Hello, I am working on making an index of a book. I have many numbers that I must sort in ascendent order -- but indices in books require a special format. Say that I have a list of number like this:
(15, 18, 30, 31, 42, 45, 46, 47) the output must be: 15, 18, 30-31, 42, 45-47 I.e. consecutive numbers must be joined with "-". I cannot figure out how to do it in Perl script. I would appreciate very much if someone could give me a clue. Thank you very much in advance! Best regards, Nobumi Iyanaga Tokyo, Japan
