Given the probability of something happening (p), and sample size (n), get a boolean such that, if the method is ran (n) number of times then you are likely to get (p*n) trues.

with_probability_of_success.dart

import 'dart:math';

Random _random = new Random();

int getRandomInt(int limit) => _random.nextInt(limit);

double randomDouble() => _random.nextDouble();

///Given the probability of something happening (p), and sample size (n), 
///get a boolean such that, if the method is ran (n) number of times then 
///you are likely to get (p*n) trues.
///
///If probability is not provided, random probability will be used
bool withProbabilityOfSuccess(bool b,
    {double? probability, int sampleSize = 100}) {
  if (!b) return false;
  if (probability == null || probability > 1 || probability < 0) {
    probability = randomDouble();
  }
  var success = probability * sampleSize;
  var failures = sampleSize - success;
  var samples = List.generate(success.toInt(), (index) => true)
    ..addAll(List.generate(failures.toInt(), (index) => false));
  return samples[getRandomInt(sampleSize)];
}