mapKeys<K2> method

Map<K2, V> mapKeys<K2>(
  1. K2 f(
    1. K key
    )
)

Returns a new map with keys transformed by f.

Implementation

Map<K2, V> mapKeys<K2>(K2 Function(K key) f) =>
    {for (final e in entries) f(e.key): e.value};