You're definitely not matching what you want to...

In the line if ($Gene_Symbol =~ /Hox/) {, $Gene_Symbol still has the value it had in the last round of the while loop; it is in no way affected by the foreach loop. What you probably want is to match against the value that you stored in the %symbols hash for every key. That is, 

  if ($symbols{$key} =~ /Hox/) {

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In reply to Re: If Statements and Regular Expressions by pjotrik
in thread If Statements and Regular Expressions by TempAcolyte

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