Hello, I'm having a problem trying to add arrays to an array. My purpose is to see if each files have the same first columns, and output a file that doesn't have the same columns. All the files follow the same table format(tab delimited). So from each file, i took out the first column and stored it to an array(@row1). And i stored those arrays of first column in to another array @row. However, when i run it, @row doesn't contain array but number of columns. when i print $row [0] , $row[ 2) or etc, it will print numbers not the array of columns i intended to store. can someone tell me how i can fix this problem?

 
#!/usr/bin/perl -w
use strict;
use warnings;
use File::Basename;

die "Usage: perl extracting.pl [directory where files are located]  \n
+" unless ($#ARGV ==0);
my ($folderin) = @ARGV ;
#$dirname = "/data/lgsg/yuho/ProjectSuccess.extracting2columns/sort/ge
+neReadCount"


opendir(DIR, "$folderin") || die "cannot openfolder"; 


my @list = readdir (DIR);
closedir(DIR); 
for(1..2){shift @list;}
my ($filecount, $rowcount) = 0 ;
my (@filename, @row);

foreach my $fileone (@list) 
{    
    $filename[$filecount] = $fileone;
    open(RES,"$folderin/$fileone") || die "could nottt open $fileone\n
+";
    <RES>;
    <RES>;
    my $count = 0;
    my $row1;
    my @genes;
    while(<RES>){
    
    $row1[$count] =(split /\t/)[0];
    $count++;
    
}
    $row[$filecount] = @row1;
    $filecount++;
        
    }


my $unmatched = 0 ;
my @names;
my $filecount1 =$filecount-1;
for (my$chr =1; $chr <= $filecount1; $chr++){
    if ($row[0] ne $row[$chr]) {
    $names[$unmatched] =$filename[$chr];   
        $unmatched++;
    }
    
}


    print "Total # of files compared: $filecount \n"; 
    print "Total # of files unmatched: $unmatched\n"; 
    print "name of the files unmatched : @names \n " ;
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