3.2.128 rindex

rindex 

STR

, 

SUBSTR

, 

POSITION

 rindex 

STR

, 

SUBSTR

This function works just like index except that it returns the position of the last occurrence of SUBSTR in STR (a reverse index ). The function returns $[-1 if not found. Since $[ is almost always 0 nowadays, the function almost always returns -1. POSITION , if specified, is the rightmost position that may be returned. To work your way through a string backward, say:

$pos = length $string; while (($pos = rindex $string, $lookfor, $pos) >= 0) {     print "Found at $pos\n";     $pos--; }