forEach method Null safety

  1. @override
void forEach(
  1. void f(
    1. K,
    2. V
    )
)
override

Applies action to each key/value pair of the map.

Calling action must not add or remove keys from the map.

final planetsByMass = <num, String>{0.81: 'Venus', 1: 'Earth',
  0.11: 'Mars', 17.15: 'Neptune'};

planetsByMass.forEach((key, value) {
  print('$key: $value');
  // 0.81: Venus
  // 1: Earth
  // 0.11: Mars
  // 17.15: Neptune
});

Implementation

@override
void forEach(void Function(K, V) f) {
  _base.forEach(f);
}