blokhead,
You may want to modify your map line: 
my @ith_data = map { defined $data{$_}[$i] ? $data{$_}[$i] : '' } @key
+s;

[download]
This way 0 and "0" will not get changed to "".

Cheers - L~R

In reply to Re: Re: Custom printing of an HoA by Limbic~Region
in thread Custom printing of an HoA by bioinformatics

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