I'm a complete newb to Perl so excuse the simple question. I've searched for an answer but there seem to be so many ways to do the same thing I think I'm confusing myself. I have multiple files I need to read data from. The data is always in the same format and there is no repeatable delimiter, so I am using substr to parse the data. I want a count of all unique company IDs combined for all the files. Here is part of my code (I removed unnecessary info) 
#!/user/bin/perl

open (INFILE, "TEST") or die "DIR NOT FOUND! \n$!";
open (OUTFILE, '>> COID_LIST.txt') or die "Unable to open Write File! 
+\n$!";

while (<INFILE>) {
    my $COMPANY_ID = substr $_, 260, 5;
    push @COMPANIES, {comp => $COMPANY_ID};
  }

foreach (@COMPANIES) {
    $sum{$_->{'comp'}} += $_->{'count'};
    }
#Output in %sum
use Data::Dumper;
print OUTFILE Dumper(\%sum);

close OUTFILE;

[download]
This works for a single file but I can't get it to read multiple files. I've tried using open MYDIR "." and foreach to iterate through the files, but I end up with an empty output file. Can someone help me out with this newb question?

In reply to Opening multiple files in directory by molson

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