http://qs321.pair.com?node_id=11133091


in reply to Re^2: Regexp substitution on variable-length ranges with embedded code?
in thread Regexp substitution on variable-length ranges with embedded code?

Simple with a second line. You don't really need it in one line, do you?

#!/usr/bin/perl use strict; # https://perlmonks.org/?node_id=11133054 use warnings; $_ = '43:1:1; 43:1:2; 43:1:3; 43:1:4; 43:1:5; 43:1:6; 43:1:9; 43:1:10; + 27:3:2; 27:3:7; 27:3:8; 27:3:9; 65:1:4; 65:1:18; 65:1:28'; print "$_\n"; s/\b(\d+:\d+:)(\d+)\K(; \1((??{$+ + 1}))\b)+/-$+/g; 1 while s/\b(\d+:\d+:)[\d,-]+\K; \1([\d,-]+)/,$2/; print "$_\n";

Outputs:

43:1:1; 43:1:2; 43:1:3; 43:1:4; 43:1:5; 43:1:6; 43:1:9; 43:1:10; 27:3: +2; 27:3:7; 27:3:8; 27:3:9; 65:1:4; 65:1:18; 65:1:28 43:1:1-6,9-10; 27:3:2,7-9; 65:1:4,18,28