dart:core

lastIndexOf method

int lastIndexOf (

1. Pattern pattern,
2. [int? start]

)

The starting position of the last match pattern in this string.

Finds a match of pattern by searching backward starting at start:

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

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

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

If start is omitted, search starts from the end of the string. If supplied, start must be non-negative and not greater than length.

Implementation

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