{"id":2163,"date":"2025-03-24T08:48:08","date_gmt":"2025-03-23T23:48:08","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=2163"},"modified":"2025-03-24T08:48:33","modified_gmt":"2025-03-23T23:48:33","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%e3%80%91stdvector%e3%81%ae%e5%88%9d%e6%9c%9f%e5%8c%96%e6%96%b9%e6%b3%95%e3%81%a8%e5%ae%9f%e8%b7%b5%e7%9a%84%e3%81%aa%e4%bd%bf%e3%81%84%e6%96%b9","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=2163","title":{"rendered":"\u3010\u5b8c\u5168\u30ac\u30a4\u30c9\u3011std::vector\u306e\u521d\u671f\u5316\u65b9\u6cd5\u3068\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b912\u9078 &#8211; \u30e1\u30e2\u30ea\u52b9\u7387\u304b\u3089\u6700\u9069\u5316\u306e\u30b3\u30c4\u307e\u3067"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">std::vector\u3068\u306f\uff1f\u521d\u671f\u5316\u306e\u91cd\u8981\u6027\u3092\u7406\u89e3\u3059\u308b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u53ef\u5909\u9577\u914d\u5217\u3068\u3057\u3066\u306evector\u306e\u7279\u5fb4\u3068\u5229\u70b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">\u9069\u5207\u306a\u521d\u671f\u5316\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u4e0e\u3048\u308b\u5f71\u97ff<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">\u57fa\u672c\u7684\u306avector\u306e\u521d\u671f\u5316\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">\u7a7a\u306evector\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5\u3068\u4f7f\u3044\u3069\u3053\u308d<\/a>      <\/li>      <li>        <a href=\"#i-5\">\u30b5\u30a4\u30ba\u3068\u521d\u671f\u5024\u3092\u6307\u5b9a\u3057\u305f\u521d\u671f\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-6\">\u4ed6\u306e\u30b3\u30f3\u30c6\u30ca\u304b\u3089vector\u3092\u521d\u671f\u5316\u3059\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-7\">\u30e2\u30c0\u30f3C++\u3067\u63a8\u5968\u3055\u308c\u308bvector\u521d\u671f\u5316\u30d1\u30bf\u30fc\u30f3<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-8\">\u7d71\u4e00\u521d\u671f\u5316\u69cb\u6587\u306b\u3088\u308b\u5b89\u5168\u306a\u521d\u671f\u5316\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-9\">\u521d\u671f\u5316\u5b50\u30ea\u30b9\u30c8\u3092\u4f7f\u7528\u3057\u305f\u67d4\u8edf\u306a\u521d\u671f\u5316<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-10\">\u30e0\u30fc\u30d6\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9\u3092\u6d3b\u7528\u3057\u305f\u52b9\u7387\u7684\u306a\u521d\u671f\u5316<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-11\">\u5b9f\u52d9\u3067\u4f7f\u3048\u308b\u9ad8\u5ea6\u306avector\u521d\u671f\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-12\">\u30e1\u30e2\u30ea\u4e88\u7d04\u306b\u3088\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/a>      <\/li>      <li>        <a href=\"#i-13\">\u30ab\u30b9\u30bf\u30e0\u30a2\u30ed\u30b1\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u305f\u7279\u6b8a\u306a\u521d\u671f\u5316<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-14\">\u4e26\u5217\u51e6\u7406\u3092\u8003\u616e\u3057\u305fvector\u306e\u521d\u671f\u5316\u6226\u7565<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-15\">\u3088\u304f\u3042\u308bvector\u521d\u671f\u5316\u306e\u843d\u3068\u3057\u7a74\u3068\u5bfe\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-16\">\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u305f\u3081\u306e\u521d\u671f\u5316\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-17\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u56de\u907f\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-18\">\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-19\">\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u4f7f\u7528\u3055\u308c\u308b\u521d\u671f\u5316\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-20\">\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u6307\u6458\u3055\u308c\u3084\u3059\u3044\u521d\u671f\u5316\u306e\u554f\u984c\u70b9<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">std::vector\u3068\u306f\uff1f\u521d\u671f\u5316\u306e\u91cd\u8981\u6027\u3092\u7406\u89e3\u3059\u308b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u53ef\u5909\u9577\u914d\u5217\u3068\u3057\u3066\u306evector\u306e\u7279\u5fb4\u3068\u5229\u70b9<\/h3>\n\n\n\n<p>std::vector\u306f\u3001C++\u6a19\u6e96\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e9\u30a4\u30d6\u30e9\u30ea\uff08STL\uff09\u304c\u63d0\u4f9b\u3059\u308b\u6700\u3082\u57fa\u672c\u7684\u304b\u3064\u91cd\u8981\u306a\u30b3\u30f3\u30c6\u30ca\u306e\u4e00\u3064\u3067\u3059\u3002<br>\u4ee5\u4e0b\u306e\u7279\u5fb4\u306b\u3088\u308a\u3001\u591a\u304f\u306eC++\u30d7\u30ed\u30b0\u30e9\u30de\u304b\u3089\u91cd\u5b9d\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u52d5\u7684\u306a\u30e1\u30e2\u30ea\u7ba1\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8981\u7d20\u6570\u3092\u5b9f\u884c\u6642\u306b\u5909\u66f4\u53ef\u80fd<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u306e\u81ea\u52d5\u78ba\u4fdd\u30fb\u89e3\u653e<\/li>\n\n\n\n<li>\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u306e\u3088\u3046\u306a\u5b89\u5168\u6027<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u9023\u7d9a\u3057\u305f\u30e1\u30e2\u30ea\u9818\u57df<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9ad8\u901f\u306a\u30e9\u30f3\u30c0\u30e0\u30a2\u30af\u30bb\u30b9\uff08O(1)\u306e\u6642\u9593\u8907\u96d1\u5ea6\uff09<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u306a\u8a2d\u8a08<\/li>\n\n\n\n<li>\u914d\u5217\u306e\u3088\u3046\u306a\u76f4\u611f\u7684\u306a\u64cd\u4f5c<\/li>\n<\/ul>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u57fa\u672c\u7684\u306a\u64cd\u4f5c\u304c\u53ef\u80fd\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ vector\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u4f8b\nstd::vector&lt;int&gt; numbers;        \/\/ \u7a7a\u306evector\u4f5c\u6210\nnumbers.push_back(1);           \/\/ \u672b\u5c3e\u306b\u8981\u7d20\u3092\u8ffd\u52a0\nnumbers.push_back(2);\nstd::cout &lt;&lt; numbers[0];        \/\/ \u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u9069\u5207\u306a\u521d\u671f\u5316\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u4e0e\u3048\u308b\u5f71\u97ff<\/h3>\n\n\n\n<p>vector\u306e\u521d\u671f\u5316\u65b9\u6cd5\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u91cd\u5927\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\uff1a<\/p>\n\n\n\n<p><strong>1. \u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\u306e\u6700\u5c0f\u5316<\/strong><br>\u9069\u5207\u306a\u521d\u671f\u5316\u306b\u3088\u308a\u3001\u4ee5\u4e0b\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u554f\u984c\u3092\u56de\u907f\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8981\u7d20\u8ffd\u52a0\u6642\u306e\u983b\u7e41\u306a\u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u30b3\u30d4\u30fc\u64cd\u4f5c<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u30d5\u30e9\u30b0\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u60aa\u3044\u4f8b\uff1a\u983b\u7e41\u306a\u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\u304c\u767a\u751f\nstd::vector&lt;int&gt; vec;\nfor (int i = 0; i &lt; 10000; ++i) {\n    vec.push_back(i);  \/\/ \u591a\u6570\u56de\u306e\u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\n}\n\n\/\/ \u826f\u3044\u4f8b\uff1a\u4e8b\u524d\u306b\u30e1\u30e2\u30ea\u3092\u78ba\u4fdd\nstd::vector&lt;int&gt; vec;\nvec.reserve(10000);    \/\/ \u4e00\u5ea6\u306e\u30e1\u30e2\u30ea\u78ba\u4fdd\nfor (int i = 0; i &lt; 10000; ++i) {\n    vec.push_back(i);  \/\/ \u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\u4e0d\u8981\n}<\/pre>\n\n\n\n<p><strong>2. \u521d\u671f\u5316\u30b3\u30b9\u30c8\u306e\u6700\u9069\u5316<\/strong><br>\u521d\u671f\u5316\u65b9\u6cd5\u306b\u3088\u3063\u3066\u3001\u4ee5\u4e0b\u306e\u8981\u7d20\u304c\u5909\u5316\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u521d\u671f\u5316\u6642\u306e\u5b9f\u884c\u6642\u9593<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u4e00\u6642\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u751f\u6210<\/li>\n<\/ul>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\u8868\uff1a<\/p>\n\n\n<div id=\"id-053ba22d-1334-439f-a0f9-ef3c57e26f09\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u521d\u671f\u5316\u65b9\u6cd5<\/th><th>\u30e1\u30e2\u30ea\u52b9\u7387<\/th><th>\u5b9f\u884c\u901f\u5ea6<\/th><th>\u4f7f\u7528\u30b7\u30fc\u30f3<\/th><\/tr><\/thead><tbody><tr><td>\u30c7\u30d5\u30a9\u30eb\u30c8\u69cb\u7bc9<\/td><td>\u6700\u5c0f<\/td><td>\u6700\u901f<\/td><td>\u30b5\u30a4\u30ba\u672a\u5b9a\u306e\u5834\u5408<\/td><\/tr><tr><td>\u30b5\u30a4\u30ba\u6307\u5b9a<\/td><td>\u4e2d<\/td><td>\u4e2d<\/td><td>\u30b5\u30a4\u30ba\u65e2\u77e5\u306e\u5834\u5408<\/td><\/tr><tr><td>\u521d\u671f\u5024\u6307\u5b9a<\/td><td>\u5927<\/td><td>\u4f4e\u901f<\/td><td>\u5168\u8981\u7d20\u540c\u5024\u306e\u5834\u5408<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p><strong>3. \u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u52b9\u7387\u5316<\/strong><br>\u9069\u5207\u306a\u521d\u671f\u5316\u306b\u3088\u308a\u3001\u4ee5\u4e0b\u306e\u5229\u70b9\u304c\u5f97\u3089\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u9632\u6b62<\/li>\n\n\n\n<li>\u4f8b\u5916\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/li>\n\n\n\n<li>\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e\u7c21\u7d20\u5316<\/li>\n<\/ul>\n\n\n\n<p>\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5fc5\u8981\u306a\u30b5\u30a4\u30ba\u304c\u5206\u304b\u3063\u3066\u3044\u308b\u5834\u5408\u306f\u3001<code>reserve()<\/code>\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u30b3\u30d4\u30fc\u3092\u907f\u3051\u308b\u305f\u3081\u3001\u30e0\u30fc\u30d6\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9\u3092\u6d3b\u7528<\/li>\n\n\n\n<li>\u521d\u671f\u5316\u65b9\u6cd5\u306f\u4f7f\u7528\u30b1\u30fc\u30b9\u306b\u5fdc\u3058\u3066\u9069\u5207\u306b\u9078\u629e<\/li>\n<\/ul>\n\n\n\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6982\u5ff5\u3092\u8e0f\u307e\u3048\u305f\u4e0a\u3067\u3001\u5177\u4f53\u7684\u306a\u521d\u671f\u5316\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">\u57fa\u672c\u7684\u306avector\u306e\u521d\u671f\u5316\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u7a7a\u306evector\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5\u3068\u4f7f\u3044\u3069\u3053\u308d<\/h3>\n\n\n\n<p>\u7a7a\u306evector\u306e\u521d\u671f\u5316\u306f\u3001\u8981\u7d20\u6570\u304c\u5b9f\u884c\u6642\u306b\u6c7a\u5b9a\u3055\u308c\u308b\u5834\u5408\u3084\u3001\u52d5\u7684\u306b\u30c7\u30fc\u30bf\u3092\u8ffd\u52a0\u3057\u3066\u3044\u304f\u5834\u5408\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u4f7f\u7528\nstd::vector&lt;int&gt; vec1;\n\n\/\/ 2. \u660e\u793a\u7684\u306a\u7a7a\u306e\u521d\u671f\u5316\nstd::vector&lt;int&gt; vec2 = {};\n\n\/\/ 3. \u7d71\u4e00\u521d\u671f\u5316\u69cb\u6587\nstd::vector&lt;int&gt; vec3{};\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u578b\u3067\u306e\u4f7f\u7528\u4f8b\nclass MyClass {\n    \/\/ \u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u30fc\u5b9a\u7fa9\n};\nstd::vector&lt;MyClass&gt; objects;  \/\/ \u30ab\u30b9\u30bf\u30e0\u30af\u30e9\u30b9\u306evector<\/pre>\n\n\n\n<p>\u4f7f\u7528\u30b7\u30fc\u30f3\u5225\u306e\u63a8\u5968\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u53ce\u96c6\u6642\uff1a<code>vec1<\/code>\u65b9\u5f0f<\/li>\n\n\n\n<li>\u30af\u30e9\u30b9\u30e1\u30f3\u30d0\u5909\u6570\uff1a<code>vec2<\/code>\u65b9\u5f0f<\/li>\n\n\n\n<li>\u30e2\u30c0\u30f3C++\u3067\u306e\u4e00\u822c\u7684\u306a\u4f7f\u7528\uff1a<code>vec3<\/code>\u65b9\u5f0f<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u30b5\u30a4\u30ba\u3068\u521d\u671f\u5024\u3092\u6307\u5b9a\u3057\u305f\u521d\u671f\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u30b5\u30a4\u30ba\u3068\u521d\u671f\u5024\u3092\u6307\u5b9a\u3059\u308b\u521d\u671f\u5316\u306f\u3001\u914d\u5217\u306e\u30b5\u30a4\u30ba\u304c\u65e2\u77e5\u3067\u3001\u7279\u5b9a\u306e\u5024\u3067\u521d\u671f\u5316\u3057\u305f\u3044\u5834\u5408\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u30b5\u30a4\u30ba\u306e\u307f\u6307\u5b9a\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3067\u521d\u671f\u5316\uff09\nstd::vector&lt;int&gt; vec1(5);  \/\/ [0, 0, 0, 0, 0]\n\n\/\/ 2. \u30b5\u30a4\u30ba\u3068\u5024\u3092\u6307\u5b9a\nstd::vector&lt;int&gt; vec2(3, 100);  \/\/ [100, 100, 100]\n\n\/\/ 3. fill\u3092\u4f7f\u7528\u3057\u305f\u521d\u671f\u5316\u5f8c\u306e\u5024\u8a2d\u5b9a\nstd::vector&lt;double&gt; vec3(5);\nstd::fill(vec3.begin(), vec3.end(), 3.14);  \/\/ [3.14, 3.14, 3.14, 3.14, 3.14]\n\n\/\/ 4. iota \u3092\u4f7f\u7528\u3057\u305f\u9023\u7d9a\u5024\u3067\u306e\u521d\u671f\u5316\nstd::vector&lt;int&gt; vec4(5);\nstd::iota(vec4.begin(), vec4.end(), 0);  \/\/ [0, 1, 2, 3, 4]<\/pre>\n\n\n\n<p>\u521d\u671f\u5316\u30d1\u30bf\u30fc\u30f3\u306e\u4f7f\u3044\u5206\u3051\uff1a<\/p>\n\n\n<div id=\"id-01184e71-c531-4e0d-a106-bb0d3ad78d57\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30d1\u30bf\u30fc\u30f3<\/th><th>\u30e1\u30ea\u30c3\u30c8<\/th><th>\u30c7\u30e1\u30ea\u30c3\u30c8<\/th><th>\u9069\u7528\u30b7\u30fc\u30f3<\/th><\/tr><\/thead><tbody><tr><td>\u30c7\u30d5\u30a9\u30eb\u30c8\u5024<\/td><td>\u9ad8\u901f<\/td><td>\u5024\u306e\u5236\u5fa1\u4e0d\u53ef<\/td><td>\u6570\u5024\u578b\u914d\u5217<\/td><\/tr><tr><td>\u6307\u5b9a\u5024<\/td><td>\u78ba\u5b9f<\/td><td>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u5927<\/td><td>\u56fa\u5b9a\u5024\u914d\u5217<\/td><\/tr><tr><td>fill<\/td><td>\u67d4\u8edf<\/td><td>\u8ffd\u52a0\u51e6\u7406\u5fc5\u8981<\/td><td>\u5f8c\u304b\u3089\u5024\u8a2d\u5b9a<\/td><\/tr><tr><td>iota<\/td><td>\u9023\u756a\u751f\u6210\u304c\u5bb9\u6613<\/td><td>\u7528\u9014\u9650\u5b9a\u7684<\/td><td>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u4ed6\u306e\u30b3\u30f3\u30c6\u30ca\u304b\u3089vector\u3092\u521d\u671f\u5316\u3059\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u65e2\u5b58\u306e\u30b3\u30f3\u30c6\u30ca\u3084\u30c7\u30fc\u30bf\u69cb\u9020\u304b\u3089vector\u3092\u521d\u671f\u5316\u3059\u308b\u5834\u5408\u306e\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u914d\u5217\u304b\u3089\u306e\u521d\u671f\u5316\nint arr[] = {1, 2, 3, 4, 5};\nstd::vector&lt;int&gt; vec1(arr, arr + sizeof(arr)\/sizeof(arr[0]));\n\n\/\/ 2. \u4ed6\u306evector\u304b\u3089\u306e\u30b3\u30d4\u30fc\u521d\u671f\u5316\nstd::vector&lt;int&gt; vec2 = vec1;  \/\/ \u30b3\u30d4\u30fc\u69cb\u7bc9\n\n\/\/ 3. \u90e8\u5206\u7bc4\u56f2\u304b\u3089\u306e\u521d\u671f\u5316\nstd::vector&lt;int&gt; vec3(vec1.begin() + 1, vec1.begin() + 4);  \/\/ [2, 3, 4]\n\n\/\/ 4. \u30ea\u30b9\u30c8\u304b\u3089\u306e\u521d\u671f\u5316\nstd::list&lt;int&gt; list = {1, 2, 3, 4, 5};\nstd::vector&lt;int&gt; vec4(list.begin(), list.end());\n\n\/\/ 5. \u30e0\u30fc\u30d6\u69cb\u7bc9\u306b\u3088\u308b\u52b9\u7387\u7684\u306a\u521d\u671f\u5316\nstd::vector&lt;int&gt; vec5 = std::move(vec1);  \/\/ vec1\u306e\u5185\u5bb9\u3092\u79fb\u52d5<\/pre>\n\n\n\n<p>\u30b3\u30f3\u30c6\u30ca\u5909\u63db\u6642\u306e\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u7bc4\u56f2\u30c1\u30a7\u30c3\u30af<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u52b9\u7387\u306e\u8003\u616e<\/li>\n\n\n\n<li>\u4f8b\u5916\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/li>\n<\/ul>\n\n\n\n<p>\u6027\u80fd\u6700\u9069\u5316\u306e\u305f\u3081\u306e\u30d2\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u4e88\u7d04\u306e\u6d3b\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::vector&lt;int&gt; vec;\nvec.reserve(list.size());  \/\/ \u30e1\u30e2\u30ea\u3092\u4e8b\u524d\u78ba\u4fdd\nstd::copy(list.begin(), list.end(), std::back_inserter(vec));<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u4e0d\u8981\u306a\u30b3\u30d4\u30fc\u306e\u56de\u907f<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u975e\u52b9\u7387\u306a\u65b9\u6cd5\nstd::vector&lt;std::string&gt; vec1;\nfor (const auto&amp; str : string_list) {\n    vec1.push_back(str);  \/\/ \u30b3\u30d4\u30fc\u304c\u767a\u751f\n}\n\n\/\/ \u52b9\u7387\u7684\u306a\u65b9\u6cd5\nstd::vector&lt;std::string&gt; vec2;\nvec2.reserve(string_list.size());\nfor (auto&amp;&amp; str : string_list) {\n    vec2.push_back(std::move(str));  \/\/ \u30e0\u30fc\u30d6\u304c\u767a\u751f\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u521d\u671f\u5316\u65b9\u6cd5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u8aac\u660e\u3059\u308b\u30e2\u30c0\u30f3C++\u3067\u306e\u9ad8\u5ea6\u306a\u521d\u671f\u5316\u30d1\u30bf\u30fc\u30f3\u3078\u306e\u7406\u89e3\u304c\u6df1\u307e\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-7\">\u30e2\u30c0\u30f3C++\u3067\u63a8\u5968\u3055\u308c\u308bvector\u521d\u671f\u5316\u30d1\u30bf\u30fc\u30f3<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u7d71\u4e00\u521d\u671f\u5316\u69cb\u6587\u306b\u3088\u308b\u5b89\u5168\u306a\u521d\u671f\u5316\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30e2\u30c0\u30f3C++\uff08C++11\u4ee5\u964d\uff09\u3067\u306f\u3001\u6ce2\u62ec\u5f27\u3092\u4f7f\u7528\u3057\u305f\u7d71\u4e00\u521d\u671f\u5316\u69cb\u6587\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u65b9\u6cd5\u306f\u578b\u306e\u5b89\u5168\u6027\u304c\u9ad8\u304f\u3001\u610f\u56f3\u3057\u306a\u3044\u578b\u5909\u63db\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u57fa\u672c\u7684\u306a\u7d71\u4e00\u521d\u671f\u5316\u69cb\u6587\nstd::vector&lt;int&gt; vec1{1, 2, 3, 4, 5};  \/\/ \u76f4\u63a5\u8981\u7d20\u3092\u521d\u671f\u5316\n\n\/\/ 2. \u7a7a\u306evector\u306e\u521d\u671f\u5316\nstd::vector&lt;std::string&gt; vec2{};  \/\/ \u660e\u793a\u7684\u306a\u7a7a\u306e\u521d\u671f\u5316\n\n\/\/ 3. \u30b5\u30a4\u30ba\u3068\u521d\u671f\u5024\u306e\u6307\u5b9a\nstd::vector&lt;int&gt; vec3(5, 10);  \/\/ \u5f93\u6765\u306e\u65b9\u6cd5\nstd::vector&lt;int&gt; vec4{5, 10};  \/\/ \u6ce8\u610f\uff1a\u3053\u308c\u306f[5, 10]\u3068\u3044\u30462\u8981\u7d20\u3068\u3057\u3066\u521d\u671f\u5316\u3055\u308c\u308b\n\n\/\/ 4. \u30cd\u30b9\u30c8\u3055\u308c\u305fvector\u306e\u521d\u671f\u5316\nstd::vector&lt;std::vector&lt;int&gt;&gt; matrix{\n    {1, 2, 3},\n    {4, 5, 6},\n    {7, 8, 9}\n};<\/pre>\n\n\n\n<p>\u7d71\u4e00\u521d\u671f\u5316\u306e\u30e1\u30ea\u30c3\u30c8\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6700\u3082\u6c4e\u7528\u7684\u306a\u521d\u671f\u5316\u69cb\u6587<\/li>\n\n\n\n<li>narrowing conversion\u306e\u9632\u6b62<\/li>\n\n\n\n<li>\u4e00\u8cab\u6027\u306e\u3042\u308b\u6587\u6cd5<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u521d\u671f\u5316\u5b50\u30ea\u30b9\u30c8\u3092\u4f7f\u7528\u3057\u305f\u67d4\u8edf\u306a\u521d\u671f\u5316<\/h3>\n\n\n\n<p>std::initializer_list\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u306a\u521d\u671f\u5316\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u76f4\u63a5\u7684\u306a\u521d\u671f\u5316\u5b50\u30ea\u30b9\u30c8\u306e\u4f7f\u7528\nstd::vector&lt;double&gt; values{1.0, 2.5, 3.7, 4.2};\n\n\/\/ 2. \u521d\u671f\u5316\u5b50\u30ea\u30b9\u30c8\u3092\u5909\u6570\u3068\u3057\u3066\u4f7f\u7528\nstd::initializer_list&lt;int&gt; init = {1, 2, 3, 4, 5};\nstd::vector&lt;int&gt; vec(init);\n\n\/\/ 3. \u30ab\u30b9\u30bf\u30e0\u578b\u3067\u306e\u521d\u671f\u5316\u5b50\u30ea\u30b9\u30c8\nclass Point {\npublic:\n    Point(int x, int y) : x_(x), y_(y) {}\nprivate:\n    int x_, y_;\n};\n\nstd::vector&lt;Point&gt; points{\n    {0, 0},   \/\/ Point(0, 0)\u3092\u6697\u9ed9\u7684\u306b\u69cb\u7bc9\n    {1, 2},   \/\/ Point(1, 2)\u3092\u6697\u9ed9\u7684\u306b\u69cb\u7bc9\n    {3, 4}    \/\/ Point(3, 4)\u3092\u6697\u9ed9\u7684\u306b\u69cb\u7bc9\n};\n\n\/\/ 4. \u6761\u4ef6\u4ed8\u304d\u521d\u671f\u5316\nstd::vector&lt;int&gt; conditional{\n    1,\n    2,\n    ([] { return 3; })(),  \/\/ \u30e9\u30e0\u30c0\u5f0f\u306b\u3088\u308b\u52d5\u7684\u306a\u5024\u306e\u751f\u6210\n    4\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u30e0\u30fc\u30d6\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9\u3092\u6d3b\u7528\u3057\u305f\u52b9\u7387\u7684\u306a\u521d\u671f\u5316<\/h3>\n\n\n\n<p>\u30e0\u30fc\u30d6\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4e0d\u5fc5\u8981\u306a\u30b3\u30d4\u30fc\u3092\u907f\u3051\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u30e0\u30fc\u30d6\u69cb\u7bc9\nstd::vector&lt;std::string&gt; createStrings() {\n    return std::vector&lt;std::string&gt;{\"hello\", \"world\"};  \/\/ RVO\/NRVO\u304c\u9069\u7528\u3055\u308c\u308b\n}\nstd::vector&lt;std::string&gt; vec1 = createStrings();  \/\/ \u30e0\u30fc\u30d6\u69cb\u7bc9\n\n\/\/ 2. \u8981\u7d20\u306e\u30e0\u30fc\u30d6\u633f\u5165\nstd::vector&lt;std::unique_ptr&lt;int&gt;&gt; ptrs;\nptrs.push_back(std::make_unique&lt;int&gt;(42));  \/\/ \u30b3\u30d4\u30fc\u4e0d\u53ef\u80fd\u306a\u578b\u3067\u3082\u4f7f\u7528\u53ef\u80fd\n\n\/\/ 3. emplace_back\u306b\u3088\u308b\u76f4\u63a5\u69cb\u7bc9\nstd::vector&lt;std::string&gt; vec2;\nvec2.emplace_back(\"hello\");  \/\/ \u4e00\u6642\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u305b\u305a\u306b\u76f4\u63a5\u69cb\u7bc9\n\n\/\/ 4. \u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u52b9\u7387\u7684\u306b\u8ffd\u52a0\nstd::vector&lt;std::string&gt; vec3;\nvec3.reserve(1000);  \/\/ \u30e1\u30e2\u30ea\u3092\u4e8b\u524d\u78ba\u4fdd\nfor (int i = 0; i &lt; 1000; ++i) {\n    vec3.emplace_back(\"element\" + std::to_string(i));  \/\/ \u52b9\u7387\u7684\u306a\u8ffd\u52a0\n}<\/pre>\n\n\n\n<p>\u52b9\u7387\u7684\u306a\u521d\u671f\u5316\u306e\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n<div id=\"id-42190339-b519-4633-a9b7-88ef9eb8c6f3\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u521d\u671f\u5316\u30d1\u30bf\u30fc\u30f3<\/th><th>\u7528\u9014<\/th><th>\u6ce8\u610f\u70b9<\/th><\/tr><\/thead><tbody><tr><td>\u7d71\u4e00\u521d\u671f\u5316<\/td><td>\u4e00\u822c\u7684\u306a\u521d\u671f\u5316<\/td><td>\u8981\u7d20\u6570\u3068\u5024\u306e\u533a\u5225\u306b\u6ce8\u610f<\/td><\/tr><tr><td>\u521d\u671f\u5316\u5b50\u30ea\u30b9\u30c8<\/td><td>\u30ea\u30c6\u30e9\u30eb\u5024\u306e\u5217\u6319<\/td><td>\u5927\u91cf\u30c7\u30fc\u30bf\u306b\u306f\u4e0d\u5411\u304d<\/td><\/tr><tr><td>\u30e0\u30fc\u30d6\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9<\/td><td>\u30ea\u30bd\u30fc\u30b9\u8ee2\u9001<\/td><td>\u6240\u6709\u6a29\u306e\u79fb\u8ee2\u306b\u6ce8\u610f<\/td><\/tr><tr><td>emplace\u64cd\u4f5c<\/td><td>\u76f4\u63a5\u69cb\u7bc9<\/td><td>\u5b8c\u5168\u8ee2\u9001\u306e\u7406\u89e3\u304c\u5fc5\u8981<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u5b9f\u88c5\u306e\u30d2\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f8b\u5916\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u4f8b\u5916\u5b89\u5168\u306a\u521d\u671f\u5316\ntry {\n    std::vector&lt;std::string&gt; vec;\n    vec.reserve(expected_size);  \/\/ \u4e8b\u524d\u306b\u30e1\u30e2\u30ea\u78ba\u4fdd\n    \/\/ ... \u8981\u7d20\u306e\u8ffd\u52a0\n} catch (const std::exception&amp; e) {\n    \/\/ \u30a8\u30e9\u30fc\u51e6\u7406\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30b5\u30a4\u30ba\u30d2\u30f3\u30c8\u306e\u63d0\u4f9b\nstd::vector&lt;int&gt; vec;\nvec.reserve(1000);  \/\/ \u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\u306e\u56de\u907f\n\/\/ ... \u8981\u7d20\u306e\u8ffd\u52a0<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30e2\u30c0\u30f3\u306a\u521d\u671f\u5316\u30d1\u30bf\u30fc\u30f3\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5b89\u5168\u3067\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-11\">\u5b9f\u52d9\u3067\u4f7f\u3048\u308b\u9ad8\u5ea6\u306avector\u521d\u671f\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u30e1\u30e2\u30ea\u4e88\u7d04\u306b\u3088\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h3>\n\n\n\n<p>\u30e1\u30e2\u30ea\u7ba1\u7406\u3092\u6700\u9069\u5316\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u52b9\u7387\u7684\u306a\u30e1\u30e2\u30ea\u4e88\u7d04\nclass DataManager {\nprivate:\n    std::vector&lt;double&gt; data_;\npublic:\n    DataManager(size_t expected_size) {\n        \/\/ \u30ad\u30e3\u30d1\u30b7\u30c6\u30a3\u3092\u4e8b\u524d\u306b\u78ba\u4fdd\n        data_.reserve(expected_size);\n\n        \/\/ shrink_to_fit\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\n        if (data_.capacity() &gt; expected_size * 1.5) {\n            data_.shrink_to_fit();\n        }\n    }\n\n    \/\/ \u30c7\u30fc\u30bf\u8ffd\u52a0\u6642\u306e\u6700\u9069\u5316\n    void addBulkData(const std::vector&lt;double&gt;&amp; new_data) {\n        \/\/ \u8ffd\u52a0\u30c7\u30fc\u30bf\u7528\u306e\u30e1\u30e2\u30ea\u3092\u78ba\u4fdd\n        if (data_.size() + new_data.size() &gt; data_.capacity()) {\n            data_.reserve(data_.size() + new_data.size());\n        }\n        \/\/ \u30c7\u30fc\u30bf\u306e\u8ffd\u52a0\n        data_.insert(data_.end(), new_data.begin(), new_data.end());\n    }\n};\n\n\/\/ 2. \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u76e3\u8996\nclass MemoryMonitor {\npublic:\n    static size_t getVectorMemoryUsage(const std::vector&lt;int&gt;&amp; vec) {\n        return vec.capacity() * sizeof(int) +  \/\/ \u5b9f\u30c7\u30fc\u30bf\u9818\u57df\n               sizeof(vec);                    \/\/ vector\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u81ea\u4f53\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u30ab\u30b9\u30bf\u30e0\u30a2\u30ed\u30b1\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u305f\u7279\u6b8a\u306a\u521d\u671f\u5316<\/h3>\n\n\n\n<p>\u7279\u5b9a\u306e\u30e1\u30e2\u30ea\u7ba1\u7406\u8981\u4ef6\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u3001\u30ab\u30b9\u30bf\u30e0\u30a2\u30ed\u30b1\u30fc\u30bf\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u30a2\u30e9\u30a4\u30f3\u30e1\u30f3\u30c8\u5236\u5fa1\u7528\u30a2\u30ed\u30b1\u30fc\u30bf\ntemplate&lt;typename T, size_t Alignment&gt;\nclass AlignedAllocator {\npublic:\n    using value_type = T;\n\n    AlignedAllocator() noexcept {}\n\n    template&lt;typename U&gt;\n    AlignedAllocator(const AlignedAllocator&lt;U, Alignment&gt;&amp;) noexcept {}\n\n    T* allocate(std::size_t n) {\n        if (n &gt; std::numeric_limits&lt;std::size_t&gt;::max() \/ sizeof(T))\n            throw std::bad_alloc();\n\n        if (void* ptr = std::aligned_alloc(Alignment, n * sizeof(T)))\n            return static_cast&lt;T*&gt;(ptr);\n\n        throw std::bad_alloc();\n    }\n\n    void deallocate(T* p, std::size_t) noexcept {\n        std::free(p);\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nstd::vector&lt;double, AlignedAllocator&lt;double, 32&gt;&gt; aligned_vector;\n\n\/\/ 2. \u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u6a5f\u80fd\u4ed8\u304d\u30a2\u30ed\u30b1\u30fc\u30bf\ntemplate&lt;typename T&gt;\nclass MonitoredAllocator {\nprivate:\n    static size_t total_allocated_;\n\npublic:\n    using value_type = T;\n\n    T* allocate(std::size_t n) {\n        total_allocated_ += n * sizeof(T);\n        return std::allocator&lt;T&gt;().allocate(n);\n    }\n\n    void deallocate(T* p, std::size_t n) noexcept {\n        total_allocated_ -= n * sizeof(T);\n        std::allocator&lt;T&gt;().deallocate(p, n);\n    }\n\n    static size_t getTotalAllocated() {\n        return total_allocated_;\n    }\n};\n\ntemplate&lt;typename T&gt;\nsize_t MonitoredAllocator&lt;T&gt;::total_allocated_ = 0;<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u4e26\u5217\u51e6\u7406\u3092\u8003\u616e\u3057\u305fvector\u306e\u521d\u671f\u5316\u6226\u7565<\/h3>\n\n\n\n<p>\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306e\u52b9\u7387\u7684\u306a\u521d\u671f\u5316\u624b\u6cd5\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u4e26\u5217\u521d\u671f\u5316\u30d8\u30eb\u30d1\u30fc\ntemplate&lt;typename T&gt;\nclass ParallelVectorInitializer {\npublic:\n    static std::vector&lt;T&gt; initialize(size_t size, \n                                   std::function&lt;T(size_t)&gt; generator) {\n        std::vector&lt;T&gt; result(size);\n\n        \/\/ \u30b9\u30ec\u30c3\u30c9\u6570\u306e\u6c7a\u5b9a\n        const size_t thread_count = std::thread::hardware_concurrency();\n        const size_t chunk_size = size \/ thread_count;\n\n        std::vector&lt;std::thread&gt; threads;\n\n        \/\/ \u5404\u30b9\u30ec\u30c3\u30c9\u3067\u90e8\u5206\u7684\u306b\u521d\u671f\u5316\n        for (size_t i = 0; i &lt; thread_count; ++i) {\n            size_t start = i * chunk_size;\n            size_t end = (i == thread_count - 1) ? size : (i + 1) * chunk_size;\n\n            threads.emplace_back([start, end, &amp;result, &amp;generator]() {\n                for (size_t j = start; j &lt; end; ++j) {\n                    result[j] = generator(j);\n                }\n            });\n        }\n\n        \/\/ \u30b9\u30ec\u30c3\u30c9\u306e\u7d42\u4e86\u3092\u5f85\u6a5f\n        for (auto&amp; thread : threads) {\n            thread.join();\n        }\n\n        return result;\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nstd::vector&lt;int&gt; parallel_vec = ParallelVectorInitializer&lt;int&gt;::initialize(\n    1000000,\n    [](size_t index) { return static_cast&lt;int&gt;(index * 2); }\n);\n\n\/\/ 2. \u30ed\u30c3\u30af\u30d5\u30ea\u30fc\u306a\u8ffd\u52a0\u64cd\u4f5c\u306e\u5b9f\u88c5\ntemplate&lt;typename T&gt;\nclass LockFreeVector {\nprivate:\n    std::vector&lt;T&gt; data_;\n    std::atomic&lt;size_t&gt; size_{0};\n\npublic:\n    LockFreeVector(size_t capacity) {\n        data_.reserve(capacity);\n        data_.resize(capacity);\n    }\n\n    bool try_push_back(const T&amp; value) {\n        size_t current_size = size_.load(std::memory_order_relaxed);\n        if (current_size &gt;= data_.capacity()) {\n            return false;\n        }\n\n        if (size_.compare_exchange_strong(current_size, current_size + 1)) {\n            data_[current_size] = value;\n            return true;\n        }\n\n        return false;\n    }\n};<\/pre>\n\n\n\n<p>\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u6700\u9069\u5316\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e88\u60f3\u30b5\u30a4\u30ba\u306e20%\u5897\u3057\u3067reserve\u3092\u884c\u3046<\/li>\n\n\n\n<li>\u5b9a\u671f\u7684\u306acapacity\u78ba\u8a8d\u3068shrink_to_fit\u306e\u5b9f\u884c<\/li>\n\n\n\n<li>\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u8981\u4ef6\u306e\u8003\u616e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30ab\u30b9\u30bf\u30e0\u30a2\u30ed\u30b1\u30fc\u30bf\u8a2d\u8a08\u306e\u30dd\u30a4\u30f3\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u9632\u6b62\u6a5f\u69cb\u306e\u5b9f\u88c5<\/li>\n\n\n\n<li>\u4f8b\u5916\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/li>\n\n\n\n<li>\u30c7\u30d0\u30c3\u30b0\u60c5\u5831\u306e\u53ce\u96c6\u6a5f\u80fd<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4e26\u5217\u51e6\u7406\u306b\u304a\u3051\u308b\u6ce8\u610f\u70b9<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u7af6\u5408\u306e\u9632\u6b62<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30c1\u30e3\u30f3\u30af\u30b5\u30a4\u30ba\u306e\u9078\u629e<\/li>\n\n\n\n<li>\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u6d3b\u7528\u306e\u691c\u8a0e<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u5805\u7262\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-15\">\u3088\u304f\u3042\u308bvector\u521d\u671f\u5316\u306e\u843d\u3068\u3057\u7a74\u3068\u5bfe\u7b56<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u305f\u3081\u306e\u521d\u671f\u5316\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>vector\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u3088\u304f\u906d\u9047\u3059\u308b\u30e1\u30e2\u30ea\u95a2\u9023\u306e\u554f\u984c\u3068\u305d\u306e\u5bfe\u7b56\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u4e0d\u9069\u5207\u306a\u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u4f8b\u3068\u5bfe\u7b56\nclass ResourceManager {\nprivate:\n    \/\/ \u5371\u967a\u306a\u5b9f\u88c5\n    std::vector&lt;char*&gt; bad_resources_;\n    \/\/ \u5b89\u5168\u306a\u5b9f\u88c5\n    std::vector&lt;std::unique_ptr&lt;char[]&gt;&gt; good_resources_;\n\npublic:\n    \/\/ \u5371\u967a\u306a\u5b9f\u88c5\u4f8b\n    void addBadResource() {\n        char* ptr = new char[1024];  \/\/ \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u53ef\u80fd\u6027\n        try {\n            bad_resources_.push_back(ptr);  \/\/ \u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\n        } catch (...) {\n            delete[] ptr;  \/\/ \u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u304c\u5fc5\u8981\n            throw;\n        }\n    }\n\n    \/\/ \u5b89\u5168\u306a\u5b9f\u88c5\u4f8b\n    void addGoodResource() {\n        good_resources_.push_back(\n            std::make_unique&lt;char[]&gt;(1024)  \/\/ RAII\u306b\u3088\u308b\u81ea\u52d5\u7ba1\u7406\n        );\n    }\n\n    ~ResourceManager() {\n        \/\/ bad_resources_\u306f\u624b\u52d5\u3067\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u304c\u5fc5\u8981\n        for (auto ptr : bad_resources_) {\n            delete[] ptr;\n        }\n        \/\/ good_resources_\u306f\u81ea\u52d5\u3067\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\n    }\n};\n\n\/\/ 2. \u5faa\u74b0\u53c2\u7167\u306e\u9632\u6b62\nclass Node {\n    std::vector&lt;std::weak_ptr&lt;Node&gt;&gt; neighbors_;  \/\/ weak_ptr\u3067\u5faa\u74b0\u53c2\u7167\u3092\u9632\u3050\npublic:\n    void addNeighbor(std::shared_ptr&lt;Node&gt; neighbor) {\n        neighbors_.push_back(neighbor);\n    }\n};<\/pre>\n\n\n\n<p>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u9632\u6b62\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>RAII\u539f\u5247\u306e\u9075\u5b88<\/li>\n\n\n\n<li>\u4f8b\u5916\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/li>\n\n\n\n<li>\u5faa\u74b0\u53c2\u7167\u306e\u56de\u907f<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u56de\u907f\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p>vector\u306e\u4f7f\u7528\u306b\u3088\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b\u306e\u4e3b\u306a\u539f\u56e0\u3068\u5bfe\u7b56\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u4e0d\u5fc5\u8981\u306a\u30b3\u30d4\u30fc\u306e\u56de\u907f\nclass DataContainer {\nprivate:\n    std::vector&lt;std::string&gt; data_;\n\npublic:\n    \/\/ \u975e\u52b9\u7387\u306a\u5b9f\u88c5\n    void addBadItem(const std::string&amp; item) {\n        data_.push_back(item);  \/\/ \u30b3\u30d4\u30fc\u304c\u767a\u751f\n    }\n\n    \/\/ \u52b9\u7387\u7684\u306a\u5b9f\u88c5\n    void addGoodItem(std::string item) {\n        data_.push_back(std::move(item));  \/\/ \u30e0\u30fc\u30d6\u304c\u767a\u751f\n    }\n\n    \/\/ \u3055\u3089\u306b\u52b9\u7387\u7684\u306a\u5b9f\u88c5\n    template&lt;typename... Args&gt;\n    void emplaceItem(Args&amp;&amp;... args) {\n        data_.emplace_back(std::forward&lt;Args&gt;(args)...);  \/\/ \u76f4\u63a5\u69cb\u7bc9\n    }\n};\n\n\/\/ 2. \u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\u306e\u6700\u5c0f\u5316\nclass OptimizedContainer {\nprivate:\n    std::vector&lt;int&gt; data_;\n\n    \/\/ \u6210\u9577\u7387\u306e\u8a08\u7b97\n    size_t calculateNextCapacity(size_t required) {\n        size_t current = data_.capacity();\n        if (current == 0) {\n            return required;\n        }\n        return std::max(required, current * 3 \/ 2);\n    }\n\npublic:\n    void addItems(const std::vector&lt;int&gt;&amp; items) {\n        \/\/ \u5fc5\u8981\u306a\u30b5\u30a4\u30ba\u3092\u4e8b\u524d\u8a08\u7b97\n        size_t required = data_.size() + items.size();\n        if (required &gt; data_.capacity()) {\n            data_.reserve(calculateNextCapacity(required));\n        }\n        \/\/ \u30c7\u30fc\u30bf\u306e\u8ffd\u52a0\n        data_.insert(data_.end(), items.begin(), items.end());\n    }\n};<\/pre>\n\n\n\n<p>\u3088\u304f\u3042\u308b\u6027\u80fd\u554f\u984c\u3068\u305d\u306e\u5bfe\u7b56\uff1a<\/p>\n\n\n<div id=\"id-78a1865c-8a3e-46a4-88a6-953dd77ca8cf\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u554f\u984c<\/th><th>\u75c7\u72b6<\/th><th>\u5bfe\u7b56<\/th><\/tr><\/thead><tbody><tr><td>\u983b\u7e41\u306a\u518d\u5272\u308a\u5f53\u3066<\/td><td>\u30e1\u30e2\u30ea\u30d5\u30e9\u30b0\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3<\/td><td>\u9069\u5207\u306areserve()<\/td><\/tr><tr><td>\u4e0d\u8981\u306a\u30b3\u30d4\u30fc<\/td><td>CPU\u4f7f\u7528\u7387\u306e\u4e0a\u6607<\/td><td>\u30e0\u30fc\u30d6\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9\u6d3b\u7528<\/td><\/tr><tr><td>\u30ad\u30e3\u30c3\u30b7\u30e5\u30df\u30b9<\/td><td>\u51e6\u7406\u901f\u5ea6\u306e\u4f4e\u4e0b<\/td><td>\u30c7\u30fc\u30bf\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u6700\u9069\u5316<\/td><\/tr><tr><td>\u30e1\u30e2\u30ea\u65ad\u7247\u5316<\/td><td>\u30e1\u30e2\u30ea\u4f7f\u7528\u52b9\u7387\u306e\u4f4e\u4e0b<\/td><td>shrink_to_fit\u306e\u9069\u5207\u306a\u4f7f\u7528<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u8b66\u544a\u30b5\u30a4\u30f3\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4e0d\u5b89\u5b9a\u306a\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/li>\n\n\n\n<li>\u4e88\u671f\u305b\u306c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u5358\u8abf\u5897\u52a0<\/li>\n\n\n\n<li>\u65ad\u7247\u7684\u306a\u30e1\u30e2\u30ea\u30a2\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 3. \u30c7\u30d0\u30c3\u30b0\u652f\u63f4\u30c4\u30fc\u30eb\nclass VectorDebugHelper {\npublic:\n    template&lt;typename T&gt;\n    static void printVectorStats(const std::vector&lt;T&gt;&amp; vec) {\n        std::cout &lt;&lt; \"Size: \" &lt;&lt; vec.size() &lt;&lt; \"\\n\"\n                  &lt;&lt; \"Capacity: \" &lt;&lt; vec.capacity() &lt;&lt; \"\\n\"\n                  &lt;&lt; \"Memory usage: \" &lt;&lt; vec.capacity() * sizeof(T) &lt;&lt; \" bytes\\n\"\n                  &lt;&lt; \"Load factor: \" &lt;&lt; static_cast&lt;double&gt;(vec.size()) \/ vec.capacity() &lt;&lt; \"\\n\";\n    }\n\n    template&lt;typename T&gt;\n    static void assertVectorInvariants(const std::vector&lt;T&gt;&amp; vec) {\n        assert(vec.size() &lt;= vec.capacity());\n        assert(vec.empty() == (vec.size() == 0));\n    }\n};<\/pre>\n\n\n\n<p>\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u554f\u984c\u306e\u8a3a\u65ad<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>valgrind\u3084Address Sanitizer\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u5b9a\u671f\u7684\u306a\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0<\/li>\n\n\n\n<li>\u30ea\u30fc\u30af\u30c7\u30a3\u30c6\u30af\u30bf\u306e\u4f7f\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30d5\u30a1\u30a4\u30e9\u3092\u4f7f\u7528\u3057\u305f\u6e2c\u5b9a<\/li>\n\n\n\n<li>\u30ad\u30e3\u30d1\u30b7\u30c6\u30a3\u306e\u76e3\u8996<\/li>\n\n\n\n<li>\u30a2\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u56de\u6570\u306e\u8ffd\u8de1<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30d0\u30c3\u30b0\u6226\u7565<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u30ed\u30b0\u51fa\u529b\u306e\u5b9f\u88c5<\/li>\n\n\n\n<li>\u4f8b\u5916\u51e6\u7406\u306e\u78ba\u8a8d<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u843d\u3068\u3057\u7a74\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306a\u5bfe\u7b56\u3092\u8b1b\u3058\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u958b\u767a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-18\">\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u4f7f\u7528\u3055\u308c\u308b\u521d\u671f\u5316\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u5b9f\u52d9\u3067\u306e\u5178\u578b\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3068\u3001\u305d\u308c\u306b\u5bfe\u3059\u308b\u63a8\u5968\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u30c7\u30fc\u30bf\u51e6\u7406\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u5b9f\u88c5\u4f8b\nclass DataProcessor {\nprivate:\n    \/\/ \u8a2d\u5b9a\u60c5\u5831\n    struct Config {\n        size_t batch_size;\n        size_t buffer_capacity;\n        bool enable_validation;\n    };\n\n    Config config_;\n    std::vector&lt;std::vector&lt;double&gt;&gt; data_batches_;\n\npublic:\n    explicit DataProcessor(const Config&amp; config) : config_(config) {\n        \/\/ \u4e88\u60f3\u3055\u308c\u308b\u4f7f\u7528\u91cf\u306b\u57fa\u3065\u3044\u3066\u30e1\u30e2\u30ea\u3092\u4e88\u7d04\n        data_batches_.reserve(config.buffer_capacity);\n    }\n\n    void processBatch(const std::vector&lt;double&gt;&amp; input_data) {\n        \/\/ \u30d0\u30c3\u30c1\u30b5\u30a4\u30ba\u3054\u3068\u306b\u30c7\u30fc\u30bf\u3092\u5206\u5272\n        const size_t num_batches = \n            (input_data.size() + config_.batch_size - 1) \/ config_.batch_size;\n\n        for (size_t i = 0; i &lt; num_batches; ++i) {\n            const size_t start = i * config_.batch_size;\n            const size_t end = std::min(start + config_.batch_size, \n                                      input_data.size());\n\n            \/\/ \u52b9\u7387\u7684\u306a\u30d0\u30c3\u30c1\u30c7\u30fc\u30bf\u306e\u8ffd\u52a0\n            data_batches_.emplace_back(\n                input_data.begin() + start,\n                input_data.begin() + end\n            );\n        }\n    }\n};\n\n\/\/ 2. \u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u30b7\u30b9\u30c6\u30e0\ntemplate&lt;typename Key, typename Value&gt;\nclass ThreadSafeCache {\nprivate:\n    struct CacheEntry {\n        Value value;\n        std::chrono::system_clock::time_point expiry;\n    };\n\n    std::mutex mutex_;\n    std::vector&lt;std::pair&lt;Key, CacheEntry&gt;&gt; cache_;\n\npublic:\n    ThreadSafeCache(size_t expected_size = 1000) {\n        cache_.reserve(expected_size);\n    }\n\n    void insert(const Key&amp; key, const Value&amp; value, \n                std::chrono::seconds ttl = std::chrono::seconds(3600)) {\n        const auto expiry = std::chrono::system_clock::now() + ttl;\n        std::lock_guard&lt;std::mutex&gt; lock(mutex_);\n\n        \/\/ \u65e2\u5b58\u30a8\u30f3\u30c8\u30ea\u306e\u66f4\u65b0\u307e\u305f\u306f\u65b0\u898f\u8ffd\u52a0\n        auto it = std::find_if(cache_.begin(), cache_.end(),\n            [&amp;key](const auto&amp; entry) { return entry.first == key; });\n\n        if (it != cache_.end()) {\n            it-&gt;second = CacheEntry{value, expiry};\n        } else {\n            cache_.emplace_back(key, CacheEntry{value, expiry});\n        }\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u6307\u6458\u3055\u308c\u3084\u3059\u3044\u521d\u671f\u5316\u306e\u554f\u984c\u70b9<\/h3>\n\n\n\n<p>\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u3088\u304f\u6307\u6458\u3055\u308c\u308b\u554f\u984c\u3068\u305d\u306e\u6539\u5584\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u521d\u671f\u5316\u306b\u95a2\u3059\u308b\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30ec\u30d3\u30e5\u30fc\u5bfe\u8c61\u306e\u60aa\u3044\u4f8b\nclass BadExample {\n    std::vector&lt;int&gt; data;  \/\/ \u30b5\u30a4\u30ba\u6307\u5b9a\u306a\u3057\n\n    void processData() {\n        for (int i = 0; i &lt; 1000; ++i) {\n            data.push_back(i);  \/\/ \u983b\u7e41\u306a\u518d\u5272\u308a\u5f53\u3066\n        }\n    }\n};\n\n\/\/ \u6539\u5584\u5f8c\u306e\u826f\u3044\u4f8b\nclass GoodExample {\n    std::vector&lt;int&gt; data;\n\n    GoodExample() {\n        data.reserve(1000);  \/\/ \u9069\u5207\u306a\u30b5\u30a4\u30ba\u6307\u5b9a\n    }\n\n    void processData() {\n        for (int i = 0; i &lt; 1000; ++i) {\n            data.push_back(i);  \/\/ \u518d\u5272\u308a\u5f53\u3066\u306a\u3057\n        }\n    }\n};<\/pre>\n\n\n\n<p>\u30ec\u30d3\u30e5\u30fc\u6642\u306e\u4e3b\u306a\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n<div id=\"id-8b7e638a-828f-46c4-9af9-9334766ac45a\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30ab\u30c6\u30b4\u30ea<\/th><th>\u30c1\u30a7\u30c3\u30af\u9805\u76ee<\/th><th>\u63a8\u5968\u3055\u308c\u308b\u5bfe\u7b56<\/th><\/tr><\/thead><tbody><tr><td>\u30e1\u30e2\u30ea\u7ba1\u7406<\/td><td>\u9069\u5207\u306areserve\/resize<\/td><td>\u4e88\u60f3\u30b5\u30a4\u30ba\u306b\u57fa\u3065\u304f\u4e8b\u524d\u78ba\u4fdd<\/td><\/tr><tr><td>\u4f8b\u5916\u5b89\u5168\u6027<\/td><td>\u4f8b\u5916\u767a\u751f\u6642\u306e\u72b6\u614b<\/td><td>RAII\u3068\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u306e\u4f7f\u7528<\/td><\/tr><tr><td>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/td><td>\u4e0d\u8981\u306a\u30b3\u30d4\u30fc<\/td><td>\u30e0\u30fc\u30d6\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9\u306e\u6d3b\u7528<\/td><\/tr><tr><td>\u30b9\u30ec\u30c3\u30c9\u5b89\u5168\u6027<\/td><td>\u4e26\u884c\u30a2\u30af\u30bb\u30b9<\/td><td>\u9069\u5207\u306a\u540c\u671f\u6a5f\u69cb\u306e\u5b9f\u88c5<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u306e\u5b9f\u8df5\u4f8b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30ec\u30d3\u30e5\u30fc\u524d\u306e\u30b3\u30fc\u30c9\nclass DataManager {\n    std::vector&lt;std::string*&gt; items;  \/\/ \u751f\u30dd\u30a4\u30f3\u30bf\u306e\u4f7f\u7528\npublic:\n    void addItem(const std::string&amp; text) {\n        items.push_back(new std::string(text));  \/\/ \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u53ef\u80fd\u6027\n    }\n};\n\n\/\/ \u30ec\u30d3\u30e5\u30fc\u5f8c\u306e\u6539\u5584\u30b3\u30fc\u30c9\nclass ImprovedDataManager {\n    std::vector&lt;std::unique_ptr&lt;std::string&gt;&gt; items;\npublic:\n    void addItem(std::string text) {\n        items.push_back(\n            std::make_unique&lt;std::string&gt;(std::move(text))\n        );\n    }\n};<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u5b9f\u88c5\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30e2\u30c0\u30f3\u306a\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306e\u4f8b\ntemplate&lt;typename T&gt;\nclass ModernContainer {\nprivate:\n    std::vector&lt;T&gt; data_;\n\npublic:\n    \/\/ \u30b5\u30a4\u30ba\u30d2\u30f3\u30c8\u3092\u53d7\u3051\u53d6\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    explicit ModernContainer(size_t size_hint = 0) {\n        if (size_hint &gt; 0) {\n            data_.reserve(size_hint);\n        }\n    }\n\n    \/\/ \u52b9\u7387\u7684\u306a\u8981\u7d20\u8ffd\u52a0\n    template&lt;typename... Args&gt;\n    void emplace(Args&amp;&amp;... args) {\n        data_.emplace_back(std::forward&lt;Args&gt;(args)...);\n    }\n\n    \/\/ \u7bc4\u56f2\u30d9\u30fc\u30b9\u306e\u8ffd\u52a0\n    template&lt;typename InputIt&gt;\n    void insert_range(InputIt first, InputIt last) {\n        const auto distance = std::distance(first, last);\n        if (data_.size() + distance &gt; data_.capacity()) {\n            data_.reserve(data_.size() + distance);\n        }\n        data_.insert(data_.end(), first, last);\n    }\n};<\/pre>\n\n\n\n<p>\u958b\u767a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u63a8\u5968\u4e8b\u9805\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u521d\u671f\u5316\u6226\u7565\u306e\u9078\u629e\u57fa\u6e96<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u30b5\u30a4\u30ba\u304c\u65e2\u77e5\uff1aresize()\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u30b5\u30a4\u30ba\u4e0d\u660e\u3060\u304c\u4e88\u6e2c\u53ef\u80fd\uff1areserve()\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u52d5\u7684\u306a\u6210\u9577\uff1a\u9069\u5207\u306a\u6210\u9577\u6226\u7565\u3092\u5b9f\u88c5<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u54c1\u8cea\u7ba1\u7406\u306e\u30dd\u30a4\u30f3\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9759\u7684\u89e3\u6790\u30c4\u30fc\u30eb\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c6\u30b9\u30c8\u306e\u5b9f\u65bd<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u691c\u51fa\u306e\u5b9a\u671f\u5b9f\u884c<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u5411\u4e0a\u306e\u305f\u3081\u306e\u6307\u91dd<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u660e\u78ba\u306a\u547d\u540d\u898f\u5247\u306e\u63a1\u7528<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30b3\u30e1\u30f3\u30c8\u8a18\u8ff0<\/li>\n\n\n\n<li>\u5358\u4f53\u30c6\u30b9\u30c8\u306e\u5145\u5b9f<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":{"0":"post-2163","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-cpp","7":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2163","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2163"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2163\/revisions"}],"predecessor-version":[{"id":2164,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2163\/revisions\/2164"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}