{"id":18551,"date":"2024-11-19T19:57:59","date_gmt":"2024-11-19T11:57:59","guid":{"rendered":"https:\/\/fwq.ai\/blog\/?p=18551"},"modified":"2024-11-19T19:57:59","modified_gmt":"2024-11-19T11:57:59","slug":"go%e6%96%b0%e6%89%8b%e9%9c%80%e6%b3%a8%e6%84%8f%e7%9a%84%e7%9f%a5%e8%af%86%e7%82%b9%e4%b8%80","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/18551\/","title":{"rendered":"Go\u65b0\u624b\u9700\u6ce8\u610f\u7684\u77e5\u8bc6\u70b9(\u4e00)"},"content":{"rendered":"

\u5b66\u4e60Go\u7684\u4e00\u4e9b\u9700\u8981\u6ce8\u610f\u7684\u77e5\u8bc6\u70b9\u3002<\/p>\n

 <\/p>\n

\u4e00\u3001GO\u4e2d\u7684\u5305<\/strong><\/h3>\n

1\u3001<\/strong>\u8fd9\u4e2a\u662fGO\u4e2d\u975e\u5e38\u57fa\u7840\uff0c\u5305\u4f7f\u7528package\u5b9a\u4e49\uff0c\u4f7f\u7528import\u5bfc\u5165\uff0c\u53ef\u4ee5\u7406\u89e3PHP\u4e2d\u7684\u7c7b\uff0c\u4f7f\u7528\u81ea\u52a8\u52a0\u8f7d\uff0c\u6240\u4ee5\u5305\u540d\u79f0\u548c\u8def\u5f84\u540d\u79f0\u5fc5\u9700\u4e00\u81f4\uff0c\u4e14\u5305\u540d\u79f0\u5fc5\u9700\u5c0f\u5199<\/strong><\/p>\n

2\u3001<\/strong>\u5305\u4e2d\u7684\u5e38\u91cf\u3001\u53d8\u91cf\u3001\u51fd\u6570\u7684\u9996\u5b57\u6bcd\uff0c\u8868\u793a\u5305\u5916\u5e38\u91cf\u3001\u5305\u5916\u53d8\u91cf\u3001\u5305\u5916\u65b9\u6cd5\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3apublic\uff0c\u53ef\u4ee5\u5728\u53e6\u4e00\u4e2a\u5305\u4e2d\u4f7f\u7528\u3002\u5982\u679c\u9996\u5b57\u6bcd\u5c0f\u5199\uff0c\u8868\u793a\u5305\u5185\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3aprivate\uff0c\u4ec5\u53ef\u4ee5\u5728\u540c\u4e00\u4e2a\u5305\u5185\u90e8\u4f7f\u7528\u3002<\/p>\n

3\u3001<\/strong>\u56e0\u4e3a\u4e00\u4e2a\u76ee\u5f55\u5373\u8868\u793a\u4e00\u4e2a\u5305\uff0c\u6240\u4ee5\u540c\u4e00\u4e2a\u76ee\u5f55\u4e0b\u7684\u5305\u540d\u79f0\u5fc5\u9700\u4e00\u81f4<\/p>\n

4\u3001<\/strong>\u4f60\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u5305\u7684\u522b\u540d\u6765\u89e3\u51b3\u5305\u540d\u4e4b\u95f4\u7684\u540d\u79f0\u51b2\u7a81\u3002<\/p>\n

\u4e8c\u3001\u53d8\u91cf<\/strong><\/h3>\n

1\u3001<\/strong>\u4f7f\u7528\u5173\u952e\u5b57var\u58f0\u660e\uff0c\u683c\u5f0f var identifier type<\/p>\n

2\u3001<\/strong>type\u7684\u7c7b\u578b\u6709\uff1a<\/p>\n

    \n
  • string\uff1a\u5b57\u7b26\u4e32\uff0cGo\u8bed\u8a00\u7684\u5b57\u7b26\u4e32\u7684\u5b57\u8282\u4f7f\u7528UTF-8\u7f16\u7801\u6807\u8bc6Unicode\u6587\u672c<\/li>\n
  • bool\uff1atrue \/ false<\/li>\n
  • int\u7cfb\u5217\uff1a\u5305\u62ecint\u3001int8\u3001int16\u3001int32\u3001int64\u3001uint\u3001uint8\u3001uint16\u3001uint32\u3001uint64
    \nint\uff1a32\u4f4d\u621664\u4f4d\uff0c\u548c\u64cd\u4f5c\u7cfb\u7edf\u6709\u5173\u3002
    \nint8\uff1a2\u76847\u6b21\u65b9\uff0c-128\u5230127
    \nint16\uff1a2\u768415\u6b21\u65b9\uff0c-32768\u523032767
    \nint32\uff1a2\u768431\u6b21\u65b9\uff0c-2147483648 \u5230 2147483647
    \nint64\uff1a2\u768463\u6b21\u65b9\uff0c-9223372036854775808 \u5230 9223372036854775807
    \nuint\uff1a32\u4f4d\u621664\u4f4d\uff0c\u548c\u64cd\u4f5c\u7cfb\u7edf\u6709\u5173\u3002
    \nuint8\uff1a2\u76848\u6b21\u65b9\uff0c0 \u5230 255
    \nint16\uff1a2\u768416\u6b21\u65b9\uff0c0 \u5230 65535
    \nint32\uff1a2\u768432\u6b21\u65b9\uff0c0 \u5230 4294967295
    \nint64\uff1a2\u768464\u6b21\u65b9\uff0c0 \u5230 18446744073709551615<\/li>\n
  • \u6d6e\u70b9\u7cfb\u5217\uff1afloat32\u3001float64\u3001complex64\u3001complex128
    \nfloat32\uff1aIEEE-754 32\u4f4d\u6d6e\u70b9\u578b\u6570
    \nfloat64\uff1aIEEE-754 64\u4f4d\u6d6e\u70b9\u578b\u6570
    \ncomplex64\uff1a32 \u4f4d\u5b9e\u6570\u548c\u865a\u6570
    \ncomplex128\uff1a64 \u4f4d\u5b9e\u6570\u548c\u865a\u6570<\/li>\n
  • \u5176\u5b83\u7c7b\u578b\uff1abyte\u3001rune\u3001uintptr
    \nbyte\uff1a\u7c7b\u4f3c uint8
    \nrune\uff1a\u7c7b\u4f3c int32
    \nuintptr\uff1a\u65e0\u7b26\u53f7\u6574\u578b\uff0c\u7528\u4e8e\u5b58\u653e\u4e00\u4e2a\u6307\u9488<\/li>\n
  • \u6d3e\u751f\u7c7b\u578b\uff1a\u6307\u9488\u7c7b\u578b\uff08Pointer\uff09\u3001\u6570\u7ec4\u7c7b\u578b\u3001\u7ed3\u6784\u5316\u7c7b\u578b(struct)\u3001Channel \u7c7b\u578b\u3001\u51fd\u6570\u7c7b\u578b\u3001\u5207\u7247\u7c7b\u578b
    \n\u3001\u63a5\u53e3\u7c7b\u578b\uff08interface\uff09\u3001Map \u7c7b\u578b<\/li>\n<\/ul>\n

    \u4e09\u3001\u8fd0\u7b97\u7b26<\/strong><\/h3>\n

    1\u3001<\/strong>GO\u662f\u5f3a\u7c7b\u578b\u8bed\u8a00\uff0c\u4e0d\u540c\u7c7b\u578b\u7684\u503c\u8fdb\u884c\u4e8c\u5143\u8fd0\u7b97\uff0c\u65e0\u6cd5\u901a\u8fc7\u7f16\u8bd1\u3002<\/p>\n

    2\u3001<\/strong>Go \u5bf9\u4e8e\u503c\u4e4b\u95f4\u7684\u6bd4\u8f83\u6709\u975e\u5e38\u4e25\u683c\u7684\u9650\u5236\uff0c\u53ea\u6709\u4e24\u4e2a\u7c7b\u578b\u76f8\u540c\u7684\u503c\u624d\u53ef\u4ee5\u8fdb\u884c\u6bd4\u8f83\uff0c\u5047\u5982 a == b\uff0c\u6b64\u65f6a\u3001b\u7684\u7c7b\u578b\u4e5f\u5fc5\u9700\u4e00\u81f4\uff0c\u5426\u5219\uff0c\u65e0\u6cd5\u901a\u8fc7\u7f16\u8bd1\u3002<\/p>\n

    \u56db\u3001\u65f6\u95f4<\/strong><\/h3>\n

    1\u3001<\/strong>\u7279\u522b\u6ce8\u610f\uff1a\u5728go\u4e2d\u7684\u65e5\u671fformat\u683c\u5f0f\uff0c\u4f7f\u75282006\u4ee3\u8868\u5e74\uff0c01\u4ee3\u8868\u6708\uff0c02\u4ee3\u8868\u65e5\uff0c03\u4ee3\u8868\u5c0f\u65f6\u300104\u4ee3\u8868\u5206\u300105\u4ee3\u8868\u79d2\u3002<\/p>\n

    2\u3001<\/strong>\u83b7\u53d6\u5f53\u524d\u65f6\u95f4\u6233\uff0ctime.Now().Unix()
    \n\u83b7\u53d6\u6307\u5b9a\u65f6\u95f4\u7684\u65f6\u95f4\u6233\uff1a
    \ntm1, _ := time.Parse(\u201c2006-01-02 03:04:05\u2033, \u201c2018-01-01 01:01:01\u2033)
    \nfmt.Println(tm1.Unix())
    \nmt.Println(tm1.Format(\u201c2006-01-02 03:04:05\u2033))<\/p>\n

    \u4e94\u3001\u63a7\u5236\u7ed3\u6784<\/strong><\/h3>\n

    1\u3001<\/strong>Go \u5b8c\u5168\u7701\u7565\u4e86 if\u3001switch \u548c for \u7ed3\u6784\u4e2d\u6761\u4ef6\u8bed\u53e5\u4e24\u4fa7\u7684\u62ec\u53f7\uff0c\u76f8\u6bd4 Java\u3001C++ \u548c C# \u4e2d\u51cf\u5c11\u4e86\u5f88\u591a\u89c6\u89c9\u6df7\u4e71\u7684\u56e0\u7d20\uff0c\u540c\u65f6\u4e5f\u4f7f\u4f60\u7684\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u3002<\/p>\n

    2\u3001<\/strong>switch\u7684\u96c6\u4e2d\u683c\u5f0f\uff1a<\/p>\n

    switch var1 {\r\n\u00a0\u00a0 \u00a0case val1:\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0...\r\n\u00a0\u00a0 \u00a0case val2:\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0...\r\n\u00a0\u00a0 \u00a0default:\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0...\r\n}<\/pre>\n
    switch {\r\n\u00a0\u00a0 \u00a0case condition1:\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0...\r\n\u00a0\u00a0 \u00a0case condition2:\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0...\r\n\u00a0\u00a0 \u00a0default:\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0...\r\n}<\/pre>\n
    switch initialization {\r\n\u00a0\u00a0 \u00a0case val1:\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0...\r\n\u00a0\u00a0 \u00a0case val2:\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0...\r\n\u00a0\u00a0 \u00a0default:\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0...\r\n}<\/pre>\n
    \u516d\u3001\u51fd\u6570<\/strong><\/h3>\n
    1\u3001<\/strong>\u51fd\u6570\u4e2d\u53ef\u4ee5\u6ca1\u6709\u5f62\u53c2\uff0c\u4f46\u5fc5\u9700\u8981\u6709\u5f62\u53c2\u7684\u7c7b\u578b\uff0c\u4f8b\u5982\uff1afunc f1(int, string) (string){return\u00a0 \u201ca\u201d }<\/p>\n
    2\u3001<\/strong>\u51fd\u6570\u4e2d\u5982\u679c\u6709\u6709\u591a\u4e2a\u5206\u652f\uff0c\u5219\u6bcf\u4e2a\u5206\u652f\u90fd\u5fc5\u9700\u6709return\uff0c\u4f8b\u5982\uff1aif else \u5219\u5fc5\u9700\u67092\u4e2areturn \u5173\u952e\u5b57\u3002<\/p>\n
    3\u3001<\/strong>\u7406\u89e3\u51fd\u6570\u975e\u547d\u540d\u8fd4\u56de\u503c\u548c\u547d\u540d\u8fd4\u56de\u503c\uff0c\u5c3d\u91cf\u4f7f\u7528\u547d\u540d\u8fd4\u56de\u503c\uff1a\u4f1a\u4f7f\u4ee3\u7801\u66f4\u6e05\u6670\u3001\u66f4\u7b80\u77ed\uff0c\u540c\u65f6\u66f4\u52a0\u5bb9\u6613\u8bfb\u61c2\u3002<\/p>\n
    4\u3001<\/strong>defer\u51fd\u6570\u7684\u7528\u6cd5<\/p>\n
    5\u3001<\/strong>\u95ed\u5305\u51fd\u6570\u7684\u7528\u6cd5\uff0c\u770b\u4e0b\u9762\u7684\u4f8b\u5b50<\/p>\n
    func Connect() {\r\n\u00a0\u00a0\u00a0 start := time.Now() \u00a0\r\n\u00a0\u00a0\u00a0 p2 := add()\r\n\u00a0\u00a0\u00a0 fmt.Println(p2(2))\r\n\u00a0\u00a0\u00a0 p3 := adder(20)\r\n\u00a0\u00a0\u00a0 fmt.Println(p3(30))\r\n\u00a0\u00a0\u00a0 fmt.Println(p3(60))\r\n\u00a0\u00a0\u00a0 fmt.Println(p3(10))\r\n\u00a0\u00a0\u00a0 elapsed := time.Since(start)\r\n\u00a0\u00a0\u00a0 fmt.Println(elapsed)\r\n}\r\nfunc add() (func(arg int) int) {\r\n\u00a0\u00a0\u00a0 return func(b int)(rst int) {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 rst = b + 1\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return\r\n\u00a0\u00a0\u00a0 }\r\n}\r\nfunc adder(arg int) (func(arg int) int) {\r\n\u00a0\u00a0\u00a0 return func (a int) (rst int) {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 arg += a\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return arg\r\n\u00a0\u00a0\u00a0 }\r\n}<\/pre>\n
    \u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n
    3\r\n50\r\n110\r\n120\r\n26.697\u00b5s<\/pre>\n
    \u5229\u7528\u95ed\u5305\u51fd\u6570(\u5176\u5b9e\u8fd9\u91cc\u4f7f\u7528\u4e86\u5de5\u5382\u51fd\u6570)\u9ad8\u6548\u5b9e\u73b0\u6590\u6ce2\u90a3\u5951\u6570\u5217\uff0c\u76f8\u6bd4\u9012\u5f52\u5b9e\u73b0\u6027\u80fd\u9ad8\u51fa\u4f55\u6b62\u5343\u500d\u3002<\/p>\n
    func Connect() {\r\n\u00a0\u00a0\u00a0 start := time.Now() \u00a0\r\n\u00a0\u00a0\u00a0 add(10) \r\n\u00a0\u00a0\u00a0 elapsed := time.Since(start)\r\n\u00a0\u00a0\u00a0 fmt.Println(elapsed)\r\n}\r\nfunc add(a int) {\r\n\u00a0\u00a0\u00a0 f := adder();\r\n\u00a0\u00a0\u00a0 for i := 1; i <= a; i++ {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 fmt.Println(f(i))\r\n\u00a0\u00a0\u00a0 } \r\n}\r\nfunc adder() (func(a int) int) {\r\n\u00a0\u00a0\u00a0 pre1, pre2 := 0,0\r\n\u00a0\u00a0\u00a0 return func(a int) (rst int) {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if a <= 1 {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 pre1, rst = 1,1\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 } else {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 rst = pre1 +\u00a0 pre2 \r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 pre2 = pre1\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 pre1 = rst \r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return\r\n\u00a0\u00a0\u00a0 }\r\n}<\/pre>\n
    \u00a06\u3001<\/strong>\u5de5\u5382\u51fd\u6570\uff1a\u4e00\u4e2a\u8fd4\u56de\u503c\u4e3a\u53e6\u4e00\u4e2a\u51fd\u6570\u7684\u51fd\u6570\u53ef\u4ee5\u88ab\u79f0\u4e4b\u4e3a\u5de5\u5382\u51fd\u6570\uff0c\u8fd9\u5728\u60a8\u9700\u8981\u521b\u5efa\u4e00\u7cfb\u5217\u76f8\u4f3c\u7684\u51fd\u6570\u7684\u65f6\u5019\u975e\u5e38\u6709\u7528\uff1a\u4e66\u5199\u4e00\u4e2a\u5de5\u5382\u51fd\u6570\u800c\u4e0d\u662f\u9488\u5bf9\u6bcf\u79cd\u60c5\u51b5\u90fd\u4e66\u5199\u4e00\u4e2a\u51fd\u6570\u3002\u4e0b\u9762\u7684\u51fd\u6570\u6f14\u793a\u4e86\u5982\u4f55\u52a8\u6001\u8fd4\u56de\u8ffd\u52a0\u540e\u7f00\u7684\u51fd\u6570\u3002<\/p>\n
    \u4e3e\u4f8b\u8bf4\u660e\uff1a<\/p>\n
    func Connect() {\r\n\u00a0\u00a0\u00a0 start := time.Now() \u00a0\r\n\u00a0\u00a0\u00a0 addBmp := makeAddSuffix(\".bmp\")\r\n\u00a0\u00a0\u00a0 addPng := makeAddSuffix(\".png\")\r\n\u00a0\u00a0\u00a0 fmt.Println(addBmp(\"header\"))\r\n\u00a0\u00a0\u00a0 fmt.Println(addPng(\"banner\"))\r\n\u00a0\u00a0\u00a0 elapsed := time.Since(start)\r\n\u00a0\u00a0\u00a0 fmt.Println(elapsed)\r\n}\r\nfunc makeAddSuffix(suffix string) (func(file string) string) {\r\n\u00a0\u00a0\u00a0 return func(file string) string {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return file + suffix \r\n\u00a0\u00a0\u00a0 }\r\n}<\/pre>\n
    7\u3001<\/strong>\u8ba1\u7b97\u4ee3\u7801\u6267\u884c\u65f6\u95f4<\/p>\n
    start := time.Now()\r\n.........\r\nend := time.Now()\r\ndelta := end.Sub(start)<\/pre>\n
    start := time.Now()\r\n..........\r\nelapsed := time.Since(start)\r\nfmt.Println(elapsed)<\/pre>\n","protected":false},"excerpt":{"rendered":"
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