Dart

Generating Random ASCII Strings

See more PRNG Examples

Demonstrates how to generate random us-ascii strings. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final fortuna = CkPrng();

  var bDigits = false;
  var bLowercase = false;
  var bUppercase = false;

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

  print('-- only lowercase alpha (a-z)');
  for (var i = 1; i <= 10; i++) {
    // Generate 20-character strings.
    print(fortuna.randomString(20, bDigits, bLowercase, bUppercase));
  }

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

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

  // Allow only digits (0-9)
  bUppercase = false;
  bLowercase = false;
  print('-- only digits (0-9)');
  for (var i = 1; i <= 10; i++) {
    // Generate 20-character strings.
    print(fortuna.randomString(20, bDigits, bLowercase, bUppercase));
  }
}