# File lib/backports/1.8.7/string/rpartition.rb, line 5 def rpartition(pattern) pattern = Backports.coerce_to(pattern, String, :to_str) unless pattern.is_a? Regexp i = rindex(pattern) return ["", "", self] unless i if pattern.is_a? Regexp match = Regexp.last_match [match.pre_match, match[0], match.post_match] else last = i+pattern.length [self[0...i], self[i...last], self[last...length]] end end