You've already gotten the fix, but the important thing to note here is that you don't have to "start" a hash value with anything. You can just increment it, and it will be created and set to 1 if it didn't already exist. That saves you from having to do code like this, which might be necessary in lower-level languages: 

if( $gene_count{$key} ){  # it already exists
  $gene_count{$key}++;    # so increment it
} else {                  # it doesn't exist
  $gene_count{$key} = 1;  # so create and set it
}

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Aaron B.
Available for small or large Perl jobs and *nix system administration; see my home node.

In reply to Re: Looping through a file, reading each line, and adding keys/editing values of a hash by aaron_baugher
in thread Looping through a file, reading each line, and adding keys/editing values of a hash by Anonymous Monk

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