where method

Map<K, V> where(
  1. bool predicate(
    1. K key,
    2. V value
    )
)

Filter map by predicate

Implementation

Map<K, V> where(bool Function(K key, V value) predicate) {
  final filtered = <K, V>{};
  forEach((key, value) {
    if (predicate(key, value)) {
      filtered[key] = value;
    }
  });
  return filtered;
}