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  1. or download this
      @path = split(/\\/, $0);
      pop(@path);
      $path = join('\\', @path);
    
  2. or download this
    BEGIN {
     my $foo = 'bar';
    }
    print $foo;
    
  3. or download this
    my $foo = 'bar';
    BEGIN {
     print $foo;
    }