groupby_transform

more_itertools::augmenting::groupby_transform

Function groupby_transform 

Source 
pub fn groupby_transform<T, TKey, TValue, TReduce>(
    iter: Box<dyn Iterator<Item = T>>,
    keyfunc: fn(&T) -> TKey,
    valuefunc: fn(&T) -> TValue,
    reducefunc: fn(&Vec<TValue>) -> TReduce,
) -> GroupByTransform<T, TKey, TValue, TReduce> ⓘ
where
    T: PartialEq + Clone + Debug,