Mirrors/nc-photos
1
0
Fork 0
mirror of https://gitlab.com/nkming2/nc-photos.git synced 2025-03-26 08:54:42 +01:00
Code Issues Projects Releases Packages Wiki Activity

Make groupBy return a map instead

Browse source
This commit is contained in:
Ming Ming 2022-08-11 00:48:53 +08:00
parent ca7639ca05
commit ef8c7681d7
1 changed files with 2 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
app/lib/iterable_extension.dart
View file

@ -27,12 +27,11 @@ extension IterableExtension<T> on Iterable<T> {
bool containsIdentical(T element) =>
containsIf(element, (a, b) => identical(a, b));
Iterable<Tuple2<U, List<T>>> groupBy<U>({required U Function(T e) key}) {
final map = fold<Map<U, List<T>>>(
Map<U, List<T>> groupBy<U>({required U Function(T e) key}) {
return fold<Map<U, List<T>>>(
{},
(previousValue, element) =>
previousValue..putIfAbsent(key(element), () => []).add(element));
return map.entries.map((e) => Tuple2(e.key, e.value));
}
/// Return a new list with only distinct elements