{"id":42385,"date":"2024-12-01T13:56:42","date_gmt":"2024-12-01T05:56:42","guid":{"rendered":"https:\/\/fwq.ai\/blog\/42385\/"},"modified":"2024-12-01T13:56:42","modified_gmt":"2024-12-01T05:56:42","slug":"go-%e4%b8%ad%e7%9a%84%e5%a4%9a%e8%a1%8c%e7%bc%93%e5%86%b2%e8%af%bb%e5%8f%96","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/42385\/","title":{"rendered":"Go \u4e2d\u7684\u591a\u884c\u7f13\u51b2\u8bfb\u53d6"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Go \u4e2d\u7684\u591a\u884c\u7f13\u51b2\u8bfb\u53d6<\/span><\/p>\n

Go \u4e2d\u7684\u591a\u884c\u7f13\u51b2\u8bfb\u53d6<\/h1>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-23 18:54:27<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4f60\u5728\u5b66\u4e60Golang<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587\u300aGo \u4e2d\u7684\u591a\u884c\u7f13\u51b2\u8bfb\u53d6\u300b<\/span>\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230<\/span>\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u6b63\u5728\u5c1d\u8bd5\u4ee5\u7f13\u51b2\u65b9\u5f0f\u8bfb\u53d6\u6587\u4ef6\uff0c\u56e0\u4e3a\u6211\u6709\u975e\u5e38\u5927\u7684\u6587\u4ef6\u3002\u6211\u60f3\u5bf9\u6587\u4ef6\u5e94\u7528\u4e00\u4e9b\u6587\u672c\u66ff\u6362\u3002\u5047\u8bbe\u6bcf\u6b21\u8bfb\u53d6\u65f6\u6211\u90fd\u4f1a\u641c\u7d22\u5355\u8bcd\u201cfoo\u201d\u5e76\u5c06\u5176\u66ff\u6362\u4e3a\u5176\u4ed6\u5355\u8bcd\u201cbar\u201d\u3002\u5982\u679c\u6211\u4f7f\u7528\u5927\u5c0f\u4e3a 5mb \u7684\u7f13\u51b2\u533a\u8fdb\u884c\u8bfb\u53d6\uff0c\u90a3\u4e48 foo \u53ef\u80fd\u4f1a\u5206\u6210\u4e24\u6b21\u8bfb\u53d6\uff0c\u4e00\u6b21\u8bfb\u53d6\u201cfo\u201d\uff0c\u53e6\u4e00\u4e2a\u8bfb\u53d6\u201co\u201d\uff0c\u7136\u540e\u6211\u5c06\u65e0\u6cd5\u627e\u5230\u8be5\u5355\u8bcd\u3002\u6709\u6ca1\u6709\u529e\u6cd5\u8ba9\u6211\u53ef\u4ee5\u4f7f\u7528\u7f13\u51b2\u8bfb\u53d6\u76f4\u5230\u6700\u540e\u4e00\u4e2a\u6362\u884c\u7b26\u6216\u8005\u53ef\u4ee5\u5728\u7f13\u51b2\u533a\u4e2d\u8bfb\u53d6\u591a\u884c \u6211\u5728\u4e0b\u9762\u505a\u4e86\u3002\u4f46\u5b83\u4e0d\u4f1a\u8bfb\u5230\u4e0b\u4e00\u884c\u6216\u4e0a\u4e00\u884c<\/p>\n

file, err := os.Open(filename)\nif err != nil {\n    panic(err)\n}\ndefer file.Close()\n\nbyteSlice := make([]byte, 5*1024*1024) \/\/ read 5 MB\nbufioreader := bufio.NewReaderSize(file, bufferSize)\n\nfor {\n    n, err := bufioreader.Read(byteSlice)\n    if n > 0 {\n        fmt.Println(byteSlice[:n])\n    } else if err == io.EOF {\n        break\n    } else {\n        panic(err)\n    }\n}<\/pre>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u7531\u4e8e\u60a8\u4f7f\u7528\u7684\u662f bufio \u8bfb\u53d6\u5668\uff0c\u56e0\u6b64\u60a8\u5b9e\u9645\u4e0a\u4e0d\u5e94\u8be5\u81ea\u5df1\u5c06\u8f93\u5165\u4e0e\u7f13\u51b2\u533a\u8fb9\u754c\u5bf9\u9f50\u3002\u4f7f\u7528\u9ad8\u7ea7\u8bfb\u53d6\u51fd\u6570\u4e4b\u4e00\uff0c\u4f8b\u5982\u201cbufioreader.readstring(‘\\n’)\u201d\uff0c\u5b83\u5c06\u4f7f\u7528\u5e95\u5c42\u7f13\u51b2\u533a\u8bfb\u53d6\u4e00\u884c\uff0c\u5e76\u4e14\u60a8\u4e0d\u5fc5\u81ea\u5df1\u5904\u7406\u884c\u5206\u9694\u7b26\u3002<\/p>\n
\u5982\u679c\u60a8\u6709\u81ea\u5df1\u7684\u7f13\u51b2\u533a\uff0c\u5219\u4e0d\u9700\u8981 bufio reader\u3002\u901a\u8fc7\u60a8\u7684\u4ee3\u7801\uff0c\u60a8\u5c06\u83b7\u5f97\u4ece bufio \u7f13\u51b2\u533a\u5230 byteslice \u7684\u65e0\u7528\u6570\u636e\u526f\u672c\u3002 <\/p>\n
\u5173\u4e8e\u5206\u5272\u201cfoo\u201d\u95ee\u9898\uff0c\u89e3\u51b3\u65b9\u6848\u662f\u5728\u4e0b\u6b21\u8bfb\u53d6\u4e4b\u524d\u5c06\u7f13\u51b2\u533a\u7684\u6700\u540e2\u4e2a\u5b57\u7b26\u79fb\u5230\u524d\u9762\u3002 <\/p>\n
\u66f4\u51c6\u786e\u5730\u8bf4\uff0c\u5982\u679c\u8981\u66ff\u6362\u7684\u5355\u8bcd\u957f\u5ea6\u4e3am<\/em>\uff0c\u5219\u5c06\u7f13\u51b2\u533a\u7684m-1<\/em>\u4e2a\u6700\u540e\u5b57\u6bcd\u590d\u5236\u5230\u7f13\u51b2\u533a\u7684\u524d\u9762\uff0c\u586b\u5145\u5269\u4f59\u90e8\u5206\u7684\u7f13\u51b2\u533a\u5e76\u5728\u7f13\u51b2\u533a\u4e2d\u641c\u7d22\u8981\u66ff\u6362\u7684\u5355\u8bcd\u3002 <\/p>\n
\/\/ assume we want to find word\n\nfile, err := os.Open(filename)\nif err != nil {\n    panic(err)\n}\ndefer file.Close()\n\ntrailingLen := len(word)-1\ndataLen := 5*1024*1024 + trailingLen\ndata := make([]byte, dataLen) \/\/ read 5 MB\n\nfor {\n    n, err := file.Read(data[trailingLen:])\n    if err != nil {\n        if err == io.EOF {\n            break\n        }\n        panic(err)\n    }\n    \/\/ search and replace word in data[:n]\n\n    if n == dataLen {\n        copy(data, data[dataLen-trailingLen:])\n    }\n}\n<\/pre>\n
\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300aGo \u4e2d\u7684\u591a\u884c\u7f13\u51b2\u8bfb\u53d6\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > > > Go \u4e2d\u7684\u591a\u884c\u7f13\u51b2\u8bfb\u53d6 Go \u4e2d\u7684\u591a\u884c\u7f13\u51b2\u8bfb\u53d6 \u6765\u6e90\uff1astackoverflow 2024-04-23 18:54:27 0\u6d4f\u89c8 \u6536\u85cf \u4f60\u5728\u5b66\u4e60Golang\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587\u300aGo \u4e2d\u7684\u591a\u884c\u7f13\u51b2\u8bfb\u53d6\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01 \u95ee\u9898\u5185\u5bb9 \u6211\u6b63\u5728\u5c1d\u8bd5\u4ee5\u7f13\u51b2\u65b9\u5f0f\u8bfb\u53d6\u6587\u4ef6\uff0c\u56e0\u4e3a\u6211\u6709\u975e\u5e38\u5927\u7684\u6587\u4ef6\u3002\u6211\u60f3\u5bf9\u6587\u4ef6\u5e94\u7528\u4e00\u4e9b\u6587\u672c\u66ff\u6362\u3002\u5047\u8bbe\u6bcf\u6b21\u8bfb\u53d6\u65f6\u6211\u90fd\u4f1a\u641c\u7d22\u5355\u8bcd\u201cfoo\u201d\u5e76\u5c06\u5176\u66ff\u6362\u4e3a\u5176\u4ed6\u5355\u8bcd\u201cbar\u201d\u3002\u5982\u679c\u6211\u4f7f\u7528\u5927\u5c0f\u4e3a 5mb \u7684\u7f13\u51b2\u533a\u8fdb\u884c\u8bfb\u53d6\uff0c\u90a3\u4e48 foo \u53ef\u80fd\u4f1a\u5206\u6210\u4e24\u6b21\u8bfb\u53d6\uff0c\u4e00\u6b21\u8bfb\u53d6\u201cfo\u201d\uff0c\u53e6\u4e00\u4e2a\u8bfb\u53d6\u201co\u201d\uff0c\u7136\u540e\u6211\u5c06\u65e0\u6cd5\u627e\u5230\u8be5\u5355\u8bcd\u3002\u6709\u6ca1\u6709\u529e\u6cd5\u8ba9\u6211\u53ef\u4ee5\u4f7f\u7528\u7f13\u51b2\u8bfb\u53d6\u76f4\u5230\u6700\u540e\u4e00\u4e2a\u6362\u884c\u7b26\u6216\u8005\u53ef\u4ee5\u5728\u7f13\u51b2\u533a\u4e2d\u8bfb\u53d6\u591a\u884c \u6211\u5728\u4e0b\u9762\u505a\u4e86\u3002\u4f46\u5b83\u4e0d\u4f1a\u8bfb\u5230\u4e0b\u4e00\u884c\u6216\u4e0a\u4e00\u884c file, err := os.Open(filename) if err != nil { panic(err) } defer file.Close() byteSlice := make([]byte, 5*1024*1024) \/\/ read 5 MB bufioreader := bufio.NewReaderSize(file, bufferSize) for { n, err := bufioreader.Read(byteSlice) if […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-42385","post","type-post","status-publish","format-standard","hentry","category-docker"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/42385","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=42385"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/42385\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=42385"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=42385"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=42385"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}