)
Returns the position of the first match of pattern in this string,
starting at start, inclusive:
var string = 'Dartisans';
string.indexOf('art'); // 1
string.indexOf(new RegExp(r'[A-Z][a-z]')); // 0
Returns -1 if no match is found:
string.indexOf(new RegExp(r'dart')); // -1
start must not be negative or greater than length.
Source
/**
* Returns the position of the first match of [pattern] in this string,
* starting at [start], inclusive:
*
* var string = 'Dartisans';
* string.indexOf('art'); // 1
* string.indexOf(new RegExp(r'[A-Z][a-z]')); // 0
*
* Returns -1 if no match is found:
*
* string.indexOf(new RegExp(r'dart')); // -1
*
* [start] must not be negative or greater than [length].
*/
int indexOf(Pattern pattern, [int start]);