::insert_str – Rust<\/p>\n
BTreeMap::range & BTreeSet::range \u2605\u2605\u2605\u2605\u2606<\/h2>\n
v1.17.0 \u301c<\/p>\n
\u307f\u3093\u306a\u5927\u597d\u304d\u4e8c\u5206\u63a2\u7d22\u304c\u3067\u304d\u307e\u3059\u3002\u8a08\u7b97\u91cf $O(\\log n)$ \u306a\u306e\u3067\u3001\u7a4d\u6975\u7684\u306b\u4f7f\u3063\u3066\u3044\u3051\u307e\u3059\u3002<\/p>\n
std::collections::btree_map::BTreeMap – Rust
\nstd::collections::BTreeSet – Rust<\/p>\n
use<\/span> std<\/span>::<\/span>collections<\/span>::<\/span>BTreeSet<\/span>;<\/span>\r\n\r\nlet<\/span> mut<\/span> set<\/span> =<\/span> BTreeSet<\/span>::<\/span>new<\/span>();<\/span>\r\nset<\/span>.insert<\/span>(<\/span>3<\/span>);<\/span>\r\nset<\/span>.insert<\/span>(<\/span>5<\/span>);<\/span>\r\nset<\/span>.insert<\/span>(<\/span>8<\/span>);<\/span>\r\n\r\n\/\/ \u300c4 \u4ee5\u4e0a\u300d\u3092\u63a2\u3057\u305f\u3068\u304d\u306e \u3010\u6700\u521d\u3011 \u306e\u8981\u7d20 \u300c5\u300d \u304c\u5f97\u3089\u308c\u308b<\/span>\r\nassert_eq!<\/span>(<\/span>Some<\/span>(<\/span>&<\/span>5<\/span>),<\/span> set<\/span>.range<\/span>(<\/span>4<\/span>..<\/span>)<\/span>.next<\/span>());<\/span>\r\n\r\n\/\/ \u300c7 \u672a\u6e80\u300d\u3092\u63a2\u3057\u305f\u3068\u304d\u306e \u3010\u6700\u5f8c\u3011 \u306e\u8981\u7d20 \u300c5\u300d \u304c\u5f97\u3089\u308c\u308b\u3002 last \u3088\u308a next_back \u306e\u307b\u3046\u304c\u52b9\u7387\u304c\u826f\u3044<\/span>\r\nassert_eq!<\/span>(<\/span>Some<\/span>(<\/span>&<\/span>5<\/span>),<\/span> set<\/span>.range<\/span>(<\/span>..<\/span>7<\/span>)<\/span>.next_back<\/span>());<\/span>\r\n\r\n\/\/ \u300c8 \u4ee5\u4e0b\u300d\u3092\u63a2\u3057\u305f\u3068\u304d\u306e \u3010\u6700\u5f8c\u3011 \u306e\u8981\u7d20 \u300c8\u300d \u304c\u5f97\u3089\u308c\u308b\u3002<\/span>\r\nassert_eq!<\/span>(<\/span>Some<\/span>(<\/span>&<\/span>8<\/span>),<\/span> set<\/span>.range<\/span>(<\/span>..=<\/span>8<\/span>)<\/span>.next_back<\/span>());<\/span>\r\n<\/code><\/pre>\n
cmp::Reverse \u2605\u2605\u2605\u2605\u2605<\/h2>\n
v1.19.0 \u301c<\/p>\n
\u964d\u9806\u30bd\u30fc\u30c8\u3092\u3057\u305f\u3044\u3068\u304d\u306b\u4fbf\u5229\u3067\u3059\u3002
\n\u307e\u305f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067 max-heap \uff08pop \u3057\u305f\u3068\u304d\u306b\u6700\u5927\u306e\u5024\u304c\u51fa\u3066\u304f\u308b\uff09 \u3067\u3042\u308b Rust \u306e\u512a\u5148\u5ea6\u4ed8\u304d\u30ad\u30e5\u30fc BinaryHeap \u3092\u3001 min-heap \u306b\u3059\u308b\u305f\u3081\u306b\u3082\u4f7f\u3048\u307e\u3059\u3002\u30c0\u30a4\u30af\u30b9\u30c8\u30e9\u6cd5\u3092\u66f8\u304f\u3068\u304d\u304a\u4e16\u8a71\u306b\u306a\u308a\u305d\u3046\u3067\u3059\u3002<\/p>\n
std::cmp::Reverse – Rust
\nMin-Heap\u306e\u4f8b<\/p>\n
\/\/ \u964d\u9806\u30bd\u30fc\u30c8<\/span>\r\nuse<\/span> std<\/span>::<\/span>cmp<\/span>::<\/span>Reverse<\/span>;<\/span>\r\nlet<\/span> mut<\/span> v<\/span> =<\/span> vec!<\/span>[<\/span>3<\/span>,<\/span> 2<\/span>,<\/span> 4<\/span>,<\/span> 1<\/span>,<\/span> 5<\/span>,<\/span> 6<\/span>];<\/span>\r\nv<\/span>.sort_by_key<\/span>(|<\/span>&<\/span>k<\/span>|<\/span> Reverse<\/span>(<\/span>k<\/span>));<\/span> \/\/ v \u306f vec![6, 5, 4, 3, 2, 1] \u306b\u306a\u308b<\/span>\r\n\r\n\/\/ min-heap<\/span>\r\nuse<\/span> std<\/span>::<\/span>collections<\/span>::<\/span>BinaryHeap<\/span>;<\/span>\r\nlet<\/span> mut<\/span> heap<\/span> =<\/span> BinaryHeap<\/span>::<\/span>new<\/span>();<\/span>\r\nheap<\/span>.push<\/span>(<\/span>Reverse<\/span>(<\/span>2<\/span>));<\/span>\r\nheap<\/span>.push<\/span>(<\/span>Reverse<\/span>(<\/span>5<\/span>));<\/span>\r\nheap<\/span>.push<\/span>(<\/span>Reverse<\/span>(<\/span>1<\/span>));<\/span>\r\n\r\nlet<\/span> Reverse<\/span>(<\/span>first<\/span>)<\/span> =<\/span> heap<\/span>.pop<\/span>()<\/span>.unwrap<\/span>();<\/span> \/\/ first \u306b\u306f \uff11 \u304c\u5165\u308b<\/span>\r\nlet<\/span> Reverse<\/span>(<\/span>second<\/span>)<\/span> =<\/span> heap<\/span>.pop<\/span>()<\/span>.unwrap<\/span>();<\/span> \/\/ second \u306b\u306f 2 \u304c\u5165\u308b<\/span>\r\nlet<\/span> Reverse<\/span>(<\/span>third<\/span>)<\/span> =<\/span> heap<\/span>.pop<\/span>()<\/span>.unwrap<\/span>();<\/span>  \/\/ third \u306b\u306f 5 \u304c\u5165\u308b<\/span>\r\n<\/code><\/pre>\n
FromStr \u30c8\u30ec\u30a4\u30c8\u304c char \u306b\u5bfe\u3057\u3066\u5b9f\u88c5\u3055\u308c\u305f \u2605\u2606\u2606\u2606\u2606<\/h2>\n
v1.20.0 \u301c<\/p>\n
\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3057\u3066 str \u578b\u304b\u3089 char \u578b\u306b\u5909\u63db\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002
\n\u5165\u529b\u306e\u8aad\u307f\u53d6\u308a\u306e\u3068\u304d\u306b\u4f7f\u3048\u308b\u2026\u2026\u2026\u304b\u3082\uff1f\uff1f<\/p>\n
let<\/span> c<\/span> =<\/span> \"s\"<\/span>.parse<\/span>::<\/span><<\/span>char<\/span>><\/span>()<\/span>.unwrap<\/span>();<\/span> \/\/ `char::from_str(\"c\")`\u304c\u547c\u3070\u308c\u308b<\/span>\r\n<\/code><\/pre>\n
add FromStr Impl for char by tinaun \u00b7 Pull Request #42271 \u00b7 rust-lang\/rust<\/p>\n
str::get \u2605\u2605\u2606\u2606\u2606<\/h2>\n
v1.20.0 \u301c<\/p>\n
\u90e8\u5206\u6587\u5b57\u5217\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u57fa\u672c\u306f Vec \u306b\u3059\u3079\u304d\u3060\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u7af6\u30d7\u30ed\u3067\u306f ASCII \u6587\u5b57\u5217\u4ee5\u5916\u304c\u51fa\u3066\u304f\u308b\u3053\u3068\u306f\u307b\u307c\u306a\u3044\u3068\u601d\u3046\u306e\u3067\u3001 str \u306e\u307e\u307e\u3001\u3084\u3063\u3066\u3082\u826f\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n
str – Rust<\/p>\n
let<\/span> s<\/span> =<\/span> \"hoge\"<\/span>;<\/span>\r\n\r\nassert_eq!<\/span>(<\/span>s<\/span>.get<\/span>(<\/span>1<\/span>..<\/span>2<\/span>),<\/span> Some<\/span>(<\/span>\"o\"<\/span>));<\/span>\r\nassert_eq!<\/span>(<\/span>s<\/span>.get<\/span>(<\/span>1<\/span>..<\/span>3<\/span>),<\/span> Some<\/span>(<\/span>\"og\"<\/span>));<\/span>\r\n<\/code><\/pre>\n
x += &42; \u306e\u3088\u3046\u306b\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u3063\u305f \u2605\u2605\u2606\u2606\u2606<\/h2>\n
v1.22.0 \u301c<\/p>\n
\u4f55\u306e\u3053\u3068\u3084\u3089\u308f\u304b\u308a\u306b\u304f\u3044\u3068\u601d\u3046\u306e\u3067\u4f8b\u3092\u898b\u3066\u3044\u305f\u3060\u304f\u306e\u304c\u826f\u3044\u3068\u601d\u3044\u307e\u3059\u3002
\n\u5730\u5473\u306b\u3042\u308a\u304c\u305f\u3044\u304b\u3082\u3057\u308c\u306a\u3044\u3067\u3059\u3002<\/p>\n
Allow T op= &T for built-in numeric types T v2 by Eh2406 \u00b7 Pull Request #44287 \u00b7 rust-lang\/rust<\/p>\n
let<\/span> mut<\/span> x<\/span> =<\/span> 7<\/span>;<\/span>\r\nx<\/span> +=<\/span> &<\/span>42<\/span>;<\/span> \/\/ x \u306f 49 \u306b\u306a\u308b<\/span>\r\n<\/code><\/pre>\n
\u9589\u533a\u9593 [n, m] \u3092n..=m \u3067\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u3063\u305f \u2605\u2605\u2605\u2605\u2605<\/h2>\n
v1.26.0 \u301c<\/p>\n
$1 \\leq i \\leq N$ \u3067 for \u3092\u56de\u3057\u305f\u3044\u3001\u306a\u3093\u3066\u5834\u5408\u304c\u305f\u307e\u306b\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u304c\u3001v1.15.1 \u3067\u306f
\nfor i in 1..(N + 1)
\n\u306e\u3088\u3046\u306b\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n
\u4eca\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u3051\u307e\u3059\u3002<\/p>\n
for<\/span> i<\/span> in<\/span> 1<\/span>..=<\/span>N<\/span> {<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> i<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
String::retain \u2605\u2605\u2606\u2606\u2606<\/h2>\n
v1.26.0 \u301c<\/p>\n
String \u306e\u53ef\u5909\u501f\u7528\u3092\u53d7\u3051\u53d6\u308a\u3001\u30af\u30ed\u30fc\u30b8\u30e3\u3067\u300c\u6587\u5b57\u5217\u306b\u6b8b\u3059\u6761\u4ef6\u300d\u3092\u6307\u5b9a\u3057\u3066\u3001\u6587\u5b57\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306e\u3088\u3046\u306a\u3053\u3068\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n
std::string::String – Rust<\/p>\n
let<\/span> mut<\/span> s<\/span> =<\/span> String<\/span>::<\/span>from<\/span>(<\/span>\"f_o_ob_ar\"<\/span>);<\/span>\r\n\r\ns<\/span>.retain<\/span>(|<\/span>c<\/span>|<\/span> c<\/span> !=<\/span> '_'<\/span>);<\/span> \/\/ s \u306f \"foobar\" \u306b\u306a\u308b<\/span>\r\n<\/code><\/pre>\n
hash_map::Entry::and_modify & btree_map::Entry::and_modify \u2605\u2606\u2606\u2606\u2606<\/h2>\n
v1.26.0 \u301c<\/p>\n
\u4f8b\u3048\u3070\u3001\u6587\u5b57\u5217\u4e2d\u306e\u5404\u6587\u5b57\u306e\u51fa\u73fe\u56de\u6570\u3092\u6c42\u3081\u305f\u3044\u3068\u304d\u306b\u3001 \u6587\u5b57\u5217\u3092\uff11\u6587\u5b57\u305a\u3064\u30eb\u30fc\u30d7\u3067\u8210\u3081\u306a\u304c\u3089 HashMap \u3092\u4f7f\u3063\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u64cd\u4f5c\u3059\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
\u6587\u5b57 $c$ \u3092\u30ad\u30fc\u3068\u3057\u3066\u3001\u5bfe\u5fdc\u3059\u308b\u5024\u304c\u3059\u3067\u306b\u5165\u3063\u3066\u3044\u308c\u3070\u3001\u305d\u306e\u5024\u3092\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u3059\u308b\u3002\u306a\u3051\u308c\u3070\u3001\u5024\u306b\uff11\u3092\u5165\u308c\u308b\u3002<\/p><\/blockquote>\n
\u5f93\u6765\u3067\u3042\u308c\u3070\u3053\u306e\u3088\u3046\u306a\u64cd\u4f5c\u306f\u6b21\u306e\u3088\u3046\u306b\u884c\u3063\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n
use<\/span> std<\/span>::<\/span>collections<\/span>::<\/span>HashMap<\/span>;<\/span>\r\nlet<\/span> mut<\/span> map<\/span> =<\/span> HashMap<\/span>::<\/span>new<\/span>();<\/span>\r\n\r\n*<\/span>map<\/span>.entry<\/span>(<\/span>'x'<\/span>)<\/span>.or_insert<\/span>(<\/span>0<\/span>)<\/span> +=<\/span> 1<\/span>;<\/span> \/\/ \u30ad\u30fc 'x' \u306b\u5bfe\u3057\u3066\u5024 1 \u304c\u30bb\u30c3\u30c8\u3055\u308c\u308b<\/span>\r\n<\/code><\/pre>\n
\u3053\u308c\u3092\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u6587\u5b57\u6570\u306f\u591a\u304f\u306a\u308a\u307e\u3059\u304c\u3001\u610f\u5473\u5408\u3044\u306f\u5206\u304b\u308a\u3084\u3059\u304f\u306a\u308b\u6c17\u304c\u3057\u307e\u3059\u3002<\/p>\n
use<\/span> std<\/span>::<\/span>collections<\/span>::<\/span>HashMap<\/span>;<\/span>\r\nlet<\/span> mut<\/span> map<\/span> =<\/span> HashMap<\/span>::<\/span>new<\/span>();<\/span>\r\n\r\nmap<\/span>.entry<\/span>(<\/span>'x'<\/span>)<\/span>.and_modify<\/span>(|<\/span>e<\/span>|<\/span> *<\/span>e<\/span> +=<\/span> 1<\/span>)<\/span>.or_insert<\/span>(<\/span>1<\/span>);<\/span> \/\/ \u4e0a\u8a18\u3068\u540c\u69d8\u306e\u72b6\u614b\u306b\u306a\u308b<\/span>\r\n<\/code><\/pre>\n
std::collections::hash_map::Entry – Rust
\nstd::collections::btree_map::Entry – Rust<\/p>\n
\u501f\u7528\u30c1\u30a7\u30c3\u30ab\u306b\u6012\u3089\u308c\u306b\u304f\u304f\u306a\u3063\u305f \u2605\u2605\u2605\u2605\u2605<\/h2>\n
v1.31.0 \u301c \uff082018 Edition\uff09<\/p>\n
v1.15.1 \u3067\u306f\u3001\u53c2\u7167\u306e\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u306e\u63a8\u8ad6\u3092\u30ec\u30ad\u30b7\u30ab\u30eb\u30b9\u30b3\u30fc\u30d7\u306b\u57fa\u3065\u3044\u3066\u884c\u3063\u3066\u3044\u305f\u305f\u3081\u3001\u30d7\u30ed\u30b0\u30e9\u30de\u304b\u3089\u3059\u308b\u3068\u300c\u554f\u984c\u306a\u3044\u300d\u3068\u3044\u3046\u3053\u3068\u304c\u5206\u304b\u308b\u3088\u3046\u306a\u66f8\u304d\u65b9\u3067\u3042\u3063\u3066\u3082\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u6012\u3089\u308c\u3066\u3057\u307e\u3046\u3068\u3044\u3063\u305f\u5834\u5408\u304c\u767a\u751f\u3057\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n
Non-lexical lifetimes – The Edition Guide<\/p>\n
\u306b\u8f09\u3063\u3066\u3044\u308b\u4f8b\u304b\u3089\u5f15\u7528\u3057\u3001\u5c11\u3057\u6539\u5909\u3057\u305f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u8003\u3048\u3066\u307f\u307e\u3059\u3002<\/p>\n
fn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> mut<\/span> x<\/span> =<\/span> \"foo\"<\/span>.to_string<\/span>();<\/span>\r\n\r\n    \/\/ x \u306b\u5bfe\u3059\u308b\u4e0d\u5909\u501f\u7528\u3092\u3068\u308b\u3002<\/span>\r\n    \/\/ \u30ec\u30ad\u30b7\u30ab\u30eb\u30b9\u30b3\u30fc\u30d7\u306b\u57fa\u3065\u304f\u3068\u3001 y \u306e\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u306f y \u304c\u30b9\u30b3\u30fc\u30d7\u3092\u629c\u3051\u308b\u307e\u3067\uff08= main \u95a2\u6570\u304c\u7d42\u4e86\u3059\u308b\u307e\u3067)\u3068\u306a\u308b\u3002<\/span>\r\n    \/\/ \u501f\u7528\u898f\u5247\u306b\u3088\u308a\u3001 y \u304c\u751f\u5b58\u3057\u3066\u3044\u308b\u9593\u306f\u3001 x \u306b\u5bfe\u3059\u308b\u53ef\u5909\u306e\u501f\u7528\u3092\u3068\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u3002<\/span>\r\n    let<\/span> y<\/span> =<\/span> &<\/span>x<\/span>;<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> y<\/span>);<\/span>  \/\/ \"foo\" \u304c\u51fa\u529b\u3055\u308c\u308b (1) <\/span>\r\n\r\n    \/\/ x \u306b\u5bfe\u3059\u308b\u53ef\u5909\u501f\u7528\u3092\u3068\u308d\u3046\u3068\u3059\u308b\u3002<\/span>\r\n    \/\/ \u4e0d\u5909\u501f\u7528 y \u304c\u751f\u5b58\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308b<\/span>\r\n    let<\/span> z<\/span> =<\/span> &<\/span>mut<\/span> x<\/span>;<\/span> \/\/ (2)<\/span>\r\n    z<\/span>.push_str<\/span>(<\/span>\"bar\"<\/span>);<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> z<\/span>);<\/span> \/\/ \"foobar\" \u304c\u51fa\u529b\u3055\u308c\u308b<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u30b3\u30e1\u30f3\u30c8\u306b\u66f8\u3044\u305f\u3068\u304a\u308a\u3001\u30ec\u30ad\u30b7\u30ab\u30eb\u30b9\u30b3\u30fc\u30d7\u306b\u57fa\u3065\u304f\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u63a8\u8ad6\u306b\u57fa\u3065\u304f\u3068\u3001\u3053\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u306f\u501f\u7528\u898f\u5247\u306b\u53cd\u3059\u308b\u305f\u3081\u30b3\u30f3\u30d1\u30a4\u30eb\u304c\u901a\u308a\u307e\u305b\u3093\u3002<\/p>\n
\u3057\u304b\u3057\u3001v1.31.0 \u4ee5\u964d\uff082018 Edition\uff09\u3067\u5c0e\u5165\u3055\u308c\u305f Non-lexical lifetimes \u3068\u3044\u3046\u4ed5\u7d44\u307f\u306b\u3088\u308c\u3070\u3001\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306f\u554f\u984c\u306a\u304f\u30b3\u30f3\u30d1\u30a4\u30eb\u304c\u901a\u308a\u307e\u3059\u3002
\n\u3053\u308c\u306f\u3001x \u306e\u4e0d\u5909\u501f\u7528 y \u306f (1) \u3088\u308a\u5f8c\u308d\u3067\u306f\u4f7f\u308f\u308c\u3066\u3044\u306a\u3044\u306e\u3067\u3001 y \u306e\u751f\u5b58\u671f\u9593\u306f (2) \u3088\u308a\u524d\u306b\u7d42\u308f\u308b\u3068\u63a8\u8ad6\u3057\u3066\u3082\u554f\u984c\u306a\u3044\u304b\u3089\u3067\u3059\u3002<\/p>\n
\u3053\u306e\u81ea\u7136\u306a\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u63a8\u8ad6\u304c\u53d6\u308a\u5165\u308c\u3089\u308c\u305f\u3053\u3068\u3067\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u6012\u3089\u308c\u308b\u3053\u3068\u304c\u6e1b\u308a\uff08\u307e\u305f\u3001\u6012\u3089\u308c\u305f\u3068\u304d\u306e\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3082\u5206\u304b\u308a\u3084\u3059\u304f\u306a\u3063\u305f\uff09\u3001\u7af6\u30d7\u30ed\u306b\u9650\u3089\u305a Rust \u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306f\u3068\u3066\u3082\u3084\u308a\u3084\u3059\u304f\u306a\u3063\u305f\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
slice::chunks_exact \u306a\u3069 \u2605\u2605\u2606\u2606\u2606<\/h2>\n
v1.31.0 \u301c<\/p>\n
\u5f93\u6765\u304b\u3089\u3042\u3063\u305f slice::chunks \u3068\u5c11\u3057\u3060\u3051\u6319\u52d5\u304c\u7570\u306a\u308b\u30e1\u30bd\u30c3\u30c9\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002
\nslice::chunks \u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30c1\u30e3\u30f3\u30af\u30b5\u30a4\u30ba\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u30b9\u30e9\u30a4\u30b9\u3092\u5c0f\u3055\u306a\u56fa\u307e\u308a\u306b\u5206\u5272\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n
let<\/span> slice<\/span> =<\/span> [<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>];<\/span>\r\nlet<\/span> mut<\/span> iter<\/span> =<\/span> slice<\/span>.chunks<\/span>(<\/span>2<\/span>);<\/span>\r\nassert_eq!<\/span>(<\/span>iter<\/span>.next<\/span>()<\/span>.unwrap<\/span>(),<\/span> &<\/span>[<\/span>1<\/span>,<\/span> 2<\/span>]);<\/span> \/\/ \u6700\u521d\u306e\uff12\u3064<\/span>\r\nassert_eq!<\/span>(<\/span>iter<\/span>.next<\/span>()<\/span>.unwrap<\/span>(),<\/span> &<\/span>[<\/span>3<\/span>,<\/span> 4<\/span>]);<\/span> \/\/ \u6b21\u306e\uff12\u3064<\/span>\r\nassert_eq!<\/span>(<\/span>iter<\/span>.next<\/span>()<\/span>.unwrap<\/span>(),<\/span> &<\/span>[<\/span>5<\/span>]);<\/span> \/\/ \u6b21\u306e\uff12\u3064...\u306f\u306a\u3044\u306e\u3067\u3001\uff11\u3064\u3060\u3051 \uff08\uff0a\uff09<\/span>\r\nassert<\/span>!<\/span>(<\/span>iter<\/span>.next<\/span>()<\/span>.is_none<\/span>());<\/span>\r\n<\/code><\/pre>\n
\u4e0a\u306e\u4f8b\u3067 \uff08\uff0a\uff09\u3067\u793a\u3057\u305f\u7b87\u6240\u306b\u304a\u3044\u3066\u3001\u300c\u30c1\u30e3\u30f3\u30af\u30b5\u30a4\u30ba\u306b\u6e80\u305f\u306a\u3044\u5206\u3057\u304b\u6b8b\u3063\u3066\u3044\u306a\u3044\u3051\u3069\u3001\u6b8b\u3063\u305f\u5206\u3059\u3079\u3066\u3092\u8fd4\u3059\u300d\u3068\u3044\u3046\u3088\u3046\u306a\u6319\u52d5\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002
\n\u3053\u308c\u3092\u3001\u300c\u30c1\u30e3\u30f3\u30af\u30b5\u30a4\u30ba\u306b\u6e80\u305f\u306a\u3044\u5206\u3057\u304b\u6b8b\u3063\u3066\u3044\u306a\u3044\u5834\u5408\u306b\u306f\u3001None \u3092\u8fd4\u3057\u3066\u3057\u307e\u3046\u300d\u3068\u3044\u3046\u3088\u3046\u306b\u5909\u308f\u3063\u305f\u3082\u306e\u304c slice::chunks_exact \u3067\u3059\u3002<\/p>\n
let<\/span> slice<\/span> =<\/span> [<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>];<\/span>\r\nlet<\/span> mut<\/span> iter<\/span> =<\/span> slice<\/span>.chunks_exact<\/span>(<\/span>2<\/span>);<\/span>\r\nassert_eq!<\/span>(<\/span>iter<\/span>.next<\/span>()<\/span>.unwrap<\/span>(),<\/span> &<\/span>[<\/span>1<\/span>,<\/span> 2<\/span>]);<\/span> \/\/ \u6700\u521d\u306e\uff12\u3064<\/span>\r\nassert_eq!<\/span>(<\/span>iter<\/span>.next<\/span>()<\/span>.unwrap<\/span>(),<\/span> &<\/span>[<\/span>3<\/span>,<\/span> 4<\/span>]);<\/span> \/\/ \u6b21\u306e\uff12\u3064<\/span>\r\nassert<\/span>!<\/span>(<\/span>iter<\/span>.next<\/span>()<\/span>.is_none<\/span>());<\/span> \/\/ \u6b21\u306e\uff12\u3064...\u306f\u306a\u3044\u306e\u3067\u3001 None \u3092\u8fd4\u3059<\/span>\r\nassert_eq!<\/span>(<\/span>iter<\/span>.remainder<\/span>(),<\/span> &<\/span>[<\/span>5<\/span>]);<\/span> \/\/ reminder() \u3092\u547c\u3076\u3068\u3001\u4f59\u308a\u304c\u5f97\u3089\u308c\u308b<\/span>\r\n<\/code><\/pre>\n
\u4ed6\u306b\u3082 slice::rchunks \u3082\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002\u540d\u524d\u306e\u901a\u308a\u3001\u30b9\u30e9\u30a4\u30b9\u306e\u7d42\u308f\u308a\u5074\u304b\u3089\u958b\u59cb\u3059\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u306e chunks \u3067\u3059\u3002<\/p>\n
let<\/span> slice<\/span> =<\/span> [<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>];<\/span>\r\nlet<\/span> mut<\/span> iter<\/span> =<\/span> slice<\/span>.rchunks<\/span>(<\/span>2<\/span>);<\/span>\r\nassert_eq!<\/span>(<\/span>iter<\/span>.next<\/span>()<\/span>.unwrap<\/span>(),<\/span> &<\/span>[<\/span>4<\/span>,<\/span> 5<\/span>]);<\/span> \/\/ \uff08\u7d42\u308f\u308a\u5074\u304b\u3089\u898b\u3066\uff09\u6700\u521d\u306e\uff12\u3064<\/span>\r\nassert_eq!<\/span>(<\/span>iter<\/span>.next<\/span>()<\/span>.unwrap<\/span>(),<\/span> &<\/span>[<\/span>2<\/span>,<\/span> 3<\/span>]);<\/span> \/\/ \u6b21\u306e\uff12\u3064<\/span>\r\nassert_eq!<\/span>(<\/span>iter<\/span>.next<\/span>()<\/span>.unwrap<\/span>(),<\/span> &<\/span>[<\/span>1<\/span>]);<\/span> \/\/ \u6b21\u306e\uff12\u3064...\u306f\u306a\u3044\u306e\u3067\u3001\uff11\u3064\u3060\u3051<\/span>\r\nassert<\/span>!<\/span>(<\/span>iter<\/span>.next<\/span>()<\/span>.is_none<\/span>());<\/span>\r\n<\/code><\/pre>\n
slice::chunks_exaxt – Rust
\nslice::rchunks – Rust
\nslice::chunks – Rust<\/p>\n
dbg! \u30de\u30af\u30ed \u2605\u2605\u2605\u2605\u2605<\/h2>\n
v1.32.0 \u301c<\/p>\n
\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u304c\u901a\u3089\u306a\u3044\u3068\u304d\u3001DP\u30c6\u30fc\u30d6\u30eb\u306e\u9014\u4e2d\u7d4c\u904e\u3092\u51fa\u529b\u3057\u3066\u3069\u3053\u304c\u30d0\u30b0\u3063\u3066\u3044\u308b\u306e\u304b\u3092\u78ba\u8a8d\u3057\u305f\u3044\u3001\u307f\u305f\u3044\u306a\u30b1\u30fc\u30b9\u306f\u3088\u304f\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u3002\u305d\u3046\u3044\u3046\u3068\u304d\u306b\u4eca\u307e\u3067\u3060\u3068 println!(“{:?}”, &dp); \u306a\u3069\u3068\u66f8\u304b\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u304b\u3063\u305f\u3068\u601d\u3044\u307e\u3059\u304c\u3001dbg! \u30de\u30af\u30ed\u306e\u767b\u5834\u306b\u3088\u3063\u3066\u98db\u8e8d\u7684\u306b\u697d\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
\u306a\u304a\u3001\u30ea\u30ea\u30fc\u30b9\u30d3\u30eb\u30c9\u3067\u3082\u666e\u901a\u306b\u52d5\u304d\u307e\u3059\u3002\u63d0\u51fa\u6642\u306b\u6d88\u3057\u5fd8\u308c\u3066\u3044\u308b\u3068 TLE\u306e\u539f\u56e0\u306b\u306a\u308b \u306e\u3067\u3001\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u5b89\u5b9a\u5316PR
\nStabilize dbg!(…) by Centril \u00b7 Pull Request #56395 \u00b7 rust-lang\/rust<\/p>\n
use<\/span> std<\/span>::<\/span>collections<\/span>::<\/span>HashMap<\/span>;<\/span>\r\nlet<\/span> v<\/span> =<\/span> vec!<\/span>[<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>];<\/span>\r\nlet<\/span> s<\/span> =<\/span> \"foo\"<\/span>;<\/span>\r\nlet<\/span> mut<\/span> map<\/span> =<\/span> HashMap<\/span>::<\/span>new<\/span>();<\/span>\r\nmap<\/span>.insert<\/span>(<\/span>\"hoge\"<\/span>,<\/span> 2<\/span>);<\/span>\r\nmap<\/span>.insert<\/span>(<\/span>\"fuga\"<\/span>,<\/span> 7<\/span>);<\/span>\r\n\r\ndbg!<\/span>(<\/span>&<\/span>v<\/span>,<\/span> s<\/span>,<\/span> &<\/span>map<\/span>);<\/span>\r\n\r\n\/* \u4ee5\u4e0b\u306e\u3088\u3046\u306b\u6a19\u6e96\u30a8\u30e9\u30fc\u51fa\u529b\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\r\n[src\/main.rs:9] &v = [\r\n    1,\r\n    2,\r\n    3,\r\n    4,\r\n]\r\n[src\/main.rs:9] s = \"foo\"\r\n[src\/main.rs:9] &map = {\r\n    \"fuga\": 7,\r\n    \"hoge\": 2,\r\n}\r\n*\/<\/span>\r\n<\/code><\/pre>\n
str::trim_start & str::trim_end \u2605\u2606\u2606\u2606\u2606<\/h2>\n
v1.30.0 \u301c<\/p>\n
\u6587\u5b57\u5217\u306e\u5148\u982d\u3001\u3042\u308b\u3044\u306f\u672b\u5c3e\u306b\u3042\u308b\u7a7a\u767d\u6587\u5b57\u3092\u53d6\u308a\u9664\u3044\u305f\u30b9\u30e9\u30a4\u30b9\u3092\u8fd4\u3057\u307e\u3059\u3002
\n\u3053\u3053\u3067\u3044\u3046\u7a7a\u767d\u6587\u5b57\u3068\u3044\u3046\u306e\u306f\u3001Unicode \u3067\u7a7a\u767d\u6587\u5b57\u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u3082\u306e\u3067\u3001<\/p>\n
    \n
  • \n
      https:\/\/www.unicode.org\/reports\/tr44\/<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        https:\/\/www.unicode.org\/Public\/UCD\/latest\/ucd\/PropList.txt<\/ul>\n
        \u3042\u305f\u308a\u306b\u7d30\u304b\u3044\u5b9a\u7fa9\u304c\u66f8\u304b\u308c\u3066\u3044\u308b\u3063\u307d\u3044\u306e\u3067\u3059\u304c\u3001\u57f7\u7b46\u6642\u73fe\u5728\u3001unicode.org \u306b\u969c\u5bb3\u304b\u4f55\u304b\u304c\u8d77\u304d\u3066\u3044\u308b\u3088\u3046\u3067\u3001\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n
        \u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u3063\u305fAPI\u2026\u2026\u3068\u3044\u3046\u308f\u3051\u3067\u306f\u306a\u304f\u3001\u5143\u304b\u3089\u3042\u3063\u305f\u30e1\u30bd\u30c3\u30c9 trim_left \u304a\u3088\u3073 trim_right \u304c\u975e\u63a8\u5968\u3068\u306a\u308a\u3001trim_start\u3001trim_end \u306b\u7f6e\u304d\u63db\u3048\u3089\u308c\u307e\u3057\u305f\u3002
        \n\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u3042\u308b\u901a\u308a\u3001\u6587\u7ae0\u304c\u66f8\u304b\u308c\u308b\u65b9\u5411\u306f\u8a00\u8a9e\u306b\u3088\u3063\u3066\u7570\u306a\u3063\u3066\u3001\u82f1\u8a9e\u3084\u65e5\u672c\u8a9e\u306f\u300c\u5de6\u304b\u3089\u53f3\u3078\u300d\u66f8\u304b\u308c\u308b\u306e\u306b\u5bfe\u3057\u3066\u3001\u30a2\u30e9\u30d3\u30a2\u8a9e\u306a\u3069\u306f\u300c\u53f3\u304b\u3089\u5de6\u3078\u300d\u66f8\u304b\u308c\u307e\u3059\u3002 \u30e1\u30bd\u30c3\u30c9\u540d\u3068\u3057\u3066 “start”, “end” \u3092\u4f7f\u3046\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3067\u8a00\u8a9e\u306b\u3088\u3089\u305a\u610f\u5473\u304c\u660e\u78ba\u306b\u306a\u308b\u3001\u3068\u3044\u3046\u3053\u3068\u3067API \u304c\u5909\u66f4\u3055\u308c\u305f\u5f62\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
        str::trim_start – Rust
        \nstr::trim_end – Rust<\/p>\n
        let<\/span> s<\/span> =<\/span> \"     Hello world   \"<\/span>;<\/span>\r\nprintln!<\/span>(<\/span>\"{}\"<\/span>,<\/span> s<\/span>.trim_start<\/span>());<\/span> \/\/ \"Hello world   \" \u304c\u51fa\u529b\u3055\u308c\u308b<\/span>\r\nprintln!<\/span>(<\/span>\"{}\"<\/span>,<\/span> s<\/span>.trim_end<\/span>());<\/span> \/\/ \"     Hello world\" \u304c\u51fa\u529b\u3055\u308c\u308b<\/span>\r\n<\/code><\/pre>\n
        slice::sort_by_cached_key \u2605\u2605\u2606\u2606\u2606<\/h2>\n
        v1.34.0 \u301c<\/p>\n
        slice::sort_by_key \u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308a\u3001\u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3059\u308b\u3068\u3001\u7d76\u5bfe\u5024\u306e\u6607\u9806\u306b\u30bd\u30fc\u30c8\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
        let<\/span> mut<\/span> v<\/span> =<\/span> [<\/span>-<\/span>5i32<\/span>,<\/span> 4<\/span>,<\/span> 1<\/span>,<\/span> -<\/span>3<\/span>,<\/span> 2<\/span>];<\/span>\r\nv<\/span>.sort_by_key<\/span>(|<\/span>k<\/span>|<\/span> k<\/span>.abs<\/span>());<\/span> \/\/ v \u306f [1, 2, -3, 4, -5] \u306b\u306a\u308b<\/span>\r\n<\/code><\/pre>\n
        \u3053\u3053\u3067\u306f\u30bd\u30fc\u30c8\u306b\u4f7f\u3046\u5024\u3092\u751f\u6210\u3059\u308b\u51e6\u7406\uff08key function \u3068\u547c\u3070\u308c\u307e\u3059\uff09\u304c k.abs() \u3068\u306a\u3063\u3066\u3044\u3066\u3001\u305d\u308c\u307b\u3069\u91cd\u3044\u51e6\u7406\u3067\u306f\u306a\u3055\u305d\u3046\u3067\u3059\u304c\u3001key function \u304c\u305d\u308c\u306a\u308a\u306b\u30b3\u30b9\u30c8\u306e\u304b\u304b\u308b\u51e6\u7406\u3092\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u3001\u3067\u304d\u308c\u3070\u5404\u8981\u7d20\u306b\u5bfe\u3057\u30661\u56de\u3060\u3051\u884c\u3044\u305f\u3044\u3067\u3059\u3002<\/p>\n
        \u305d\u3046\u3044\u3046\u3068\u304d\u306b slice::sort_by_cached_key \u3092\u4f7f\u3046\u3068\u826f\u3044\u3067\u3059\u3002key function \u304c\u3001\u5404\u8981\u7d20\u306b\u5bfe\u3057\u30661\u56de\u3057\u304b\u5b9f\u884c\u3055\u308c\u306a\u3044\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u3066\u3044\u307e\u3059\u3002
        \n\uff08\u9006\u306b\u3001 key function \u304c\u91cd\u305f\u3044\u51e6\u7406\u3067\u306a\u3044\u5834\u5408\u306f\u3001 sort_by_key \u306e\u307b\u3046\u304c\u9ad8\u901f\u3067\u3042\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u3001\u3068\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u3042\u308a\u307e\u3059\uff09<\/p>\n
        \u6700\u60aa\u6642\u9593\u8a08\u7b97\u91cf\u306f\u3001$n$ \u3092\u8981\u7d20\u6570\u3001$O(m)$ \u3092 key function \u306e\u6642\u9593\u8a08\u7b97\u91cf\u30aa\u30fc\u30c0\u30fc\u3068\u3057\u3066\u3001 $O(mn + n\\log n)$ \u3067\u3059\u3002
        \n\uff08sort_by_key \u3082\u540c\u3058\u30aa\u30fc\u30c0\u30fc\u3067\u3059\uff09<\/p>\n
        slice::sort_by_cached_key – Rust<\/p>\n
        let<\/span> mut<\/span> v<\/span> =<\/span> [<\/span>-<\/span>5i32<\/span>,<\/span> 4<\/span>,<\/span> 32<\/span>,<\/span> -<\/span>3<\/span>,<\/span> 2<\/span>];<\/span>\r\nv<\/span>.sort_by_cached_key<\/span>(|<\/span>k<\/span>|<\/span> k<\/span>.to_string<\/span>());<\/span> \/\/ v \u306f [-3, -5, 2, 32, 4] \u306b\u306a\u308b<\/span>\r\n<\/code><\/pre>\n
        Iterator::copied \u2605\u2605\u2605\u2606\u2606<\/h2>\n
        v1.36.0 \u301c<\/p>\n
        \u53c2\u7167\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u3063\u3066\u3001\u8981\u7d20\u306e\u578b\u304c &T \u306b\u306a\u3063\u3066\u3044\u3066\uff08\u305d\u308c\u306f\u305d\u3046\uff09\u3001\u5024\u305d\u306e\u3082\u306e\u3092\u4f7f\u3044\u305f\u3044\u3068\u304d\u306b & \u3084 * \u3092\u3064\u3051\u306a\u3044\u3068\u3044\u3051\u306a\u304f\u3066\u5c11\u3057\u9762\u5012\u3067\u3059\u3002
        \nIterator::copied \u3092\u4f7f\u3048\u3070\u3001 Copy \u30c8\u30ec\u30a4\u30c8\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308b T \u306b\u5bfe\u3057\u3066\u3001\u53c2\u7167\u304b\u3089\u30b3\u30d4\u30fc\u3092\u4f5c\u6210\u3057\u3066\u3001\u305d\u306e\u5f8c\u306f\u6240\u6709\u6a29\u3092\u3082\u3063\u305f\u5024\u3068\u3057\u3066\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
        \u4ee5\u4e0b\u306e\u30a8\u30f3\u30c8\u30ea\u304c\u5206\u304b\u308a\u3084\u3059\u304f\u3001\u307e\u305f\u4ed6\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u30e1\u30bd\u30c3\u30c9\u306b\u3064\u3044\u3066\u3082\u307e\u3068\u307e\u3063\u3066\u304a\u308a\u3001\u304a\u3059\u3059\u3081\u3067\u3059\u3002
        \nRust\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u7db2\u7f85\u7684\u304b\u3064\u5927\u96d1\u628a\u306a\u7d39\u4ecb – Qiita<\/p>\n
        std::iter::Iterator::copied – Rust<\/p>\n
        let<\/span> v<\/span> =<\/span> vec!<\/span>[<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>];<\/span>\r\n\r\nfor<\/span> a<\/span> in<\/span> v<\/span>.iter<\/span>()<\/span>.copied<\/span>()<\/span> {<\/span>\r\n    \/\/ a \u306b\u5bfe\u3059\u308b\u6240\u6709\u6a29\u304c\u3042\u308b<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> a<\/span>);<\/span> \/\/ 1 2 3 \u304c\u6539\u884c\u533a\u5207\u308a\u3067\u51fa\u529b\u3055\u308c\u308b<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        todo! \u30de\u30af\u30ed \u2605\u2605\u2605\u2605\u2606<\/h2>\n
        v.1.40.0 \u301c<\/p>\n
        unimplemented! \u3068\u3044\u3046\u30de\u30af\u30ed\u304c\u3082\u3068\u3082\u3068\u3042\u308a\u307e\u3057\u305f\u304c\u3001\u305d\u308c\u3068\u307b\u307c\u540c\u3058\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u3002\u6587\u5b57\u6570\u304c\u6e1b\u3063\u3066\u6253\u3061\u3084\u3059\u304f\u306a\u308a\u307e\u3057\u305f\u3002
        \n\u4f55\u304b\u306e\u51e6\u7406\u3092\u95a2\u6570\u306b\u5207\u308a\u51fa\u3059\u3068\u304d\u306b\u3001\u3068\u308a\u3042\u3048\u305a\u95a2\u6570\u306e\u578b\u30b7\u30b0\u30cd\u30c1\u30e3\u3060\u3051\u66f8\u3044\u3066\u304a\u3044\u3066\u3001\u5b9f\u88c5\u306f\u3042\u3068\u3067\u3084\u308b\uff01\u307f\u305f\u3044\u306a\u5834\u5408\u306b\u66f8\u3044\u3066\u304a\u304f\u3068\u4fbf\u5229\u3067\u3059\u3002<\/p>\n
        std::todo – Rust<\/p>\n
        fn<\/span> main<\/span>()<\/span> {<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> foo<\/span>());<\/span>\r\n}<\/span>\r\n\r\nfn<\/span> foo<\/span>()<\/span> -><\/span> String<\/span> {<\/span>\r\n    todo!<\/span>();<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        slice::repeat \u2605\u2605\u2606\u2606\u2606<\/h2>\n
        v1.40.0 \u301c<\/p>\n
        \u30b9\u30e9\u30a4\u30b9\u3092\u6307\u5b9a\u56de\u6570\u3060\u3051\u7e70\u308a\u8fd4\u3057\u305f\u30d9\u30af\u30bf\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u4f55\u304b\u4f7f\u3044\u3069\u3053\u308d\u3042\u308a\u305d\u3046\u3002<\/p>\n
        slice::repeat – Rust<\/p>\n
        let<\/span> v<\/span> =<\/span> [<\/span>1<\/span>,<\/span> 2<\/span>]<\/span>.repeat<\/span>(<\/span>3<\/span>);<\/span> \/\/ vec![1, 2, 1, 2, 1, 2] \u3068\u540c\u3058\u3082\u306e\u304c v \u306b\u675f\u7e1b\u3055\u308c\u308b<\/span>\r\n<\/code><\/pre>\n
        matches! \u30de\u30af\u30ed \u2605\u2605\u2605\u2606\u2606<\/h2>\n
        v1.42.0 \u301c<\/p>\n
        true, false \u3092\u8fd4\u3059\u3088\u3046\u306a match \u5f0f\u306e\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u30b7\u30e5\u30ac\u30fc\u3067\u3059\u3002
        \n\u4f8b\u3048\u3070\u3001 foo \u3068\u3044\u3046 Option \u578b\u306e\u5909\u6570\u304c\u3042\u3063\u3066\u3001 Some \u306b\u304f\u308b\u307e\u308c\u305f\u6574\u6570\u304c 2 \u4ee5\u4e0a \u306e\u3068\u304d\u3060\u3051\u4f55\u304b\u3057\u305f\u3044\u3001\u307f\u305f\u3044\u306a\u30b1\u30fc\u30b9\u306e\u3068\u304d\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u3051\u307e\u3059\u3002<\/p>\n
        let<\/span> foo<\/span>:<\/span> Option<\/span><<\/span>i32<\/span>><\/span> =<\/span> Some<\/span>(<\/span>3<\/span>);<\/span>\r\nif<\/span> matches!<\/span>(<\/span>foo<\/span>,<\/span> Some<\/span>(<\/span>x<\/span>)<\/span> if<\/span> x<\/span> >=<\/span> 2<\/span>)<\/span> {<\/span>\r\n    \/\/ \u4f55\u3089\u304b\u306e\u51e6\u7406<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        \u7b2c\u4e00\u5f15\u6570\u306b\u5909\u6570\u3092\u3001\u7b2c2\u5f15\u6570\u306b\u30d1\u30bf\u30fc\u30f3\u3092\u6e21\u3059\u5f62\u3067\u3059\u3002
        \n\u30d1\u30bf\u30fc\u30f3\u306b\u3064\u3044\u3066\u306f
        \nRust\u306e\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u3092\u5b8c\u5168\u306b\u7406\u89e3\u3057\u305f | FrozenLib
        \n\u306b\u3068\u3066\u3082\u308f\u304b\u308a\u3084\u3059\u304f\u307e\u3068\u3081\u3089\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u305c\u3072\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/p>\n
        \u540c\u3058\u304f v1.42.0 \u3067\u30b9\u30e9\u30a4\u30b9\u306b\u5bfe\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u304c\u5f37\u5316\u3055\u308c\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u305f\u3081\u3001 matches! \u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u5f37\u529b\u2026\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n
        fn<\/span> foo<\/span>(<\/span>words<\/span>:<\/span> &<\/span>[<\/span>&<\/span>str<\/span>])<\/span> {<\/span>\r\n    match<\/span> words<\/span> {<\/span>\r\n        [<\/span>\"Hello\"<\/span>,<\/span> \"World\"<\/span>,<\/span> \"!\"<\/span>,<\/span> ..<\/span>]<\/span> =><\/span> println!<\/span>(<\/span>\"Hello World!\"<\/span>),<\/span>\r\n        [<\/span>\"Foo\"<\/span>,<\/span> \"Bar\"<\/span>,<\/span> ..<\/span>]<\/span> =><\/span> println!<\/span>(<\/span>\"Baz\"<\/span>),<\/span>\r\n        rest<\/span> =><\/span> println!<\/span>(<\/span>\"{:?}\"<\/span>,<\/span> rest<\/span>),<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        \u3053\u3061\u3089\u3082\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\u3002
        \nRust 1.42\u3092\u65e9\u3081\u306b\u6df1\u6398\u308a – OPTiM TECH BLOG<\/p>\n
        \u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u5916\u90e8\u30af\u30ec\u30fc\u30c8\u306b\u95a2\u3057\u3066<\/h1>\n
        \u3053\u3053\u307e\u3067\u3001\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u8ffd\u52a0\u3055\u308c\u305f\u6a5f\u80fd\u306e\u3046\u3061\u7af6\u30d7\u30ed\u7684\u306b\u4f7f\u3044\u307f\u3061\u306e\u3042\u308a\u305d\u3046\u306a\u3082\u306e\u3092\u7d39\u4ecb\u3057\u3066\u304d\u307e\u3057\u305f\u304c\u3001AtCoder \u306e\u65b0\u30b8\u30e3\u30c3\u30b8\u30b7\u30b9\u30c6\u30e0\u5c0e\u5165\u306b\u4f34\u3063\u3066\u3001\u3055\u307e\u3056\u307e\u306a\u5916\u90e8\u30af\u30ec\u30fc\u30c8\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002
        \nRust \u306f\u8a00\u8a9e\u306e\u65b9\u91dd\u3068\u3057\u3066\u300cBatteries included (\u30d0\u30c3\u30c6\u30ea\u30fc\u540c\u68b1)\u300d \u306b\u306a\u308b\u3053\u3068\u3092\u907f\u3051\u3066\u3044\u307e\u3059\u3002
        \n\u300c\u30d0\u30c3\u30c6\u30ea\u30fc\u540c\u68b1\u300d\u306f\u7279\u306b Python \u306e\u7279\u9577\u306e1\u3064\u3068\u3057\u3066\u3088\u304f\u6319\u3052\u3089\u308c\u3001\u300c\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u3042\u308c\u3070\u306a\u3093\u3067\u3082\u3067\u304d\u308b\u300d\u306e\u3088\u3046\u306a\u30cb\u30e5\u30a2\u30f3\u30b9\u3067\u3059\u3002
        \nRust \u304c\u3069\u308c\u307b\u3069\u300c\u30d0\u30c3\u30c6\u30ea\u30fc\u540c\u68b1\u300d\u3092\u907f\u3051\u3066\u3044\u308b\u306e\u304b\u3068\u3044\u3046\u3068\u3001\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u7591\u4f3c\u4e71\u6570\u751f\u6210\u3084\u6b63\u898f\u8868\u73fe\u3092\u6271\u3046\u6a5f\u80fd\u3059\u3089\u7528\u610f\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3044\u3063\u305f\u5fb9\u5e95\u5177\u5408\u3067\u3059\u3002<\/p>\n
        \u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u3042\u3089\u3086\u308b\u51e6\u7406\u3092\u30ab\u30d0\u30fc\u3057\u3066\u3044\u308b\u306e\u306f\u78ba\u304b\u306b\u4fbf\u5229\u3067\u3059\u304c\u3001\u8a00\u8a9e\u306e\u30b3\u30a2\u306b\u95a2\u308f\u3089\u306a\u3044\u3088\u3046\u306a\u6a5f\u80fd\u3082\u8a00\u8a9e\u306e\u30ea\u30ea\u30fc\u30b9\u3068\u540c\u3058\u30b5\u30a4\u30af\u30eb\u3067\u306e\u958b\u767a\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u3053\u3068\u3084\u3001\u8a00\u8a9e\u305d\u306e\u3082\u306e\u306b\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3057\u307e\u3046\u3068\u7834\u58ca\u7684\u5909\u66f4\u3092\u4f34\u3046\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u304c\u6975\u3081\u3066\u96e3\u3057\u304f\u306a\u308b\u3053\u3068\u306a\u3069\u3001\u8a00\u8a9e\u306e\u767a\u5c55\u3068\u3044\u3046\u89b3\u70b9\u304b\u3089\u3059\u308b\u3068\u559c\u3070\u3057\u304f\u306a\u3044\u70b9\u3082\u591a\u3044\u3067\u3059\u3002
        \nRust \u306b\u306f Cargo \u3068\u3044\u3046\u7d20\u6674\u3089\u3057\u3044\u30d1\u30c3\u30b1\u30fc\u30b8\u30de\u30cd\u30fc\u30b8\u30e3\u304c\u3042\u308a\u3001\u5916\u90e8\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u304b\u3093\u305f\u3093\u306b\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
        \n\u4ee5\u4e0a\u306e\u3088\u3046\u306a\u7406\u7531\u304b\u3089 Rust \u306f\u30d0\u30c3\u30c6\u30ea\u30fc\u3092\u540c\u68b1\u3057\u306a\u3044\u3068\u3044\u3046\u65b9\u91dd\u3092\u3068\u3063\u3066\u3044\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n
        \u524d\u7f6e\u304d\u304c\u9577\u304f\u306a\u308a\u307e\u3057\u305f\u304c\u3001AtCoder \u65b0\u30b8\u30e3\u30c3\u30b8\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u4ee5\u4e0b\u306e\u30af\u30ec\u30fc\u30c8\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002Rust \u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u306e\u5145\u5b9f\u5177\u5408\u3092\u907a\u61be\u306a\u304f\u7af6\u6280\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u6d3b\u304b\u305b\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3068\u3044\u3046\u611f\u3058\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
        [dependencies]<\/span>\r\nnum<\/span> =<\/span> \"0.2.1\"<\/span>\r\nnum-bigint<\/span> =<\/span> \"0.2.6\"<\/span>\r\nnum-complex<\/span> =<\/span> \"0.2.4\"<\/span>\r\nnum-integer<\/span> =<\/span> \"0.1.42\"<\/span>\r\nnum-iter<\/span> =<\/span> \"0.1.40\"<\/span>\r\nnum-rational<\/span> =<\/span> \"0.2.4\"<\/span>\r\nnum-traits<\/span> =<\/span> \"0.2.11\"<\/span>\r\nnum-derive<\/span> =<\/span> \"0.3.0\"<\/span>\r\nndarray<\/span> =<\/span> \"0.13.0\"<\/span>\r\nnalgebra<\/span> =<\/span> \"0.20.0\"<\/span>\r\nalga<\/span> =<\/span> \"0.9.3\"<\/span>\r\nlibm<\/span> =<\/span> \"0.2.1\"<\/span>\r\nrand<\/span> =<\/span> {<\/span> version<\/span> =<\/span> \"0.7.3\"<\/span>,<\/span> features<\/span> =<\/span> [\"small_rng\"]<\/span> }<\/span>\r\ngetrandom<\/span> =<\/span> \"0.1.14\"<\/span>\r\nrand_chacha<\/span> =<\/span> \"0.2.2\"<\/span>\r\nrand_core<\/span> =<\/span> \"0.5.1\"<\/span>\r\nrand_hc<\/span> =<\/span> \"0.2.0\"<\/span>\r\nrand_pcg<\/span> =<\/span> \"0.2.1\"<\/span>\r\nrand_distr<\/span> =<\/span> \"0.2.2\"<\/span>\r\npetgraph<\/span> =<\/span> \"0.5.0\"<\/span>\r\nindexmap<\/span> =<\/span> \"1.3.2\"<\/span>\r\nregex<\/span> =<\/span> \"1.3.6\"<\/span>\r\nlazy_static<\/span> =<\/span> \"1.4.0\"<\/span>\r\nordered-float<\/span> =<\/span> \"1.0.2\"<\/span>\r\nascii<\/span> =<\/span> \"1.0.0\"<\/span>\r\npermutohedron<\/span> =<\/span> \"0.2.4\"<\/span>\r\nsuperslice<\/span> =<\/span> \"1.0.0\"<\/span>\r\nitertools<\/span> =<\/span> \"0.9.0\"<\/span>\r\nitertools-num<\/span> =<\/span> \"0.1.3\"<\/span>\r\nmaplit<\/span> =<\/span> \"1.0.2\"<\/span>\r\neither<\/span> =<\/span> \"1.5.3\"<\/span>\r\nim-rc<\/span> =<\/span> \"14.3.0\"<\/span>\r\nfixedbitset<\/span> =<\/span> \"0.2.0\"<\/span>\r\nbitset-fixed<\/span> =<\/span> \"0.1.0\"<\/span>\r\nproconio<\/span> =<\/span> {<\/span> version<\/span> =<\/span> \"0.3.6\"<\/span>,<\/span> features<\/span> =<\/span> [\"derive\"]<\/span> }<\/span>\r\ntext_io<\/span> =<\/span> \"0.1.8\"<\/span>\r\nwhiteread<\/span> =<\/span> \"0.5.0\"<\/span>\r\nrustc-hash<\/span> =<\/span> \"1.1.0\"<\/span>\r\nsmallvec<\/span> =<\/span> \"1.2.0\"<\/span>\r\n<\/code><\/pre>\n
        \u3053\u308c\u3089\u306e\u30af\u30ec\u30fc\u30c8\u306e\u7528\u9014\u3068\u5b9f\u969b\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u306f\u3001<\/p>\n
          AtCoder 2020\u5e74\u8a00\u8a9e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u4ee5\u964d\u306e\u74b0\u5883<\/ul>\n
          \u306b\u3068\u3066\u3082\u8a73\u3057\u304f\u307e\u3068\u307e\u3063\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\uff01<\/p>\n
          \u307e\u3068\u3081<\/h1>\n
            \n
          • \n
              AtCoder \u30b8\u30e3\u30c3\u30b8\u30b7\u30b9\u30c6\u30e0\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u3001Rust \u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u4f7f\u3048\u308b\u6a5f\u80fd\u304c\u5897\u3048\u3066\u3001\u4fbf\u5229\u306b\u306a\u308a\u307e\u3057\u305f\uff01<\/ul>\n<\/li>\n<\/ul>\n
               <\/p>\n
                \u5916\u90e8\u30af\u30ec\u30fc\u30c8\u3082\u305f\u304f\u3055\u3093\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3001Rust \u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u306e\u771f\u306e\u529b\uff08\uff1f\uff09\u3092\u7af6\u30d7\u30ed\u3067\u767a\u63ee\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f<\/ul>\n
                \u629c\u3051\u6f0f\u308c\u7b49\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u306e\u3067\u3001\u4f55\u304b\u4ed6\u306b\u65b0\u30b8\u30e3\u30c3\u30b8\u30b7\u30b9\u30c6\u30e0\u3067\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u4fbf\u5229\u6a5f\u80fd\u3092\u3054\u5b58\u77e5\u306e\u65b9\u3044\u3089\u3063\u3057\u3083\u3044\u307e\u3057\u305f\u3089\u3001\u305c\u3072\u30b3\u30e1\u30f3\u30c8\u304f\u3060\u3055\u3044?<\/p>\n
                (2020\/04\/27 \u8ffd\u8a18)
                \n@qryxip \u3055\u3093\u306b\u3088\u308b\u4ee5\u4e0b\u306e\u307e\u3068\u3081\u3082\u3068\u3066\u3082\u308f\u304b\u308a\u3084\u3059\u304f\u3001\u305d\u3057\u3066\u50d5\u306e\u3082\u306e\u3088\u308a\u3082\u7db2\u7f85\u6027\u304c\u9ad8\u3044\u305f\u3081\u305c\u3072\u3054\u89a7\u304f\u3060\u3055\u3044\u3002
                \n\u7af6\u6280\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3068\u3044\u3046\u6587\u8108\u306b\u9650\u3089\u305a\u3001Rust \u3067\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3059\u308b\u4e0a\u3067\u77e5\u8b58\u3068\u3057\u3066\u6301\u3063\u3066\u304a\u304f\u3068\u826f\u3044\u60c5\u5831\u304c\u307e\u3068\u307e\u3063\u3066\u304a\u308a\u3001\u304a\u3059\u3059\u3081\u3067\u3059\uff01
                \n@qryxip \u3055\u3093\u306b\u3088\u308b Rust1.42.0 \u307e\u3068\u3081 rust-1-42.md<\/p>\n
                References<\/h1>\n
                  \n
                • \n
                    Rust \u30ea\u30ea\u30fc\u30b9\u30ce\u30fc\u30c8<\/ul>\n<\/li>\n<\/ul>\n
                     <\/p>\n
                      \n
                    • \n
                        Rust\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u7db2\u7f85\u7684\u304b\u3064\u5927\u96d1\u628a\u306a\u7d39\u4ecb – Qiita<\/ul>\n<\/li>\n<\/ul>\n
                         <\/p>\n
                          \n
                        • \n
                            Rust 1.42\u3092\u65e9\u3081\u306b\u6df1\u6398\u308a – OPTiM TECH BLOG<\/ul>\n<\/li>\n<\/ul>\n
                             <\/p>\n
                              \n
                            • \n
                                The Rust Libz Blitz | Rust Blog<\/ul>\n<\/li>\n<\/ul>\n
                                 <\/p>\n
                                  \n
                                • \n
                                    \u306f\u3058\u3081\u306b – AtCoder\u30b3\u30f3\u30c6\u30b9\u30c8\u306bRust\u3067\u53c2\u52a0\u3059\u308b\u305f\u3081\u306e\u30ac\u30a4\u30c9\u30d6\u30c3\u30af<\/ul>\n<\/li>\n<\/ul>\n
                                     <\/p>\n
                                      2020 Update \u00b7 rust-lang-ja\/atcoder-rust-resources Wiki<\/ul>\n","protected":false},"excerpt":{"rendered":"
                                      \u7af6\u30d7\u30eder\u306e\u307f\u306a\u3055\u3093\u3001\u3053\u3093\u306b\u3061\u306f\u3002 AtCoder \u306b\u3066\u3064\u3044\u306b\u5168\u30e6\u30fc\u30b6\u30fc\u5f85\u671b\u306e\u30b8\u30e3\u30c3\u30b8\u30b7\u30b9\u30c6\u30e0\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u304c\u5b9f […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45297","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\/45297-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u7af6\u30d7\u30eder\u306e\u307f\u306a\u3055\u3093\u3001\u3053\u3093\u306b\u3061\u306f\u3002 AtCoder \u306b\u3066\u3064\u3044\u306b\u5168\u30e6\u30fc\u30b6\u30fc\u5f85\u671b\u306e\u30b8\u30e3\u30c3\u30b8\u30b7\u30b9\u30c6\u30e0\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u304c\u5b9f […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45297-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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