mapRemoveValue<K, V> static method

void mapRemoveValue<K, V>({ required Map<K, List<V>> map, required K key, required V value, })

Removes all occurrences of value from the list at key within map.

Uses an immutable approach: creates a new filtered list rather than mutating the existing one.

Example:

final map = <String, List<int>>{'scores': [100, 200, 100]};
MapExtensions.mapRemoveValue(map: map, key: 'scores', value: 100); // {'scores': [200]}

Implementation

static void mapRemoveValue<K, V>({
  required Map<K, List<V>> map,
  required K key,
  required V value,
}) {
  if (value == null) return;
  // ignore: saropa_lints/avoid_parameter_mutation -- function is designed to mutate the map parameter
  map.update(
    key,
    (List<V> list) => list.where((V v) => v != value).toList(),
    ifAbsent: () => <V>[],
  );
}