Counting using Hashes in Perl - perl

Question

I am trying to determine if a certain ID is present in my hash and if it is store the count in hash: this is what I have:
#!/usr/bin/perl
open (INFILE, "parsedveronii.txt")
or die "cannot find infile";
while ($file=<INFILE>){
#array=split "\t", $file;
$hash{$array[1]}= ""; #the keys in my hash are subject IDS
}
open (INFILE1, "uniqueveroniiproteins.txt")
or die "cannot find infile";
while ($file1=<INFILE>){
#array = split "\n", $file1; #array[0] also contains subject IDs
if (exists ($hash{$array[0]})){ #if in my hash exists $array[0], keep count of it
$count++;
}
$hash{$array[1]{$count}}=$hash{$array[1]{$count}} +1;#put the count in hash
}
use Data::Dumper;
print Dumper (\%hash);
for some reason it's not executing the count, any ideas? Any help is appreciated.

Answer 1

Always include use strict; and use warnings; at the top of each and EVERY script.
Your machinations in the second file loop seem a little contrived. If you're just trying to count the subject ids, that is done a lot simpler.
The following is a cleaned up version of your code, doing what I interpret as your intention.
#!/usr/bin/perl
use strict;
use warnings;
use autodie;
open my $fh, '<', "parsedveronii.txt";
my %count;
while (my $line = <$fh>){
chomp $line;
my #array = split "\t", $line;
$count{$array[1]} = 0; #the keys in my hash are subject IDS
}
open $fh, '<', "uniqueveroniiproteins.txt";
while (my $line = <$fh>){
chomp $line;
my #array = split "\t", $line; #array[0] also contains subject IDs
if (exists $count{$array[0]}) { #if in my hash exists $array[0], keep count of it
$count{$array[0]}++;
}
}
use Data::Dumper;
print Dumper (\%count);