{"id":3708,"date":"2022-12-30T13:42:55","date_gmt":"2022-12-30T05:42:55","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3708"},"modified":"2022-12-30T13:42:55","modified_gmt":"2022-12-30T05:42:55","slug":"%e5%ad%b8%e7%bf%92go%e8%aa%9e%e8%a8%80%e4%b8%ad%e7%9a%84select%e8%aa%9e%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/go\/%e5%ad%b8%e7%bf%92go%e8%aa%9e%e8%a8%80%e4%b8%ad%e7%9a%84select%e8%aa%9e%e5%8f%a5\/","title":{"rendered":"\u5b78\u7fd2Go\u8a9e\u8a00\u4e2d\u7684Select\u8a9e\u53e5"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"Go, select\"><\/p>\n<p>Go \u8a9e\u8a00\u7684 select \u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u8a9e\u6cd5\uff0c\u5b83\u53ef\u4ee5\u8b93\u4f60\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u5207\u63db\uff0c\u4ee5\u53ca\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u8b80\u53d6\u548c\u5beb\u5165\u7684\u52d5\u4f5c\u3002\u5728 Go \u8a9e\u8a00\u4e2d\uff0cselect \u53ef\u4ee5\u8b93\u4f60\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u5207\u63db\uff0c\u4ee5\u53ca\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u8b80\u53d6\u548c\u5beb\u5165\u7684\u52d5\u4f5c\u3002<\/p>\n<h2>Go \u8a9e\u8a00\u4e2d\u7684 select \u8a9e\u6cd5<\/h2>\n<p>Go \u8a9e\u8a00\u4e2d\u7684 select \u8a9e\u6cd5\u53ef\u4ee5\u8b93\u4f60\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u5207\u63db\uff0c\u4ee5\u53ca\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u8b80\u53d6\u548c\u5beb\u5165\u7684\u52d5\u4f5c\u3002\u5b83\u53ef\u4ee5\u8b93\u4f60\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u5207\u63db\uff0c\u4ee5\u53ca\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u8b80\u53d6\u548c\u5beb\u5165\u7684\u52d5\u4f5c\u3002<\/p>\n<h2>Go \u8a9e\u8a00\u4e2d\u7684 select \u7684\u7bc4\u4f8b<\/h2>\n<p>\u4e0b\u9762\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u53ef\u4ee5\u8b93\u4f60\u66f4\u6e05\u695a\u5730\u4e86\u89e3 Go \u8a9e\u8a00\u4e2d\u7684 select \u8a9e\u6cd5\uff1a<\/p>\n<pre class=\"brush: go\">\npackage main\n\nimport (\n    \"fmt\"\n    \"time\"\n)\n\nfunc main() {\n    c1 := make(chan string)\n    c2 := make(chan string)\n\n    go func() {\n        time.Sleep(time.Second * 1)\n        c1 <- \"one\"\n    }()\n    go func() {\n        time.Sleep(time.Second * 2)\n        c2 <- \"two\"\n    }()\n\n    for i := 0; i < 2; i++ {\n        select {\n        case msg1 := <-c1:\n            fmt.Println(\"received\", msg1)\n        case msg2 := <-c2:\n            fmt.Println(\"received\", msg2)\n        }\n    }\n}\n<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u6709\u5169\u500b channel\uff0c\u5206\u5225\u70ba c1 \u548c c2\uff0c\u6211\u5011\u5728\u5169\u500b channel \u4e2d\u5206\u5225\u57f7\u884c\u4e86\u5169\u500b goroutine\uff0c\u5206\u5225\u5728 1 \u79d2\u548c 2 \u79d2\u5f8c\u5411 channel \u4e2d\u5beb\u5165\u8cc7\u6599\u3002\u7136\u5f8c\u6211\u5011\u4f7f\u7528 select \u8a9e\u6cd5\uff0c\u5728\u5169\u500b channel \u4e2d\u505a\u5207\u63db\uff0c\u4e26\u4e14\u5f9e channel \u4e2d\u8b80\u53d6\u8cc7\u6599\u3002<\/p>\n<p><!--more--><\/p>\n<h2>Go \u8a9e\u8a00\u4e2d\u7684 select \u7684\u512a\u9ede<\/h2>\n<p>Go \u8a9e\u8a00\u4e2d\u7684 select \u8a9e\u6cd5\u6709\u8a31\u591a\u512a\u9ede\uff0c\u5176\u4e2d\u6700\u91cd\u8981\u7684\u662f\u53ef\u4ee5\u8b93\u4f60\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u5207\u63db\uff0c\u4ee5\u53ca\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u8b80\u53d6\u548c\u5beb\u5165\u7684\u52d5\u4f5c\u3002\u53e6\u5916\uff0c\u5b83\u9084\u53ef\u4ee5\u8b93\u4f60\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u8b80\u53d6\u548c\u5beb\u5165\u7684\u52d5\u4f5c\uff0c\u4ee5\u53ca\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u5207\u63db\uff0c\u4ee5\u53ca\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u8b80\u53d6\u548c\u5beb\u5165\u7684\u52d5\u4f5c\u3002<\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>Go \u8a9e\u8a00\u4e2d\u7684 select \u8a9e\u6cd5\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u8a9e\u6cd5\uff0c\u5b83\u53ef\u4ee5\u8b93\u4f60\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u5207\u63db\uff0c\u4ee5\u53ca\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u8b80\u53d6\u548c\u5beb\u5165\u7684\u52d5\u4f5c\u3002\u5b83\u6709\u8a31\u591a\u512a\u9ede\uff0c\u53ef\u4ee5\u8b93\u4f60\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u5207\u63db\uff0c\u4ee5\u53ca\u5728\u591a\u500b channel \u4e4b\u9593\u505a\u8b80\u53d6\u548c\u5beb\u5165\u7684\u52d5\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2Go\u8a9e\u8a00\u4e2d\u7684Select\u8a9e\u53e5\uff0c\u4e86\u89e3\u5b83\u7684\u529f\u80fd\u548c\u4f7f\u7528\u65b9\u6cd5\uff0c\u638c\u63e1\u5b83\u7684\u57fa\u672c\u6982\u5ff5\uff0c\u4e26\u5b78\u7fd2\u5982\u4f55\u5728Go\u8a9e\u8a00\u4e2d\u4f7f\u7528\u5b83\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[171,172],"tags":[169,170],"class_list":["post-3708","post","type-post","status-publish","format-standard","hentry","category-go","category-golang","tag-go","tag-golang"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-XO","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3708","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=3708"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3708\/revisions"}],"predecessor-version":[{"id":3709,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3708\/revisions\/3709"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=3708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}