Yet another run at reduce

[Doug Lea]

On 01/08/13 11:41, Brian Goetz wrote:
> Yep.  The "leftCombining" part is simply adapting a BiBlock to a BiFunction:
>
>    (t, u) -> { block.accept(t,u); return t; }

Deja vu from last week with CompletableFuture where I ended up
supporting multiple distinct forms.

Doing which depends on your audience's tolerance for
inescapable goopy adapters vs adding multiple versions
of a method that avoid the need for them. For j.u.c audience
it wasn't a hard decision, and people told me that the
resulting API is a little more user-friendly/decodable anyway.

-Doug