mysteryFunction.js

var myArray = [1,3,2,2,10,9,9,8,7,13,6,4];

var mysteryFunction = function(array) {
  var hashHadChange;
  for (var i = 0; i < array.length - 1; i++) {
    hashHadChange = false;
    for (var x = 0; x < array.length - 1; x++) {
      if (array[x] > array[x+1]) {
        var temp = array[x];
        array[x] = array[x+1];
        array[x + 1] = temp;
        hashHadChange = true;
      }
    }
    if (!hashHadChange) {
      return array;
    }
  }
  return array;
};

console.log(mysteryFunction(myArray));