RegexMatcher.Start Method

Explanation	Gets the leading index of the matched result. You can specify group to get the start index of the substring forward-referenced by a group of regular expression patterns. Groups are numbered from 1 to right, with group 0 representing the entire pattern. Regular expression patterns such as "(a) *" may match the empty string. In this case it returns -1 . However, if you specify 0 for the group number, 0 is returned.
Call format	var s = rm.Start( [ group ] )
Return value	Matched part or start index of forward reference group From Ver.5.0.1, the index is in character units in Unicode mode. Other than that, it is in bytes.
Arguments	integer group	The number of the forward reference group you want to get If omitted, it will be 0 (entire pattern)
Exception	Func 4	The argument value is invalid
	Func 14	The value cannot be referenced
Example of use	`var m = RegexPattern.Compile("Biz/([a-zA-Z]+)").Matcher("Biz/Browser"); if (m.Matches()) { print(m.Start(1), m.End(1), m.Group(1), "\n"); }`
Related item	End, Group methods