{"id":32054,"date":"2023-11-21T20:47:36","date_gmt":"2023-11-30T19:28:03","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%a8node-js%e7%bc%96%e5%86%99%e7%b1%bb%e4%bc%bcbash%e7%9a%84split%e5%91%bd%e4%bb%a4%e7%9a%84%e5%a4%84%e7%90%86\/"},"modified":"2024-05-04T10:10:27","modified_gmt":"2024-05-04T02:10:27","slug":"%e7%94%a8node-js%e7%bc%96%e5%86%99%e7%b1%bb%e4%bc%bcbash%e7%9a%84split%e5%91%bd%e4%bb%a4%e7%9a%84%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%a8node-js%e7%bc%96%e5%86%99%e7%b1%bb%e4%bc%bcbash%e7%9a%84split%e5%91%bd%e4%bb%a4%e7%9a%84%e5%a4%84%e7%90%86\/","title":{"rendered":"\u7528Node.js\u7f16\u5199\u7c7b\u4f3cBash\u7684split\u547d\u4ee4\u7684\u5904\u7406"},"content":{"rendered":"<h2>\u9996\u5148<\/h2>\n<p>\u5728\u5904\u7406Node.js\u4e2d\u7684\u5927\u6587\u4ef6\u65f6\uff0c\u6211\u5e0c\u671b\u80fd\u50cfbash\u7684split\u547d\u4ee4\u4e00\u6837\uff0c\u5c06\u6587\u4ef6\u6309\u884c\u5206\u5272\uff0c\u6240\u4ee5\u6211\u521b\u5efa\u4e86\u8fd9\u4e2a\u4f5c\u4e3a\u5907\u5fd8\u5f55\u7559\u4e0b\u7684\u5de5\u5177\u3002<br \/>\n\u5b83\u7ed3\u5408\u4e86Bash\u547d\u4ee4\u548c\u9009\u9879\uff0c\u6240\u4ee5\u53ef\u4ee5\u50cf\u5728Bash\u4e2d\u4e00\u6837\u4f7f\u7528\u5b83\u662f\u5173\u952e\u70b9\u3002<\/p>\n<h2>\u63d0\u4f9b\u4ee5\u4e0b\u7684\u4e2d\u6587\u7684\u540c\u4e49\u77ed\u8bed\uff0c\u53ea\u9700\u4e00\u79cd\u9009\u62e9\uff1a<\/h2>\n<p>\u4ee3\u7801<\/p>\n<h3>bash\u7684split\u547d\u4ee4<\/h3>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span><span class=\"nb\">split<\/span> <span class=\"o\">[<\/span>OPTION]... <span class=\"o\">[<\/span>FILE <span class=\"o\">[<\/span>PREFIX]]\r\n<\/code><\/pre>\n<h4>\u9009\u9879\uff08\u90e8\u5206\uff09<\/h4>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">-l, &#8211;lines=NUMBER<\/ul>\n<\/li>\n<\/ul>\n<p>\u5206\u5272\u3059\u308b\u30d5\u30a1\u30a4\u30eb\u306e\u884c\u5358\u4f4d<\/p>\n<p>-d, &#8211;numeric-suffixes<\/p>\n<p>\u6307\u5b9a\u3042\u308a: [PREFIX000, PREFIX001, PREFIX002&#8230;]<br \/>\n\u6307\u5b9a\u306a\u3057: [PREFIXaaa, PREFIXaab, PREFIXaac&#8230;]<\/p>\n<p>-a, &#8211;suffix-length=N<\/p>\n<p>\u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u306b\u4ed8\u52a0\u3059\u308b\u6587\u5b57\u5217\u306e\u9577\u3055<\/p>\n<h3>\u7528Node.js\u7684\u7248\u672c<\/h3>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">fs<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">require<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">fs<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">readline<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">require<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">readline<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"kd\">function<\/span> <span class=\"nx\">createAlphabetSuffix<\/span><span class=\"p\">(<\/span><span class=\"nx\">num<\/span><span class=\"p\">,<\/span> <span class=\"nx\">length<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n\r\n    <span class=\"kd\">let<\/span> <span class=\"nx\">i<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">num<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"kd\">let<\/span> <span class=\"nx\">str<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">''<\/span><span class=\"p\">;<\/span>\r\n\r\n    <span class=\"k\">while<\/span> <span class=\"p\">(<\/span><span class=\"nx\">i<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">0<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nx\">str<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">String<\/span><span class=\"p\">.<\/span><span class=\"nx\">fromCharCode<\/span><span class=\"p\">(<\/span><span class=\"mi\">97<\/span> <span class=\"o\">+<\/span> <span class=\"p\">(<\/span><span class=\"nx\">i<\/span> <span class=\"o\">%<\/span> <span class=\"mi\">26<\/span><span class=\"p\">))<\/span> <span class=\"o\">+<\/span> <span class=\"nx\">str<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"nx\">i<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">Math<\/span><span class=\"p\">.<\/span><span class=\"nx\">floor<\/span><span class=\"p\">(<\/span><span class=\"nx\">i<\/span> <span class=\"o\">\/<\/span> <span class=\"mi\">26<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">return<\/span> <span class=\"nx\">str<\/span><span class=\"p\">.<\/span><span class=\"nx\">padStart<\/span><span class=\"p\">(<\/span><span class=\"nx\">length<\/span><span class=\"p\">,<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">a<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"kd\">function<\/span> <span class=\"nx\">createNumericSuffix<\/span><span class=\"p\">(<\/span><span class=\"nx\">num<\/span><span class=\"p\">,<\/span> <span class=\"nx\">length<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nb\">String<\/span><span class=\"p\">(<\/span><span class=\"nx\">num<\/span><span class=\"p\">).<\/span><span class=\"nx\">padStart<\/span><span class=\"p\">(<\/span><span class=\"nx\">length<\/span><span class=\"p\">,<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">0<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nx\">module<\/span><span class=\"p\">.<\/span><span class=\"nx\">exports<\/span> <span class=\"o\">=<\/span> <span class=\"kd\">function<\/span> <span class=\"nx\">split<\/span><span class=\"p\">(<\/span><span class=\"nx\">file<\/span><span class=\"p\">,<\/span> <span class=\"nx\">options<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{})<\/span> <span class=\"p\">{<\/span>\r\n\r\n    <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nb\">Promise<\/span><span class=\"p\">((<\/span><span class=\"nx\">resolve<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\r\n        <span class=\"kd\">let<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"nx\">prefix<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">x<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"nx\">lines<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"nx\">suffixLength<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">3<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"nx\">numericSuffixes<\/span> <span class=\"o\">=<\/span> <span class=\"kc\">false<\/span>\r\n        <span class=\"p\">}<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">options<\/span><span class=\"p\">;<\/span>\r\n\r\n        <span class=\"kd\">const<\/span> <span class=\"nx\">rs<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">fs<\/span><span class=\"p\">.<\/span><span class=\"nx\">createReadStream<\/span><span class=\"p\">(<\/span><span class=\"nx\">file<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"kd\">const<\/span> <span class=\"nx\">rl<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">readline<\/span><span class=\"p\">.<\/span><span class=\"nx\">createInterface<\/span><span class=\"p\">(<\/span><span class=\"nx\">rs<\/span><span class=\"p\">);<\/span>\r\n\r\n        <span class=\"kd\">let<\/span> <span class=\"nx\">index<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"kd\">let<\/span> <span class=\"nx\">ws<\/span><span class=\"p\">;<\/span>\r\n\r\n        <span class=\"nx\">rl<\/span><span class=\"p\">.<\/span><span class=\"nx\">on<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">line<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"p\">(<\/span><span class=\"nx\">line<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\r\n            <span class=\"kd\">let<\/span> <span class=\"nx\">i<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">index<\/span><span class=\"o\">++<\/span><span class=\"p\">;<\/span>\r\n\r\n            <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nx\">i<\/span> <span class=\"o\">%<\/span> <span class=\"nx\">lines<\/span> <span class=\"o\">===<\/span> <span class=\"mi\">0<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n\r\n                <span class=\"nx\">ws<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"nx\">ws<\/span><span class=\"p\">.<\/span><span class=\"nx\">close<\/span><span class=\"p\">();<\/span>\r\n\r\n                <span class=\"kd\">const<\/span> <span class=\"nx\">suffixIndex<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">Math<\/span><span class=\"p\">.<\/span><span class=\"nx\">floor<\/span><span class=\"p\">(<\/span><span class=\"nx\">i<\/span> <span class=\"o\">\/<\/span> <span class=\"nx\">lines<\/span><span class=\"p\">);<\/span>\r\n                <span class=\"kd\">const<\/span> <span class=\"nx\">suffix<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">numericSuffixes<\/span>\r\n                    <span class=\"p\">?<\/span> <span class=\"nx\">createNumericSuffix<\/span><span class=\"p\">(<\/span><span class=\"nx\">suffixIndex<\/span><span class=\"p\">,<\/span> <span class=\"nx\">suffixLength<\/span><span class=\"p\">)<\/span>\r\n                    <span class=\"p\">:<\/span> <span class=\"nx\">createAlphabetSuffix<\/span><span class=\"p\">(<\/span><span class=\"nx\">suffixIndex<\/span><span class=\"p\">,<\/span> <span class=\"nx\">suffixLength<\/span><span class=\"p\">);<\/span>\r\n\r\n                <span class=\"nx\">ws<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">fs<\/span><span class=\"p\">.<\/span><span class=\"nx\">createWriteStream<\/span><span class=\"p\">(<\/span><span class=\"s2\">`<\/span><span class=\"p\">${<\/span><span class=\"nx\">prefix<\/span><span class=\"p\">}${<\/span><span class=\"nx\">suffix<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">);<\/span>\r\n\r\n            <span class=\"p\">}<\/span>\r\n\r\n            <span class=\"nx\">ws<\/span><span class=\"p\">.<\/span><span class=\"nx\">write<\/span><span class=\"p\">(<\/span><span class=\"nx\">line<\/span> <span class=\"o\">+<\/span> <span class=\"dl\">'<\/span><span class=\"se\">\\n<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n\r\n        <span class=\"p\">});<\/span>\r\n\r\n        <span class=\"nx\">rl<\/span><span class=\"p\">.<\/span><span class=\"nx\">on<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">close<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"nx\">ws<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"nx\">ws<\/span><span class=\"p\">.<\/span><span class=\"nx\">close<\/span><span class=\"p\">();<\/span>\r\n            <span class=\"nx\">resolve<\/span><span class=\"p\">();<\/span>\r\n        <span class=\"p\">});<\/span>\r\n\r\n    <span class=\"p\">});<\/span>\r\n\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<h4>\u5728\u4e2d\u6587\u4e2d\u8fdb\u884c\u540c\u4e49\u6539\u8ff0\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8868\u8fbe\u65b9\u5f0f:<br \/>\n&#8211; \u9009\u62e9<br \/>\n&#8211; \u9009\u9879<br \/>\n&#8211; \u4efb\u9009<br \/>\n&#8211; \u53ef\u9009\u9879<br \/>\n&#8211; \u65b9\u6848<\/h4>\n<div>\n<div class=\"post-table\">\u30aa\u30d7\u30b7\u30e7\u30f3\u521d\u671f\u5024\u8aac\u660eprefixx\u51fa\u529b\u3059\u308b\u30d5\u30a1\u30a4\u30eb\u306e\u30d9\u30fc\u30b9\u540dlines100\u51fa\u529b\u3059\u308b\u30d5\u30a1\u30a4\u30eb\u306e\u884c\u6570suffixLength3\u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u306b\u4ed8\u4e0e\u3059\u308b\u6587\u5b57\u5217\u306e\u9577\u3055numericSuffixesfalse\u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u306b\u4ed8\u4e0e\u3059\u308b\u6587\u5b57\u5217\u3092\u6570\u5024\u306b\u3059\u308b\u304b<\/div>\n<\/div>\n<h4>\u6837\u672c<\/h4>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">split<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">require<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">.\/split<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"p\">(<\/span><span class=\"k\">async<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\r\n    <span class=\"k\">await<\/span> <span class=\"nx\">split<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">.\/largeFile.txt<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"na\">prefix<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">smallFile<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"na\">lines<\/span><span class=\"p\">:<\/span> <span class=\"mi\">10<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"na\">suffixLength<\/span><span class=\"p\">:<\/span> <span class=\"mi\">4<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"na\">numericSuffixes<\/span><span class=\"p\">:<\/span> <span class=\"kc\">true<\/span>\r\n    <span class=\"p\">});<\/span>\r\n\r\n<span class=\"p\">})();<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>node useSplit.js\r\n<span class=\"nv\">$ <\/span><span class=\"nb\">ls<\/span> | <span class=\"nb\">grep <\/span>smallFile\r\n<span class=\"c\"># smallFile0000<\/span>\r\n<span class=\"c\"># smallFile0001<\/span>\r\n<span class=\"c\"># smallFile0002<\/span>\r\n<span class=\"c\"># ...<\/span>\r\n<\/code><\/pre>\n<h2>\u6700\u540e<\/h2>\n<p>\u5982\u679c\u5c3d\u7ba1\u610f\u5916\u5730\u627e\u4e0d\u5230\uff0c\u90a3\u6211\u5c31\u8bd5\u7740\u81ea\u5df1\u52a8\u624b\u505a\u4e86\u3002<br \/>\n\u5982\u679c\u8fd8\u6709\u5176\u4ed6\u66f4\u597d\u7684\u65b9\u6cd5\uff0c\u8bf7\u6307\u51fa\u6765\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u5728\u5904\u7406Node.js\u4e2d\u7684\u5927\u6587\u4ef6\u65f6\uff0c\u6211\u5e0c\u671b\u80fd\u50cfbash\u7684split\u547d\u4ee4\u4e00\u6837\uff0c\u5c06\u6587\u4ef6\u6309\u884c\u5206\u5272\uff0c\u6240\u4ee5\u6211\u521b\u5efa\u4e86\u8fd9 [&hellip;]<\/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-32054","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>\u7528Node.js\u7f16\u5199\u7c7b\u4f3cBash\u7684split\u547d\u4ee4\u7684\u5904\u7406 - 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\/\u7528node-js\u7f16\u5199\u7c7b\u4f3cbash\u7684split\u547d\u4ee4\u7684\u5904\u7406\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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