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

[Howard Lovatt]

Yes I use it to iterate over indexes mainly; as a direct replacement for a for loop, with the body of the loop as the argument to forEach.

If you need an inclusive range then you can use the whileTrue form with (i) -> i <= inclusiveEnd; provided inclusiveEnd isn't MAX_VAL, in which case && i >= from also needed. 

For reverse loops I do:

  from(array.length - 1).whileTrue((i) -> i >= 0).step(-1).stream()...

IE it is up to the programmer to get the limits right and consistent with step, I don't check the values because I don't know them for the generalised forms of to (whileTrue) and step (with lambda argument). 

 -- Howard. 

Sent from my iPad

On 04/05/2013, at 1:42 PM, John Rose <john.r.rose at oracle.com> wrote:

> On May 3, 2013, at 8:30 PM, John Rose <john.r.rose at oracle.com> wrote:
> 
>> Do you use the API mainly for array (or list or vector) index generation
> 
> P.S. Also, what does it look like when you need to iterate over an array in reverse order?