API question/request: Array to Stream

[Paul Sandoz]

On Oct 1, 2013, at 4:29 PM, Per Bothner <per at bothner.com> wrote:

> On 10/01/2013 07:16 AM, Paul Sandoz wrote:
>> 
>> On Oct 1, 2013, at 3:24 PM, "Millies, Sebastian" <Sebastian.Millies at softwareag.com> wrote:
>> 
>>> Why can't I stream an array? It is awkward having to convert to a list first, cf.
>>> this code by Venkat Subramaniam:
> 
> On 10/01/2013 07:16 AM, Paul Sandoz wrote
>> Use:
>> 
>>   Stream.of(filters)...
> 
> Better, IMO: Arrays.stream(filters), for 2 reasons:
> 
> (1) Arrays.stream has options startInclusive/endInclusive bounds.
> If you have an array buffer that's not necessary full, then you
> need the endInclusive (though admittedly an alternative is Stream#limit).
> 

Yes, if you need to stream over a range elements in the array. (While there is limit i would not recommend using that if one can effectively limit at the source since that will be more efficient.)

Otherwise, i prefer Stream.of. As you say it is a matter of style so somewhat subjective.

Paul.

> (2) As a matter of style, Stream#of is a varargs method: It takes a
> variable number of T, not an array of T.  True, variable number of T
> is implemented as (and effectively overloaded as) an array of T,
> but Java varargs is a bit of a hack and and using ivarargs to pass a
> single array is less readable I think.
> -- 
> 	--Per Bothner
> per at bothner.com   http://per.bothner.com/