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- #!/usr/bin/ruby
- #
- ## https://rosettacode.org/wiki/Range_expansion
- #
- func rangex(str) {
- str.split(',').map { |r|
- var m = r.match(/^
- (?(DEFINE) (?<int>[+-]?[0-9]+) )
- (?<from>(?&int))-(?<to>(?&int))
- $/x)
- m ? do {var c = m.ncap; @(Num(c{:from}) .. Num(c{:to}))}
- : Num(r)
- }
- }
- var rstr = rangex('-6,-3--1,3-5,7-11,14,15,17-20').flatten.join(',');
- assert_eq(rstr, "-6,-3,-2,-1,3,4,5,7,8,9,10,11,14,15,17,18,19,20");
- say rstr;
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