Two questions about forEach
Maurizio Cimadamore
maurizio.cimadamore at oracle.com
Wed Aug 8 04:47:51 PDT 2012
On 08/08/12 11:51, Jose wrote:
> 1. This code won't compile because of the return type of add(). Is this
> behaviour on porpouse?
>
> public static void main(String[] args) {
> List<String> names=new ArrayList<>();
> Set<String> registry=new HashSet<>();
> names.forEach(n->registry.add(n));
> }
Hi Jose
try with:
names.forEach(n-> { registry.add(n); });
we are exploring some enhancements in this area.
>
> This forces to me to use map() instead, and get an iterable of booleans.
>
>
> 2. Why forEach() returns void?. In this way the pipeline is sealed at the
> end, no more pieces can be attached to it.
> It would better returning the incomming iterable (its elements maybe
> modified by the lambda)
>
>
I'll leave this to our library gurus...
Maurizio
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