{"id":44549,"date":"2023-07-31T23:05:36","date_gmt":"2024-02-05T11:20:52","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%ad%a3%e7%a1%ae%e8%a7%a3%e7%ad%94a-tour-of-go%e7%9a%84%e7%bb%83%e4%b9%a0%e9%97%ae%e9%a2%98%e3%80%82\/"},"modified":"2024-04-30T16:22:13","modified_gmt":"2024-04-30T08:22:13","slug":"%e6%ad%a3%e7%a1%ae%e8%a7%a3%e7%ad%94a-tour-of-go%e7%9a%84%e7%bb%83%e4%b9%a0%e9%97%ae%e9%a2%98%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%ad%a3%e7%a1%ae%e8%a7%a3%e7%ad%94a-tour-of-go%e7%9a%84%e7%bb%83%e4%b9%a0%e9%97%ae%e9%a2%98%e3%80%82\/","title":{"rendered":"\u6b63\u786e\u89e3\u7b54A Tour of Go\u7684\u7ec3\u4e60\u95ee\u9898"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<p>\u6211\u8ba4\u4e3a\u300aGo\u4e4b\u65c5\u300b\u662f\u4e00\u672c\u5f88\u597d\u7684\u5165\u95e8\u6559\u6750\uff0c\u4f46\u662f\u5728\u7ec3\u4e60\u95ee\u9898\u4e2d\uff0c\u6709\u4e9b\u95ee\u9898\u521d\u6b21\u770b\u5230\u65f6\u611f\u5230\u5f88\u96be\u3002\u6709\u4e9b\u95ee\u9898\u5373\u4f7f\u67e5\u4e86\u4e5f\u5f88\u96be\u627e\u5230\u80fd\u76f4\u63a5\u8fd0\u884c\u7684\u7b54\u6848\uff0c\u6240\u4ee5\u6211\u60f3\u7559\u4e0b\u7b54\u6848\u4f9b\u65e5\u540e\u53c2\u8003\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u305d\u306e\u307e\u307e\u30b3\u30d4\u30fc\u3057\u3066\u6b63\u3057\u304f\u52d5\u304f<\/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\">\u5fc5\u8981\u306a\u3044\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f7f\u308f\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u306a\u308b\u3079\u304f\u30b7\u30f3\u30d7\u30eb\u306b\u66f8\u304f<\/ul>\n<p>\u6211\u4eec\u5c06\u91c7\u53d6\u4ee5\u4e0b\u89e3\u7b54\u7b56\u7565\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u5176\u4ed6\u627e\u5230\u7684\u7b54\u6848\u94fe\u63a5\uff1a<br \/>\n&#8211; https:\/\/qiita.com\/kroton\/items\/8622d5e9e38ff822070c<br \/>\n&#8211; https:\/\/gist.github.com\/zyxar\/2317744<br \/>\n&#8211; https:\/\/github.com\/golang\/tour\/tree\/master\/solutions<br \/>\n&#8211; http:\/\/takatoshiono.hatenablog.com\/entry\/2016\/09\/08\/001823<br \/>\n&#8211; http:\/\/blog.yuuk.io\/entry\/2014\/02\/16\/183206<\/p>\n<h1>\u7ec3\u4e60\uff1a\u5faa\u73af\u548c\u51fd\u6570<\/h1>\n<p>\u4f5c\u4e3a\u4f7f\u7528\u51fd\u6570\u548c\u5faa\u73af\u7684\u7b80\u5355\u7ec3\u4e60\uff0c\u8ba9\u6211\u4eec\u5c1d\u8bd5\u4f7f\u7528\u725b\u987f\u6cd5\u6765\u8ba1\u7b97\u5e73\u65b9\u6839\u3002&#8230;\u95ee\u9898\u94fe\u63a5\uff1ahttps:\/\/go-tour-jp.appspot.com\/flowcontrol\/8<\/p>\n<h2>\u53ea\u91cd\u590d10\u6b21<\/h2>\n<p>\u8bf7\u6700\u521d\u5c06\u8be5\u8ba1\u7b97\u516c\u5f0f\u5faa\u73af\u8fdb\u884c10\u6b21\uff0c\u68c0\u67e5\u5bf9\u4e8e\u5404\u4e2a\u4e0d\u540c\u7684x\u503c\uff08\u59821\u30012\u30013\u7b49\uff09\u7ed3\u679c\u4e0e\u6b63\u786e\u503c\u7684\u63a5\u8fd1\u7a0b\u5ea6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"fmt\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">Sqrt<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span> <span class=\"kt\">float64<\/span><span class=\"p\">)<\/span> <span class=\"kt\">float64<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">z<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">1.0<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">i<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">0<\/span><span class=\"p\">;<\/span> <span class=\"n\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"m\">10<\/span><span class=\"p\">;<\/span> <span class=\"n\">i<\/span><span class=\"o\">++<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">z<\/span> <span class=\"o\">-=<\/span> <span class=\"p\">(<\/span><span class=\"n\">z<\/span><span class=\"o\">*<\/span><span class=\"n\">z<\/span> <span class=\"o\">-<\/span> <span class=\"n\">x<\/span><span class=\"p\">)<\/span> <span class=\"o\">\/<\/span> <span class=\"p\">(<\/span><span class=\"m\">2<\/span> <span class=\"o\">*<\/span> <span class=\"n\">z<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">z<\/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\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"n\">Sqrt<\/span><span class=\"p\">(<\/span><span class=\"m\">2<\/span><span class=\"p\">))<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<h2>\u5982\u679c\u4e0e\u524d\u4e00\u523b\u7684\u5dee\u8ddd\u53d8\u5c0f\u5c31\u505c\u4e0b\u6765\u3002<\/h2>\n<p>\u8bf7\u5c1d\u8bd5\u4fee\u6539\u5faa\u73af\uff0c\u4ee5\u4fbf\u5728\u5faa\u73af\u4e4b\u524d\u8ba1\u7b97\u51fa\u7684\u53d8\u91cfz\u7684\u503c\u4e0d\u518d\u6539\u53d8\uff08\u6216\u8005\u53d8\u5316\u975e\u5e38\u5c0f\uff09\u65f6\u505c\u6b62\u5faa\u73af\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"fmt\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">Sqrt<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span> <span class=\"kt\">float64<\/span><span class=\"p\">)<\/span> <span class=\"kt\">float64<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">z<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">1.0<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">d<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">1.0<\/span><span class=\"p\">;<\/span> <span class=\"n\">d<\/span><span class=\"o\">*<\/span><span class=\"n\">d<\/span> <span class=\"o\">&gt;<\/span> <span class=\"m\">1e-10<\/span><span class=\"p\">;<\/span> <span class=\"n\">z<\/span> <span class=\"o\">-=<\/span> <span class=\"n\">d<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">d<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"n\">z<\/span><span class=\"o\">*<\/span><span class=\"n\">z<\/span> <span class=\"o\">-<\/span> <span class=\"n\">x<\/span><span class=\"p\">)<\/span> <span class=\"o\">\/<\/span> <span class=\"p\">(<\/span><span class=\"m\">2<\/span> <span class=\"o\">*<\/span> <span class=\"n\">z<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">z<\/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\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"n\">Sqrt<\/span><span class=\"p\">(<\/span><span class=\"m\">2<\/span><span class=\"p\">))<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<h1>Exercise: \u5207\u7247 (Qi\u0113<\/h1>\n<p>\u6211\u4eec\u6765\u5b9e\u73b0Pic\u51fd\u6570\u3002\u5f53\u6211\u4eec\u6267\u884c\u8fd9\u4e2a\u7a0b\u5e8f\u65f6\uff0c\u5e94\u8be5\u4f1a\u5728\u4e0b\u65b9\u663e\u793a\u751f\u6210\u7684\u56fe\u50cf\u3002\u8fd9\u4e2a\u51fd\u6570\u9700\u8981\u5b9e\u73b0\u5c06\u4e00\u4e2a\u957f\u5ea6\u4e3ady\u7684\u5207\u7247\u5206\u914d\u7ed9\u4e00\u4e2a\u957f\u5ea6\u4e3adx\u7684\u5207\u7247\uff0c\u5176\u4e2d\u6bcf\u4e2a\u5143\u7d20\u662f8\u4f4d\u65e0\u7b26\u53f7\u6574\u6570\u7c7b\u578b\u3002\u56fe\u50cf\u5c06\u88ab\u89e3\u91ca\u4e3a\u7070\u5ea6\u56fe\u50cf\uff08\u5b9e\u9645\u4e0a\u662f\u84dd\u9ed1\u56fe\u50cf\uff09&#8230;\u95ee\u9898\u8be6\u60c5\u8bf7\u53c2\u8003https:\/\/go-tour-jp.appspot.com\/moretypes\/18\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"s\">\"golang.org\/x\/tour\/pic\"<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">Pic<\/span><span class=\"p\">(<\/span><span class=\"n\">dx<\/span><span class=\"p\">,<\/span> <span class=\"n\">dy<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"p\">[][]<\/span><span class=\"kt\">uint8<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">pic<\/span> <span class=\"o\">:=<\/span> <span class=\"nb\">make<\/span><span class=\"p\">([][]<\/span><span class=\"kt\">uint8<\/span><span class=\"p\">,<\/span> <span class=\"n\">dy<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">y<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"n\">pic<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">pic<\/span><span class=\"p\">[<\/span><span class=\"n\">y<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">make<\/span><span class=\"p\">([]<\/span><span class=\"kt\">uint8<\/span><span class=\"p\">,<\/span> <span class=\"n\">dx<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"n\">x<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"n\">pic<\/span><span class=\"p\">[<\/span><span class=\"n\">y<\/span><span class=\"p\">]<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"n\">pic<\/span><span class=\"p\">[<\/span><span class=\"n\">y<\/span><span class=\"p\">][<\/span><span class=\"n\">x<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"kt\">uint8<\/span><span class=\"p\">((<\/span><span class=\"n\">x<\/span> <span class=\"o\">+<\/span> <span class=\"n\">y<\/span><span class=\"p\">)<\/span> <span class=\"o\">\/<\/span> <span class=\"m\">2<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">pic<\/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\">pic<\/span><span class=\"o\">.<\/span><span class=\"n\">Show<\/span><span class=\"p\">(<\/span><span class=\"n\">Pic<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<h1>\u7ec3\u4e60\uff1a\u5730\u56fe<\/h1>\n<p>\u8ba9\u6211\u4eec\u6765\u5b9e\u73b0\u4e00\u4e2a WordCount \u51fd\u6570\u5427\u3002\u8be5\u51fd\u6570\u9700\u8981\u63a5\u6536\u4e00\u4e2a\u5b57\u7b26\u4e32 s \u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u8bb0\u5f55\u6bcf\u4e2a\u5355\u8bcd\u51fa\u73b0\u6b21\u6570\u7684\u6620\u5c04\u3002wc.Test \u51fd\u6570\u4f1a\u6267\u884c\u6d4b\u8bd5\u5957\u4ef6\uff0c\u68c0\u67e5\u4f20\u5165\u7684\u51fd\u6570\u662f\u5426\u6210\u529f\uff0c\u5e76\u5c06\u7ed3\u679c\u663e\u793a\u4e3a\u6210\u529f\u6216\u5931\u8d25\u3002&#8230;<br \/>\n\u95ee\u9898\u94fe\u63a5\uff1ahttps:\/\/go-tour-jp.appspot.com\/moretypes\/23<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"golang.org\/x\/tour\/wc\"<\/span>\r\n    <span class=\"s\">\"strings\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">WordCount<\/span><span class=\"p\">(<\/span><span class=\"n\">s<\/span> <span class=\"kt\">string<\/span><span class=\"p\">)<\/span> <span class=\"k\">map<\/span><span class=\"p\">[<\/span><span class=\"kt\">string<\/span><span class=\"p\">]<\/span><span class=\"kt\">int<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">m<\/span> <span class=\"o\">:=<\/span> <span class=\"nb\">make<\/span><span class=\"p\">(<\/span><span class=\"k\">map<\/span><span class=\"p\">[<\/span><span class=\"kt\">string<\/span><span class=\"p\">]<\/span><span class=\"kt\">int<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">_<\/span><span class=\"p\">,<\/span> <span class=\"n\">w<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"n\">strings<\/span><span class=\"o\">.<\/span><span class=\"n\">Fields<\/span><span class=\"p\">(<\/span><span class=\"n\">s<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">m<\/span><span class=\"p\">[<\/span><span class=\"n\">w<\/span><span class=\"p\">]<\/span><span class=\"o\">++<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">m<\/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\">wc<\/span><span class=\"o\">.<\/span><span class=\"n\">Test<\/span><span class=\"p\">(<\/span><span class=\"n\">WordCount<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<h1>\u7ec3\u4e60\uff1a\u6590\u6ce2\u90a3\u5951\u95ed\u5305<\/h1>\n<p>\u8ba9\u6211\u4eec\u5b9e\u73b0\u6590\u6ce2\u90a3\u5951\u51fd\u6570\u3002\u8be5\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u8fd4\u56de\u8fde\u7eed\u6590\u6ce2\u90a3\u5951\u6570\uff080\u30011\u30011\u30012\u30013\u30015\u3001&#8230;\uff09\u7684\u51fd\u6570\uff08\u95ed\u5305\uff09\u3002<br \/>\n\u95ee\u9898\u94fe\u63a5\uff1ahttps:\/\/go-tour-jp.appspot.com\/moretypes\/26<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"s\">\"fmt\"<\/span>\r\n\r\n<span class=\"c\">\/\/ fibonacci is a function that returns<\/span>\r\n<span class=\"c\">\/\/ a function that returns an int.<\/span>\r\n<span class=\"k\">func<\/span> <span class=\"n\">fibonacci<\/span><span class=\"p\">()<\/span> <span class=\"k\">func<\/span><span class=\"p\">()<\/span> <span class=\"kt\">int<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">a<\/span><span class=\"p\">,<\/span> <span class=\"n\">b<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">1<\/span><span class=\"p\">,<\/span> <span class=\"m\">0<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"k\">func<\/span><span class=\"p\">()<\/span> <span class=\"kt\">int<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">a<\/span><span class=\"p\">,<\/span> <span class=\"n\">b<\/span> <span class=\"o\">=<\/span> <span class=\"n\">b<\/span><span class=\"p\">,<\/span> <span class=\"n\">a<\/span><span class=\"o\">+<\/span><span class=\"n\">b<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">a<\/span>\r\n    <span class=\"p\">}<\/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\">f<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">fibonacci<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">i<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">0<\/span><span class=\"p\">;<\/span> <span class=\"n\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"m\">10<\/span><span class=\"p\">;<\/span> <span class=\"n\">i<\/span><span class=\"o\">++<\/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=\"n\">f<\/span><span class=\"p\">())<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<h1>\u7ec3\u4e60\uff1a\u7d27\u7ef3<\/h1>\n<p>\u8ba9\u6211\u4eec\u5b9e\u73b0\u4e00\u4e2aIPAddr\u7c7b\u578b\uff0c\u4ee5\u70b9\u5206\u56db\u6bb5\u7684\u5f62\u5f0f\u8f93\u51faIP\u5730\u5740\u3002\u8bf7\u5b9e\u73b0fmt.Stringer\u63a5\u53e3&#8230;<br \/>\n\u95ee\u9898\uff1ahttps:\/\/go-tour-jp.appspot.com\/methods\/18<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"s\">\"fmt\"<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">IPAddr<\/span> <span class=\"p\">[<\/span><span class=\"m\">4<\/span><span class=\"p\">]<\/span><span class=\"kt\">byte<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">ip<\/span> <span class=\"n\">IPAddr<\/span><span class=\"p\">)<\/span> <span class=\"n\">String<\/span><span class=\"p\">()<\/span> <span class=\"kt\">string<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Sprintf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%d.%d.%d.%d\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">ip<\/span><span class=\"p\">[<\/span><span class=\"m\">0<\/span><span class=\"p\">],<\/span> <span class=\"n\">ip<\/span><span class=\"p\">[<\/span><span class=\"m\">1<\/span><span class=\"p\">],<\/span> <span class=\"n\">ip<\/span><span class=\"p\">[<\/span><span class=\"m\">2<\/span><span class=\"p\">],<\/span> <span class=\"n\">ip<\/span><span class=\"p\">[<\/span><span class=\"m\">3<\/span><span class=\"p\">])<\/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\">hosts<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">map<\/span><span class=\"p\">[<\/span><span class=\"kt\">string<\/span><span class=\"p\">]<\/span><span class=\"n\">IPAddr<\/span><span class=\"p\">{<\/span>\r\n        <span class=\"s\">\"loopback\"<\/span><span class=\"o\">:<\/span>  <span class=\"p\">{<\/span><span class=\"m\">127<\/span><span class=\"p\">,<\/span> <span class=\"m\">0<\/span><span class=\"p\">,<\/span> <span class=\"m\">0<\/span><span class=\"p\">,<\/span> <span class=\"m\">1<\/span><span class=\"p\">},<\/span>\r\n        <span class=\"s\">\"googleDNS\"<\/span><span class=\"o\">:<\/span> <span class=\"p\">{<\/span><span class=\"m\">8<\/span><span class=\"p\">,<\/span> <span class=\"m\">8<\/span><span class=\"p\">,<\/span> <span class=\"m\">8<\/span><span class=\"p\">,<\/span> <span class=\"m\">8<\/span><span class=\"p\">},<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">name<\/span><span class=\"p\">,<\/span> <span class=\"n\">ip<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"n\">hosts<\/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: %v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">name<\/span><span class=\"p\">,<\/span> <span class=\"n\">ip<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<h1>Exercise: Mistakes<br \/>\n\u7ec3\u4e60\uff1a\u9519\u8bef<\/h1>\n<p>\u8bf7\u4ece\u4ee5\u524d\u7684\u7ec3\u4e60\u4e2d\u590d\u5236Sqrt\u51fd\u6570\uff0c\u5e76\u4fee\u590d\u5b83\u4ee5\u8fd4\u56de\u9519\u8bef\u503c\u3002&#8230;<br \/>\n\u95ee\u9898\u94fe\u63a5https:\/\/go-tour-jp.appspot.com\/methods\/20<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"fmt\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">ErrNegativeSqrt<\/span> <span class=\"kt\">float64<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">e<\/span> <span class=\"n\">ErrNegativeSqrt<\/span><span class=\"p\">)<\/span> <span class=\"n\">Error<\/span><span class=\"p\">()<\/span> <span class=\"kt\">string<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Sprintf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"cannot Sqrt negative number: %v\"<\/span><span class=\"p\">,<\/span> <span class=\"kt\">float64<\/span><span class=\"p\">(<\/span><span class=\"n\">e<\/span><span class=\"p\">))<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">Sqrt<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span> <span class=\"kt\">float64<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"kt\">float64<\/span><span class=\"p\">,<\/span> <span class=\"kt\">error<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">x<\/span> <span class=\"o\">&lt;<\/span> <span class=\"m\">0<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"m\">0<\/span><span class=\"p\">,<\/span> <span class=\"n\">ErrNegativeSqrt<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"n\">z<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">1.0<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">i<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">0<\/span><span class=\"p\">;<\/span> <span class=\"n\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"m\">10<\/span><span class=\"p\">;<\/span> <span class=\"n\">i<\/span><span class=\"o\">++<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">z<\/span> <span class=\"o\">-=<\/span> <span class=\"p\">(<\/span><span class=\"n\">z<\/span><span class=\"o\">*<\/span><span class=\"n\">z<\/span> <span class=\"o\">-<\/span> <span class=\"n\">x<\/span><span class=\"p\">)<\/span> <span class=\"o\">\/<\/span> <span class=\"p\">(<\/span><span class=\"m\">2<\/span> <span class=\"o\">*<\/span> <span class=\"n\">z<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">z<\/span><span class=\"p\">,<\/span> <span class=\"no\">nil<\/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\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"n\">Sqrt<\/span><span class=\"p\">(<\/span><span class=\"m\">2<\/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=\"n\">Sqrt<\/span><span class=\"p\">(<\/span><span class=\"o\">-<\/span><span class=\"m\">2<\/span><span class=\"p\">))<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<h1>\u953b\u70bc\uff1a\u8bfb\u8005\u4eec<\/h1>\n<p>\u8bf7\u5b9e\u73b0\u4e00\u4e2a Reader \u7c7b\u578b\uff0c\u7528\u4e8e\u8f93\u51fa\u65e0\u9650\u6d41\u7684 ASCII \u5b57\u7b26 &#8216;A&#8217;\u3002\u95ee\u9898\u94fe\u63a5\uff1ahttps:\/\/go-tour-jp.appspot.com\/methods\/22<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"s\">\"golang.org\/x\/tour\/reader\"<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">MyReader<\/span> <span class=\"k\">struct<\/span><span class=\"p\">{}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">r<\/span> <span class=\"n\">MyReader<\/span><span class=\"p\">)<\/span> <span class=\"n\">Read<\/span><span class=\"p\">(<\/span><span class=\"n\">b<\/span> <span class=\"p\">[]<\/span><span class=\"kt\">byte<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"kt\">int<\/span><span class=\"p\">,<\/span> <span class=\"kt\">error<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/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\">b<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">b<\/span><span class=\"p\">[<\/span><span class=\"n\">i<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"sc\">'A'<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nb\">len<\/span><span class=\"p\">(<\/span><span class=\"n\">b<\/span><span class=\"p\">),<\/span> <span class=\"no\">nil<\/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\">reader<\/span><span class=\"o\">.<\/span><span class=\"n\">Validate<\/span><span class=\"p\">(<\/span><span class=\"n\">MyReader<\/span><span class=\"p\">{})<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<h1>\u7ec3\u4e60\uff1arot13\u9605\u8bfb\u5668<\/h1>\n<p>\u8bf7\u5b9e\u73b0\u4e00\u4e2a rot13Reader\uff0c\u5b83\u5b9e\u73b0\u4e86 io.Reader \u63a5\u53e3\uff0c\u5e76\u5c06 ROT13 \u63db\u5b57\u5f0f\u6697\u53f7\uff08\u7f6e\u6362\u5bc6\u7801\uff09\u5e94\u7528\u4e8e\u6240\u6709\u5b57\u6bcd\u8fdb\u884c\u89e3\u5bc6\u3002\u4f60\u53ef\u4ee5\u5728\u6b64\u94fe\u63a5\u627e\u5230\u8be5\u95ee\u9898\u7684\u8be6\u7ec6\u8bf4\u660e\uff1ahttps:\/\/go-tour-jp.appspot.com\/methods\/23<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"io\"<\/span>\r\n    <span class=\"s\">\"os\"<\/span>\r\n    <span class=\"s\">\"strings\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">rot13Reader<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">r<\/span> <span class=\"n\">io<\/span><span class=\"o\">.<\/span><span class=\"n\">Reader<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">rot13<\/span> <span class=\"n\">rot13Reader<\/span><span class=\"p\">)<\/span> <span class=\"n\">Read<\/span><span class=\"p\">(<\/span><span class=\"n\">b<\/span> <span class=\"p\">[]<\/span><span class=\"kt\">byte<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"kt\">int<\/span><span class=\"p\">,<\/span> <span class=\"kt\">error<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">n<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">rot13<\/span><span class=\"o\">.<\/span><span class=\"n\">r<\/span><span class=\"o\">.<\/span><span class=\"n\">Read<\/span><span class=\"p\">(<\/span><span class=\"n\">b<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">i<\/span><span class=\"p\">,<\/span> <span class=\"n\">v<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"n\">b<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">switch<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">case<\/span> <span class=\"n\">v<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"sc\">'A'<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"n\">v<\/span> <span class=\"o\">&lt;<\/span> <span class=\"sc\">'N'<\/span><span class=\"p\">,<\/span> <span class=\"n\">v<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"sc\">'a'<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"n\">v<\/span> <span class=\"o\">&lt;<\/span> <span class=\"sc\">'n'<\/span><span class=\"o\">:<\/span>\r\n            <span class=\"n\">b<\/span><span class=\"p\">[<\/span><span class=\"n\">i<\/span><span class=\"p\">]<\/span> <span class=\"o\">+=<\/span> <span class=\"m\">13<\/span>\r\n        <span class=\"k\">case<\/span> <span class=\"n\">v<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"sc\">'N'<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"n\">v<\/span> <span class=\"o\">&lt;=<\/span> <span class=\"sc\">'Z'<\/span><span class=\"p\">,<\/span> <span class=\"n\">v<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"sc\">'n'<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"n\">v<\/span> <span class=\"o\">&lt;=<\/span> <span class=\"sc\">'z'<\/span><span class=\"o\">:<\/span>\r\n            <span class=\"n\">b<\/span><span class=\"p\">[<\/span><span class=\"n\">i<\/span><span class=\"p\">]<\/span> <span class=\"o\">-=<\/span> <span class=\"m\">13<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">n<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/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\">s<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">strings<\/span><span class=\"o\">.<\/span><span class=\"n\">NewReader<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Lbh penpxrq gur pbqr!\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">r<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">rot13Reader<\/span><span class=\"p\">{<\/span><span class=\"n\">s<\/span><span class=\"p\">}<\/span>\r\n    <span class=\"n\">io<\/span><span class=\"o\">.<\/span><span class=\"n\">Copy<\/span><span class=\"p\">(<\/span><span class=\"n\">os<\/span><span class=\"o\">.<\/span><span class=\"n\">Stdout<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">r<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<h1>\u5065\u8eab\uff1a\u56fe\u50cf<\/h1>\n<p>\u4f60\u8fd8\u8bb0\u5f97\u4e4b\u524d\u89e3\u51b3\u7684\u56fe\u50cf\u751f\u6210\u5668\u5417\uff1f\u8fd9\u6b21\uff0c\u6211\u4eec\u5c1d\u8bd5\u8fd4\u56de\u5b9e\u73b0\u4e86 image.Image \u63a5\u53e3\u800c\u4e0d\u662f\u6570\u636e\u5207\u7247\u7684\u56fe\u50cf\u3002&#8230;\u95ee\u9898\u94fe\u63a5\uff1ahttps:\/\/go-tour-jp.appspot.com\/methods\/25<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"golang.org\/x\/tour\/pic\"<\/span>\r\n    <span class=\"s\">\"image\"<\/span>\r\n    <span class=\"s\">\"image\/color\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">Image<\/span> <span class=\"k\">struct<\/span><span class=\"p\">{}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">i<\/span> <span class=\"n\">Image<\/span><span class=\"p\">)<\/span> <span class=\"n\">ColorModel<\/span><span class=\"p\">()<\/span> <span class=\"n\">color<\/span><span class=\"o\">.<\/span><span class=\"n\">Model<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">color<\/span><span class=\"o\">.<\/span><span class=\"n\">RGBAModel<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">i<\/span> <span class=\"n\">Image<\/span><span class=\"p\">)<\/span> <span class=\"n\">Bounds<\/span><span class=\"p\">()<\/span> <span class=\"n\">image<\/span><span class=\"o\">.<\/span><span class=\"n\">Rectangle<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">image<\/span><span class=\"o\">.<\/span><span class=\"n\">Rect<\/span><span class=\"p\">(<\/span><span class=\"m\">0<\/span><span class=\"p\">,<\/span> <span class=\"m\">0<\/span><span class=\"p\">,<\/span> <span class=\"m\">256<\/span><span class=\"p\">,<\/span> <span class=\"m\">256<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">i<\/span> <span class=\"n\">Image<\/span><span class=\"p\">)<\/span> <span class=\"n\">At<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"n\">color<\/span><span class=\"o\">.<\/span><span class=\"n\">Color<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">color<\/span><span class=\"o\">.<\/span><span class=\"n\">RGBA<\/span><span class=\"p\">{<\/span><span class=\"kt\">uint8<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"p\">),<\/span> <span class=\"kt\">uint8<\/span><span class=\"p\">(<\/span><span class=\"n\">y<\/span><span class=\"p\">),<\/span> <span class=\"m\">255<\/span><span class=\"p\">,<\/span> <span class=\"m\">255<\/span><span class=\"p\">}<\/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\">m<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">Image<\/span><span class=\"p\">{}<\/span>\r\n    <span class=\"n\">pic<\/span><span class=\"o\">.<\/span><span class=\"n\">ShowImage<\/span><span class=\"p\">(<\/span><span class=\"n\">m<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<h1>\u7ec3\u4e60\uff1a\u7b49\u4ef7\u7684\u4e8c\u53c9\u6811<\/h1>\n<p>\u5728\u8bb8\u591a\u8bed\u8a00\u4e2d\uff0c\u68c0\u67e5\u4e24\u4e2a\u4e8c\u53c9\u6811\u662f\u5426\u4fdd\u6301\u76f8\u540c\u7684\u987a\u5e8f\u662f\u76f8\u5f53\u590d\u6742\u7684\u3002\u4e3a\u4e86\u63cf\u8ff0\u4e00\u79cd\u7b80\u5355\u7684\u89e3\u51b3\u65b9\u6cd5\uff0c\u6211\u4eec\u5c06\u5229\u7528Go\u7684\u5e76\u53d1\u6027\u548c\u901a\u9053\u3002&#8230;<br \/>\n\u95ee\u9898\u94fe\u63a5\uff1ahttps:\/\/go-tour-jp.appspot.com\/concurrency\/7<br \/>\n\u7ee7\u7eed\u95ee\u9898\u94fe\u63a5\uff1ahttps:\/\/go-tour-jp.appspot.com\/concurrency\/8<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"fmt\"<\/span>\r\n    <span class=\"s\">\"golang.org\/x\/tour\/tree\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"c\">\/\/ Walk walks the tree t sending all values<\/span>\r\n<span class=\"c\">\/\/ from the tree to the channel ch.<\/span>\r\n<span class=\"k\">func<\/span> <span class=\"n\">Walk<\/span><span class=\"p\">(<\/span><span class=\"n\">t<\/span> <span class=\"o\">*<\/span><span class=\"n\">tree<\/span><span class=\"o\">.<\/span><span class=\"n\">Tree<\/span><span class=\"p\">,<\/span> <span class=\"n\">ch<\/span> <span class=\"k\">chan<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">walk<\/span><span class=\"p\">(<\/span><span class=\"n\">t<\/span><span class=\"p\">,<\/span> <span class=\"n\">ch<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"nb\">close<\/span><span class=\"p\">(<\/span><span class=\"n\">ch<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">walk<\/span><span class=\"p\">(<\/span><span class=\"n\">t<\/span> <span class=\"o\">*<\/span><span class=\"n\">tree<\/span><span class=\"o\">.<\/span><span class=\"n\">Tree<\/span><span class=\"p\">,<\/span> <span class=\"n\">ch<\/span> <span class=\"k\">chan<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">t<\/span> <span class=\"o\">==<\/span> <span class=\"no\">nil<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"n\">walk<\/span><span class=\"p\">(<\/span><span class=\"n\">t<\/span><span class=\"o\">.<\/span><span class=\"n\">Left<\/span><span class=\"p\">,<\/span> <span class=\"n\">ch<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">ch<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"n\">t<\/span><span class=\"o\">.<\/span><span class=\"n\">Value<\/span>\r\n    <span class=\"n\">walk<\/span><span class=\"p\">(<\/span><span class=\"n\">t<\/span><span class=\"o\">.<\/span><span class=\"n\">Right<\/span><span class=\"p\">,<\/span> <span class=\"n\">ch<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"c\">\/\/ Same determines whether the trees<\/span>\r\n<span class=\"c\">\/\/ t1 and t2 contain the same values.<\/span>\r\n<span class=\"k\">func<\/span> <span class=\"n\">Same<\/span><span class=\"p\">(<\/span><span class=\"n\">t1<\/span><span class=\"p\">,<\/span> <span class=\"n\">t2<\/span> <span class=\"o\">*<\/span><span class=\"n\">tree<\/span><span class=\"o\">.<\/span><span class=\"n\">Tree<\/span><span class=\"p\">)<\/span> <span class=\"kt\">bool<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">c1<\/span><span class=\"p\">,<\/span> <span class=\"n\">c2<\/span> <span class=\"o\">:=<\/span> <span class=\"nb\">make<\/span><span class=\"p\">(<\/span><span class=\"k\">chan<\/span> <span class=\"kt\">int<\/span><span class=\"p\">),<\/span> <span class=\"nb\">make<\/span><span class=\"p\">(<\/span><span class=\"k\">chan<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">go<\/span> <span class=\"n\">Walk<\/span><span class=\"p\">(<\/span><span class=\"n\">t1<\/span><span class=\"p\">,<\/span> <span class=\"n\">c1<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">go<\/span> <span class=\"n\">Walk<\/span><span class=\"p\">(<\/span><span class=\"n\">t2<\/span><span class=\"p\">,<\/span> <span class=\"n\">c2<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">v1<\/span><span class=\"p\">,<\/span> <span class=\"n\">ok1<\/span> <span class=\"o\">:=<\/span> <span class=\"o\">&lt;-<\/span><span class=\"n\">c1<\/span>\r\n        <span class=\"n\">v2<\/span><span class=\"p\">,<\/span> <span class=\"n\">ok2<\/span> <span class=\"o\">:=<\/span> <span class=\"o\">&lt;-<\/span><span class=\"n\">c2<\/span>\r\n        <span class=\"k\">switch<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">case<\/span> <span class=\"o\">!<\/span><span class=\"n\">ok1<\/span><span class=\"p\">,<\/span> <span class=\"o\">!<\/span><span class=\"n\">ok2<\/span><span class=\"o\">:<\/span>\r\n            <span class=\"k\">return<\/span> <span class=\"n\">ok1<\/span> <span class=\"o\">==<\/span> <span class=\"n\">ok2<\/span>\r\n        <span class=\"k\">case<\/span> <span class=\"n\">v1<\/span> <span class=\"o\">!=<\/span> <span class=\"n\">v2<\/span><span class=\"o\">:<\/span>\r\n            <span class=\"k\">return<\/span> <span class=\"no\">false<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/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\">ch<\/span> <span class=\"o\">:=<\/span> <span class=\"nb\">make<\/span><span class=\"p\">(<\/span><span class=\"k\">chan<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">go<\/span> <span class=\"n\">Walk<\/span><span class=\"p\">(<\/span><span class=\"n\">tree<\/span><span class=\"o\">.<\/span><span class=\"n\">New<\/span><span class=\"p\">(<\/span><span class=\"m\">1<\/span><span class=\"p\">),<\/span> <span class=\"n\">ch<\/span><span class=\"p\">)<\/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\">ch<\/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=\"n\">i<\/span><span class=\"p\">)<\/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\">Same<\/span><span class=\"p\">(<\/span><span class=\"n\">tree<\/span><span class=\"o\">.<\/span><span class=\"n\">New<\/span><span class=\"p\">(<\/span><span class=\"m\">1<\/span><span class=\"p\">),<\/span> <span class=\"n\">tree<\/span><span class=\"o\">.<\/span><span class=\"n\">New<\/span><span class=\"p\">(<\/span><span class=\"m\">1<\/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=\"n\">Same<\/span><span class=\"p\">(<\/span><span class=\"n\">tree<\/span><span class=\"o\">.<\/span><span class=\"n\">New<\/span><span class=\"p\">(<\/span><span class=\"m\">1<\/span><span class=\"p\">),<\/span> <span class=\"n\">tree<\/span><span class=\"o\">.<\/span><span class=\"n\">New<\/span><span class=\"p\">(<\/span><span class=\"m\">2<\/span><span class=\"p\">)))<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<h1>\u8fd0\u52a8\uff1a\u7f51\u7edc\u722c\u866b<\/h1>\n<p>\u5728\u8fd9\u4e2a\u7ec3\u4e60\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528Go\u8bed\u8a00\u7684\u5e76\u53d1\u7279\u6027\u6765\u5e76\u884c\u5316\u7f51\u7edc\u722c\u866b\uff08web crawler\uff09\u3002<br \/>\n\u95ee\u9898\u94fe\u63a5\uff1ahttps:\/\/go-tour-jp.appspot.com\/concurrency\/10<\/p>\n<p>\u5c3d\u7ba1\u672c\u6587\u4e2d\u672a\u63d0\u53casync.WaitGroup\uff0c\u4f46\u57fa\u4e8e\u4ee5\u4e0b\u539f\u56e0\uff0c\u6211\u4eec\u4f7f\u7528\u5b83\u3002<\/p>\n<p>Mutex\u3092\u4f7f\u3046\u306e\u3067\u3069\u3046\u305bsync\u30d1\u30c3\u30b1\u30fc\u30b8\u306f\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u3053\u3068\u306b\u306a\u308b<\/p>\n<p>channel\u3092\u4f7f\u3063\u3066\u9811\u5f35\u308b\u3088\u308a\u3082\u30b7\u30f3\u30d7\u30eb\u3067\u5206\u304b\u308a\u3084\u3059\u304f\u66f8\u3051\u308b<\/p>\n<p>WaitGroup\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306eExample\u304c\u3053\u306e\u554f\u984c\u3068\u540c\u3058\u3088\u3046\u306a\u8a2d\u5b9a<\/p>\n<p>\u6b64\u5916\uff0c\u7531\u4e8e\u8fd9\u4e2a\u8fc7\u7a0b\u4f1a\u5728\u4e00\u77ac\u95f4\u7ed3\u675f\uff0c\u56e0\u6b64\u5f88\u96be\u786e\u8ba4\u662f\u5426\u53ef\u4ee5\u540c\u65f6\u6267\u884c\u3002\u4e3a\u4e86\u66f4\u52a0\u6e05\u695a\u660e\u4e86\uff0c\u6211\u4eec\u53ef\u4ee5\u5bfc\u5165time\u5305\uff0c\u5e76\u5728Fetch\u65b9\u6cd5\u7684\u7b2c\u4e00\u884c\u52a0\u5165time.Sleep(1 * time.Second)\uff0c\u4ee5\u4fbf\u7b49\u5f851\u79d2\u949f\u3002\u5982\u679c\u4e00\u5207\u6b63\u786e\uff0c\u5e94\u8be5\u57283\u79d2\u949f\u5185\u7ed3\u675f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"fmt\"<\/span>\r\n    <span class=\"s\">\"sync\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">Fetcher<\/span> <span class=\"k\">interface<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ Fetch returns the body of URL and<\/span>\r\n    <span class=\"c\">\/\/ a slice of URLs found on that page.<\/span>\r\n    <span class=\"n\">Fetch<\/span><span class=\"p\">(<\/span><span class=\"n\">url<\/span> <span class=\"kt\">string<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">body<\/span> <span class=\"kt\">string<\/span><span class=\"p\">,<\/span> <span class=\"n\">urls<\/span> <span class=\"p\">[]<\/span><span class=\"kt\">string<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span> <span class=\"kt\">error<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"c\">\/\/ Crawl uses fetcher to recursively crawl<\/span>\r\n<span class=\"c\">\/\/ pages starting with url, to a maximum of depth.<\/span>\r\n<span class=\"k\">func<\/span> <span class=\"n\">Crawl<\/span><span class=\"p\">(<\/span><span class=\"n\">url<\/span> <span class=\"kt\">string<\/span><span class=\"p\">,<\/span> <span class=\"n\">depth<\/span> <span class=\"kt\">int<\/span><span class=\"p\">,<\/span> <span class=\"n\">fetcher<\/span> <span class=\"n\">Fetcher<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">cache<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">visited<\/span> <span class=\"k\">map<\/span><span class=\"p\">[<\/span><span class=\"kt\">string<\/span><span class=\"p\">]<\/span><span class=\"kt\">bool<\/span>\r\n        <span class=\"n\">sync<\/span><span class=\"o\">.<\/span><span class=\"n\">Mutex<\/span>\r\n    <span class=\"p\">}{<\/span>\r\n        <span class=\"n\">visited<\/span><span class=\"o\">:<\/span> <span class=\"nb\">make<\/span><span class=\"p\">(<\/span><span class=\"k\">map<\/span><span class=\"p\">[<\/span><span class=\"kt\">string<\/span><span class=\"p\">]<\/span><span class=\"kt\">bool<\/span><span class=\"p\">),<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">var<\/span> <span class=\"n\">wg<\/span> <span class=\"n\">sync<\/span><span class=\"o\">.<\/span><span class=\"n\">WaitGroup<\/span>\r\n    <span class=\"k\">var<\/span> <span class=\"n\">crawl<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"kt\">string<\/span><span class=\"p\">,<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">crawl<\/span> <span class=\"o\">=<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">url<\/span> <span class=\"kt\">string<\/span><span class=\"p\">,<\/span> <span class=\"n\">depth<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">depth<\/span> <span class=\"o\">&lt;=<\/span> <span class=\"m\">0<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">return<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"n\">cache<\/span><span class=\"o\">.<\/span><span class=\"n\">Lock<\/span><span class=\"p\">()<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">cache<\/span><span class=\"o\">.<\/span><span class=\"n\">visited<\/span><span class=\"p\">[<\/span><span class=\"n\">url<\/span><span class=\"p\">]<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"n\">cache<\/span><span class=\"o\">.<\/span><span class=\"n\">Unlock<\/span><span class=\"p\">()<\/span>\r\n            <span class=\"k\">return<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"n\">cache<\/span><span class=\"o\">.<\/span><span class=\"n\">visited<\/span><span class=\"p\">[<\/span><span class=\"n\">url<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"no\">true<\/span>\r\n        <span class=\"n\">cache<\/span><span class=\"o\">.<\/span><span class=\"n\">Unlock<\/span><span class=\"p\">()<\/span>\r\n        <span class=\"n\">body<\/span><span class=\"p\">,<\/span> <span class=\"n\">urls<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">fetcher<\/span><span class=\"o\">.<\/span><span class=\"n\">Fetch<\/span><span class=\"p\">(<\/span><span class=\"n\">url<\/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\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"n\">err<\/span><span class=\"p\">)<\/span>\r\n            <span class=\"k\">return<\/span>\r\n        <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\">\"found: %s %q<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">url<\/span><span class=\"p\">,<\/span> <span class=\"n\">body<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"n\">wg<\/span><span class=\"o\">.<\/span><span class=\"n\">Add<\/span><span class=\"p\">(<\/span><span class=\"nb\">len<\/span><span class=\"p\">(<\/span><span class=\"n\">urls<\/span><span class=\"p\">))<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"n\">_<\/span><span class=\"p\">,<\/span> <span class=\"n\">u<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"n\">urls<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">go<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">u<\/span> <span class=\"kt\">string<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n                <span class=\"n\">crawl<\/span><span class=\"p\">(<\/span><span class=\"n\">u<\/span><span class=\"p\">,<\/span> <span class=\"n\">depth<\/span><span class=\"o\">-<\/span><span class=\"m\">1<\/span><span class=\"p\">)<\/span>\r\n                <span class=\"n\">wg<\/span><span class=\"o\">.<\/span><span class=\"n\">Done<\/span><span class=\"p\">()<\/span>\r\n            <span class=\"p\">}(<\/span><span class=\"n\">u<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"n\">crawl<\/span><span class=\"p\">(<\/span><span class=\"n\">url<\/span><span class=\"p\">,<\/span> <span class=\"n\">depth<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">wg<\/span><span class=\"o\">.<\/span><span class=\"n\">Wait<\/span><span class=\"p\">()<\/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\">Crawl<\/span><span class=\"p\">(<\/span><span class=\"s\">\"https:\/\/golang.org\/\"<\/span><span class=\"p\">,<\/span> <span class=\"m\">4<\/span><span class=\"p\">,<\/span> <span class=\"n\">fetcher<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"c\">\/\/ fakeFetcher is Fetcher that returns canned results.<\/span>\r\n<span class=\"k\">type<\/span> <span class=\"n\">fakeFetcher<\/span> <span class=\"k\">map<\/span><span class=\"p\">[<\/span><span class=\"kt\">string<\/span><span class=\"p\">]<\/span><span class=\"o\">*<\/span><span class=\"n\">fakeResult<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">fakeResult<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">body<\/span> <span class=\"kt\">string<\/span>\r\n    <span class=\"n\">urls<\/span> <span class=\"p\">[]<\/span><span class=\"kt\">string<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">f<\/span> <span class=\"n\">fakeFetcher<\/span><span class=\"p\">)<\/span> <span class=\"n\">Fetch<\/span><span class=\"p\">(<\/span><span class=\"n\">url<\/span> <span class=\"kt\">string<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"kt\">string<\/span><span class=\"p\">,<\/span> <span class=\"p\">[]<\/span><span class=\"kt\">string<\/span><span class=\"p\">,<\/span> <span class=\"kt\">error<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">res<\/span><span class=\"p\">,<\/span> <span class=\"n\">ok<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">f<\/span><span class=\"p\">[<\/span><span class=\"n\">url<\/span><span class=\"p\">];<\/span> <span class=\"n\">ok<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">res<\/span><span class=\"o\">.<\/span><span class=\"n\">body<\/span><span class=\"p\">,<\/span> <span class=\"n\">res<\/span><span class=\"o\">.<\/span><span class=\"n\">urls<\/span><span class=\"p\">,<\/span> <span class=\"no\">nil<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"s\">\"\"<\/span><span class=\"p\">,<\/span> <span class=\"no\">nil<\/span><span class=\"p\">,<\/span> <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Errorf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"not found: %s\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">url<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"c\">\/\/ fetcher is a populated fakeFetcher.<\/span>\r\n<span class=\"k\">var<\/span> <span class=\"n\">fetcher<\/span> <span class=\"o\">=<\/span> <span class=\"n\">fakeFetcher<\/span><span class=\"p\">{<\/span>\r\n    <span class=\"s\">\"https:\/\/golang.org\/\"<\/span><span class=\"o\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">fakeResult<\/span><span class=\"p\">{<\/span>\r\n        <span class=\"s\">\"The Go Programming Language\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"p\">[]<\/span><span class=\"kt\">string<\/span><span class=\"p\">{<\/span>\r\n            <span class=\"s\">\"https:\/\/golang.org\/pkg\/\"<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"s\">\"https:\/\/golang.org\/cmd\/\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"p\">},<\/span>\r\n    <span class=\"p\">},<\/span>\r\n    <span class=\"s\">\"https:\/\/golang.org\/pkg\/\"<\/span><span class=\"o\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">fakeResult<\/span><span class=\"p\">{<\/span>\r\n        <span class=\"s\">\"Packages\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"p\">[]<\/span><span class=\"kt\">string<\/span><span class=\"p\">{<\/span>\r\n            <span class=\"s\">\"https:\/\/golang.org\/\"<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"s\">\"https:\/\/golang.org\/cmd\/\"<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"s\">\"https:\/\/golang.org\/pkg\/fmt\/\"<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"s\">\"https:\/\/golang.org\/pkg\/os\/\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"p\">},<\/span>\r\n    <span class=\"p\">},<\/span>\r\n    <span class=\"s\">\"https:\/\/golang.org\/pkg\/fmt\/\"<\/span><span class=\"o\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">fakeResult<\/span><span class=\"p\">{<\/span>\r\n        <span class=\"s\">\"Package fmt\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"p\">[]<\/span><span class=\"kt\">string<\/span><span class=\"p\">{<\/span>\r\n            <span class=\"s\">\"https:\/\/golang.org\/\"<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"s\">\"https:\/\/golang.org\/pkg\/\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"p\">},<\/span>\r\n    <span class=\"p\">},<\/span>\r\n    <span class=\"s\">\"https:\/\/golang.org\/pkg\/os\/\"<\/span><span class=\"o\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">fakeResult<\/span><span class=\"p\">{<\/span>\r\n        <span class=\"s\">\"Package os\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"p\">[]<\/span><span class=\"kt\">string<\/span><span class=\"p\">{<\/span>\r\n            <span class=\"s\">\"https:\/\/golang.org\/\"<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"s\">\"https:\/\/golang.org\/pkg\/\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"p\">},<\/span>\r\n    <span class=\"p\">},<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u6211\u8ba4\u4e3a\u300aGo\u4e4b\u65c5\u300b\u662f\u4e00\u672c\u5f88\u597d\u7684\u5165\u95e8\u6559\u6750\uff0c\u4f46\u662f\u5728\u7ec3\u4e60\u95ee\u9898\u4e2d\uff0c\u6709\u4e9b\u95ee\u9898\u521d\u6b21\u770b\u5230\u65f6\u611f\u5230\u5f88\u96be\u3002\u6709\u4e9b\u95ee\u9898\u5373\u4f7f\u67e5\u4e86\u4e5f [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44549","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 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Tour of Go\u7684\u7ec3\u4e60\u95ee\u9898\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/41e222757cdd2a3365361328bd79970a\",\"name\":\"\u79d1, \u96c5\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/1b2d3e00a7df03689797ebd4af8c5827ba5af936849a71050ec331f4cf902c5d?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/1b2d3e00a7df03689797ebd4af8c5827ba5af936849a71050ec331f4cf902c5d?s=96&d=mm&r=g\",\"caption\":\"\u79d1, 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