description

# lastIndexOf abstract method

int lastIndexOf(

1. E element, [
2. int? start

])

The last index of `element` in this list.

Searches the list backwards from index `start` to 0.

The first time an object `o` is encountered so that `o == element`, the index of `o` is returned.

    final notes = <String>['do', 're', 'mi', 're'];
    const startIndex = 2;
    final index = notes.lastIndexOf('re', startIndex); // 1

If `start` is not provided, this method searches from the end of the list.

    final notes = <String>['do', 're', 'mi', 're'];
    final index = notes.lastIndexOf('re'); // 3

Returns -1 if `element` is not found.

    final notes = <String>['do', 're', 'mi', 're'];
    final index = notes.lastIndexOf('fa'); // -1

## Implementation

    int lastIndexOf(E element, [int? start]);