average_double

Description:


public Collector<double?,Object,G> average_double<G> (owned MapFunc<double?,G> mapper)

Returns a collector that produces the arithmetic mean of the given function applied to the elements. If there are no elements, the result is 0.

The mapper function must not return null.

Parameters:

mapper

a mapping function

Returns:

the collector implementation


Namespace: Gpseq.Collectors
Package: gpseq-1.0