lkatney

public static list<wrapper> randomize(list<wrapper> lst){
  integer currentIndex = lst.size();
  wrapper temporaryValue;
  integer randomIndex;
  // While there remain elements to shuffle...
  while (0 != currentIndex) {
  // Pick a remaining element...
    randomIndex = integer.valueOf(Math.floor(Math.random() * currentIndex));
    currentIndex -= 1;
    // And swap it with the current element.