#!/usr/bin/perl -l

$dialog->{attributes}{control1} = "abc";
$dialog->{attributes}{control2}[0] = "cde";
$dialog->{attributes}{control2}[1] = "fgh";

for my $control (keys %{ $dialog->{attributes} }) {

    if (ref $dialog->{attributes}{$control} eq 'ARRAY') {
        print "@{ $dialog->{attributes}{$control} }";
    } else {
        print $dialog->{attributes}{$control};
    }
}

__END__
abc
cde fgh

[download]

Or, with an intermediate variable (better readable IMHO): 

for my $control (keys %{ $dialog->{attributes} }) {

    my $val = $dialog->{attributes}{$control};
    
    if (ref $val eq 'ARRAY') {
        print "@$val";
    } else {
        print $val;
    }
}

[download]

And in case there could also be other types (such as hashrefs), you should either test for them, too, or at least write 

    ...
    } elsif (!ref $val) {
        print $val;
    }

[download]

for the simple scalar values.

In reply to Re: How to distinguish an array data type from a scalar data type in a complex hash. by almut
in thread How to distinguish an array data type from a scalar data type in a complex hash. by Steve_BZ

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