(Node.js) Update CSV File

Demonstrates how to read a CSV, update some cells, and save.

The Chilkat CSV library/component/class is freeware. The downloads for .NET, C++, Perl, Java, Ruby, and Python contain all of the Chilkat classes, some of which are freeware and some of which require licensing.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // This example program loads a file (sample.csv)
    // that contains this content:
    // 
    // year,color,country,food
    // 2001,red,France,cheese
    // 2005,blue,"United States",hamburger
    // 2008,green,Italy,pasta
    // 1998,orange,Japan,sushi
    // 
    // The first row contains the column names.
    // This file is available at:
    // http://www.chilkatsoft.com/testData/sample.csv

    var csv = new chilkat.Csv();

    // Prior to loading the CSV file, indicate that the 1st row
    // should be treated as column names:
    csv.HasColumnNames = true;

    // Load the CSV records from the file:
    var success;
    success = csv.LoadFile("sample.csv");
    if (success !== true) {
        console.log(csv.LastErrorText);
        return;
    }

    // Change "cheese" to "baguette"
    // ("cheese" is at row=0, column=3
    success = csv.SetCell(0,3,"baguette");

    // Change "blue" to "magenta"
    success = csv.SetCell(1,1,"magenta");

    // Write the updated CSV to a string and display:
    var csvDoc;
    csvDoc = csv.SaveToString();
    console.log(csvDoc);

    // Save the CSV to a file:
    success = csv.SaveFile("out.csv");
    if (success !== true) {
        console.log(csv.LastErrorText);
    }


}

chilkatExample();