Fisher-Yates-Shuffle (shuffling of array elements)

fisher-yates-shuffle.cpp

// using Qt

QByteArray shuffled(const QByteArray &ba)
{
  QByteArray result = ba;
  int n = result.count();
  char *c = result.data();
  while (n) {
    int j = qrand() % n--;
    char tmp = *(c + n);
    *(c + n) = *(c + j);
    *(c + j) = tmp;
  }
  return result;
}

QString shuffled(const QString& s)
{
  QString result = s;
  int n = result.count();
  QChar *c = result.data();
  while (n) {
    int j = qrand() % n--;
    QChar tmp = *(c + n);
    *(c + n) = *(c + j);
    *(c + j) = tmp;
  }
  return result;
}

fisher-yates-shuffle.js

// see http://bost.ocks.org/mike/shuffle/

function shuffle(array) {
  var m = array.length, t, i;

  // While there remain elements to shuffle…
  while (m) {

    // Pick a remaining element…
    i = Math.floor(Math.random() * m--);

    // And swap it with the current element.
    t = array[m];
    array[m] = array[i];
    array[i] = t;
  }

  return array;
}