use strict;
use warnings;
use Data::Dumper;
use threads;

{
	my @ReturnData = sub1();
	print Dumper(@ReturnData);
}
{
	my $ReturnData = sub1();
	print Dumper($ReturnData);
}
{
	my $thr = threads->new(\&sub1);
	my @ReturnData = $thr->join;
	print Dumper(@ReturnData);
}
{
	my $thr = threads->new(\&sub1);
	my $ReturnData = $thr->join;
	print Dumper($ReturnData);
}
{
	my ($thr) = threads->new(\&sub1);
	my @ReturnData = $thr->join;
	print Dumper(@ReturnData);
}
{
	my ($thr) = threads->new(\&sub1);
	my $ReturnData = $thr->join;
	print Dumper($ReturnData);
}

sub sub1
{
    return wantarray ? (1,2,3) : [4,5,6];
}