No 'fold left' without a combiner ?
forax at univ-mlv.fr
Tue Sep 10 08:42:23 PDT 2013
On 09/09/2013 05:32 PM, Brian Goetz wrote:
>> or better, have a foldLeft (or whatever it's name) on Stream that throws
>> an IllegalStateException if the stream is parallel.
> No, that's not better :)
> The pervasive sequential-think that most developers bring to the table
> in 2013 is not anyone's friend. We've gone to great effort to design
> an API where, if properly used, works correctly regardless of whether
> the pipeline executes sequentially or in parallel. The result is a
> cleaner and simpler API, and one that better prepares developers for
> computing in the coming decade.
> Adding a handful of sequential-only operations may make certain use
> cases easier, but there's a hidden cost -- reasoning about stream
> pipelines becomes harder for everyone, because now parallel
> compatibility becomes an element of the model which must be
> considered. Short-term gain, long-term pain. No thank you!
so for my example, the idea is to *not* use a stream and use a for loop
instead, right ?
> Please deposit your sequential glasses in the bin by the door. You
> won't be needing them any more.
More information about the lambda-libs-spec-observers