How to generate random string in dart?

Question

I want to create a function that generates a random string in dart. It should include alphabets and numbers all mixed together. How can I do that?

Answer 1

Option A with charCodes:

import 'dart:math';

String generateRandomString(int len) {
  var r = Random();
  return String.fromCharCodes(List.generate(len, (index) => r.nextInt(33) + 89));
}

Generates random string using visible characters including special ones.

Option B with a predefined string:

import 'dart:math';

String generateRandomString(int len) {
  var r = Random();
  const _chars = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz1234567890';
  return List.generate(len, (index) => _chars[r.nextInt(_chars.length)]).join();
}