{"id":44078,"date":"2023-02-03T01:25:24","date_gmt":"2024-01-31T23:42:25","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/golang-%e5%bf%ab%e9%80%9f%e5%8f%82%e8%80%83%e6%89%8b%e5%86%8c\/"},"modified":"2024-04-29T12:51:27","modified_gmt":"2024-04-29T04:51:27","slug":"golang-%e5%bf%ab%e9%80%9f%e5%8f%82%e8%80%83%e6%89%8b%e5%86%8c","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/golang-%e5%bf%ab%e9%80%9f%e5%8f%82%e8%80%83%e6%89%8b%e5%86%8c\/","title":{"rendered":"Golang \u5feb\u901f\u53c2\u8003\u624b\u518c"},"content":{"rendered":"

\u9010\u6e10\u589e\u52a0\u8bb0\u5f55\u7684\u81ea\u5df1\u5b66\u4e60\u5185\u5bb9\u3002<\/p>\n

Go\u4e4b\u65c5\uff08\u82f1\u6587\uff09\u8bf7\u5148\u9605\u8bfbA Tour of Go\uff08\u65e5\u6587\uff09<\/p>\n

\u4ee5\u4e0b\u5185\u5bb9\u4e5f\u5fc5\u987b\u9605\u8bfb\uff1a
\n\u5b9e\u8df5Go\u8bed\u8a00
\nGo\u7f16\u7a0b\u8bed\u8a00\u89c4\u8303<\/p>\n

\u5728\u63a5\u4e0b\u6765\u7684\u8bf4\u660e\u4e2d\uff0c\u7701\u7565\u4e86main()\u7684\u5b9a\u4e49\u548c\u5176\u4ed6\u5197\u957f\u7684\u90e8\u5206\u3002\u8bf7\u6839\u636e\u4e0a\u4e0b\u6587\u8fdb\u884c\u7406\u89e3\u548c\u8865\u5145\u3002<\/p>\n

\u4e0b\u8f7d<\/h2>\n

\u4e0b\u8f7dGo<\/p>\n

\u4f60\u597d\u4e16\u754c<\/h2>\n
package<\/span> main<\/span>\r\nimport<\/span> \"fmt\"<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n fmt<\/span>.<\/span>Printf<\/span>(<\/span>\"Hello, world.<\/span>\\n<\/span>\"<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7f16\u8bd1<\/p>\n
go build hello.go   # \u30b3\u30de\u30f3\u30c9hello\u304c\u4f5c\u6210\u3055\u308c\u308b\r\n<\/code><\/pre>\n
\u6267\u884c<\/p>\n
.\/hello\r\nHello, World.\r\n<\/code><\/pre>\n
\u7f16\u8bd1\u548c\u6267\u884c<\/p>\n
go run hello.go   \/\/ \u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u3092tmp\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u751f\u6210\u3057\u3066\u5b9f\u884c\r\nHello, World.\r\n<\/code><\/pre>\n
\u8bed\u8a00\u7684\u7279\u70b9 de<\/h2>\n
\n
\u7279\u5fb4\u8aac\u660e\u30b3\u30f3\u30d1\u30a4\u30eb\u8a00\u8a9e
\n\u6587\u5b57\u306e\u5927\u5c0f\u533a\u5225\u3059\u308b\u5f0f(expression)\u3068\u6587(statement)\u533a\u5225\u3042\u308a\u5f0f\u3092\u8981\u6c42\u3059\u308b\u5834\u6240\u306b\u6587\u306f\u66f8\u3051\u306a\u3044\u3002\u30e1\u30e2\u30ea\u7ba1\u7406\u30ac\u30fc\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3(mark&sweep)else ifelse if++, –\u3042\u308a\u3002\u305f\u3060\u3057\u5f8c\u7f6e\u306e\u307f\u3002\u6587\u306a\u306e\u3067\u5f0f\u306b\u66f8\u3051\u306a\u3044\u3002<\/div>\n<\/div>\n
\u7248\u672c\u786e\u8ba4<\/h2>\n
go version\r\n<\/code><\/pre>\n
\u8bc4\u8bba<\/h2>\n
\n
\u30b3\u30e1\u30f3\u30c8\u5f62\u5f0f\u30b3\u30e1\u30f3\u30c8\u7bc4\u56f2\u884c\u30b3\u30e1\u30f3\u30c8\/\/<\/code> \u304b\u3089\u6539\u884c\u307e\u3067\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\/*<\/code> \u304b\u3089 *\/<\/code> \u307e\u3067(\u30cd\u30b9\u30c8\u4e0d\u53ef)<\/div>\n<\/div>\n
\u53d8\u91cf<\/h2>\n
foo\r\nBar\r\nBAZ\r\n<\/code><\/pre>\n
\u662f\u5426\u4ee5\u5927\u5199\u5b57\u6bcd\u5f00\u5934\u662f\u6709\u610f\u4e49\u7684\uff08\u5982\u679c\u4ee5\u5927\u5199\u5b57\u6bcd\u5f00\u5934\uff0c\u5c06\u88ab\u5bfc\u51fa\u5230\u5305\u5916\uff09\u3002<\/p>\n
\u672a\u88ab\u4f7f\u7528\u7684\u53d8\u91cf\u58f0\u660e\u4f1a\u5bfc\u81f4\u8bed\u6cd5\u9519\u8bef\u3002\u5982\u679c\u51fd\u6570\u7684\u8fd4\u56de\u503c\u4e2d\u5b58\u5728\u672a\u4f7f\u7528\u7684\u503c\uff0c\u5219\u53ef\u4ee5\u5c06\u5176\u8d4b\u503c\u7ed9”_”\u3002\u72ec\u7acb\u7684”_”\uff08\u7a7a\u6807\u8bc6\u7b26\uff09\u4e0d\u662f\u4e00\u4e2a\u53d8\u91cf\u3002<\/p>\n
_, err := foo()\r\n<\/code><\/pre>\n
\/\/ \u5b9a\u7fa9\r\n\r\nvar x int\r\nvar x int, y int\r\nvar x, y int\r\nvar (\r\n  x int\r\n  y int\r\n)\r\n\r\n\/\/ \u521d\u671f\u5316\u5b50(initializer)\r\n\/\/ \u521d\u671f\u5316\u5b50\u304c\u3042\u308c\u3070\u578b\u3092\u7701\u7565\u3067\u304d\u308b\r\n\r\nvar x, y int = 1, 2\r\nvar x, y = 1, 2\r\n\r\n\/\/ \u95a2\u6570\u306e\u4e2d\u306a\u3089 := \u306b\u3088\u308b\u5909\u6570\u5b9a\u7fa9\u3082\u3067\u304d\u308b\r\nx, y := 1, 2\r\n<\/code><\/pre>\n
\u4e00\u79cd\u9009\u62e9\u662f\u201c\u5b9a\u6570\u201d\u3002<\/h2>\n
\u5728\u7f16\u8bd1\u65f6\u8bc4\u4f30\u7684\u4ec5\u9650\u4e8e\u5b57\u7b26(character)\u3001\u5b57\u7b26\u4e32(string)\u3001\u5e03\u5c14(boolean)\u548c\u6570\u503c(numeric)\u7684\u9009\u9879\u3002<\/p>\n
const Pi = 3.14\r\n<\/code><\/pre>\n
\u5728\u62ec\u53f7\u4e2d\u7684const\u58f0\u660e\u4e2d\uff0c\u6bcf\u4e2a\u5e38\u91cf\u88ab\u8bbe\u7f6e\u4e3a\u4e0e\u7b2c\u4e00\u4e2a\u8868\u8fbe\u5f0f\u76f8\u540c\u7684\u503c\u3002<\/p>\n
const (\r\n   A = 1\r\n   B\r\n   C = 2\r\n)\r\nfmt.Println(A) \/\/ => 1\r\nfmt.Println(B) \/\/ => 1\r\nfmt.Println(C) \/\/ => 2\r\n<\/code><\/pre>\n
\u5217\u4e3e<\/h3>\n
\u901a\u8fc7\u5728\u58f0\u660e\u4e2d\u4f7f\u7528\u5e38\u6570\u751f\u6210\u5668 iota\uff0c\u53ef\u4ee5\u751f\u6210\u4ece0\u5f00\u59cb\u7684\u679a\u4e3e\u503c\uff08int\u7c7b\u578b\uff09\u3002<\/p>\n
const (\r\n   _ = iota  \/\/ blank identifier \u3092\u4f7f\u3048\u3070\u30010 \u3092\u7834\u68c4\u3067\u304d\u308b\r\n   A\r\n   B\r\n   C\r\n)\r\nfmt.Println(A) \/\/ => 1\r\nfmt.Println(B) \/\/ => 2\r\nfmt.Println(C) \/\/ => 3\r\n<\/code><\/pre>\n
\u5f53\u51fa\u73b0const\u58f0\u660e\u65f6\uff0ciota\u5c06\u88ab\u91cd\u7f6e\u4e3a0\u3002\u6b64\u5916\uff0c\u6bcf\u4e2a\u5e38\u91cf\u8868\u8fbe\u5f0f\u7684iota\u503c\u5c06\u9012\u589e\u3002<\/p>\n
const (\r\n   A = iota + iota   \/\/ 0 + 0 (\u540c\u3058\u5f0f\u306b\u4e8c\u56de\u73fe\u308c\u3066\u3082\u3001iota\u306e\u5024\u306f\u540c\u3058)\r\n   B                 \/\/ 1 + 1\r\n   C                 \/\/ 2 + 2\r\n)\r\nfmt.Println(A) \/\/ => 0\r\nfmt.Println(B) \/\/ => 2\r\nfmt.Println(C) \/\/ => 4\r\n<\/code><\/pre>\n
\u57fa\u672c\u5f62\u5f0f<\/h2>\n
bool\r\nstring\r\nint  int8  int16  int32  int64\r\nuint uint8 uint16 uint32 uint64 uintptr\r\nbyte \/\/ uint8 \u306e\u5225\u540d\r\nrune \/\/ int32 \u306e\u5225\u540d\r\n     \/\/ Unicode \u306e\u30b3\u30fc\u30c9\u30dd\u30a4\u30f3\u30c8\u3092\u8868\u3059\r\nfloat32 float64\r\ncomplex64 complex128\r\n<\/code><\/pre>\n
\u83b7\u53d6\u53d8\u91cf\u7684\u7c7b\u578b<\/h3>\n
import<\/span> \"reflect\"<\/span>\r\n\r\nfmt<\/span>.<\/span>Println<\/span>(<\/span>reflect<\/span>.<\/span>TypeOf<\/span>(<\/span>\"foo\"<\/span>))<\/span>  \/\/ => string<\/span>\r\n\r\n\/\/ \u8868\u793a\u3060\u3051\u306a\u3089\u3001\u66f8\u5f0f %T \u3082\u53ef<\/span>\r\nfmt<\/span>.<\/span>Printf<\/span>(<\/span>\"%T<\/span>\\n<\/span>\"<\/span>,<\/span> \"foo\"<\/span>)<\/span>  \/\/ => string<\/span>\r\n<\/code><\/pre>\n
\u96f6\u503c zh\u00ed)<\/h3>\n
\u6ca1\u6709\u8bbe\u7f6e\u521d\u59cb\u503c\u7684\u53d8\u91cf\u5c06\u88ab\u4ee5\u96f6\u503c\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n
\n
\u578b\u5024boolfalse\u6574\u6570\u578b0\u6d6e\u52d5\u5c0f\u6570\u70b9\u578b0.0string””\u30dd\u30a4\u30f3\u30bf\u3001\u95a2\u6570\u3001\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3001\u30b9\u30e9\u30a4\u30b9\u3001\u30c1\u30e3\u30cd\u30eb\u3001\u30de\u30c3\u30d7\u578bnil\u69cb\u9020\u4f53\u3001\u914d\u5217\u5404\u8981\u7d20\u304c\u305d\u306e\u30bc\u30ed\u5024<\/div>\n<\/div>\n
\u8303\u56f4<\/h3>\n
    \n
  • \n
      \u30d1\u30c3\u30b1\u30fc\u30b8<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          \u30d5\u30a1\u30a4\u30eb<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \n
          • \n
              \u30d6\u30ed\u30c3\u30af {}<\/ul>\n<\/li>\n<\/ul>\n
              if, for, switch
              \nswitch, select \u306e case\u7bc0<\/p>\n
              \u5b57\u9762\u4e0a\u7684\u610f\u601d<\/h2>\n
              1\r\n070 \/\/ 8\u9032\u6570\r\n0x10 \/\/ 16\u9032\u6570\r\n1.0\r\ntrue\r\nfalse\r\n\"foo\"\r\n`bar\\n`   raw string (\"bar\\\\n\"\u3068\u540c\u3058\u30a8\u30b9\u30b1\u30fc\u30d7\u6587\u5b57\u306e\u52b9\u679c\u304c\u306a\u3044)\r\n[]int{0,1,2}\r\nmap[string]int{\"a\": 1; \"b\": 2 } \r\nnil  \/\/ \u30dd\u30a4\u30f3\u30bf\u3001\u95a2\u6570\u3001\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3001\u30b9\u30e9\u30a4\u30b9\u3001\u30c1\u30e3\u30cd\u30eb\u3001\u30de\u30c3\u30d7\u578b\u306e\u30bc\u30ed\u5024\u3002\u30b9\u30e9\u30a4\u30b9\u306a\u3089\u7a7a\u306e\u5024(\u9577\u30550,\u5bb9\u91cf 0)\r\n<\/code><\/pre>\n
              \u6f14\u5458\u9635\u5bb9<\/h3>\n
              x := uint8(10)\r\n<\/code><\/pre>\n
              \u5217\u8868\u3001\u5207\u7247<\/h2>\n
              \u6570\u7ec4\u662f\u4e00\u4e2a\u5206\u914d\u4e86\u56fa\u5b9a\u5185\u5b58\u7a7a\u95f4\u7684\u533a\u57df
              \n\u5207\u7247\u662f\u5bf9\u6570\u7ec4\u7684\u90e8\u5206\u5f15\u7528<\/p>\n
              [n]T  \/\/ \u578b\u8868\u8a18: \u578bT\u306e\u914d\u5217\u3002\u9577\u3055n\r\n[]T   \/\/ \u578b\u8868\u8a18: \u578bT\u306e\u914d\u5217\u3092\u53c2\u7167\u3067\u304d\u308b\u30b9\u30e9\u30a4\u30b9\r\n\r\nvar p []int = []int{0,1,2,3} \/\/ int\u306e\u914d\u5217\u3092\u751f\u6210\u3057\u305d\u306e\u30b9\u30e9\u30a4\u30b9\u3092\u5b9a\u7fa9\r\n\r\np[2] => 2 \/\/ \u8981\u7d20\u53c2\u7167\r\n\r\n* \u914d\u5217\u306e\u7bc4\u56f2\u5916\u53c2\u7167\u306fruntime error\r\n* \u8ca0\u306e\u6570\u3067\u306e\u53c2\u7167\u3082runtime error (\u5373\u5024\u3067\u66f8\u3051\u3070\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc)\r\n\r\nlen(p) \/\/ => 4 \/\/ \u914d\u5217\u306e\u9577\u3055\r\ncap(p) \/\/ => 4 \/\/ \u914d\u5217\u306e\u5bb9\u91cf(capacity)=\u9577\u3055\r\n<\/code><\/pre>\n
              \/\/ \u30b9\u30e9\u30a4\u30b9\r\n\r\na := [4]int{0,1,2,3} \/\/ \u914d\u5217\u3092\u751f\u6210\r\n\r\na[lo: hi]  \/\/ \u914d\u5217\u307e\u305f\u306f\u30b9\u30e9\u30a4\u30b9a \u306e lo \u304b\u3089\u3001hi-1\u307e\u3067\u306e\u30b9\u30e9\u30a4\u30b9\u3092\u8fd4\u3059\r\n\r\n\u4ee5\u4e0b\u306f\u3044\u305a\u308c\u3082\u914d\u5217\u3068\u540c\u3058\u9577\u3055\u306e\u30b9\u30e9\u30a4\u30b9\u3092\u8fd4\u3057\u3001\u540c\u3058\u5185\u5bb9\u3092\u53c2\u7167\u3059\u308b\r\na[0:len(p)]\r\na[0:]\r\na[:len(p)]\r\na[:]\r\n\r\n\/\/ \u914d\u5217a\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9n\u304b\u3089\u9577\u3055len\u306e\u30b9\u30e9\u30a4\u30b9\r\na[n: n+len]\r\n<\/code><\/pre>\n
              a := [4]int{1,2,3,4}\r\ns := a[0:2]\r\n\r\nfmt.Println(s)       \/\/ [1 2]\r\nfmt.Println(len(s))  \/\/ => 2\r\nfmt.Println(cap(s))  \/\/ => 4\r\n\/\/ fmt.Println(s[2])    \/\/ => len\u3092\u8d85\u3048\u305f\u53c2\u7167\u306fcap\u5185\u3067\u3082runtime error\r\n\r\n\/\/ \u30b9\u30e9\u30a4\u30b9\u306f\u5143\u306e\u914d\u5217\u3068\u540c\u3058\u4f4d\u7f6e\u3092\u6307\u3057\u3066\u3044\u308b\r\ns[0] = 10\r\nfmt.Println(a) \/\/ [10 2 3 4]\r\nfmt.Println(s) \/\/ [10 2]\r\n\r\n\/\/ a\u306b\u5225\u306e\u914d\u5217\u3092\u4ee3\u5165\u3059\u308b\u3068\u30b9\u30e9\u30a4\u30b9\u3082\u5909\u308f\u308b(\u914d\u5217\u3078\u306e\u4ee3\u5165\u306f\u5168\u8981\u7d20\u306e\u30b3\u30d4\u30fc\u3001\u30b9\u30e9\u30a4\u30b9\u3078\u306e\u4ee3\u5165\u306f\u53c2\u7167\u5148\u306e\u5909\u66f4)\r\na = [4]int{2,4,6,8}\r\nfmt.Println(a) \/\/ => [2 4 6 8]\r\nfmt.Println(s) \/\/ => [2 4]\r\n<\/code><\/pre>\n
              \u5728\u4e0a\u8ff0\u7684\u4f8b\u5b50\u4e2d\uff0c\u5982\u679c\u5c06\u6570\u7ec4\u7c7b\u578b[4]int\uff08\u4e24\u5904\uff09\u8f6c\u6362\u4e3a\u5207\u7247\u7c7b\u578b[]int\uff0c\u5219\u6700\u540e\u7684\u7ed3\u679c\u4f1a\u53d1\u751f\u53d8\u5316\uff08\u4ecd\u4e3a[10 2]\uff09\u3002\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u6700\u597d\u4f7f\u7528\u5207\u7247\u7c7b\u578b[]int\u7684\u53d8\u91cf\uff0c\u800c\u4e0d\u662f\u4f7f\u7528\u660e\u786e\u7684\u6570\u7ec4\u7c7b\u578b[4]int\u3002<\/p>\n
              \u6b64\u5916\uff0c\u4f7f\u7528[…]int{1,2,3,4}\u548c”…”\uff0c\u53ef\u4ee5\u5728\u4e0d\u660e\u786e\u957f\u5ea6\u7684\u60c5\u51b5\u4e0b\u4e66\u5199\u6570\u7ec4\u7c7b\u578b\uff08\u76f8\u5f53\u4e8e\u5199\u4e0b\u6570\u7ec4\u7684\u957f\u5ea6\uff09\u3002<\/p>\n
              v := [...]int{1,2,3,4}\r\nfmt.Printf(\"%T\\n\", v)  \/\/ => [4]int\r\n<\/code><\/pre>\n
              a := [...]int{1,2,3,4}\r\ns := a[0:3]\r\nfmt.Println(a) \/\/ => [1 2 3 4]\r\nfmt.Println(s) \/\/ => [1 2 3]\r\n\r\n\/\/ \u30b9\u30e9\u30a4\u30b9\u306b\u8981\u7d20\u3092\u8ffd\u52a0\u3002cap\u5185\u306a\u3089\u65e2\u5b58\u306e\u8981\u7d20\u304c\u66f8\u304d\u63db\u308f\u308b\r\ns = append(s, 5)\r\nfmt.Println(a) \/\/ => [1 2 3 5]\r\nfmt.Println(s) \/\/ => [1 2 3 5]\r\n\r\n\/\/ \u30b9\u30e9\u30a4\u30b9\u306b\u8981\u7d20\u3092\u8ffd\u52a0\u3002cap\u3092\u8d85\u3048\u308b\u3068\u65b0\u305f\u306a\u914d\u5217\u304c\u751f\u6210\u3055\u308c\u308b\r\ns = append(s, 6)\r\nfmt.Println(a) \/\/ => [1 2 3 5]\r\nfmt.Println(s) \/\/ => [1 2 3 5 6]\r\n<\/code><\/pre>\n
              \/\/ \u751f\u6210\r\n\r\ns := make([]int, 5) \/\/ \u4e2d\u8eab\u306f0\u3067\u521d\u671f\u5316\r\ns := make([]int, 5, 100) capacity \u6307\u5b9a(\u9577\u3055100\u306e\u914d\u5217\u3092\u751f\u6210\u3057\u3001len=5\u3001cap=100\u306e\u30b9\u30e9\u30a4\u30b9\u3092\u8fd4\u3059)\r\ncap(s) \/\/ => 100\r\n<\/code><\/pre>\n
              \/\/ \u62e1\u5f35\/\u7e2e\u5c0f(re-slicing)\r\n\r\n\u30b9\u30e9\u30a4\u30b9\u6f14\u7b97\u3067\u3001cap\u4ee5\u4e0a\u306e\u62e1\u5f35\u306f\u3067\u304d\u306a\u3044\r\ns = s[:cap(b)]\r\n<\/code><\/pre>\n
              \u5730\u56fe<\/h2>\n
              \u7528\u5176\u4ed6\u8bed\u8a00\u8868\u793a\u5173\u8054\u6570\u7ec4\u3001\u54c8\u5e0c\u8868\u6216\u5b57\u5178<\/p>\n
              map[K]T   \/\/ \u578b\u8868\u8a18: \u578bT\u3092\u5024\u3001\u578bK\u3092\u30ad\u30fc\u3068\u3059\u308b\u30de\u30c3\u30d7\r\n\r\n\/\/ \u88dc\u8db3: map[K] \u306f\u3001T\u578b\u3067\u3042\u308b\u3068\u8aad\u3081\u308b\u3002go \u3067\u306f\u3001\u578b\u8868\u8a18\u304cC\u8a00\u8a9e\u306e\u3088\u3046\u306b\u898f\u5247\u7684\u3067\u3042\u308a\u3001\u304b\u3064\u9006\u5411\u304d\u306e\u305f\u3081C\u8a00\u8a9e\u307b\u3069\u8907\u96d1\u306b\u306a\u3089\u306a\u3044\u3002\r\n<\/code><\/pre>\n
              \/\/ \u751f\u6210\r\n\r\nfoo := make(map[\u30ad\u30fc\u306e\u578b]\u5024\u306e\u578b)\r\n\r\nfoo := map[string]uint32 {\r\n   \"a\": 1,\r\n   \"b\": 2,   \/\/ \u6700\u5f8c\u306e\u8981\u7d20\u306b\u4f59\u5206\u306a\u30ab\u30f3\u30de\u3092\u66f8\u3051\u308b\r\n}\r\n<\/code><\/pre>\n
              \/\/ \u53c2\u7167\r\nfoo[\"a\"]   \/\/ \u30ad\u30fc\u304c\u306a\u3051\u308c\u3070\u5024\u306e\u578b\u306e\u30bc\u30ed\u3092\u8fd4\u3059\r\n\r\n\/\/ \u30ad\u30fc\u306e\u6709\u7121\u78ba\u8a8d\u306f\u30012\u756a\u76ee\u306e\u623b\u308a\u5024\u3067\u5224\u65ad\u3059\u308b\r\nv, ok := foo[\"c\"]\r\nif ok == true {\r\n  \/\/ \u3042\u308a\r\n}\r\n<\/code><\/pre>\n
              \/\/ \u7f6e\u304d\u63db\u3048\r\nbar[\"b\"] = 2\r\n<\/code><\/pre>\n
              \/\/ \u524a\u9664\r\ndelete(foo, \"a\")\r\n<\/code><\/pre>\n
              \u8fd0\u7b97\u7b26<\/h2>\n
              \/\/ \u8ad6\u7406\u6f14\u7b97\u5b50\r\n\"||\"\r\n\"&&\"\r\n\"!\"\r\n\r\n\/\/ \u6bd4\u8f03\u6f14\u7b97\u5b50\r\n\"==\" | \"!=\" | \"<\" | \"<=\" | \">\" | \">=\"\r\n\r\n\/\/ \u7b97\u8853\u6f14\u7b97\u5b50\r\n\"+\" | \"-\" | \"*\" | \"\/\" | \"%\"\r\n\r\n\/\/ \u30d3\u30c3\u30c8\u6f14\u7b97\u5b50\r\n\"|\" | \"^\" | \"&\" | \"&^\"\r\n\"<<\" | \">>\"\r\n\r\n\/\/ \u30a2\u30c9\u30ec\u30b9\u6f14\u7b97\u5b50\r\n\"&\" | \"*\"\r\n\r\n\/\/ \u53d7\u4fe1\u6f14\u7b97\u5b50(channel\u304b\u3089\u5024\u3092\u53d6\u5f97)\r\n\"<-\"\r\n<\/code><\/pre>\n
              \u63a7\u5236\u7ed3\u6784<\/h2>\n
              \u53c9\u8def<\/h3>\n
              \u5982\u679c\u6709\u6587\u7ae0\u53ef\u4ee5\u8bfb<\/p>\n
              if<\/span> i<\/span> ><\/span> 0<\/span> {<\/span>\r\n\r\n}<\/span> else<\/span> if<\/span> i<\/span> <<\/span> 0<\/span> {<\/span>\r\n\r\n}<\/span> else<\/span> {<\/span>\r\n\r\n}<\/span>\r\n\r\n\/\/ else \u306e\u524d\u3067\u6539\u884c\u3059\u308b\u3068\u30a8\u30e9\u30fc(\u4ee5\u4e0b\u306fNG)<\/span>\r\nif<\/span> i<\/span> ><\/span> 0<\/span> {<\/span>\r\n}<\/span>\r\nelse<\/span> {<\/span>\r\n}<\/span>\r\n\r\n\/\/ \u5909\u6570\u5b9a\u7fa9\u4ed8(\u30b9\u30b3\u30fc\u30d7\u306fif\u306e\u6761\u4ef6\u5f0f\u3068\u30d6\u30ed\u30c3\u30af\u306e\u4e2d\u306e\u307f)<\/span>\r\nif<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> ><\/span> 0<\/span> {<\/span>\r\n\r\n}<\/span> else<\/span> if<\/span> i<\/span> <<\/span> 0<\/span> {<\/span>\r\n\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
              \u8f6c\u6362\u6587\u672c<\/p>\n
              \u5728switch\u8bed\u53e5\u4e2d\uff0c\u4e0d\u9700\u8981\u4f7f\u7528break\u6765\u9000\u51fa\u4e00\u4e2acase\u5757\u3002\u76f8\u53cd\uff0c\u5982\u679c\u8981\u6267\u884c\u4e0b\u4e00\u4e2acase\u5757\uff0c\u9700\u8981\u4f7f\u7528fallthrough\u3002\u4f7f\u7528\u9017\u53f7\u6765\u5c06\u591a\u4e2acase\u5757\u5408\u5e76\u5728\u4e00\u8d77\u3002\u5728case\u5757\u4e2d\u53ef\u4ee5\u4f7f\u7528\u4efb\u610f\u7684\u8868\u8fbe\u5f0f\u4f5c\u4e3a\u503c\u3002case\u8868\u8fbe\u5f0f\u4f1a\u6309\u7167\u4ece\u4e0a\u5230\u4e0b\u7684\u987a\u5e8f\u8fdb\u884c\u8bc4\u4f30\u3002<\/p>\n
              switch i := 0; i {\r\ncase 0:\r\ncase 1, 3:\r\n  fallthrough\r\ndefault:\r\n}\r\n\r\nswitch \u306e\u5f0f\u3092\u7701\u7565\u3059\u308b\u3068true\u306e\u610f\u5473\u306b\u306a\u308b\u3002\r\n\r\nswitch {\r\ncase i == 0:\r\ncase i == 1 || i == 3:\r\n  fallthrough\r\ndefault:\r\n}\r\n<\/code><\/pre>\n
              \u5207\u6362\u7c7b\u578b<\/p>\n
              \u5728\u5904\u7406\u52a8\u6001\u7c7b\u578b\u7684\u5206\u652f\u9009\u62e9\u4e2d\u4f7f\u7528\u7c7b\u578b\u5224\u65ad\u3002
              \n\u5728\u7c7b\u578b\u5224\u65ad\u8bed\u53e5\u4e2d\u65e0\u6cd5\u4f7f\u7528fallthrough\u3002<\/p>\n
              \/\/ \u578b interface{} \u306f\u3001\u4efb\u610f\u306e\u578b\u3092\u53d7\u3051\u4ed8\u3051\u308b(\u5f8c\u8ff0\u306einterface\u3092\u53c2\u7167)\r\nfunc foo(v interface{}) {\r\n  switch t := v.(type) { \/\/ \".(type)\" \u306f\u5e38\u306b\u3053\u3046\u66f8\u304f\r\n  case nil:\r\n     fmt.Printf(\"nil: %#v %T\\n\", t, t)\r\n  case bool:\r\n     fmt.Printf(\"bool: %#v %T\\n\", t, t)\r\n  case int:\r\n     fmt.Printf(\"int: %#v %T\\n\", t, t)\r\n  default:\r\n     fmt.Printf(\"default: %#v %T\\n\", t, t)\r\n  }\r\n}\r\n\r\nfoo(nil)  \/\/ => nil: <nil> <nil>\r\nfoo(1)    \/\/ => int: 1 int\r\nfoo(\"xx\") \/\/ => default: \"xx\" string\r\n<\/code><\/pre>\n
              \u5faa\u73af<\/h3>\n
              \/\/ for  \u30eb\u30fc\u30d7<\/span>\r\nfor<\/span> i<\/span>:=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> 10<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n\r\n}<\/span>\r\n\r\n\/\/ foreach \u30eb\u30fc\u30d7<\/span>\r\n\/\/ range \u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u3046(range \u306ffor\u3067\u306e\u307f\u4f7f\u7528\u3067\u304d\u308b\u69cb\u6587)<\/span>\r\n\r\nfor<\/span> i<\/span>,<\/span> v<\/span> :=<\/span> range<\/span> []<\/span>int<\/span>{<\/span>1<\/span>,<\/span>2<\/span>,<\/span>3<\/span>,<\/span>4<\/span>}<\/span> {<\/span>\r\n  fmt<\/span>.<\/span>Printf<\/span>(<\/span>\"%d, %d<\/span>\\n<\/span>\"<\/span>,<\/span> i<\/span>,<\/span> v<\/span>)<\/span>\r\n}<\/span>\r\n\r\n\/\/ while \u30eb\u30fc\u30d7<\/span>\r\ni<\/span> :=<\/span> 0<\/span>\r\nfor<\/span> ;<\/span> i<\/span> <<\/span> 10<\/span>;<\/span> {<\/span>\r\n\r\n  i<\/span>++<\/span>\r\n}<\/span>\r\n\r\ni<\/span> :=<\/span> 0<\/span>\r\nfor<\/span> i<\/span> <<\/span> 10<\/span> {<\/span>\r\n\r\n  i<\/span>++<\/span>\r\n}<\/span>\r\n\r\n\/\/ \u7121\u9650\u30eb\u30fc\u30d7<\/span>\r\n\r\nfor<\/span> {<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
              \u51fd\u6570 sh\u00f9)<\/h2>\n
              func(V)T   \/\/ \u578b\u8868\u8a18: \u578bT\u306e\u5024\u3092\u8fd4\u3059\u3001\u578bV\u3092\u5f15\u6570\u306b\u53d6\u308b\u95a2\u6570\r\n<\/code><\/pre>\n
              func<\/span> \u95a2\u6570\u540d<\/span>(<\/span>\u5f15\u6570<\/span>)<\/span> \u623b\u308a\u5024\u306e\u578b<\/span> {<\/span>\r\n  return<\/span> x<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              \u53ef\u4ee5\u8fd4\u56de\u591a\u4e2a\u8fd4\u56de\u503c\u3002<\/p>\n
              func<\/span> \u95a2\u6570\u540d<\/span>(<\/span>\u5f15\u6570<\/span>)<\/span> (<\/span>string<\/span>,<\/span> string<\/span>)<\/span> {<\/span>\r\n\r\n  return<\/span> x<\/span>,<\/span> y<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              \u5982\u679c\u5728\u8fd4\u56de\u7c7b\u578b\u4e0a\u5199\u4e0a\u53d8\u91cf\u540d\uff0c\u5c31\u4e0d\u9700\u8981\u5199return\u7684\u53c2\u6570\u4e86\uff08\u4e5f\u53ef\u4ee5\u5199return\u7684\u53c2\u6570\uff0c\u90a3\u4e2a\u503c\u4f1a\u88ab\u8fd4\u56de\uff09\u3002<\/p>\n
              func<\/span> \u95a2\u6570\u540d<\/span>(<\/span>\u5f15\u6570<\/span>)<\/span> (<\/span>x<\/span>,<\/span> y<\/span> string<\/span>)<\/span> {<\/span>\r\n\r\n  return<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              \u53d8\u91cf\u7684\u5b9a\u4e49\u91cd\u590d\uff0c\u65e0\u6cd5\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u4e66\u5199\uff08\u4f1a\u4ea7\u751f\u9519\u8bef\uff09\u3002<\/p>\n
              func<\/span> \u95a2\u6570\u540d<\/span>(<\/span>x<\/span>,<\/span> y<\/span> string<\/span>)<\/span> (<\/span>x<\/span>,<\/span> y<\/span> string<\/span>)<\/span> {<\/span>\r\n\r\n  return<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              \u95ed\u5305<\/h2>\n
              z<\/span> :=<\/span> 2<\/span>\r\nfoo<\/span> :=<\/span> func<\/span>(<\/span>x<\/span>,<\/span> y<\/span> int<\/span>)<\/span> int<\/span> {<\/span>\r\n  return<\/span> x<\/span>*<\/span>y<\/span>*<\/span>z<\/span>\r\n}<\/span>\r\n\r\nfor<\/span> i<\/span>,<\/span> v<\/span> :=<\/span> range<\/span> []<\/span>int<\/span>{<\/span>1<\/span>,<\/span>2<\/span>,<\/span>3<\/span>,<\/span>4<\/span>}<\/span> {<\/span>\r\n  fmt<\/span>.<\/span>Printf<\/span>(<\/span>\"%d * %d * %d = %d<\/span>\\n<\/span>\"<\/span>,<\/span> i<\/span>,<\/span> v<\/span>,<\/span> z<\/span>,<\/span> foo<\/span>(<\/span>i<\/span>,<\/span> v<\/span>))<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              func<\/span> foo<\/span>()<\/span> func<\/span>()<\/span>int<\/span> {<\/span>\r\n  z<\/span> :=<\/span> 1<\/span> \r\n  return<\/span> func<\/span>()<\/span> int<\/span> {<\/span>    \r\n    z<\/span>++<\/span>\r\n    return<\/span> z<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n  bar<\/span> :=<\/span> foo<\/span>()<\/span>\r\n  fmt<\/span>.<\/span>Println<\/span>(<\/span>bar<\/span>())<\/span> \/\/ => 2<\/span>\r\n  fmt<\/span>.<\/span>Println<\/span>(<\/span>bar<\/span>())<\/span> \/\/ => 3<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              \u7ed3\u6784\u4f53<\/h2>\n
              struct {T}   \/\/ \u578b\u8868\u8a18: \u578bT\u306e\u5024\u3092\u30e1\u30f3\u30d0\u30fc\u306b\u6301\u3064\u69cb\u9020\u4f53\r\n<\/code><\/pre>\n
              type<\/span> \u69cb\u9020\u4f53\u540d<\/span> struct<\/span> {<\/span>\r\n  X<\/span>,<\/span> Y<\/span> int<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              \/\/ \u5b9a\u7fa9(struct literal)<\/span>\r\n\r\nv<\/span> :=<\/span> \u69cb\u9020\u4f53\u540d<\/span>{<\/span>1<\/span>,<\/span> 2<\/span>}<\/span>\r\nv<\/span> :=<\/span> \u69cb\u9020\u4f53\u540d<\/span>{<\/span>x<\/span>:<\/span> 1<\/span>}<\/span> \/\/ y 0<\/span>\r\nv<\/span> :=<\/span> \u69cb\u9020\u4f53\u540d<\/span>{}<\/span>     \/\/ x, y => 0<\/span>\r\n<\/code><\/pre>\n
              \/\/ \u30e1\u30f3\u30d0\u53c2\u7167\r\n\r\nv.X\r\n<\/code><\/pre>\n
              \u6307\u9488<\/h2>\n
              \u6307\u9488\u662f\u6307\u5411C\u8bed\u8a00\u4e2d\u53d8\u91cf\u7684\u5bb9\u5668\u4f4d\u7f6e\u7684\u7c7b\u578b\uff0c\u4e0e\u5bf9\u8c61\u7684\u5f15\u7528\u4e0d\u540c\u3002\u6ca1\u6709\u7bad\u5934\u64cd\u4f5c\u7b26(->)\u3002<\/p>\n
              p := &v\r\np.X = 2\r\nfmt.Println(v.X) # => 2\r\n<\/code><\/pre>\n
              \u5982\u679c\u51fd\u6570\u7684\u53c2\u6570\u4e0d\u662f\u901a\u8fc7\u6307\u9488\u4f20\u9012\uff0c\u90a3\u4e48\u4f20\u9012\u7684\u5c06\u4f1a\u662f\u503c\u7684\u526f\u672c\uff0c\u4e0d\u4f1a\u5bf9\u8c03\u7528\u8005\u4ea7\u751f\u5f71\u54cd\u3002<\/p>\n
              type<\/span> T<\/span> struct<\/span> {<\/span>\r\n  X<\/span> int<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> foo<\/span>(<\/span>v<\/span> T<\/span>)<\/span> {<\/span>\r\n  v<\/span>.<\/span>X<\/span> =<\/span> 2<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n  v<\/span> :=<\/span> T<\/span>{<\/span>1<\/span>}<\/span>\r\n  foo<\/span>(<\/span>v<\/span>)<\/span>\r\n  fmt<\/span>.<\/span>Println<\/span>(<\/span>v<\/span>)<\/span>  \/\/ => {1}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              \u5728\u4e2d\u56fd\u7684\u672c\u5730\u5316\u662f\u201c\u5b9a\u4e49\u201d\u3002<\/p>\n
              foo(v *T)\r\n<\/code><\/pre>\n
              \u53ec\u5524<\/p>\n
              foo(&v)\r\n<\/code><\/pre>\n
              \u5982\u679c\u8fd9\u6837\u7684\u8bdd\uff0c\u4f1a\u8fd4\u56de{2}\u3002<\/p>\n
              \u65b0\u7684\u5185\u5b58\u5206\u914d<\/h3>\n
              \u5c06\u521d\u503c\u4e3a\u96f6\u7684T\u5206\u914d\u7ed9\u5185\u5b58\uff0c\u5e76\u8fd4\u56de\u8be5\u6307\u9488\u3002<\/p>\n
              var t *T = new(T)\r\n\u307e\u305f\u306f\u3001\r\nt := new(T)  # t \u306f\u3001T\u306e\u30dd\u30a4\u30f3\u30bf\u578b\r\n<\/code><\/pre>\n
              make() \u662f\u4e00\u4e2a\u7279\u6b8a\u7684\u5185\u5b58\u5206\u914d\u51fd\u6570\uff0c\u4e13\u7528\u4e8e\u5206\u914d\u5f15\u7528\u7c7b\u578b\u7684\u5207\u7247\u3001\u6620\u5c04\u548c\u901a\u9053\uff08\u8fd4\u56de\u5206\u914d\u7684\u5185\u90e8\u6570\u636e\u7ed3\u6784\u5e76\u4f5c\u4e3a\u5f15\u7528\u8fd4\u56de\uff09\u3002<\/p>\n
              \u65b9\u6cd5<\/h3>\n
              \/\/ \u5b9a\u7fa9\r\nfunc\u00a0(p *T)foo() int {\r\n    return p.X\r\n}\r\n\r\n\/\/ \u547c\u3073\u51fa\u3057(v\u306f\u3001T\u578b)\r\nv.foo()\r\n<\/code><\/pre>\n
              \u65e0\u6cd5\u5728\u5305\u5916\u7684\u7c7b\u578b\u6216\u57fa\u672c\u7c7b\u578b\u4e2d\u5b9a\u4e49\u65b9\u6cd5\u3002
              \n\u53ef\u4ee5\u5b9a\u4e49\u57fa\u4e8e\u57fa\u672c\u7c7b\u578b\u521b\u5efa\u7684\u7c7b\u578b\u7684\u65b9\u6cd5\u3002<\/p>\n
              type<\/span> MYINT<\/span> int<\/span>\r\n\r\nfunc<\/span>\u00a0<\/span>(<\/span>p<\/span> *<\/span>MYINT<\/span>)<\/span>foo<\/span>()<\/span> int<\/span> {<\/span>\r\n    return<\/span> p<\/span> *<\/span> 2<\/span>\r\n}<\/span>\r\n\r\nv<\/span> :=<\/span> MYINT<\/span>(<\/span>1<\/span>)<\/span>\r\nv<\/span>.<\/span>foo<\/span>()<\/span>\r\n<\/code><\/pre>\n
              \u754c\u9762<\/h2>\n
              \u5b9a\u4e49\u4e86\u4e00\u7cfb\u5217\u65b9\u6cd5\u7684\u7c7b\u578b<\/p>\n
              interface {\r\n  Foo() int\r\n  Bar() int\r\n}\r\n<\/code><\/pre>\n
              \u5177\u6709\u76f8\u540c\u65b9\u6cd5\u7684\u7c7b\u578b\u88ab\u8ba4\u4e3a\u662f\u5b9e\u73b0\u4e86\u8be5\u63a5\u53e3\u3002<\/p>\n
              package<\/span> main<\/span>\r\nimport<\/span> \"fmt\"<\/span>\r\n\r\ntype<\/span> I<\/span> interface<\/span> {<\/span>\r\n  Foo<\/span>()<\/span> int<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> T<\/span> struct<\/span> {<\/span>\r\n  X<\/span> int<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>p<\/span> T<\/span>)<\/span> Foo<\/span>()<\/span> int<\/span> {<\/span> \/\/ (p *T)\u3067\u306f\u3060\u3081<\/span>\r\n  return<\/span> p<\/span>.<\/span>X<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n  var<\/span> v<\/span> I<\/span>\r\n  v<\/span> =<\/span> T<\/span>{<\/span>1<\/span>}<\/span>  \/\/ interface I \u3068\u540c\u3058\u30e1\u30bd\u30c3\u30c9Foo()\u3092\u6301\u3064\u306e\u3067\u4ee3\u5165\u53ef\u80fd<\/span>\r\n  fmt<\/span>.<\/span>Println<\/span>(<\/span>v<\/span>.<\/span>Foo<\/span>())<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              \u5982\u679c\u65b9\u6cd5\u7684\u63a5\u6536\u5668\u7c7b\u578b\u662f\u6307\u9488\uff0c\u90a3\u4e48\u5c06\u5730\u5740\u8d4b\u503c\u7ed9\u63a5\u53e3\u7c7b\u578b\u7684\u53d8\u91cf\u3002<\/p>\n
              func (p *T) Foo() int { \/\/ (p *T)\r\n  return p.X\r\n}\r\n\r\nvar v I = &T{1}  \/\/ & \u3067\u30dd\u30a4\u30f3\u30bf\u3092\u4ee3\u5165\u3059\u308b\r\n<\/code><\/pre>\n
              \u5982\u679c\u65b9\u6cd5\u7684\u63a5\u6536\u5668\u7c7b\u578b\u662f\u503c\u7c7b\u578b\uff0c\u5219\u4e24\u79cd\u65b9\u5f0f\u90fd\u53ef\u4ee5\u3002<\/p>\n
              func (p T) Foo() int { \/\/ (p *T)\r\n  return p.X\r\n}\r\n\r\nvar v I = T{1}   \/\/ \u5024\u3082\u53ef\u80fd\r\nvar v I = &T{1}  \/\/ \u30dd\u30a4\u30f3\u30bf\u3082\u53ef\u80fd\r\n<\/code><\/pre>\n
              \u6240\u6709\u7c7b\u578b\u90fd\u88ab\u8ba4\u4e3a\u662f\u5b9e\u73b0\u4e86\u7a7a\u63a5\u53e3 interface {}\u3002<\/p>\n
              var v interface{}\r\nv = 1  \/\/ \u4f55\u3067\u3082\u4ee3\u5165\u53ef\u80fd\r\n\r\nvar n int\r\nn = v  \/\/ \u9006\u306fNG\r\n<\/code><\/pre>\n
              \u53ef\u4ee5\u901a\u8fc7\u5217\u4e3e\u63a5\u53e3\u7684\u7c7b\u578b\u540d\u79f0\u6765\u5f15\u7528\u8be5\u63a5\u53e3\uff0c\u4f46\u662f\u65e0\u6cd5\u4ee5\u9012\u5f52\u7684\u65b9\u5f0f\u5f15\u7528\u3002<\/p>\n
              type I1 interface {\r\n  Foo() int\r\n}\r\n\r\ntype I2 interface {\r\n  I1           \/\/ Foo() int \u3068\u66f8\u3044\u305f\u306e\u3068\u540c\u3058\r\n  Bar() int\r\n}\r\n<\/code><\/pre>\n
              \u5e76\u53d1<\/h2>\n
              \u534f\u7a0b\uff08go\uff09<\/p>\n
              \/\/ goroutine\u3092\u751f\u6210\u3057\u95a2\u6570foo()\u3092\u4e26\u884c\u306b\u5b9f\u884c\u3059\u308b\r\n\r\ngo foo(x, y, z)\r\n\r\n\/\/ \u7121\u540d\u306e\u95a2\u6570\u547c\u3073\u51fa\u3057\u3092\u4f7f\u3048\u3070\u3001\u95a2\u6570\u3092\u3042\u3089\u304b\u3058\u3081\u4f5c\u3089\u305a\u306b\u4e26\u5217\u51e6\u7406\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\r\ngo func(x int) {\r\n   fmt.Println(x)\r\n}(1)\r\n<\/code><\/pre>\n
              \u9891\u9053<\/p>\n
              chan T  \/\/ \u578b\u8868\u8a18: T\u578b\u3092\u9001\u53d7\u4fe1\u3059\u308b\u30c1\u30e3\u30cd\u30eb\r\n<\/code><\/pre>\n
              \/\/ \u751f\u6210\r\nch := make(chan int)\r\nch := make(chan int, 100)  \/\/ \u30d0\u30c3\u30d5\u30a1\u6570\u6307\u5b9a\r\n\r\n\/\/ \u9001\u4fe1\r\nch <- v  \/\/\u30d0\u30c3\u30d5\u30a1\u304c\u3044\u3063\u3071\u3044\u306a\u3089\u30d6\u30ed\u30c3\u30af\u3059\u308b\r\n\/\/ \u53d7\u4fe1\r\nv := <- ch \/\/ \u30c7\u30fc\u30bf\u304c\u306a\u3051\u308c\u3070\u30d6\u30ed\u30c3\u30af\u3059\u308b\r\n<\/code><\/pre>\n
              func<\/span> foo<\/span>(<\/span>c<\/span> chan<\/span> int<\/span>)<\/span> {<\/span> c<\/span> <-<\/span> 1<\/span> }<\/span>\r\nfunc<\/span> bar<\/span>(<\/span>c<\/span> chan<\/span> int<\/span>)<\/span> {<\/span> c<\/span> <-<\/span> 2<\/span> }<\/span>\r\n\r\nc<\/span> :=<\/span> make<\/span>(<\/span>chan<\/span> int<\/span>)<\/span>\r\n\r\ngo<\/span> foo<\/span>(<\/span>c<\/span>)<\/span>\r\ngo<\/span> bar<\/span>(<\/span>c<\/span>)<\/span>\r\nx<\/span>,<\/span> y<\/span> :=<\/span> <-<\/span> c<\/span>,<\/span> <-<\/span> c<\/span>  \/\/ x, y \u306f\u30011, 2 \u307e\u305f\u306f\u30012, 1 \u304c\u8fd4\u308b<\/span>\r\n\r\n\/\/ chan\u306f\u53c2\u7167\u578b\u306e\u305f\u3081\u30dd\u30a4\u30f3\u30bf\u6e21\u3057\u3059\u308b\u5fc5\u8981\u306f\u306a\u3044<\/span>\r\n<\/code><\/pre>\n
              \u5173\u95ed\u9891\u9053<\/p>\n
              close(ch)\r\n<\/code><\/pre>\n
              \u5173\u95ed\u7531\u53d1\u9001\u65b9\u6267\u884c\u3002<\/p>\n
              \u5728\u6c49\u8bed\u4e2d\u91cd\u65b0\u8868\u8ff0\u5982\u4e0b\uff1a\u503e\u542c\u8005\u901a\u8fc7\u7b2c\u4e8c\u4e2a\u8fd4\u56de\u503c\u6765\u5224\u65ad\u662f\u5426\u6709\u8f93\u5165\uff08\u662f\u5426\u88ab\u5173\u95ed\uff09\u3002<\/p>\n
              v, ok := <-ch\r\nif ok == true {\r\n  \/\/ \u3042\u308b\r\n}\r\n<\/code><\/pre>\n
              \u76f4\u5230\u8f93\u5165\u88ab\u5173\u95ed\u4e3a\u6b62\uff0c\u5faa\u73af\u7ee7\u7eed\u3002<\/p>\n
              for i := range ch {\r\n\r\n}\r\n<\/code><\/pre>\n
              \u539f\u53e5\uff1a\u6211\u559c\u6b22\u53bb\u6d77\u8fb9\u6563\u6b65\uff0c\u611f\u53d7\u6d77\u98ce\u548c\u9633\u5149\u3002
              \nParaphrased: \u6211\u4eab\u53d7\u6563\u6b65\u4e8e\u6d77\u8fb9\uff0c\u611f\u53d7\u6d77\u98ce\u548c\u9633\u5149\u7684\u6ecb\u6da6\u3002<\/p>\n
              func<\/span> foo<\/span>(<\/span>c<\/span> chan<\/span> int<\/span>)<\/span> {<\/span>\r\n  for<\/span> _<\/span>,<\/span> v<\/span> :=<\/span> range<\/span> []<\/span>int<\/span>{<\/span>1<\/span>,<\/span>2<\/span>,<\/span>3<\/span>}<\/span> {<\/span>\r\n      fmt<\/span>.<\/span>Println<\/span>(<\/span>v<\/span>)<\/span>\r\n      c<\/span> <-<\/span> v<\/span>\r\n  }<\/span>\r\n  close<\/span>(<\/span>c<\/span>)<\/span>\r\n}<\/span>\r\n\r\nc<\/span> :=<\/span> make<\/span>(<\/span>chan<\/span> int<\/span>)<\/span>\r\ngo<\/span> foo<\/span>(<\/span>c<\/span>)<\/span>\r\nfor<\/span> i<\/span> :=<\/span> range<\/span> c<\/span> {<\/span>\r\n  fmt<\/span>.<\/span>Println<\/span>(<\/span>i<\/span> *<\/span> 10<\/span>)<\/span>\r\n}<\/span>\r\n\/\/ \u9806\u756a\u306f\u4fdd\u8a3c\u3055\u308c\u306a\u3044<\/span>\r\n1<\/span>\r\n10<\/span>\r\n2<\/span>\r\n20<\/span>\r\n3<\/span>\r\n30<\/span>\r\n<\/code><\/pre>\n
              \/\/ \u4e26\u5217\u51e6\u7406\u306e\u5b8c\u4e86\u5f85\u3061\u5408\u308f\u305b\u3092\u7c21\u5358\u306b\u66f8\u304f\u30b5\u30f3\u30d7\u30eb<\/span>\r\n\r\npackage<\/span> main<\/span>\r\nimport<\/span> \"fmt\"<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n  c<\/span> :=<\/span> make<\/span>(<\/span>chan<\/span> bool<\/span>)<\/span>\r\n\r\n  go<\/span> func<\/span>()<\/span> {<\/span>\r\n     \/\/ \u4f55\u304b\u9577\u3044\u51e6\u7406<\/span>\r\n     fmt<\/span>.<\/span>Println<\/span>(<\/span>\"goroutine\"<\/span>)<\/span>\r\n     c<\/span> <-<\/span> true<\/span> \/\/ \u30af\u30ed\u30fc\u30b8\u30e3\u306a\u306e\u3067\u5916\u5074\u306echannel\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<\/span>\r\n  }()<\/span>\r\n\r\n  \/\/ \u30e1\u30a4\u30f3\u306e\u51e6\u7406<\/span>\r\n\r\n  <-<\/span> c<\/span> \/\/ \u5f85\u3061\u5408\u308f\u305b<\/span>\r\n  fmt<\/span>.<\/span>Println<\/span>(<\/span>\"finish\"<\/span>)<\/span>\r\n}<\/span> \r\n<\/code><\/pre>\n
              \u9009\u62e9\u8be5\u6587<\/h3>\n
              \u540c\u65f6\u7b49\u5f85\u6765\u81ea\u591a\u4e2a\u901a\u9053\u7684\u63a5\u6536\u3002\u53ea\u5904\u7406\u5148\u5230\u8fbe\u6570\u636e\u7684\u901a\u9053\u3002
              \n\u5982\u679c\u5728\u6267\u884cselect\u65f6\u5df2\u7ecf\u6536\u5230\u591a\u4e2a\u6570\u636e\uff0c\u5219\u968f\u673a\u5904\u7406\u5176\u4e2d\u4e00\u4e2acase\u3002<\/p>\n
              \u5982\u679c\u9ed8\u8ba4\u503c\u88ab\u6307\u5b9a\u4e14\u6570\u636e\u672a\u9001\u8fbe\u65f6\uff0c\u4e0d\u4f1a\u963b\u585e\u800c\u662f\u6267\u884c\u9ed8\u8ba4\u5904\u7406\u3002<\/p>\n
              select {\r\ncase v <- ch1:\r\n  fmt.Println(v)\r\ncase v <- ch2:\r\n  fmt.Println(v)\r\ndefault:\r\n  fmt.Println(\"nothing\")\r\n}\r\n<\/code><\/pre>\n
              \u8f93\u5165”\u6587”<\/h2>\n
              type\u662f\u7d66\u578b\u5225\u53d6\u5225\u540d\u7684\u6587\u6cd5\u3002\u5225\u540d\u7684\u578b\u5225\u8207\u539f\u672c\u7684\u578b\u5225\u662f\u6709\u5340\u5225\u7684\u3002<\/p>\n
              type<\/span> X<\/span> struct<\/span> {<\/span>\r\n    X<\/span> int<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> foo<\/span>()<\/span> struct<\/span>{<\/span>int<\/span>}<\/span> {<\/span>\r\n  x<\/span> :=<\/span> struct<\/span> {<\/span>int<\/span>}{<\/span>1<\/span>}<\/span>\r\n  y<\/span> :=<\/span> X<\/span>{<\/span>1<\/span>}<\/span>\r\n\r\n  \/\/ return y \u306fng\u3001 return x \u306fok<\/span>\r\n  return<\/span> y<\/span>   \/\/ cannot use y (type X) as type struct { int } in return argument<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              \u5176\u4ed6<\/h2>\n
              \u65f6\u95f4<\/h3>\n
              \u76ee\u524d\u7684\u65f6\u95f4<\/p>\n
              import<\/span> \"time\"<\/span>\r\n\r\ntime<\/span>.<\/span>Now<\/span>()<\/span>\r\n<\/code><\/pre>\n
              \u7761\u89c9 (Shu\u00ec<\/h3>\n
              import<\/span> \"time\"<\/span>\r\n\r\ntime<\/span>.<\/span>Sleep<\/span>(<\/span>ns<\/span>)<\/span>  \/\/ ns \u306f\u3001\u30ca\u30ce\u79d2<\/span>\r\ntime<\/span>.<\/span>Sleep<\/span>(<\/span>1<\/span>*<\/span>time<\/span>.<\/span>Second<\/span>)<\/span>  \/\/ 1\u79d2\u30b9\u30ea\u30fc\u30d7<\/span>\r\n<\/code><\/pre>\n
              \u6587\u5b57\u4e32\u64cd\u4f5c\uff08\u5206\u5272\u3001\u9023\u63a5\uff09<\/h3>\n
              import . \"strings\"\r\n\r\ns := []string{\"abc\", \"def\", \"ghi\"}\r\n\r\nv := Join(s, \",\")\r\nfmt.Printf(\"%#v\\n\", v) \/\/ => \"abc,def,ghi\"\r\n\r\nx := Split(v, \",\")\r\nfmt.Printf(\"%#v\\n\", x) \/\/ => []string{\"abc\", \"def\", \"ghi\"}\r\n\r\nx = SplitN(v, \",\", 2)\r\nfmt.Printf(\"%#v\\n\", x) \/\/ => []string{\"abc\", \"def,ghi\"}\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
              \u9010\u6e10\u589e\u52a0\u8bb0\u5f55\u7684\u81ea\u5df1\u5b66\u4e60\u5185\u5bb9\u3002 Go\u4e4b\u65c5\uff08\u82f1\u6587\uff09\u8bf7\u5148\u9605\u8bfbA Tour of Go\uff08\u65e5\u6587\uff09 \u4ee5\u4e0b\u5185\u5bb9\u4e5f\u5fc5\u987b\u9605\u8bfb\uff1a  […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44078","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nGolang \u5feb\u901f\u53c2\u8003\u624b\u518c - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/golang-\u5feb\u901f\u53c2\u8003\u624b\u518c\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Golang \u5feb\u901f\u53c2\u8003\u624b\u518c\" \/>\n<meta property=\"og:description\" content=\"\u9010\u6e10\u589e\u52a0\u8bb0\u5f55\u7684\u81ea\u5df1\u5b66\u4e60\u5185\u5bb9\u3002 Go\u4e4b\u65c5\uff08\u82f1\u6587\uff09\u8bf7\u5148\u9605\u8bfbA Tour of Go\uff08\u65e5\u6587\uff09 \u4ee5\u4e0b\u5185\u5bb9\u4e5f\u5fc5\u987b\u9605\u8bfb\uff1a […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/golang-\u5feb\u901f\u53c2\u8003\u624b\u518c\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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