...Update: I won't. It's not needed in the solution. You should use the documented API, i.e. Parent and get_leaves.
Good luck :)
#!/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"]],
)
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.