Not golfed. Just wanted to present a GRT: 

#!/usr/bin/perl -w
use strict;

print join ", ", grep s{\0(=|(.)(....))}{
    "\0" eq $1 ? $1 : "-" eq $2 ? -1-unpack("N",$3) : unpack("N",$3)
}ges||1, sort grep s{(-?\d+|\0)}{ "\0" . (
    "\0" eq "=" ? $1 : $1 < 0 ? "-".pack("N",-1-$1) : ":".pack"N",$1
)}ge||1, @{[qw( 1a 2a a10 1 0 0alpha 2 AbBa 10 -13bravo 42 13 adam1
    20b abc a-BC 18 92 A-b-c Arthur Bravo 25 11a 12a ab-ba )]};

[download]
(updated.)

        - tye (but my friends call me "Tye")

In reply to (tye)Re: (Golf) Keysort by tye
in thread (Golf) Keysort by demerphq

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