Hello Monkies,

I have a question - Can i use a second regex when looking through a line in a file.

For instance i am currently looking for Homo sapien in one line of a file, but i also want to look for chromosome 11 say. At the moment, i am saving the filtered data from Homo sapiens search into an array, then conducting the search on this to find the chromosome 11. 

  for (my $i = 0 ; $i<scalar @line; $i++)
  {
     if ($line[$i] =~ /^>/)
     {
           $current_subject = $line[$i];
          chomp ($current_subject);
          push (@filtered_subjects, $current_subject);
     }
  }
  my @element;

[download]

So stored in the array is: 

>gi|14670349|ref|NM_032999.1| Homo sapiens general transcription facto
+r II, i (GTF2I), transcript
>gi|2827179|gb|AF035737.1|AF035737 Homo sapiens general transcription 
+factor 2-I (GTF2I) mRNA, complete
>gi|19908489|gb|AF343351.1| Mus musculus TFII-I repeat domain-containi
+ng protein 3 beta 7 mRNA,

[download]

Then i look through each element looking for the species, which comes from a HTML list. 
  foreach my $z (@filtered_subjects)
  {
     chomp $z;
     @element = split('\|', $z);
     if($element[4] =~ /\Q$Homosapiens\E/)
     {
     push(@chromoLine, $z);
     }
  }
}

[download]
Is this the best way to do it, or can i use something like:
     if($element[4] =~ /\Q$Homosapiens$choromosome\E/)

[download]

Any help is appreciated.

thanks,
MonkPaul.

In reply to Double RegEx by MonkPaul

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