Dear monks, I have an array of sequences, each with a unique id. I'm trying to extract those sequences based on id's in a second array. The problem is that I am extracting them in the order they appear in the sequence array, not the order in the second array (which is what I want). How can I alter my code to extract ther sequences based on the order they appear in array2? Thanks! 

Sequence file (@array1) looks like this:

>gi|13470331|ref|NP_101896.1| hypothetical protein 
MFWVTKKALMPFLMLPAGIIFVSAVGYAINWLFSTLFQFQPPLVEGPAGPVTVLIFTITMLLAYDISYYL
>gi|13470319|ref|NP_101897.1| hypothetical protein 
MGAYCQAHPACKVTDRTVIGRRDAAMNAPFVLAIPRTRTFEVVTSAARLAEIAPAWTALWQRAGGLVFQH

my @array2 = qq(13470319 13470331 15460001 13490216);

foreach my $line (@array1)   {
     if ($line =~  /^gi\|(\d+)/)  {
         for (my $i=0;$i<@array2; $i++)  {
               if ($array2[$i] == $1)  {
                  print "$line ";
              }
         }
     }
}

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In reply to retrieving in the correct order by Anonymous Monk

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