Variables in pipelines
brian.goetz at oracle.com
Wed Aug 15 12:49:44 PDT 2012
One thing you could do here is use "mapped", which is an operation on a
linear stream that produces a MapStream:
rects.mapped(r1 -> rotate(alpha)) // produces stream of (r1, rotated)
.tap((r1, r2) -> ...);
Now downstream stages have access to both.
(What you're specifically asking for doesn't really make linguistic
sense; r1 is like a method parameter, which isn't available outside that
On 8/15/2012 3:33 PM, Jose wrote:
> Let suppose I want to do some operations in a stream of rectangles: rotate
> them and finding the intersection of the rotateded rectangles with the
> original ones:
> Here "tap" refers to the discusion on forEach
> The problem is that being r1 a dummy variable, its reference is lost in the
> next link of the chain.
> It would be possible and desirable to keep the references of the variables
> inside a pipeline?.
> Maybe you can use BiMapper to keep trace of another variable, but the code
> would be much more cumbersome.
> Not to say if you want to reuse two o more variables along the pipeline.
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