I have two input files: table.txt and values.txt

table.txt looks like the following:

 

xanmn_chr09_0114-xanmn_chr09_0114   3346

xanmn_chr09_0129-xanmn_chr09_0129   3358

xanmn_chr09_0116-xanmn_chr09_0116   3348

xanmn_chr09_0127-xanmn_chr09_0127   3354

[download]

values.txt looks like this:

3346
1933 
1371 
1448
2762 
1395

[download]

Then, I want to compare the second column of table.txt with the first column of values.txt. So, if they have the same number, for instance 3346, the script should return xanmn_chr09_0114-xanmn_chr09_0114 because xanmn_chr09_0114-xanmn_chr09_0114 corresponds to 3346.

This is my script:


open(FILE1, "<", table.txt)

open(FILE2, "<", values.txt)

my %ids2proteins=();

   while(my $row = <FILE2>){
   chomp $row;
   
   my @column = split(/\t/, $row);
   my $protein_number = $column[0];
      
      while(my $line= <FILE1>){
      chomp $line;
      
      my @fields = split(/\t/, $line);
      my ($ids,$proteins) = ($fields[0],$fields[1]);
      $ids2proteins{$ids} = $proteins;
      
      foreach my $keys(keys %ids2proteins){
         my $values = $ids2proteins{$keys};
         
         if($values eq $protein_number){
            print "$keys => $protein_number";
}}}}

[download]


Everything works well until the if inside the foreach. I'm relatively new in Perl, and I think that I have a problem with the logic of the problem.

So, I will really appreciate the help.

In reply to How to compare hash values to array values in Perl by To_Bz

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