ints(), longs(), doubles() <was> Re: Ranges

[Paul Sandoz]

On May 3, 2013, at 3:00 PM, Tim Peierls <tim at peierls.net> wrote:

> On Fri, May 3, 2013 at 4:46 AM, Paul Sandoz <paul.sandoz at oracle.com> wrote:
> Following on from this are the idiomatic stream creation methods, we have previously discussed:
> 
>   IntStream.ints();
>   LongStream.longs();
>   DoubleStream.doubles();
> 
> Half-open, or closed? I think a closed range would be the most likely expectation, and could be implemented using rangeClosed.
> 
> doubles() would be restricted to [0.0, 2.0^53].
> 
> I've missed something. How will the user see a difference between ints() implemented as a closed range vs. a half-open range?
> 

The closed range will be for all non-negative int values, where as the half open will be for all non-negative int values except Integer.MAX_VALUE.

e.g. the difference between:

  for (int i = 0; i < Integer.MAX_VALUE; i++) { ... }

and:

  for (int i = 0; i <= Integer.MAX_VALUE && i >= 0; i++) { ... }

Paul.
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