Removes all objects from this list that fail to satisfy test
.
An object o
satisfies test
if test(o)
is true.
List<String> numbers = ['one', 'two', 'three', 'four']; numbers.retainWhere((item) => item.length == 3); numbers.join(', '); // 'one, two'
Throws an UnsupportedError if this is a fixed-length list.
void retainWhere(bool test(E element)) { _filter(test, true); }
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-collection/ListMixin/retainWhere.html