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