list.add(0,element) faults on empty list.

I guess this is more a rant than a question.

Do this--

List<Integer> myList = new list<Integer>();
...
myList.add(0,86);

And your program faults with an index out of bounds exception.

That forces you to code --

List<Integer> myList = new list<Integer>();
...
if (myList.size() == 0) {
  myList.add(86);
} else {
  myList.add(0,86);
}

It would be nice if you add(0,newElement) just added the element to the beginning of the list regardless of whether it had any members yet.

Java documentation on list.add() says -- IndexOutOfBoundsException - if the index is out of range (index < 0 || index > size())

So in Java index == size() would be legal.

Why didn't they just to that in Apex?

goabhigo
Which line is causing this error?

Ken_Koellner
If you do myList.add(0,xyzzy); on an empty list, you get an index out of bounds exception.

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