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  1. or download this
    foreach my $employee (@employees) { 
       if ( $employee->salary < $threshold ) { 
          increase_salary( $employee, 3_000 );
       } 
    }
    
  2. or download this
        use strict;
        use warnings;
    ...
        }
    
    1;
    
  3. or download this
    > perl  unknown.plx
    
    ...
    Show    |okay|