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use strict; use warnings; ... { say $pkgs{ $pkg }->{ max keys %{ $pkgs{ $pkg } } } }
abc-4.2.11-8.el7_2.x86_64 samba-common-libs-4.2.12-7.el7_2.x86_64 xyz-libs-4.2.13-7.el7_2.x86_64