final int NUM = 10;
final PVector[] coords = new PVector[NUM];

coords[5] = new PVector(30, -.5, THIRD_PI);
println(coords[5]);

exit();

final static int NUM = 10;
final MyClass[] coords = new MyClass[NUM];

void setup() {
  for (int i = 0; i != NUM; coords[i] = new MyClass(i++));

  println(coords);

  exit();
}

class MyClass {
  int idx;

  MyClass(int index) {
    idx = index;
  }

  String toString() {
    return "Index: #" + idx;
  }
}

/** 
 * ArrayIndexOf (v1.0)
 * based on Apache (2004)
 * mod GoToLoop (2013/Sep)
 * 
 * http://forum.processing.org/topic/how-to-get-index-of-an-array-object-from-itself
 *
 * http://www.java2s.com/Code/Java/Collections-Data-Structure/
 * Findstheindexofthegivenobjectinthearraystartingatthegivenindex.htm
 */

final static int NUM = 10;
final PVector[] coords = new PVector[NUM];

void setup() {
  for ( int i = 0; i != NUM; coords[i++] = 
  new PVector(random(PI), random(THIRD_PI), (color) random(#000000)) );

  println(coords);
  println();

  final int pick = (int) random(NUM);
  final int idx  = arrayIndexOf(coords, coords[pick]);

  println("Index of " + coords[pick] + " = " + idx);

  exit();
}

static final int arrayIndexOf(Object[] arr, Object search) {
  return arrayIndexOf(arr, search, 0);
}

static final int arrayIndexOf(Object[] arr, Object search, int start) {
  if (arr == null)   return -1;

  start = abs(start);

  if (search == null) {
    for (int i = start; i != arr.length; ++i)
      if (arr[i] == null)   return i;
  }

  else for (int i = start; i != arr.length; ++i)
    if (search.equals(arr[i]))  return i;

  return -1;
}