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Re: [ljc] Java 8 executors, the denouement

From: Russel W.
Sent on: Thursday, March 27, 2014, 6:32 PM 
On Thu,[masked] at 08:41 -0400, Kevin Wright wrote:
> 
> 
> Look ma, no mutation!
> 
> 
>         final double pi = 4.0d * delta * IntStream.range(0,
>         numberOfTasks).mapTo­Obj(i ->
>           CompletableFuture.su­pplyAsync(() ->
>             <stuff using taskId resulting in a double>
>           )
>         ).mapToDouble(Comple­tableFuture::join).s­um();

The explicit future are wrong in this approach. The "real thing" would
likely be:

final double pi = 4.0d * delta * IntStream.range(0, numberOfTasks).paral­lel().mapToDouble(
	<stuff to calculate a double>
).sum();      

Well that's the version I've had for a while.

-- 
Russel.
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