Type Alias GroupingMapBy 

pub type GroupingMapBy<I, F> = GroupingMap<MapSpecialCase<I, GroupingMapFn<F>>>;

GroupingMapBy is an intermediate struct for efficient group-and-fold operations.

See GroupingMap for more informations.

Aliased Type

pub struct GroupingMapBy<I, F> {
    iter: MapSpecialCase<I, GroupingMapFn<F>>,
}

Fields

iter: MapSpecialCase<I, GroupingMapFn<F>>