final _set = [1, 1, 2, 3, 4].toSet(); besides effective dart suggesting prefer_collection_literals
it really looks like java or c# rather than dart (no offense)
does anybody knows
How to convert a
ListtoSetusing literals
(suggesting to add // ignore: prefer_collection_literals isn't an answer)
You can do something like this:
main() { final list = [1, 1, 2, 3, 4]; final _set = {...list}; print('set: $_set'); // set: {1, 2, 3, 4} } You can write the same code as final _set = {1, 1, 2, 3, 4};.
When you write {key: value, key: value} that is a Map literal, but if you just do {value, value, ...} that becomes a Set literal.
List literal at all instead of directly using a Set literal. Your question doesn't make much sense; either you're initializing a Set from a literal, in which case you should just use a Set literal directly, or you're initializing a Set from some runtime List, in which case Set.of() or List.toSet() would work just as well.Assert(...) I need to check that a list has no duplicate, I struggle to see how the use case this is relevant to the answer that I already accepted stackoverflow.com/a/66226798/9836706
Set.fromisn't a literal, as a matter of fact my linter gives me the same warning, but you gave me an idea:Set.fromis actually aLinkedHashSetwhich is anexceptionmentioned here dart-lang.github.io/linter/lints/…