indexWhere abstract method
The first index in the list that satisfies the provided test.
Searches the list from index start to the end of the list.
The first time an object o is encountered so that test(o) is true,
the index of o is returned.
final notes = <String>['do', 're', 'mi', 're'];
final first = notes.indexWhere((note) => note.startsWith('r')); // 1
final second = notes.indexWhere((note) => note.startsWith('r'), 2); // 3
Returns -1 if element is not found.
final notes = <String>['do', 're', 'mi', 're'];
final index = notes.indexWhere((note) => note.startsWith('k')); // -1
Implementation
int indexWhere(bool test(E element), [int start = 0]);