Non-repeating numbers

marysia

Hi! I want to fill an array with 10 random numbers (from 1 to 20) but I don't want them to repeat.. Could anyone help me with the simplest code possible? I tried to do this using for and if but it didn't worked.. :/

koogs

How would you do this in real life? Think lottery or bingo...

GoToLoop

https://Forum.Processing.org/two/discussions/tagged?Tag=fromrange(),shuffle()

kfrajer

Make a list of 10, shuffle them and then pick the first/top 10.

Check IntList in the reference.

Kf

koogs

Fail. "From 1 to 20" it says.

GoToLoop

// Forum.Processing.org/two/discussion/27692/non-repeating-numbers#Item_5
// GoToLoop (2018-Apr-04)

final IntList randomRangeList = IntList.fromRange(1, 21);

randomRangeList.shuffle(this);
randomRangeList.resize(10);
println(randomRangeList);

final int[] randomRangeArray = randomRangeList.array();
println(randomRangeArray);

exit();

GoToLoop

// Forum.Processing.org/two/discussion/27692/non-repeating-numbers#Item_6
// GoToLoop (2018-Apr-04)

static final int QTY = 10, MIN_VAL = 1, MAX_VAL = 20 + 1;

final IntList randomRangeList = IntList.fromRange(MIN_VAL, MAX_VAL);
int[] randomRangeArray;

int[] random10Range() {
  randomRangeList.shuffle(this);
  return expand(randomRangeList.values(), QTY);
}

void setup() {
  noLoop();
}

void draw() {
  background((color) random(#000000));
  randomRangeArray = random10Range();

  println();
  println(randomRangeArray);
}

void keyPressed() {
  redraw = true;
}

void mousePressed() {
  keyPressed();
}