#!/usr/bin/perl --
use strict; use warnings;
use Data::Dump qw/ dd /; # sub dd { use Data::Dumper; print Data::Dumper->new([@_])->Sortkeys(1)->Indent(1)->Useqq(1)->Dump . "\n"; }

my @feet = qw/ left right /;
my @shoes = qw/ loader sneaker boot /;
my @things;
dd { feet => \@feet, shoes => \@shoes, things => \@things };




push @shoes, qw/ slippers /;
dd { feet => \@feet, shoes => \@shoes, things => \@things };




push @things, \@feet, \@shoes;
dd { feet => \@feet, shoes => \@shoes, things => \@things };

##</code><code>##

{
  feet   => ["left", "right"],
  shoes  => ["loader", "sneaker", "boot"],
  things => [],
}





{
  feet   => ["left", "right"],
  shoes  => ["loader", "sneaker", "boot", "slippers"],
  things => [],
}




do {
  my $a = {
    feet   => ["left", "right"],
    shoes  => ["loader", "sneaker", "boot", "slippers"],
    things => ['fix', 'fix'],
  };
  $a->{things}[0] = $a->{feet};
  $a->{things}[1] = $a->{shoes};
  $a;
}