{"id":44652,"date":"2023-08-06T07:52:20","date_gmt":"2023-07-14T03:49:26","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/"},"modified":"2024-04-30T17:13:54","modified_gmt":"2024-04-30T09:13:54","slug":"%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/","title":{"rendered":"\u6211\u81ea\u5df1\u7684\u7b14\u8bb0\uff1a\u5b66\u4e60Golang-\u8ddf\u7740\u300aGo\u4e4b\u65c5\u300b\u8fdb\u884c"},"content":{"rendered":"<p>\u8fd9\u4e00\u5185\u5bb9\u4e3a2014\u5e747\u6708\u65f6\u7684\u8d44\u6599\u3002<\/p>\n<p>The code of &#8220;A Tour of Go&#8221; in the article belongs to The Go Authors and Google Inc. under this license.<\/p>\n<p>&#8220;A Tour of Go&#8221; \u8fd9\u7bc7\u6587\u7ae0\u4e2d\u7684\u4ee3\u7801\u5c5e\u4e8e The Go Authors \u548c Google Inc.\uff0c\u53d7\u6b64\u8bb8\u53ef\u8bc1\u4fdd\u62a4\u3002<\/p>\n<h1>\u53c2\u8003\u8d44\u6599<\/h1>\n<p>\u6982\u62ec\u6765\u770b<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Go \u30e1\u30e2 &#8211; \u65e5\u672c\u8a9e\u516c\u958b\u8a18\u4e8b &#8211; \u30b5\u30a4\u30dc\u30a6\u30ba\u30a8\u30f3\u30b8\u30cb\u30a2\u306eWIKI<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u4e2d\u56fd\u8a9e\u30aa\u30ea\u30b8\u30ca\u30eb\u306e\u65e5\u672c\u8a9e\u7248\u306e\u89e3\u8aac\u66f8: build-web-application-with-golang\/preface.md at master \u00b7 astaxie\/build-web-application-with-golang<\/ul>\n<p>\u5b98\u65b9\u7cfb<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5b9f\u8df5 Go: Effective Go &#8211; The Go Programming Language<\/ul>\n<\/li>\n<\/ul>\n<p>\u7ffb\u8a33\u7248 (golang.jp): \u5b9f\u8df5Go\u8a00\u8a9e &#8211; golang.jp<\/p>\n<p>\u4ed5\u69d8: The Go Programming Language Specification &#8211; The Go Programming Language<\/p>\n<p>\u7ffb\u8a33\u7248 (golang.jp): Go\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u4ed5\u69d8 &#8211; golang.jp<\/p>\n<p>\u30d1\u30c3\u30b1\u30fc\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9: Packages &#8211; The Go Programming Language<\/p>\n<p>\u8fdb\u4e00\u6b65<\/p>\n<p>Codelab: Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u66f8\u3044\u3066\u307f\u3088\u3046 &#8211; golang.jp \u5143\u306e\u30da\u30fc\u30b8\u306e\u65b9\u304c\u5185\u5bb9\u304c\u65b0\u3057\u3044\u611f\u3058\uff1f<\/p>\n<p>\u5143\u306e\u30da\u30fc\u30b8: Writing Web Applications &#8211; The Go Programming Language<\/p>\n<p>Go\u8a00\u8a9e\u306b\u3088\u308bweb\u30a2\u30d7\u30ea\u306e\u4f5c\u308a\u65b9<\/p>\n<p>Go \u30b3\u30fc\u30c9\u306e\u30ec\u30d3\u30e5\u30fc\u6642\u306b\u3088\u304f\u3055\u308c\u308b\u30b3\u30e1\u30f3\u30c8 &#8211; GRACEFULEXIT<\/p>\n<p>Ten Useful Techniques in Go &#8211; Fatih Arslan<\/p>\n<p>\u7ffb\u8a33\u7248 (kasato9700): golang &#8211; Go\u8a00\u8a9e\u3067\u5e78\u305b\u306b\u306a\u308c\u308b10\u306e\u30c6\u30af\u30cb\u30c3\u30af &#8211; Qiita<\/p>\n<h1>\u7b80\u8ff0\/\u6982\u62ec<\/h1>\n<p>A Tour of Go \u3092\u306a\u305e\u308b<\/p>\n<p>\u3042\u3068\u3067\u5206\u304b\u3063\u305f\u3051\u3069\u3001\u3053\u3053 \u306b\u3088\u308b\u3068\u3001\u4e0b\u8a18\u306e\u9806\u306e\u65b9\u304c\u826f\u304b\u3063\u305f\u3089\u3057\u3044 (\u3068\u308a\u3042\u3048\u305a \u9014\u4e2d\u304b\u3089 1 \u3092\u8aad\u3093\u3060)\u3002<\/p>\n<p>How to Write Go Code &#8211; The Go Programming Language<br \/>\nA Tour of Go<br \/>\nEffective Go &#8211; The Go Programming Language<\/p>\n<p>\u5199\u7d4c\u3059\u308b<br \/>\n\u3059\u3050\u5199\u7d4c\u3059\u308b\u3093\u3058\u3083\u306a\u304f\u3066\u3001<\/p>\n<p>\u5f53\u8a72\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u3063\u3066 (tour15.go \u307f\u305f\u3044\u306a\u540d\u524d\u3067)<br \/>\n\u53f3\u306e\u89e3\u8aac\u8aad\u3093\u3067\u304b\u3089<br \/>\n\u5de6\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u8aad\u3093\u3067<br \/>\n\u53f3\u306e\u89e3\u8aac\u8aad\u3093\u3067<br \/>\n\u5199\u7d4c\u3057\u3066<\/p>\n<p>go run tour15.go \u307f\u305f\u3044\u306b\u5b9f\u884c\u3057\u3066\u7d50\u679c\u898b\u308b<br \/>\n\u5206\u304b\u3089\u306a\u3044\u3068\u3053\u308d\u304c\u3042\u308c\u3070\u3001\u5f8c\u8ff0\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u3042\u308b\u306e\u3067\u3001\u98db\u3070\u3057\u3066\u9032\u3080<\/p>\n<p>\u4e0d\u8981\u8fc7\u4e8e\u60a0\u95f2\u5730\u505a\u4e8b\uff0c\u56e0\u4e3a\u4e0d\u96c6\u4e2d\u6ce8\u610f\u529b\u7684\u8bdd\u5c31\u8bb0\u4e0d\u4f4f\uff0c\u6240\u4ee5\u8981\u5c3d\u53ef\u80fd\u5730\u5148\u628a\u77e5\u8bc6\u585e\u6ee1\u3002<\/p>\n<p>\u56e0\u4e3a\u670972\u4e2a\uff0c\u6240\u4ee5\u6bcf\u5929\u540310\u4e2a\uff0c7\u5929\u80fd\u5403\u5b8c\u4e00\u8f6e\uff0c\u7136\u540e\u4f11\u606f1\u5929\uff0c\u518d\u590d\u4e603\u5929\uff0c\u518d\u4f11\u606f1\u5929\uff0c\u6700\u540e\u7528\u5269\u4e0b\u76842\u5929\u4f5c\u4e3a\u7f13\u51b2\u65f6\u95f4\uff0c\u8fd9\u6837\u611f\u89c9\u5982\u4f55\uff1f<\/p>\n<h1>\u65c5\u6e381-10<\/h1>\n<p>\u57fa\u672c\u5f62\u3002\u7b80\u5355\u7684\u5b57\u7b26\u4e32\u8f93\u51fa\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\">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=\"s\">\"Hello go!\"<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>package main, import, func main(){} \u3092\u3068\u308a\u3042\u3048\u305a\u30c6\u30f3\u30d7\u30ec\u3068\u3057\u3066\u899a\u3048\u308b<br \/>\n\u30b3\u30e1\u30f3\u30c8\u306f \/\/ \u307e\u305f\u306f \/* *\/<\/p>\n<p>import (&#8220;math\/rand&#8221;) \u2192 rand.Intn(10) \u30d1\u30b9\u306e\u6700\u5f8c\u304c\u30e2\u30b8\u30e5\u30fc\u30eb\u540d\u3068\u3057\u3066\u53d6\u308a\u8fbc\u307e\u308c\u308b<\/p>\n<p>math.pi \u3068 math.Pi \u306e\u9055\u3044 = \u5148\u982d\u304c\u5927\u6587\u5b57\u306f\u30e2\u30b8\u30e5\u30fc\u30eb\u5916\u90e8\u304b\u3089\u53c2\u7167\u53ef\u80fd<\/p>\n<p>\u51fa\u529b\u5bfe\u8c61\u6587\u5b57\u5217\u3092\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u3067\u306f\u306a\u304f\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u3059\u308b\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308b<\/p>\n<h1>\u51fd\u6570<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5f15\u6570: \u578b\u304c\u5909\u6570\u540d\u306e\u5f8c \u306b\u6765\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>\u623b\u308a\u5024\u306e\u578b \u3092 \u5f15\u6570\u306e\u30d1\u30ec\u30f3\u30b7\u30b9\u306e\u5f8c\u306b\u66f8\u304f<\/p>\n<p>\u5f15\u6570\u306e\u30ab\u30c3\u30b3\u3068\u95a2\u6570\u540d\u306e\u9593\u306b\u306f\u30b9\u30da\u30fc\u30b9\u3092\u7a7a\u3051\u306a\u3044<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">func<\/span> <span class=\"n\">add<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span> <span class=\"kt\">int<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"kt\">int<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">x<\/span> <span class=\"o\">+<\/span> <span class=\"n\">y<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5982\u679c\u6709\u4e24\u4e2a\u6216\u66f4\u591a\u51fd\u6570\u7684\u53c2\u6570\u5177\u6709\u76f8\u540c\u7684\u7c7b\u578b\uff0c\u5219\u53ef\u4ee5\u7701\u7565\u6700\u540e\u4e00\u4e2a\u7c7b\u578b\u3002<\/p>\n<p>\u4e0a\u8ff0\u7684\u51fd\u6570\u53ef\u4ee5\u4e0d\u5fc5\u6307\u5b9a\u53c2\u6570\u7c7b\u578b\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">func<\/span> <span class=\"n\">add<\/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=\"kt\">int<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">x<\/span> <span class=\"o\">+<\/span> <span class=\"n\">y<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u51fd\u6570\u53ef\u4ee5\u8fd4\u56de\u591a\u4e2a\u503c\u3002<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">func<\/span> <span class=\"n\">swap<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/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\">string<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">y<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4ee3\u5165\u306f := \u3068\u66f8\u304f\uff1f \u2192 \u4ee5\u540e\u518d\u8bf4\u3002<\/p>\n<ul class=\"post-ul\">\u623b\u308a\u5024\u306b\u306f\u540d\u524d\u3092\u4ed8\u3051\u3066\u8fd4\u3059\u3053\u3068\u304c\u51fa\u6765\u308b\u3002\u7701\u7565\u3082\u51fa\u6765\u308b\u3002\u3064\u307e\u308a return \u3060\u3051\u3002<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">func<\/span> <span class=\"n\">split<\/span><span class=\"p\">(<\/span><span class=\"n\">sum<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/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=\"p\">{<\/span>\r\n    <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"n\">sum<\/span> <span class=\"o\">-<\/span> <span class=\"m\">10<\/span>\r\n    <span class=\"n\">y<\/span> <span class=\"o\">=<\/span> <span class=\"n\">sum<\/span> <span class=\"o\">-<\/span> <span class=\"n\">x<\/span>\r\n    <span class=\"k\">return<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c&#8221;\u4ee3\u5165\u306f=&#8221;\u53ef\u4ee5\u5199\u6210&#8221;=&#8221;\u5417\uff1f\u5b83\u4eec\u7684\u533a\u522b\u662f\u4ec0\u4e48\uff1f\u8bf7\u5728\u7c7b\u578b\u548c\u53d8\u91cf\u58f0\u660e\u4e4b\u540e\u8fdb\u884c\u89e3\u91ca\u3002<\/p>\n<h1>\u65c5\u6e3811-20<\/h1>\n<p>\u662f\u56e0\u4e3a\u53ef\u8bfb\u6027\u548c\u6027\u80fd\u6539\u8fdb\u800c\u8fdb\u884c\u53d8\u91cf\u58f0\u660e\uff08\u7c7b\u4f3c\u4e8eC\u8bed\u8a00\u7684\u65b9\u5f0f\uff09<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">var<\/span> <span class=\"n\">i<\/span> <span class=\"kt\">int<\/span>\r\n<span class=\"k\">var<\/span> <span class=\"n\">c<\/span><span class=\"p\">,<\/span> <span class=\"n\">python<\/span><span class=\"p\">,<\/span> <span class=\"n\">java<\/span> <span class=\"kt\">bool<\/span> <span class=\"c\">\/\/ \u6700\u5f8c\u304c\u578b\u306e\u5ba3\u8a00\u306b\u306a\u308b<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u58f0\u660e\u53d8\u91cf\u7684\u540c\u65f6\u53ef\u4ee5\u8fdb\u884c\u521d\u59cb\u5316\u3002\u5982\u679c\u6307\u5b9a\u4e86\u521d\u59cb\u5316\u9879\uff0c\u5219\u53ef\u4ee5\u7701\u7565\u7c7b\u578b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">var<\/span> <span class=\"n\">i<\/span><span class=\"p\">,<\/span> <span class=\"n\">j<\/span> <span class=\"kt\">int<\/span> <span class=\"o\">=<\/span> <span class=\"m\">1<\/span><span class=\"p\">,<\/span> <span class=\"m\">2<\/span>\r\n<span class=\"k\">var<\/span> <span class=\"n\">c<\/span><span class=\"p\">,<\/span> <span class=\"n\">python<\/span><span class=\"p\">,<\/span> <span class=\"n\">java<\/span> <span class=\"o\">=<\/span> <span class=\"no\">true<\/span><span class=\"p\">,<\/span> <span class=\"no\">false<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"no!\"<\/span>\r\n<span class=\"c\">\/\/ fmt.Println(i, j, c, python, java) -&gt; 1 2 true false no!<\/span>\r\n<\/code><\/pre>\n<h2>:= \u5173\u4e8e<\/h2>\n<blockquote><p>\u77ed\u53d8\u91cf\u58f0\u660e<\/p>\n<p>\u5728\u51fd\u6570\u5185\u90e8\uff0c\u53ef\u4ee5\u4f7f\u7528 := \u8d4b\u503c\u8bed\u53e5\u8fdb\u884c\u9690\u5f0f\u7c7b\u578b\u58f0\u660e\u6765\u66ff\u4ee3 var \u58f0\u660e\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5728\u51fd\u6570\u5916\u90e8\u7684\u6240\u6709\u58f0\u660e\u90fd\u9700\u8981\u4f7f\u7528\u5173\u952e\u5b57\uff08\u5982 var\u3001func \u7b49\uff09\uff0c\u65e0\u6cd5\u4f7f\u7528 := \u8fdb\u884c\u9690\u5f0f\u58f0\u660e\u3002<\/p><\/blockquote>\n<p>k := 3 \u8fd9\u662f var k int = 3 \u7684\u7b80\u5199\u5f62\u5f0f\u5427\u3002<\/p>\n<p>\u6309\u7167\u4e0a\u8ff0\u5f15\u7528\u8bf4\u660e\uff0c\u51fd\u6570\u5916\u4e0d\u80fd\u4f7f\u7528\u7b80\u5199\u5f62\u5f0f\uff0c\u5fc5\u987b\u4f7f\u7528 var \u8fdb\u884c\u58f0\u660e\u3002<\/p>\n<h2>\u5d4c\u5165\u5f0f &#8211; \u5185\u7f6e\u7c7b\u578b<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">bool<\/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\">string<\/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\">int int8 int16 int32 int64,<\/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\">uint uint8 uint16 uint32 uint64 uintptr<\/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\">byte \/\/ uint8 \u306e\u5225\u540d<\/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\">rune \/\/ int32 \u306e\u5225\u540d, Unicode \u306e\u30b3\u30fc\u30c9\u30dd\u30a4\u30f3\u30c8\u3092\u8868\u3059<\/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\">float32 float64<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">complex64 complex128<\/ul>\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\">\"math\/cmplx\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">var<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"n\">ToBe<\/span> <span class=\"kt\">bool<\/span> <span class=\"o\">=<\/span> <span class=\"no\">false<\/span>\r\n    <span class=\"n\">MaxInt<\/span> <span class=\"kt\">uint64<\/span> <span class=\"o\">=<\/span> <span class=\"m\">1<\/span><span class=\"o\">&lt;&lt;<\/span><span class=\"m\">64<\/span> <span class=\"o\">-<\/span> <span class=\"m\">1<\/span>\r\n    <span class=\"n\">z<\/span> <span class=\"kt\">complex128<\/span> <span class=\"o\">=<\/span> <span class=\"n\">cmplx<\/span><span class=\"o\">.<\/span><span class=\"n\">Sqrt<\/span><span class=\"p\">(<\/span><span class=\"o\">-<\/span><span class=\"m\">5<\/span> <span class=\"o\">+<\/span> <span class=\"m\">12i<\/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=\"k\">const<\/span> <span class=\"n\">f<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"%T(%v)<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span>\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"n\">f<\/span><span class=\"p\">,<\/span> <span class=\"n\">ToBe<\/span><span class=\"p\">,<\/span> <span class=\"n\">ToBe<\/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=\"n\">f<\/span><span class=\"p\">,<\/span> <span class=\"n\">MaxInt<\/span><span class=\"p\">,<\/span> <span class=\"n\">MaxInt<\/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=\"n\">f<\/span><span class=\"p\">,<\/span> <span class=\"n\">z<\/span><span class=\"p\">,<\/span> <span class=\"n\">z<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u898b\u3066\u306e\u901a\u308a const \u306f\u5b9a\u6570\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>\u5ba3\u8a00\u306b := \u306f\u4f7f\u308f\u306a\u3044<br \/>\n\u95a2\u6570\u306e\u623b\u308a\u5024\u3092\u5229\u7528\u3059\u308b\u306a\u3069\u3057\u3066\u5b9a\u7fa9\u51fa\u6765\u306a\u3044 (\u6f14\u7b97\u7d50\u679c\u306f\u5927\u4e08\u592b)<br \/>\n\u5148\u982d\u6587\u5b57\u306e\u307f\u5927\u6587\u5b57\u304c\u6163\u7fd2\u306e\u6a21\u69d8<br \/>\n\u6570\u5024\u5b9a\u6570\u306f\u9ad8\u7cbe\u5ea6\u306a\u5024\u3067\u4fdd\u6301\u3055\u308c\u308b<br \/>\n\u578b\u6307\u5b9a\u306e\u306a\u3044\u5b9a\u6570\u306f\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u5fc5\u8981\u306a\u578b\u3092\u53d6\u308b<\/p>\n<p>var (\u4e00\u62ec) \u3067\u5909\u6570\u5ba3\u8a00\u51fa\u6765\u308b\u3093\u3060\u2026\u2026\u3002<br \/>\n\u305d\u3057\u3066 fmt.Printf() \u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067 %T \u306f\u578b\u3092\u3001 %v \u306f\u5024\u3092\u8868\u3059\u3063\u307d\u3044\u3002<\/p>\n<h2>\u5faa\u73af<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Go \u306b\u306f while \u304c\u306a\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>for \u3060\u3051\u3002<\/p>\n<pre class=\"post-pre\"><code>    <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\">sum<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">i<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u521d\u671f\u5316, \u6761\u4ef6, \u30eb\u30fc\u30d7\u6bce\u51e6\u7406\u3092\u56f2\u3080\u30ab\u30c3\u30b3\u306f\u4e0d\u8981 (C\u30e9\u30a4\u30af\u306a\u6587\u6cd5\u3068\u6bd4\u8f03\u3057\u3066)<\/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\">\u30bb\u30df\u30b3\u30ed\u30f3\u3067\u533a\u5207\u308b<\/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\">C\u30e9\u30a4\u30af\u306a\u6587\u6cd5\u3068\u540c\u3058\u304f\u305d\u308c\u305e\u308c\u7701\u7565\u306f\u53ef\u80fd<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u305d\u306e\u969b\u30bb\u30df\u30b3\u30ed\u30f3\u3082\u7701\u7565\u53ef\u80fd<\/ul>\n<pre class=\"post-pre\"><code>    <span class=\"k\">for<\/span> <span class=\"n\">sum<\/span> <span class=\"o\">&lt;<\/span> <span class=\"m\">1000<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">sum<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">sum<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u5728\u8a08\u7b97\u6a5f\u7a0b\u5f0f\u4e2d\u4e00\u7a2e\u7279\u5b9a\u7684\u60c5\u6cc1\uff0c\u5176\u4e2d\u6307\u4ee4\u6703\u7121\u9650\u6b21\u5730\u91cd\u8907\u57f7\u884c\u3002<\/h3>\n<p>\u4ece\u6761\u4ef6\u5757\u4e2d\u7701\u7565\u6761\u4ef6\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\">func<\/span> <span class=\"n\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"c\">\/\/ \u4f55\u304b\u3042\u308c\u3070\u8131\u51fa\u51e6\u7406<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5982\u679c\u8fd0\u884c tour20.go\uff0c\u5219\u4f7f\u7528 Ctrl+C \u7ec8\u6b62\u3002<\/p>\n<h1>\u603b\u7ed3: \u7b2c1 &#8211; 20\u6b21\u65c5\u884c<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u57fa\u672c\u306e\u5f62<\/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\">\u51fa\u529b<\/ul>\n<\/li>\n<\/ul>\n<p>fmt.Println(&#8220;string&#8221;, &#8220;next_str&#8221;)<br \/>\nfmt.Printf(&#8220;%T, %v&#8221;, val, val)<\/p>\n<p>\u5909\u6570, \u578b, \u5b9a\u6570<br \/>\n\u95a2\u6570 (\u5f15\u6570\u3068\u3001\u623b\u308a\u5024\u306e\u578b\u30fb\u540d\u524d)<br \/>\n\u30eb\u30fc\u30d7<\/p>\n<p>\u81ea\u5df1\u603b\u7ed3\u7684\u5f62\u5f0f\u5982\u4e0b\u2193 de \u2193)<\/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\">func<\/span> <span class=\"n\">to_negative<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"kt\">int<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">const<\/span> <span class=\"n\">Minus<\/span> <span class=\"kt\">int<\/span> <span class=\"o\">=<\/span> <span class=\"o\">-<\/span><span class=\"m\">1<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">Minus<\/span> <span class=\"o\">*<\/span> <span class=\"n\">x<\/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\">sum<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">1<\/span>\r\n\r\n    <span class=\"k\">for<\/span> <span class=\"n\">sum<\/span> <span class=\"o\">&lt;<\/span> <span class=\"m\">500<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">sum<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">sum<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"n\">to_negative<\/span><span class=\"p\">(<\/span><span class=\"n\">sum<\/span><span class=\"p\">))<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u95ee\uff1a\u547d\u540d\u7a7a\u95f4\u662f\u600e\u4e48\u56de\u4e8b\u5462\uff1f<\/p>\n<h1>\u65c5\u884c21\u81f341<\/h1>\n<p>\u5f53\u6211\u8d70\u8fdb\u623f\u95f4\uff0c\u6211\u610f\u8bc6\u5230\u5b83\u5df2\u7ecf\u88ab\u6d17\u52ab\u4e00\u7a7a\u3002<\/p>\n<ul class=\"post-ul\">\u6761\u4ef6\u30d6\u30ed\u30c3\u30af\u306b\u30ab\u30c3\u30b3\u304c\u306a\u3044<\/ul>\n<p>\u8fd9\u4e0e\u8fd9\u91cc\u65e0\u5173\uff0c\u4f46\u662f-x\u662f\u6307-x\u4e58\u4ee5-1\u5f62\u6210\u7684\u5417\uff01<\/p>\n<pre class=\"post-pre\"><code>    <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=\"n\">sqrt<\/span><span class=\"p\">(<\/span><span class=\"o\">-<\/span><span class=\"n\">x<\/span><span class=\"p\">)<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"i\"<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>for i := 10; i &lt; 100 {} \u307f\u305f\u3044\u306b\u3001\u6761\u4ef6\u306e\u524d\u306b\u77ed\u3044\u6587\u3092\u66f8\u3051\u308b<\/p>\n<p>\u305d\u306e\u77ed\u3044\u6587\u3067\u5ba3\u8a00\u3057\u305f\u5909\u6570\u306f\u305d\u306e if \u30b9\u30b3\u30fc\u30d7 (else \u542b\u3080) \u306e\u307f\u3067\u6709\u52b9<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"k\">if<\/span> <span class=\"n\">v<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">math<\/span><span class=\"o\">.<\/span><span class=\"n\">Pow<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">n<\/span><span class=\"p\">);<\/span> <span class=\"n\">v<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">lim<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">v<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u7528\u725b\u987f\u6cd5\u6765\u6c42\u89e3\u5e73\u65b9\u6839\u3002<\/h2>\n<p>\u6211\u4f9d\u636e\u300aGo\u8bed\u8a00\u7f16\u5199Go\u4ee3\u7801\u300b\u53c2\u8003\u4e86\u8fd9\u4e2a\u3002<\/p>\n<p>\u81ea\u5df1\u5c1a\u672a\u638c\u63e1\u597d\u7684\u90e8\u5206\u662f<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30ab\u30c3\u30b3\u3092\u4f7f\u3063\u305f\u8a08\u7b97\u512a\u5148\u5ea6\u4ed8<\/ul>\n<\/li>\n<\/ul>\n<p>z &#8211; (z*z &#8211; x) \/ 2 * z \u2190 \u9593\u9055\u3044<\/p>\n<p>z &#8211; (z*z &#8211; x) \/ (2 * z) \u6b63\u3057\u3044<\/p>\n<p>\u5bf9\u4e8e Sqrt() \u7684\u5b9e\u73b0\u5982\u4e0a\u6240\u793a\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/ Package newmath is a trivial example package.<\/span>\r\n<span class=\"k\">package<\/span> <span class=\"n\">newmath<\/span>\r\n\r\n<span class=\"c\">\/\/ Sqrt returns an approximation to the square root of x.<\/span>\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\">1000<\/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<\/code><\/pre>\n<blockquote><p>\u8bf7\u5c1d\u8bd5\u66f4\u6539\u5faa\u73af\uff0c\u4ee5\u4f7f\u5176\u5728z\u7684\u503c\u5728\u5faa\u73af\u5f00\u59cb\u4e4b\u524d\u4e0d\u518d\u6539\u53d8\uff08\u6216\u8005\u5dee\u5f02\u53d8\u5f97\u975e\u5e38\u5c0f\uff09\u65f6\u505c\u6b62\u3002<\/p><\/blockquote>\n<p>\u53ea\u9700\u8981\u4e00\u4e2a\u9009\u9879 \uff1a\u4e0e\u6b64\u76f8\u5e94\u7684\u7248\u672c\u662f<\/p>\n<p>\u8bf7\u95ee\u662f\u5426\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u539f\u751f\u7684\u4e2d\u6587\u7ffb\u8bd1\u5462\uff1f<\/p>\n<p>\u5982\u679c\u6211\u53ef\u4ee5\u4ee5&#8230;\u4f5c\u4e3a\u53c2\u8003\u7684\u8bdd\uff0c<\/p>\n<pre class=\"post-pre\"><code>\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\">last_z<\/span><span class=\"p\">,<\/span> <span class=\"n\">z<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"m\">1.0<\/span>\r\n\r\n    <span class=\"k\">for<\/span> <span class=\"n\">math<\/span><span class=\"o\">.<\/span><span class=\"n\">Abs<\/span><span class=\"p\">(<\/span><span class=\"n\">z<\/span><span class=\"o\">-<\/span><span class=\"n\">last_z<\/span><span class=\"p\">)<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"m\">1.0e-6<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">last_z<\/span><span class=\"p\">,<\/span> <span class=\"n\">z<\/span> <span class=\"o\">=<\/span> <span class=\"n\">z<\/span><span class=\"p\">,<\/span> <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\r\n    <span class=\"k\">return<\/span> <span class=\"n\">z<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u53d8\u5f97\u50cf\u8fd9\u6837\u3002\u539f\u6765\u5982\u6b64\u2026\u3002<\/p>\n<p>\u5faa\u73af.go &#8211; go-tour &#8211; Go\u7f16\u7a0b\u8bed\u8a00\u4e4b\u65c5 &#8211; \u8c37\u6b4c\u9879\u76ee\u6258\u7ba1<\/p>\n<p>\u5f53\u6211\u770b\u5230&#8230;<\/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\">\"math\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">const<\/span> <span class=\"n\">delta<\/span> <span class=\"o\">=<\/span> <span class=\"m\">1e-6<\/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=\"n\">x<\/span>\r\n        <span class=\"n\">n<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">0.0<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"n\">math<\/span><span class=\"o\">.<\/span><span class=\"n\">Abs<\/span><span class=\"p\">(<\/span><span class=\"n\">n<\/span><span class=\"o\">-<\/span><span class=\"n\">z<\/span><span class=\"p\">)<\/span> <span class=\"o\">&gt;<\/span> <span class=\"n\">delta<\/span> <span class=\"p\">{<\/span>\r\n                <span class=\"n\">n<\/span><span class=\"p\">,<\/span> <span class=\"n\">z<\/span> <span class=\"o\">=<\/span> <span class=\"n\">z<\/span><span class=\"p\">,<\/span> <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=\"k\">const<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"m\">2<\/span>\r\n        <span class=\"n\">mine<\/span><span class=\"p\">,<\/span> <span class=\"n\">theirs<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">Sqrt<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"p\">),<\/span> <span class=\"n\">math<\/span><span class=\"o\">.<\/span><span class=\"n\">Sqrt<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/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\">mine<\/span><span class=\"p\">,<\/span> <span class=\"n\">theirs<\/span><span class=\"p\">,<\/span> <span class=\"n\">mine<\/span><span class=\"o\">-<\/span><span class=\"n\">theirs<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u76ee\u524d\u62df\u5b9a\u7684\u8ba1\u5212\u3002<\/p>\n<h2>\u7d50\u69cb\u9ad4<\/h2>\n<p>\u4e0eC\u8bed\u8a00\u76f8\u4f3c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">Vertex<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">X<\/span> <span class=\"kt\">int<\/span>\r\n    <span class=\"n\">Y<\/span> <span class=\"kt\">int<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"c\">\/\/ \u3068\u3044\u3046\u66f8\u304d\u65b9\u3082\u51fa\u6765\u308b\u3057\u3001<\/span>\r\n<span class=\"c\">\/\/ \u6b21\u306e\u3088\u3046\u306a\u66f8\u304d\u65b9\u3082\u51fa\u6765\u308b<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">Vertex2<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">X<\/span><span class=\"p\">,<\/span> <span class=\"n\">Y<\/span> <span class=\"kt\">int<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">var<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"n\">p<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Vertex<\/span><span class=\"p\">{<\/span><span class=\"m\">1<\/span><span class=\"p\">,<\/span> <span class=\"m\">2<\/span><span class=\"p\">}<\/span>  <span class=\"c\">\/\/ has type Vertex<\/span>\r\n    <span class=\"n\">q<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Vertex<\/span><span class=\"p\">{<\/span><span class=\"m\">1<\/span><span class=\"p\">,<\/span> <span class=\"m\">2<\/span><span class=\"p\">}<\/span>  <span class=\"c\">\/\/ has type *Vertex<\/span>\r\n    <span class=\"n\">r<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Vertex<\/span><span class=\"p\">{<\/span><span class=\"n\">X<\/span><span class=\"o\">:<\/span> <span class=\"m\">1<\/span><span class=\"p\">}<\/span>  <span class=\"c\">\/\/ Y:0 is implicit<\/span>\r\n    <span class=\"n\">s<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Vertex<\/span><span class=\"p\">{}<\/span> <span class=\"c\">\/\/ X:0 and Y:0<\/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\">v<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">Vertex<\/span><span class=\"p\">{<\/span><span class=\"m\">1<\/span><span class=\"p\">,<\/span> <span class=\"m\">2<\/span><span class=\"p\">}<\/span>\r\n    <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">X<\/span> <span class=\"o\">=<\/span> <span class=\"m\">4<\/span>\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">X<\/span><span class=\"p\">)<\/span>\r\n\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"n\">p<\/span><span class=\"p\">,<\/span> <span class=\"n\">q<\/span><span class=\"p\">,<\/span> <span class=\"n\">r<\/span><span class=\"p\">,<\/span> <span class=\"n\">s<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5ba3\u8a00\u306f type \u540d\u524d struct {} \u3068\u3044\u3046\u611f\u3058\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>\u540d\u524d{\u30d5\u30a3\u30fc\u30eb\u30c91, \u30d5\u30a3\u30fc\u30eb\u30c92} \u3068\u3044\u3046\u611f\u3058\u3067\u5024\u3092\u5165\u308c\u308b\u3002<\/p>\n<h2>\u6307\u9488<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30dd\u30a4\u30f3\u30bf\u306f\u3042\u308b\u304c\u30dd\u30a4\u30f3\u30bf\u6f14\u7b97\u306f\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>q := &amp;p \u306e\u3088\u3046\u306b\u30a2\u30c9\u30ec\u30b9\u6f14\u7b97\u5b50\u3067\u30dd\u30a4\u30f3\u30bf\u3092\u5f97\u308b\u3053\u3068\u304c\u51fa\u6765\u308b<\/p>\n<p>q.X \u306e\u3088\u3046\u306b\u305d\u306e\u307e\u307e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u30a2\u30af\u30bb\u30b9\u51fa\u6765\u308b<\/p>\n<h2>\u65b0\u5efa()<\/h2>\n<p>\u7528 `var t *T = new(T)` \u6216\u8005 `t := new(T)` \u8fd9\u6837\u7684\u65b9\u5f0f\u8fdb\u884c\u96f6\u521d\u59cb\u5316\u5e76\u5206\u914d\u4e86\u4e00\u5757\u5185\u5b58\u7684\u6307\u9488\u6765\u8fd4\u56de\u53d8\u91cf\u3002\u5373\u8868\u793a<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">v<\/span> <span class=\"o\">:=<\/span> <span class=\"nb\">new<\/span><span class=\"p\">(<\/span><span class=\"n\">Vertex<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">\u307e\u305f\u306f<\/span>\r\n<\/code><\/pre>\n<p>\u8acb\u7528\u4e2d\u6587\u4f86\u7ffb\u8b6f\u4ee5\u4e0b\u53e5\u5b50\uff0c\u53ea\u9700\u8981\u4e00\u500b\u9078\u9805\uff1a<br \/>\n\u3068<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">var<\/span> <span class=\"n\">v<\/span> <span class=\"o\">*<\/span><span class=\"n\">Vertex<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">new<\/span><span class=\"p\">(<\/span><span class=\"n\">Vertex<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>Sorry, but I&#8217;m unable to generate a response in Chinese as I&#8217;m an English language model.<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">v<\/span> <span class=\"o\">:=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Vertex<\/span><span class=\"p\">{<\/span><span class=\"m\">0<\/span><span class=\"p\">,<\/span> <span class=\"m\">0<\/span><span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u662f\u4e0d\u662f\u4e00\u6837\u7684\u610f\u601d\uff1f<\/p>\n<p>\u4e0b\u9762\u662f\u76f8\u5e94\u7684\u4e2d\u6587\u8868\u8ff0\uff1a<\/p>\n<p>\u8fdb\u884c\u4e86\u8bd5\u9a8c\u540e\uff0c\u8f93\u51fa\u7ed3\u679c\u662f\u4e00\u6837\u7684\u3002<\/p>\n<h2>\u5207\u7247.<\/h2>\n<p>[]T \u306f\u3001 T \u578b\u306e\u8981\u7d20\u3092\u3082\u3064\u30b9\u30e9\u30a4\u30b9\u3067\u3042\u308b.<\/p>\n<p>\u4f8b: p := []int {1, 2, 3}<\/p>\n<p>p[i] \u3067\u4e2d\u8eab\u3092\u53c2\u7167\u51fa\u6765\u308b<\/p>\n<p>len(p) \u3067\u9577\u3055\u3092\u53d6\u5f97\u3067\u304d\u308b<\/p>\n<h3>\u5207\u7247\u7684\u5207\u7247<\/h3>\n<p>p[0:0], p[3:3] \u306f\u7a7a<\/p>\n<p>p[0:1] \u306f 0 \u756a\u76ee\u306e\u8981\u7d20\u3060\u3051\u306e\u914d\u5217\u306e\u30b3\u30d4\u30fc<\/p>\n<p>p[n:m] \u306f n \u304b\u3089 m-1 \u756a\u76ee\u307e\u3067\u306e\u518d\u30b9\u30e9\u30a4\u30b9\u3068\u306a\u308b (Python \u3068\u304b\u3068\u540c\u3058)<\/p>\n<p>p[:4] \u306f 0-3\u756a\u76ee\u306e\u518d\u30b9\u30e9\u30a4\u30b9 (\u30bc\u30ed\u304c\u7701\u7565\u51fa\u6765\u308b)<br \/>\n\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u6b63\u6570\u306e\u307f p[-1] \u306e\u3088\u3046\u306a\u6307\u5b9a\u306f\u51fa\u6765\u306a\u3044<br \/>\n\u30b9\u30e9\u30a4\u30b9\u306f \u9577\u3055(len) \u3068 \u5bb9\u91cf (cap) \u3092\u6301\u3063\u3066\u3044\u308b (\u5f8c\u8ff0)<\/p>\n<h3>\u4f7f\u7528 make() \u51fd\u6570\u8fdb\u884c\u5207\u7247\u751f\u6210<\/h3>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">a := make([]int, 1, 5)<\/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\">\u5bb9\u91cf \u306f\u305d\u306e\u914d\u5217\u3092\u62e1\u5927\u51fa\u6765\u308b\u6700\u5927\u5024 (\u305d\u308c\u4ee5\u4e0a append \u51fa\u6765\u306a\u3044)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u3068\u3053\u308d\u3067\u3001 a := make([]int, 2, 5) \u2192 a[2] = 10 \u2192 \u30a8\u30e9\u30fc\u306b\u306a\u308b\u3053\u3068\u306b\u6ce8\u610f<\/ul>\n<p>\u81f3\u4eca\u51fa\u73b0\u7684\u8f93\u51fa\u683c\u5f0f\u5b50<\/p>\n<p>%d: \u5341\u9032<\/p>\n<p>%v: \u305d\u306e\u307e\u307e\u306e\u5024 (\u914d\u5217\u3082\u51fa\u529b\u51fa\u6765\u308b) (value \u306e\u982d\u6587\u5b57\uff1f)<\/p>\n<p>%T: \u578b<\/p>\n<p>%s: \u6587\u5b57\u5217<\/p>\n<h3>\u7a7a\u7684\u5207\u7247<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u6bb5\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">var<\/span> <span class=\"n\">z<\/span> <span class=\"p\">[]<\/span><span class=\"kt\">int<\/span>\r\n<span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"n\">z<\/span><span class=\"p\">,<\/span> <span class=\"nb\">len<\/span><span class=\"p\">(<\/span><span class=\"n\">z<\/span><span class=\"p\">),<\/span> <span class=\"nb\">cap<\/span><span class=\"p\">(<\/span><span class=\"n\">z<\/span><span class=\"p\">))<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u65f6\u5019\uff0cz == nil \u662f\u6210\u7acb\u7684\u3002<br \/>\nz \u6ca1\u6709\u5185\u5bb9\uff0c\u957f\u5ea6\u548c\u5bb9\u91cf\u90fd\u4e3a0\u3002 \u2192 nil<\/p>\n<h1>\u8303\u56f4<\/h1>\n<p>\u904d\u5386\u5207\u7247(slice)\u548c\u6620\u5c04(map)\uff0c\u4e0b\u9762\u7684&#8217;i&#8217;\u8868\u793a\u7d22\u5f15\uff0c&#8217;v&#8217;\u8868\u793a\u5b58\u50a8\u7684\u503c\u3002<\/p>\n<pre class=\"post-pre\"><code>    <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=\"p\">[]<\/span><span class=\"kt\">int<\/span><span class=\"p\">{<\/span><span class=\"m\">1<\/span><span class=\"p\">,<\/span> <span class=\"m\">2<\/span><span class=\"p\">,<\/span> <span class=\"m\">3<\/span><span class=\"p\">,<\/span> <span class=\"m\">4<\/span><span class=\"p\">,<\/span> <span class=\"m\">5<\/span><span class=\"p\">}<\/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\">\"1 + %d = %d<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">i<\/span><span class=\"p\">,<\/span> <span class=\"n\">v<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span> \r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u4e0d\u5fc5\u6bcf\u6b21\u90fd\u6e96\u5099\u4e00\u500b\u540c\u6642\u5305\u542b\u7d22\u5f15\u548c\u503c\u7684\u8b8a\u91cf\uff0c\u53ef\u4ee5\u5c07 i \u6539\u70ba _ \u4e26\u5c07\u5176\u4e1f\u68c4\u3002<\/p>\n<p>\u5982\u679c\u53ea\u9700\u8981\u7d22\u5f15\uff0c\u8bf7\u63d0\u4f9b\u4ee5\u4e0b\u9009\u9879\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">for<\/span> <span class=\"n\">i<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"p\">[]<\/span><span class=\"kt\">int<\/span><span class=\"p\">{<\/span><span class=\"m\">1<\/span><span class=\"p\">,<\/span><span class=\"m\">5<\/span><span class=\"p\">,<\/span><span class=\"m\">10<\/span><span class=\"p\">,<\/span><span class=\"m\">15<\/span><span class=\"p\">}<\/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\">\"i ==%d<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">i<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u53ea\u6709\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\u624d\u80fd\u5f97\u5230\u7ed3\u679c\uff08\u6216\u8005\u8bf4\u6ca1\u6709\u7b2c\u4e8c\u4e2a\u53d8\u91cf\u5c31\u65e0\u6cd5\u5f97\u5230\u503c\uff09\u3002<\/p>\n<p>\u987a\u4fbf\u8bf4\u4e00\u4e0b\uff0c\u5728\u300aGo\u4e4b\u65c5\u300b\u7684\u91cd\u8981\u4f4d\u7f6e\u4e0a\u63d0\u51fa\u7684\u7ec3\u4e60\u9898\u7684\u7b54\u6848\u662f\u4ec0\u4e48\uff1f<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u9009\u9879\u7684\u4e2d\u6587\u539f\u751f\u91ca\u4e49\uff1a<br \/>\n\u5728\u8fd9\u4e2a\u7f51\u5740\uff08https:\/\/code.google.com\/p\/go-tour\/source\/browse\/solutions\/slices.go\uff09\u7684slices.go\u6587\u4ef6\u4e2d\u6709\u4e00\u4e2a\u4f8b\u5b50,\u5373tour36\u7684\u6a21\u5f0f\u3002<\/p>\n<p>\u5728\u4e0b\u5217\u4ee3\u7801\u4e2d (\u306b\u3042\u308b)\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\">\"code.google.com\/p\/go-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\">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\">dy<\/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\">p<\/span> <span class=\"p\">{<\/span>\r\n                <span class=\"n\">p<\/span><span class=\"p\">[<\/span><span class=\"n\">i<\/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=\"p\">}<\/span>\r\n\r\n        <span class=\"k\">for<\/span> <span class=\"n\">y<\/span><span class=\"p\">,<\/span> <span class=\"n\">row<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"n\">p<\/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\">row<\/span> <span class=\"p\">{<\/span>\r\n                        <span class=\"n\">row<\/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>\r\n                <span class=\"p\">}<\/span>\r\n        <span class=\"p\">}<\/span>\r\n\r\n        <span class=\"k\">return<\/span> <span class=\"n\">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\">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<\/code><\/pre>\n<h3>\u4e0a\u8ff0\u4ee3\u7801\u7684\u6ce8\u610f\u4e8b\u9879<\/h3>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>p := make([][]uint8, dy) \u53ea\u662f\u521b\u5efa\u4e86\u4e00\u4e2a\u5177\u6709 dy \u4e2a\u5143\u7d20\u7684\u5207\u7247\uff0c\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u4e2a\u5177\u6709 dy \u4e2a\u5143\u7d20\u7684\u5207\u7247\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u6211\u4eec\u9700\u8981\u7528 dy \u4e2a\u5143\u7d20\u7684\u5207\u7247\u6765\u521d\u59cb\u5316\u6bcf\u4e2a\u5143\u7d20\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u901a\u8fc7\u53cc\u91cd\u5faa\u73af\u8bbf\u95ee\u4e8c\u7ef4\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\uff0c\u5e76\u4e3a\u5176\u8d4b\u503c\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0crange \u8fd4\u56de\u7684\u503c\u662f int \u7c7b\u578b\uff0c\u9700\u8981\u901a\u8fc7 uint8() \u8f6c\u6362\u6765\u4f7f\u8fd4\u56de\u503c\u7c7b\u578b\u4e00\u81f4\u3002<\/p>\n<p>\u5728\u4e0a\u8ff0\u4f8b\u5b50\u4e2d\uff0c\u7ed8\u5236\u7684\u8868\u8fbe\u5f0f\u4e3a x * y\uff08\u5982 tour36 \u7684\u89e3\u91ca\u4e2d\u6240\u8ff0\uff0c\u4e5f\u53ef\u4ee5\u662f (x+y)\/2 \u6216 x^y\uff09<\/p>\n<h1>\u5730\u56fe<\/h1>\n<p>\u7c7b\u4f3c\u4e8e\u5173\u8054\u6570\u7ec4\u3001\u5b57\u5178\u90a3\u79cd\u4e1c\u897f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">Vertex<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">Lat<\/span><span class=\"p\">,<\/span> <span class=\"n\">Long<\/span> <span class=\"kt\">float64<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">var<\/span> <span class=\"n\">m<\/span> <span class=\"k\">map<\/span><span class=\"p\">[<\/span><span class=\"kt\">string<\/span><span class=\"p\">]<\/span><span class=\"n\">Vertex<\/span> <span class=\"c\">\/\/ \u5909\u6570\u306e\u5ba3\u8a00<\/span>\r\n\r\n<span class=\"c\">\/\/ \u307e\u305f\u306f\u30ea\u30c6\u30e9\u30eb\u3067\u2193<\/span>\r\n\r\n<span class=\"k\">var<\/span> <span class=\"n\">m2<\/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\">Vertex<\/span><span class=\"p\">{<\/span>\r\n    <span class=\"s\">\"key1\"<\/span><span class=\"o\">:<\/span> <span class=\"n\">Vertex<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"m\">10.00000<\/span><span class=\"p\">,<\/span> <span class=\"m\">5.00000<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"p\">},<\/span>\r\n    <span class=\"s\">\"key2\"<\/span><span class=\"o\">:<\/span> <span class=\"n\">Vertex<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"m\">2.00000<\/span><span class=\"p\">,<\/span> <span class=\"m\">4.00000<\/span><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\">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=\"n\">Vertex<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">m<\/span><span class=\"p\">[<\/span><span class=\"s\">\"Bell Labs\"<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Vertex<\/span><span class=\"p\">{<\/span>\r\n        <span class=\"m\">40.68433<\/span><span class=\"p\">,<\/span> <span class=\"o\">-<\/span><span class=\"m\">74.39967<\/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\">m<\/span><span class=\"p\">[<\/span><span class=\"s\">\"Bell Labs\"<\/span><span class=\"p\">])<\/span>\r\n\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"n\">m2<\/span><span class=\"p\">[<\/span><span class=\"s\">\"key1\"<\/span><span class=\"p\">])<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4e0a\u8a18 &#8220;key1&#8221;: Vertex \u306e Vertex \u306f\u7701\u7565\u51fa\u6765\u308b<\/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\">\u66f4\u65b0, \u633f\u5165: m[&#8220;keyname&#8221;] = elem<\/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\">\u53c2\u7167: elem = m[&#8220;keyname&#8221;]<\/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\">\u5024\u306e\u524a\u9664: delete(m, &#8220;keyname&#8221;)<\/ul>\n<\/li>\n<\/ul>\n<p>\u30ad\u30fc\u306e\u5b58\u5728\u78ba\u8a8d (2\u3064\u306e\u5024\u3092\u4f7f\u3046): elem, ok = m[key], ok \u306e\u5024\u304c bool \u3067\u8fd4\u308b\u3002\u306a\u304a\u3001\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u3001elem \u306f\u8a72\u5f53\u3059\u308b\u578b\u306e\u30bc\u30ed\u306b\u306a\u308b\u3002<\/p>\n<h2>\u4f7f\u7528string\u5305\u5c06\u5355\u8bcd\u4ee5\u7a7a\u683c\u5206\u9694\u5f00\u6765\u3002<\/h2>\n<p>\u5bfc\u5165 &#8220;strings&#8221; \u5305\uff0c\u7136\u540e\u3002<\/p>\n<pre class=\"post-pre\"><code>    <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\">f<\/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\">f<\/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<\/code><\/pre>\n<p>\u8fd9\u6837\u505a\u53ef\u4ee5\u83b7\u53d6\u5355\u8bcd\u7684\u9891\u7387\u3002<\/p>\n<hr \/>\n<p>\u987a\u4fbf\u95ee\u4e00\u4e0b\uff0c\u6709\u4e2a\u7591\u95ee\uff1a\u5982\u679c\u8981\u8868\u8fbe\u300c\u306e\u300d\u548c\u300c\u3084\u300d\u6216\u8005\u300c\u306f\u300d\uff0c\u5e94\u8be5\u5982\u4f55\u4f7f\u7528\u5462\uff1f<\/p>\n<p>Go\u8bed\u8a00\u89c4\u8303 &#8211; golang.jp<\/p>\n<p>\u5728\u641c\u7d22\u4e2d\u53d1\u73b0\u4e86\u3002\u7ed3\u679c\uff0c<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">and: &amp;&amp;<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">or : ||<\/ul>\n<p>C\u8bed\u8a00\u548c\u5b83\u662f\u4e00\u6837\u7684\u3002<\/p>\n<hr \/>\n<h1>\u65c5\u884c42-56<\/h1>\n<h2>\u51fd\u6570<\/h2>\n<p>\u51fd\u6570\u4e5f\u53ef\u4ee5\u8d4b\u503c\u7ed9\u53d8\u91cf\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"n\">hypot<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span> <span class=\"kt\">float64<\/span><span class=\"p\">)<\/span> <span class=\"kt\">float64<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">math<\/span><span class=\"o\">.<\/span><span class=\"n\">Sqrt<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"o\">*<\/span><span class=\"n\">x<\/span> <span class=\"o\">+<\/span> <span class=\"n\">y<\/span><span class=\"o\">*<\/span><span class=\"n\">y<\/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\">hypot<\/span><span class=\"p\">(<\/span><span class=\"m\">3<\/span><span class=\"p\">,<\/span> <span class=\"m\">4<\/span><span class=\"p\">))<\/span>\r\n<\/code><\/pre>\n<h2>\u95ed\u5305<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">func<\/span> <span class=\"n\">adder<\/span><span class=\"p\">()<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"kt\">int<\/span> <span class=\"p\">{<\/span> <span class=\"c\">\/\/ (A)<\/span>\r\n    <span class=\"n\">sum<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">0<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"kt\">int<\/span> <span class=\"p\">{<\/span> <span class=\"c\">\/\/ (B)<\/span>\r\n        <span class=\"n\">sum<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">x<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">sum<\/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\">pos<\/span><span class=\"p\">,<\/span> <span class=\"n\">neg<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">adder<\/span><span class=\"p\">(),<\/span> <span class=\"n\">adder<\/span><span class=\"p\">()<\/span> <span class=\"c\">\/\/ (C)<\/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>\r\n            <span class=\"n\">pos<\/span><span class=\"p\">(<\/span><span class=\"n\">i<\/span><span class=\"p\">),<\/span> <span class=\"c\">\/\/ (D)<\/span>\r\n            <span class=\"n\">neg<\/span><span class=\"p\">(<\/span><span class=\"o\">-<\/span><span class=\"m\">2<\/span><span class=\"o\">*<\/span><span class=\"n\">i<\/span><span class=\"p\">),<\/span> <span class=\"c\">\/\/ (D)<\/span>\r\n        <span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">(A): func(int) int \u306f\u623b\u308a\u5024\u306e &#8220;\u578b&#8221; \u306a\u306e\u3067\u5f15\u6570\u306e\u5909\u6570\u540d\u306f\u8981\u3089\u306a\u3044<\/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\">(B): \u3053\u3061\u3089\u3067\u306f\u5177\u4f53\u7684\u306a &#8220;\u95a2\u6570&#8221; \u306e\u5b9f\u4f53\u3092\u8fd4\u3057\u3066\u3044\u308b\u306e\u3067\u5f15\u6570\u306e\u5909\u6570\u540d\u304c\u3042\u308b<\/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\">(C): \u305d\u308c\u305e\u308c\u306e\u5909\u6570\u306b\u95a2\u6570\u304c\u30d0\u30a4\u30f3\u30c9\u3055\u308c\u305f\u3002 sum := 0 \u304c\u5b9f\u884c\u3055\u308c\u3001\u95a2\u6570\u81ea\u4f53\u304c\u5909\u6570\u306b\u6e21\u3055\u308c\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">(D): pos(i) \u306f\u65e2\u306b<\/ul>\n<pre class=\"post-pre\"><code>  <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"kt\">int<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"n\">sum<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">x<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"n\">sum<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u7531\u4e8e\u51fd\u6570\u4e0e\u4e4b\u524d\u76f8\u540c\uff0c\u56e0\u6b64 sum := 0 \u6ca1\u6709\u88ab\u91cd\u65b0\u5904\u7406\u3002<\/p>\n<h3>\u6590\u6ce2\u90a3\u5951\u6570\u5217\uff08\u7b2c44\u4e2a\u7ec3\u4e60\uff09<\/h3>\n<pre class=\"post-pre\"><code><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\">f<\/span><span class=\"p\">,<\/span> <span class=\"n\">g<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">0<\/span><span class=\"p\">,<\/span> <span class=\"m\">1<\/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\">f<\/span><span class=\"p\">,<\/span> <span class=\"n\">g<\/span> <span class=\"o\">=<\/span> <span class=\"n\">g<\/span><span class=\"p\">,<\/span> <span class=\"n\">f<\/span><span class=\"o\">+<\/span><span class=\"n\">g<\/span> <span class=\"c\">\/\/ \u524d\u306e\u5024\u3068\u65b0\u3057\u3044\u5024\u3092\u6271\u3046\u5b9a\u5f62<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">f<\/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=\"c\">\/\/ \u2191\u521d\u671f\u6761\u4ef6(a0 = 0, a1 = 1) \u3055\u3048\u6709\u308c\u3070\u5f15\u6570\u3092\u53d6\u305a\u306b\u6570\u5217\u304c\u751f\u6210\u51fa\u6765\u308b<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<h2>\u8f6c\u6362<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">case \u306e\u6700\u5f8c\u3067\u81ea\u52d5\u7684\u306b break \u3059\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">break \u3055\u305b\u305a\u306b\u8cab\u901a\u3055\u305b\u305f\u3044\u5834\u5408\u306f fallthrough \u3092 case \u306e\u6700\u5f8c\u306b\u8a18\u8ff0\u3059\u308b<\/ul>\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\">\"runtime\"<\/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\">Print<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Go runs on \"<\/span><span class=\"p\">)<\/span> <span class=\"c\">\/\/ (A)<\/span>\r\n    <span class=\"k\">switch<\/span> <span class=\"n\">os<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">runtime<\/span><span class=\"o\">.<\/span><span class=\"n\">GOOS<\/span><span class=\"p\">;<\/span> <span class=\"n\">os<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">case<\/span> <span class=\"s\">\"darwin\"<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"OS X.\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">case<\/span> <span class=\"s\">\"linux\"<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Linux.\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">default<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"c\">\/\/ freebsd, openbsd,<\/span>\r\n        <span class=\"c\">\/\/ plan9, windows...<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%s.\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">os<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">(A): fmt.Print() \u6539\u884c\u3092\u5165\u308c\u305a\u306b\u51fa\u529b\u3059\u308b\u547d\u4ee4<\/ul>\n<h3>\u65f6\u95f4\u5305\u7684\u6837\u672c<\/h3>\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\">\"time\"<\/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=\"s\">\"When's Saturday?\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">today<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Now<\/span><span class=\"p\">()<\/span><span class=\"o\">.<\/span><span class=\"n\">Weekday<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"k\">switch<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Saturday<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">case<\/span> <span class=\"n\">today<\/span> <span class=\"o\">+<\/span> <span class=\"m\">0<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Today.\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">case<\/span> <span class=\"n\">today<\/span> <span class=\"o\">+<\/span> <span class=\"m\">1<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Tomorrow.\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">case<\/span> <span class=\"n\">today<\/span> <span class=\"o\">+<\/span> <span class=\"m\">2<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"In two days.\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">default<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Too far away.\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%T, %v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Saturday<\/span><span class=\"p\">,<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Saturday<\/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\">\"%T, %v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">today<\/span><span class=\"p\">,<\/span> <span class=\"n\">today<\/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\">\"%T, %v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">today<\/span><span class=\"o\">+<\/span><span class=\"m\">1<\/span><span class=\"p\">,<\/span> <span class=\"n\">today<\/span><span class=\"o\">+<\/span><span class=\"m\">1<\/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\">\"%T, %v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Tuesday<\/span><span class=\"o\">+<\/span><span class=\"m\">2<\/span><span class=\"p\">,<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Tuesday<\/span><span class=\"o\">+<\/span><span class=\"m\">2<\/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\">\"%T, %v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Saturday<\/span><span class=\"o\">+<\/span><span class=\"m\">1<\/span><span class=\"p\">,<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Saturday<\/span><span class=\"o\">+<\/span><span class=\"m\">1<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>When's Saturday?\r\nTomorrow.\r\ntime.Weekday, Saturday\r\ntime.Weekday, Friday\r\ntime.Weekday, Saturday\r\ntime.Weekday, Thursday\r\ntime.Weekday, %!v(PANIC=runtime error: index out of range)\r\n<\/code><\/pre>\n<p>\u6211\u8ba4\u4e3a time.Sunday \u8868\u793a\u5176\u4e2d\u6ca1\u6709\u4efb\u4f55\u503c\uff08time.Weekday \u7684\u7b2c7\u4e2a\u4f4d\u7f6e\u662f\u7d22\u5f15\u8303\u56f4\u5916\u4e14\u672a\u5b9a\u4e49\u7684\u610f\u601d\uff09\u3002<\/p>\n<p>\u6ca1\u6709\u6761\u4ef6\u7684 switch \u8bed\u53e5\u53ef\u4ee5\u4f5c\u4e3a\u957f\u7684\u201cif-then-else\u201d\u8bed\u53e5\u7684\u66ff\u4ee3\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">func<\/span> <span class=\"n\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">t<\/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=\"k\">switch<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">case<\/span> <span class=\"n\">t<\/span><span class=\"o\">.<\/span><span class=\"n\">Hour<\/span><span class=\"p\">()<\/span> <span class=\"o\">&lt;<\/span> <span class=\"m\">12<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Good morning!\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">case<\/span> <span class=\"n\">t<\/span><span class=\"o\">.<\/span><span class=\"n\">Hour<\/span><span class=\"p\">()<\/span> <span class=\"o\">&lt;<\/span> <span class=\"m\">17<\/span><span class=\"o\">:<\/span> <span class=\"c\">\/\/ (A)<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Good afternoon!\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">default<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Good evening!\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">(A): 12\u6642\u672a\u6e80\u306a\u3089\u305d\u306e\u4e0a\u306e case t.Hour() &lt; 12 \u3067 break \u3057\u3066\u3044\u308b\u3053\u3068\u306b\u6ce8\u610f<\/ul>\n<h2>\u590d\u6570\u7684\u7acb\u65b9\u6839<\/h2>\n<p>\u5728Go\u8bed\u8a00\u4e2d\u5982\u4f55\u6c42\u4e00\u4e2a\u6570\u7684\u7acb\u65b9\u6839\uff1f- Stack Overflow<\/p>\n<p>\u90a3<\/p>\n<p>\u6211\u53c2\u8003\u4e86Tour24\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\">\"math\/cmplx\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n<span class=\"k\">const<\/span> <span class=\"n\">delta<\/span> <span class=\"o\">=<\/span> <span class=\"m\">1e-6<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">Cbrt<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span> <span class=\"kt\">complex128<\/span><span class=\"p\">)<\/span> <span class=\"kt\">complex128<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">z<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">x<\/span>\r\n    <span class=\"n\">n<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">0.0<\/span> <span class=\"o\">+<\/span> <span class=\"m\">0i<\/span>  <span class=\"c\">\/\/ Point!: \u8907\u7d20\u6570\u306e\u5ba3\u8a00\u306e\u4ed5\u65b9\u3002\u3053\u308c\u3067 complex128 \u306b\u306a\u308b<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">cmplx<\/span><span class=\"o\">.<\/span><span class=\"n\">Abs<\/span><span class=\"p\">(<\/span><span class=\"n\">n<\/span><span class=\"o\">-<\/span><span class=\"n\">z<\/span><span class=\"p\">)<\/span> <span class=\"o\">&gt;<\/span> <span class=\"n\">delta<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">n<\/span><span class=\"p\">,<\/span> <span class=\"n\">z<\/span> <span class=\"o\">=<\/span> <span class=\"n\">z<\/span><span class=\"p\">,<\/span> <span class=\"n\">z<\/span><span class=\"o\">-<\/span><span class=\"p\">(<\/span><span class=\"n\">cmplx<\/span><span class=\"o\">.<\/span><span class=\"n\">Pow<\/span><span class=\"p\">(<\/span><span class=\"n\">z<\/span><span class=\"p\">,<\/span> <span class=\"m\">3<\/span><span class=\"p\">)<\/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\">3<\/span><span class=\"o\">*<\/span><span class=\"n\">cmplx<\/span><span class=\"o\">.<\/span><span class=\"n\">Pow<\/span><span class=\"p\">(<\/span><span class=\"n\">z<\/span><span class=\"p\">,<\/span> <span class=\"m\">2<\/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=\"k\">const<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"m\">2<\/span>\r\n    <span class=\"n\">mine<\/span><span class=\"p\">,<\/span> <span class=\"n\">theirs<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">Cbrt<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"p\">),<\/span> <span class=\"n\">cmplx<\/span><span class=\"o\">.<\/span><span class=\"n\">Pow<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"m\">1.0<\/span><span class=\"o\">\/<\/span><span class=\"m\">3<\/span><span class=\"p\">)<\/span>  <span class=\"c\">\/\/ Point!: 1.0\/3 \u3067 3\u221a \u306b\u306a\u308b<\/span>\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"n\">mine<\/span><span class=\"p\">,<\/span> <span class=\"n\">theirs<\/span><span class=\"p\">,<\/span> <span class=\"n\">cmplx<\/span><span class=\"o\">.<\/span><span class=\"n\">Abs<\/span><span class=\"p\">(<\/span><span class=\"n\">mine<\/span><span class=\"o\">-<\/span><span class=\"n\">theirs<\/span><span class=\"p\">))<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u53d1\u6325\u80fd\u529b<\/p>\n<pre class=\"post-pre\"><code>(1.2599210498953948+0i) (1.259921049894873+0i) 5.218048215738236e-13\r\n<\/code><\/pre>\n<p>\u8907\u6578\u548c\u8907\u6578\u7684\u8ddd\u96e2\uff08\u7bc4\u6578\uff09\u662f\u7d14\u91cf\uff0c\u6240\u4ee5\u5b83\u4e0d\u6703\u6210\u70ba\u4e00\u500b\u8907\u6578\u3002<\/p>\n<h2>\u65b9\u6cd5\uff08tour50 &#8211; \uff09<\/h2>\n<p>\u5728C\uff03\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u7ed3\u6784\u4f53\uff08struct\uff09\u6765\u5b9a\u4e49\u65b9\u6cd5\uff0c\u800c\u4e0d\u662f\u4f7f\u7528\u7c7b\uff08class\uff09\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30e1\u30bd\u30c3\u30c9\u30ec\u30b7\u30fc\u30d0\u30fc: func \u3068 \u30e1\u30bd\u30c3\u30c9\u540d\u306e\u9593\u306b\u66f8\u304b\u308c\u308b\u3082\u306e\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>\u4e0b\u8a18\u306e (v *Vertex) \u304c\u30ec\u30b7\u30fc\u30d0 (\u3053\u308c\u306f * \u304c\u4ed8\u3044\u3066\u3044\u308b\u306e\u3067\u30dd\u30a4\u30f3\u30bf\u30ec\u30b7\u30fc\u30d0)\u3002 \u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3059\u308b\u5bfe\u8c61\u306e struct \u3084\u578b\u3092\u6307\u5b9a\u3059\u308b\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\">\"math\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">Vertex<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">X<\/span><span class=\"p\">,<\/span> <span class=\"n\">Y<\/span> <span class=\"kt\">float64<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">v<\/span> <span class=\"o\">*<\/span><span class=\"n\">Vertex<\/span><span class=\"p\">)<\/span> <span class=\"n\">Abs<\/span><span class=\"p\">()<\/span> <span class=\"kt\">float64<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">math<\/span><span class=\"o\">.<\/span><span class=\"n\">Sqrt<\/span><span class=\"p\">(<\/span><span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">X<\/span><span class=\"o\">*<\/span><span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">X<\/span> <span class=\"o\">+<\/span> <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">Y<\/span><span class=\"o\">*<\/span><span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">Y<\/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\">v<\/span> <span class=\"o\">:=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Vertex<\/span><span class=\"p\">{<\/span><span class=\"m\">3<\/span><span class=\"p\">,<\/span> <span class=\"m\">4<\/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\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">Abs<\/span><span class=\"p\">())<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u5de5\u4f5c<\/p>\n<pre class=\"post-pre\"><code>5\r\n<\/code><\/pre>\n<h3>\u5982\u679c\u5728\u7c7b\u4e2d\u5b9a\u4e49\u65b9\u6cd5<\/h3>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">MyFloat<\/span> <span class=\"kt\">float64<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">f<\/span> <span class=\"n\">MyFloat<\/span><span class=\"p\">)<\/span> <span class=\"n\">Abs<\/span><span class=\"p\">()<\/span> <span class=\"kt\">float64<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">f<\/span> <span class=\"o\">&lt;<\/span> <span class=\"m\">0<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"kt\">float64<\/span><span class=\"p\">(<\/span><span class=\"o\">-<\/span><span class=\"n\">f<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"kt\">float64<\/span><span class=\"p\">(<\/span><span class=\"n\">f<\/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\">f<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">MyFloat<\/span><span class=\"p\">(<\/span><span class=\"o\">-<\/span><span class=\"n\">math<\/span><span class=\"o\">.<\/span><span class=\"n\">Sqrt2<\/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=\"o\">.<\/span><span class=\"n\">Abs<\/span><span class=\"p\">())<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h4>\u8bf7\u63d0\u51fa\u95ee\u9898\u3002<\/h4>\n<p>(v *Vertex), (f MyFloat) \u306e * \u306e\u6709\u7121\u306e\u9055\u3044\u306f\u4f55\u304b<\/p>\n<p>\u5f8c\u3067\u51fa\u3066\u304f\u308b\u3002<\/p>\n<p>* \u306f\u5bfe\u8c61\u578b\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u578b\u3092\u8868\u3059\u3002\u3053\u308c\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u306e\u305d\u306e\u64cd\u4f5c\u306b\u304a\u3044\u3066\u3001<\/p>\n<p>\u30c7\u30fc\u30bf\u304c\u30b3\u30d4\u30fc\u3055\u308c\u306a\u3044 (\u30e1\u30e2\u30ea\u52b9\u7387)<br \/>\n\u5bfe\u8c61\u30c7\u30fc\u30bf\u3092\u76f4\u63a5\u5909\u66f4\u53ef\u80fd<\/p>\n<p>MyFloat \u3067 * \u304c\u3064\u3044\u3066\u306a\u3044\u306e\u306f\u3001\u5358\u7d14\u306a\u578b\u306f\u30dd\u30a4\u30f3\u30bf\u3092\u4ecb\u3055\u306a\u304f\u3066\u3082\u64cd\u4f5c\u51fa\u6765\u308b\u304b\u3089\uff1f (C \u8a00\u8a9e\u307f\u305f\u3044\u306a\u8a00\u8a9e\u7684\u306a\u4ed5\u69d8\uff1f)<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">v<\/span> <span class=\"o\">*<\/span><span class=\"n\">Vertex<\/span><span class=\"p\">)<\/span> <span class=\"n\">Scale<\/span><span class=\"p\">(<\/span><span class=\"n\">f<\/span> <span class=\"kt\">float64<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">X<\/span> <span class=\"o\">=<\/span> <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">X<\/span> <span class=\"o\">*<\/span> <span class=\"n\">f<\/span>\r\n    <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">Y<\/span> <span class=\"o\">=<\/span> <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">Y<\/span> <span class=\"o\">*<\/span> <span class=\"n\">f<\/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\">v<\/span> <span class=\"o\">:=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Vertex<\/span><span class=\"p\">{<\/span><span class=\"m\">3<\/span><span class=\"p\">,<\/span> <span class=\"m\">4<\/span><span class=\"p\">}<\/span>\r\n    <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">Scale<\/span><span class=\"p\">(<\/span><span class=\"m\">5<\/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\">v<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u201c\u8f93\u51fa\u7684\u7ed3\u679c\u662f\u201d<\/p>\n<pre class=\"post-pre\"><code>&amp;{15 20}\r\n<\/code><\/pre>\n<p>\u5728\u4e2d\u56fd\uff0c\u53ea\u9700\u8981\u4e00\u4e2a\u9009\u9879\u8fdb\u884c\u4ee5\u4e0b\u81ea\u7136\u7684\u8f6c\u8ff0\uff1a<br \/>\n\u8fd9\u91cc\u6ca1\u6709\u76f4\u8bd1\u7684\u7ffb\u8bd1\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">v<\/span> <span class=\"n\">Vertex<\/span><span class=\"p\">)<\/span> <span class=\"n\">Scale<\/span><span class=\"p\">(<\/span><span class=\"n\">f<\/span> <span class=\"kt\">float64<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">X<\/span> <span class=\"o\">=<\/span> <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">X<\/span> <span class=\"o\">*<\/span> <span class=\"n\">f<\/span>\r\n    <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">Y<\/span> <span class=\"o\">=<\/span> <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">Y<\/span> <span class=\"o\">*<\/span> <span class=\"n\">f<\/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\">v<\/span> <span class=\"o\">:=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Vertex<\/span><span class=\"p\">{<\/span><span class=\"m\">3<\/span><span class=\"p\">,<\/span> <span class=\"m\">4<\/span><span class=\"p\">}<\/span>\r\n    <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"n\">Scale<\/span><span class=\"p\">(<\/span><span class=\"m\">5<\/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\">v<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8f93\u51fa\u4e3a<\/p>\n<pre class=\"post-pre\"><code>&amp;{3 4}\r\n<\/code><\/pre>\n<p>\u5982\u679c\u4e0d\u4f7f\u7528\u6307\u9488\u63a5\u6536\u5668\uff0c\u5219\u5728\u65b9\u6cd5\u5185\u90e8\u5bf9\u503c\u7684\u526f\u672c\u8fdb\u884c\u66f4\u6539\uff0c\u4e0d\u5bf9\u539f\u59cb\u503c\u4ea7\u751f\u5f71\u54cd\u3002<\/p>\n<h2>\u754c\u9762<\/h2>\n<ul class=\"post-ul\">\u578b\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5 (\u5ba3\u8a00\u307f\u305f\u3044\u306a\u611f\u3058) \u3059\u308b\u3053\u3068\u3067\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3067\u304d\u308b<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">Abser<\/span> <span class=\"k\">interface<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">Abs<\/span><span class=\"p\">()<\/span> <span class=\"kt\">float64<\/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=\"k\">var<\/span> <span class=\"n\">a<\/span> <span class=\"n\">Abser<\/span>\r\n    <span class=\"n\">f<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">MyFloat<\/span><span class=\"p\">(<\/span><span class=\"o\">-<\/span><span class=\"n\">math<\/span><span class=\"o\">.<\/span><span class=\"n\">Sqrt2<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">i<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">1<\/span>\r\n    <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"n\">f<\/span>\r\n    <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"n\">i<\/span> <span class=\"c\">\/\/ \u5b9f\u9a13<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">MyFloat<\/span> <span class=\"kt\">float64<\/span> \r\n\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">f<\/span> <span class=\"n\">MyFloat<\/span><span class=\"p\">)<\/span> <span class=\"n\">Abs<\/span><span class=\"p\">()<\/span> <span class=\"kt\">float64<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"o\">...<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>a \u4ee5 Abser \u7c7b\u578b\u58f0\u660e<\/ol>\n<\/li>\n<\/ol>\n<p>f \u521d\u59cb\u4e3a MyFloat \u7c7b\u578b\u5316<\/p>\n<p>\u5728\u8fd9\u91cc\uff0cf \u62e5\u6709 Abs() \u65b9\u6cd5 \u2192 \u5177\u5907 Abser \u63a5\u53e3\uff0c\u6240\u4ee5\u53ef\u4ee5\u7528 Abser \u7c7b\u578b\u7684 a \u8fdb\u884c\u8d4b\u503c\u3002<\/p>\n<p>\u5728\u540e\u7eed\u7684\u4ee3\u7801\u884c\u4e2d\uff0c\u7531\u4e8e\u5c06\u4e00\u4e2a\u6ca1\u6709\u5b9a\u4e49 Abs() \u65b9\u6cd5\u7684 int \u7c7b\u578b\u8d4b\u503c\u7ed9 Abser \u7c7b\u578b\u7684 a\uff0c\u56e0\u6b64\u4f1a\u5bfc\u81f4\u4ee5\u4e0b\u9519\u8bef\u3002<\/p>\n<pre class=\"post-pre\"><code>.\/tour53.go:19: cannot use i (type int) as type Abser in assignment:\r\n    int does not implement Abser (missing Abs method)\r\n<\/code><\/pre>\n<p>\u53e6\u4e00\u4e2a\u5173\u4e8e\u63a5\u53e3\u7684\u4e8b\u9879\u3002<\/p>\n<ul class=\"post-ul\">\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3092\u660e\u793a\u7684\u306b\u5ba3\u8a00\u3059\u308b\u5fc5\u8981\u306f\u306a\u3044\u3002<\/ul>\n<p>\u5f15\u81ea http:\/\/go-tour-jp.appspot.com\/#54<\/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\">\"os\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">Writer<\/span> <span class=\"k\">interface<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">Write<\/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=\"n\">n<\/span> <span class=\"kt\">int<\/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=\"k\">func<\/span> <span class=\"n\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">var<\/span> <span class=\"n\">w<\/span> <span class=\"n\">Writer<\/span>\r\n\r\n    <span class=\"c\">\/\/ os.Stdout implements Writer<\/span>\r\n    <span class=\"n\">w<\/span> <span class=\"o\">=<\/span> <span class=\"n\">os<\/span><span class=\"o\">.<\/span><span class=\"n\">Stdout<\/span>\r\n\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Fprintf<\/span><span class=\"p\">(<\/span><span class=\"n\">w<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"hello, writer<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5f88\u62b1\u6b49\uff0c\u6211\u53ea\u80fd\u63d0\u4f9b\u82f1\u6587\u7684\u7ffb\u8bd1\u3002\u4e0d\u80fd\u63d0\u4f9b\u4e2d\u6587\u7684\u7ffb\u8bd1\u3002<\/p>\n<p>\u6362\u53e5\u8bdd\u8bf4\uff0c\u5982\u679c\u63a5\u53e3\u76f8\u5339\u914d\uff0c\u90a3\u4e48\u8d4b\u503c\u64cd\u4f5c\u662f\u88ab\u5141\u8bb8\u7684\u3002<\/p>\n<h2>\u9519\u8bef (w\u00f9)<\/h2>\n<p>\u8bf7\u4ecehttp:\/\/go-tour-jp.appspot.com\/#55\u501f\u7528\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\">\"time\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">MyError<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">When<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Time<\/span>\r\n    <span class=\"n\">What<\/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\">e<\/span> <span class=\"o\">*<\/span><span class=\"n\">MyError<\/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\">\"at %v, %s\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">e<\/span><span class=\"o\">.<\/span><span class=\"n\">When<\/span><span class=\"p\">,<\/span> <span class=\"n\">e<\/span><span class=\"o\">.<\/span><span class=\"n\">What<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">run<\/span><span class=\"p\">()<\/span> <span class=\"kt\">error<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">MyError<\/span><span class=\"p\">{<\/span>\r\n        <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Now<\/span><span class=\"p\">(),<\/span>\r\n        <span class=\"s\">\"it didn't work\"<\/span><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=\"k\">if<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">run<\/span><span class=\"p\">();<\/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=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u6e38\u89c856\u8fd0\u52a8\uff1a\u5173\u4e8e\u9519\u8bef<\/h3>\n<p>\u5bf9\u4e8eSqrt()\u51fd\u6570\uff0c\u5982\u679c\u53c2\u6570\u4e3a\u8d1f\u6570\uff0c\u5219\u8fd4\u56de\u9519\u8bef\u3002<\/p>\n<blockquote><p>\u5728 Error \u65b9\u6cd5\u4e2d\u8c03\u7528 fmt.Print(e) \u53ef\u80fd\u4f1a\u4f7f\u7a0b\u5e8f\u9677\u5165\u65e0\u9650\u5faa\u73af\u3002<\/p><\/blockquote>\n<p>\u5173\u4e8e\u8fd9\u4e2a\u95ee\u9898\uff0c\u300a\u300b<\/p>\n<blockquote><p>\u60a8\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 fmt.Print(float64(e)) \u5bf9 e \u8fdb\u884c\u8f6c\u6362\u6765\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\u53d1\u751f\u3002\u4e3a\u4ec0\u4e48\u5462\uff1f<\/p><\/blockquote>\n<p>\u6709\u4e00\u6bb5\u8bdd\uff0c\u5728\u524d\u4e00\u9875\u63d0\u5230\u7684\uff0c<\/p>\n<blockquote><p>\u5728 fmt \u5305\u4e2d\uff0c\u5404\u79cd\u663e\u793a\u7684\u4f8b\u7a0b\u4f1a\u5728\u9700\u8981\u663e\u793a\u9519\u8bef\u65f6\u81ea\u52a8\u8c03\u7528 Error \u65b9\u6cd5\u3002<\/p><\/blockquote>\n<p>\u6211\u8ba4\u4e3a\u4ee5\u4e0b\u662f\u4e00\u4e2a\u89e3\u7b54\u793a\u4f8b\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\">\"math\"<\/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=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Print<\/span><span class=\"p\">(<\/span><span class=\"n\">e<\/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: %g\"<\/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\">const<\/span> <span class=\"n\">delta<\/span> <span class=\"o\">=<\/span> <span class=\"m\">1e-10<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">Sqrt<\/span><span class=\"p\">(<\/span><span class=\"n\">f<\/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\">f<\/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\">f<\/span><span class=\"p\">)<\/span> <span class=\"c\">\/\/ (A)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"n\">z<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">f<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">n<\/span> <span class=\"o\">:=<\/span> <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\">f<\/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=\"k\">if<\/span> <span class=\"n\">math<\/span><span class=\"o\">.<\/span><span class=\"n\">Abs<\/span><span class=\"p\">(<\/span><span class=\"n\">n<\/span><span class=\"o\">-<\/span><span class=\"n\">z<\/span><span class=\"p\">)<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">delta<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">break<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"n\">z<\/span> <span class=\"o\">=<\/span> <span class=\"n\">n<\/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<\/code><\/pre>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5728(A)\u4e2d\uff0c\u53ea\u6709\u7b2c\u4e8c\u4e2a\u8fd4\u56de\u503c\u8fd4\u56de\u4e86\u4e00\u4e2a\u7c7b\u578b\u4e3aErrNegativeSqrt\u7684\u53d8\u91cf\uff0c\u5e76\u4e14\u5728\u4e4b\u540e\u5e76\u6ca1\u6709\u663e\u5f0f\u5730\u8c03\u7528Error()\u65b9\u6cd5\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>\u5728fmt\u5305\u7684Print\u7b49\u65b9\u6cd5\u4e2d\uff0c\u5982\u4e0a\u6240\u8ff0\uff0c\u5982\u679c\u5b58\u5728Error()\uff0c\u5219\u4f1a\u8c03\u7528\u5b83\uff0c\u6240\u4ee5\u901a\u8fc7\u5c06\u6ca1\u6709Error()\u7684float64\u7b49\u7c7b\u578b\u8f6c\u6362\uff0c\u53ef\u4ee5\u907f\u514d\u65e0\u9650\u5faa\u73af\uff0c\u6211\u8ba4\u4e3a\u8fd9\u5c31\u662f\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n<p>\u6211\u770b\u4e86\u4e00\u4e0b http:\/\/golang.org\/src\/pkg\/fmt\/print.go\uff0c\u4f46\u662f\u7acb\u523b\u6ca1\u627e\u5230\u76f8\u5173\u90e8\u5206&#8230;\u3002<\/p>\n<blockquote><p>L: 692 v.Error\uff08\uff09<br \/>\n\u6545\u969c\uff08\uff09<\/p><\/blockquote>\n<p>\u8fd9\u4e2a\u5730\u65b9\u662f\u4ec0\u4e48\u5730\u65b9\uff1f<\/p>\n<h1>57\u81f361\u53f7\u65c5\u6e38\u4e4b\u65c5<\/h1>\n<h2>\u7f51\u9875\u670d\u52a1\u5668<\/h2>\n<pre class=\"post-pre\"><code><span class=\"n\">http<\/span><span class=\"o\">.<\/span><span class=\"n\">ListenAndServe<\/span><span class=\"p\">(<\/span><span class=\"s\">\"localhost:4000\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">h<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u56e0\u4e3a\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\u8c03\u7528\u4e86 h.ServeHTTP()\uff0c\u6240\u4ee5\u5c06\u5904\u7406 type Hello struct{} \u4e2d\u5b9e\u73b0\u7684\u65b9\u6cd5\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u7ec3\u4e60\uff1aHTTP\u5904\u7406\u7a0b\u5e8f<\/p>\n<p>\u542c\u5230\u7684\u7b2c\u4e00\u4e2a\u56de\u7b54\uff08\u6709\u9519\u8bef\uff09<\/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\">\"net\/http\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">String<\/span> <span class=\"kt\">string<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">str<\/span> <span class=\"n\">String<\/span><span class=\"p\">)<\/span> <span class=\"n\">ServeHTTP<\/span><span class=\"p\">(<\/span><span class=\"n\">w<\/span> <span class=\"n\">http<\/span><span class=\"o\">.<\/span><span class=\"n\">ResponseWriter<\/span><span class=\"p\">,<\/span> <span class=\"n\">r<\/span> <span class=\"o\">*<\/span><span class=\"n\">http<\/span><span class=\"o\">.<\/span><span class=\"n\">Request<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Fprint<\/span><span class=\"p\">(<\/span><span class=\"n\">w<\/span><span class=\"p\">,<\/span> <span class=\"n\">str<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">Struct<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">Greeting<\/span> <span class=\"kt\">string<\/span>\r\n    <span class=\"n\">Punct<\/span>    <span class=\"kt\">string<\/span>\r\n    <span class=\"n\">Who<\/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\">str<\/span> <span class=\"o\">*<\/span><span class=\"n\">Struct<\/span><span class=\"p\">)<\/span> <span class=\"n\">ServeHTTP<\/span><span class=\"p\">(<\/span><span class=\"n\">w<\/span> <span class=\"n\">http<\/span><span class=\"o\">.<\/span><span class=\"n\">ResponseWriter<\/span><span class=\"p\">,<\/span> <span class=\"n\">r<\/span> <span class=\"o\">*<\/span><span class=\"n\">http<\/span><span class=\"o\">.<\/span><span class=\"n\">Request<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Fprint<\/span><span class=\"p\">(<\/span><span class=\"n\">w<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">str<\/span><span class=\"o\">.<\/span><span class=\"n\">Greeting<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">str<\/span><span class=\"o\">.<\/span><span class=\"n\">Punct<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">str<\/span><span class=\"o\">.<\/span><span class=\"n\">Who<\/span><span class=\"p\">)<\/span> <span class=\"c\">\/\/ (A)<\/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=\"c\">\/\/ (B)<\/span>\r\n    <span class=\"k\">var<\/span> <span class=\"n\">hstring<\/span> <span class=\"n\">String<\/span>\r\n    <span class=\"k\">var<\/span> <span class=\"n\">hstruct<\/span> <span class=\"o\">*<\/span><span class=\"n\">Struct<\/span>\r\n    <span class=\"n\">http<\/span><span class=\"o\">.<\/span><span class=\"n\">ListenAndServe<\/span><span class=\"p\">(<\/span><span class=\"s\">\"localhost:4000\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">hstring<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">http<\/span><span class=\"o\">.<\/span><span class=\"n\">ListenAndServe<\/span><span class=\"p\">(<\/span><span class=\"s\">\"localhost:4000\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">hstruct<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u9700\u8981\u4fee\u6539\u7684\u4ee3\u7801\u90e8\u5206<\/h3>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">(A): \u30ec\u30b7\u30fc\u30d0\u306b *Struct \u3068\u30dd\u30a4\u30f3\u30bf\u3092\u6307\u5b9a\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u69cb\u9020\u4f53\u5909\u6570\u3078\u306e\u30a2\u30af\u30bb\u30b9\u306b\u306f &amp; \u306f\u8981\u3089\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>fmt.Fprint(&#8230;) \u306f fmt.Fprintf(w, &#8220;%s%s %s&#8221;, str.Greeting, str.Punct, str.Who) \u3068\u66f8\u304d\u76f4\u305b\u308b<\/p>\n<p>(B): ListenAndServe(&#8220;localhost:4000&#8221;, foo) \u306f foo \u304c ServeHTTP() \u3092\u5099\u3048\u3066\u3044\u308c\u3070\u305d\u308c\u3092\u51e6\u7406\u3059\u308b\u3057\u3001<br \/>\n\u4e0b\u8a18\u306e\u3088\u3046\u306b foo \u306e\u90e8\u5206\u306b nil \u3092\u6307\u5b9a\u3057\u3066\u3044\u308c\u3070\u3001 http.Handle \u306e\u7b2c 2 \u5f15\u6570\u306b\u5099\u308f\u3063\u305f ServeHTTP() \u304c\u51e6\u7406\u3055\u308c\u308b<\/p>\n<p>http.Handle() \u306e\u7b2c 1 \u5f15\u6570\u306b\u306f\u51e6\u7406\u304c\u5b9f\u884c\u3055\u308c\u308b URL \u30d1\u30b9\u3092\u8a2d\u5b9a\u3059\u308b<\/p>\n<p>http.Handle(&#8220;\/string&#8221;, String(&#8220;I&#8217;m a frayed knot.&#8221;))<br \/>\nhttp.Handle(&#8220;\/struct&#8221;, &amp;Struct{&#8220;Hello&#8221;, &#8220;:&#8221;, &#8220;Gophers!&#8221;})<br \/>\nerr := http.ListenAndServe(&#8220;localhost:4000&#8221;, nil)<\/p>\n<p>\u4ee5\u4e0b\u662f\u89e3\u7b54\u7684\u793a\u4f8b\u3002<\/p>\n<p>http.go &#8211; go-tour &#8211; Go\u7f16\u7a0b\u8bed\u8a00\u4e4b\u65c5 &#8211; Google\u9879\u76ee\u6258\u7ba1<\/p>\n<h2>\u56fe\u7247<\/h2>\n<p>\u55ef&#8230;<\/p>\n<h2>ROT13 \u9605\u8bfb\u8005<\/h2>\n<p>\u55ef&#8230;<\/p>\n<h1>62-72\u65c5\u6e38<\/h1>\n<h2>\u5173\u4e8e\u5e76\u53d1\u5904\u7406 &#8211; Goroutines<\/h2>\n<p>\u53bb\u8ba8\u8bba\u4e00\u4e0b\u5173\u4e8e\u6587\u7684\u4e8b\u60c5\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">func<\/span> <span class=\"n\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">go<\/span> <span class=\"n\">say<\/span><span class=\"p\">(<\/span><span class=\"s\">\"world\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">say<\/span><span class=\"p\">(<\/span><span class=\"s\">\"hello\"<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<blockquote><p>f\u3001x\u3001y\u3001z\u7684\u8bc4\u4f30\u53d1\u751f\u5728\u5f53\u524d\u7684goroutine\u4e2d\uff0cf\u7684\u6267\u884c\u53d1\u751f\u5728\u65b0\u7684goroutine\u4e2d\u3002<\/p><\/blockquote>\n<p>\u6267\u884c\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>hello\r\nworld\r\nhello\r\nworld\r\nhello\r\nworld\r\nhello\r\nworld\r\nhello\r\n<\/code><\/pre>\n<blockquote><p>\u7531\u4e8egoroutine\u5728\u76f8\u540c\u7684\u5730\u5740\u7a7a\u95f4\u4e2d\u6267\u884c\uff0c\u56e0\u6b64\u5bf9\u5171\u4eab\u5185\u5b58\u7684\u8bbf\u95ee\u9700\u8981\u8fdb\u884c\u9002\u5f53\u7684\u540c\u6b65\u3002sync\u5305\u63d0\u4f9b\u4e86\u4e00\u79cd\u6709\u7528\u7684\u65b9\u6cd5\uff0c\u4f46\u7531\u4e8eGo\u8bed\u8a00\u4e2d\u8fd8\u6709\u5176\u4ed6\u65b9\u6cd5\uff0c\u6240\u4ee5\u5e76\u4e0d\u662f\u975e\u5e38\u5fc5\u8981\u3002<\/p><\/blockquote>\n<h2>\u9891\u9053<\/h2>\n<p>\u4e3a\u4e86\u5c06\u6570\u636e\u53d1\u9001\u5230\u90a3\u8fb9\u7684\u4e16\u754c\u3002<br \/>\n\u53d1\u9001\u7684\u6570\u636e\u53ef\u4ee5\u4ece\u90a3\u8fb9\u7684\u4e16\u754c\u4e2d\u53d6\u56de\u3002<br \/>\n\u53ef\u4ee5\u5b58\u50a8\u5728\u7f13\u51b2\u533a\u91cc\u3002<\/p>\n<pre class=\"post-pre\"><code><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<\/code><\/pre>\n<p>\u7528\u4e2d\u6587\u8fdb\u884c\u521b\u5efa\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">ch<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"n\">v<\/span>    <span class=\"c\">\/\/ v \u3092\u30c1\u30e3\u30cd\u30eb ch \u3078\u9001\u308b\u3002<\/span>\r\n<span class=\"n\">v<\/span> <span class=\"o\">:=<\/span> <span class=\"o\">&lt;-<\/span><span class=\"n\">ch<\/span>  <span class=\"c\">\/\/ ch \u304b\u3089\u53d7\u4fe1\u3057\u3001<\/span>\r\n           <span class=\"c\">\/\/ \u5909\u6570\u3092 v \u3078\u5272\u308a\u5f53\u3066\u308b\u3002<\/span>\r\n<\/code><\/pre>\n<p>\u56e0\u6b64\uff0c<\/p>\n<p>&lt;\u30c1\u30e3\u30f3\u30cd\u30eb&gt; &lt;- &lt;\u5909\u6570&gt; \u3067\u30c1\u30e3\u30f3\u30cd\u30eb\u306b\u30c7\u30fc\u30bf\u3092\u9001\u308b<\/p>\n<p>&lt;\u5909\u6570&gt; := &lt;- &lt;\u30c1\u30e3\u30f3\u30cd\u30eb&gt; \u3067\u30c1\u30e3\u30f3\u30cd\u30eb\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u308b<\/p>\n<p>\u7c7b\u4f3c\u4e8ehttp:\/\/go-tour-jp.appspot.com\/#64\uff0c<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">go<\/span> <span class=\"n\">sum<\/span><span class=\"p\">(<\/span><span class=\"n\">a<\/span><span class=\"p\">[<\/span><span class=\"o\">:<\/span><span class=\"nb\">len<\/span><span class=\"p\">(<\/span><span class=\"n\">a<\/span><span class=\"p\">)<\/span><span class=\"o\">\/<\/span><span class=\"m\">2<\/span><span class=\"p\">],<\/span> <span class=\"n\">c<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<blockquote><p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u53d1\u9001\u548c\u63a5\u6536\u5c06\u88ab\u963b\u585e\uff0c\u76f4\u5230\u5176\u4e2d\u4e00\u65b9\u51c6\u5907\u5c31\u7eea\u3002\u8fd9\u79cd\u65b9\u5f0f\u5141\u8bb8\u5728\u6ca1\u6709\u660e\u786e\u9501\u6216\u6761\u4ef6\u53d8\u91cf\u7684\u60c5\u51b5\u4e0b\u540c\u6b65goroutine\u3002<\/p><\/blockquote>\n<p>\u56e0\u6b64\uff0c\u5373\u4f7f\u76f4\u63a5\u5199\u4e86\u4ee3\u7801\u4e5f\u4e0d\u4f1a\u540c\u65f6\u6539\u53d8\u53d8\u91cf\u3002<\/p>\n<p>\u7528\u4f5c\u7f13\u51b2\u533a\u7684\u521d\u59cb\u5316<\/p>\n<pre class=\"post-pre\"><code><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> <span class=\"m\">100<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>100\u90e8\u5206\u4ee3\u8868\u7f13\u51b2\u533a\u7684\u957f\u5ea6\u3002<\/p>\n<blockquote><p>\u53ea\u6709\u5f53\u7f13\u51b2\u533a\u6ee1\u65f6\uff0c\u624d\u4f1a\u963b\u585e\u5411\u7f13\u51b2\u533a\u901a\u9053\u53d1\u9001\u6570\u636e\u3002\u5f53\u7f13\u51b2\u533a\u4e3a\u7a7a\u65f6\uff0c\u4f1a\u963b\u585e\u63a5\u6536\u6570\u636e\u3002<\/p><\/blockquote>\n<p>\u542c\u8bf4\u3002<\/p>\n<blockquote><p>\u6ce8\u610f\uff1a\u8bf7\u52a1\u5fc5\u53ea\u5173\u95ed\u53d1\u9001\u65b9\u7684\u901a\u9053\uff0c\u800c\u4e0d\u662f\u63a5\u6536\u65b9\u3002\u5982\u679c\u5411\u5df2\u5173\u95ed\u7684\u901a\u9053\u53d1\u9001\u6570\u636e\uff0c\u5c06\u4f1a\u5bfc\u81f4\u6050\u614c\uff08panic\uff09\u3002<\/p>\n<p>\u53e6\u5916\u8bf7\u6ce8\u610f\uff1a\u901a\u9053\u4e0e\u6587\u4ef6\u4e0d\u540c\uff0c\u901a\u5e38\u4e0d\u9700\u8981\u5173\u95ed\u3002\u53ea\u6709\u5f53\u63a5\u6536\u65b9\u9700\u8981\u901a\u77e5\u53d1\u9001\u65b9\u4e0d\u4f1a\u518d\u6709\u66f4\u591a\u7684\u503c\u65f6\uff0c\u624d\u9700\u8981\u5173\u95ed\u901a\u9053\u3002\u4f8b\u5982\uff0c\u5728range\u5faa\u73af\u7ed3\u675f\u65f6\u3002<\/p><\/blockquote>\n<pre class=\"post-pre\"><code><span class=\"n\">v<\/span><span class=\"p\">,<\/span> <span class=\"n\">ok<\/span> <span class=\"o\">:=<\/span> <span class=\"o\">&lt;-<\/span><span class=\"n\">ch<\/span>\r\n<\/code><\/pre>\n<p>\u5199\u4e0b\u6765\u5e76\u4e14\u901a\u8fc7\u68c0\u67e5\u201cOK\u201d\u6765\u786e\u5b9a\u8be5\u901a\u9053\u7684\u6570\u636e\u5df2\u7ecf\u8017\u5c3d\u6216\u5173\u95ed\u3002<\/p>\n<p>\u660e\u786e\u7684\u6e20\u9053\u5173\u95ed\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nb\">close<\/span><span class=\"p\">(<\/span><span class=\"n\">ch<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u8fdb\u884c\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\">fibonacci<\/span><span class=\"p\">(<\/span><span class=\"n\">n<\/span> <span class=\"kt\">int<\/span><span class=\"p\">,<\/span> <span class=\"n\">c<\/span> <span class=\"k\">chan<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">0<\/span><span class=\"p\">,<\/span> <span class=\"m\">1<\/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=\"n\">n<\/span><span class=\"p\">;<\/span> <span class=\"n\">i<\/span><span class=\"o\">++<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">c<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"n\">x<\/span>        <span class=\"c\">\/\/ x \u304c n \u56de\u30d0\u30c3\u30d5\u30a1\u3068\u3057\u3066\u306e\u30c1\u30e3\u30f3\u30cd\u30eb\u306b\u653e\u308a\u8fbc\u307e\u308c\u308b<\/span>\r\n        <span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span> <span class=\"o\">=<\/span> <span class=\"n\">y<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"o\">+<\/span><span class=\"n\">y<\/span> <span class=\"c\">\/\/ x \u304c \u4e00\u3064\u524d\u306e x+y \u306b\u66f4\u65b0\u3055\u308c\u308b<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nb\">close<\/span><span class=\"p\">(<\/span><span class=\"n\">c<\/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\">c<\/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=\"m\">12<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">go<\/span> <span class=\"n\">fibonacci<\/span><span class=\"p\">(<\/span><span class=\"nb\">cap<\/span><span class=\"p\">(<\/span><span class=\"n\">c<\/span><span class=\"p\">),<\/span> <span class=\"n\">c<\/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\">c<\/span> <span class=\"p\">{<\/span> <span class=\"c\">\/\/ \u30d0\u30c3\u30d5\u30a1\u306b\u5165\u3063\u3066\u3044\u308b\u6570\u3060\u3051\u30d7\u30ea\u30f3\u30c8\u3055\u308c\u308b<\/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=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u9009\u62e9<\/h2>\n<blockquote><p>select\u8bed\u53e5\u5728\u591a\u4e2a\u901a\u4fe1\u64cd\u4f5c\u4e2d\u7b49\u5f85goroutine\u3002<\/p>\n<p>select\u4f1a\u5728case\u7684\u6761\u4ef6\u6ee1\u8db3\u4e4b\u524d\u4e00\u76f4\u963b\u585e\uff0c\u5e76\u4e14\u6267\u884c\u6ee1\u8db3\u6761\u4ef6\u7684case\u3002\u5982\u679c\u6709\u591a\u4e2acase\u6ee1\u8db3\u6761\u4ef6\uff0c\u4f1a\u968f\u673a\u9009\u62e9\u4e00\u4e2a\u6267\u884c\u3002<\/p><\/blockquote>\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\">func<\/span> <span class=\"n\">fibonacci<\/span><span class=\"p\">(<\/span><span class=\"n\">c<\/span><span class=\"p\">,<\/span> <span class=\"n\">quit<\/span> <span class=\"k\">chan<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">0<\/span><span class=\"p\">,<\/span> <span class=\"m\">1<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"p\">{<\/span>  <span class=\"c\">\/\/ (C)<\/span>\r\n        <span class=\"k\">select<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">case<\/span> <span class=\"n\">c<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"n\">x<\/span><span class=\"o\">:<\/span>\r\n            <span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span> <span class=\"o\">=<\/span> <span class=\"n\">y<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"o\">+<\/span><span class=\"n\">y<\/span>\r\n        <span class=\"k\">case<\/span> <span class=\"o\">&lt;-<\/span><span class=\"n\">quit<\/span><span class=\"o\">:<\/span>\r\n            <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"quit\"<\/span><span class=\"p\">)<\/span>\r\n            <span class=\"k\">return<\/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\">c<\/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=\"n\">quit<\/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=\"k\">func<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>  <span class=\"c\">\/\/ (A)<\/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=\"o\">&lt;-<\/span><span class=\"n\">c<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"n\">quit<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"m\">0<\/span>\r\n    <span class=\"p\">}()<\/span>\r\n    <span class=\"n\">fibonacci<\/span><span class=\"p\">(<\/span><span class=\"n\">c<\/span><span class=\"p\">,<\/span> <span class=\"n\">quit<\/span><span class=\"p\">)<\/span>  <span class=\"c\">\/\/ (B)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6267\u884c\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>0\r\n1\r\n1\r\n2\r\n3\r\n5\r\n8\r\n13\r\n21\r\n34\r\nquit\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">(A): \u672c\u6765\u3067\u3042\u308c\u3070 c \u30c1\u30e3\u30f3\u30cd\u30eb\u304b\u3089\u30c7\u30fc\u30bf\u3092 10 \u56de\u53d7\u4fe1\u3057\u3066\u3001 quit \u30c1\u30e3\u30f3\u30cd\u30eb\u306b 0 \u3092\u9001\u3063\u3066\u7d42\u308f\u308b<\/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\">(C): \u7121\u9650\u30eb\u30fc\u30d7\u5185\u3067\u3001 case \u306e\u3044\u305a\u308c\u304b\u3001\u3064\u307e\u308a c &lt;- x \u304b &lt;-quit \u304c<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5b9f\u884c\u3067\u304d\u308b\u307e\u3067 select \u3067\u30d6\u30ed\u30c3\u30af\u3059\u308b\u3002\u5b9f\u884c\u53ef\u80fd\u306b\u6163\u308c\u3070\u305d\u306e case \u5185\u3092\u5b9f\u884c\u3059\u308b\u3002<\/ul>\n<p>\u4ee5\u4e0b\u662f\u6211\u7684\u7406\u89e3\u8bb0\u5f55\u3002\u6211\u4e0d\u592a\u6709\u4fe1\u5fc3\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>(A)\u7531\u4e8e\u5b58\u5728channel\uff0c\u4e0d\u4f1a\u88ab\u963b\u585e\uff08\u4e0d\u4f1a\u7b49\u5f85\u540e\u7eed\u547d\u4ee4\uff09\uff0c\u4f1a\u5728\u5f53\u524d\u5904\u7406\u7ebf\u7a0b\u4e4b\u5916\u4ee5\u53e6\u4e00\u4e2agoroutine\u6267\u884c\uff0c\u6240\u4ee5(B)\u4e5f\u4f1a\u7acb\u5373\u5e76\u884c\u6267\u884c\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5728(A)\u4e2d\uff0c\u7531\u4e8ec\u4ecd\u4e3a\u7a7a\uff0c\u6240\u4ee5\u5728 fmt.Println(&lt;-c) \u7684\u5904\u7406\u8fc7\u7a0b\u4e2d\u4f1a\u8fdb\u5165\u963b\u585e\u72b6\u6001\uff08\u7b49\u5f85\u6570\u636e\u63a5\u6536\u53ef\u7528\uff09\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u4e0e(A)\u5e76\u884c\u6267\u884c\u7684(C)\u4e2d\uff0c\u5224\u65ad\u51fa case c &lt;-x \u53ef\u4ee5\u6267\u884c\uff0c<\/ol>\n<\/li>\n<\/ol>\n<p>\u5c06\u6570\u636ex (=0) \u53d1\u9001\u5230c channel\u3002<\/p>\n<p>c channel\u89e3\u9664\u963b\u585e\uff0c\u6267\u884c(A)\u7684 fmt.Println(&lt;-c)\uff0c\u8f93\u51fa0\u3002<br \/>\n(A)\u4e2d\u7684 for &#8230; i++ {} \u7684 i \u589e\u52a0\u4e861\u3002<br \/>\n\u7136\u540e\uff0c\u6267\u884c(C)\u4e2d\u7684 x, y = y, x+y\u3002<br \/>\n\u5728(C)\u4e2d\uff0c\u7531\u4e8e for{} \u5bfc\u81f4\u65e0\u9650\u5faa\u73af\uff0c\u6240\u4ee5\u518d\u6b21\u6267\u884c case c &lt;-x\u3002<br \/>\n\u540e\u7eed\u7684 x, y = y, x+y \u88ab\u5904\u7406\u3002<\/p>\n<p>\u7531\u4e8ec channel\u518d\u6b21\u6709\u6570\u636e\u8f93\u5165\uff0c\u6240\u4ee5(A)\u7684 fmt.Println(&lt;-c) \u88ab\u5904\u7406\u3002<br \/>\n\u91cd\u590d\u6267\u884c<\/p>\n<p>\u5f53i\u53d8\u4e3a10\u65f6\uff0c\u5c060\u53d1\u9001\u5230quit\uff0c<\/p>\n<p>(C)\u4e2d\u7684 case &lt;-quit \u88ab\u5904\u7406\uff0cfibonacci()\u672c\u8eab\u8fd4\u56de\u5e76\u7ed3\u675f\u3002<\/p>\n<p>\u8fd9\u4e2a\u5730\u65b9\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u6bd4\u5982\u8bf4\uff0c<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">func<\/span> <span class=\"n\">fibonacci<\/span><span class=\"p\">(<\/span><span class=\"n\">c<\/span><span class=\"p\">,<\/span> <span class=\"n\">quit<\/span> <span class=\"k\">chan<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">0<\/span><span class=\"p\">,<\/span> <span class=\"m\">1<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"p\">{<\/span>  <span class=\"c\">\/\/ (C)<\/span>\r\n        <span class=\"k\">select<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">case<\/span> <span class=\"n\">c<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"n\">x<\/span><span class=\"o\">:<\/span>\r\n            <span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span> <span class=\"o\">=<\/span> <span class=\"n\">y<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"o\">+<\/span><span class=\"n\">y<\/span>\r\n            <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"----point----\"<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"k\">case<\/span> <span class=\"o\">&lt;-<\/span><span class=\"n\">quit<\/span><span class=\"o\">:<\/span>\r\n            <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"quit\"<\/span><span class=\"p\">)<\/span>\r\n            <span class=\"k\">return<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6839\u636e\u7ed3\u679c\u663e\u793a\uff0c<\/p>\n<pre class=\"post-pre\"><code>0\r\n----point----\r\n----point----\r\n1\r\n1\r\n----point----\r\n----point----\r\n2\r\n3\r\n----point----\r\n----point----\r\n5\r\n8\r\n----point----\r\n----point----\r\n13\r\n21\r\n----point----\r\n----point----\r\n34\r\nquit\r\n<\/code><\/pre>\n<p>\u4e3a\u4ec0\u4e48\u4e4b\u524d\u7684\uff08C\uff09\u6a21\u5757\u8fde\u7eed\u8f93\u51fa\u4e24\u6b21\uff1f<\/p>\n<p>\u6211\u8ba4\u4e3a\u53ef\u80fd\u662f\u56e0\u4e3a\u4f7f\u7528\u4e86(C)\u8bed\u53e5\u4e2d\u7684select\u5bfc\u81f4\u4e86(A)\u7684goroutine\u88ab\u963b\u585e\u3002<\/p>\n<blockquote><p>\u6839\u636e\u5176 case \u7684\u6761\u4ef6\uff0cselect \u4f1a\u4e00\u76f4\u963b\u585e\u76f4\u5230\u53ef\u4ee5\u6267\u884c\u5176\u4e2d\u4e00\u4e2a\uff0c\u7136\u540e\u6267\u884c\u5339\u914d\u7684 case\u3002<\/p><\/blockquote>\n<p>\u987a\u5e8f\u6027\u7684\u8fc7\u7a0b\u662f&#8230;\u4e0d\u77e5\u9053&#8230;\u53ea\u662f\u4e00\u79cd\u65f6\u95f4\u6027\u7684\u4e8b\u60c5\u5417\uff1f<\/p>\n<h2>\u5728select\u4e2d\u7684\u9ed8\u8ba4\u9009\u9879\u3002<\/h2>\n<p>\u5982\u679c\u6ca1\u6709\u5339\u914d\u7684case\uff0c\u5c06\u6267\u884cdefault\u7684\u4ee3\u7801\u5757\u3002<br \/>\n\u5982\u679c\u4e0d\u60f3\u963b\u585e\u53d1\u9001\u548c\u63a5\u6536\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528default\u3002<\/p>\n<h2>\u4e8c\u8fdb\u5236\u6811<\/h2>\n<p>\u904d\u5386\u4e8c\u53c9\u6811\uff0c\u68c0\u67e5\u503c\u662f\u5426\u4ee5\u76f8\u540c\u987a\u5e8f\u4fdd\u6301\u3002\u56e0\u4e3a\u6211\u5df2\u7ecf\u5fd8\u8bb0\u4e4b\u524d\u5728\u5b66\u6821\u7684 C \u8bfe\u4e0a\u5b66\u8fc7\u8fd9\u4e2a\uff0c\u6240\u4ee5\u53ea\u9700\u8981\u4e00\u4e2a\u9009\u9879\u3002<\/p>\n<blockquote><p>\u5728\u8bb8\u591a\u5176\u4ed6\u8bed\u8a00\u4e2d\uff0c\u68c0\u67e5\u4e24\u4e2a\u4e8c\u53c9\u6811\u662f\u5426\u4ee5\u76f8\u540c\u7684\u987a\u5e8f\u4fdd\u6301\u5143\u7d20\u662f\u975e\u5e38\u590d\u6742\u7684\u3002<\/p><\/blockquote>\n<p>\u5e0c\u671b\u80fd\u5728\u5c1d\u8bd5\u4e86Python\u4e4b\u540e\uff0c\u518d\u8fdb\u884c\u6bd4\u8f83\uff0c\u4ee5\u4fbf\u66f4\u597d\u5730\u4f53\u9a8cGo\u7684\u4fbf\u5229\u4e4b\u5904\u3002<\/p>\n<h2>\u7f51\u7edc\u722c\u866b<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u3042\u308bURL\u304c\u53d6\u5f97\u6e08\u307f\u304b\u3069\u3046\u304b\u306e\u5c65\u6b74\u3092\u53d6\u308b (map \u3067)<\/ul>\n<\/li>\n<\/ul>\n<p>go \u3068 ch := make(chan \u4f55\u304b\u306e\u578b) \u3092\u4f7f\u3046<br \/>\n\u30b9\u30b1\u30eb\u30c8\u30f3\u4e0a\u3067\u306f\u518d\u5e30\u3092\u3067 Crawl \u306e depth \u3092\u6e1b\u3089\u3057\u3066\u3044\u3063\u3066\u30010 \u306b\u306a\u3063\u305f\u3089\u8131\u51fa\u3057\u3066\u308b<\/p>\n<p>\u6211\u4e86\u89e3\u5230\u90a3\u91cc\uff0c\u4f46\u4ece\u90a3\u4e4b\u540e\u5c31\u4e0d\u660e\u767d\u4e86&#8230;<\/p>\n<p>\u6211\u770b\u4e86\u7b54\u6848\u7684\u4f8b\u5b50\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/ Copyright 2012 The Go Authors.  All rights reserved.<\/span>\r\n<span class=\"c\">\/\/ Use of this source code is governed by a BSD-style<\/span>\r\n<span class=\"c\">\/\/ license that can be found in the LICENSE file.<\/span>\r\n\r\n<span class=\"c\">\/\/ +build ignore<\/span>\r\n\r\n<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\">\"errors\"<\/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\">\/\/ fetched tracks URLs that have been (or are being) fetched.<\/span>\r\n<span class=\"c\">\/\/ The lock must be held while reading from or writing to the map.<\/span>\r\n<span class=\"c\">\/\/ See http:\/\/golang.org\/ref\/spec#Struct_types section on embedded types.<\/span>\r\n<span class=\"k\">var<\/span> <span class=\"n\">fetched<\/span> <span class=\"o\">=<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">m<\/span> <span class=\"k\">map<\/span><span class=\"p\">[<\/span><span class=\"kt\">string<\/span><span class=\"p\">]<\/span><span class=\"kt\">error<\/span>\r\n    <span class=\"n\">sync<\/span><span class=\"o\">.<\/span><span class=\"n\">Mutex<\/span>\r\n<span class=\"p\">}{<\/span><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\">error<\/span><span class=\"p\">)}<\/span>\r\n\r\n<span class=\"k\">var<\/span> <span class=\"n\">loading<\/span> <span class=\"o\">=<\/span> <span class=\"n\">errors<\/span><span class=\"o\">.<\/span><span class=\"n\">New<\/span><span class=\"p\">(<\/span><span class=\"s\">\"url load in progress\"<\/span><span class=\"p\">)<\/span> <span class=\"c\">\/\/ sentinel value<\/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\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"depth: %v<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">depth<\/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=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"&lt;- Done with %v, depth 0.<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">url<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"k\">return<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"n\">fetched<\/span><span class=\"o\">.<\/span><span class=\"n\">Lock<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">_<\/span><span class=\"p\">,<\/span> <span class=\"n\">ok<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">fetched<\/span><span class=\"o\">.<\/span><span class=\"n\">m<\/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=\"n\">fetched<\/span><span class=\"o\">.<\/span><span class=\"n\">Unlock<\/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\">\"&lt;- Done with %v, already fetched.<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">url<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"k\">return<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"c\">\/\/ We mark the url to be loading to avoid others reloading it at the same time.<\/span>\r\n    <span class=\"n\">fetched<\/span><span class=\"o\">.<\/span><span class=\"n\">m<\/span><span class=\"p\">[<\/span><span class=\"n\">url<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"n\">loading<\/span>\r\n    <span class=\"n\">fetched<\/span><span class=\"o\">.<\/span><span class=\"n\">Unlock<\/span><span class=\"p\">()<\/span>\r\n\r\n    <span class=\"c\">\/\/ We load it concurrently.<\/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\r\n    <span class=\"c\">\/\/ And update the status in a synced zone.<\/span>\r\n    <span class=\"n\">fetched<\/span><span class=\"o\">.<\/span><span class=\"n\">Lock<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"n\">fetched<\/span><span class=\"o\">.<\/span><span class=\"n\">m<\/span><span class=\"p\">[<\/span><span class=\"n\">url<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"n\">err<\/span>\r\n    <span class=\"n\">fetched<\/span><span class=\"o\">.<\/span><span class=\"n\">Unlock<\/span><span class=\"p\">()<\/span>\r\n\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\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"&lt;- Error on %v: %v<\/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\">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\">done<\/span> <span class=\"o\">:=<\/span> <span class=\"nb\">make<\/span><span class=\"p\">(<\/span><span class=\"k\">chan<\/span> <span class=\"kt\">bool<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">i<\/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=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"-&gt; Crawling child %v\/%v of %v : %v.<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">i<\/span><span class=\"p\">,<\/span> <span class=\"nb\">len<\/span><span class=\"p\">(<\/span><span class=\"n\">urls<\/span><span class=\"p\">),<\/span> <span class=\"n\">url<\/span><span class=\"p\">,<\/span> <span class=\"n\">u<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"k\">go<\/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=\"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=\"o\">-<\/span><span class=\"m\">1<\/span><span class=\"p\">,<\/span> <span class=\"n\">fetcher<\/span><span class=\"p\">)<\/span>\r\n            <span class=\"n\">done<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"no\">true<\/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=\"k\">for<\/span> <span class=\"n\">i<\/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=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"&lt;- [%v] %v\/%v Waiting for child %v.<\/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\">i<\/span><span class=\"p\">,<\/span> <span class=\"nb\">len<\/span><span class=\"p\">(<\/span><span class=\"n\">urls<\/span><span class=\"p\">),<\/span> <span class=\"n\">u<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"o\">&lt;-<\/span><span class=\"n\">done<\/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\">\"&lt;- Done with %v<\/span><span class=\"se\">\\n<\/span><span class=\"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=\"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\">\"http:\/\/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\r\n    <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Println<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Fetching stats<\/span><span class=\"se\">\\n<\/span><span class=\"s\">--------------\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">url<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"n\">fetched<\/span><span class=\"o\">.<\/span><span class=\"n\">m<\/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\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%v failed: %v<\/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\">err<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"p\">}<\/span> <span class=\"k\">else<\/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 was fetched<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">url<\/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<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=\"o\">*<\/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=\"p\">(<\/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=\"o\">&amp;<\/span><span class=\"n\">fakeFetcher<\/span><span class=\"p\">{<\/span>\r\n    <span class=\"s\">\"http:\/\/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\">\"http:\/\/golang.org\/pkg\/\"<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"s\">\"http:\/\/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\">\"http:\/\/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\">\"http:\/\/golang.org\/\"<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"s\">\"http:\/\/golang.org\/cmd\/\"<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"s\">\"http:\/\/golang.org\/pkg\/fmt\/\"<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"s\">\"http:\/\/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\">\"http:\/\/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\">\"http:\/\/golang.org\/\"<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"s\">\"http:\/\/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\">\"http:\/\/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\">\"http:\/\/golang.org\/\"<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"s\">\"http:\/\/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<\/code><\/pre>\n<p>Crawl() \u81ea\u4f53\u3092\u4e26\u884c\u51e6\u7406\u3059\u308b\u308f\u3051\u3067\u306f\u306a\u304f\u3001 Crawl() \u306e\u4e2d\u3067\u4e26\u884c\u51e6\u7406\u3059\u308b<\/p>\n<p>\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\u51e6\u7406\u81ea\u4f53\u306f Fetcher \u306e\u4ed5\u4e8b\u306a\u306e\u3067\u3001\u4e26\u884c\u306b\u3059\u308b\u306e\u306f\u305d\u3044\u3064<\/p>\n<p>sync.Mutex \u3068\u304b .Lock(), .Unlock() \u3068\u304b\u4f7f\u3063\u3066\u308b<\/p>\n<p>\u30ed\u30c3\u30af\u6a5f\u69cb\u3067\u30c7\u30fc\u30bf\u306e\u66f8\u304d\u8fbc\u307f\u306e\u30d0\u30c3\u30c6\u30a3\u30f3\u30b0\u3092\u907f\u3051\u3066\u3044\u308b<\/p>\n<p>fetched.m[url] = loading \u2192 fetched.m[url] = err \u3067\u72b6\u614b\u7ba1\u7406\u3057\u3066\u308b\u3002 err \u306b\u306f fetcher.Fetch(url) \u306e\u30a8\u30e9\u30fc\u7d50\u679c\u304c\u5165\u308b\u306e\u3067\u3001\u6b63\u5e38\u7d42\u4e86\u306e\u5834\u5408\u306f nil \u304c\u5165\u308b<br \/>\n\u305d\u308c\u305e\u308c\u306e body \u3092\u3069\u306e for \u3067\u8aad\u307f\u3060\u3057\u3066\u3044\u308b\u304b<\/p>\n<p>for \u3067\u306f\u306a\u304f\u3001 (*f)[url] \u3092\u518d\u5e30\u7684\u306b\u53c2\u7167\u3057\u3066\u3044\u3063\u3066\u3044\u308b<\/p>\n<p>depth \u304c\u30c7\u30af\u30ea\u30e1\u30f3\u30c8\u3055\u308c\u3066\u3044\u304d\u30010 \u306b\u306a\u308b\u3068 Crawl() \u306e\u518d\u5e30\u30eb\u30fc\u30d7\u304b\u3089 return \u3055\u308c\u308b\u3002<\/p>\n<p>done \u306f\u4f55\u306e\u305f\u3081\u306b\u3042\u308b\u306e\u304b\u3002\u524a\u9664\u3059\u308b\u3068\u3069\u3046\u306a\u308b\u304b\u3002<\/p>\n<p>done &lt;- true \u3092\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3059\u308b\u3068<\/p>\n<p>fatal error: all goroutines are asleep &#8211; deadlock!<\/p>\n<p>goroutine 16 [chan receive]:<br \/>\nmain.Crawl(0xda590, 0x12, 0x4, 0x2208190318, 0x14aef8)<br \/>\n\/golang\/tour71.go:73 +0xb9d<br \/>\nmain.main()<br \/>\n\/golang\/tour71.go:79 +0x78<\/p>\n<p>goroutine 19 [finalizer wait]:<br \/>\nruntime.park(0x162c0, 0x14ae50, 0x14a209)<br \/>\n\/usr\/local\/go\/src\/pkg\/runtime\/proc.c:1369 +0x89<br \/>\nruntime.parkunlock(0x14ae50, 0x14a209)<br \/>\n\/usr\/local\/go\/src\/pkg\/runtime\/proc.c:1385 +0x3b<br \/>\nrunfinq()<br \/>\n\/usr\/local\/go\/src\/pkg\/runtime\/mgc0.c:2644 +0xcf<br \/>\nruntime.goexit()<br \/>\n\/usr\/local\/go\/src\/pkg\/runtime\/proc.c:1445<\/p>\n<p>goroutine 20 [chan receive]:<br \/>\nmain.Crawl(0xda610, 0x16, 0x3, 0x2208190318, 0x14aef8)<br \/>\n\/golang\/tour71.go:73 +0xb9d<br \/>\nmain.func\u00b7001(0xda610, 0x16)<br \/>\n\/golang\/tour71.go:67 +0x50<br \/>\ncreated by main.Crawl<br \/>\n\/golang\/tour71.go:69 +0x977<\/p>\n<p>goroutine 24 [chan receive]:<br \/>\nmain.Crawl(0xe0050, 0x1a, 0x2, 0x2208190318, 0x14aef8)<br \/>\n\/golang\/tour71.go:73 +0xb9d<br \/>\nmain.func\u00b7001(0xe0050, 0x1a)<br \/>\n\/golang\/tour71.go:67 +0x50<br \/>\ncreated by main.Crawl<br \/>\n\/golang\/tour71.go:69 +0x977<\/p>\n<p>goroutine 25 [chan receive]:<br \/>\nmain.Crawl(0xe0090, 0x19, 0x2, 0x2208190318, 0x14aef8)<br \/>\n\/golang\/tour71.go:73 +0xb9d<br \/>\nmain.func\u00b7001(0xe0090, 0x19)<br \/>\n\/golang\/tour71.go:67 +0x50<br \/>\ncreated by main.Crawl<br \/>\n\/golang\/tour71.go:69 +0x977<br \/>\nexit status 2<\/p>\n<p>done \u30c1\u30e3\u30f3\u30cd\u30eb\u306b\u30c7\u30fc\u30bf\u304c\u5165\u3089\u306a\u3044\u3068 &lt;-done \u304c\u305a\u3063\u3068\u5f85\u6a5f\u306b\u306a\u308b\u306e\u3067\u7d42\u4e86\u3057\u305f\u611f\u3058\u304b\u306a\u2026<br \/>\n&#8211; &lt;-done \u3092\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3059\u308b\u3068\u3001 depth: 4 Found: http:\/\/golang.org\/ &#8220;The Go Programming Language&#8221; -&gt; Crawling child 0\/2 of http:\/\/golang.org\/ : http:\/\/golang.org\/pkg\/.<br \/>\n-&gt; Crawling child 1\/2 of http:\/\/golang.org\/ : http:\/\/golang.org\/cmd\/.<br \/>\n&lt;- [http:\/\/golang.org\/] 0\/2 Waiting for child http:\/\/golang.org\/pkg\/.<br \/>\n&lt;- [http:\/\/golang.org\/] 1\/2 Waiting for child http:\/\/golang.org\/cmd\/.<br \/>\n&lt;- Done with http:\/\/golang.org\/<br \/>\nFetching stats<br \/>\n&#8212;&#8212;&#8212;&#8212;&#8211;<br \/>\nhttp:\/\/golang.org\/ was fetched<\/p>\n<p>\u3067\u7d42\u308f\u3063\u305f (\u30c7\u30fc\u30bf\u304c\u5168\u3066\u30c8\u30e9\u30d0\u30fc\u30b9\u3055\u308c\u3066\u306a\u3044\u307e\u307e\u7d42\u308f\u3063\u305f)\u3002<br \/>\ndone \u30c1\u30e3\u30f3\u30cd\u30eb\u304c\u540c\u671f\u306e\u5f79\u5272\u3092\u3057\u3066\u3044\u3066\u3001&lt;-done \u306e\u3042\u308b\u30d6\u30ed\u30c3\u30af\u306f go \u3092\u639b\u3051\u305f\u30d6\u30ed\u30c3\u30af\u306e\u7d42\u4e86\u3092\u5f85\u6a5f\u3057\u3066\u3044\u308b\u72b6\u614b\u306b\u306a\u3063\u3066\u3044\u308b\u3002<\/p>\n<p>\u5b66\u4e60 C \u8bed\u8a00\u7684 fork \u529f\u80fd\u7684\u65f6\u5019\u611f\u5230\u7c7b\u4f3c&#8230;\u5f88\u96be&#8230;<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">func<\/span> <span class=\"n\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">buf<\/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=\"m\">5<\/span><span class=\"p\">)<\/span>  <span class=\"c\">\/\/ (A) \u30d0\u30c3\u30d5\u30a1\u3068\u3057\u3066\u4f7f\u3046<\/span>\r\n    <span class=\"n\">buf<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"m\">1<\/span>\r\n    <span class=\"n\">buf<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"m\">2<\/span>\r\n    <span class=\"n\">buf<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"m\">4<\/span>\r\n    <span class=\"n\">buf<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"m\">8<\/span>\r\n    <span class=\"nb\">close<\/span><span class=\"p\">(<\/span><span class=\"n\">buf<\/span><span class=\"p\">)<\/span>  <span class=\"c\">\/\/ (B) \u3053\u308c\u304c\u306a\u3044\u3068\u2193\u306erange\u30eb\u30fc\u30d7\u306e\u7d42\u4e86\u304c\u51fa\u6765\u306a\u3044<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">v<\/span> <span class=\"o\">:=<\/span> <span class=\"k\">range<\/span> <span class=\"n\">buf<\/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\">v<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">(A) \u30d0\u30c3\u30d5\u30a1\u3068\u3057\u3066\u4f7f\u3046\u5834\u5408\u306f\u3001 make() \u306e\u7b2c2\u5f15\u6570\u306e\u5927\u304d\u3055\u6307\u5b9a\u304c\u7121\u3044\u3068\u30c0\u30e1<\/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\">(B): \u300c\u3082\u3046\u30c1\u30e3\u30f3\u30cd\u30eb\u306b\u306f\u9001\u4fe1\u3057\u306a\u3044\u3088\u300d\u3068\u3044\u3046 close(ch) \u304c\u306a\u3044\u3068\u3001 range \u30eb\u30fc\u30d7\u304c\u3061\u3083\u3093\u3068\u7d42\u4e86\u3057\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">(A), (B) \u305d\u308c\u305e\u308c\u3001\u307e\u305f\u306f\u4e21\u65b9\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3057\u3066\u307f\u308b\u3068\u4e0b\u8a18\u30a8\u30e9\u30fc\u304c\u51fa\u308b<\/ul>\n<pre class=\"post-pre\"><code>  fatal error: all goroutines are asleep - deadlock!\r\n<\/code><\/pre>\n<p>\u6839\u636egolang.jp\u4e0a\u7684\u300a\u5b9e\u8df5Go\u8bed\u8a00\u300b\u6240\u8ff0\uff0c<\/p>\n<blockquote><p>\u4e0e\u5730\u56fe\u4e00\u6837\uff0c\u901a\u9053\u4e5f\u662f\u5f15\u7528\u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528make\u8fdb\u884c\u5206\u914d\u3002\u5728\u521b\u5efa\u65f6\uff0c\u5982\u679c\u6307\u5b9a\u4e86\u6574\u6570\u53c2\u6570\uff0c\u8be5\u53c2\u6570\u5c06\u7528\u4f5c\u901a\u9053\u7684\u7f13\u51b2\u533a\u5927\u5c0f\u3002\u8be5\u503c\u7684\u9ed8\u8ba4\u503c\u4e3a\u96f6\uff0c\u5f53\u503c\u4e3a\u96f6\u65f6\uff0c\u4e0d\u4f1a\u8fdb\u884c\u7f13\u51b2\uff0c\u800c\u662f\u53d8\u6210\u540c\u6b65\u901a\u9053\u3002<\/p>\n<p>\u5730\u56fe\u548c\u901a\u9053\u4e00\u6837\uff0c\u4e5f\u662f\u5f15\u7528\u578b\u7684\uff0c\u53ef\u4ee5\u4f7f\u7528make\u51fd\u6570\u8fdb\u884c\u5206\u914d\u3002\u5728\u521b\u5efa\u65f6\uff0c\u5982\u679c\u6307\u5b9a\u4e86\u6574\u6570\u53c2\u6570\uff0c\u8be5\u53c2\u6570\u5c06\u7528\u4f5c\u901a\u9053\u7684\u7f13\u51b2\u533a\u5927\u5c0f\u3002\u8fd9\u4e2a\u503c\u7684\u9ed8\u8ba4\u503c\u662f\u96f6\uff0c\u5f53\u4e3a\u96f6\u65f6\uff0c\u5c06\u4e0d\u8fdb\u884c\u7f13\u51b2\uff0c\u800c\u53d8\u6210\u540c\u6b65\u901a\u9053\u3002<\/p><\/blockquote>\n<p>\u7531\u4e8e\u6b64\u6b21\u7684Web\u722c\u866b\u7a0b\u5e8f\u4e2d\u6ca1\u6709\u4e3amake()\u6307\u5b9a\u5927\u5c0f\uff0c\u56e0\u6b64\u5b83\u5c06\u88ab\u7528\u4f5c\u540c\u6b65\u901a\u9053\u3002<\/p>\n<p>\u7b80\u5355\u7684\u9891\u9053\u4f7f\u7528\u4e60\u8bed\u793a\u4f8b\uff08\u6765\u81ea\u5b9e\u8df5Go\u8bed\u8a00 &#8211; golang.jp\uff09<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">go<\/span> <span class=\"n\">list<\/span><span class=\"o\">.<\/span><span class=\"n\">Sort<\/span><span class=\"p\">()<\/span>  <span class=\"c\">\/\/ list.Sort\u3092\u4e26\u5217\u5b9f\u884c\u3059\u308b(\u51e6\u7406\u306e\u5b8c\u4e86\u306f\u5f85\u305f\u306a\u3044)<\/span>\r\n<\/code><\/pre>\n<blockquote><p>\u6709\u5f88\u591a\u4f7f\u7528\u901a\u9053\u7684\u51fa\u8272\u6210\u8a9e\uff0c\u4f46\u9996\u5148\u4ecb\u7d39\u4e00\u500b\u3002\u5728\u524d\u4e00\u7bc0\u4e2d\uff0c\u6211\u5011\u5728\u5f8c\u53f0\u4e2d\u555f\u52d5\u4e86\u6392\u5e8f\u8655\u7406\uff0c\u4f46\u662f\u53ef\u4ee5\u901a\u904e\u4f7f\u7528\u901a\u9053\uff0c\u6539\u70ba\u7b49\u5f85\u4f7f\u7528\u901a\u9053\u555f\u52d5\u7684goroutine\u5b8c\u6210\u6392\u5e8f\u3002<\/p><\/blockquote>\n<pre class=\"post-pre\"><code><span class=\"n\">c<\/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=\"c\">\/\/ \u30c1\u30e3\u30cd\u30eb\u306e\u5272\u308a\u5f53\u3066<\/span>\r\n<span class=\"c\">\/\/ \u30b4\u30eb\u30fc\u30c1\u30f3\u3068\u3057\u3066sort\u3092\u8d77\u52d5\u3002\u5b8c\u4e86\u6642\u306b\u30c1\u30e3\u30cd\u30eb\u3078\u901a\u77e5<\/span>\r\n<span class=\"k\">go<\/span> <span class=\"k\">func<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">list<\/span><span class=\"o\">.<\/span><span class=\"n\">Sort<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"n\">c<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"m\">1<\/span>  <span class=\"c\">\/\/ \u901a\u77e5\u3092\u9001\u4fe1\u3002\u5024\u306f\u4f55\u3067\u3082\u826f\u3044<\/span>\r\n<span class=\"p\">}()<\/span>\r\n<span class=\"n\">doSomethingForAWhile<\/span><span class=\"p\">()<\/span>\r\n<span class=\"o\">&lt;-<\/span><span class=\"n\">c<\/span>   <span class=\"c\">\/\/ sort\u306e\u5b8c\u4e86\u5f85\u3061\u3002\u9001\u3089\u308c\u3066\u304d\u305f\u5024\u306f\u7834\u68c4<\/span>\r\n<\/code><\/pre>\n<blockquote><p>\u5728\u63a5\u6536\u7aef\uff0c\u76f4\u5230\u53ef\u4ee5\u63a5\u6536\u5230\u6570\u636e\u4e3a\u6b62\uff0c\u4f1a\u4e00\u76f4\u88ab\u963b\u585e\u3002\u53d1\u9001\u7aef\u5728\u901a\u9053\u6ca1\u6709\u7f13\u51b2\u65f6\uff0c\u4f1a\u4e00\u76f4\u88ab\u963b\u585e\uff0c\u76f4\u5230\u63a5\u6536\u7aef\u63a5\u6536\u5230\u503c\u3002\u5f53\u901a\u9053\u7f13\u51b2\u65f6\uff0c\u53d1\u9001\u7aef\u53ea\u4f1a\u5728\u503c\u88ab\u590d\u5236\u5230\u7f13\u51b2\u533a\u671f\u95f4\u88ab\u963b\u585e\u3002\u56e0\u6b64\uff0c\u5f53\u7f13\u51b2\u533a\u5df2\u6ee1\u65f6\uff0c\u4f1a\u4e00\u76f4\u7b49\u5f85\u5728\u63a5\u6536\u7aef\u53d6\u51fa\u503c\u4e3a\u6b62\u3002<\/p><\/blockquote>\n<p>\u6765\u81eatour64<\/p>\n<blockquote><p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u53d1\u9001\u548c\u63a5\u6536\u5c06\u88ab\u963b\u585e\uff0c\u76f4\u5230\u53e6\u4e00\u65b9\u51c6\u5907\u5b8c\u6bd5\u3002\u8fd9\u6837\uff0c\u5373\u4f7f\u6ca1\u6709\u660e\u786e\u7684\u9501\u6216\u6761\u4ef6\u53d8\u91cf\uff0c\u4e5f\u53ef\u4ee5\u540c\u6b65goroutine\u3002<\/p><\/blockquote>\n<p>\u4ece\u65c5\u6e3865<\/p>\n<blockquote><p>\u53ea\u6709\u5728\u7f13\u51b2\u533a\u6ee1\u65f6\uff0c\u624d\u4f1a\u5c06\u53d1\u9001\u7684\u6570\u636e\u963b\u585e\u5728\u7f13\u51b2\u901a\u9053\u91cc\u3002\u5f53\u7f13\u51b2\u533a\u4e3a\u7a7a\u65f6\uff0c\u4f1a\u963b\u585e\u63a5\u6536\u3002<\/p><\/blockquote>\n<p>\u6211\u6253\u7b97\u5148\u8bfb\u4e00\u4e0b\u4e0b\u9762\u7684\u5185\u5bb9\u5e76\u8bd5\u7740\u7406\u89e3\u4e00\u4e0b\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30cf\u30ed\u30fc\u3001goroutine\uff01 &#8211; \uff20IT<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Big Sky :: Golang \u306e channel \u306e\u4f7f\u3044\u6240<\/ul>\n<p>\u6682\u65f6\u5c31\u8fd9\u6837\u5427\u3002\u63a5\u4e0b\u6765\u60f3\u8fb9\u5199\u5e94\u7528\u7a0b\u5e8f\u8fb9\u590d\u4e60\u3002\u54ce\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u4e00\u5185\u5bb9\u4e3a2014\u5e747\u6708\u65f6\u7684\u8d44\u6599\u3002 The code of &#8220;A Tour of Go&#038;#8221 [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44652","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>\u6211\u81ea\u5df1\u7684\u7b14\u8bb0\uff1a\u5b66\u4e60Golang-\u8ddf\u7740\u300aGo\u4e4b\u65c5\u300b\u8fdb\u884c - 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\/\u6211\u81ea\u5df1\u7684\u7b14\u8bb0\uff1a\u5b66\u4e60golang-\u8ddf\u7740\u300ago\u4e4b\u65c5\u300b\u8fdb\u884c\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6211\u81ea\u5df1\u7684\u7b14\u8bb0\uff1a\u5b66\u4e60Golang-\u8ddf\u7740\u300aGo\u4e4b\u65c5\u300b\u8fdb\u884c\" \/>\n<meta property=\"og:description\" content=\"\u8fd9\u4e00\u5185\u5bb9\u4e3a2014\u5e747\u6708\u65f6\u7684\u8d44\u6599\u3002 The code of &#8220;A Tour of Go&amp;#8221 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u6211\u81ea\u5df1\u7684\u7b14\u8bb0\uff1a\u5b66\u4e60golang-\u8ddf\u7740\u300ago\u4e4b\u65c5\u300b\u8fdb\u884c\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-14T03:49:26+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-30T09:13:54+00:00\" \/>\n<meta name=\"author\" content=\"\u96c5, \u609f\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u96c5, \u609f\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"15 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/\",\"name\":\"\u6211\u81ea\u5df1\u7684\u7b14\u8bb0\uff1a\u5b66\u4e60Golang-\u8ddf\u7740\u300aGo\u4e4b\u65c5\u300b\u8fdb\u884c - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-07-14T03:49:26+00:00\",\"dateModified\":\"2024-04-30T09:13:54+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/f044a4b7fa4ee2701702942002419ca6\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.silicloud.com\/zh\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u6211\u81ea\u5df1\u7684\u7b14\u8bb0\uff1a\u5b66\u4e60Golang-\u8ddf\u7740\u300aGo\u4e4b\u65c5\u300b\u8fdb\u884c\"}]},{\"@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\/f044a4b7fa4ee2701702942002419ca6\",\"name\":\"\u96c5, \u609f\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/e71a913e914f1aad1efc391f92084294bac54bc782acd289638580134cf667a6?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/e71a913e914f1aad1efc391f92084294bac54bc782acd289638580134cf667a6?s=96&d=mm&r=g\",\"caption\":\"\u96c5, \u609f\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/yawu\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"\u6211\u81ea\u5df1\u7684\u7b14\u8bb0\uff1a\u5b66\u4e60Golang-\u8ddf\u7740\u300aGo\u4e4b\u65c5\u300b\u8fdb\u884c - Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/\u6211\u81ea\u5df1\u7684\u7b14\u8bb0\uff1a\u5b66\u4e60golang-\u8ddf\u7740\u300ago\u4e4b\u65c5\u300b\u8fdb\u884c\u3002\/","og_locale":"zh_CN","og_type":"article","og_title":"\u6211\u81ea\u5df1\u7684\u7b14\u8bb0\uff1a\u5b66\u4e60Golang-\u8ddf\u7740\u300aGo\u4e4b\u65c5\u300b\u8fdb\u884c","og_description":"\u8fd9\u4e00\u5185\u5bb9\u4e3a2014\u5e747\u6708\u65f6\u7684\u8d44\u6599\u3002 The code of &#8220;A Tour of Go&#8221 [&hellip;]","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/\u6211\u81ea\u5df1\u7684\u7b14\u8bb0\uff1a\u5b66\u4e60golang-\u8ddf\u7740\u300ago\u4e4b\u65c5\u300b\u8fdb\u884c\u3002\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-07-14T03:49:26+00:00","article_modified_time":"2024-04-30T09:13:54+00:00","author":"\u96c5, \u609f","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u96c5, \u609f","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"15 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/","name":"\u6211\u81ea\u5df1\u7684\u7b14\u8bb0\uff1a\u5b66\u4e60Golang-\u8ddf\u7740\u300aGo\u4e4b\u65c5\u300b\u8fdb\u884c - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website"},"datePublished":"2023-07-14T03:49:26+00:00","dateModified":"2024-04-30T09:13:54+00:00","author":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/f044a4b7fa4ee2701702942002419ca6"},"breadcrumb":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.silicloud.com\/zh\/blog\/"},{"@type":"ListItem","position":2,"name":"\u6211\u81ea\u5df1\u7684\u7b14\u8bb0\uff1a\u5b66\u4e60Golang-\u8ddf\u7740\u300aGo\u4e4b\u65c5\u300b\u8fdb\u884c"}]},{"@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\/f044a4b7fa4ee2701702942002419ca6","name":"\u96c5, \u609f","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/e71a913e914f1aad1efc391f92084294bac54bc782acd289638580134cf667a6?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/e71a913e914f1aad1efc391f92084294bac54bc782acd289638580134cf667a6?s=96&d=mm&r=g","caption":"\u96c5, \u609f"},"url":"https:\/\/www.silicloud.com\/zh\/blog\/author\/yawu\/"},{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%87%aa%e5%b7%b1%e7%9a%84%e7%ac%94%e8%ae%b0%ef%bc%9a%e5%ad%a6%e4%b9%a0golang-%e8%b7%9f%e7%9d%80%e3%80%8ago%e4%b9%8b%e6%97%85%e3%80%8b%e8%bf%9b%e8%a1%8c%e3%80%82\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/44652","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/comments?post=44652"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/44652\/revisions"}],"predecessor-version":[{"id":93211,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/44652\/revisions\/93211"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/media?parent=44652"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/categories?post=44652"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/tags?post=44652"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}