Haha, no, that is coincidence... It looks like I should use perlmonks' local search engine... I just googled "perl module to make a range from a list site:perlmonks.org" and did not find that question :( Maybe, searchphrase was not so good.
Anyways, thank you very much!
Re^2: Get ranges from a list of numbers (like 1,2,3 => 1-3)