hi,can someone tell what is going on with the push stmt this code. Is it a hash? an array? And how is it storing the info?

sub load {
    my ($self,$file);  
    open my $f,"<group.conf"; # opens config files
    my $last_group='';
    while (my $line=<$f>) { 
        chomp $line;
        next if length $line == 0; 
        if($line =~/^group\d+/) { 
            $last_group = $line; 
                 $config->{num_groups}++;#countgroups
        next;
        };

        push @{ $config->{groups}->{$last_group} },$line; 
# collects each groups lower and upper bounds (BUT HOW?)
    };
}


group.conf CONTAINS:
group1
AG3333 .Y33 1999
HU4555 .T34 2000

group2
HV9069 .L28 2003
KA5333 .A12 2001

group3
KB
XX

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In reply to PUSH Question by emusic32

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