addAll method

void addAll(Map<K, V> other)

Adds all key-value pairs of other to this map.

If a key of other is already in this map, its value is overwritten.

The operation is equivalent to doing this[key] = value for each key and associated value in other. It iterates over other, which must therefore not change during the iteration.

Source

void addAll(Map<K, V> other) {
  other.forEach((K key, V value) {
    this[key] = value;
  });
}

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-collection/SplayTreeMap/addAll.html