fillRange method
Overwrites a range of elements with fillValue
.
Sets the positions greater than or equal to start
and less than end
,
to fillValue
.
The provided range, given by start
and end
, must be valid.
A range from start
to end
is valid if 0 ≤ start
≤ end
≤ length.
An empty range (with end == start
) is valid.
If the element type is not nullable, the fillValue
must be provided and
must be non-null
.
Example:
final words = List.filled(5, 'old');
print(words); // [old, old, old, old, old]
words.fillRange(1, 3, 'new');
print(words); // [old, new, new, old, old]
Implementation
@override
void fillRange(int start, int end, [T? fill]) {
_context.conditionallyRunInAction(() {
if (end > start) {
final oldContents = _list.sublist(start, end);
_list.fillRange(start, end, fill);
final newContents = _list.sublist(start, end);
_notifyRangeUpdate(start, newContents, oldContents);
}
}, _atom);
}