i am getting an error does anyone know what this means and how i can fix it? here is the code 
#!/opt/perl5/bin/perl -w

use strict;

my %lines; 
my @dupes;

while($_ =<> and $_ ne "quit\n"){
    $lines{$_}++;        
    if($lines{$_} == 2){ 
         push @dupes, $_;
     }
}
if(@dupes){
     print "Here are your duplicate lines\n\n";
     foreach(@dupes){
         print $_;
     }
} else {
      print "\nNo Duplicates Found!\n";
}

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and here is the error i am getting 
Value of <HANDLE> construct can be "0"; test with defined() at day1_te
+st.1.pl line 8.

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snowrider

In reply to errors by snowrider

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