If, by 'null' and 'blank', you mean undef, note that length undef is zero. That's also true of the empty string, ''. This may work for you, 

if (length $day[5]) {
    print $day[5];
}
else {
    print '00:00:00';
}

[download]
or just, print length($day[5])? $day[5]: '00:00:00'; See trinary op, ?:, in perlop.

After Compline,
Zaxo

In reply to Re: Null in Array by Zaxo
in thread Null in Array by Pyramid

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