Re^3: Perl delete function

[LanX]

Keys in hashes are unique, so you never had more than one "apple" in hash %m2.

But it's still unclear which logic you expect, because thats a perfect set operation.

Could it be that you want to compare arrays one by one by position?

Then please use a loop to do so.

[annel]

Yes, I would like to compare the arrays one by one by position. I have attempted following:

use strict;
use warnings;

open (FILE, "a") or die "Unable to open ref file.\n";
my @data1 =<FILE> ;
close(FILE);

open (FILE, "b") or die "Unable to open new file.\n";
my @data2 =<FILE> ;
close(FILE);
my $i;

for( $i = 0; $i < 2; $i++){
       if ($data1[$i] ne $data2[$i]){
        print "Mismatch for $data1[$i] and $data2[$i]\n";
        exit;
    }
}

But the error occurs when file 1 contains one line and file 2 contains 2 lines.

[hdb]

You need to determine the size of the smaller array and restrict the loop accordingly.

my $size = @data1 < @data2 ? @data1 : @data2;

[annel]

Thanks for the tips. It works.