If the PATTERN contains parentheses, additional
  list elements are created from each matching sub­
  string in the delimiter.

        split(/([,-])/, "1-10,20", 3);

  produces the list value

        (1, '-', 10, ',', 20)

##</code><code>##

-- 
Joost       downtime n. The period during which a system
            is error-free and immune from user input.