Hi I have a sub routine which reads in the result of thousands of open3 calls (ffprobe for info) and parses the results. Everything works fine except for uninitialized warnings for about 400 out of around 33k entries Trying to get the the values that are missing is proving problematic 
foreach my $file (keys %hash){
    foreach my $opt (keys %{$hash{$file}}){
        if (!(defined $opt,$hash{$file}->{$opt})){
        say '9809 ', join '|',$file,$opt,$hash{$file}->{$opt};
    }

    $hash{$file}->{$opt}=~s/[^[:ascii:]]//gxms;
    my $lined=join ("\t",$file,$opt,$hash{$file}->{$opt})."\n";
}

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This gives initialized warnings on the last two lines if the value is blank. However I cant seem to get the problems lines to check. The defined check at the top prints everything that is either blank or 0. However 0 is a fully valid value, not undef. If I test for true (if ($hash{$file}->{$opt}){}), everything with a zero gets removed. Is there any way around this? (I'm probably missing something basic here) thanks Mike

In reply to defined and value is 0 by redtux

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