at first glance¹ this doesn't seem to make much sense:

       if ( defined $seq ) {
# ...
        $seq = '';

[download]

empty strings are defined, you may either want to assign undef or just use that '' is false.

Cheers Rolf

( addicted to the Perl Programming Language)

¹) that is w/o trying to understand the full intended logic

In reply to Re: Reading file into a hash by LanX
in thread Reading file into a hash by PerlSufi

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