{"id":50750,"date":"2024-12-03T11:01:05","date_gmt":"2024-12-03T03:01:05","guid":{"rendered":"https:\/\/fwq.ai\/blog\/50750\/"},"modified":"2024-12-03T11:01:05","modified_gmt":"2024-12-03T03:01:05","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-reduce-%e5%87%bd%e6%95%b0%e5%90%88%e5%b9%b6%e6%95%b0%e7%bb%84%e4%b8%ad%e8%bf%9e%e7%bb%ad%e7%9b%b8%e5%90%8c%e9%a1%b9%ef%bc%8c%e5%b9%b6%e7%94%9f%e6%88%90%e5%8c%85","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/50750\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 reduce \u51fd\u6570\u5408\u5e76\u6570\u7ec4\u4e2d\u8fde\u7eed\u76f8\u540c\u9879\uff0c\u5e76\u751f\u6210\u5305\u542b\u5408\u5e76\u540e\u7684\u8fde\u7eed\u9879\u7684\u65b0\u6570\u7ec4\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u4f7f\u7528 reduce \u51fd\u6570\u5408\u5e76\u6570\u7ec4\u4e2d\u8fde\u7eed\u76f8\u540c\u9879\uff0c\u5e76\u751f\u6210\u5305\u542b\u5408\u5e76\u540e\u7684\u8fde\u7eed\u9879\u7684\u65b0\u6570\u7ec4\uff1f<\/h1>\n

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\"\u5982\u4f55\u4f7f\u7528<\/p>\n

\u5408\u5e76\u76f8\u540c\u8fde\u7eed\u9879<\/strong><\/p>\n

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\u7b97\u6cd5\u6b65\u9aa4\uff1a<\/strong><\/p>\n

    \n
  1. \u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61 obj\uff0c\u7528\u4e8e\u5b58\u50a8\u5408\u5e76\u7684\u8fde\u7eed\u9879\u3002<\/li>\n
  2. \n

    \u4f7f\u7528 reduce \u8fed\u4ee3\u8f93\u5165\u6570\u7ec4\uff0c\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n

      \n
    • \n

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        \n
      • \u83b7\u53d6\u5f53\u524d\u5143\u7d20\u7684\u7d22\u5f15 index \u548c\u540e\u7eed\u5143\u7d20 next\u3002<\/li>\n
      • \u5982\u679c\u540e\u7eed\u5143\u7d20\u5b58\u5728\uff0c\u4e14\u5176 start \u503c\u7b49\u4e8e\u5f53\u524d\u5143\u7d20\u7684 end \u503c\uff0c\u5219\u7ee7\u7eed\u8fed\u4ee3\u5e76\u4ece\u540e\u7eed\u5143\u7d20\u7684 content \u4e2d\u5220\u9664\u5f53\u524d\u5143\u7d20\u3002<\/li>\n
      • \u6839\u636e\u5f53\u524d\u5143\u7d20\u7684 start \u548c end \u503c\u8ba1\u7b97\u952e key\u3002<\/li>\n
      • \u5982\u679c obj \u4e2d\u4e0d\u5b58\u5728 key\uff0c\u5219\u5c06\u5f53\u524d\u5143\u7d20\u6dfb\u52a0\u5230 obj \u4e2d\uff0c\u5e76\u521b\u5efa\u5305\u542b\u4e00\u4e2a content \u5143\u7d20\u7684\u65b0\u5bf9\u8c61\u3002<\/li>\n
      • \u5982\u679c key \u5df2\u5b58\u5728\uff0c\u5219\u5c06\u5f53\u524d\u5143\u7d20\u7684 content \u6dfb\u52a0\u5230\u73b0\u6709\u5bf9\u8c61\u7684 content \u4e2d\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
      • \u5c06 obj \u4e2d\u7684\u503c\u8f6c\u6362\u4e3a\u4e00\u4e2a\u5305\u542b\u5408\u5e76\u540e\u8fde\u7eed\u9879\u7684\u65b0\u6570\u7ec4 list\u3002<\/li>\n<\/ol>\n

        \u793a\u4f8b\u4ee3\u7801\uff1a<\/strong><\/p>\n

        let arr = [\n    { \"start\": 1, \"end\": 2, \"content\": [ \"a\", \"b\", \"e\" ] },\n    { \"start\": 2, \"end\": 3, \"content\": [ \"b\", \"c\" ] },\n    { \"start\": 3, \"end\": 4, \"content\": [ \"b\", \"d\" ] },\n    { \"start\": 4, \"end\": 5, \"content\": [ \"d\" ] },\n    { \"start\": 7, \"end\": 8, \"content\": [ \"b\" ] },\n    { \"start\": 9, \"end\": 11, \"content\": [ \"b\", \"c\" ] }\n];\n\nlet obj = {};\nlet list = arr.reduce((list, item, index, arr) => {\n    item.content.foreach(citem => {\n        let i = index;\n        let next, cindex;\n        while ((next = arr[i + 1]) && arr[i].end === next.start && (cindex = next.content.indexof(citem)) >= 0) {\n            i++;\n            next.content.splice(cindex, 1);\n        }\n        let end = arr[i].end;\n        let key = item.start + '-' + end;\n        if(!obj[key]){\n            list.push(obj[key] = {\n                start: item.start,\n                end,\n                content: [citem]\n            });\n        }else{\n            obj[key].content.push(citem);\n        }\n    });\n    return list;\n}, []);\n\nconsole.log(list);<\/pre>\n
        \u8f93\u51fa\uff1a<\/strong><\/p>\n
        [\n    { \"start\": 1, \"end\": 2, \"content\": [ \"A\", \"E\" ] },\n    { \"start\": 1, \"end\": 4, \"content\": [ \"B\" ] },\n    { \"start\": 2, \"end\": 3, \"content\": [ \"C\" ] },\n    { \"start\": 3, \"end\": 5, \"content\": [ \"D\" ] },\n    { \"start\": 7, \"end\": 8, \"content\": [ \"B\" ] },\n    { \"start\": 9, \"end\": 11, \"content\": [ \"B\", \"C\" ] }\n]<\/pre>\n
        \u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u5982\u4f55\u4f7f\u7528 reduce \u51fd\u6570\u5408\u5e76\u6570\u7ec4\u4e2d\u8fde\u7eed\u76f8\u540c\u9879\uff0c\u5e76\u751f\u6210\u5305\u542b\u5408\u5e76\u540e\u7684\u8fde\u7eed\u9879\u7684\u65b0\u6570\u7ec4\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
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