HashMap<K, V>.from constructor Null safety

HashMap<K, V>.from(
  1. Map other

Creates a HashMap that contains all key/value pairs of other.

The keys must all be instances of K and the values of V. The other map itself can have any type.


factory HashMap.from(Map<dynamic, dynamic> other) {
  HashMap<K, V> result = HashMap<K, V>();
  other.forEach((dynamic k, dynamic v) {
    result[k as K] = v as V;
  return result;