# lastIndexOf method

int lastIndexOf (Pattern pattern, [ int start ])

Returns the position of the last match `pattern` in this string, searching backward starting at `start`, inclusive:

    var string = 'Dartisans';
    string.lastIndexOf('a');                    // 6
    string.lastIndexOf(new RegExp(r'a(r|n)'));  // 6

Returns -1 if `pattern` could not be found in this string.

    string.lastIndexOf(new RegExp(r'DART'));    // -1

The `start` must be non-negative and not greater than length.

## Implementation

    int lastIndexOf(Pattern pattern, [int start]);