如何使用nodejs获取csv文件的总行数，并根据行号追加为新列

npm install fs csv-parser

const fs = require('fs');
const csv = require('csv-parser');

let rowCount = 0;

fs.createReadStream('path/to/csv/file.csv')
  .pipe(csv())
  .on('data', (row) => {
    rowCount++;
    // 在这里可以根据行号追加新列的数据
  })
  .on('end', () => {
    console.log('Total rows:', rowCount);
  });

.on('data', (row) => {
  rowCount++;
  row['行号'] = rowCount; // 将行号追加为新列的值
})

const fs = require('fs');
const csv = require('csv-parser');

let rowCount = 0;

fs.createReadStream('path/to/csv/file.csv')
  .pipe(csv())
  .on('data', (row) => {
    rowCount++;
    row['行号'] = rowCount; // 将行号追加为新列的值
  })
  .on('end', () => {
    console.log('Total rows:', rowCount);
  });