Here's a GRT variant on the ST approach above that will, for sufficiently large datasets, be faster because it relies on the default sort comparison: 

c:\@Work\Perl\monks>perl -wMstrict -le
"use Socket;
 ;;
 my %hosts = (
   host0 => { ip => q{17.198.26.3}  },
   host1 => { ip => q{113.34.87.9}  },
   host2 => { ip => q{23.6.8.136}   },
   host3 => { ip => q{10.45.18.207} },
   host4 => { ip => q{192.168.31.8} },
   host5 => { ip => q{10.17.227.3}  },
   host6 => { ip => q{192.168.1.6}  },
   host7 => { ip => q{172.16.1.1}   },
   host8 => { ip => q{3.77.45.22}   },
   host9 => { ip => q{17.216.1.1}   },
   );
 ;;
 my $aton = 'a4';
 ;;
 print qq{$_ - $hosts{$_}->{ip}} for
   map  unpack(qq{x[$aton] a*}),
   sort
   map  pack(qq{$aton a*}, inet_aton($hosts{$_}->{ip}), $_),
   keys %hosts
   ;
"
host8 - 3.77.45.22
host5 - 10.17.227.3
host3 - 10.45.18.207
host0 - 17.198.26.3
host9 - 17.216.1.1
host2 - 23.6.8.136
host1 - 113.34.87.9
host7 - 172.16.1.1
host6 - 192.168.1.6
host4 - 192.168.31.8

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Give a man a fish:  <%-{-{-{-<

In reply to Re^2: Sorting Hash Value Object's IPv4 Address by AnomalousMonk
in thread Sorting Hash Value Object's IPv4 Address by razmeth

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