(Node.js) Generating Random ASCII Strings

Demonstrates how to generate random us-ascii strings.

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

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

    // All Chilkat classes can be unlocked at once at the beginning of a program
    // by calling UnlockBundle.  It requires a Bundle unlock code.
    var chilkatGlob = new chilkat.Global();
    var success = chilkatGlob.UnlockBundle("Anything for 30-day trial.");
    if (success !== true) {
        console.log(chilkatGlob.LastErrorText);
        return;
    }

    var fortuna = new chilkat.Prng();

    var bDigits;
    var bLowercase;
    var bUppercase;

    // Generate random strings having only lowercase chars (a-z)
    // Disallow digits and uppercase and only allow lowercase
    bDigits = false;
    bUppercase = false;
    bLowercase = true;

    var i;

    console.log("-- only lowercase alpha (a-z)");
    for (i = 1; i <= 10; i++) {
        // Generate 20-character strings.
        console.log(fortuna.RandomString(20,bDigits,bLowercase,bUppercase));
    }

    // Allow both lowercase and uppercase alpha chars
    bUppercase = true;
    console.log("-- lower and uppercase alpha (a-zA-Z)");
    for (i = 1; i <= 10; i++) {
        // Generate 20-character strings.
        console.log(fortuna.RandomString(20,bDigits,bLowercase,bUppercase));
    }

    // Allow digits (0-9)
    bDigits = true;
    console.log("-- digits and lower/uppercase alpha (0-9a-zA-Z)");
    for (i = 1; i <= 10; i++) {
        // Generate 20-character strings.
        console.log(fortuna.RandomString(20,bDigits,bLowercase,bUppercase));
    }

    // Allow only digits (0-9)
    bUppercase = false;
    bLowercase = false;
    console.log("-- only digits (0-9)");
    for (i = 1; i <= 10; i++) {
        // Generate 20-character strings.
        console.log(fortuna.RandomString(20,bDigits,bLowercase,bUppercase));
    }


}

chilkatExample();