{"id":78,"date":"2015-12-18T15:20:40","date_gmt":"2015-12-18T07:20:40","guid":{"rendered":"http:\/\/zsaber.com\/blog\/?p=78"},"modified":"2019-08-26T15:36:13","modified_gmt":"2019-08-26T07:36:13","slug":"unordered_map-%e6%89%8b%e5%8a%a8%e7%ae%a1%e7%90%86%e5%85%83%e7%b4%a0%e5%86%85%e5%ad%98%e6%97%b6%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9","status":"publish","type":"post","link":"http:\/\/zsaber.com\/blog\/p\/78","title":{"rendered":"unordered_map \u624b\u52a8\u7ba1\u7406\u5143\u7d20\u5185\u5b58\u65f6\u7684\u6ce8\u610f\u4e8b\u9879"},"content":{"rendered":"<h1>\u95ee\u9898<\/h1>\n<p>\u6700\u8fd1\u64b8\u4ee3\u7801\u65f6\u53d1\u73b0\u4e00\u4e2a\u8be1\u5f02\u7684\u4e8b\u60c5, \u5176\u4e2d\u7528\u5230\u4e86\u4e00\u4e2a\u5982\u4e0b\u7684\u6570\u636e\u7ed3\u6784<\/p>\n<pre><code class=\"language-cpp\">typedef unordered_map&lt;char *, SomeType, MyHasher, MyComparer&gt; MyMap;<\/code><\/pre>\n<p>\u59d1\u4e14\u4e0d\u8bba\u8fd9\u5947\u8469\u7684\u7ed3\u6784, \u7b80\u5355\u6982\u62ec\u4e00\u4e0b\u5c31\u662f:<\/p>\n<ul>\n<li>key \u662f\u624b\u52a8\u7ba1\u7406\u5185\u5b58\u7684\u5b57\u7b26\u4e32 (\u6dfb\u52a0\u65f6\u624b\u52a8 malloc, \u5220\u9664\u65f6\u624b\u52a8 free, \u5f53\u7136\u585e\u8fdb map \u540e\u4e0d\u4f1a\u4fee\u6539)<\/li>\n<li>\u4f7f\u7528\u81ea\u5b9a\u4e49 hash \u548c compare \u51fd\u6570\u6765\u63d0\u4f9b unordered_map \u6240\u9700\u7684\u529f\u80fd<\/li>\n<\/ul>\n<p>\u4e8e\u662f, \u95ee\u9898\u6765\u4e86, \u4ee5\u4e0b\u662f\u6700\u7b80\u590d\u73b0\u4ee3\u7801:<\/p>\n<pre><code class=\"language-cpp\">\/\/ \u63d2\u5165\nMyMap m;\nchar *key = my_malloc_and_copy(&quot;123&quot;);\nm[key] = SomeType();\n\n\/\/ \u5220\u9664\u5168\u90e8\nMyMap tmp = m;\nm.clear();\nfor(MyMap::iterator it = tmp.begin(); it != tmp.end(); ++it)\n{\n    free(it-&gt;first);\n}<\/code><\/pre>\n<p>\u548b\u4e00\u770b\u5f88\u6807\u51c6\u7684 iterator \u904d\u5386\u5220\u9664\u5bf9\u4e0d\u5bf9? \u5f88\u53ef\u60dc\u7684\u544a\u8bc9\u4f60, \u90a3\u4e2a\u5faa\u73af\u4f1a\u8fdb\u5165\u4e24\u6b21, \u7136\u540e\u7406\u6240\u5f53\u7136\u7684\u6302\u5728\u7b2c\u4e8c\u6b21\u7684 free \u4e0a\u9762<\/p>\n<h1>\u539f\u56e0<\/h1>\n<p>\u539f\u56e0\u4e00\u53e5\u8bdd\u5c31\u53ef\u4ee5\u6982\u62ec:<\/p>\n<p>\u5bf9\u4e8e unordered_map, ++it \u7684\u65f6\u5019\u9700\u8981\u8ba1\u7b97\u5f53\u524d <code>it-&gt;first<\/code> \u7684 hash \u503c, \u7136\u800c\u6b64\u65f6\u5df2\u88ab free \u4e86<\/p>\n<h1>\u540e\u8bb0<\/h1>\n<ul>\n<li>\u5728 mac \u7248 Qt \u4e0a\u9047\u5230\u8be5\u95ee\u9898, \u540c\u6837\u7684\u4ee3\u7801\u5728\u5176\u4ed6\u5e73\u53f0\u4e0b\u4e0d\u4f1a\u590d\u73b0 (\u8bba\u8de8\u5e73\u53f0\u4ee3\u7801\u7684\u91cd\u8981\u6027)<\/li>\n<li>\u6bd4\u8f83\u5947\u8469\u7684\u662f, \u65ad\u70b9\u8c03\u8bd5\u4e0b\u4e0d\u4f1a\u6302\u6389, \u800c\u76f4\u63a5\u8fd0\u884c\u4f1a\u6302\u6389, \u5bfc\u81f4\u627e\u8fd9\u4e2a\u95ee\u9898\u65f6\u82b1\u4e86\u597d\u591a\u65f6\u95f4<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u95ee\u9898 \u6700\u8fd1\u64b8\u4ee3\u7801\u65f6\u53d1\u73b0\u4e00\u4e2a\u8be1\u5f02\u7684\u4e8b\u60c5, \u5176\u4e2d\u7528\u5230\u4e86\u4e00\u4e2a\u5982\u4e0b\u7684\u6570\u636e\u7ed3\u6784 typedef unordered_ma\u2026 <span class=\"read-more\"><a href=\"http:\/\/zsaber.com\/blog\/p\/78\">Read More &raquo;<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>unordered_map \u624b\u52a8\u7ba1\u7406\u5143\u7d20\u5185\u5b58\u65f6\u7684\u6ce8\u610f\u4e8b\u9879 - \u67d0Z\u7684\u535a\u5ba2<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/zsaber.com\/blog\/p\/78\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"unordered_map \u624b\u52a8\u7ba1\u7406\u5143\u7d20\u5185\u5b58\u65f6\u7684\u6ce8\u610f\u4e8b\u9879 - \u67d0Z\u7684\u535a\u5ba2\" \/>\n<meta property=\"og:description\" content=\"\u95ee\u9898 \u6700\u8fd1\u64b8\u4ee3\u7801\u65f6\u53d1\u73b0\u4e00\u4e2a\u8be1\u5f02\u7684\u4e8b\u60c5, \u5176\u4e2d\u7528\u5230\u4e86\u4e00\u4e2a\u5982\u4e0b\u7684\u6570\u636e\u7ed3\u6784 typedef unordered_ma\u2026 Read More &raquo;\" \/>\n<meta property=\"og:url\" content=\"http:\/\/zsaber.com\/blog\/p\/78\" \/>\n<meta property=\"og:site_name\" content=\"\u67d0Z\u7684\u535a\u5ba2\" \/>\n<meta property=\"article:published_time\" content=\"2015-12-18T07:20:40+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-08-26T07:36:13+00:00\" \/>\n<meta name=\"author\" content=\"Z\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"Z\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"http:\/\/zsaber.com\/blog\/p\/78#article\",\"isPartOf\":{\"@id\":\"http:\/\/zsaber.com\/blog\/p\/78\"},\"author\":{\"name\":\"Z\",\"@id\":\"http:\/\/zsaber.com\/blog\/#\/schema\/person\/6a6701fc719eff087e24e39a00e2280f\"},\"headline\":\"unordered_map \u624b\u52a8\u7ba1\u7406\u5143\u7d20\u5185\u5b58\u65f6\u7684\u6ce8\u610f\u4e8b\u9879\",\"datePublished\":\"2015-12-18T07:20:40+00:00\",\"dateModified\":\"2019-08-26T07:36:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"http:\/\/zsaber.com\/blog\/p\/78\"},\"wordCount\":19,\"commentCount\":0,\"publisher\":{\"@id\":\"http:\/\/zsaber.com\/blog\/#\/schema\/person\/6a6701fc719eff087e24e39a00e2280f\"},\"articleSection\":[\"C++\"],\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"http:\/\/zsaber.com\/blog\/p\/78#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"http:\/\/zsaber.com\/blog\/p\/78\",\"url\":\"http:\/\/zsaber.com\/blog\/p\/78\",\"name\":\"unordered_map \u624b\u52a8\u7ba1\u7406\u5143\u7d20\u5185\u5b58\u65f6\u7684\u6ce8\u610f\u4e8b\u9879 - \u67d0Z\u7684\u535a\u5ba2\",\"isPartOf\":{\"@id\":\"http:\/\/zsaber.com\/blog\/#website\"},\"datePublished\":\"2015-12-18T07:20:40+00:00\",\"dateModified\":\"2019-08-26T07:36:13+00:00\",\"breadcrumb\":{\"@id\":\"http:\/\/zsaber.com\/blog\/p\/78#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"http:\/\/zsaber.com\/blog\/p\/78\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"http:\/\/zsaber.com\/blog\/p\/78#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"http:\/\/zsaber.com\/blog\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"unordered_map \u624b\u52a8\u7ba1\u7406\u5143\u7d20\u5185\u5b58\u65f6\u7684\u6ce8\u610f\u4e8b\u9879\"}]},{\"@type\":\"WebSite\",\"@id\":\"http:\/\/zsaber.com\/blog\/#website\",\"url\":\"http:\/\/zsaber.com\/blog\/\",\"name\":\"\u67d0Z\u7684\u535a\u5ba2\",\"description\":\"\u7b80\u4ecb\u53c8\u4e0d\u80fd\u5403\",\"publisher\":{\"@id\":\"http:\/\/zsaber.com\/blog\/#\/schema\/person\/6a6701fc719eff087e24e39a00e2280f\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"http:\/\/zsaber.com\/blog\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"http:\/\/zsaber.com\/blog\/#\/schema\/person\/6a6701fc719eff087e24e39a00e2280f\",\"name\":\"Z\",\"logo\":{\"@id\":\"http:\/\/zsaber.com\/blog\/#\/schema\/person\/image\/\"},\"description\":\"\u67d0Z\",\"sameAs\":[\"http:\/\/ZFFramework.com\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"unordered_map \u624b\u52a8\u7ba1\u7406\u5143\u7d20\u5185\u5b58\u65f6\u7684\u6ce8\u610f\u4e8b\u9879 - \u67d0Z\u7684\u535a\u5ba2","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"http:\/\/zsaber.com\/blog\/p\/78","og_locale":"zh_CN","og_type":"article","og_title":"unordered_map \u624b\u52a8\u7ba1\u7406\u5143\u7d20\u5185\u5b58\u65f6\u7684\u6ce8\u610f\u4e8b\u9879 - \u67d0Z\u7684\u535a\u5ba2","og_description":"\u95ee\u9898 \u6700\u8fd1\u64b8\u4ee3\u7801\u65f6\u53d1\u73b0\u4e00\u4e2a\u8be1\u5f02\u7684\u4e8b\u60c5, \u5176\u4e2d\u7528\u5230\u4e86\u4e00\u4e2a\u5982\u4e0b\u7684\u6570\u636e\u7ed3\u6784 typedef unordered_ma\u2026 Read More &raquo;","og_url":"http:\/\/zsaber.com\/blog\/p\/78","og_site_name":"\u67d0Z\u7684\u535a\u5ba2","article_published_time":"2015-12-18T07:20:40+00:00","article_modified_time":"2019-08-26T07:36:13+00:00","author":"Z","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"Z"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"http:\/\/zsaber.com\/blog\/p\/78#article","isPartOf":{"@id":"http:\/\/zsaber.com\/blog\/p\/78"},"author":{"name":"Z","@id":"http:\/\/zsaber.com\/blog\/#\/schema\/person\/6a6701fc719eff087e24e39a00e2280f"},"headline":"unordered_map \u624b\u52a8\u7ba1\u7406\u5143\u7d20\u5185\u5b58\u65f6\u7684\u6ce8\u610f\u4e8b\u9879","datePublished":"2015-12-18T07:20:40+00:00","dateModified":"2019-08-26T07:36:13+00:00","mainEntityOfPage":{"@id":"http:\/\/zsaber.com\/blog\/p\/78"},"wordCount":19,"commentCount":0,"publisher":{"@id":"http:\/\/zsaber.com\/blog\/#\/schema\/person\/6a6701fc719eff087e24e39a00e2280f"},"articleSection":["C++"],"inLanguage":"zh-Hans","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["http:\/\/zsaber.com\/blog\/p\/78#respond"]}]},{"@type":"WebPage","@id":"http:\/\/zsaber.com\/blog\/p\/78","url":"http:\/\/zsaber.com\/blog\/p\/78","name":"unordered_map \u624b\u52a8\u7ba1\u7406\u5143\u7d20\u5185\u5b58\u65f6\u7684\u6ce8\u610f\u4e8b\u9879 - \u67d0Z\u7684\u535a\u5ba2","isPartOf":{"@id":"http:\/\/zsaber.com\/blog\/#website"},"datePublished":"2015-12-18T07:20:40+00:00","dateModified":"2019-08-26T07:36:13+00:00","breadcrumb":{"@id":"http:\/\/zsaber.com\/blog\/p\/78#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["http:\/\/zsaber.com\/blog\/p\/78"]}]},{"@type":"BreadcrumbList","@id":"http:\/\/zsaber.com\/blog\/p\/78#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"http:\/\/zsaber.com\/blog"},{"@type":"ListItem","position":2,"name":"unordered_map \u624b\u52a8\u7ba1\u7406\u5143\u7d20\u5185\u5b58\u65f6\u7684\u6ce8\u610f\u4e8b\u9879"}]},{"@type":"WebSite","@id":"http:\/\/zsaber.com\/blog\/#website","url":"http:\/\/zsaber.com\/blog\/","name":"\u67d0Z\u7684\u535a\u5ba2","description":"\u7b80\u4ecb\u53c8\u4e0d\u80fd\u5403","publisher":{"@id":"http:\/\/zsaber.com\/blog\/#\/schema\/person\/6a6701fc719eff087e24e39a00e2280f"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"http:\/\/zsaber.com\/blog\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":["Person","Organization"],"@id":"http:\/\/zsaber.com\/blog\/#\/schema\/person\/6a6701fc719eff087e24e39a00e2280f","name":"Z","logo":{"@id":"http:\/\/zsaber.com\/blog\/#\/schema\/person\/image\/"},"description":"\u67d0Z","sameAs":["http:\/\/ZFFramework.com"]}]}},"_links":{"self":[{"href":"http:\/\/zsaber.com\/blog\/wp-json\/wp\/v2\/posts\/78"}],"collection":[{"href":"http:\/\/zsaber.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/zsaber.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/zsaber.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/zsaber.com\/blog\/wp-json\/wp\/v2\/comments?post=78"}],"version-history":[{"count":0,"href":"http:\/\/zsaber.com\/blog\/wp-json\/wp\/v2\/posts\/78\/revisions"}],"wp:attachment":[{"href":"http:\/\/zsaber.com\/blog\/wp-json\/wp\/v2\/media?parent=78"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/zsaber.com\/blog\/wp-json\/wp\/v2\/categories?post=78"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/zsaber.com\/blog\/wp-json\/wp\/v2\/tags?post=78"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}