Coderwall article: https://coderwall.com/p/ttbjjq

flip.js

#!/usr/bin/env node

function iNeedAnswers() {
  var args = Array.prototype.slice.call(arguments),
      answerCount = 0,
      answers;
  if (args.length < 1) { sampleRate = 1000; }
  else if (parseInt(args[0], 10) != args[0]) { sampleRate = 1000; }
  else { sampleRate = parseInt(args.shift(), 10); }

  if (args.length < 2) {
    args = ["Yes", "No"];
  }

  answers = args.reduce(function(carry, answer) {
    carry[answer] = 0;
    return carry;
  }, {});

  answerCount = args.length;

  // Build an array with 1000 zeros
  return Array.apply(null, new Array(sampleRate))
    .map(Number.prototype.valueOf, 0)
    .map(function() {
        // Fill up with zeros and ones
        // based on random numbers (odd or even)
        return Math.round(Math.random()*100000) % answerCount;
    })
    .reduce(
      function(carry, i) {
        carry[args[i]]++;
        return carry;
      },
      answers
    );
}

console.log(iNeedAnswers.apply(this, process.argv.slice(2)));