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Util fn to trasform list in-place

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Ming Ming 2022-06-06 18:06:15 +08:00
parent f6614a3542
commit b809809727
1 changed files with 12 additions and 0 deletions
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12
app/lib/list_extension.dart
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@ -1,6 +1,7 @@
import 'dart:math' as math;
import 'package:collection/collection.dart';
import 'package:nc_photos/int_extension.dart';
extension ListExtension<T> on List<T> {
Iterable<T> takeIndex(List<int> indexes) => indexes.map((e) => this[e]);
@ -26,4 +27,15 @@ extension ListExtension<T> on List<T> {
void stableSort([int Function(T a, T b)? compare]) {
mergeSort(this, compare: compare);
}
/// In-place transform and return this
///
/// Since the elements are in-place transformed, they have to share the same
/// type
List<T> transform(T Function(T element) fn) {
for (final i in 0.until(length)) {
this[i] = fn(this[i]);
}
return this;
}
}