retainWhere method
Removes all objects from this list that fail to satisfy test.
An object o satisfies test if test(o) is true.
final numbers = <String>['one', 'two', 'three', 'four'];
numbers.retainWhere((item) => item.length == 3);
print(numbers); // [one, two]
The list must be growable.
Implementation
@override
void retainWhere(bool Function(E element) test) {
_Node<E>? current = _head;
while (current != null) {
final next = current.next; // Store next before potential removal
if (!test(current.value)) {
remove(current.value); // Use existing remove method
}
current = next;
}
}