{"id":207875,"date":"2025-07-08T14:16:41","date_gmt":"2025-07-08T06:16:41","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207875\/"},"modified":"2025-07-08T14:16:41","modified_gmt":"2025-07-08T06:16:41","slug":"%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%ad%e7%b1%bb%e5%9e%8b%e6%98%af%e5%90%a6%e4%b8%bafloat64","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207875\/","title":{"rendered":"\u5982\u4f55\u5224\u65ad\u7c7b\u578b\u662f\u5426\u4e3afloat64"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u5224\u65ad\u7c7b\u578b\u662f\u5426\u4e3afloat64<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-26 11:51:34<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7\u300a\u5982\u4f55\u5224\u65ad\u7c7b\u578b\u662f\u5426\u4e3afloat64\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>\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\u65b0Golang<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

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

\u6211\u6b63\u5728\u5c1d\u8bd5\u67e5\u627e\u53d8\u91cf\u662f\u5426\u4e3a float64 \u7c7b\u578b\uff1a<\/p>\n

package main\nimport (\"fmt\")\nfunc main() {\n    myvar := 12.34\n    if myvar.(type) == float64 { \n        fmt.println(\"type is float64.\")\n    }\n}<\/pre>\n
\u4f46\u662f\uff0c\u5b83\u4e0d\u8d77\u4f5c\u7528\u5e76\u7ed9\u51fa\u4ee5\u4e0b\u9519\u8bef\uff1a<\/p>\n
.\/rnFindType.go:6:10: use of .(type) outside type switch\n.\/rnFindType.go:6:21: type float64 is not an expression<\/pre>\n
\u95ee\u9898\u662f\u4ec0\u4e48\u4ee5\u53ca\u5982\u4f55\u89e3\u51b3\uff1f<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u60a8\u77e5\u9053 myvar<\/code> \u662f float64<\/code>\uff0c\u56e0\u4e3a\u8be5\u53d8\u91cf\u662f\u4f7f\u7528\u5177\u4f53\u7c7b\u578b float64<\/code> \u58f0\u660e\u7684\u3002 <\/p>\n
\u5982\u679c myvar<\/code> \u662f\u63a5\u53e3\u7c7b\u578b\uff0c\u90a3\u4e48\u60a8\u53ef\u4ee5\u4f7f\u7528 \u6765\u786e\u5b9a\u5177\u4f53\u503c\u662f\u5426\u662f\u67d0\u79cd\u7c7b\u578b\u3002<\/p>\n
var myvar interface{} = 12.34\nif _, ok := myvar.(float64); ok {\n    fmt.Println(\"Type is float64.\")\n}<\/pre>\n
\u62e8\u6253 \u8bd5\u8bd5\u8fd9\u4e2a\u7a0b\u5e8f<\/p>\n
\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u5982\u4f55\u5224\u65ad\u7c7b\u578b\u662f\u5426\u4e3afloat64\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591aGolang\u77e5\u8bc6\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-207875","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207875","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=207875"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207875\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207875"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207875"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}