{"id":207634,"date":"2025-07-08T11:31:50","date_gmt":"2025-07-08T03:31:50","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207634\/"},"modified":"2025-07-08T11:31:50","modified_gmt":"2025-07-08T03:31:50","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88%e6%88%91%e4%b8%8d%e8%83%bd%e5%9c%a8-go-%e4%b8%ad%e4%bd%bf%e7%94%a8-new-%e5%88%9d%e5%a7%8b%e5%8c%96%e5%9c%b0%e5%9b%be%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207634\/","title":{"rendered":"\u4e3a\u4ec0\u4e48\u6211\u4e0d\u80fd\u5728 Go \u4e2d\u4f7f\u7528 new() \u521d\u59cb\u5316\u5730\u56fe\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>\u4e3a\u4ec0\u4e48\u6211\u4e0d\u80fd\u5728 Go \u4e2d\u4f7f\u7528 new() \u521d\u59cb\u5316\u5730\u56fe\uff1f<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-24 10:00:27<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u4e3a\u4ec0\u4e48\u6211\u4e0d\u80fd\u5728 Go \u4e2d\u4f7f\u7528 new() \u521d\u59cb\u5316\u5730\u56fe\uff1f\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<pre>package main\n\nimport \"fmt\"\n\nfunc main() {\n    p := new(map[string]int)\n    m := make(map[string]int)\n    m[\"in m\"] = 2\n    (*p)[\"in p\"] = 1\n    fmt.Println(m)\n    fmt.Println(*p)\n}<\/pre>\n<p>\u4e0a\u9762\u7684\u4ee3\u7801\u7ed9\u51fa\u4e86\u4e00\u4e2a\u9519\u8bef<code>panic\uff1a\u8d4b\u503c\u7ed9nil map<\/code>\u4e2d\u7684\u6761\u76ee\u3002\u5982\u679c\u6211\u5728\u5c06\u5bf9\u63d2\u5165\u4e4b\u524d\u6253\u5370 <code>*p<\/code> \uff0c\u5219\u8f93\u51fa\u662f\u6b63\u786e\u7684\u3002\u770b\u6765\u6211\u5c31\u662f\u65e0\u6cd5\u4fee\u6539 <code>*p<\/code>\uff1f<\/p>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p><code>new<\/code> \u548c <code>make<\/code> \u90fd\u7528\u4e8e\u5728\u7a0b\u5e8f\u4e2d\u5206\u914d\u5185\u5b58\uff0c\u4f46\u5b83\u4eec\u7684\u5de5\u4f5c\u65b9\u5f0f\u4e0d\u540c\u3002 <code>new(T, args)<\/code> \u5c06\u5185\u5b58\u6e05\u96f6\u5e76\u8fd4\u56de\u5185\u5b58\u5730\u5740\uff08<code>*T<\/code> \u7c7b\u578b\u7684\u503c\uff09\uff0c\u4f46\u4e0d\u521d\u59cb\u5316\u8be5\u5185\u5b58\u3002\u53e6\u4e00\u65b9\u9762\uff0c<code>make(T, args)<\/code> \u521d\u59cb\u5316 <code>T<\/code> \u7c7b\u578b\u7684\u503c\u3002\u5730\u56fe\u9700\u8981\u521d\u59cb\u5316\uff0c\u56e0\u4e3a\u867d\u7136\u5730\u56fe\u53ef\u4ee5\u4e3a\u7a7a\uff0c\u4f46\u5730\u56fe\u672c\u8eab\u7684\u7ed3\u6784\u4ecd\u7136\u662f\u975e\u96f6\u7684\uff0c\u56e0\u6b64\u9700\u8981\u5728\u4f7f\u7528\u524d\u521d\u59cb\u5316\u3002<\/p>\n<p>\u6765\u81ea\uff1a<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u4e3a\u4ec0\u4e48\u6211\u4e0d\u80fd\u5728 Go \u4e2d\u4f7f\u7528 new() \u521d\u59cb\u5316\u5730\u56fe\uff1f\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207634","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207634","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207634"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207634\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207634"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207634"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}