sequenceList method
Turns an Iterable<Result<T>>
into an Option<List<T>>
.
If all elements are Ok, it returns a Some<List<T>>
. If any element
is an Err, it returns None, discarding the specific error.
Implementation
Option<List<T>> sequenceList() {
final buffer = <T>[];
for (final e in this) {
if (e.isErr()) {
return const None();
}
buffer.add(e.unwrap());
}
return Some(buffer);
}