Thanks! But for example: 

use strict;
use warnings;
use Data::Dumper;
open (FILE, "/Users/Pabli/Desktop/gene_association.goa_human");
open (FILE2, "/Users/Pabli/Desktop/go3.obo");  

my %go_accession_hash=();
while(<FILE>) { 
                   
    my @array_with_all_fields=split(/\t/);
  
    if ($array_with_all_fields[2] eq "TP53"){
    
       my $mio=$array_with_all_fields[4];
       %go_accession_hash=($mio,'');
  
    }
    print "".Dumper(%go_accession_hash)."\n";
    my @test2= keys %go_accession_hash;
  
    }
         
while(<FILE2>){
    
    print "".$test2[0]."\n";

}
close FILE;
close FILE2;

[download]

When i print the entire hash table outside from the "if", it prints only the last element (key) of the hash table for "n" times and i don't understand the reason!

Thanks for help

Paola

In reply to Re^2: Problem of context? by pabla23
in thread Problem of context? by pabla23

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