Hey I have written a sub routine that aims to extract the column of csv file . 
sub column_segregation
{
    my $o=$_[0];
    
    my $csv = Text::CSV->new ({ binary => 1 });
while (my $row = $csv->getline($io)) {
        push @array_A2, $row->[$o];
}
   return (@array_A2);                                     
}

[download]

So what actually is happening , is that for multiple function calls , the sending parameter is our column number . The $o is getting updated but the return via @array_A2 is always corresponding to the first call . So I figured might be the array_A2 is not getting overwritten so just after the sub routine name I added 

@array_A2=();

[download]

now what is happening is that it always return an empty array

i want that the sub routine should return the array having entries corresponding to a particular column . I know I am posting this as a different question , because I really cannot figure out why is this happening that $o is getting updated but not in push @array_A2, $row->$o;

In reply to issue with column extraction in perl by Anonymous Monk

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