Re : I need Help

It is not a way to return a single element by a special magic!

I guess there's some sorta miscommunication!
The way I understood is that this exotic syntax filters out a specific element from a returned array.
Now you just say that it's not a way to return a single element?  

I did an example below, and it doesn't compile b/c
it cannot convert an int (a single element) into an int[] (a whole array)!

And your 2nd example doesn't filter out anything. So, nothing exotic there! 

void setup() {
  int[] a;

  // regular expected access:
  a = getArray();
  println(a);

  // cannot convert int to int[]:
  a = getArray()[1];  
  println(a[1]);

  exit();
}

int[] getArray() {
  return new int[] {-2, 34, 5};
}