Reading from csv, cell by cell in Node.js

Question

Reading from csv, cell by cell in Node.js

I'm beginner to Node.js. Trying to read from a csv file, cell by cell. I used the code below, but this code reads and write all the csv file at once. This shows cloumn[0] of all the rows at once.

var csv=require('ya-csv');
var reader= csv.createCsvFileReader('data.csv');
var writer= new csv.CsvWriter(process.stdout);
reader.addListener('data',Function(data) {
writer.writeRecord([data[0]);
});

node.js
csv

Answer 1

perhaps looking into how the listener outputs the data will be useful for your application. In this example the listener is called once for each column. By the way ya-csv doesn't transpose the output.

var csv = require('ya-csv');

var reader = csv.createCsvFileReader('data.csv', { 'separator': ',' });
// hello, world
// some, data
reader.setColumnNames([ 'col1', 'col2' ]);
var i = 0 ;
reader.addListener('data', function(data) {
    console.log(i++, data.col1);
    console.log(i++, data.col2);
});

OUTPUT
0 hello
1 world
2 some
3 data