void switchPlaces(Actor[][] world, Node[] nullArray){
        int count = 0;
        for (int i = 0; i < world.length; i++){
            for (int j = 0; j < world.length; j++){
                if (world[i][j] != null && !world[i][j].isSatisfied){
                    int x = nullArray[count].j;
                    int y = nullArray[count].i;
                    world[y][x] = world[i][j];
                    world[i][j] = null;
                    count++;
                }
            }
        }
    }