#!/usr/bin/perl --
use strict;
use warnings;
use Data::Dump qw/ dd /;
dd( deef( [ qw/ Cobra /] , [qw/ Fox /] ) );
dd( deef( [ qw/ Dog Fox Wolf /] , [qw/ Fox /] ) );
sub deef {
my( $got, $want) = @_;
my %have; undef @have{ @$got };
my @add = grep { !exists $have{$_} } @$want;
undef %have; undef @have{ @$want };
my @del = grep { !exists $have{$_} } @$got;
[deeef( @add )], [deeef( @del )];
}
sub deeef {
my( @animals ) = @_;
my %catcatdog = (
Mammal => {
Bovine => ["Cow", "Bison"],
Canine => ["Dog", "Fox", "Wolf"],
Equine => ["Horse", "Zebra", "Pony"],
},
Reptile => {
Bird => ["Pigeon", "Canary", "Owl"],
Lizard => ["Salamander", "Chameleon"],
Snake => ["Python", "Cobra"],
},
);
my %dogcatcat;
for my $cat ( keys %catcatdog ){
for my $catcat ( keys %{ $catcatdog{ $cat } } ){
for my $dog( @{ $catcatdog{$cat}{$catcat} } ){
push @{ $dogcatcat{$dog} }, $catcat, $cat, ;
}
}
}
return map {; [ $_, @{ $dogcatcat{$_} } ] } @animals;
}
__END__
(
[["Fox", "Canine", "Mammal"]],
[["Cobra", "Snake", "Reptile"]],
)
(
[],
[["Dog", "Canine", "Mammal"], ["Wolf", "Canine", "Mammal"]],
)
|