{"id":207797,"date":"2025-07-08T08:33:36","date_gmt":"2025-07-08T00:33:36","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207797\/"},"modified":"2025-07-08T08:33:36","modified_gmt":"2025-07-08T00:33:36","slug":"golang-%e5%9c%a8-struct-%e6%95%b0%e7%bb%84%e4%b8%ad%e6%90%9c%e7%b4%a2%e7%89%b9%e5%ae%9a%e9%a1%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207797\/","title":{"rendered":"Golang \u5728 Struct \u6570\u7ec4\u4e2d\u641c\u7d22\u7279\u5b9a\u9879"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Golang \u5728 Struct \u6570\u7ec4\u4e2d\u641c\u7d22\u7279\u5b9a\u9879<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-25 17:51:37<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5927\u5bb6\u597d\uff0c\u4eca\u5929\u672c\u4eba\u7ed9\u5927\u5bb6\u5e26\u6765\u6587\u7ae0\u300aGolang \u5728 Struct \u6570\u7ec4\u4e2d\u641c\u7d22\u7279\u5b9a\u9879\u300b<\/span>\uff0c\u6587\u4e2d\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<\/span><\/span>\uff0c\u5982\u679c\u4f60\u5bf9Golang<\/span>\u65b9\u9762\u7684\u77e5\u8bc6\u70b9\u611f\u5174\u8da3\uff0c\u90a3\u5c31\u8bf7\u5404\u4f4d\u670b\u53cb\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427~\u5e0c\u671b\u80fd\u771f\u6b63\u5e2e\u5230\u4f60\u4eec\uff0c\u8c22\u8c22\uff01<\/p>\n

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

\u6211\u6b63\u5728\u5c1d\u8bd5\u627e\u5230\u5728 stuct \u6570\u7ec4\u5185\u641c\u7d22\u7684\u6700\u4f73\u65b9\u6cd5\uff0c\u4ee5\u83b7\u53d6\u5177\u6709\u5143\u7d20 id \u7684\u7279\u5b9a\u9879\u76ee\u3002<\/p>\n

type device struct {\n    addr        net.addr\n    assignedid  int\n    data        string\n}\n\ntype registreddevices struct {\n    alldevices      []device\n}<\/pre>\n
\u73b0\u5728\u6211\u5c31\u8fd9\u6837\u505a<\/p>\n
var currentdevice models.device\nfor _, device := range registreddevices.alldevices {\n    if device.assignedid == id{\n        currentdevice = device\n        }\n}<\/pre>\n
\u6211\u5e0c\u671b\u505a\u4e00\u4e9b\u66f4\u597d\u7684\u4e8b\u60c5\uff0c\u6bd4\u5982\u641c\u7d22\uff0c\u4f46\u6211\u4e0d\u77e5\u9053\u5982\u679c\u627e\u4e0d\u5230\u9879\u76ee\u8be5\u600e\u4e48\u529e\u3002\u56de\u62a5\u5e94\u8be5\u662f\u591a\u5c11\uff1f\u6211\u53ef\u4ee5\u8fd4\u56de nil \u6216\u8005\u6211\u9700\u8981\u8fd4\u56de\u4e00\u4e2a\u7a7a\u8bbe\u5907\u5417\uff1f<\/p>\n
func (registerDevice *RegistredDevices) GetById(id int) Device{\nfor _, device := range registerDevice.AllDevices {\n    if device.AssignedId == id{\n        return device\n    }\n    else{\n       return ?????\n    }\n}\n}\nvar currentDevice = registredDevices.GetById(1)<\/pre>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u8981\u8868\u793a\u672a\u627e\u5230\u9879\u76ee\uff0c\u60a8\u53ef\u4ee5\u8fd4\u56de\u6307\u5411\u9879\u76ee\u7684\u6307\u9488\uff08\u5982\u679c\u672a\u627e\u5230\uff0c\u5219\u4e3a nil<\/code>\uff09\uff0c\u6216\u8005\u4f7f\u7528\u4e24\u4e2a\u5e26\u6709\u9519\u8bef\u6216\u5e03\u5c14\u503c\u7684\u8fd4\u56de\u503c\u3002<\/p>\n
\u4f8b\u5982\uff0c\u5730\u56fe\u67e5\u627e\u8fd4\u56de value\u3001ok<\/code> \u5bf9\u3002 \u4e2d\u7684\u793a\u4f8b\uff1a<\/p>\n
map[k]v \u7c7b\u578b\u7684\u6620\u5c04 a \u4e0a\u7684\u7d22\u5f15\u8868\u8fbe\u5f0f\uff0c\u7528\u4e8e\u7279\u6b8a\u5f62\u5f0f\u7684\u8d4b\u503c\u6216\u521d\u59cb\u5316<\/p>\n
v, ok = a[x]\nv, ok := a[x]\nvar v, ok = a[x]<\/pre>\n
\u4ea7\u751f\u4e00\u4e2a\u989d\u5916\u7684\u65e0\u7c7b\u578b\u5e03\u5c14\u503c\u3002\u5982\u679c\u952e x \u5b58\u5728\u4e8e\u6620\u5c04\u4e2d\uff0c\u5219 ok \u7684\u503c\u4e3a true\uff0c\u5426\u5219\u4e3a false\u3002 <\/p>\n
\u5728\u4f60\u7684\u60c5\u51b5\u4e0b\uff0c\u5b83\u662f\uff1a<\/p>\n
func (registerdevice *registreddevices) getbyid(id int) (device, bool) {\n    for _, device := range registerdevice.alldevices {\n        if device.assignedid == id {\n            return device, true\n        }\n    }\n    return device{}, false\n}<\/pre>\n
\u7136\u540e\uff1a<\/p>\n
if currentDevice, ok := registredDevices.GetById(1); ok {\n    \/\/ found. use currentDevice\n} else {\n    \/\/ not found\n}<\/pre>\n
\u4eca\u5929\u5173\u4e8e\u300aGolang \u5728 Struct \u6570\u7ec4\u4e2d\u641c\u7d22\u7279\u5b9a\u9879\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":"
\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-207797","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207797","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=207797"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207797\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207797"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207797"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207797"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}