Spliterator

[Remi Forax]

On 11/28/2012 12:49 PM, Doug Lea wrote:

>
> BTW about a previous question wrt ConcurrentModificationException.
> Remember that, despite its name, this method has little to do with
> concurrency. It normally catches only those iterator loops in which
> you are modifying the structure of the thing you are iterating (as in,
> adding elements) inside the iterator loop. (There are no volatiles
> in "modCount" mechanics.) So the specialized implementation of forEach
> in ArrayList can ignore modCounts and traverse at full speed.

Doug,
if you talk about the parallel implementation, I agree.

For the serial implementation the code has to check if modCount is 
modified in the loop and relies on the fact that the VM should move the 
check outside the loop if modCount is actually not changed.

>
>
> -Doug

Rémi