{"id":207678,"date":"2025-07-08T11:11:55","date_gmt":"2025-07-08T03:11:55","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207678\/"},"modified":"2025-07-08T11:11:55","modified_gmt":"2025-07-08T03:11:55","slug":"%e5%a6%82%e4%bd%95%e4%bb%8e%e5%9c%b0%e5%9b%be%e7%95%8c%e9%9d%a2%e8%8e%b7%e5%8f%96-%e8%ae%be%e7%bd%ae%e5%80%bc%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207678\/","title":{"rendered":"\u5982\u4f55\u4ece\u5730\u56fe\u754c\u9762\u83b7\u53d6\/\u8bbe\u7f6e\u503c\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u4ece\u5730\u56fe\u754c\u9762\u83b7\u53d6\/\u8bbe\u7f6e\u503c\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-24 16:03:33<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5b66\u4e60Golang<\/span>\u8981\u52aa\u529b\uff0c\u4f46\u662f\u4e0d\u8981\u6025\uff01\u4eca\u5929\u7684\u8fd9\u7bc7\u6587\u7ae0\u300a\u5982\u4f55\u4ece\u5730\u56fe\u754c\u9762\u83b7\u53d6\/\u8bbe\u7f6e\u503c\uff1f\u300b<\/span>\u5c06\u4f1a\u4ecb\u7ecd\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u60f3\u6df1\u5165\u5b66\u4e60Golang<\/span>\uff0c\u53ef\u4ee5\u5173\u6ce8\u6211\uff01\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\u7684\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u80fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u8fd9\u5c31\u662f\u6211\u6b63\u5728\u5c1d\u8bd5\u505a\u7684\u4e8b\u60c5\u3002<\/p>\n

person := map[string]int {\n    \"age\": 20,\n}\nvar p interface{} = person\nv := reflect.ValueOf(p)\n\/\/ I want to get\/set the value of age here from v e.g. v[\"age\"]\n\/\/ how can I do that<\/pre>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u4e0d\u9700\u8981\u4f7f\u7528reflect<\/code>\uff0c\u53ef\u4ee5\u505a\u7c7b\u578b\u65ad\u8a00\uff1a<\/p>\n
person := map[string]int{\n    \"age\": 20,\n}\nvar p interface{} = person\nage := p.(map[string]int)[\"age\"] \/\/ get\np.(map[string]int)[\"something\"] = 10 \/\/set<\/pre>\n
\u7f16\u8f91\uff1a\u60a8\u7684\u95ee\u9898\u4f3c\u4e4e\u662f\u5173\u4e8e\u60a8\u4e0d\u77e5\u9053\u6620\u5c04\u952e\/\u503c\u7c7b\u578b\u7684\u60c5\u51b5\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u5faa\u73af\u904d\u5386\u5730\u56fe\u5143\u7d20\uff1a<\/p>\n
v := reflect.valueof(p)\nitr := v.maprange()\nfor itr.next() {\n    fmt.println(itr.key(), itr.value())\n}<\/pre>\n
\u6216\u8005\uff0c\u5982\u679c\u60a8\u9700\u8981\u7279\u5b9a\u5143\u7d20\uff0c\u8bf7\u4f7f\u7528\uff1a<\/p>\n
v.mapindex(reflect.valueof(\"age\")) \/\/ returns 20<\/pre>\n
\u6b64\u5916\uff0c\u4e3a\u4e86\u8bbe\u7f6e\u65b0\u503c\uff0c\u60a8\u53ef\u4ee5\uff1a<\/p>\n
v.SetMapIndex(reflect.ValueOf(\"somekey\"), reflect.ValueOf(7))<\/pre>\n
\u4eca\u5929\u5173\u4e8e\u300a\u5982\u4f55\u4ece\u5730\u56fe\u754c\u9762\u83b7\u53d6\/\u8bbe\u7f6e\u503c\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/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-207678","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207678","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=207678"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207678\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207678"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207678"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207678"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}