Hi all, A few updates: when I used autodie, I got an error saying "main::OUT is used only once, possible error at line 47." I fixed it by using a scalar handle as shown below. Also, I am getting a blank file (18.7 MB), not an empty one. Despite fixing this error, I still get a blank output file. 

use warnings;

my $OUT;
open $OUT, ">", "$filename.counts" or die "$filename.counts: $!";
foreach my $chr (keys %chrsize){
    my $size = $chrsize{$chr};  # chr, size, index work (print stateme
+nts show reasonable values)
    foreach my $index (0..$size) {
        #if (exists $piRNA{$chr}{$index}) {
        #   print $OUT "$chr\t$index\t$piRNA{$chr}{$index}\n";}
        $piRNA{$chr}{$index}=0 if (!exists $piRNA{$chr}{$index});
        #print "$piRNA{$chr}{$index}\n" if (exists $piRNA{$chr}{$index
+});  # test code I've put in
        print $OUT "$chr\t$index\t$piRNA{$chr}{$index}\n";
     }
}

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In reply to Re: If Condition causes totally blank Output File/Issue in Writing to Output by hghosh
in thread If Condition causes totally blank Output File/Issue in Writing to Output by hghosh

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