groupBy<K> method

Map<K, List<V>> groupBy<K>(
  1. Func1<V, K> getKey
)

Splits an iterable into sub-lists stored in a map, based on result of calling getKey function on each element of this, and grouping the results according to values returned.

Implementation

Map<K, List<V>> groupBy<K>(Func1<V, K> getKey) => _groupBy(getKey, this);