! $Id: rindex,v 1.1 2001/12/07 16:54:18 toast Exp $
RINDEX([^]charlist string)
  Returns the index of the last character in string that is listed in
  charlist.

  If charlist is prepended by a carat (^), then the index of the last 
  character in string that is not listed in charlist is returned.

Examples:
  rindex(. filename.ext)	- Returns 8
  rindex(.e filename.ext)	- Returns 9
  rindex(^atcg ttacgatgaafgtat)	- Returns 10

See also:
  FUNCTIONS INDEX
