$string = $obj->pass("problem1");

##</code><code>##

if ($key eq "problem2"){
        foreach (@ha{$key}){
            print "array : @{$_}\n";

##</code><code>##

#in  main.pl
use packa;
$obj = packa->new;
$string = $obj->pass("problem1");
#print $string;
%ha = $obj -> passhash;
foreach $key (keys (%ha)){
	if ($key eq "problem2"){
		foreach (@ha{$key}){
			print "array : @{$_}\n";
		}
	}
}

#in packa.pm
package packa;
sub new{
	my $class = shift;
	my $self = {};
	bless($self);
	return $self;
}

sub pass{
	my ( $problem1 )= @_;
	print "$problem1\n";
}
sub passhash{
%hash = qw {
	dog voa
	cat mice
};
$hash {'problem2'} = [["ha" , "thing", "thorw"], 
		     ["good", "ssa" , "ham"],
		     ["as", "kid", "wo"],
		     ];

return %hash;

}
1;