Cara mengonversi JSON ke format CSV dan menyimpannya dalam variabel

Question 1

Saya memiliki tautan yang membuka data JSON di browser, tetapi sayangnya saya tidak tahu cara membacanya. Adakah cara untuk mengonversi data ini menggunakan JavaScript dalam format CSV dan menyimpannya dalam file JavaScript?

Datanya terlihat seperti:

{
  "count": 2,
  "items": [{
    "title": "Apple iPhone 4S Sale Cancelled in Beijing Amid Chaos (Design You Trust)",
    "description": "Advertise here with BSA Apple cancelled its scheduled sale of iPhone 4S in one of its stores in China\u2019s capital Beijing on January 13. Crowds outside the store in the Sanlitun district were waiting on queues overnight. There were incidents of scuffle between shoppers and the store\u2019s security staff when shoppers, hundreds of them, were told that the sales [...]Source : Design You TrustExplore : iPhone, iPhone 4, Phone",
    "link": "http:\/\/wik.io\/info\/US\/309201303",
    "timestamp": 1326439500,
    "image": null,
    "embed": null,
    "language": null,
    "user": null,
    "user_image": null,
    "user_link": null,
    "user_id": null,
    "geo": null,
    "source": "wikio",
    "favicon": "http:\/\/wikio.com\/favicon.ico",
    "type": "blogs",
    "domain": "wik.io",
    "id": "2388575404943858468"
  }, {
    "title": "Apple to halt sales of iPhone 4S in China (Fame Dubai Blog)",
    "description": "SHANGHAI \u2013 Apple Inc said on Friday it will stop selling its latest iPhone in its retail stores in Beijing and Shanghai to ensure the safety of its customers and employees. Go to SourceSource : Fame Dubai BlogExplore : iPhone, iPhone 4, Phone",
    "link": "http:\/\/wik.io\/info\/US\/309198933",
    "timestamp": 1326439320,
    "image": null,
    "embed": null,
    "language": null,
    "user": null,
    "user_image": null,
    "user_link": null,
    "user_id": null,
    "geo": null,
    "source": "wikio",
    "favicon": "http:\/\/wikio.com\/favicon.ico",
    "type": "blogs",
    "domain": "wik.io",
    "id": "16209851193593872066"
  }]
}

Yang paling dekat yang bisa saya temukan adalah: Ubah format JSON ke format CSV untuk MS Excel

Tetapi mengunduh dalam file CSV, saya menyimpannya dalam variabel, seluruh data yang dikonversi.

Juga ingin tahu bagaimana mengubah karakter melarikan diri: '\u2019'kembali normal.

Saya mencoba kode ini:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
  <title>JSON to CSV</title>
  <script src="http://code.jquery.com/jquery-1.7.1.js" type="text/javascript"></script>
  <script type="text/javascript">
    var json3 = {
      "count": 2,
      "items": [{
          "title": "Apple iPhone 4S Sale Cancelled in Beijing Amid Chaos (Design You Trust)",
          "description": "Advertise here with BSA Apple cancelled its scheduled sale of iPhone 4S in one of its stores in China’s capital Beijing on January 13. Crowds outside the store in the Sanlitun district were waiting on queues overnight. There were incidents of scuffle between shoppers and the store’s security staff when shoppers, hundreds of them, were told that the sales [...]Source : Design You TrustExplore : iPhone, iPhone 4, Phone",
          "link": "http://wik.io/info/US/309201303",
          "timestamp": 1326439500,
          "image": null,
          "embed": null,
          "language": null,
          "user": null,
          "user_image": null,
          "user_link": null,
          "user_id": null,
          "geo": null,
          "source": "wikio",
          "favicon": "http://wikio.com/favicon.ico",
          "type": "blogs",
          "domain": "wik.io",
          "id": "2388575404943858468"
        },
        {
          "title": "Apple to halt sales of iPhone 4S in China (Fame Dubai Blog)",
          "description": "SHANGHAI – Apple Inc said on Friday it will stop selling its latest iPhone in its retail stores in Beijing and Shanghai to ensure the safety of its customers and employees. Go to SourceSource : Fame Dubai BlogExplore : iPhone, iPhone 4, Phone",
          "link": "http://wik.io/info/US/309198933",
          "timestamp": 1326439320,
          "image": null,
          "embed": null,
          "language": null,
          "user": null,
          "user_image": null,
          "user_link": null,
          "user_id": null,
          "geo": null,
          "source": "wikio",
          "favicon": "http://wikio.com/favicon.ico",
          "type": "blogs",
          "domain": "wik.io",
          "id": "16209851193593872066"
        }
      ]
    }
    //var objJson = JSON.parse(json3.items);

    DownloadJSON2CSV(json3.items);

    function DownloadJSON2CSV(objArray) {
      var array = typeof objArray != 'object' ? JSON.parse(objArray) : objArray;

      var str = '';

      for (var i = 0; i < array.length; i++) {
        var line = '';

        for (var index in array[i]) {
          line += array[i][index] + ',';
        }

        line.slice(0, line.Length - 1);

        str += line + '\r\n';
      }
      $('div').html(str);
    }
  </script>

</head>

<body>
  <div></div>
</body>

</html>

Tapi sepertinya tidak berhasil. Dapatkah seseorang tolong bantu?

Question 2

Cara yang lebih elegan untuk mengonversi json ke csv adalah dengan menggunakan fungsi peta tanpa kerangka kerja apa pun:

var json = json3.items
var fields = Object.keys(json[0])
var replacer = function(key, value) { return value === null ? '' : value } 
var csv = json.map(function(row){
  return fields.map(function(fieldName){
    return JSON.stringify(row[fieldName], replacer)
  }).join(',')
})
csv.unshift(fields.join(',')) // add header column
 csv = csv.join('\r\n');
console.log(csv)

Keluaran:

title,description,link,timestamp,image,embed,language,user,user_image,user_link,user_id,geo,source,favicon,type,domain,id
"Apple iPhone 4S Sale Cancelled in Beijing Amid Chaos (Design You Trust)","Advertise here with BSA Apple cancelled its scheduled sale of iPhone 4S in one of its stores in China’s capital Beijing on January 13. Crowds outside the store in the Sanlitun district were waiting on queues overnight. There were incidents of scuffle between shoppers and the store’s security staff when shoppers, hundreds of them, were told that the sales [...]Source : Design You TrustExplore : iPhone, iPhone 4, Phone","http://wik.io/info/US/309201303","1326439500","","","","","","","","","wikio","http://wikio.com/favicon.ico","blogs","wik.io","2388575404943858468"
"Apple to halt sales of iPhone 4S in China (Fame Dubai Blog)","SHANGHAI – Apple Inc said on Friday it will stop selling its latest iPhone in its retail stores in Beijing and Shanghai to ensure the safety of its customers and employees. Go to SourceSource : Fame Dubai BlogExplore : iPhone, iPhone 4, Phone","http://wik.io/info/US/309198933","1326439320","","","","","","","","","wikio","http://wikio.com/favicon.ico","blogs","wik.io","16209851193593872066"

Perbarui ES6 (2016)

Gunakan sintaks yang kurang padat ini dan juga JSON.stringify untuk menambahkan tanda kutip ke string sambil menjaga agar angka tidak dikutip:

const items = json3.items
const replacer = (key, value) => value === null ? '' : value // specify how you want to handle null values here
const header = Object.keys(items[0])
let csv = items.map(row => header.map(fieldName => JSON.stringify(row[fieldName], replacer)).join(','))
csv.unshift(header.join(','))
csv = csv.join('\r\n')

console.log(csv)

Question 3

Ok saya akhirnya mendapatkan kode ini berfungsi:

<html>
<head>
    <title>Demo - Covnert JSON to CSV</title>
    <script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
    <script type="text/javascript" src="https://github.com/douglascrockford/JSON-js/raw/master/json2.js"></script>

    <script type="text/javascript">
        // JSON to CSV Converter
        function ConvertToCSV(objArray) {
            var array = typeof objArray != 'object' ? JSON.parse(objArray) : objArray;
            var str = '';

            for (var i = 0; i < array.length; i++) {
                var line = '';
                for (var index in array[i]) {
                    if (line != '') line += ','

                    line += array[i][index];
                }

                str += line + '\r\n';
            }

            return str;
        }

        // Example
        $(document).ready(function () {

            // Create Object
            var items = [
                  { name: "Item 1", color: "Green", size: "X-Large" },
                  { name: "Item 2", color: "Green", size: "X-Large" },
                  { name: "Item 3", color: "Green", size: "X-Large" }];

            // Convert Object to JSON
            var jsonObject = JSON.stringify(items);

            // Display JSON
            $('#json').text(jsonObject);

            // Convert JSON to CSV & Display CSV
            $('#csv').text(ConvertToCSV(jsonObject));
        });
    </script>
</head>
<body>
    <h1>
        JSON</h1>
    <pre id="json"></pre>
    <h1>
        CSV</h1>
    <pre id="csv"></pre>
</body>
</html>

Terima kasih banyak atas semua dukungan untuk semua kontributor.

Praney

Question 4

Solusi yang sangat bagus oleh praneybehl, tetapi jika seseorang ingin menyimpan data sebagai csvfile dan menggunakan blobmetode maka mereka dapat merujuk ini:

function JSONToCSVConvertor(JSONData, ReportTitle, ShowLabel) {     

//If JSONData is not an object then JSON.parse will parse the JSON string in an Object
var arrData = typeof JSONData != 'object' ? JSON.parse(JSONData) : JSONData;
var CSV = '';    
//This condition will generate the Label/Header
if (ShowLabel) {
    var row = "";

    //This loop will extract the label from 1st index of on array
    for (var index in arrData[0]) {
        //Now convert each value to string and comma-seprated
        row += index + ',';
    }
    row = row.slice(0, -1);
    //append Label row with line break
    CSV += row + '\r\n';
}

//1st loop is to extract each row
for (var i = 0; i < arrData.length; i++) {
    var row = "";
    //2nd loop will extract each column and convert it in string comma-seprated
    for (var index in arrData[i]) {
        row += '"' + arrData[i][index] + '",';
    }
    row.slice(0, row.length - 1);
    //add a line break after each row
    CSV += row + '\r\n';
}

if (CSV == '') {        
    alert("Invalid data");
    return;
}   

//this trick will generate a temp "a" tag
var link = document.createElement("a");    
link.id="lnkDwnldLnk";

//this part will append the anchor tag and remove it after automatic click
document.body.appendChild(link);

var csv = CSV;  
blob = new Blob([csv], { type: 'text/csv' }); 
var csvUrl = window.webkitURL.createObjectURL(blob);
var filename = 'UserExport.csv';
$("#lnkDwnldLnk")
.attr({
    'download': filename,
    'href': csvUrl
}); 

$('#lnkDwnldLnk')[0].click();    
document.body.removeChild(link);
}

Question 5

Saya hanya ingin menambahkan beberapa kode di sini untuk orang-orang di masa mendatang karena saya mencoba mengekspor JSON ke dokumen CSV dan mendownloadnya.

Saya gunakan $.getJSONuntuk menarik data json dari halaman eksternal, tetapi jika Anda memiliki array dasar, Anda bisa menggunakannya.

Ini menggunakan kode Christian Landgren untuk membuat data csv.

$(document).ready(function() {
    var JSONData = $.getJSON("GetJsonData.php", function(data) {
        var items = data;
        const replacer = (key, value) => value === null ? '' : value; // specify how you want to handle null values here
        const header = Object.keys(items[0]);
        let csv = items.map(row => header.map(fieldName => JSON.stringify(row[fieldName], replacer)).join(','));
        csv.unshift(header.join(','));
        csv = csv.join('\r\n');

        //Download the file as CSV
        var downloadLink = document.createElement("a");
        var blob = new Blob(["\ufeff", csv]);
        var url = URL.createObjectURL(blob);
        downloadLink.href = url;
        downloadLink.download = "DataDump.csv";  //Name the file here
        document.body.appendChild(downloadLink);
        downloadLink.click();
        document.body.removeChild(downloadLink);
    });
});

Sunting: Perlu dicatat bahwa JSON.stringifytanda kutip akan hilang dengan menambahkan \". Jika Anda melihat CSV di excel, tidak seperti itu sebagai karakter pelarian.

Anda dapat menambahkan .replace(/\\"/g, '""')ke akhir JSON.stringify(row[fieldName], replacer)untuk menampilkan ini dengan benar di excel (ini akan menggantikan \"dengan ""yang apa yang lebih suka excel).

Garis Penuh: let csv = items.map(row => header.map(fieldName => (JSON.stringify(row[fieldName], replacer).replace(/\\"/g, '""'))).join(','));

Question 6

Jika ada yang ingin mendownloadnya juga.
Berikut adalah fungsi kecil yang luar biasa yang akan mengonversi array objek JSON ke csv, lalu mengunduhnya.

downloadCSVFromJson = (filename, arrayOfJson) => {
  // convert JSON to CSV
  const replacer = (key, value) => value === null ? '' : value // specify how you want to handle null values here
  const header = Object.keys(arrayOfJson[0])
  let csv = arrayOfJson.map(row => header.map(fieldName => 
  JSON.stringify(row[fieldName], replacer)).join(','))
  csv.unshift(header.join(','))
  csv = csv.join('\r\n')

  // Create link and download
  var link = document.createElement('a');
  link.setAttribute('href', 'data:text/csv;charset=utf-8,%EF%BB%BF' + encodeURIComponent(csv));
  link.setAttribute('download', filename);
  link.style.visibility = 'hidden';
  document.body.appendChild(link);
  link.click();
  document.body.removeChild(link);
};

Kemudian sebut seperti ini:

this.downloadCSVFromJson(`myCustomName.csv`, this.state.csvArrayOfJson)

Question 7

Ada beberapa opsi yang tersedia untuk menggunakan kembali pustaka canggih yang ada yang berbasis standar.

Jika Anda kebetulan menggunakan D3 dalam proyek Anda, maka Anda dapat langsung memanggil:

d3.csv.formatatau d3.csv.formatRowsberfungsi untuk mengubah array objek menjadi string csv.

d3.csv.formatRows memberi Anda kendali lebih besar atas properti mana yang akan diubah menjadi csv.

Silahkan lihat d3.csv.format dan d3.csv.formatRows wiki halaman.

Ada perpustakaan lain yang tersedia juga seperti jquery-csv , PapaParse . Papa Parse tidak memiliki dependensi - bahkan jQuery.

Untuk plugin berbasis jquery, silakan periksa ini .

Question 8

Coba Contoh ini

Contoh 1:

JsonArray = [{
    "AccountNumber": "123",
    "AccountName": "abc",
    "port": "All",
    "source": "sg-a78c04f8"

}, {
    "Account Number": "123",
    "Account Name": "abc",
    "port": 22,
    "source": "0.0.0.0/0",
}]

JsonFields = ["Account Number","Account Name","port","source"]

function JsonToCSV(){
    var csvStr = JsonFields.join(",") + "\n";

    JsonArray.forEach(element => {
        AccountNumber = element.AccountNumber;
        AccountName   = element.AccountName;
        port          = element.port
        source        = element.source

        csvStr += AccountNumber + ',' + AccountName + ','  + port + ',' + source + "\n";
        })
        return csvStr;
}

Contoh2:

JsonArray = [{
    "AccountNumber": "1234",
    "AccountName": "abc",
    "inbound": [{
        "port": "All",
        "source": "sg-a78c04f8"
    },
    {
        "port": 22,
        "source": "0.0.0.0/0",
    }]
}]

JsonFields = ["Account Number", "Account Name", "port", "source"]

function JsonToCSV() {
    var csvStr = JsonFields.join(",") + "\n";

    JsonArray.forEach(element => {
        AccountNumber = element.AccountNumber;
        AccountName = element.AccountName;
        
        element.inbound.forEach(inboundELe => {
            port = inboundELe.port
            source = inboundELe.source
            csvStr += AccountNumber + ',' + AccountName + ',' + port + ',' + source + "\n";
        })
    })
    return csvStr;
}

Anda bahkan dapat mengunduh file csv menggunakan kode berikut:

function downloadCSV(csvStr) {

    var hiddenElement = document.createElement('a');
    hiddenElement.href = 'data:text/csv;charset=utf-8,' + encodeURI(csvStr);
    hiddenElement.target = '_blank';
    hiddenElement.download = 'output.csv';
    hiddenElement.click();
}

Question 9

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>JSON to CSV</title>
    <script src="http://code.jquery.com/jquery-1.7.1.js" type="text/javascript"></script>
</head>
<body>
    <h1>This page does nothing....</h1>

    <script type="text/javascript">
        var json3 = {
          "count": 2,
          "items": [{
              "title": "Apple iPhone 4S Sale Cancelled in Beijing Amid Chaos (Design You Trust)",
              "description": "Advertise here with BSA Apple cancelled its scheduled sale of iPhone 4S in one of its stores in China’s capital Beijing on January 13. Crowds outside the store in the Sanlitun district were waiting on queues overnight. There were incidents of scuffle between shoppers and the store’s security staff when shoppers, hundreds of them, were told that the sales [...]Source : Design You TrustExplore : iPhone, iPhone 4, Phone",
              "link": "http://wik.io/info/US/309201303",
              "timestamp": 1326439500,
              "image": null,
              "embed": null,
              "language": null,
              "user": null,
              "user_image": null,
              "user_link": null,
              "user_id": null,
              "geo": null,
              "source": "wikio",
              "favicon": "http://wikio.com/favicon.ico",
              "type": "blogs",
              "domain": "wik.io",
              "id": "2388575404943858468"
            },
            {
              "title": "Apple to halt sales of iPhone 4S in China (Fame Dubai Blog)",
              "description": "SHANGHAI – Apple Inc said on Friday it will stop selling its latest iPhone in its retail stores in Beijing and Shanghai to ensure the safety of its customers and employees. Go to SourceSource : Fame Dubai BlogExplore : iPhone, iPhone 4, Phone",
              "link": "http://wik.io/info/US/309198933",
              "timestamp": 1326439320,
              "image": null,
              "embed": null,
              "language": null,
              "user": null,
              "user_image": null,
              "user_link": null,
              "user_id": null,
              "geo": null,
              "source": "wikio",
              "favicon": "http://wikio.com/favicon.ico",
              "type": "blogs",
              "domain": "wik.io",
              "id": "16209851193593872066"
            }
          ]
        };

        const items = json3.items
        const replacer = (key, value) => value === null ? '' : value // specify how you want to handle null values here
        const header = Object.keys(items[0])
        let csv = items.map(row => header.map(fieldName => JSON.stringify(row[fieldName], replacer)).join(','))
        csv.unshift(header.join(','))
        csv = csv.join('\r\n')

        var link = document.createElement("a");    
        link.id="lnkDwnldLnk";
        document.body.appendChild(link);
        blob = new Blob([csv], { type: 'text/csv' }); 
        var csvUrl = window.webkitURL.createObjectURL(blob);
        var filename = 'UserExport.csv';
        jQuery("#lnkDwnldLnk")
        .attr({
            'download': filename,
            'href': csvUrl
        });
        jQuery('#lnkDwnldLnk')[0].click();
        document.body.removeChild(link);
    </script>
</body>
</html>

Question 10

Adaptasi dari jawaban praneybehl untuk bekerja dengan objek bertingkat dan pemisah tab

function ConvertToCSV(objArray) {
  let array = typeof objArray != 'object' ? JSON.parse(objArray) : objArray;
  if(!Array.isArray(array))
      array = [array];

  let str = '';

  for (let i = 0; i < array.length; i++) {
    let line = '';
    for (let index in array[i]) {
      if (line != '') line += ','

      const item = array[i][index];
      line += (typeof item === 'object' && item !== null ? ConvertToCSV(item) : item);
    }
    str += line + '\r\n';
  }

  do{
      str = str.replace(',','\t').replace('\t\t', '\t');
  }while(str.includes(',') || str.includes('\t\t'));

  return str.replace(/(\r\n|\n|\r)/gm, ""); //removing line breaks: https://stackoverflow.com/a/10805198/4508758
}

Question 11

Berikut adalah cara untuk melakukannya untuk objek dinamis dalam dengan cara berorientasi objek untuk versi js yang lebih baru. Anda mungkin harus mengubah jenis yang terpisah setelah wilayah.

private ConvertToCSV(objArray) {
    let rows = typeof objArray !== "object" ? JSON.parse(objArray) : objArray;
    let  header = "";
    Object.keys(rows[0]).map(pr => (header += pr + ";"));

    let str = "";
    rows.forEach(row => {
        let line = "";
        let columns =
            typeof row !== "object" ? JSON.parse(row) : Object.values(row);
        columns.forEach(column => {
            if (line !== "") {
                line += ";";
            }
            if (typeof column === "object") {
                line += JSON.stringify(column);
            }  else {
                line += column;
            }
        });
        str += line + "\r\n";
    });
    return header + "\r\n" + str;
}

Question 12

Terkadang benda memiliki panjang yang berbeda. Jadi saya mengalami masalah yang sama dengan Kyle Pennell. Tetapi alih-alih mengurutkan array, kita hanya melewatinya dan memilih yang terpanjang. Kompleksitas waktu dikurangi menjadi O (n), dibandingkan dengan O (n log (n)) saat penyortiran pertama.

Saya mulai dengan kode dari versi ES6 (2016) Christian Landgren yang diperbarui .

json2csv(json) {
    // you can skip this step if your input is a proper array anyways:
    const simpleArray = JSON.parse(json)
    // in array look for the object with most keys to use as header
    const header = simpleArray.map((x) => Object.keys(x))
      .reduce((acc, cur) => (acc.length > cur.length ? acc : cur), []);

    // specify how you want to handle null values here
    const replacer = (key, value) => (
      value === undefined || value === null ? '' : value);
    let csv = simpleArray.map((row) => header.map(
      (fieldName) => JSON.stringify(row[fieldName], replacer)).join(','));
    csv = [header.join(','), ...csv];
    return csv.join('\r\n');
}

Question 13

Saya ingin mengabaikan jawaban @Christian Landgren di atas. Saya bingung kenapa file CSV saya hanya 3 kolom / header. Ini karena elemen pertama di json saya hanya memiliki 3 kunci. Jadi, Anda perlu berhati-hati dengan const header = Object.keys(json[0])antrean. Ini mengasumsikan bahwa elemen pertama dalam array adalah representatif. Saya memiliki JSON yang berantakan dengan beberapa objek memiliki lebih atau kurang.

Jadi saya menambahkan array.sortini yang akan memesan JSON dengan jumlah kunci. Dengan begitu file CSV Anda akan memiliki jumlah kolom maksimal.

Ini juga merupakan fungsi yang dapat Anda gunakan dalam kode Anda. Beri makan saja JSON!

function convertJSONtocsv(json) {
    if (json.length === 0) {
        return;
    }

    json.sort(function(a,b){ 
       return Object.keys(b).length - Object.keys(a).length;
    });

    const replacer = (key, value) => value === null ? '' : value // specify how you want to handle null values here
    const header = Object.keys(json[0])
    let csv = json.map(row => header.map(fieldName => JSON.stringify(row[fieldName], replacer)).join(','))
    csv.unshift(header.join(','))
    csv = csv.join('\r\n')

    fs.writeFileSync('awesome.csv', csv)
}

Question 14

Inilah versi sederhana saya untuk mengonversi larik objek ito CSV (dengan asumsi semua objek itu memiliki atribut yang sama):

var csv = []
if (items.length) {
  var keys = Object.keys(items[0])
  csv.push(keys.join(','))
  items.forEach(item => {
    let vals = keys.map(key => item[key] || '')
    csv.push(vals.join(','))
  })
}

csv = csv.join('\n')

Question 15

Tulis Csv.

function writeToCsv(dataToWrite, callback) {
    var dataToWrite;
    var fs = require('fs');
    dataToWrite = convertToCSV(dataToWrite);
    fs.writeFile('assets/distanceInfo.csv', dataToWrite, 'utf8', function (err) {
      if (err) {
        console.log('Some error occured - file either not saved or corrupted file saved.');
      } else{
        console.log('It\'s saved!');
      }
      callback("data_saved | assets/distanceInfo.csv")
    });
}

function convertToCSV(objArray) {
    var array = typeof objArray != 'object' ? JSON.parse(objArray) : objArray;
    var str = '';
    for (var i = 0; i < array.length; i++) {
        var line = '';
        for (var index in array[i]) {
            if (line != '') line += ','

            line += array[i][index];
        }
        str += line + '\r\n';
    }
    return str;
}

Question 16

Lucu tidak ada yang lengkap atau bekerja di sini (IE atau node.js). Jawab pertanyaan serupa, JSON sedikit terstruktur (misalkan tidak perlu disalin lagi), termasuk juga cuplikan demo. Konversi JSON Ke CSV (JavaScript): Cara memformat konversi CSV dengan benar Berharap tidak hanya konverter tipe tunggal, juga di Github saya (disebutkan dalam profil) serupa yang digunakan untuk menganalisis struktur JSON yang tidak diketahui. Saya penulis kode dalam jawaban ini dan semua kode di Github saya (kecuali beberapa proyek dimulai sebagai terjemahan fork / +).

Question 17

Secara pribadi saya akan menggunakan perpustakaan d3-dsv untuk melakukan ini. Mengapa demikian reinvent the wheel?


import { csvFormat } from 'd3-dsv';
/**
 * Based on input data convert it to csv formatted string
 * @param (Array) columnsToBeIncluded array of column names (strings)
 *                which needs to be included in the formated csv
 * @param {Array} input array of object which need to be transformed to string
 */
export function convertDataToCSVFormatString(input, columnsToBeIncluded = []) {
  if (columnsToBeIncluded.length === 0) {
    return csvFormat(input);
  }
  return csvFormat(input, columnsToBeIncluded);
}

Dengan pohon-gemetar Anda bisa mengimpor fungsi tertentu dari d3-dsvperpustakaan