Node.js 将数组另存为任何格式的输出文件

我需要帮助了解如何保存数组的输出。我已尝试将输出附加到csv，但这会为数组中的每个项目提供一个空csv或一个附加有单词[object]的csv

以下是我的数组中的输出示例：

{
      date: '2014-01-25',
      firstBoxerRating: [Array],
      firstBoxerWeight: 235.5,
      judges: [Array],
      links: [Object],
      location: 'Golden Nugget Casino, Atlantic City',
      metadata: '<a href="/en/judge/401833">Joseph Pasquale</a> 75-77 | <a href="/en/judge/401066">Tony Perez</a> 78-74 | <a href="/en/judge/401734">Barbara Perez</a> 78-74\n' +
        '<br>',
      numberOfRounds: [Array],
      outcome: 'win',
      rating: 20,
      referee: [Object],
      result: [Array],
      secondBoxer: [Object],
      secondBoxerLast6: [Array],
      secondBoxerRating: [Array],
      secondBoxerRecord: [Object],
      secondBoxerWeight: 236.5,
      titles: []
    },
    {
      date: '2014-05-16',
      firstBoxerRating: [Array],
      firstBoxerWeight: 240.75,
      judges: [Array],
      links: [Object],
      location: '2300 Arena, Philadelphia',
      metadata: '<a href="/en/judge/402009">Pierre Benoist</a> 79-73 | <a href="/en/judge/401245">Lynne Carter</a> 78-74 | <a href="/en/judge/677642">Eric Dali</a> 79-73\n' +
        '<br>',
      numberOfRounds: [Array],
      outcome: 'win',
      rating: 20,
      referee: [Object],
      result: [Array],
      secondBoxer: [Object],
      secondBoxerLast6: [Array],
      secondBoxerRating: [Array],
      secondBoxerRecord: [Object],
      secondBoxerWeight: 238,
      titles: []
    },
    {
      date: '2014-08-02',
      firstBoxerRating: [Array],
      firstBoxerWeight: 236.5,
      judges: [Array],
      links: [Object],
      location: 'Revel Resort, Atlantic City',
      metadata: '  time: 1:48\n' +
        ' | <a href="/en/judge/401683">Lindsey Page</a>\n' +
        '<br>Williams down three times\n' +
        '<br>',
      numberOfRounds: [Array],
      outcome: 'win',
      rating: 20,
      referee: [Object],
      result: [Array],
      secondBoxer: [Object],
      secondBoxerLast6: [Array],
      secondBoxerRating: [Array],
      secondBoxerRecord: [Object],
      secondBoxerWeight: 233,
      titles: []
    },
    {
      date: '2014-09-19',
      firstBoxerRating: [Array],
      firstBoxerWeight: 237,
      judges: [Array],
      links: [Object],
      location: "Harrah's Philadelphia, Chester",
      metadata: '  time: 1:34\n' +
        ' | <span>referee:</span> <a href="/en/referee/401364">Benjy Esteves Jr</a><span> | </span><a href="/en/judge/401043">Bernard Bruni</a> | <a href="/en/judge/400983">Larry Hazzard Jr</a> | <a href="/en/judge/402781">Alan Rubenstein</a>\n' +
        '<br>',
      numberOfRounds: [Array],
      outcome: 'win',
      rating: 20,
      referee: [Object],
      result: [Array],
      secondBoxer: [Object],
      secondBoxerLast6: [Array],
      secondBoxerRating: [Array],
      secondBoxerRecord: [Object],
      secondBoxerWeight: 288,
      titles: []
    },
    {
      date: '2014-11-14',
      firstBoxerRating: [Array],
      firstBoxerWeight: 244,
      judges: [Array],
      links: [Object],
      location: "Harrah's Philadelphia, Chester",
      metadata: '  time: 2:28\n' +
        ' | <span>referee:</span> <a href="/en/referee/401364">Benjy Esteves Jr</a><span> | </span><a href="/en/judge/677642">Eric Dali</a> | <a href="/en/judge/400983">Larry Hazzard Jr</a> | <a href="/en/judge/671032">Mike Somma</a>\n' +
        '<br>',
      numberOfRounds: [Array],
      outcome: 'win',
      rating: 40,
      referee: [Object],
      result: [Array],
      secondBoxer: [Object],
      secondBoxerLast6: [Array],
      secondBoxerRating: [Array],
      secondBoxerRecord: [Object],
      secondBoxerWeight: 209,
      titles: []
    },

---

这样的办法应该行得通

fighters.forEach((fighter) => {
    let data = '';

    for (const key in fighter.output) {
        if (Array.isArray(fighter.output[key])) {
            data += JSON.stringify(fighter.output[key]) + ',';
        } else if (typeof fighter.output[key] === 'object') {
            data += JSON.stringify(fighter.output[key]) + ',';
        } else {
            data += fighter.output[key] + ',';
        }
    }
    data = data.replace(/(^,)|(,$)/g, ""); // Remove trailing comma
    data += '\n'; // Add new line

    fs.appendFile('data.csv', data, (err) => {
        if (err) throw err;
    });
});

没有测试代码。此外，根据数据大小，创建

data.csv

文件可能需要一些时间。甚至在nodejs完成文件写入之前，

forEach

外观也将完成。因此，程序可能会退出，但在后台编写可能会一直进行到完成。您必须维护

async

执行部分。如何处理不在这个问题的范围之内

fighters.forEach((fighter) => {
    let data = '';

    for (const key in fighter.output) {
        if (Array.isArray(fighter.output[key])) {
            data += JSON.stringify(fighter.output[key]) + ',';
        } else if (typeof fighter.output[key] === 'object') {
            data += JSON.stringify(fighter.output[key]) + ',';
        } else {
            data += fighter.output[key] + ',';
        }
    }
    data = data.replace(/(^,)|(,$)/g, ""); // Remove trailing comma
    data += '\n'; // Add new line

    fs.appendFile('data.csv', data, (err) => {
        if (err) throw err;
    });
});