如何使用Node JS将CSV文件转换为JSON文件？

Question

const fs = require('fs');
 const csv =require('fast-csv');
 const path= require('path');
fs.createReadStream('translation.csv')
    .pipe(csv())
    .on('data',function (data) {
        console.log(data);
    })
    .on('end',function (data) {
        console.log('data end');

    })

This code read the csv file but I don't know who to convert into json file.Anyone please help me.

Answer 1

I don't know how fast-csv works but I assume that the first emitted data is headers, you'll want to reference those, probably something like

const items = [];
// ...
.on(data, data => items.push(data));
// ...
const headers = items.shift();

then you can use a simple algorithm like this

// assuming data looks like so
const headers = ['a', 'b'];
const items = [[1, 2], [3, 4]];

const r = [];

for (let i = 0; i < items.length; i++) {
  let obj = {};
  let row = items[i];
    for (let j = 0; j < row.length;j++) {
    obj[headers[j]] = row[j];
   }
   r.push(obj);
}

console.log(r);
console.log(JSON.stringify(r));