{"id":44323,"date":"2023-02-14T15:48:59","date_gmt":"2023-09-04T04:48:20","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/golang%e7%9a%84%e4%b8%80%e4%ba%9b%e5%b0%8f%e6%8a%80%e5%b7%a7\/"},"modified":"2024-04-29T14:36:18","modified_gmt":"2024-04-29T06:36:18","slug":"golang%e7%9a%84%e4%b8%80%e4%ba%9b%e5%b0%8f%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/golang%e7%9a%84%e4%b8%80%e4%ba%9b%e5%b0%8f%e6%8a%80%e5%b7%a7\/","title":{"rendered":"Golang\u7684\u4e00\u4e9b\u5c0f\u6280\u5de7"},"content":{"rendered":"<h2>\u9996\u5148<\/h2>\n<ul class=\"post-ul\">\u3044\u308d\u3044\u308d\u3068\u6c17\u3065\u3044\u305f\u3053\u3068\u3092\u9806\u4e0d\u540c\u3067\u96d1\u591a\u306b\u307e\u3068\u3081\u307e\u3059\u3002<\/ul>\n<h2>\u603b\u4e4b<\/h2>\n<p>time.Unix \u306f nanosec \u3060\u3051\u6e21\u305b\u3070\u3088\u3044<br \/>\nyaml \u3068 json \u306ekey\u540d\u6307\u5b9a\u3092\u540c\u3058\u30bf\u30b0\u3067\u6307\u5b9a\u3059\u308b<\/p>\n<p>for range \u3067\u53d6\u308a\u51fa\u3057\u305f\u8981\u7d20\u3092\u5909\u66f4\u3059\u308b<br \/>\n\u610f\u5916\u3068\u521d\u671f\u5316\u3057\u306a\u304f\u3066\u3082\u4f7f\u3048\u308b\u3082\u306e\u305f\u3061<\/p>\n<h2>Content:<\/h2>\n<h3>\u53ea\u9700\u4f20\u9012nanosec\uff0ctime.Unix\u5c06\u517c\u5bb9\u3002<\/h3>\n<p>sec \u3068 nsec \u306b\u308f\u3056\u308f\u3056\u5206\u5272\u3057\u3066\u6e21\u3057\u3066\u3082\u3044\u3044\u304c<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">now<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Now<\/span><span class=\"p\">()<\/span>\r\n<span class=\"n\">unix<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">now<\/span><span class=\"o\">.<\/span><span class=\"n\">UnixNano<\/span><span class=\"p\">()<\/span>\r\n\r\n<span class=\"n\">sec<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">unix<\/span><span class=\"o\">\/<\/span><span class=\"m\">1e9<\/span>\r\n<span class=\"n\">nsec<\/span> <span class=\"o\">:=<\/span> <span class=\"p\">(<\/span><span class=\"n\">nsec<\/span> <span class=\"o\">-<\/span> <span class=\"n\">sec<\/span><span class=\"o\">*<\/span><span class=\"m\">1e9<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Unix<\/span><span class=\"p\">(<\/span><span class=\"n\">sec<\/span><span class=\"p\">,<\/span> <span class=\"n\">nsec<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>sec=0 \u306b\u3057\u3066 nsec \u3060\u3051\u6e21\u305b\u3070OK<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">now<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Now<\/span><span class=\"p\">()<\/span>\r\n<span class=\"n\">nano<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">now<\/span><span class=\"o\">.<\/span><span class=\"n\">UnixNano<\/span><span class=\"p\">()<\/span>\r\n<span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Unix<\/span><span class=\"p\">(<\/span><span class=\"m\">0<\/span><span class=\"p\">,<\/span> <span class=\"n\">nano<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<h3>\u4f7f\u7528\u76f8\u540c\u6807\u7b7e\u6307\u5b9aYAML\u548cJSON\u4e2d\u7684\u952e\u540d\u3002<\/h3>\n<p>\u5bf9\u4e8e\u89e3\u6790 YAML\uff0c\u6211\u4eec\u901a\u5e38\u4f1a\u4f7f\u7528 go-yaml\/yaml\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u5206\u522b\u4f7f\u7528 json \u548c yaml \u6807\u7b7e\u7f16\u5199\u76f8\u5e94\u7684\u6807\u7b7e\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">Person<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">FirstName<\/span> <span class=\"kt\">string<\/span> <span class=\"s\">`json:\"first_name\" yaml:\"first_name`<\/span>\r\n    <span class=\"n\">LastName<\/span>  <span class=\"kt\">string<\/span> <span class=\"s\">`json:\"last_name\" yaml:\"last_name\"`<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5982\u679c\u4f7f\u7528ghodss\/yaml\u6765\u4ee3\u66ff\uff0c\u5c31\u53ef\u4ee5\u5728json\u6807\u8bb0\u4e2d\u5b9e\u73b0\u5171\u7528\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">Person<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">FirstName<\/span> <span class=\"kt\">string<\/span> <span class=\"s\">`json:\"first_name\"`<\/span>\r\n    <span class=\"n\">LastName<\/span>  <span class=\"kt\">string<\/span> <span class=\"s\">`json:\"last_name\"`<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">p<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">Person<\/span><span class=\"p\">{<\/span>\r\n        <span class=\"n\">FirstName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Tarou\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">LastName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Yamada\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"n\">bs<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">yaml<\/span><span class=\"o\">.<\/span><span class=\"n\">Unmarshal<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">p<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">err<\/span> <span class=\"o\">!=<\/span> <span class=\"no\">nil<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"n\">Panicf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"error: %#v\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%s\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">bs<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"c\">\/\/ first_name: Tarou<\/span>\r\n    <span class=\"c\">\/\/ last_name: Yamada<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u4fee\u6539\u7528\u4e8e\u8303\u56f4\u7684\u5143\u7d20\u3002<\/h3>\n<ul class=\"post-ul\">\u5f53\u305f\u308a\u524d\u3063\u3061\u3083\u5f53\u305f\u308a\u524d\u3067\u3059\u304c\u3001\u53d6\u308a\u51fa\u3057\u305f\u8981\u7d20\u3092\u305d\u306e\u307e\u307e\u66f4\u65b0\u3057\u3066\u3082\u5909\u308f\u308a\u307e\u305b\u3093<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">Person<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">FirstName<\/span> <span class=\"kt\">string<\/span>\r\n    <span class=\"n\">LastName<\/span>  <span class=\"kt\">string<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"n\">persons<\/span> <span class=\"o\">:=<\/span> <span class=\"p\">[]<\/span><span class=\"n\">Person<\/span><span class=\"p\">{<\/span>\r\n    <span class=\"p\">{<\/span><span class=\"n\">FirstName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Taro\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">LastName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Yamada\"<\/span><span class=\"p\">},<\/span>\r\n    <span class=\"p\">{<\/span><span class=\"n\">FirstName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Hanako\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">LastName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Tanaka\"<\/span><span class=\"p\">},<\/span>\r\n    <span class=\"p\">{<\/span><span class=\"n\">FirstName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Ichiro\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">LastName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Suzuki\"<\/span><span class=\"p\">},<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">for<\/span> <span class=\"n\">_<\/span><span class=\"p\">,<\/span> <span class=\"n\">p<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"n\">persons<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">p<\/span><span class=\"o\">.<\/span><span class=\"n\">LastName<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"Takahashi\"<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"n\">persons<\/span><span class=\"p\">)<\/span>\r\n<span class=\"c\">\/\/ [{Taro Yamada} {Hanako Tanaka} {Ichiro Suzuki}]<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u5909\u66f4\u3057\u305f\u3051\u308c\u3070\u3001 persons[i] \u3092\u66f4\u65b0\u3059\u308b<\/ul>\n<pre class=\"post-pre\"><code><span class=\"n\">persons<\/span> <span class=\"o\">=<\/span> <span class=\"n\">persons0<\/span>\r\n<span class=\"k\">for<\/span> <span class=\"n\">i<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"n\">persons<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">persons<\/span><span class=\"p\">[<\/span><span class=\"n\">i<\/span><span class=\"p\">]<\/span><span class=\"o\">.<\/span><span class=\"n\">LastName<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"Takahashi\"<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"n\">persons<\/span><span class=\"p\">)<\/span>\r\n<span class=\"c\">\/\/ [{Taro Takahashi} {Hanako Takahashi} {Ichiro Takahashi}]<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">pointer\u914d\u5217\u306e\u5834\u5408\u306f\u305d\u306e\u307e\u307e\u5909\u66f4\u304c\u3067\u304d\u308b<\/ul>\n<pre class=\"post-pre\"><code><span class=\"n\">ppersons<\/span> <span class=\"o\">:=<\/span> <span class=\"p\">[]<\/span><span class=\"o\">*<\/span><span class=\"n\">Person<\/span><span class=\"p\">{<\/span>\r\n    <span class=\"p\">{<\/span><span class=\"n\">FirstName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Taro\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">LastName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Yamada\"<\/span><span class=\"p\">},<\/span>\r\n    <span class=\"p\">{<\/span><span class=\"n\">FirstName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Hanako\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">LastName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Tanaka\"<\/span><span class=\"p\">},<\/span>\r\n    <span class=\"p\">{<\/span><span class=\"n\">FirstName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Ichiro\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">LastName<\/span><span class=\"o\">:<\/span> <span class=\"s\">\"Suzuki\"<\/span><span class=\"p\">},<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">for<\/span> <span class=\"n\">_<\/span><span class=\"p\">,<\/span> <span class=\"n\">p<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"n\">ppersons<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">p<\/span><span class=\"o\">.<\/span><span class=\"n\">LastName<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"Takahashi\"<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"k\">for<\/span> <span class=\"n\">_<\/span><span class=\"p\">,<\/span> <span class=\"n\">p<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"n\">ppersons<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"o\">*<\/span><span class=\"n\">p<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"c\">\/\/ {Taro Takahashi}<\/span>\r\n<span class=\"c\">\/\/ {Hanako Takahashi}<\/span>\r\n<span class=\"c\">\/\/ {Ichiro Takahashi}<\/span>\r\n<\/code><\/pre>\n<h3>\u4e00\u4e9b\u4e1c\u897f\u5373\u4f7f\u4e0d\u8fdb\u884c\u521d\u59cb\u5316\u4e5f\u53ef\u4ee5\u4f7f\u7528\u3002<\/h3>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">sync.Mutex<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">sync.WaitGroup<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">errgroup.Group<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30b9\u30e9\u30a4\u30b9<\/ul>\n<p>\u203b \u5982\u679c\u4e00\u4e2a\u6620\u5c04(map)\u662f\u7a7a\u7684(nil)\uff0c\u5219\u5728\u6dfb\u52a0\u5143\u7d20\u65f6\u4f1a\u5f15\u53d1panic\u5f02\u5e38\uff0c\u4f46\u5982\u679c\u4e00\u4e2a\u5207\u7247(slice)\u662f\u7a7a\u7684(nil)\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528append\u51fd\u6570\u6dfb\u52a0\u5143\u7d20\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">var<\/span> <span class=\"n\">slice0<\/span> <span class=\"p\">[]<\/span><span class=\"kt\">int<\/span>\r\n<span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%#v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">slice0<\/span><span class=\"p\">)<\/span> <span class=\"c\">\/\/ []int(nil)<\/span>\r\n<span class=\"n\">slice0<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">append<\/span><span class=\"p\">(<\/span><span class=\"n\">slice0<\/span><span class=\"p\">,<\/span> <span class=\"m\">0<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%#v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">slice0<\/span><span class=\"p\">)<\/span> <span class=\"c\">\/\/ []int{0}<\/span>\r\n\r\n<span class=\"n\">slice1<\/span> <span class=\"o\">:=<\/span> <span class=\"p\">[]<\/span><span class=\"kt\">int<\/span><span class=\"p\">{}<\/span>\r\n<span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%#v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">slice1<\/span><span class=\"p\">)<\/span> <span class=\"c\">\/\/ []int{}<\/span>\r\n<span class=\"n\">slice1<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">append<\/span><span class=\"p\">(<\/span><span class=\"n\">slice1<\/span><span class=\"p\">,<\/span> <span class=\"m\">0<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%#v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">slice1<\/span><span class=\"p\">)<\/span> <span class=\"c\">\/\/ []int{0}<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u3044\u308d\u3044\u308d\u3068\u6c17\u3065\u3044\u305f\u3053\u3068\u3092\u9806\u4e0d\u540c\u3067\u96d1\u591a\u306b\u307e\u3068\u3081\u307e\u3059\u3002 \u603b\u4e4b time.Unix \u306f nanosec \u3060\u3051\u6e21 [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44323","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Golang\u7684\u4e00\u4e9b\u5c0f\u6280\u5de7 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/golang\u7684\u4e00\u4e9b\u5c0f\u6280\u5de7\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Golang\u7684\u4e00\u4e9b\u5c0f\u6280\u5de7\" 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