Random numbers 1-13 that don't repeat more than once

Processing Coding Questions
1

Is it possible to randomly generate an int value going 1-13 and not make the numbers repeat more than once during this sequence?

1 Like
2

I want this number to randomise the order of the quiz and be able to restart it with a different order each time @Chrisir magic?

3

Yes. There are many ways, but one easy built-in way is to make an IntList, then call shuffle().

https://processing.org/reference/IntList_shuffle_.html

2 Likes
4 



IntList inventory;

void setup() {
  size(200, 200);
  inventory = new IntList();
  inventory.append(1);
  inventory.append(2);
  inventory.append(3);

  inventory.append(4);
  inventory.append(5);
  inventory.append(6);

  println(inventory);
  inventory.shuffle();
  println(inventory);

  int a  = inventory.get(2); 
  println(a);
}
1 Like
5 
final IntList sequence = IntList.fromRange(1, 14);
println(sequence);//IntList size=13 [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 ]

sequence.shuffle(this);
println(sequence);

exit();
3 Likes