shuffling QStringList elements!

[Kushan]

In my Qt c++ application I have a QStringList containing a set of QString values! I want to shuffle(change the positions of the QStrings in the QStringList arbitrarily) . Is there any default function like "shuffle_array" API in perl? If not how can I do it?

eg-
QStringList names;
names<<"John"<<"Smith"<<"Anne";

shuffling may change the positions of John,Smith and Anne arbitrarily! How can I achieve this?

[joeQ]

@Kushan Hi, friend. Welcome.

Did your mean want to swap two element position?

if Yes. you can use void QList::swap(int i,intj)

Just like Qt help manual like:

  QList<QString> list;
  list << "A" << "B" << "C" << "D" << "E" << "F";
  list.swap(1, 4);
  // list: ["A", "E", "C", "D", "B", "F"]

[Kushan]

@joeQ No change the positions of all elements randomly!

[joeQ]

@Kushan

Ok, like below ?

void getTwoSwapPosition(int min,int max,int &a,int &b)
{
    /// you could use qrand function get two random number as a,b
    /// a and b must between in min and max [min,max]
}

int a,b,min,max;
min = 0;
max = strlist.size()-1;
for(/**....*/){
   getTwoSwapPosition(min,max,a,b);
   strlist.swap(a,b);
}

[Kushan]

@joeQ This is only for 2 elements right? I need for all the elements :)

[Taz742]

@Kushan
http://www.cplusplus.com/reference/algorithm/random_shuffle/